Adapter, battery, battery device and electric equipment
By designing bendable adapter structure and induction compressed welding connection technology, the problems of complex welding process, low yield and low space utilization in the existing technology are solved, and efficient and tight welding and space optimization are achieved.
Patent Information
- Application Number
- CN202421394776.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-06-18
AI Technical Summary
In the prior art, the adapter and the pole ears of the battery cell are connected by ultrasonic and laser welding, resulting in complex welding process and low welding yield, and the heat generated by welding will affect the parts around the adapter, occupying a large space and low space utilization.
An adapter is designed, including a first connection part, a transition part and a second connection part, which can be bent so that the second connection part can be bent relative to the first connection part, thereby reducing the heat influence and space occupation during welding, and connecting through induction welding.
The welding yield and battery production yield of adapters and battery cells are improved, the impact on parts during welding is reduced, and the space utilization and power density of the battery is improved.
Smart Images
Figure CN222867990U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of battery technology, and in particular relates to an adapter, a battery, a battery device and an electrical equipment. Background Art
[0002] At present, the adapter is an important conductive part inside the battery. It is used to electrically connect the pole of the cover plate assembly and the pole ear of the battery cell so that the electric energy of the battery cell can be conducted to the pole. Since the connection between the adapter and the pole ear of the battery cell is mostly formed by ultrasonic and laser welding, ultrasonic and laser welding will generate a lot of heat, which will affect the parts around the adapter. The welding process is complicated and the welding yield is low. Utility Model Content
[0003] In response to the shortcomings of the prior art, the present application provides an adapter, a battery, a battery device and electrical equipment, which can reduce the impact on components around the adapter during the welding process between the second connecting part and the pole ear of the battery cell, thereby improving production yield; it can also reduce the space occupied during the connection between the second connecting part and the pole ear of the battery cell, which is conducive to improving the space utilization rate of the structure formed by the adapter.
[0004] In a first aspect, the present application provides an adapter for electrically connecting a battery cover assembly and a battery cell, the adapter comprising a first connection portion, a transition portion, and a second connection portion sequentially connected along a first direction, the transition portion being capable of being bent so that the second connection portion can be bent relative to the first connection portion, the first connection portion being used to connect to a pole of the cover assembly, and the second connection portion being used to connect to a pole ear of the battery cell.
[0005] In a possible implementation, the second connection portion can be bent in a plane different from that of the first connection portion.
[0006] In a possible embodiment, the adapter has a first notch for forming the transition portion, and the first notch is formed by an end surface of the first connection portion close to the second connection portion, a peripheral side surface of the transition portion, and an end surface of the second connection portion close to the first connection portion; an opening of the first notch is located on the peripheral side wall of the adapter along a second direction, and the second direction is a width direction of the adapter.
[0007] In a possible embodiment, the adapter has a first notch and a second notch for forming the transition portion, and the first notch is formed by part of the end surface of the first connection portion close to the second connection portion, part of the peripheral side surface of the transition portion, and part of the end surface of the second connection portion close to the first connection portion, and the second notch is formed by part of the end surface of the first connection portion close to the second connection portion, part of the peripheral side surface of the transition portion, and part of the end surface of the second connection portion close to the first connection portion; the opening of the first notch is located on the peripheral side wall of the adapter along the second direction, and the opening of the second notch is located on the peripheral side wall of the adapter along the second direction, and the opening of the first notch and the opening of the second notch are arranged opposite to each other along the second direction, and the second direction is the width direction of the adapter.
[0008] In a possible implementation, an extension length of the second connection portion along the first direction is G, and the range of G is [5, 100] mm.
[0009] In a possible implementation manner, an extension length of the transition portion along the first direction is L, and the range of L is [0.1G, 0.5G].
[0010] In a possible implementation, a cross section of the transition portion along a second direction is circular, the second direction is perpendicular to the first direction, and a radius of the cross section of the transition portion is R, where R is in a range of [L, 5L].
