Battery controller and cylindrical battery

Abstract

The present disclosure discloses a battery controller and a cylindrical battery, wherein the cylindrical battery comprises the battery controller and a cylindrical battery cell. The battery controller comprises an outer shell, a circuit board and a solid electrode cap. The outer shell has a cavity inside, and an opening penetrating the cavity is provided on the surface. The circuit board is located in the cavity, and comprises a first surface and a second surface opposite to each other. The second surface is provided with circuit components, and the circuit components include a charging and discharging device. The solid electrode cap is a cylindrical solid structure made of a conductive metal material. The first surface of the circuit board is provided with an electrode cap pad. The solid electrode cap is welded to the circuit board through the electrode cap pad and is electrically connected to the circuit board. The solid electrode cap is exposed to the outer shell through the opening of the outer shell.

Description

Technical Field

[0001] The present disclosure relates to the field of secondary batteries, and in particular to a battery controller and a cylindrical battery. Background Art

[0002] Cylindrical batteries, such as No. 5 and No. 7 batteries, are widely used in toys, flashlights, alarm clocks and other items in daily life. Batteries are divided into nickel-cadmium batteries, nickel-metal hydride batteries, zinc-manganese batteries and lithium-ion batteries. In recent years, as people's demand for battery durability has increased, lithium-ion batteries have attracted much attention due to their high energy storage capacity.

[0003] Since cylindrical batteries are usually used in small household devices with low power requirements, they are usually small in size. For example, the diameter of a No. 5 battery is about 14 mm, and the diameter of a No. 7 battery is about 10 mm. A cylindrical battery usually includes a shell, a battery cell, a circuit board, and an electrode cap, wherein the electrode cap includes a cap body and a brim, and the brim is welded to the first surface of the circuit board to fix the electrode cap. However, the electrode cap occupies a large space on the circuit board, resulting in a small remaining space on the first surface of the circuit board, and insufficient space is left to install other devices. Summary of the invention

[0004] In order to solve the problem in the related art that the electrode cap occupies a large space on the circuit board, resulting in small remaining space on the first surface of the circuit board for installing other devices, the present disclosure provides a battery controller and a cylindrical battery that can reduce the size of the battery controller and achieve reliable fixation of the electrode cap.

[0005] The present disclosure provides a battery controller, comprising:

[0006] An outer shell having a cavity inside and an opening penetrating the cavity on its surface;

[0007] A circuit board is located in the cavity and includes a first surface and a second surface opposite to each other, wherein the second surface is soldered with circuit components; and

[0008] The solid electrode cap is made of conductive metal and is a cylindrical solid structure. The first surface of the circuit board is provided with an electrode cap pad. The solid electrode cap is welded to the circuit board through the electrode cap pad and is electrically connected to the circuit board. The solid electrode cap is exposed to the outer shell through the opening.

[0009] Optionally, a plurality of the electrode cap pads are arranged on the first surface of the circuit board, a channel is formed between each of the electrode cap pads, and the solid electrode cap covers the area formed by the electrode cap pads and the channel and is bonded by soldering.

[0010] Optionally, the solid electrode cap has a circular outline, and the plurality of channels are distributed in a scattered manner with the center of the area covered by the solid electrode cap as the center of the circle.

[0011] Optionally, each electrode cap pad and the channel together form a circular area, and the solid electrode cap covers the circular area.

[0012] Optionally, each of the electrode cap pads is symmetrical with respect to the center of the circular area.

[0013] Optionally, the outline of the circuit board is circular, the center of the circular area is located at the center of the circuit board, and the solid electrode cap is concentric and coaxial with the circuit board.

[0014] Optionally, the channel is in a cross shape, a M shape, a straight shape or an S shape, and each electrode cap pad is distributed on both sides of the corresponding channel.

[0015] Optionally, a shell welding pad is formed in a region near the edge of the first surface, and a limit baffle is provided at one end of the outer shell body facing the solid electrode cap, and the limit baffle is welded to the shell welding pad.

[0016] Optionally, the battery controller further comprises an inner shell located below the second surface of the circuit board, the inner shell comprising a cylindrical shell body and a support portion arranged at one axial end of the shell body, the support portion being bent toward the central axis of the inner shell to form a support surface for supporting the circuit board;

[0017] An inner shell pad is disposed in a region near the edge of the second surface of the circuit board, and the support surface is connected to the circuit board by welding through the inner shell pad.

[0018] Optionally, the battery controller further includes an inner electrode, and an inner electrode pad is further provided on the second surface of the circuit board, the inner electrode is welded to the inner electrode pad, and the inner electrode is electrically connected to the solid electrode cap through circuit components of the circuit board.

[0019] Optionally, the solid electrode cap is a solid positive electrode cap or a solid negative electrode cap.

[0020] The present disclosure further provides a cylindrical battery, comprising:

[0021] A cylindrical battery cell having a positive electrode and a negative electrode; and

[0022] The above-mentioned battery controller is arranged at one end of the positive electrode of the columnar battery cell, the inner electrode of the battery controller is electrically connected to the positive electrode of the columnar battery cell, the outer shell of the battery controller is electrically connected to the negative electrode of the columnar battery cell, and the solid electrode cap is a solid positive electrode cap.

[0023] Optionally, the columnar battery cell is a soft-pack battery cell, the negative electrode provided at one end of the columnar battery cell is a negative electrode sheet, the negative electrode sheet extends from one end to the other end of the columnar battery cell, the columnar battery cell is inserted into a battery outer shell, the negative electrode sheet is welded to the battery outer shell, and the outer shell of the battery controller is connected to the battery outer shell;

[0024] The positive electrode disposed at the other end of the columnar battery cell is a positive electrode sheet, and the positive electrode sheet is connected to the inner electrode of the battery controller.

