Switching assembly, battery and power utilization device

Abstract

The invention discloses an adapter assembly, which comprises an adapter piece and a coil, and is characterized in that the adapter piece is used for connecting a pole and a tab; the coil sleeves at least part of the adapter, the coil is a closed loop formed by connecting a plurality of continuous single circles end to end, and the coil and the adapter are insulated from each other. Therefore, according to the switching assembly, the coil is arranged on the switching piece, when the battery is in large current, the magnetic field on the switching piece is increased, the magnetic field passing through the coil is changed, the coil can hinder current increase and delay the current increase speed due to impedance, and therefore the impact of the current on the battery can be relieved; moreover, current can be generated in the coil due to increase of the magnetic field, the coil can generate heat to heat the connecting piece, the temperature rise fusing process of the adapter can be accelerated, and due to the auxiliary effect of the coil on fusing of the adapter, the cross section of the fusing part of the adapter can be increased as much as possible when the adapter is normally used.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a switching assembly, a battery and an electrical device. Background Art

[0002] In order to improve the performance, safety and reliability of the battery in the prior art, an adapter is usually provided to connect the pole and the lug. In order to ensure the safety of the battery, when the working current is abnormal and exceeds the preset value, it is necessary to make the internal resistance of the adapter as large as possible and generate as much heat as possible so that the adapter can melt as quickly as possible and cut off the circuit. Therefore, the adapter is usually provided with a fuse part. The flow area of ​​the fuse part is smaller than the flow area of ​​other parts and the resistance is large. When the battery is short-circuited, its current increases, and the fuse part can generate a large amount of heat to melt the adapter and then cut off the circuit. However, as the requirements for battery energy conversion efficiency continue to increase, the internal resistance of the battery is required to be as small as possible, which is in conflict with the large resistance of the fuse part, affecting the safety performance of the battery.

[0003] Therefore, how to balance the high energy conversion rate and safety performance of the battery is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a switching assembly that can solve the problems of high energy conversion rate and safety performance of batteries.

[0005] A switching assembly, comprising:

[0006] Adapter, used to connect the pole and the lug;

[0007] The coil is sleeved on at least a portion of the adapter. The coil is a closed loop formed by multiple continuous single turns connected end to end. The coil and the adapter are insulated from each other.

[0008] Optionally, in the above-mentioned adapter assembly, a cavity is formed inside the coil to allow part of the structure of the adapter to pass through, and the angle between the axial direction of the cavity and the current direction on the adapter is greater than or equal to 0° and less than 90°.

[0009] Optionally, in the above-mentioned adapter assembly, the adapter comprises a pole connecting portion, at least one fuse portion and a tab connecting portion sequentially connected along the first direction.

[0010] At least one of the fuse parts is connected between the pole connection part and the tab connection part, and along the second direction, the size of the fuse part is smaller than the size of at least one of the pole connection part and the tab connection part, the coil is sleeved on at least one of the fuse parts, and the second direction is within the plane where the fuse part is located, and is perpendicular to the first direction.

[0011] Optionally, in the above-mentioned adapter assembly, the fuse parts include at least two, an opening is provided between two adjacent fuse parts, and the coil is at least sleeved on the fuse part with the smallest size along the second direction.

[0012] Optionally, in the above-mentioned adapter assembly, two adjacent single-turn layers in the coil are insulated.

[0013] Optionally, the adapter assembly further includes an insulating bracket, which is arranged between the coil and the adapter to prevent the coil from contacting the adapter.

[0014] Optionally, in the above-mentioned adapter assembly, a continuous accommodating groove for accommodating a single coil is provided on the contact surface between the insulating bracket and the coil.

[0015] Optionally, in the above-mentioned adapter assembly, the insulating bracket includes:

[0016] a first portion, wherein the first portion is provided with a through hole, and a portion of the structure of the adapter is passed through the through hole;

[0017] a second portion, sleeved on the outer side of the first portion, the coil being wound on the outer side of the second portion;

[0018] The third part has two ends respectively connected to a side of the hole wall of the first part facing away from the adapter and a side of the second part facing away from the coil.

[0019] Optionally, in the above-mentioned adapter assembly, the side of the second part for winding the coil is provided with a receiving groove for accommodating a single and continuous coil;

[0020] The dimension of the accommodating groove along the axial direction of the coil is the same as the diameter of the wire body of the coil.

[0021] A battery comprises a pole, a tab and the above-mentioned adapter assembly, wherein the adapter assembly connects the pole and the tab.