[0011] In a possible embodiment, the cross-section of the transition portion along the second direction is rectangular, the second direction is perpendicular to the first direction, the length of the cross-section of the transition portion along the second direction is D, the range of D is [L, 8L], and the width of the cross-section of the transition portion along the second direction is W, and the range of W is [L, 8L].
[0012] In a second aspect, the present application further provides a battery, comprising:
[0013] case;
[0014] A cover plate assembly, which is covered on the shell and forms a receiving space;
[0015] A battery cell is contained in the containing space; and
[0016] The above-mentioned adapter is accommodated in the accommodating space, and the adapter is electrically connected between the pole ear of the battery cell and the pole of the cover plate assembly.
[0017] In a possible implementation manner, the second connection portion of the adapter is connected to the tab of the battery cell by induction welding.
[0018] In a third aspect, the present application further provides a battery device, comprising:
[0019] The battery mentioned above.
[0020] In a fourth aspect, the present application further provides an electrical device, including:
[0021] The above-mentioned battery device or the above-mentioned battery.
[0022] The adapter, battery, battery device and electrical equipment provided by the present application are connected and arranged in sequence along the first direction through the first connecting part, the transition part and the second connecting part, and the transition part can be bent so that the second connecting part can be bent relative to the first connecting part. When the second connecting part is connected to the pole ear of the battery cell, the second connecting part can be bent relative to the first connecting part through the transition part, so that the position where the second connecting part and the pole ear of the battery cell are welded is far away from other parts of the battery, reducing the influence of the heat generated during the welding process of the second connecting part and the pole ear of the battery cell on the parts around the second connecting part, which is conducive to improving the welding yield of the adapter and the battery cell, and improving the production yield of the battery. After the second connecting part is connected to the pole ear of the battery cell, the second connecting part can be restored so that the first connecting part, the transition part and the second connecting part are still arranged in sequence along the first direction. Thus, under the premise of reducing the influence of the second connecting part and the pole ear of the battery cell on the parts around the adapter during the welding process, the space occupied by the second connecting part during the connection process with the pole ear of the battery cell can be reduced, so that the connection between the parts around the second connecting part can be tighter, which is conducive to improving the space utilization of the structure formed by the adapter. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some implementation methods provided by the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0024] Figure 1 This is a partial assembly structure diagram of a battery provided in one embodiment of the present application;
[0025] Figure 2 is a partial exploded structural diagram of a battery provided in one embodiment of the present application;
[0026] Figure 3 is a structural diagram of an adapter provided in one embodiment of the present application;
[0027] Figure 4 is a front view of an adapter provided in one embodiment of the present application;
[0028] Figure 5 is a front view of another adapter provided in one embodiment of the present application;
[0029] Figure 6 is a cross-sectional view of a transition portion provided by an embodiment of the present application;
[0030] Figure 7 It is a cross-sectional view of another transition portion provided in one embodiment of the present application. DETAILED DESCRIPTION
[0031] The technical solution of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described implementation methods are only part of the implementation methods of the present application, rather than all the implementation methods. Based on the implementation methods in the present application, all other implementation methods obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.
[0032] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The directional terms mentioned in the description of the present application, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "top", "side", "bottom", "top wall", "side wall", "bottom wall", "inner side wall", "outer side wall", "length direction", "width direction", "height direction", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, 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 therefore cannot be understood as a limitation on the present application. In the description of the present application, for example, "first", "second", "third", "fourth", etc., are only used to distinguish the objects described and do not have any order or technical meaning. In the description of the present application, the "connection" and "connection" involved, if not otherwise specified, include direct connection (connection) and indirect connection (connection).
[0033] The present application provides an electric device, the electric device includes a battery device, and the battery device is used to provide electric energy to the electric device so that the electric device can work. The electric device includes but is not limited to traffic equipment, transportation equipment, engineering equipment, household equipment, etc., and the present application does not limit this.