[0025] Optionally, the outer shell of the columnar battery cell is a steel shell, the steel shell of the columnar battery cell is the negative electrode of the columnar battery cell, and the outer shell of the battery controller is connected to the steel shell;

[0026] The columnar battery cell has a positive electrode boss, the positive electrode is connected to the positive electrode boss, and the positive electrode boss is connected to the inner electrode of the battery controller.

[0027] The present disclosure further provides a cylindrical battery, comprising:

[0028] A cylindrical battery cell having a positive electrode and a negative electrode; and

[0029] The above-mentioned battery controller is arranged at one end of the negative electrode of the columnar battery cell, the inner electrode of the battery controller is electrically connected to the negative electrode of the columnar battery cell, the outer shell of the battery controller is electrically connected to the positive electrode of the columnar battery cell, and the solid electrode cap is a solid negative electrode cap.

[0030] Optionally, the columnar battery cell is a soft-pack battery cell, the positive electrode provided at one end of the columnar battery cell is a positive electrode sheet, the positive electrode sheet extends from one end to the other end of the columnar battery cell, the columnar battery cell is inserted into a battery outer shell, the positive electrode sheet is welded to the battery outer shell, and the outer shell of the battery controller is connected to the battery outer shell;

[0031] The negative electrode disposed at the other end of the columnar battery cell is a negative electrode sheet, and the negative electrode sheet is connected to the inner electrode of the battery controller.

[0032] Optionally, the outer shell of the columnar battery core is an aluminum shell, the aluminum shell of the columnar battery core is the positive electrode of the columnar battery core, and the outer shell of the battery controller is connected to the aluminum shell;

[0033] The columnar battery cell has a negative electrode boss, the negative electrode is connected to the negative electrode boss, and the negative electrode boss is connected to the inner electrode of the battery controller.

[0034] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0035] The present disclosure provides a battery controller, which includes an outer shell, a circuit board and a solid electrode cap. The outer shell has a cavity inside, and an opening that passes through the cavity on the surface. The circuit board is located in the cavity, and includes a first surface and a second surface that are opposite to each other. The second surface is provided with circuit components, and the circuit components include charging and discharging devices. The solid electrode cap is a cylindrical solid structure made of a conductive metal material. The first surface of the circuit board is provided with an electrode cap pad. The solid electrode cap is welded to the circuit board through the electrode cap pad and is electrically connected to the circuit board. The solid electrode cap is exposed to the outer shell through the opening of the outer shell. Since the solid electrode cap is a cylindrical solid structure, it can be patch-welded to the electrode cap pad of the circuit board through the solid end face of the cylindrical solid structure. Therefore, compared with the traditional technology, the solid electrode cap omits the brim used for welding with the circuit board, saving space, so that more space is reserved on the first surface of the circuit board to install other devices.

[0036] The present disclosure provides a cylindrical battery, which includes a cylindrical battery cell and the above-mentioned battery controller. The cylindrical battery saves space by adopting the above-mentioned battery controller, so that a larger space is reserved on the first surface of the circuit board for installing other devices.

[0037] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0039] Figure 1 It is an exploded view of the battery controller of the present invention applied to No. 5 battery.

[0040] Figure 2 yes Figure 1 Top view of the assembled battery controller.

[0041] Figure 3 is along Figure 2 Section view along section line AA.

[0042] Figure 4 It is an exploded view of the circuit board and solid electrode cap of the battery controller of the present invention applied to No. 5 battery.

[0043] Figure 5 yes Figure 4 Schematic diagram of the cross section of the solid electrode cap and circuit board after assembly.

[0044] Figure 6 This is a schematic diagram of a solid negative electrode cap of a battery controller used for AA batteries and a circuit board that matches the negative electrode cap.

[0045] Figure 7 yes Figure 6 Cross-sectional view of the solid negative electrode cap after assembly with the circuit board.

[0046] Figure 8 It is an exploded view of the solid positive electrode cap and circuit board of the battery controller of the present invention applied to No. 7 battery.

[0047] Fig. 9 yes Figure 8 Schematic diagram of the battery controller after assembly.

[0048] Fig.10 yes Fig. 9 sectional view of .

[0049] Fig.11 It is an exploded view of the solid negative electrode cap and circuit board of the battery controller of the present invention applied to No. 7 battery.

[0050] Fig.12 yes Fig.11 Schematic diagram of the battery controller after assembly.

[0051] Fig.13 yes Fig.12 sectional view of .

[0052] Fig.14 Schematic diagram of an exploded view of a battery controller according to the present disclosure applied to a soft-pack battery and including a solid positive electrode cap.

[0053] Fig.15 yes Fig.14 A cross-sectional view of the battery controller after assembly.

[0054] Fig.16 Schematic diagram of an exploded view of a battery controller according to the present disclosure applied to a soft-pack battery and including a solid negative electrode cap.

[0055] Fig.17 yes Fig.16 A cross-sectional view of the battery controller after assembly.

[0056] Fig.18 is an exploded view of a cylindrical battery including a solid positive electrode cap according to the present disclosure.

[0057] Fig.19 yes Fig.18 Schematic diagram of the structure of the cylindrical battery after assembly.

[0058] Fig. 20 It is a schematic diagram of the structure of the assembled cylindrical battery including a solid negative electrode cap disclosed in the present invention.

[0059] Fig.21 is an exploded view of a pouch-type cylindrical battery including a solid positive electrode cap according to the present disclosure.

[0060] Fig. 22 yes Fig.21 Schematic diagram of the structure of the cylindrical battery after assembly.

[0061] Fig.23 is an exploded view of a pouch-type cylindrical battery including a solid negative electrode cap according to the present disclosure.

[0062] Fig.24 yes Fig.23 Schematic diagram of the structure of the cylindrical battery after assembly. DETAILED DESCRIPTION

[0063] In order to further illustrate the principle and structure of the present invention, preferred embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0064] The present disclosure relates to a battery controller, which is applied to a secondary battery and is used to control functions such as charging and / or discharging of the secondary battery.

