Battery control circuit board assembly, battery and electric device

Abstract

The invention relates to the technical field of energy storage devices, and particularly discloses a battery control circuit board assembly, a battery and an electric device. The battery control circuit board assembly comprises a battery control circuit board which is provided with a printed circuit, and the printed circuit forms an electromagnetic coil; the rotor is matched with the electromagnetic coil, the rotor comprises a rotating disc and a permanent magnet, the rotating disc is rotatably arranged on the battery control circuit board, and the permanent magnet is arranged on the rotating disc; and the fan blades are arranged on the turntable. By applying the battery control circuit board assembly, the battery and the electric device provided by the invention, heat can be dissipated from the interior of the battery, the overheating of the battery and potential safety hazards caused by the overheating are avoided, the service life of the battery is prolonged, the charging efficiency is improved, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and more specifically, to a battery control circuit board assembly, a battery, and an electrical device. Background Art

[0002] In recent years, with the growth of mobile office and digitalization needs, the demand for fast-charging and long-lasting batteries has also gradually increased. In the market, high-rate fast-charging batteries have broad development prospects. High-rate fast-charging technology can significantly improve the charging speed of power devices such as laptops, provide power support to users more conveniently and quickly, and improve user experience and work efficiency. High-rate fast-charging batteries can not only charge quickly, but also provide a longer battery life, meeting users' needs for battery life in mobile office and daily use. Batteries with fast charging and long battery life enhance the product competitiveness of power devices.

[0003] However, with the development of battery fast charging speed and capacity, the overcurrent is also getting bigger and bigger, causing the electronic components on the control circuit board and the parts inside the battery to heat up more seriously, which has an adverse effect on the battery's service life and safety. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a battery control circuit board assembly, a battery and an electrical device, the structural design of which can effectively solve the problem that the battery generates a lot of heat, affecting its service life and safety.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A battery control circuit board assembly, comprising:

[0007] A battery control circuit board, wherein a printed circuit is provided on the battery control circuit board, and the printed circuit forms an electromagnetic coil;

[0008] A rotor, cooperating with the electromagnetic coil, the rotor comprising a turntable and a permanent magnet, the turntable being rotatably disposed on the battery control circuit board, and the permanent magnet being disposed on the turntable;

[0009] The fan blades are arranged on the rotating disk.

[0010] Optionally, in the above-mentioned battery control circuit board assembly, a plurality of the electromagnetic coils are provided on the battery control circuit board, each of the electromagnetic coils is in a spiral shape with N turns, wherein N is a positive integer, and the plurality of electromagnetic coils are distributed in a circular array with the rotating axis of the turntable as the center.

[0011] Optionally, in the above-mentioned battery control circuit board assembly, the battery control circuit board includes a multi-layer substrate, each layer of the substrate is respectively provided with the electromagnetic coil, and the electromagnetic coils at corresponding positions on each layer of the substrate are connected.

[0012] Optionally, in the above-mentioned battery control circuit board assembly, the outer diameter of the turntable is not greater than the outer diameter of the circular array distribution, wherein the outer diameter of the circular array distribution is the maximum distance from the electromagnetic coil to the rotating shaft.

[0013] Optionally, in the above-mentioned battery control circuit board assembly, the rotor also includes a rotating shaft, a circuit board through hole is provided on the battery control circuit board, the rotating shaft includes an intermediate shaft portion, a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are arranged at opposite ends of the intermediate shaft portion, the first connecting portion is rotatably arranged in the circuit board through hole, the second connecting portion is connected to the fan blades, and the intermediate shaft portion is connected to the turntable.

[0014] Optionally, in the above-mentioned battery control circuit board assembly, the outer diameter of the first connecting part is smaller than the outer diameter of the intermediate shaft part, a step surface is formed between the first connecting part and the intermediate shaft part, the step surface is against the battery control circuit board, and there is a gap between the turntable and the battery control circuit board.