[0034] The present application also provides a battery device, the battery device includes a battery, and the battery is used to form the main body of the battery device. The battery device may also include a distribution box and other structures, which are not limited in the present application.
[0035] See also Figure 1 and Figure 2 , Figure 1is a partial assembly structure diagram of a battery provided in one embodiment of the present application, Figure 2 It is a partial exploded structure diagram of a battery provided in one embodiment of the present application.
[0036] The present application also provides a battery 100, which includes an adapter 10, a top cover assembly 30, a battery cell 50 and a shell (not shown). The top cover assembly 30 is covered on the shell, and the top cover assembly 30 and the shell form a receiving space, and the adapter 10 and the battery cell 50 are received in the receiving space formed by the top cover assembly 30 and the shell. The adapter 10 is connected between the pole of the top cover assembly 30 and the electrical pole ear 51, so that the pole of the top cover assembly 30 is electrically connected to the pole ear 51 of the battery cell 50, so that the electrical energy of the battery cell 50 can be conducted to the outside of the battery 100 through the top cover assembly 30.
[0037] However, in the battery provided by the prior art, the adapter is connected by ultrasonic and laser welding, the process is complicated, and the assembly efficiency between the adapter and the tab of the battery cell is low. Moreover, since the adapter and the tab of the battery cell are mostly connected by ultrasonic and laser welding, ultrasonic and laser welding will generate a lot of heat, which will affect the parts around the adapter. During the welding process, solder splashing, welding deviation, welding holes and other phenomena are likely to occur, which may easily cause the adapter to deform or degenerate, thereby affecting the overcurrent performance of the adapter and the low welding yield.
[0038] To solve the technical problems caused by the above-mentioned prior art. The present application further provides a battery 100, in which the adapter 10 and the pole lug 51 of the battery cell 50 are connected by induction welding, and the adapter 10 and the pole lug 51 of the battery cell 50 can be connected after induction heating and pressure fusion. During the connection process between the adapter 10 and the pole lug 51 of the battery cell 50, induction heating and pressure fusion can be carried out simultaneously. During the induction welding process between the adapter 10 and the pole lug 51 of the battery cell 50, the adapter 10 and the pole lug 51 of the battery cell 50 are first heated by an induction coil so that the adapter 10 and the pole lug 51 of the battery cell 50 are softened or in a molten state. Then, pressure is applied to the adapter 10 and the pole lug 51 of the battery cell 50 so that the adapter 10 and the pole lug 51 of the battery cell 50 are atomically fused, thereby realizing the induction welding connection between the adapter 10 and the pole lug 51 of the battery cell 50.
[0039] The battery 100 provided in the present application forms a connection between the adapter 10 and the tab 51 of the battery cell 50 by induction pressure welding. On the one hand, the induction heating and pressure fusion between the adapter 10 and the tab 51 of the battery cell 50 can be carried out simultaneously, which can simplify the process of the adapter 10, improve the process rhythm of the adapter 10, and thus improve the processing efficiency of the adapter 10. On the other hand, compared with ultrasonic and laser welding to form an electrical connection between the adapter 10 and the tab 51 of the battery cell 50, the electrical connection between the adapter 10 and the tab 51 of the battery cell 50 is formed by induction pressure welding, and the contact area between the adapter 10 and the tab 51 of the battery cell 50 is larger. On the premise of ensuring the overcurrent performance of the adapter 10 and the tab 51 of the battery cell 50, the overall size of the adapter 10 can be made smaller, which is conducive to the miniaturization of the adapter 10. On the third aspect, by induction welding, an electrical connection is formed between the adapter 10 and the tab 51 of the battery cell 50, avoiding the use of ultrasonic and laser welding, which can reduce the ambient temperature when the adapter 10 and the tab 51 are electrically connected, and will not cause oxidation, deformation and degeneration of the adapter 10 and the tab 51 of the battery cell 50. On the fourth aspect, by induction welding, an electrical connection is formed between the adapter 10 and the tab 51 of the battery cell 50, which can also reduce the occurrence of solder spatter, welding deviation, welding holes and the like, which is conducive to improving the assembly quality between the adapter 10 and the tab 51 of the battery cell 50, and thus improving the assembly yield of the battery 100. On the fifth aspect, by induction welding, an electrical connection is formed between the adapter 10 and the tab 51 of the battery cell 50, the operation of the welding equipment is simple, and the fixture of the welding tooling is simple, which is conducive to improving the degree of automated assembly of the battery 100.