[0065] The battery controller includes an outer shell, a circuit board and a solid electrode cap. The outer shell has a cavity inside, and an opening that passes through the cavity on the surface. The circuit board is located in the cavity, and includes a first surface and a second surface that are opposite to each other. The second surface is provided with circuit components, and the circuit components include charging and / or discharging devices. The solid electrode cap is a cylindrical solid structure made of a conductive metal material. The first surface of the circuit board is provided with an electrode cap pad. The solid electrode cap is welded to the circuit board through the electrode cap pad and is electrically connected to the circuit board. The solid electrode cap is exposed to the outer shell through the opening of the outer shell. Since the solid electrode cap is a cylindrical solid structure, it can be patch-welded to the electrode cap pad of the circuit board through the solid end face of the cylindrical solid structure. Therefore, compared with the traditional technology, the solid electrode cap can omit the brim used for welding with the circuit board, saving space, so that more space is reserved on the first surface of the circuit board to install other devices.

[0066] The battery controller can be applied to both AA batteries and AA batteries, and of course can also be applied to batteries of other models. The following uses the battery controller applied to AA batteries and AA batteries as an example to illustrate the technical solution of the present disclosure.

[0067] like Figures 1 to 3 As shown, Figure 1 This is an exploded view of the battery controller of the present disclosure applied to No. 5 battery. Figure 2 yes Figure 1 Top view of the battery controller after assembly. Figure 3 is along Figure 2 The battery controller 10 includes an outer shell 11 , a solid electrode cap 12 and a circuit board 13 .

[0068] The outer shell 11 is cylindrical and made of metal. The outer shell 11 has a cavity inside, and openings communicating with the cavity are arranged at two axial ends of the outer shell 11.

[0069] The outer shell 11 includes a cylindrical outer wall 111 and a stopper plate 112 which forms one axial end of the outer wall 111 and is perpendicular to the outer wall. The stopper plate 112 is arranged around the inner circumference of the outer wall 111, and its inner diameter is smaller than the outer diameter of the circuit board 13, so that the circuit board 13 can be confined inside the outer shell 11 to prevent it from falling out. A through hole is provided on the stopper plate 112, and the through hole is connected to the cavity.

[0070] The other end of the outer shell 11 relative to the limiting baffle 112 is provided with a plurality of pressure relief holes 113. More specifically, the plurality of pressure relief holes 113 are opened at the edge of the bottom of the outer wall 111 of the outer shell 11 and are spaced apart along the bottom periphery of the outer wall 111. The pressure relief holes 113 are used to discharge the gas generated by the battery cells to reduce the internal pressure of the battery.

[0071] Optionally, the pressure relief holes 113 are arranged at equal intervals along the periphery of the outer shell 11 .

[0072] Optionally, the pressure relief holes 113 may also be arranged at unequal intervals along the periphery of the outer shell 11 .

[0073] Optionally, the pressure relief hole 113 may be a rectangular notch or an arc-shaped notch.

[0074] The two pressure relief holes 113 are formed with protrusions 115 which are spot-welded to the outer shell of the battery cell.

[0075] The solid electrode cap 12 is made of conductive metal and is a cylindrical solid structure. The solid electrode cap 12 can be stamped from a steel plate of equal thickness. Both end surfaces of the solid electrode cap 12 along the axial direction are solid planes.

[0076] The circuit board 13 may be in the shape of a disk, and has an opposite first surface 131 and a second surface 132. A solid electrode cap 12 is disposed on the first surface 131. Circuit components are disposed on the second surface 132, and the circuit components may include components for controlling charging and / or discharging.

[0077] Combination Figure 4 and Figure 5 As shown, Figure 4 This is an exploded view of the circuit board and solid electrode cap of the battery controller of the present disclosure applied to AA batteries. Figure 5 yes Figure 4A cross-sectional view of a solid electrode cap and a circuit board after assembly. A plurality of electrode cap pads 1312 are provided on the first surface 131 of the circuit board 13, and solder such as solder paste can be coated on the electrode cap pads 1312 for welding the solid electrode cap 12.

[0078] A channel 1313 is formed between the electrode cap pads 1312 and the electrode cap pads 1312, and the channel 1313 separates adjacent electrode cap pads 1312. The function of the channel 1313 is, on the one hand, to isolate the solder coated on the electrode cap pads to prevent adjacent solders from focusing together, thereby avoiding stress concentration, dispersing stress, and preventing the solid electrode cap 12 from drifting during the welding process; on the other hand, to provide a flow outlet for the gas generated by the flux during the heating process, so that the gas is discharged through the channel 1313.

[0079] The solid electrode cap 12 has a circular outline, and a plurality of channels 1313 are distributed in a scattered manner with the center of the solid electrode cap covering area as the center of the circle.

[0080] Optionally, the channels may be in a cross shape, a M shape, a straight shape, or an S shape, and each first welding pad 1312 is distributed on both sides of the corresponding channel 1313 .

[0081] The electrode cap pads 1312 may be fan-shaped. The electrode cap pads 1312 and the channel 1313 together form a circular area, and the electrode cap pads 1312 are symmetrically distributed relative to the center of the circular area. The solid electrode cap 12 covers the circular area. The center of the circuit board 13 coincides with the center of the circular area, so that the solid electrode cap 12 and the circuit board 13 are concentrically and coaxially arranged. The concentricity and coaxiality means that the central axis of the solid electrode cap 12 along the axial direction coincides with the central axis of the circuit board 13 along the axial direction.

[0082] After the solder paste on the electrode cap pad 1312 is heated, the solid electrode cap 12 is attached to the electrode cap pad 1312 .

