Power supply

Abstract

The utility model provides a power supply. The power supply comprises an interface, a circuit board and at least one battery pack, the interface and the battery pack are both connected with the circuit board, the battery pack comprises a conductive connecting piece and at least two connected columnar batteries, a first connecting part of the conductive connecting piece is fixedly connected with a first electrode of a first columnar battery in the two columnar batteries, and a second connecting part of the conductive connecting piece is fixedly connected with a second electrode of a second columnar battery in the two columnar batteries. The second connecting part of the conductive connecting piece is fixedly connected with the second electrode of the second columnar battery in the two columnar batteries; when the first columnar battery and the second columnar battery are sequentially arranged in the axial direction, the conductive connecting piece is in a folded state, and the projection of the conductive connecting piece on the end face of the first columnar battery is located in the peripheral projection area of the first columnar battery. The power supply is high in reliability and low in processing cost.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a power source. Background Art

[0002] Power supplies are indispensable equipment for daily life and industrial production. Some existing power supplies use columnar batteries (such as cylindrical batteries) as battery cells to realize the charging and discharging of electric energy. In order to increase the voltage or expand the capacity, multiple batteries need to be connected (such as in series or in parallel), and when the batteries are connected, the two batteries are connected end to end or end to end. In order to ensure stable resistance after connection and avoid the problem of excessive resistance due to loose contact, the electrodes of the two connected batteries are usually connected by welded conductive sheets. Figure 1 A schematic diagram of welding the conductive sheets of a series of batteries connected by conductive sheets is shown. After welding the conductive sheets, if the axes of the two batteries are to be aligned, the conductive sheets need to be bent. The battery with the bent conductive sheets has problems of low safety and easy leakage. In addition, the existing batteries may also have problems such as high cost and poor heat dissipation during use. Utility Model Content

[0003] In view of this, an embodiment of the present application provides a power supply to at least partially solve the above-mentioned problem.

[0004] According to one aspect of the present application, a power supply is provided, which includes an interface, a circuit board and at least one battery pack, the interface and the battery pack are both connected to the circuit board, the battery pack includes a conductive connector and at least two connected cylindrical batteries, a first connecting portion of the conductive connector is fixedly connected to a first electrode of a first cylindrical battery of the two cylindrical batteries, and a second connecting portion of the conductive connector is fixedly connected to a second electrode of a second cylindrical battery of the two cylindrical batteries; when the first cylindrical battery and the second cylindrical battery are in a state of being arranged sequentially along the axial direction, the conductive connector is in a folded state, and a projection of the conductive connector on the end face of the first cylindrical battery is located within the peripheral projection area of ​​the first cylindrical battery.

[0005] Optionally, the folding state is a folded state, and when the conductive connecting member is in the folded state, the conductive connecting member forms two bent portions, and the angle between the two bent portions ranges from 0° to 10°.

[0006] Optionally, a first groove is provided on the first connecting portion of the conductive connecting member, and / or a second groove is provided on the second connecting portion of the conductive connecting member.

[0007] Optionally, the folding state is a multi-fold state. When the conductive connector is in the multi-fold state, the conductive connector forms N bending parts, and the first bending part among the N bending parts is connected to the first columnar battery, and the last bending part among the N bending parts is connected to the second columnar battery, and N is greater than or equal to 3.

[0008] Optionally, the power supply also includes a first protective shell, the first protective shell has at least one accommodating cavity, the battery pack is arranged in the accommodating cavity, and at least a portion of the circumference of at least one cylindrical battery in the battery pack is in direct contact with the inner wall of the first protective shell, or, at least a portion of the circumference of at least one cylindrical battery in the battery pack is provided with a protective layer, and at least one cylindrical battery is in contact with the inner wall of the first protective shell through the protective layer.

[0009] Optionally, the first protective shell is a metal shell, and / or a heat-conducting insulation layer is provided on a wall surface of the accommodating cavity of the first protective shell.

[0010] Optionally, the power supply further includes a first end cover and a second end cover, the first end cover is located at the first end of the first protective shell and connected to the first protective shell via a fastener, and the second end cover is located at the second end of the first protective shell and connected to the first protective shell via a fastener.

[0011] Optionally, a first accommodating groove is provided on the first end cover, a second accommodating groove is provided on the second end cover, and the power supply also includes a second protective shell that is at least partially transparent, the second protective shell is arranged outside the first protective shell, and the first part of the second protective shell extends into the first accommodating groove, and the second part of the second protective shell extends into the second accommodating groove.

[0012] Optionally, a button opening is provided on the first end cover, the power supply further includes a micro switch and a button, the micro switch is connected to the circuit board, the button includes a button body and a limiting flange, the button body is at least partially embedded in the button opening and can be moved relative to the first end cover, the limiting flange protrudes from the outer periphery of the button body, and the limiting flange is connected to the first end cover by a deformable adhesive.