[0040] However, in the adapter provided by the prior art, the adapter is an important conductive part inside the battery, and is used to electrically connect the pole of the cover plate assembly and the pole ear of the battery cell, so that the electric energy of the battery cell can be conducted to the pole. Since the connection between the adapter and the pole ear of the battery cell is mostly formed by ultrasonic and laser welding, which will generate a lot of heat, in order to ensure that the welding process will not affect the parts around the adapter, there is usually a large gap between the adapter and the parts around it, which leads to a large space occupied by the structure formed by the adapter and a low space utilization rate.
[0041] In order to solve the technical problems existing in the above-mentioned prior art, the present application provides an adapter 10, which is beneficial to improving the space utilization of the battery 100 formed by the adapter 10, and further improving the power density of the battery 100 formed by the adapter 10.
[0042] The adapter 10 provided in the present application is described in detail below with reference to the accompanying drawings.
[0043] See also Figure 1 , Figure 3 and Figure 4 , Figure 3 is a structural diagram of a transfer component provided in one embodiment of the present application. Figure 4 It is a front view of an adapter provided in one embodiment of the present application.
[0044] The adapter 10 provided in this embodiment is an integrally formed structure, and the adapter 10 includes a first connection portion 11, a transition portion 12, and a second connection portion 13 that are sequentially connected and arranged along a first direction. The transition portion 12 can be bent, and the bending resistance of the transition portion 12 is less than that of the first connection portion 11. The bending resistance of the transition portion 12 is less than that of the second connection portion 13, so that the second connection portion 13 can be bent relative to the first connection portion 11. The first connection portion 11 is used to connect to the pole of the cover plate assembly, and the second connection portion 13 is used to connect to the pole ear 51 of the battery cell 50. Among them, the first direction is the length direction of the adapter 10, that is, as shown in FIG. Figure 3 The X-axis direction is shown.
[0045] The adapter 10 provided in the present application is connected in sequence along the first direction by the first connecting portion 11, the transition portion 12 and the second connecting portion 13. The transition portion 12 can be bent so that the second connecting portion 13 can be bent relative to the first connecting portion. Moreover, the bending resistance of the transition portion 12 is less than that of the first connecting portion 11, and the bending resistance of the transition portion 12 is less than that of the second connecting portion 13. When the first connecting portion 11 and the second connecting portion 13 are relatively bent, only the transition portion 12 is bent and deformed, and the first connecting portion 11 and the second connecting portion 13 themselves will not bend. When the second connection portion 13 is welded to the tab 51 of the battery cell 50, the second connection portion 13 can be bent relative to the first connection portion 11 through the transition portion 12, so that the position where the second connection portion 13 and the tab of the battery cell 50 are welded is far away from other components of the battery 100, thereby reducing the influence of the heat generated during the welding process of the second connection portion 13 and the tab 51 of the battery cell 50 on the components around the second connection portion 13, which is conducive to improving the welding yield of the adapter 10 and the battery cell 50, and improving the production yield of the battery 100. After the second connection portion 13 is connected to the tab 51 of the battery cell 50, the second connection portion 13 can be restored so that the first connection portion 11, the transition portion 12 and the second connection portion 13 are still arranged in sequence along the first direction. Therefore, under the premise of reducing the impact on the components around the adapter 10 during the welding process of the second connecting part 13 and the pole lug 51 of the battery cell 50, the space occupied during the connection between the second connecting part 13 and the pole lug 51 of the battery cell 50 can be reduced, so that the connection between the components around the second connecting part 13 can be tighter, which is beneficial to improving the space utilization of the structure formed by the adapter 10.