[0083] The electrode cap pad 1312 is designed as a partition structure with an isolated channel 1313. Therefore, when the solid electrode cap is placed on the electrode cap pad 1312 in the form of a patch and passes through the reflow soldering machine, the gas volatilized by the flux in the solder paste can diffuse out through the channel 1313. If the electrode cap pads 1312 are set as a circular structure without partitions and without isolated channels, when the flux of the solder paste on the electrode cap pad 1312 volatilizes, it is easy to push the solid electrode cap 12 open, causing the solid electrode cap 12 to be skewed. At the same time, compared with a whole piece of non-partitioned pad, during the soldering process of the circuit board 13 passing through the reflow soldering machine, the partition structure of the pad can control the surface stress of the melted solder paste on each pad within a certain range, which can effectively suppress the drift caused by the circuit board 13 and the solid electrode cap passing through the reflow soldering machine. If the solder paste is not applied evenly, the excess solder paste on the electrode cap pad 1312 can be discharged to the channel 1313.

[0084] The outer edge region of the electrode cap pad 1312 is also provided with a via hole 1314 for welding components.

[0085] A circle of shell pads 1311 is further provided at the edge of the first surface 131 , and the shell pads 1311 are connected to the inner surface of the limiting baffle 112 by welding methods such as reflow soldering.

[0086] The solid electrode cap 12 may be a solid positive electrode cap, and the circular area enclosed by the electrode cap pad 1312 and the channel 1313 corresponding to the solid positive electrode cap is smaller than half of the area of ​​the first surface of the circuit board 13 .

[0087] Continue reading Figure 1 and Figure 3 The battery controller 10 further includes an inner shell 15 located below the second surface 132 of the circuit board 13. The inner shell 15 includes a cylindrical shell body 152 and a support portion 151 disposed at one axial end of the shell body 152. The support portion 151 is bent toward the central axis of the inner shell 15 to form a support surface for supporting the circuit board 13. An inner shell pad 1321 is disposed at the edge of the second surface 132 of the circuit board 13, and the inner shell pad 1321 is welded to the support portion 151 of the inner shell 15.

[0088] The support portion 151 includes a plurality of limit bent legs 1511 formed at the top of the housing body 152 and spaced apart along the circumference of the housing body 152. Each limit bent leg 1511 bends and extends toward the central axis of the housing body 152 to form a support surface for supporting the circuit board 13. A circular chamfer is formed between each limit bent leg 1511 and the housing body 152, that is, an arc-shaped transition portion 153 is formed.

[0089] A first gap 181 for accumulating solder paste is formed between the transition portion 153 and the outer wall 111 and the inner shell pad 1321 of the circuit board 13. A second gap 182 for accumulating solder paste is formed between the circuit board 13 and the outer wall 111 of the outer shell 11, and the first gap 181 and the second gap 182 are connected. When the circuit board 13, the inner shell 15 and the outer shell 11 are soldered, for example, by reflow soldering, the solder paste coated on the outer shell pad 1311 and the inner shell pad 1321 of the circuit board 13 flows into the first gap 181 and the second gap 182 when heated, filling the first gap 181 and the second gap 182.

[0090] In addition, in order to facilitate the installation between the inner shell 15 and the outer shell 11, a gap is also reserved between the outer surface of the shell body of the inner shell 15 and the inner surface of the outer wall 111 of the outer shell 11, and part of the solder paste on the outer shell pad 1311 and the inner shell pad 1321 will also flow into the gap to fill the gap.

[0091] After the solder paste is heated and cured, the outer shell pad 1311 is bonded to the limit baffle 112 of the outer shell 11, and the inner shell pad 1321 is bonded to the support surface of the support portion 151 of the inner shell 15. After the solder paste is cured, it supports the circuit board together with the support portion 151. Since the solder paste has good shear resistance, the support portion 151 and the solder paste can provide a firm support for the circuit board 13 after bonding.

[0092] A groove 154 for accumulating solder paste is formed between the two limit bent legs 1511 of the support portion 151. When the solder paste is heated and solidified, the solder paste on the outer shell pad 1311 and the inner shell pad 1321 will also squeeze into the groove 154. In this way, the connection between the outer shell 11, the circuit board 13 and the inner shell 15 is further strengthened.

[0093] It should be noted here that tin wire or tin ball may be used instead of tin paste, and the gap or groove may be filled with fluid tin solder after the tin wire or tin ball is melted.

[0094] The bottom of the outer shell 11 exceeds the bottom of the inner shell 15 , so that the exceeding portion forms a positioning cylindrical surface structure 114 for positioning the outer shell of the columnar battery cell.

[0095] Please continue reading Figure 1 and Figure 3 The battery controller 10 also includes an electrode cap insulating sheet 14, which is disc-shaped and has a through hole in the middle. The solid electrode cap 12 is exposed to the outer shell 11 through the through hole. The electrode cap insulating sheet 14 covers the limit baffle 112 to isolate the solid electrode cap 12 and the outer shell 11 to prevent the two from conducting.

[0096] The second surface 132 of the circuit board 13 is also provided with an inner electrode pad for welding the inner electrode 16, and the inner electrode pad is also provided with an inner electrode positioning hole 134, and the positioning foot 163 of the inner electrode 16 is inserted into the inner electrode positioning hole 134, so as to ensure the circumferential positioning of the inner electrode 16 on the circuit board 13. The inner electrode 16 includes an electrode strip 161 and an inner electrode circuit board welding platform 164, and the inner electrode circuit board welding platform 164 forms an L shape with the electrode strip 161. The electrode contact platform 164 abuts against the inner electrode pad on the second surface 132 of the circuit board 13, so as to ensure the axial positioning of the inner electrode 16 on the circuit board 13. The inner electrode circuit board welding platform 164 increases the contact area between the inner electrode 16 and the circuit board 13, which is conducive to the passage of a larger current. At the same time, when the current passes through the inner electrode 16, the heat generated at the connection part between the inner electrode 16 and the circuit board 13 can be reduced.