[0015] Optionally, in the above-mentioned battery control circuit board assembly, the battery control circuit board includes a board body and a gasket, the circuit board through hole is arranged on the board body, the gasket is arranged on the circuit board through hole, and the gasket is provided with a gasket through hole, and the first connecting portion is arranged on the gasket through hole.

[0016] Optionally, in the above-mentioned battery control circuit board assembly, the gasket has a flange at one end facing the fan blade, the inner diameter of the intermediate shaft portion is larger than the diameter of the gasket through hole, and the step surface abuts against the flange.

[0017] Optionally, in the above-mentioned battery control circuit board assembly, the fan blade comprises:

[0018] The fan blade body comprises a central axis portion and a plurality of blades arranged on the central axis portion, the central axis portion is provided with a fan blade through hole along the axial direction and a fixing groove along the radial direction, the rotating shaft is arranged in the fan blade through hole, and a pin hole is arranged on the rotating shaft corresponding to the fixing groove;

[0019] A latch pin is disposed in the pin hole and the fixing groove;

[0020] A cover cap is arranged at one end of the blade away from the battery control circuit board, and the cover cap is connected to the rotating shaft and abuts against the blade.

[0021] Optionally, the battery control circuit board assembly further includes an electromagnetic shielding cover, which is arranged on the battery control circuit board and covers the permanent magnet and the electromagnetic coil.

[0022] The battery control circuit board assembly provided by the present application is applied, the printed circuit on the battery control board is used as the electromagnetic coil of the motor, and the rotor of the motor is rotatably arranged on the battery control circuit board. The electromagnetic coil is driven by alternating current, and the magnetic circuit between the electromagnetic coil and the permanent magnet drives the turntable to rotate, thereby driving the fan blades to rotate and driving forced air convection, so that the heat generated by the electronic components on the battery control circuit board and the internal components of the battery is convected to the external space of the battery through air, thereby achieving the requirement of rapid heat dissipation.

[0023] In summary, when the battery control circuit board assembly provided by the present application is applied to the battery, on the one hand, it can dissipate heat from the inside of the battery, avoid battery overheating and the resulting safety hazards, and extend the service life of the battery, which is particularly suitable for high-rate fast-charging batteries. On the other hand, battery overheating can lead to a decrease in charging efficiency. The present application can achieve rapid heat dissipation of the battery, thereby keeping the battery in a suitable temperature range, improving the charging efficiency, and enabling the user to complete the charging process faster when using it, thereby improving the user's experience. Furthermore, battery overheating can easily cause safety problems, such as overcharging, over-discharging, and leakage. The present application can reduce the risk of battery abnormalities through the above-mentioned heat dissipation structure, improve the safety of use, and protect the user's property and personal safety. In addition, the device using the battery control circuit board assembly will not overheat during the charging process, thereby avoiding the user from contacting the overheated device and improving the user's experience. Avoiding overheating can also reduce the noise and temperature perception during equipment operation and improve comfort.

[0024] In order to achieve the above purpose, the present application also provides a battery and an electrical device, which includes any of the above battery protection boards. Since the above battery protection board has the above technical effects, the battery and the electrical device having the battery protection board should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a schematic diagram of an exploded structure of a battery control circuit board assembly according to a specific embodiment of the present application;

[0027] Figure 2 is a cross-sectional schematic diagram of a battery control circuit board assembly;

[0028] Figure 3 This is a schematic diagram of the front structure of the battery control circuit board;

[0029] Figure 4 This is a schematic diagram of the back structure of the battery control circuit board;

[0030] Figure 5 This is a schematic diagram of the exploded structure of the rotor;

[0031] Figure 6 is a schematic diagram of the main view of the rotor;

[0032] Figure 7 is a schematic side view of the rotor;

[0033] Figure 8 is a structural schematic diagram of the rotating shaft;

[0034] Fig. 9 is a schematic diagram of the main view of the gasket;

[0035] Fig.10 is a top view schematic diagram of the gasket;