[0022] An electrical device comprises the above-mentioned battery.

[0023] It can be seen from the above technical solution that the present invention arranges a coil on the adapter. When the battery is at a large current, the magnetic field on the adapter increases, resulting in a change in the magnetic field passing through the coil. The coil can hinder the increase of the current due to its impedance, slow down the rate of increase of the current, and thus reduce the impact of the current on the battery; and the increase in the magnetic field can generate current in the coil, so that the coil generates heat to heat the connecting piece, which can accelerate the temperature rise and melting process of the adapter. Due to the auxiliary effect of the coil on the melting of the adapter, the cross-sectional area of ​​the melting part of the adapter can be increased as much as possible during normal use, thereby ensuring the overcurrent of the battery in a normal state. When the battery is short-circuited, the coil can accelerate the melting to ensure safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 An exploded view of a battery provided by an embodiment of the present invention;

[0026] Figure 2 Schematic diagram of the structure of the adapter assembly provided in an embodiment of the present invention Figure 1 ;

[0027] Figure 3 Schematic diagram of the structure of the adapter assembly provided in an embodiment of the present invention Figure 2 ;

[0028] Figure 4 Schematic diagram of the structure of the adapter assembly provided in an embodiment of the present invention Figure 3 ;

[0029] Figure 5 Schematic diagram of the structure of the adapter assembly provided in an embodiment of the present invention Figure 4 ;

[0030] Figure 6 A schematic structural diagram of a coil provided in an embodiment of the present invention;

[0031] Figure 7 A schematic structural diagram of an insulating bracket provided in an embodiment of the present invention.

[0032] in:

[0033] 1. Adapter; 11. Pole connection; 12. Fuse; 121. Opening; 13. Tab connection;

[0034] 2. Pole; 3. Ear; 4. Coil; 41. Cavity;

[0035] 5. Insulating bracket; 51. First portion; 511. Through hole; 52. Second portion; 521. Accommodating groove; 53. Third portion;

[0036] 6. Battery cell; 7. Housing; 8. Cover. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In the description of the invention, it should be noted that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] like Figures 1 to 7 As shown, an embodiment of the present invention provides a switching component that can balance the high energy conversion rate and safety performance of the battery.

[0040] First, the adapter assembly includes an adapter 1 and a coil 4, wherein the adapter 1 is used to connect the pole 2 and the pole ear 3; the coil 4 is sleeved on at least part of the adapter 1, and the coil 4 is a closed loop formed by multiple continuous single turns connected end to end. The coil 4 and the adapter 1 are insulated from each other to prevent the coil 4 from being connected to the circuit, making the coil 4 an independent structural component. The insulation method includes but is not limited to coating the coil 4 with an insulating coating or an insulating sheath, or the coil 4 is not insulated, and a gap is left between the coil 4 and the adapter 1. It should be noted that when the coil 4 is coated with an insulating coating, the thickness of the insulating layer is greater than 3μm. In order to avoid problems such as current interference between the adapter 1 and the coil 4, effective insulation measures are taken between the two to ensure the safety and stability of the adapter assembly.

[0041] It can be seen that the embodiment of the present invention provides a coil 4 on the adapter 1. When the battery is operating at a relatively high current, the magnetic field on the adapter 1 increases, causing the magnetic field passing through the coil 4 to change. The coil 4 can hinder the increase in current due to its impedance, slowing down the rate of increase of the current, thereby reducing the impact of the current on the battery. Furthermore, the increase in the magnetic field can generate current in the coil 4, causing the coil 4 to generate heat to heat the connecting piece, thereby accelerating the temperature rise and melting process of the adapter 1. Due to the auxiliary effect of the coil 4 on the melting of the adapter 1, the cross-section of the melting portion 12 of the adapter 1 can be increased as much as possible during normal use.

[0042] During specific implementation, a cavity 41 is formed inside the coil 4 to allow part of the structure of the adapter 1 to pass through. The angle between the axial direction of the cavity 41 and the direction of the current on the adapter 1 is greater than or equal to 0° and less than 90°. The angle between the axial direction of the cavity 41 and the direction of the current on the adapter 1 is set. The range setting of this angle greater than or equal to 0° and less than 90° has important physical significance. When the angle is 0°, the direction of current flow in the adapter 1 is completely consistent with the axial direction of the cavity 41. At this time, the distribution of the magnetic field is most regular, which can minimize energy loss and electromagnetic interference. As the angle gradually increases, but is always less than 90°, although the magnetic field distribution will change to a certain extent, the basic performance of the adapter assembly can still be guaranteed, and in some specific application scenarios, the electromagnetic characteristics can be flexibly controlled by adjusting this angle. It should be noted that the internal contour of the coil 4 includes a circle, but is not limited to a circular structure. It can also be an ellipse, square or other irregular shapes.