[0046] It can be understood that in some other embodiments, the adapter 10 can be formed by assembling and connecting the separate first connecting portion 11, the transition portion 12, and the second connecting portion 13 in sequence, and the present application does not limit this.
[0047] See also Figure 3 and Figure 4 In one embodiment, the second connection portion 13 can be bent relative to the first connection portion 11 in a plane different from the first connection portion 11 through the transition portion 12. In other words, the second connection portion 13 can be bent relative to the first connection portion 11 in a plane different from the first direction and the second direction through the transition portion 12. The second direction is the width direction of the adapter 10, that is, Figure 3 The direction of the Y axis is shown.
[0048] The adapter 10 provided in the present application can be bent relative to the first connection portion 11 in a plane different from the first connection portion 11 through the transition portion 12 via the second connection portion 13. When the second connection portion 13 is connected to the tab 51 of the battery cell 50, the second connection portion 13 can be bent relative to the first connection portion 11 to reduce the influence of the heat generated during the welding process of the second connection portion 13 and the tab 51 of the battery cell 50 on the components around the second connection portion 13. After the second connection portion 13 is connected to the tab 51 of the battery cell 50, the second connection portion 13 can be restored so that the first connection portion 11, the transition portion 12 and the second connection portion 13 are still arranged in sequence along the first direction. Therefore, under the premise of reducing the impact on the components around the adapter 10 during the welding process of the second connecting part 13 and the pole lug 51 of the battery cell 50, the space occupied during the connection between the second connecting part 13 and the pole lug 51 of the battery cell 50 can be reduced, so that the connection between the components around the second connecting part 13 can be tighter, which is beneficial to improving the space utilization of the structure formed by the adapter 10.
[0049] See also Figure 1 , Figure 3 and Figure 4 In one embodiment, the adapter 10 has a first notch 14, and the first notch 14 is used to form a transition portion 12, and the transition portion 12 is arranged at the edge of the first connection portion 11 and the edge of the second connection portion 13. The end surface of the first connection portion 11 close to the second connection portion 13, the peripheral side surface of the transition portion 12, and the end surface of the second connection portion 13 close to the first connection portion 11 are surrounded to form the first notch 14. The opening of the first notch 14 is located on the peripheral side wall of the adapter 10 along the second direction, and the second direction is the width direction of the adapter 10.
[0050] The adapter 10 provided in the present application has a first notch 14 for forming a transition portion 12, so that along the second direction, the cross-sectional area of the transition portion 12 is smaller than the cross-sectional area of the first connection portion 11, and the cross-sectional area of the transition portion 12 is smaller than the cross-sectional area of the second connection portion 13. On the one hand, the cross-sectional area of the transition portion 12 in the second direction is smaller than that of the first connection portion 11 and the second connection portion 13, so that the flexibility and deformability of the transition portion 12 are better, so that the second connection portion 13 is bent relative to the first connection portion 11, thereby improving the assembly efficiency of the second connection portion 13 of the adapter 10 and the tab 51 of the battery cell 50. On the other hand, the first notch 14 is provided on the adapter 10, so as to reduce the material consumption of the adapter 10, which is conducive to reducing the cost and weight of the adapter 10.
[0051] In this embodiment, during the process of installing the adapter 10 in the battery 100, the first connection portion 11 of the adapter 10 is first connected to the pole of the cover plate. Then, the second connection portion 13 is rotated relative to the first connection portion 11 around the first direction at the position of the transition portion 12, and the second connection portion 13 is arranged perpendicular to the first connection portion 11. Then, the pole tab 51 of the battery cell 50 is induction welded with the second connection portion 13 to electrically connect the pole tab 51 of the battery cell 50 and the second connection portion 13. Finally, the pole tab 51 and the second connection portion 13 of the battery cell 50 are rotated relative to the first connection portion 11 around the first direction at the position of the transition portion 12 to restore, and the first connection portion 11, the transition portion 12 and the second connection portion 13 are arranged in sequence along the first direction, so that the adapter 10 is installed in the battery 100.