[0036] Fig.11 It is a schematic diagram of the assembly cross section of the gasket;

[0037] Fig.12 It is a schematic diagram of the main body of the fan blade when viewed from above;

[0038] Fig.13 is a schematic diagram of the structure of the latch;

[0039] Fig.14 is a top view schematic diagram of an electromagnetic shielding cover;

[0040] Fig.15 for Fig.14 AA cross-sectional diagram of ;

[0041] Fig.16 Schematic diagram of the assembly of the battery cell and the battery control circuit board;

[0042] Fig.17 This is a schematic diagram of the structure of a battery according to a specific embodiment of the present application;

[0043] Fig.18 for Fig.17 Schematic diagram of the explosion structure;

[0044] Fig.19 A schematic diagram of the structure of a battery according to another specific embodiment of the present application;

[0045] Fig. 20 for Fig.19Schematic diagram of the explosion structure;

[0046] Fig.21 for Fig.19 Schematic diagram of the AA section.

[0047] Reference numerals:

[0048] 10-battery control circuit board assembly; 20-battery cell; 30-housing; 40-elastic pad; 50-label;

[0049] 1-battery control circuit board; 2-rotor; 3-fan blades; 4-electromagnetic shielding cover;

[0050] 11-electromagnetic coil; 12-cell connection part; 13-connector terminal wire; 141-integrated circuit; 142-battery management chip; 143-power field effect transistor; 144-metal-oxide semiconductor field effect transistor; 145-Zener diode; 15-circuit board through hole; 16-board body; 17-gasket; 171-gasket through hole; 172-flange; 18-gasket pad; 19-shielding cover pad;

[0051] 21-turntable; 22-permanent magnet; 23-rotating shaft; 231-middle shaft portion; 232-first connecting portion; 233-second connecting portion; 234-step surface; 235-pin hole; 2311-first middle portion; 2312-second middle portion;

[0052] 31-fan blade body; 32-latch pin; 33-cap; 311-central axis; 312-blade; 313-fan blade through hole; 314-fixing groove;

[0053] 41-protrusion; 42-shielding cover through hole; 43-connecting ear; 44-through hole;

[0054] 201 - pole ear; 301 - air inlet; 302 - air outlet; 303 - first shell; 304 - second shell; 501 - ventilation hole; 502 - first label; 503 - second label. DETAILED DESCRIPTION

[0055] The embodiments of the present application disclose a battery control circuit board assembly, a battery, and an electrical device to achieve rapid heat dissipation of the battery, extend the service life of the battery, and improve the safety of the battery.

[0056] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] The battery control circuit board is used to transfer the battery cell and the external electronic device, and can realize the control functions such as charging and discharging of the battery cell, and can also realize the protection of the battery cell as needed. According to the functions to be realized, the battery control circuit board is provided with corresponding devices, and during the operation of the battery control circuit board, at least some of the devices will generate heat. And the increase of the fast charging speed and capacity of the battery, the more heat the device usually generates. In order to realize the rapid heat dissipation of the battery control circuit board and the battery as a whole, a motor is arranged on the battery control circuit board in the present application, and the printed circuit of the battery control circuit board is used as the electromagnetic coil of the motor, and the rotor of the motor drives the fan blades to rotate to realize forced convection of air, thereby improving the heat dissipation efficiency of the battery control circuit board itself, and at the same time, it can improve the overall heat dissipation efficiency of the battery provided with the battery control circuit board assembly.

[0058] In some embodiments, see Figure 1-Figure 5 , the battery control circuit board assembly provided in the present application includes a battery control circuit board 1, a rotor 2 and a fan blade 3. Among them, a printed circuit is provided on the battery control circuit board 1, and the printed circuit forms an electromagnetic coil 11. The battery control circuit board 1 is provided with a wound printed circuit, and it is used as the electromagnetic coil 11 of the motor, such as the electromagnetic coil 11 of the axial flux motor. It can be understood that the battery control circuit board 1 can be provided with a corresponding printed circuit to meet the control functions such as charging and discharging. Its specific structure can refer to the setting of the conventional battery control circuit board 1, and will not be repeated here. In the present application, a printed circuit is wound on the battery control circuit board 1 as an electromagnetic coil 11 to form the stator of the motor. By way of example, the copper trace on the battery control circuit board 1 is used as the electromagnetic coil 11, specifically, the microstrip line on the battery control circuit board 1 is used as the electromagnetic coil 11.