[0097] The inner electrode 16 is also provided with a bending positioning groove 162 , which can locate the bending position on the one hand, and reduce stress concentration on the other hand, thereby ensuring that the inner electrode 16 is folded at the bending positioning groove 162 , thereby ensuring the consistency of the folding of the inner electrode 16 .

[0098] The movable end 167 of the inner electrode 16 is provided with a resistance welding choke 165 to increase the current path when the inner electrode 16 is resistance welded to the electrode boss of the lithium-ion battery cell, thereby increasing the welding strength. The movable end 167 of the inner electrode 16 may be in a strip shape.

[0099] Optionally, when the battery is small in size, the movable end 167 of the inner electrode 16 can be designed to be in a round shape to increase the contact area of ​​the electrode.

[0100] The battery controller 10 also includes an internal electrode insulating sheet 17, which has a notch 171. One end of the internal electrode 16 is welded to the second surface of the circuit board 13, and the other end passes through the notch 171 and is placed on the internal electrode insulating sheet 17, so that the other end of the internal electrode 16 is insulated from the circuit board 13.

[0101] In the above embodiment, the battery controller includes an outer shell 11 and an inner shell 15, but is not limited thereto. The battery controller may also omit the inner shell. In this case, the circuit board may be fixed by welding the limit baffle of the outer shell to the outer shell pad of the circuit board.

[0102] In the above embodiment, Figures 1 to 5 In the embodiment, the solid electrode cap 12 is a solid negative electrode cap, but it is not limited thereto. The solid electrode cap 12 may also be a solid negative electrode cap. Figure 6 and Figure 7 As shown, Figure 6This is a schematic diagram of a solid negative electrode cap of a battery controller for an AA battery and a circuit board that matches the negative electrode cap. Figure 7 yes Figure 6 The present disclosure provides a battery controller 10b for No. 5 batteries. The battery controller 10b includes an outer shell, a solid negative electrode cap 12b and a circuit board 13b. The outer shell can be made of the above-mentioned embodiment. Figure 1 The outer shell 11 structure in. The solid negative electrode cap 12b is made of conductive metal material, which is a cylindrical solid structure and does not have a brim structure. The first surface of the circuit board 13b is provided with a plurality of electrode cap pads 1312b, and a channel 1313b is formed between the electrode cap pads 1312b. Each of the electrode cap pads 1312b and the channel 1313b together form a circular area, and the area of ​​the circular area is greater than half of the area of ​​the first surface 131b of the circuit board 13b. The solid negative electrode cap 12b is soldered to the circuit board 13b through the electrode cap pads 1312b and is electrically connected to it. The solid negative electrode cap 12b is exposed to the outer shell through the opening of the outer shell.

[0103] The solid negative electrode cap 12b and the solid electrode cap 12 (ie, the solid positive electrode cap) have similar outlines, the main difference being that the diameter of the solid negative electrode cap 12b is larger than the diameter of the solid positive electrode cap, and the height is smaller than the height of the solid positive electrode cap.

[0104] The appearance structure and function of the electrode cap pad 1312b and the channel 1313b are similar to those in the previous embodiment. Figure 4 The difference is mainly reflected in that the area enclosed by the electrode cap pad 1312b and the channel 1313b corresponding to the solid negative electrode cap 12b is larger than the area enclosed by the electrode cap pad 1312 and the channel 1313 corresponding to the solid electrode cap 12, but the outer contours of the electrode cap pads and the channels of the two are similar. In addition, the electrode cap pad 1312b needs to be provided with corresponding avoidance grooves 1315b according to the vias 1314b of the welding components to prevent the vias 1314b from being blocked by solder paste, and the avoidance grooves 1315b are provided at different positions according to the different layouts of the vias.

[0105] Furthermore, the battery controller of this embodiment may also include structures such as an inner shell, an inner electrode, an inner electrode insulating sheet, and an electrode cap insulating sheet. Figures 1 to 5 The embodiments shown have the same structure, but can be appropriately adjusted in size.

[0106] In one embodiment, if Figures 8 to 10 As shown, Figure 8 This is an exploded view of the solid positive electrode cap and circuit board of the battery controller for the No. 7 battery disclosed in the present invention. Fig. 9 yes Figure 8Schematic diagram of the battery controller after assembly. Fig.10 yes Fig. 9 sectional view. The present disclosure provides a battery controller for No. 7 batteries, the battery controller comprising an outer shell, a solid positive electrode cap 12c and a circuit board 13c, the outer shell can adopt the structure of the outer shell 11 in the above-mentioned embodiment. The solid positive electrode cap 12c is made of conductive metal material, which is a cylindrical solid structure and does not have a brim structure. A plurality of electrode cap pads 1312c are provided on the first surface of the circuit board 13a, and channels 1313c are formed between the electrode cap pads 1312c. Each of the electrode cap pads 1312c and the channel 1313c together form a circular area, and the area of ​​the circular area is less than half of the area of ​​the first surface 131c of the circuit board 13c. The solid positive electrode cap 12c is soldered to the circuit board 13c through the electrode cap pads 1312c and is electrically connected to it. The solid positive electrode cap 12c is exposed to the outer shell through the opening of the outer shell.

[0107] The appearance structure and function of the electrode cap pad 1312c and the channel 1313c are similar to those in the previous embodiment. Figure 4 The difference is mainly reflected in the size, that is, the size of the circuit board 13c and the solid positive electrode cap 12c in this embodiment are smaller than the circuit board 13 and the solid electrode cap 12 applied to the No. 5 battery.

[0108] Furthermore, the battery controller of this embodiment may also include structures such as an inner shell, an inner electrode, an inner electrode insulating sheet, and an electrode cap insulating sheet. Figures 1 to 5 The embodiments shown have the same structure, but can be appropriately adjusted in size.