[0052] See also Figure 1 and Figure 5 , Figure 5 It is a front view of another adapter provided in one embodiment of the present application.
[0053] In another embodiment, the adapter 10 has a first notch 14 and a second notch 15, and the first notch 14 and the second notch 15 are used to form a transition portion 12, and the transition portion 12 is arranged at the center of the first connection portion 11 and the center of the second connection portion 13. The first notch 14 is formed by surrounding a portion of the end surface of the first connection portion 11 close to the second connection portion 13, a portion of the peripheral side surface of the transition portion 12, and a portion of the end surface of the second connection portion 13 close to the first connection portion 11, and the second notch 15 is formed by surrounding a portion of the end surface of the first connection portion 11 close to the second connection portion 13, a portion of the peripheral side surface of the transition portion 12, and a portion of the end surface of the second connection portion 13 close to the first connection portion 11. The opening of the first notch 14 is located on the peripheral side wall of the adapter 10 along the second direction, and the opening of the second notch 15 is located on the peripheral side wall of the adapter 10 along the second direction. The opening of the first notch 14 and the opening of the second notch 15 are arranged opposite to each other along the second direction, and the second direction is the width direction of the adapter 10.
[0054] The adapter 10 provided in the present application has a first notch 14 and a second notch 15 for forming a transition portion 12, so that along the second direction, the cross-sectional area of the transition portion 12 is smaller than the cross-sectional area of the first connection portion 11, and the cross-sectional area of the transition portion 12 is smaller than the cross-sectional area of the second connection portion 13. On the one hand, the cross-sectional area of the transition portion 12 in the second direction is smaller than the first connection portion 11 and the second connection portion 13, so that the flexibility and deformability of the transition portion 12 are better, so that the second connection portion 13 is bent relative to the first connection portion 11, thereby improving the assembly efficiency of the second connection portion 13 of the adapter 10 and the tab 51 of the battery cell 50. On the other hand, the first notch 14 and the second notch 15 are provided on the adapter 10, so as to reduce the material consumption of the adapter 10, which is conducive to reducing the cost and weight of the adapter 10.
[0055] In this embodiment, during the process of installing the adapter 10 in the battery 100, the first connection portion 11 of the adapter 10 is first connected to the pole of the cover plate. Then, the second connection portion 13 is rotated relative to the first connection portion 11 around the second direction at the position of the transition portion 12, and the second connection portion 13 is arranged perpendicular to the first connection portion 11. Then, the pole tab 51 of the battery cell 50 is induction welded with the second connection portion 13 to electrically connect the pole tab 51 of the battery cell 50 and the second connection portion 13. Finally, the pole tab 51 and the second connection portion 13 of the battery cell 50 are rotated relative to the first connection portion 11 around the second direction at the position of the transition portion 12 to restore, and the first connection portion 11, the transition portion 12 and the second connection portion 13 are arranged in sequence along the first direction, so that the adapter 10 is installed in the battery 100.
[0056] See also Figure 1 , Figure 4 and Figure 5 In one embodiment, the extension length of the second connection portion 13 along the first direction is G, that is, the extension length of the second connection portion 13 along the length of the adapter 10 is G, and the range of G is [5,100] mm. By limiting the extension length of the second connection portion 13 along the first direction to be greater than 5 mm, the second connection portion 13 is prevented from being too small and the contact area between the tab 51 of the battery cell 50 is small, so as to ensure the welding area between the second connection portion 13 and the tab 51 of the battery cell 50, and further ensure the current flow performance of the adapter 10 between the battery cell 50 and the cover plate assembly. By limiting the extension length of the second connection portion 13 along the first direction to be less than 100 mm, the second connection portion 13 is prevented from being too large and occupying the overall space of the battery 100, so as to make the overall volume of the battery 100 smaller, which is beneficial to improve the space utilization rate of the battery 100 and the power density of the battery 100.