[0059] The rotor 2 cooperates with the electromagnetic coil 11, and the rotor 2 includes a turntable 21 and a permanent magnet 22. The turntable 21 is rotatably arranged on the battery control circuit board 1, and the permanent magnet 22 is arranged on the turntable 21. Exemplarily, the turntable 21 is parallel to the electromagnetic coil 11, and the corresponding permanent magnet 22 is parallel to the electromagnetic coil 11. The electromagnetic coil 11 cooperates with the rotor 2 to form an axial flux motor. By controlling the electromagnetic field generated in the electromagnetic coil 11, the dynamically changing magnetic field between the rotor 2 and the electromagnetic coil 11 is synchronized, and the dynamically changing synchronous magnetic field drives the rotor 2 to rotate. Specifically, a plurality of permanent magnets 22 are provided, and the plurality of permanent magnets 22 are evenly distributed on the turntable 21 along the circumferential direction. Exemplarily, the permanent magnet 22 is cylindrical, and the diameter of the permanent magnet 22 ranges from 2 to 4 mm. It can be understood that the shape of the turntable 21 is not limited to a disc, and can also be set to a square or other shape according to space and other conditions. Exemplarily, the permanent magnet 22 includes a magnet.

[0060] The fan blades 3 are arranged on the turntable 21. The specific shape of the fan blades 3 can refer to the setting of the fan blades 3 of the conventional fan, and is not specifically limited here. The number of blades 312 of the fan blades 3 can also be set as needed. For example, the fan blades 3 include a plurality of blades 312. The fan blades 3 are arranged on the turntable 21, and when the rotor 2 rotates under the action of the electromagnetic coil 11, the fan blades 3 rotate accordingly, thereby driving the air flow, that is, realizing forced convection of the air. The rotating shaft 23 of the fan blades 3 is specifically coaxial with the rotating shaft 23 of the turntable 21.

[0061] The battery control circuit board assembly provided by the present application is applied, and the printed circuit on the battery control board is used as the electromagnetic coil 11 of the motor, and the rotor 2 of the motor is rotatably arranged on the battery control circuit board 1. The electromagnetic coil 11 is driven by alternating current, and the magnetic circuit between the electromagnetic coil 11 and the permanent magnet 22 drives the turntable 21 to rotate, thereby driving the fan blades 3 to rotate, driving forced air convection, so that the heat generated by the electronic components on the battery control circuit board 1 and the internal components of the battery is convected to the external space of the battery through air, thereby achieving the requirement of rapid heat dissipation.

[0062] In summary, when the battery control circuit board assembly provided by the present application is applied to the battery, on the one hand, it can dissipate heat from the inside of the battery, avoid battery overheating and the resulting safety hazards, and extend the service life of the battery, which is particularly suitable for high-rate fast-charging batteries. On the other hand, battery overheating can lead to a decrease in charging efficiency. The present application can achieve rapid heat dissipation of the battery, thereby keeping the battery in a suitable temperature range, improving the charging efficiency, and enabling the user to complete the charging process faster when using it, thereby improving the user's experience. Furthermore, battery overheating can easily cause safety problems, such as overcharging, over-discharging, and leakage. The present application can reduce the risk of battery abnormalities, improve safety of use, and protect the user's property and personal safety through the above-mentioned heat dissipation structure. In addition, the device using the battery control circuit board assembly will not overheat during the charging process, thereby avoiding the user from contacting the overheated device and improving the user's experience. And avoiding overheating can also reduce the noise and temperature perception during the operation of the device and improve comfort.