[0109] In one embodiment, if Figures 11 to 13 As shown, Fig.11 This is an exploded view of the solid negative electrode cap and circuit board of the battery controller of the AA battery of the present disclosure. Fig.12 yes Fig.11 Schematic diagram of the battery controller after assembly. Fig.13 yes Fig.12 The present disclosure provides a battery controller for No. 7 batteries, the battery controller includes an outer shell, a solid negative electrode cap 12d and a circuit board 13d, the outer shell can be made of the above embodiment Figure 1The outer shell 11 structure in the circuit board 13d. The solid negative electrode cap 12d is made of conductive metal, which is a cylindrical solid structure and does not have a brim structure. A plurality of electrode cap pads 1312d are provided on the first surface of the circuit board 13d, and channels 1313d are formed between the electrode cap pads 1312d. Each of the electrode cap pads 1312d and the channel 1313d together form a circular area, and the area of ​​the circular area is greater than half of the area of ​​the first surface 131d of the circuit board 13d. The solid negative electrode cap 12d is soldered to the circuit board 13d through the electrode cap pads 1312d and is electrically connected to it. The solid negative electrode cap 12d is exposed to the outer shell through the opening of the outer shell.

[0110] The appearance structure and function of the electrode cap pad 1312d and the channel 1313d are similar to those in the previous embodiment. Figure 6 In addition, the electrode cap pad 1312 needs to be provided with corresponding avoidance grooves 1315d according to the via holes 1314d of the welding components, and the avoidance grooves 1315d are provided at different positions according to different layouts of the via holes.

[0111] Furthermore, the battery controller of this embodiment may also include structures such as an inner shell, an inner electrode, an inner electrode insulating sheet, and an electrode cap insulating sheet. Figures 1 to 5 The embodiments shown have the same structure, but can be appropriately adjusted in size.

[0112] In one embodiment, the battery controller can also be applied to a soft pack battery, and the battery controller can be arranged at the positive terminal of the soft pack battery. The following is an example of the soft pack structure of a No. 7 battery. Fig.14 and Fig.15 As shown, Fig.14 is an exploded schematic diagram of a battery controller of the present disclosure applied to a soft-pack battery and including a solid positive electrode cap, Fig.15 yes Fig.14 The battery controller 10e comprises an outer shell 11e, a solid positive electrode cap 12e and a circuit board 13e.

[0113] The outer shell 11e includes a cylindrical outer wall 111e and a stopper plate 112e which forms one axial end of the outer wall 111e and is perpendicular to the outer wall. The stopper plate 112e is arranged around the inner circumference of the outer wall 111e. The solid positive electrode cap 12e is made of conductive metal and is a cylindrical solid structure without a brim structure. The structure of the circuit board 13e and the matching relationship between the circuit board 13e and the solid positive electrode cap 12e adopt the same structure as in the above embodiment. Figure 8 and Fig. 9 The structure and matching relationship of the corresponding circuit board 13c will not be repeated again.

[0114] The battery controller 10e also includes an inner shell 15e. The structure of the inner shell 15e is the same as that in the above embodiment. Figures 1 to 3 The structure of the inner shell 15 in the embodiment is similar, and the difference mainly lies in the number and arrangement of the limiting bent legs 1511e of the inner shell 15e. The number of limiting bent legs 1511e can be determined according to the size and connection strength of the inner shell 15e. In this embodiment, there are 5 limiting bent legs 1511e, and they are not evenly spaced.

[0115] Furthermore, the battery controller 10e further includes an electrode cap insulating sheet 14e and an inner electrode insulating sheet 17e. The electrode cap insulating sheet 14e and the inner electrode insulating sheet 17e can be made of the above-mentioned embodiment. Figures 1 to 3 The electrode cap insulating sheet 14 and the inner electrode insulating sheet 17 have the same structure.

[0116] Furthermore, the battery controller 10e further includes an inner electrode 16e, one end of which is welded to the second surface of the circuit board 13e, and the other end is folded and placed on the inner electrode insulating sheet 17e. The other end is a circular movable end.

[0117] In one embodiment, the battery controller can also be applied to a soft pack battery, and the battery controller can be arranged at the negative terminal of the soft pack battery. Fig.16 and Fig.17 As shown, Fig.16 is an exploded schematic diagram of a battery controller of the present disclosure applied to a soft-pack battery and including a solid negative electrode cap, Fig.17 yes Fig.16 The battery controller 10f comprises an outer shell 11f, a solid negative electrode cap 12f and a circuit board 13f.

[0118] The outer shell 11f includes a cylindrical outer wall 111f and a stopper plate 112f which forms one axial end of the outer wall 111f and is perpendicular to the outer wall. The stopper plate 112f is arranged around the inner circumference of the outer wall 111f. The solid negative electrode cap 12f is made of conductive metal and is a cylindrical solid structure without a brim structure. The structure of the circuit board 13f and the matching relationship between the circuit board 13f and the solid negative electrode cap 12f adopt the same structure as in the above embodiment. Fig.11 and Fig.12 The structure and matching relationship of the corresponding circuit board 13d will not be repeated again.

[0119] The battery controller 10f also includes an inner shell 15f. The structure of the inner shell 15f is the same as that of the previous embodiment. Fig.14 The structure of the inner shell 15e is the same as that of the inner shell 15e, which will not be repeated here.

[0120] Furthermore, the battery controller 10f further includes an inner electrode 16f, an electrode cap insulating sheet 14f and an inner electrode insulating sheet 17f. The inner electrode 16f, the electrode cap insulating sheet 14f and the inner electrode insulating sheet 17f can be made of the same material as in the previous embodiment. Figure 14 to Figure 15 The inner electrode 16e, the electrode cap insulating sheet 14e and the inner electrode insulating sheet 17e have the same structure.