[0013] Optionally, the point on the conductive connector connected to the first cylindrical battery is the first connection point, the point on the conductive connector connected to the second cylindrical battery is the second connection point, the end face where the first cylindrical battery cooperates with the conductive connector is end face B, the end face where the second cylindrical battery cooperates with the conductive connector is end face A, the distance between any first connection point and any second connection point on the conductive connector is the first distance, and when the end face A and the end face B are in the same plane, the first distance is smaller than the distance between the first cooperation point corresponding to the first connection point on the first cylindrical battery and the second cooperation point corresponding to the second connection point on the second cylindrical battery.

[0014] The interface of the power supply provided in each embodiment of the present application is used to connect to an external device for charging or discharging. The circuit board is connected to the interface and the battery pack to achieve power control. The power supply may include one or more battery packs. Among them, at least one battery pack includes at least two cylindrical batteries, which are respectively recorded as the first cylindrical battery and the second cylindrical battery. When the first cylindrical battery and the second cylindrical battery are arranged in sequence along the axial direction, the conductive connector is in a folded state, and the projection of the conductive connector is located within the peripheral projection area of ​​the first cylindrical battery and / or the second cylindrical battery. In other words, the conductive connector does not protrude from the cylindrical battery, which can improve safety, solve the leakage problem, and has lower processing difficulty, lower cost and higher efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Further details, features and advantages of the present application are disclosed in the following description of exemplary embodiments in conjunction with the accompanying drawings, in which:

[0016] Figure 1 A schematic diagram showing welding of conductive sheets of batteries connected in series via conductive sheets is shown.

[0017] Figure 2 A schematic diagram showing two batteries connected in series and arranged in sequence along the axial direction is shown.

[0018] Figure 3 A schematic diagram of the three-dimensional structure of a power supply from a first viewing angle is shown.

[0019] Figure 4 A schematic diagram of the three-dimensional structure of a power supply from a second viewing angle is shown.

[0020] Figure 5 A schematic diagram of the three-dimensional structure of a power supply without a shell is shown.

[0021] Fig. 6A A schematic diagram of the three-dimensional structure of the battery pack at a first viewing angle when the first columnar battery is in a see-through state is shown.

[0022] Figure 6B A schematic diagram of the three-dimensional structure of the battery pack at a second viewing angle when the first columnar battery is in a see-through state is shown.

[0023] Figure 6C Shows Figure 6B A partial enlarged view of point B in the middle.

[0024] Fig.6D A schematic diagram showing a method for processing a battery pack having a conductive connector in a folded state.

[0025] Fig. 6E A schematic diagram of a battery pack with a conductive connector in a folded state is shown.

[0026] Fig. 6F A schematic diagram is shown when the conductive connector is unfolded and the first cylindrical battery and the second cylindrical battery are placed side by side.

[0027] Fig. 7A A schematic diagram of a battery pack with a conductive connector in a multi-fold state is shown.

[0028] Figure 7B A schematic diagram showing the processing of a battery pack having a conductive connector in a multi-fold state.

[0029] Fig. 8A A schematic diagram of the three-dimensional structure of the conductive connecting member in a folded state is shown.

[0030] Figure 8B A schematic structural diagram of the first conductive connecting member is shown.

[0031] Figure 8C A schematic structural diagram of the second conductive connecting member is shown.

[0032] Fig. 9 A schematic diagram of the three-dimensional structure of the battery pack and the first protective shell is shown.

[0033] Fig. 10A A schematic diagram of the three-dimensional structure of the first end cover from a first viewing angle is shown.

[0034] Fig. 10B A rear structural schematic diagram of the first end cover is shown.

[0035] Fig. 10C Shows Fig. 10B Schematic diagram of the cross-sectional structure at II in the middle.

[0036] Fig. 10D Shows Fig. 10B Schematic diagram of the cross-sectional three-dimensional structure at II in the middle.

[0037] Fig.11A A schematic diagram of the three-dimensional structure of the first end cover and the first protective shell in cooperation is shown.

[0038] Fig. 11B A schematic diagram of the three-dimensional structure of the second end cover and the second protective shell in cooperation is shown.

[0039] Reference numerals:

[0040] Existing technology:

[0041] 1. Battery; 2. Conductive sheet; 3. Insulation bracket;

[0042] This application:

[0043] 11. Interface; 12. Circuit board; 20. Battery pack; 21. Conductive connector; 211. First connection part; 212. Second connection part; 213. First slot; 214. Second slot; 22. First cylindrical battery; 23. Second cylindrical battery; 24. Collection pin; 31. First protective shell; 32. Second protective shell; 33. First end cover; 331. First receiving slot; 34. Second end cover; 341. Second receiving slot; 41. Micro switch; 42. Button; 421. Limiting flange; 50. Deformable adhesive. DETAILED DESCRIPTION

[0044] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes and are not intended to limit the scope of protection of the present application.