[0063] In some embodiments, see Figure 3-Figure 4 , a plurality of electromagnetic coils 11 are provided on the battery control circuit board 1, each electromagnetic coil 11 is in a spiral shape with N turns, wherein N is a positive integer, and the plurality of electromagnetic coils 11 are distributed in a circular array with the rotating shaft 23 of the turntable 21 as the center. Exemplarily, N is 10, that is, 10 turns are provided on each spiral of the electromagnetic coil 11 on the control circuit board to generate a larger magnetic field to drive the rotor 2 to rotate. It can be understood that, according to the requirements of the magnetic field size and the space on the battery control circuit board 1, the number of turns of the electromagnetic coil 11 can be increased or decreased accordingly, and is not limited to 10 turns.

[0064] In some embodiments, the battery control circuit board 1 includes a multi-layer substrate, each layer of the substrate is provided with an electromagnetic coil 11, and the electromagnetic coils 11 at corresponding positions on each layer of the substrate are connected. The battery control circuit board 1 is a multi-layer board. Exemplarily, the battery control circuit board 1 includes four layers of substrates, each layer of the substrate is provided with an electromagnetic coil 11, and the coils are stacked (there are coils on each layer of the four layers of the substrate) and connected to each other to form a continuous trace, so that each group of electromagnetic coils 11 has more turns, so that a larger magnetic field can be generated, so that a larger torque can be provided to drive the rotor 2 to rotate.

[0065] In some embodiments, the shape of the battery control circuit board 1 can be set according to the shape of the battery cell 20. For example, the battery control circuit board 1 is in the shape of a rectangular plate, and the length E of the battery control circuit board 1 is not greater than the width B of the battery cell 20. The thickness I of the battery control circuit board 1 ranges from 0.6 to 2.0 mm, and the specific thickness value is set according to the internal overcurrent layout.

[0066] In some specific examples, a cell connection portion 12 is provided on the battery control circuit board 1 to electrically connect with the tab 201 of the cell 20. The cell connection portion 12 can be made of a metal conductor, such as nickel, copper, aluminum or other metal materials. The cell connection portion 12 and the tab 201 can be fixed by welding by reflow soldering, laser welding, resistance welding, ultrasonic welding or the like. In some specific examples, the battery control circuit board 1 is connected to an external device through a connector terminal line 13, such as a charging and discharging connection with a port of the system.

[0067] The devices on the battery control circuit board 1 include but are not limited to IC (integrated circuit) 141, Gauge IC (battery management chip) 142, Power Mosfet (power field effect transistor) 143, Signal Mos (metal-oxide semiconductor field effect transistor) 144, Zener diode 145, ROSE, resistor, transistor and the like.

[0068] In some embodiments, the outer diameter N of the turntable 21 is not greater than the outer diameter of the circumferential array distribution, wherein the outer diameter of the circumferential array distribution is the maximum distance from the electromagnetic coil 11 to the rotating shaft 23. The electromagnetic field generated by the electromagnetic coil 11 drives the permanent magnet 22 of the rotor 2 to rotate, and the turntable 21 is located as a whole within the distribution range of the electromagnetic coil 11, ensuring that the electromagnetic coil 11 effectively drives the rotor 2.

[0069] In some embodiments, see Figure 4-Figure 8, the rotor 2 also includes a rotating shaft 23, a circuit board through hole 15 is provided on the battery control circuit board 1, the rotating shaft 23 includes an intermediate shaft portion 231, a first connecting portion 232 and a second connecting portion 233, the first connecting portion 232 and the second connecting portion 233 are arranged at opposite ends of the intermediate shaft portion 231, the first connecting portion 232 is rotatably arranged in the circuit board through hole 15, the second connecting portion 233 is connected to the fan blade 3, and the intermediate shaft portion 231 is connected to the turntable 21. It can be understood that the intermediate shaft portion 231, the first connecting portion 232 and the second connecting portion 233 can be an integral structure or a split structure with fixed connection. The second connecting portion 233 and the fan blade 3 can be an integral structure or a split structure with fixed connection. The rotating connection between the turntable 21 and the battery control circuit board 1 is conveniently realized by the rotating shaft 23. Exemplarily, a copper leakage perforation, i.e., a circuit board through hole 15, is arranged in the middle position of the distribution of the electromagnetic coil 11, and the diameter H of the circuit board through hole 15 ranges from 2 to 4 mm.