[0043] In specific implementation, the adapter 1 includes a pole connection part 11, at least one fuse part 12 and a tab connection part 13 connected in sequence along a first direction, wherein at least one fuse part 12 is connected between the pole connection part 11 and the tab connection part 13, and along the second direction, the size of the fuse part 12 is smaller than the size of at least one of the pole connection part 11 and the tab connection part 13, that is, the fuse part 12 on the adapter 1 is narrowed relative to the pole connection part 11 or the tab connection part 13, and the coil 4 is sleeved on the fuse part 12: on the one hand, the adapter 1 itself can generate heat, and on the other hand, the coil 4 can be heated. The combined effect of the two enables the fuse part 12 of the adapter 1 to respond to the fuse in time. The coil 4 is sleeved on at least one fuse part 12. The second direction is within the plane where the fuse part 12 is located and is perpendicular to the first direction. This ensures that the coil 4 is set at the narrower cross-sectional area of ​​the adapter 1. The narrower area has a larger resistance and generates more heat. At the same time, the increase in the magnetic field generates current in the coil 4, causing the coil 4 to generate heat and heat the narrow area of ​​the adapter 1, which can accelerate the temperature rise and melting of the adapter 1. One, two or more fuse parts 12 can be set. Figure 2As shown, when one fuse part 12 is provided, the coil 4 is sleeved on the fuse part 12; when two or more fuse parts 12 are provided, each fuse part 12 can be provided one-to-one; or, it can be provided only on some fuse parts 12. It should be noted that the schematic diagram of the first direction and the second direction is shown in FIG. Figure 2 The second direction is the direction of current flow.

[0044] In a specific implementation, at least two fuse sections 12 are included, with an opening 121 defined between adjacent fuse sections 12. The coil 4 is at least mounted on the fuse section 12 with the smallest dimension along the second direction. When a coil 4 is mounted on one or a portion of the multiple fuse sections 12, the heat generated by the coil 4 heats the fuse section 12 with the coil 4, causing it to melt quickly. After melting, this accelerates the melting speed of other fuse sections 12 not equipped with the coil 4. Placing the coil 4 on the narrowest fuse section 12 provides the best effect. After the coil 4 melts the narrowest fuse section 12, the overall internal resistance increases, accelerating the melting of other fuse sections 12.

[0045] When a coil 4 is provided on each fuse part 12, each fuse part 12 can be heated and melted. Figure 3 As shown, taking the setting of three fuse parts 12 as an example, the three fuse parts 12 are provided with coils 4 one to one; Figure 4 As shown, one of the three fuse parts 12 is provided with a coil 4 .

[0046] In specific implementations, insulation is provided between adjacent single-turn layers in coil 4. During coil 4 manufacturing, each single-turn layer is wound from a material with excellent electrical conductivity. However, if adjacent single-turn layers are not effectively insulated, current short circuits can easily occur, leading to a series of serious problems. In the worst case, this can lead to decreased equipment performance, impacting normal operation; in the worst case, it can cause safety incidents such as fires and explosions, posing a significant threat to human life and property. To achieve insulation between adjacent single-turn layers, the conductor used to wind coil 4 is initially selected to have an insulating coating. This coating effectively prevents current leakage between adjacent single-turn layers. The coating material typically has excellent insulation properties, high-temperature resistance, and chemical stability. In addition to the insulating coating on the conductor itself, additional insulating material is added between adjacent single-turn layers. This insulating material can be insulating paper, insulating film, or other materials. It is evenly laid between adjacent single-turn layers, further enhancing the insulation effect. During the laying process, the thickness and uniformity of the insulating material must be strictly controlled to ensure consistent insulation performance. In addition, gaps may be left between adjacent single turns in the coil 4 to ensure that there is no conduction in the middle of the coil 4, so that each single turn of the coil 4 can independently cut the magnetic field.