[0057] It should be understood that, under the premise of ensuring the flow performance of the adapter 10 , the extension length G of the second connection portion 13 along the first direction can be designed to be as small as possible.
[0058] See also Figure 1 , Figure 4 and Figure 5 In one embodiment, the extension length of the transition portion 12 along the first direction is L, that is, the length of the transition portion 12 along the extension direction of the length of the adapter 10 is L, and the range of L is [0.1G, 0.5G], that is, the range of L is [0.5, 50] mm. By limiting the length of the transition portion 12 along the first direction to be greater than 0.5 mm, the bending performance of the transition portion 12 is prevented from being affected by the transition portion 12 being too short, thereby ensuring the bending performance of the second connection portion 13 relative to the first connection portion 11. By limiting the length of the transition portion 12 along the first direction to be less than 50 mm, on the one hand, it is possible to prevent the phenomenon of excessive resistance and excessive heat generation due to the transition portion 12 being too long, thereby ensuring the overcurrent performance between the first connection portion 11 and the second connection portion 13. On the other hand, it is possible to prevent the transition portion 12 from being too long and occupying the overall space of the battery 100, so that the overall volume of the battery 100 is smaller, which is beneficial to improving the space utilization rate of the battery 100 and the power density of the battery 100.
[0059] It should be understood that, under the premise of ensuring the flow performance and bending performance of the adapter 10 , the extension length L of the transition portion 12 along the first direction can be designed to be as small as possible.
[0060] See also Figure 4 , Figure 5 and Figure 6 , Figure 6 It is a cross-sectional view of a transition portion provided in one embodiment of the present application. In one embodiment, while ensuring that the cross section of the transition portion 12 along the second direction is circular, the second direction is perpendicular to the first direction, and the radius of the cross section of the transition portion 12 is R, and the range of R is [L, 5L], that is, the range of R is [0.5, 250] mm. By limiting the radius of the cross section of the transition portion 12 to be greater than 0.5 mm, that is, limiting the minimum value of the area of the cross section of the transition portion 12, it is possible to prevent the phenomenon of excessive resistance and excessive heat generation due to the transition portion 12 being too thin, thereby ensuring the flow performance between the first connection portion 11 and the second connection portion 13. By limiting the radius of the cross section of the transition portion 12 to be less than 250 mm, that is, limiting the maximum value of the area of the cross section of the transition portion 12, it is possible to prevent the bending performance of the transition portion 12 from being affected due to the transition portion 12 being too thick, thereby ensuring the bending performance of the second connection portion 13 relative to the first connection portion 11.
[0061] It should be understood that, under the premise of ensuring the flow performance and flow resistance of the adapter 10, the value of the radius R of the cross section of the transition portion 12 along the second direction can be designed to be as small as possible.
[0062] See also Figure 4 , Figure 5 and Figure 7 , Figure 7 It is a cross-sectional view of another transition portion provided in one embodiment of the present application. In another embodiment, the cross section of the transition portion 12 along the second direction is rectangular, the second direction is perpendicular to the first direction, the length of the cross section of the transition portion 12 along the second direction is D, and the range of D is [L, 8L], that is, the range of D is [0.5, 400] mm. The width of the cross section of the transition portion 12 along the second direction is W, and the range of W is [L, 8L], that is, the range of W is [0.5, 400] mm. By limiting the length of the cross section of the transition portion 12 to be greater than 0.5 mm, and the width of the cross section of the transition portion 12 to be greater than 0.5 mm, that is, limiting the minimum value of the area of the cross section of the transition portion 12, it is possible to prevent the phenomenon of excessive resistance and excessive heat generation due to the transition portion 12 being too thin, thereby ensuring the overcurrent performance between the first connection portion 11 and the second connection portion 13. By limiting the minimum size of the cross section of the transition portion 12 to be greater than 400 mm and the width of the cross section of the transition portion 12 to be less than 400 mm, that is, limiting the maximum area of the cross section of the transition portion 12, the bending performance of the transition portion 12 can be prevented from being affected due to the transition portion 12 being too thick, thereby ensuring the bending performance of the second connection portion 13 relative to the first connection portion 11.