[0121] like Fig.18 and Fig.19 As shown, Fig.18 is an exploded view of a cylindrical battery including a solid positive electrode cap of the present disclosure, Fig.19 yes Fig.18 The present disclosure provides a cylindrical battery 100, which includes a battery controller 10 and a cylindrical battery cell 20. The cylindrical battery cell 20 may be a lithium-ion battery cell, which is filled with an electrolyte. The cylindrical battery cell 20 has a positive electrode and a negative electrode. The positive electrode is connected to the positive electrode boss 21. The outer shell 24 of the cylindrical battery cell 20 is a steel shell. The steel shell is the negative electrode of the cylindrical battery cell 20.

[0122] The outer periphery of the positive electrode boss 21 of the columnar battery cell 20 is provided with a battery cell insulating sheet 23 . The battery cell insulating sheet 23 is annular and is used to isolate the positive electrode boss 21 from contact with the housing 24 to avoid short circuit.

[0123] The battery controller 10 is arranged at one end of the positive electrode of the columnar battery cell 20, and the inner electrode of the battery controller 10 is electrically connected to the positive electrode boss 21 of the columnar battery cell, so that the inner electrode of the battery controller 10 is electrically connected to the positive electrode of the columnar battery cell 20. The solid electrode cap 12 is electrically connected to the inner electrode through the circuit board, and the solid electrode cap 12 is a solid positive electrode cap. The outer shell 11 of the battery controller 10 is connected to the outer shell 24 of the columnar battery cell 20, so that the outer shell 11 of the battery controller 10 is connected to the negative electrode of the columnar battery cell 20.

[0124] In one embodiment, if Fig. 20 As shown, Fig. 20 1 is a schematic diagram of the structure of a cylindrical battery after assembly including a solid negative electrode cap according to the present disclosure. The present disclosure further provides a cylindrical battery 200, which includes a battery controller 10b and a cylindrical battery cell 20b. The cylindrical battery cell 20b may be a lithium-ion battery cell, which is filled with an electrolyte. The cylindrical battery cell 20b has a positive electrode and a negative electrode. The negative electrode is connected to the negative electrode boss. The outer shell 24b of the cylindrical battery cell 20b may be an aluminum shell, which is the positive electrode of the cylindrical battery cell 20b.

[0125] The battery controller 10b is arranged at one end of the negative electrode of the columnar battery cell 20b, and the inner electrode of the battery controller 10b is electrically connected to the negative electrode boss of the columnar battery cell, so that the inner electrode of the battery controller 10b is electrically connected to the negative electrode of the columnar battery cell 20b. The solid electrode cap 12b is electrically connected to the inner electrode through a circuit board, and the solid electrode cap 12b is a solid negative electrode cap. The outer shell 11b of the battery controller 10b is connected to the outer shell 24b of the columnar battery cell 20b, so that the outer shell 11b of the battery controller 10b is connected to the aluminum shell of the columnar battery cell 20b, and the outer shell 11b is electrically connected to the positive electrode of the columnar battery cell 20b.

[0126] In one embodiment, the battery controller can also be applied to the battery cells of the soft pack. The present disclosure provides a cylindrical battery, such as Fig.21 and Fig. 22 As shown, Fig.21 is an exploded view of a soft-pack cylindrical battery including a solid positive electrode cap of the present disclosure, Fig. 22 yes Fig.21 The schematic diagram of the structure of the cylindrical battery after assembly is shown in FIG. 300. The cylindrical battery 300 includes the above-mentioned battery controller 10e, a cylindrical battery cell 20e and a battery outer shell 24e. The battery controller 10e includes a solid positive electrode cap 12e. The outer shell 21e of the cylindrical battery cell 20e is a soft outer shell. After the cylindrical battery cell 20e is inserted into the battery outer shell 24e, the battery controller 10e is installed at one end of the positive electrode of the cylindrical battery cell 20e. The cylindrical battery cell 20e includes a positive electrode and a negative electrode. The positive electrode can be a positive electrode sheet 23e, and the negative electrode can be a negative electrode sheet 22e. The negative electrode sheet 22e extends from the negative end of the cylindrical battery cell 20e to the other end, and the negative electrode sheet 22e is connected to the battery outer shell 24e. The outer shell 11e of the battery controller 10e is connected to the battery outer shell 24e. The inner electrode of the battery controller 10e is connected to the positive electrode sheet 23e of the cylindrical battery cell 20e.

[0127] In one embodiment, the present disclosure provides a cylindrical battery, such as Fig.23 and Fig.24 As shown, Fig.23 is an exploded view of a soft-pack cylindrical battery including a solid negative electrode cap of the present disclosure, Fig.24 yes Fig.23The schematic diagram of the structure of the cylindrical battery after assembly is shown in FIG. 4 , wherein the cylindrical battery 400 includes the above-mentioned battery controller 10f, a cylindrical battery cell 20f and a battery outer shell 24f. The battery controller 10f includes a solid negative electrode cap 12f. The outer shell 21f of the cylindrical battery cell 20f is a soft outer shell. After the cylindrical battery cell 20f is inserted into the battery outer shell 24f, the battery controller 10f is installed at one end of the cylindrical battery cell 20f. The cylindrical battery cell 20f includes a positive electrode and a negative electrode, the positive electrode can be a positive electrode sheet 22f, and the negative electrode can be a negative electrode sheet 23f. The positive electrode sheet 22f extends from the positive end of the cylindrical battery cell 20f to the other end, and the positive electrode sheet 22f is connected to the battery outer shell 24f. The outer shell 11f of the battery controller 10f is connected to the battery outer shell 24f. The inner electrode of the battery controller 10f is connected to the negative electrode sheet 23f of the cylindrical battery cell.