[0047] In a specific implementation, an insulating bracket 5 is also included. The insulating bracket 5 is arranged between the coil 4 and the adapter 1 to prevent the coil 4 from contacting the adapter 1. The insulating bracket 5 is partially arranged between the coil 4 and the adapter 1, and this part is used to support the coil 4 so that there is a gap between the coil 4 and the adapter 1 and insulation; or, the insulating bracket 5 is arranged as a whole between the adapter 1 and the coil 4, and the inner surface of the coil 4 and the adapter 1 are insulated by the insulating bracket 5. The insulating bracket 5 uses a low melting point material, such as PP, PET and other materials. After the battery cell 6 has a thermal runaway high temperature, the insulating bracket 5 melts and produces a protruding insulating burnt material on the adapter 1, which lifts the tab 3 to prevent it from overlapping the adapter 1 after it has melted. It should be noted that the insulating bracket 5 will be customized according to the specific shape and size of the coil 4 and the adapter 1, and fits tightly between the coil 4 and the adapter 1, ensuring effective isolation between the two without affecting the overall structural stability of the component. In addition, the insulating bracket 5 may have a certain degree of elasticity, so that it can play a buffering role when the device is subjected to vibration or impact, thereby further protecting the coil 4 and the adapter 1.

[0048] In specific implementation, a continuous receiving groove 521 for accommodating a single coil is provided on the contact surface between the insulating support 5 and the coil 4. When the coil 4 and the insulating support 5 are assembled, the single coil can be tightly embedded in the receiving groove 521. This not only ensures that the coil 4 does not shift or shake during operation, thereby avoiding short circuits or other failures caused by the movement of the coil 4, but also enhances the structural stability of the entire adapter assembly. From an electrical performance perspective, the receiving groove 521 helps optimize the insulation between the coil 4 and the insulating support 5. Because the single coil is accommodated in the groove, the contact area with the outside world is relatively reduced, reducing the risk of insulation performance degradation due to external factors (such as dust, moisture, etc.). At the same time, this design also makes the magnetic field generated by the coil 4 more concentrated and stable, improving the electromagnetic compatibility of the adapter assembly. In addition, the configuration of the insulating support 5 and its receiving groove 521 can simultaneously achieve insulation between the coil 4 and the adapter 1, as well as between the single coil of the coil 4.

[0049] In a specific implementation, the insulating bracket 5 includes a first part 51, a second part 52 and a third part 53, wherein the first part 51 is provided with a through hole 511, and part of the structure of the adapter 1 is passed through the through hole 511; the second part 52 is sleeved on the outside of the first part 51, and the coil 4 is wound on the outer surface of the second part 52; the two ends of the third part 53 are respectively connected to the side of the hole wall of the first part 51 facing away from the adapter 1 and the side of the second part 52 facing away from the coil 4. An insulating bracket 5 is provided between the coil 4 and the adapter 1 to fix the coil 4 and insulate the coil 4 from the adapter 1. A coil 4 accommodating groove 521 is provided on the outside of the insulating bracket 5, and a through hole 511 is provided in the middle for the adapter 1 to pass through. A supporting structure (third part 53) is provided between the inner side (first part 51) and the outer side (second part 52). The third part 53 includes but is not limited to Figure 7 As shown in the structure, there is a cavity 41 between the inner and outer structures except the supporting structure, which can reduce the heat absorption of the supporting structure.

[0050] In practice, the side of the second portion 52 used to wind the coil 4 is provided with a continuous receiving groove 521 for accommodating a single coil. The axial dimension of the receiving groove 521 is the same as the diameter of the coil 4. The single coil fits tightly into the receiving groove 521, which not only prevents the coil 4 from shifting or shaking during operation, thereby preventing short circuits or other malfunctions caused by coil movement, but also enhances the structural stability of the entire adapter assembly.

[0051] In specific implementation, coil 4 is usually set on the positive electrode adapter (that is, adapter 1 is positive electrode adapter 1), because for lithium-ion batteries, the positive electrode adapter is usually made of aluminum, which has a low melting point and can respond to melting in time.

[0052] An embodiment of the present application further provides a battery, comprising a pole 2, a tab 3 and the above-mentioned adapter assembly, wherein the adapter assembly connects the pole 2 and the tab 3.

[0053] It can be seen that the battery provided by the embodiment of the present invention, by arranging the coil 4 on the adapter 1, when the battery is at a large current, the magnetic field on the adapter 1 increases, resulting in a change in the magnetic field passing through the coil 4. The coil 4 can hinder the increase of the current due to its impedance, slow down the rate of increase of the current, and thus reduce the impact of the current on the battery; moreover, the increase in the magnetic field can generate current in the coil 4, so that the coil 4 generates heat to heat the connecting piece, which can accelerate the temperature rise and melting process of the adapter 1. Due to the auxiliary effect of the coil 4 on the melting of the adapter 1, the cross-section of the melting part 12 of the adapter 1 can be increased as much as possible during normal use.