[0045] It should be understood that the various steps described in the method implementation of the present application can be performed in different orders and / or performed in parallel. In addition, the method implementation may include additional steps and / or omit the steps shown. The scope of the present application is not limited in this respect.

[0046] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0047] It should be noted that the modifications of "one" and "multiple" mentioned in this application are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more". The names of messages or information exchanged between multiple devices in the embodiments of this application are only for illustrative purposes and are not used to limit the scope of these messages or information.

[0048] For ease of understanding and explanation, before describing the embodiments of the present application, Figure 1 and Figure 2 and Figure 6

[0049] , the existing battery connection method and processing process are described as follows:

[0050] like Figure 1 As shown, when any two batteries 1 need to be connected, if the two are directly pressed together to connect and conduct electricity, there will be a problem of unstable resistance between the batteries due to changes in the pressing force or shaking of the batteries 1. In order to ensure the stability of the resistance between the batteries, a conductive sheet 2 can be used for connection. In this case, the existing processing method is to place the batteries 1 side by side, and then weld the conductive sheet 2 to the electrodes of the two batteries 1 (such as Figure 1 Then, one of the batteries 1 is turned over so that the axes of the two batteries 1 coincide with each other, thereby realizing that the two batteries 1 are arranged axially in sequence (as shown in FIG. Figure 2 As shown). The inventors have found through research that this method causes the conductive sheet 2 to be partially protruded from the periphery of the battery 1 after being bent, which is prone to leakage and causes the problem of insufficient safety. If leakage needs to be prevented, an additional insulating bracket 3 or other structure needs to be provided, which leads to high cost, high difficulty in production and processing, and reduces the heat dissipation efficiency. Alternatively, a certain distance is set between the battery 1 and the housing, which causes the battery 1 to transfer heat through the air, affecting the heat dissipation efficiency.

[0051] In the present embodiment, in order to solve at least one of the aforementioned problems, a power supply is provided, which includes an interface 11, a circuit board 12 and at least one battery pack 20, the interface 11 and the battery pack 20 are both connected to the circuit board 12, the battery pack 20 includes a conductive connector 21 and at least two connected cylindrical batteries, the first connecting portion 211 of the conductive connector 21 is fixedly connected to the first electrode of the first cylindrical battery 22 of the two cylindrical batteries, and the second connecting portion 212 of the conductive connector 21 is fixedly connected to the second electrode of the second cylindrical battery 23 of the two cylindrical batteries; when the first cylindrical battery 22 and the second cylindrical battery 23 are in a state of being arranged sequentially along the axial direction, the conductive connector 21 is in a folded state, and the projection of the conductive connector 21 on the end surface of the first cylindrical battery 22 is located within the peripheral projection area of ​​the first cylindrical battery 22.

[0052] The interface 11 of the power supply is used to connect to an external device for charging or discharging. The circuit board 12 is connected to the interface 11 and the battery pack 20 to achieve power control. The power supply may include one or more battery packs 20. Among them, at least one battery pack 20 includes at least two cylindrical batteries, which are respectively recorded as a first cylindrical battery 22 and a second cylindrical battery 23. When the first cylindrical battery 22 and the second cylindrical battery 23 are arranged in sequence along the axial direction, the conductive connector 21 is in a folded state, and the projection of the conductive connector 21 on the end face of the first cylindrical battery 22 (the end face is, for example, the end face B of the first cylindrical battery 22) is located at the periphery of the first cylindrical battery 22 and / or the second cylindrical battery 23 (the periphery is the periphery of the cylindrical battery, such as Fig. 6A In other words, the conductive connector 21 will not protrude from the periphery of the cylindrical battery, which can improve safety, solve the leakage problem, and has lower processing difficulty, lower cost and higher efficiency.

[0053] See also Figures 3 to 5 In addition to the aforementioned interface 11, circuit board 12 and battery pack 20, the power supply also includes a shell. In this embodiment, the shell includes at least a first protective shell 31, a first end cover 33 and a second end cover 34. The battery pack 20 is located in the first protective shell 31, the circuit board 12 is arranged outside the first protective shell 31, the first end cover 33 is located at one end of the first protective shell 31, and the second end cover 34 is located at the other end of the first protective shell 31. There can be one or more interfaces 11, which are electrically connected to the circuit board 12, and can be exposed from the openings on the first end cover 33 and / or the second end cover 34. Of course, it should be noted that this embodiment only illustrates a structure of a shell, and other types of shells can be used in other embodiments without limitation.

[0054] like Figure 5 As shown, in this embodiment, the power supply includes a plurality of battery packs 20, and the plurality of battery packs 20 are arranged along Figure 5 The battery packs 20 are arranged in sequence in the Z direction, and the battery packs 20 can be connected in series or in parallel as needed. For example, when the voltage needs to be increased, multiple battery packs 20 can be connected in series, or when the capacity needs to be increased, multiple battery packs 20 can be connected in parallel. This embodiment does not limit the connection relationship between the battery packs 20.