[0070] In some embodiments, the outer diameter of the first connection portion 232 is smaller than the outer diameter of the intermediate shaft portion 231, and a step surface 234 is formed between the first connection portion 232 and the intermediate shaft portion 231, and the step surface 234 abuts against the battery control circuit board 1, and there is a gap between the turntable 21 and the battery control circuit board 1. By setting the step surface 234 for axial limitation, there is a gap between the turntable 21 and the battery control circuit board 1 without direct contact, thereby avoiding friction between the turntable 21 and the battery control circuit board 1 when the turntable 21 rotates, avoiding friction and wear, and at the same time, the turntable 21 can be driven to rotate with a small force.

[0071] In some embodiments, see Figure 2 and Figure 9-11 The battery control circuit board 1 includes a board body 16 and a gasket 17. The circuit board through hole 15 is provided in the board body 16, and the gasket 17 is provided in the circuit board through hole 15. The gasket 17 is provided with a gasket through hole 171, and the first connecting portion 232 is provided in the gasket through hole 171. The gasket through hole 171 is provided to cooperate with the rotating shaft 23 to achieve axial limitation of the rotating shaft 23. On the one hand, it is convenient to select gaskets of different thicknesses according to needs, and the gasket can be made of smooth and wear-resistant materials to reduce friction and friction wear. On the other hand, when the gasket is damaged due to wear and other reasons, only the gasket can be replaced without maintaining the board body 16.

[0072] In some embodiments, the end of the gasket 17 facing the blade 3 has a flange 172, the diameter of the intermediate shaft portion 231 is larger than the diameter of the gasket through hole 171, and the step surface 234 abuts against the flange 172. The gasket cooperates with the rotor 2 to achieve axial positioning of the rotor 2, further reducing friction.

[0073] Furthermore, the battery control circuit board 1 is provided with a gasket pad 18 outside the circuit board through hole 15, which is used to be fixedly connected with the flange 172 of the gasket. Specifically, a circle of copper leakage pads, namely the gasket pad 18, is provided around the circuit board through hole 15. Figure 3 , the outer diameter G of the pad 18 is in the range of 3 to 5 mm.

[0074] In some specific examples, the gasket 17 is made of metal materials such as copper and nickel, and the wall thickness of the gasket 17 is in the range of 0.15 mm. Figure 3 and Figure 4 , Fig. 9 and Fig.10 , the outer diameter J of the flange 172 is equal to the outer diameter G of the gasket pad 18, the sum of the diameter K of the gasket through hole 171 and the gasket wall thickness is equal to the diameter H of the circuit board through hole 15, the length L from the end of the flange 172 away from the fan blade 3 to the end of the gasket 17 away from the fan blade 3 is not greater than the thickness I of the battery control circuit board 1, and the thickness M of the flange 172 ranges from 0.15 to 0.4 mm. During assembly, the gasket 17 is assembled horizontally downward into the circuit board through hole 15 of the horizontally placed battery control circuit board 1, and the gasket 17 is connected to the gasket pad 18 by soldering.