[0128] The above are only preferred feasible embodiments of the present invention and are not intended to limit the protection scope of the present invention. All equivalent structural changes made using the contents of the present invention description and drawings are included in the protection scope of the present invention.

Claims

1. A battery controller, characterized in that: include: An outer shell having a cavity inside and an opening penetrating the cavity on its surface; A circuit board is located in the cavity and includes a first surface and a second surface opposite to each other, wherein the second surface is soldered with circuit components; and The solid electrode cap is made of conductive metal and is a cylindrical solid structure. Both end surfaces of the solid electrode cap along the axial direction are solid planes. The first surface of the circuit board is provided with an electrode cap welding pad. The solid electrode cap is welded to the circuit board through the electrode cap welding pad and is electrically connected to the circuit board. The solid electrode cap is exposed to the outer shell through the opening.

2. The battery controller according to claim 1, characterized in that: A plurality of electrode cap pads are arranged on the first surface of the circuit board, channels are formed between the electrode cap pads, and the solid electrode cap covers the area formed by the electrode cap pads and the channels and is bonded by soldering.

3. The battery controller according to claim 2, characterized in that: The solid electrode cap has a circular outline, and the plurality of channels are distributed in a scattered manner with the center of the area covered by the solid electrode cap as the center of the circle.

4. The battery controller according to claim 2, characterized in that: Each electrode cap pad and the channel together form a circular area, and the solid electrode cap covers the circular area.

5. The battery controller according to claim 4, characterized in that: Each of the electrode cap pads is symmetrical with respect to the center of the circular area.

6. The battery controller according to claim 5, characterized in that: The outline of the circuit board is circular, the center of the circular area is located at the center of the circuit board, and the solid electrode cap is concentric and coaxial with the circuit board.

7. The battery controller according to claim 2, characterized in that: The channel is in a cross shape, a M shape, a straight shape or an S shape, and each electrode cap pad is distributed on both sides of the corresponding channel.

8. The battery controller according to claim 1, characterized in that: A shell welding pad is formed in a region near the edge of the first surface, and a limit baffle is provided at one end of the shell body facing the solid electrode cap, and the limit baffle is welded to the shell welding pad.

9. The battery controller according to claim 8, characterized in that: The battery controller further comprises an inner shell located below the second surface of the circuit board, the inner shell comprising a cylindrical shell body and a support portion arranged at one axial end of the shell body, the support portion being bent toward the central axis of the inner shell to form a support surface for supporting the circuit board; An inner shell pad is disposed in a region near the edge of the second surface of the circuit board, and the support surface is connected to the circuit board by welding through the inner shell pad.

10. The battery controller according to claim 9, characterized in that: The battery controller also includes an inner electrode. The second surface of the circuit board is also provided with an inner electrode pad. The inner electrode is welded to the inner electrode pad. The inner electrode is electrically connected to the solid electrode cap through circuit components of the circuit board.

11. The battery controller according to claim 1, characterized in that: The solid electrode cap is a solid positive electrode cap or a solid negative electrode cap.

12. A cylindrical battery, characterized in that: include: A cylindrical battery cell having a positive electrode and a negative electrode; and The battery controller as described in any one of claims 1 to 11, wherein the battery controller is arranged at one end of the positive electrode of the columnar battery cell, the inner electrode of the battery controller is electrically connected to the positive electrode of the columnar battery cell, the outer shell of the battery controller is electrically connected to the negative electrode of the columnar battery cell, and the solid electrode cap is a solid positive electrode cap.

13. The cylindrical battery according to claim 12, characterized in that: The columnar battery cell is a soft-pack battery cell, the negative electrode disposed at one end of the columnar battery cell is a negative electrode sheet, the negative electrode sheet extends from one end to the other end of the columnar battery cell, the columnar battery cell is inserted into a battery outer shell, the negative electrode sheet is welded to the battery outer shell, and the outer shell of the battery controller is connected to the battery outer shell; The positive electrode disposed at the other end of the columnar battery cell is a positive electrode sheet, and the positive electrode sheet is connected to the inner electrode of the battery controller.

14. The cylindrical battery according to claim 12, characterized in that: The outer shell of the columnar battery cell is a steel shell, the steel shell of the columnar battery cell is the negative electrode of the columnar battery cell, and the outer shell of the battery controller is connected to the steel shell; The columnar battery cell has a positive electrode boss, the positive electrode is connected to the positive electrode boss, and the positive electrode boss is connected to the inner electrode of the battery controller.

15. A cylindrical battery, characterized in that: include: A cylindrical battery cell having a positive electrode and a negative electrode; and The battery controller as described in any one of claims 1 to 11, wherein the battery controller is arranged at one end of the negative electrode of the columnar battery cell, the inner electrode of the battery controller is electrically connected to the negative electrode of the columnar battery cell, the outer shell of the battery controller is connected to the positive electrode of the columnar battery cell, and the solid electrode cap is a solid negative electrode cap.

16. The cylindrical battery according to claim 15, characterized in that: The columnar battery cell is a soft-pack battery cell, the positive electrode disposed at one end of the columnar battery cell is a positive electrode sheet, the positive electrode sheet extends from one end to the other end of the columnar battery cell, the columnar battery cell is inserted into a battery outer shell, the positive electrode sheet is welded to the battery outer shell, and the outer shell of the battery controller is connected to the battery outer shell; The negative electrode disposed at the other end of the columnar battery cell is a negative electrode sheet, and the negative electrode sheet is connected to the inner electrode of the battery controller.

17. The cylindrical battery according to claim 15, characterized in that: The outer shell of the columnar battery core is an aluminum shell, the aluminum shell of the columnar battery core is the positive electrode of the columnar battery core, and the outer shell of the battery controller is connected to the aluminum shell; The columnar battery cell has a negative electrode boss, the negative electrode is connected to the negative electrode boss, and the negative electrode boss is connected to the inner electrode of the battery controller.

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