[0055] In some examples, each battery pack 20 may include at least two cylindrical batteries, for example, the cylindrical batteries are cylindrical batteries, that is, batteries with a circular cross section perpendicular to the axial direction. Of course, the cylindrical batteries may also be batteries with other cross sections, including but not limited to: rectangular cylindrical batteries, pentagonal cylindrical batteries, hexagonal cylindrical batteries, etc.

[0056] For a clearer description, the battery pack 20 includes two cylindrical batteries, which are respectively recorded as a first cylindrical battery 22 and a second cylindrical battery 23. The first cylindrical battery 22 includes a first electrode and a second electrode spaced apart in the axial direction, and similarly, the second cylindrical battery 23 also includes a first electrode and a second electrode spaced apart in the axial direction. In this embodiment, the conductive connector 21 is connected between the first cylindrical battery 22 and the second cylindrical battery 23.

[0057] In one example, see Figures 6A to 6C When the first cylindrical battery 22 and the second cylindrical battery 23 are arranged in sequence along the axial direction, the conductive connector 21 is in a folded state, and the folded state is a folded state. In this state, the bending line formed by the folding of the conductive connector 21 will not protrude from the outer peripheral surface of the first cylindrical battery 22, thereby reducing the risk of leakage.

[0058] In another example, Fig. 7A As shown, when the first cylindrical battery 22 and the second cylindrical battery 23 are in a state of being arranged in sequence along the axial direction, the conductive connector 21 is in a folded state, and the folded state is a multi-folded state. In this state, each bending line formed by the folding of the conductive connector 21 will not protrude from the outer peripheral surface of the first cylindrical battery 22.

[0059] The structures and processing of the battery pack 20 in two folded states are described in detail below in conjunction with the accompanying drawings:

[0060] See also FIG. 6A to FIG. 6D , the processing process of the battery pack 20 with the conductive connector 21 in a folded state is, for example: the first cylindrical battery 22 is placed in a certain posture, such as the axis is placed vertically, or the axis is placed horizontally, or the axis is placed at a certain inclination angle. The first connecting portion 211 of the conductive connector 21 is welded and connected to the first electrode of the first cylindrical battery 22. The second cylindrical battery 23 is placed in a certain posture, and it is ensured that the angle between the end face where the first electrode of the first cylindrical battery 22 is located (referred to as end face B, SB shown in the figure) and the end face where the second electrode of the second cylindrical battery 23 is located (referred to as end face A, SA shown in the figure) is not 180°, in other words. The angle formed between the two end faces can be an acute angle, a right angle or an obtuse angle. The second connecting portion 212 of the conductive connector 21 and the second electrode of the second cylindrical battery 23 are welded, and then one of the first cylindrical battery 22 or the second cylindrical battery 23 is flipped so that the two are arranged in sequence axially, that is, Fig. 6A and Figure 6B In the state shown in FIG. 1 , the conductive connector 21 is folded in half during the flipping process to form two bent portions, and the formed bending line does not exceed the outer periphery of the first cylindrical battery 22 and / or the second cylindrical battery 23.

[0061] The principle is: see Fig.6D When the first cylindrical battery 22 and the second cylindrical battery 23 are placed in a manner that the end face A and the end face B are in a parallel state, the conductive connector 21 can be placed in contact with the end face A and the end face B and welded. At this time, if the distances from P0 and P1 to the center of the reference circle (i.e., the dotted circle in the figure) are equal, the distance between the two reference points P0 and P1 of the conductive connector 21 is the diameter of the reference circle. When the second cylindrical battery 23 rotates a certain angle so that the angle between the end face A and the end face B is not 180°, no matter whether the angle between the end face A and the end face B is an obtuse angle, a right angle or an acute angle, the conductive connector 21 can be tilted at an angle to connect the first cylindrical battery 22 and the second cylindrical battery 23. In this way, the distance between the reference point P1 and the reference point P0' on the conductive connector 21 is a certain chord length of the reference circle. Obviously, the chord length is smaller than the diameter of the circle. Therefore, after the part between the reference point P1 and the reference point P0' on the conductive connector 21 is folded in half, the length of the bent part formed must be smaller than the distance from the reference point P1 to the outer periphery of the first cylindrical battery 22, which ensures that the bending line will not protrude from the outer periphery of the first cylindrical battery 22.

[0062] It should be noted that Fig.6D This is only a schematic diagram of the placement of the first cylindrical battery 22 and the second cylindrical battery 23 in principle. Based on the above principle, other placement methods that can be thought of by those skilled in the art without creative work should be within the scope of protection of this application. For example, Fig. 6E A schematic diagram is shown in which a first cylindrical battery 22 and a second cylindrical battery 23 are placed vertically to each other and connected via a conductive connector 21. In addition, the present application does not limit the processing sequence.