[0075] For some specific examples, see Figure 6-Figure 8 The intermediate shaft portion 231 includes a first intermediate portion 2311 and a second intermediate portion 2312, and the outer diameter O of the second intermediate portion 2312 is greater than the outer diameter Z of the first intermediate portion 2311. Specifically, the outer diameter Y of the first connecting portion 232 is equal to the outer diameter T of the second connecting portion 233, and the outer diameter Y of the first connecting portion 232 is slightly smaller than the inner diameter K of the gasket through hole 171 to avoid interference when the rotating shaft 23 is installed in the battery control circuit board 1. The outer diameter Z of the first intermediate portion 2311 is equal to the outer diameter T of the second connecting portion 233, and the outer diameter Z of the first intermediate portion 2311 is greater than the inner diameter K of the gasket through hole 171, so as to play a limiting role and make the rotating shaft 23 stand on the control circuit board. The height W of the first connection portion 232 is greater than the thickness I of the battery control circuit board 1, the height S of the first middle portion 2311 is greater than zero, the height R of the second connection portion 233 is greater than the thickness V of the turntable 21, and the spacing U between the end of the second connection portion 233 and the turntable 21 is greater than zero, so that the turntable 21 is in a suspended state, avoiding contact with other components and reducing friction when the turntable 21 rotates. The thickness V of the turntable 21 is generally in the range of 2.0 mm to 4.0 mm. The length R of the second connection portion 233 is generally in the range of 4.5 mm to 7.0 mm.

[0076] In some embodiments, see Figure 1-Figure 2 , Figure 12-13The fan blade 3 includes a fan blade body 31, a latch 32 and a cap 33. The fan blade body 31 includes a central axis 311 and a plurality of blades 312 arranged on the central axis 311. The central axis 311 is provided with a fan blade through hole 313 along the axial direction and a fixing groove 314 along the radial direction. The rotating shaft 23 is provided in the fan blade through hole 313. The rotating shaft 23 is provided with a pin hole 235 corresponding to the fixing groove 314. The latch 32 is arranged in the pin hole 235 and the fixing groove 314. The cap 33 is arranged at one end of the blade 312 away from the battery control circuit board 1. The cap 33 is connected to the rotating shaft 23 and abuts against the blade 312. It is understandable that when the turntable 21 is assembled on the rotating shaft 23, the pin hole 235 should be exposed, that is, the turntable 21 will not block the pin hole 235. Specifically, the distance Q from the pin hole 235 to the turntable 21 is greater than the spacing U between the end of the second connecting portion 233 and the turntable 21, which is generally 1.0~2.0mm. The latch 32 can axially limit the fan blade body 31 and the rotating shaft 23 to prevent the two from rotating relative to each other, so the rotation of the rotating shaft 23 can drive the fan blade body 31 to rotate synchronously. Through the cooperation of the latch 32 and the cap 33, the fan blade body 31 can be axially limited, and then the fan blade body 31 can be fixed to the rotating shaft 23, so that the fan blade body 31 can be accurately positioned, and the assembly is convenient and the connection is reliable.

[0077] In some specific examples, the outer diameter of the plug 32 gradually increases from the first end to the second end to facilitate assembly. Figure 7 and Fig.13 , the outer diameter of the pin 32 satisfies: j<Q<l, where j is the outer diameter of the first end of the pin 32, l is the outer diameter of the second end of the pin 32, Q is the distance from the pin hole 235 to the end face of the turntable 21, Q=(j+l) / 2. The length k of the pin 32 is not greater than the outer diameter N of the turntable 21. The diameter n of the blade 312 is less than the outer diameter d of the electromagnetic shielding cover 4. The diameter q of the blade through hole 313 is slightly greater than the outer diameter T of the second connecting portion 233. The thickness m of the blade 312 is less than the length R of the second connecting portion 233.

[0078] Specifically, the fixing groove 314 is arranged below the fan blade through hole 313, and the cross-section of the fixing groove 314 is arc-shaped to cooperate with the pin 32. The edge of the fixing groove 314 is chamfered o, and the value of o is generally 0.5~3.0mm. The diameter p of the fixing groove 314 is equal to the distance Q from the pin hole 235 to the end face of the turntable 21.