[0054] In specific implementation, the battery also includes a cover plate 8, a shell 7, an insulating part and a battery cell 6. The cover plate 8 and the shell 7 separate the interior of the battery cell 6 from the outside world; the inside of the battery cell 6 connects the pole ear 3 of the battery cell 6 with the pole 2 of the cover plate 8 through the adapter 1; and the coil 4 is arranged at a narrow position in the second direction of the adapter 1.

[0055] An embodiment of the present application also provides an electrical device comprising the above-mentioned battery.

[0056] Since the electric device adopts the battery in the above embodiment, please refer to the above embodiment for the beneficial effects of the electric device.

[0057] The electrical device of the present invention is not particularly limited and may include, but is not limited to, laptop computers, pen-type computers, mobile computers, e-book players, portable phones, portable fax machines, portable copiers, portable printers, head-mounted stereo headphones, video recorders, LCD televisions, portable cleaners, portable CD players, mini-discs, transceivers, electronic notepads, calculators, memory cards, portable recorders, radios, backup power supplies, motors, cars, motorcycles, power-assisted bicycles, bicycles, lighting fixtures, toys, game consoles, clocks, power tools, flashlights, cameras, large household batteries and lithium-ion capacitors, etc.

[0058] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0059] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0060] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A switching assembly, characterized in that: include: An adapter (1) for connecting a pole (2) and a tab (3); The coil (4) is sleeved on at least a portion of the adapter (1); the coil (4) is a closed loop formed by a plurality of continuous single turns connected end to end; the coil (4) and the adapter (1) are insulated from each other.

2. The adapter assembly according to claim 1, wherein: A cavity (41) is formed inside the coil (4) to allow a partial structure of the adapter (1) to pass through, and an angle between the axial direction of the cavity (41) and the current direction on the adapter (1) is greater than or equal to 0° and less than 90°.

3. The adapter assembly according to claim 2, wherein: The adapter (1) comprises a pole connecting portion (11), at least one fuse portion (12), and a tab connecting portion (13) sequentially connected along a first direction. At least one of the fuse parts (12) is connected between the pole connection part (11) and the tab connection part (13), and along a second direction, the size of the fuse part (12) is smaller than the size of at least one of the pole connection part (11) and the tab connection part (13), and the coil (4) is sleeved on at least one of the fuse parts (12), and the second direction is within the plane where the fuse part (12) is located and is perpendicular to the first direction.

4. The adapter assembly according to claim 3, characterized in that: The fuse parts (12) include at least two, an opening (121) is provided between two adjacent fuse parts (12), and the coil (4) is at least sleeved on the fuse part (12) with the smallest size along the second direction.

5. The adapter assembly according to claim 2, wherein: Two adjacent single-turn layers in the coil (4) are insulated from each other.

6. The adapter assembly according to any one of claims 2 to 5, characterized in that: It also includes an insulating bracket (5), which is arranged between the coil and the adapter (1) to prevent the coil from contacting the adapter (1).

7. The adapter assembly according to claim 6, characterized in that: A continuous accommodating groove (521) for accommodating a single coil is provided on the contact surface between the insulating bracket (5) and the coil (4).

8. The adapter assembly according to claim 7, characterized in that: The insulating support (5) comprises: A first portion (51), wherein the first portion (51) is provided with a through hole (511), and a part of the structure of the adapter (1) is passed through the through hole (511); The second part (52) is sleeved on the outside of the first part (51), and the coil (4) is wound on the outer surface of the second part (52); The third part (53) has two ends respectively connected to a side of the hole wall of the first part (51) facing away from the adapter (1) and a side of the second part (52) facing away from the coil (4).

9. The adapter assembly according to claim 8, characterized in that: The side of the second portion (52) for winding the coil (4) is provided with a continuous receiving groove (521) for receiving a single turn; The dimension of the accommodating groove (521) along the axial direction of the coil (4) is the same as the diameter of the wire body of the coil (4).

10. A battery, characterized in that: The invention comprises a pole (2), a pole tab (3) and a transition assembly according to any one of claims 1 to 9, wherein the transition assembly connects the pole (2) and the pole tab (3).

11. An electrical device, characterized in that: A battery comprising the battery of claim 10.

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