[0063] According to the above principle, in the battery pack 20 manufactured by the above method or other methods based on the same principle as the above method, if the point on the conductive connecting member 21 connected to the first cylindrical battery 22 is the first connection point ( Fig. 6F The point on the conductive connecting member 21 connected to the second cylindrical battery 23 is the second connection point ( Fig. 6F As mentioned above, the end face of the first cylindrical battery 22 that matches with the conductive connector 21 is the end face B, and the point on the end face B that matches with the first connection point is recorded as the first matching point ( Fig. 6F The end face of the second cylindrical battery 23 that matches the conductive connector 21 is the end face A, and the point on the end face A that matches the second connection point is recorded as the second matching point ( Fig. 6FAs shown in point D2), the distance between any first connection point and any second connection point on the conductive connector 21 is a first distance. When the end face A and the end face B are in the same plane, the first distance is smaller than the distance between the first matching point corresponding to the first connection point on the first cylindrical battery 22 and the second matching point corresponding to the second connection point on the second cylindrical battery.

[0064] For example, Fig. 6F In the embodiment, when the end face A and the end face B are in the same plane, the first cylindrical battery 22 and the second cylindrical battery 23 are placed side by side and close to each other (for example, the first cylindrical battery 22 and the second cylindrical battery 23 are in a state of being tangent to each other at the periphery), if the conductive connector 21 is in a flattened state, the first distance L1 between the first connection point C1 and the second connection point C2 is less than the distance L2 (referred to as the second distance) between the first matching point D1 and the second matching point D2. It should be noted that the aforementioned first distance L1 is the distance between the two connection points when the conductive connector 21 is in a flattened state.

[0065] Optionally, when in the processed battery pack 20, the first cylindrical battery 22 and the second cylindrical battery 23 are in a state of being arranged in sequence along the axial direction, and the conductive connector 21 is in a folded state, the angle between the two bent portions formed by the conductive connector 21 ranges from 0° to 10°, that is, after the first cylindrical battery 22 and the second cylindrical battery 23 are in a state of being arranged in sequence along the axial direction, the two bent portions of the conductive connector 21 can be parallel to each other or close together, that is, the angle between them is 0°. In this case, the overall axial dimension is small and the structure is compact.

[0066] Of course, there may be some gaps between the two bent portions, and the angle between the two bent portions may be 1°, 2°, 3°, 5°, 10°, etc., which can also ensure the stability of conductivity between the first columnar battery 22 and the second columnar battery 23. In this case, the axis of the first columnar battery 22 and the axis of the second columnar battery 23 are not strictly parallel or coincident.

[0067] It should be noted that the first connection portion 211 , the second connection portion 212 and the two bent portions of the conductive connector 21 are logical divisions of the conductive connector 21 , and do not limit the structure of the conductive connector 21 to a split structure.

[0068] In addition to the aforementioned folding method to achieve the effect that the bending line does not exceed the outer periphery of the first cylindrical battery 22, the effect that the bending line does not exceed the outer periphery of the first cylindrical battery 22 can also be achieved by forming the conductive connector 21 into a multi-fold state. Fig. 7A and 7B, shows a schematic diagram of a conductive connector 21, the conductive connector 21 includes a first connecting portion 211, a second connecting portion 212 and a middle portion, the middle portion is connected between the first connecting portion 211 and the second connecting portion 212, and the middle portion is a bent middle portion. The process of using the conductive connector 21 for processing is, for example:

[0069] The first cylindrical battery 22 and the second cylindrical battery 23 are placed in a certain posture, for example, Figure 7B As shown, the first columnar battery 22 and the second columnar battery 23 can be placed in a manner that the end face A and the end face B are parallel to each other. Of course, they can also be placed in a manner that there is an angle between the end face A and the end face B. Use the conductive connector 21 with a bent middle portion to connect the first columnar battery 22 and the second columnar battery 23 respectively, and then flip one of the first columnar battery 22 and the second columnar battery 23, so that the first columnar battery 22 and the second columnar battery 23 are in a state of being arranged in sequence along the axial direction. At this time, as shown in FIG. Fig. 7A As shown, the conductive connecting member 21 is in a multi-fold state, and the conductive connecting member 21 forms N bent portions (such as Fig. 7A The part enclosed by the dotted ellipse is a bending part. Fig. 7A The conductive connector 21 shown in the figure has 4 bending parts), and the first bending part among the N bending parts (that is, the first connecting part 211) is connected to the first columnar battery 22, and the last bending part among the N bending parts (that is, the second connecting part 212) is connected to the second columnar battery 23, and N is greater than or equal to 3.

[0070] In summary, this embodiment provides at least two processing methods in which when the first cylindrical battery 22 and the second cylindrical battery 23 are arranged in sequence along the axial direction, the conductive connector 21 is in a folded state, and the projection of the conductive connector 21 on the end surface of the first cylindrical battery 22 is located within the peripheral projection area of ​​the first cylindrical battery 22 (that is, the projection of the conductive connector 21 does not exceed the periphery of the cross section of the first cylindrical battery 22). However, it should be understood that the processing method provided in this embodiment is only an exemplary description and should not cause adverse limitations on the scope of protection.