[0063] It should be understood that, under the premise of ensuring the flow performance and flow resistance of the adapter 10, the length D and width W of the cross section of the transition portion 12 along the second direction can be designed to be as small as possible.
[0064] The above are some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.
Claims
1. A transfer component, characterized in that: Used to electrically connect a battery cover assembly and a battery cell, the adapter includes a first connecting portion, a transition portion, and a second connecting portion that are sequentially connected along a first direction, the transition portion can be bent so that the second connecting portion can be bent relative to the first connecting portion, the first connecting portion is used to connect to the pole of the cover assembly, and the second connecting portion is used to connect to the pole ear of the battery cell.
2. The adapter according to claim 1, characterized in that: The second connection portion can be bent in a plane different from that of the first connection portion.
3. The adapter according to claim 1, characterized in that: The adapter has a first notch for forming the transition portion, and the first notch is formed by the end surface of the first connection portion close to the second connection portion, the peripheral side surface of the transition portion, and the end surface of the second connection portion close to the first connection portion; the opening of the first notch is located on the peripheral side wall of the adapter along the second direction, and the second direction is the width direction of the adapter.
4. The adapter according to claim 1, characterized in that: The adapter has a first notch and a second notch for forming the transition part, and the first notch is formed by part of the end face of the first connection part close to the second connection part, part of the peripheral side face of the transition part, and part of the end face of the second connection part close to the first connection part, and the second notch is formed by part of the end face of the first connection part close to the second connection part, part of the peripheral side face of the transition part, and part of the end face of the second connection part close to the first connection part; the opening of the first notch is located on the peripheral side wall of the adapter along the second direction, and the opening of the second notch is located on the peripheral side wall of the adapter along the second direction, and the opening of the first notch and the opening of the second notch are arranged opposite to each other along the second direction, and the second direction is the width direction of the adapter.
5. The adapter according to claim 1, characterized in that: An extension length of the second connection portion along the first direction is G, and the range of G is [5, 100] mm.
6. The adapter according to claim 5, characterized in that: An extension length of the transition portion along the first direction is L, and the range of L is [0.1G, 0.5G].
7. The adapter according to claim 6, characterized in that: The cross section of the transition portion along the second direction is circular, the second direction is perpendicular to the first direction, the radius of the cross section of the transition portion is R, and the range of R is [L, 5L].
8. The adapter according to claim 6, characterized in that: The cross-section of the transition portion along the second direction is rectangular, the second direction is perpendicular to the first direction, the length of the cross-section of the transition portion along the second direction is D, the range of D is [L, 8L], and the width of the cross-section of the transition portion along the second direction is W, the range of W is [L, 8L].
9. A battery, characterized in that: include: case; A cover plate assembly, which is covered on the shell and forms a receiving space; A battery cell, contained in the containing space; as well as The adapter as described in any one of claims 1 to 8, wherein the adapter is accommodated in the accommodating space, and the adapter is electrically connected between the pole ear of the battery cell and the pole of the cover plate assembly.
10. The battery according to claim 9, characterized in that The second connection portion of the adapter is connected to the tab of the battery cell by induction welding.
11. A battery device, characterized in that: include: A battery as claimed in any one of claims 9 or 10.
12. An electrical device, characterized in that: include: A battery device as claimed in claim 11 or a battery as claimed in any one of claims 9 or 10.