[0071] Optionally, in order to reduce the processing difficulty and cost, improve the processing efficiency, and ensure the reliability of the battery pack 20, as Figures 8A to 8CAs shown, a first groove 213 is provided on the first connection part 211 of the conductive connector 21, and / or a second groove 214 is provided on the second connection part 212 of the conductive connector 21. By providing the first groove 213 and the second groove 214, a greater deformation capacity can be provided for the conductive connector 21, so that it can better release stress or adapt to some errors in the processing process. For example, the first connection part 211 and the first electrode of the first columnar battery 22 are welded and connected, and the second connection part 212 and the second electrode of the second columnar battery 23 are welded. Some stress may be generated during the welding process. If these stresses are not released, they may cause the welding to be disconnected, thereby affecting the stability. For this reason, the first groove 213 and / or the second groove 214 are provided to achieve stress release.

[0072] The shapes of the first groove 213 and the second groove 214 can be the same or different, for example, they can be straight grooves, curved grooves, etc., and there is no limitation on this. Taking the straight groove as an example, the welding points where the conductive connector 21 is connected to the electrode can be located on both sides of the straight groove, so that the stress is more uniform, and the conductive path is shorter and the resistance is smaller.

[0073] Alternatively, if Fig. 9 As shown, the first protective shell 31 has at least one accommodating cavity, the battery pack 20 is arranged in the accommodating cavity, and at least part of the circumference of at least one cylindrical battery in the battery pack 20 is in direct contact with the inner wall of the first protective shell 31, or at least part of the circumference of at least one cylindrical battery in the battery pack 20 is provided with a protective layer, and at least one cylindrical battery is in contact with the inner wall of the first protective shell 31 through the protective layer. Since the bending line of the conductive connector 21 of the battery pack 20 in this embodiment does not protrude from the outer periphery of the first cylindrical battery 22 and / or the second cylindrical battery 23, the possibility of leakage caused by the protrusion of the conductive connector 21 is reduced, so that the bracket (the bracket is used to separate the battery pack 20 and the shell) separately provided outside the battery pack 20 in order to avoid leakage in the prior art can be omitted, thereby saving costs and reducing processing steps. Moreover, when the battery pack 20 is assembled into the first protective shell 31, it is not necessary to deliberately adjust the angle of the battery pack 20, and the assembly efficiency is higher. Alternatively, a protective layer may be packaged outside the battery pack 20 and then placed in the first protective shell 31. Since the bending line of the conductive connector 21 does not protrude from the outer periphery of the first cylindrical battery 22, the thickness of the protective layer can be very thin. The protective layer may be a plastic film or a protective layer of other materials, and there is no limitation on this. After the battery pack 20 with a protective layer is placed in the first protective shell 31, the cylindrical battery contacts the inner wall of the first protective shell 31 through the protective layer, thereby achieving heat transfer. Since the thermal conductivity of the protective layer is higher than that of air, relatively efficient heat dissipation can be achieved.

[0074] Optionally, in order to improve the heat dissipation capability and extend the life of the battery pack 20, the first protective shell 31 is made of a high thermal conductivity material, for example, the first protective shell 31 is a metal shell. In this way, the first protective shell 31 and the columnar batteries in the battery pack 20 can be in contact to better transfer heat, thereby improving the heat dissipation efficiency.

[0075] Optionally, in order to further increase reliability and safety, a thermally conductive insulating layer (not shown in the figure) is provided on the wall surface of the accommodating cavity of the first protective shell 31. For example, if the first protective shell 31 is made of aluminum alloy, an oxide film of the aluminum alloy can be used for insulation. Its thermal conductivity is 1.2w / m / k or above. In the present embodiment, the thickness of the thermally conductive insulating layer is less than or equal to 20 microns. Because its thickness is very thin, the thermal resistance of the thermally conductive insulating layer is low. The calculation formula of thermal resistance is: thermal resistance = thickness / (thermal conductivity*area). It can be seen that the thermal resistance per unit area will decrease as the thickness decreases.

[0076] If the first protective shell 31 is made of stainless steel or other metal materials, it can be insulated by electrophoretic insulating paint, or by spraying other insulating materials.

[0077] Alternatively, if Fig. 9 As shown, in order to meet the needs of collecting battery information in the battery pack 20, a collection pin 24 is provided on the conductive connector 21. The collection pin 24 can be integrally formed with the conductive connector 21, or can be processed separately and then connected to the conductive connector 21, and there is no limitation on this. It should be noted that when in use, the collection pin 24 extends from the gap between the first cylindrical battery 22 and the second cylindrical battery 23, and is bent and connected to a wire or other device. In order to avoid leakage due to the collection pin 24, the collection pin 24 of this embodiment needs to be ensured not to contact the first protective shell 31 after being extended and bent. For example, from Fig. 9 As can be seen from the figure, after the battery pack 20 is installed in the first protective shell 31, the end point of the diameter in the width direction of the first protective shell 31 ( Fig. 9 The midpoint M and the point N) are the points closest to the inner wall of the first protective shell 31. As long as the extended position of the acquisition pin 24 is not outside the point N or the point M in the width direction of the first protective shell 31 after being bent, the acquisition pin 24 can be prevented from contacting the first protective shell 31.

[0078] It should be noted that the collection pin 24 is used to collect voltage signals, so the current on the collection pin 24 is very small (for example, only microampere level), so the collection pin 24 is allowed to have a smaller cross-section (that is, the thickness can be relatively thin), so that even if the collection pin 24 extends out of the gap between the first cylindrical battery 22 and the second cylindrical battery 23 and then bends, it is not easy to contact other structures or the inside of the shell, so as not to cause leakage, and it is relatively easy to avoid the collection pin 24 from contacting the first protective shell 31 by adjusting the extended position of the collection pin 24.

[0079] For the conductive connector 21, because it needs to achieve conductive connection between the first columnar battery 22 and the second columnar battery 23, the current passing through it is relatively large (may require several amperes or tens of amperes, etc.). In order to avoid excessive heat, the resistance of the conductive connector 21 needs to be as small as possible. For this reason, the cross-sectional area of ​​the conductive connector 21 needs to be as large as possible, which makes the width of the conductive connector 21 wider. If there is a part protruding from the outer periphery of the first columnar battery 22 after bending, it is easy to contact with other structures, so it is easy to leak electricity, and it is difficult to avoid contact by adjusting the assembly angle of the battery pack 20 in the first protective shell 31.

[0080] Optionally, as before, the power supply further includes a first end cover 33 and a second end cover 34, the first end cover 33 is located at the first end of the first protective shell 31, and is connected to the first protective shell 31 by a fastener, and the second end cover 34 is located at the second end of the first protective shell 31, and is connected to the first protective shell 31 by a fastener. This method is more convenient for installation and disassembly, and is also convenient for maintenance. The fastener is, for example, a bolt, etc., and a threaded hole extending in the length direction is provided on the first protective shell 31, which can be used to cooperate with the fastener. Of course, the fastener is not limited to this, and it can also be any other suitable part, such as a rivet, adhesive, etc., without limitation to this.

[0081] Alternatively, if Figures 10A to 10DAs shown, in order to facilitate the switch control of the power supply, a button opening is provided on the first end cover 33, and the power supply further includes a micro switch 41 and a button 42. The micro switch 41 is connected to the circuit board 12, and the button 42 includes a button body and a limit flange 421. The button body is at least partially embedded in the button opening and can move relative to the first end cover 33. The limit flange 421 protrudes from the outer periphery of the button body, and the limit flange 421 is connected to the first end cover 33 through a deformable adhesive 50 (the connection can be direct or indirect, and there is no limitation to this). The button 42 is connected to the first end cover 33 through the deformable adhesive 50, because the deformable adhesive 50 has a certain deformation ability and can be bonded and fixed to the button 42, so that even if the button 42 is a rigid whole, it can have a certain amount of movement relative to the first end cover 33, so that the button 42 can be pressed to trigger the micro switch 41. In this way, the installation and sealing protection of the button 42 are realized, and the button 42 can be pressed.

[0082] In this embodiment, the pins of the micro switch 41 extend from the top and are connected to the circuit board 12 located above. The micro switch 41 is arranged at one end of the battery pack 20 in the axial direction, and the bottom surface of the micro switch 41 can be supported by the end surface of the battery pack 20 or other structures, so that the original bottom support frame of the micro switch 41 can be removed.

[0083] Alternatively, if Figures 11A to 11B The first end cover 33 is provided with a first receiving groove 331, the second end cover 34 is provided with a second receiving groove 341, and the power supply further includes a second protective shell 32 which is at least partially transparent, the second protective shell 32 is sleeved outside the first protective shell 31, and the first part of the second protective shell 32 extends into the first receiving groove 331, and the second part of the second protective shell 32 extends into the second receiving groove 341. Fig. 11B As shown, part of the second protective shell 32 extends into the first receiving groove 331 and the second receiving groove 341 , which can realize the positioning of the second protective shell 32 on the one hand, and facilitate sealing on the other hand, and is easy to assemble.

[0084] In summary, this embodiment provides a new processing method for the battery pack 20, and the conductive connector 21 between the two cylindrical batteries axially arranged in sequence in the processed power supply does not have any part protruding from the periphery of the cylindrical battery, thereby making the power supply more reliable, and the processing cost is low and the processing efficiency is high.

[0085] It should be pointed out that, according to the needs of implementation, the various components / steps described in the embodiments of the present application can be split into more components / steps, or two or more components / steps or partial operations of components / steps can be combined into new components / steps to achieve the purpose of the embodiments of the present application.

[0086] Those of ordinary skill in the art will appreciate that the units and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present application.

[0087] The above implementation methods are only used to illustrate the embodiments of the present application, and are not limitations on the embodiments of the present application. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the embodiments of the present application. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present application. The scope of patent protection of the embodiments of the present application should be limited by the claims.

Claims

1. A power supply, characterized in that: The invention comprises an interface (11), a circuit board (12) and at least one battery pack (20), wherein the interface (11) and the battery pack (20) are both connected to the circuit board (12), and the battery pack (20) comprises a conductive connector (21) and at least two connected cylindrical batteries, wherein a first connecting portion (211) of the conductive connector (21) is fixedly connected to a first electrode of a first cylindrical battery (22) of the two cylindrical batteries, and a second connecting portion (212) of the conductive connector (21) is fixedly connected to a second electrode of a second cylindrical battery (23) of the two cylindrical batteries; When the first columnar battery (22) and the second columnar battery (23) are in a state of being arranged in sequence along the axial direction, the conductive connecting member (21) is in a folded state, and the projection of the conductive connecting member (21) on the end surface of the first columnar battery (22) is located within the peripheral projection area of ​​the first columnar battery (22).

2. The power supply according to claim 1, characterized in that: The folded state is a folded state. When the conductive connecting member (21) is in the folded state, the conductive connecting member (21) forms two bent portions, and the angle between the two bent portions ranges from 0° to 10°.

3. The power supply according to claim 1 or 2, characterized in that: The first connecting portion (211) of the conductive connecting member (21) is provided with a first groove (213), and / or the second connecting portion (212) of the conductive connecting member (21) is provided with a second groove (214).

4. The power supply according to claim 1, characterized in that: The folded state is a multi-fold state. When the conductive connecting member (21) is in the multi-fold state, the conductive connecting member (21) forms N bent portions, and the first bent portion of the N bent portions is connected to the first columnar battery (22), and the last bent portion of the N bent portions is connected to the second columnar battery (23), and N is greater than or equal to 3.

5. The power supply according to claim 1, characterized in that: The power source further comprises a first protective shell (31), the first protective shell (31) having at least one accommodating cavity, the battery pack (20) being arranged in the accommodating cavity, and at least a portion of the circumference of at least one of the cylindrical batteries in the battery pack (20) being in direct contact with the inner wall of the first protective shell (31), or at least a portion of the circumference of at least one of the cylindrical batteries in the battery pack (20) being provided with a protective layer, and the at least one cylindrical battery being in contact with the inner wall of the first protective shell (31) through the protective layer.

6. The power supply according to claim 5, characterized in that: The first protective shell (31) is a metal shell, and / or a heat-conducting insulating layer is provided on the wall surface of the accommodating cavity of the first protective shell (31).

7. The power supply according to claim 5 or 6, characterized in that: The power supply further comprises a first end cover (33) and a second end cover (34), wherein the first end cover (33) is located at a first end of the first protective shell (31) and is connected to the first protective shell (31) via a fastener, and the second end cover (34) is located at a second end of the first protective shell (31) and is connected to the first protective shell (31) via a fastener.

8. The power supply according to claim 7, characterized in that: The first end cover (33) is provided with a first accommodating groove (331), the second end cover (34) is provided with a second accommodating groove (341), the power supply further comprises a second protective shell (32) which is at least partially transparent, the second protective shell (32) being sleeved outside the first protective shell (31), and a first part of the second protective shell (32) extending into the first accommodating groove (331), and a second part of the second protective shell (32) extending into the second accommodating groove (341).

9. The power supply according to claim 7, characterized in that: A button opening is provided on the first end cover (33), and the power supply further comprises a micro switch (41) and a button (42), wherein the micro switch (41) is connected to the circuit board (12), and the button (42) comprises a button body and a limiting flange (421), wherein the button body is at least partially embedded in the button opening and can move relative to the first end cover (33), and the limiting flange (421) protrudes from the outer periphery of the button body, and the limiting flange (421) is connected to the first end cover (33) via a deformable adhesive (50).

10. The power supply according to claim 1 or 2, characterized in that: The point on the conductive connector (21) connected to the first columnar battery (22) is a first connection point, the point on the conductive connector (21) connected to the second columnar battery (23) is a second connection point, the end face of the first columnar battery (22) matching with the conductive connector (21) is end face B, the end face of the second columnar battery (23) matching with the conductive connector (21) is end face A, the distance between any first connection point and any second connection point on the conductive connector (21) is a first distance, and when the end face A and the end face B are in the same plane, the first distance is smaller than the distance between a first matching point on the first columnar battery (22) corresponding to the first connection point and a second matching point on the second columnar battery corresponding to the second connection point.

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