[0079] The cover cap 33 cooperates with the rotating shaft 23 to fix the middle shaft portion 311 . Specifically, the cover cap 33 is threadedly connected to the middle shaft portion 311 .

[0080] During assembly, the latch 32, blade 312, and cap 33 are assembled horizontally downward on the horizontally placed shaft 23 in sequence. Then, the latch 32 is inserted from the first end into the pin hole 235 on the shaft 23, the blade through hole 313 passes through the shaft 23, the fixing groove 314 is engaged with the latch 32, and the cap 33 is screwed with the bearing thread to complete the fixing of the latch 32, blade 312, and cap 33.

[0081] In some embodiments, see Figure 14-15 The battery control circuit board assembly further includes an electromagnetic shielding cover 4, which is disposed on the battery control circuit board 1 and covers the permanent magnet 22 and the electromagnetic coil 11. The electromagnetic shielding cover 4 is provided to shield the influence of electromagnetic radiation on other electronic components on the battery control circuit board 1, thereby ensuring the normal function of the battery control circuit board 1.

[0082] In some embodiments, the inner diameter d of the electromagnetic shielding cover 4 is not less than the distribution range of the electromagnetic coil 11, so as to fully cover the electromagnetic coil 11 to form a Faraday cage effect and shield the influence of electromagnetic on other electronic components. The thickness b of the electromagnetic shielding cover 4 is in the range of 0.1mm~0.2mm. Specifically, the electromagnetic shielding cover 4 is provided with a protrusion 41, and the height a of the protrusion 41 is in the range of 0.1~0.3mm, which plays a limiting role and makes the rotating shaft 23 stand upright. The electromagnetic shielding cover 4 is provided with a shielding cover through hole 42, and the shielding cover through hole 42 is specifically provided on the protrusion 41, and the diameter i of the shielding cover through hole 42 is slightly larger than the outer diameter T of the second connecting part 233. The electromagnetic shielding cover 4 is provided with a plurality of evenly distributed through holes 44, and the diameter of the through hole 44 ranges from 0.4~1.0mm.

[0083] In some specific examples, the electromagnetic shielding cover 4 is provided with a connecting ear 43, and the battery control circuit board 1 is provided with a shielding cover pad 19 outside the distribution area of ​​the electromagnetic coil 11. The position of the shielding cover pad 19 is opposite to the connecting ear 43, and the connecting ear 43 is connected to the shielding cover pad 19, thereby fixing the electromagnetic shielding cover 4 to the battery control circuit board 1.

[0084] During assembly, the electromagnetic shielding cover 4 and the rotor 2 are horizontally installed downward on the horizontally placed battery control circuit board 1, the rotating shaft 23 of the rotor 2 is inserted into the circuit board through hole 15, the electromagnetic shielding cover 4 is assembled downward, the shielding cover through hole 42 passes through the rotating shaft 23, and the bottom end of the electromagnetic shielding cover 4 is fitted with the battery control circuit board 1. Then, the shielding cover pad 19 is positioned with the pad through hole on the connecting ear 43, and the molten tin passes through the pad through hole and is cooled and fixedly combined with the shielding cover pad 19. The assembled turntable 21 is connected between the battery control circuit board 1 and the electromagnetic shielding cover 4 through the rotating shaft 23.

[0085] Based on the battery control circuit board assembly provided in the above embodiment, please refer to Figure 16-Figure 18The present application also provides a battery, which includes a battery cell 20 and any one of the battery control circuit board components 10 in the above embodiments, wherein the battery control circuit board 1 of the battery control circuit board component 10 is electrically connected to the battery cell 20, wherein the battery cell 20 is responsible for storing electrical energy. Since the battery adopts the battery control circuit board component in the above embodiments, please refer to the above embodiments for the beneficial effects of the battery.

[0086] In a specific example, the length of the battery cell 20 ranges from 60 to 140 mm, the width ranges from 30 to 70 mm, and the thickness ranges from 2.5 to 8.0 mm. The battery cell 20 is provided with a tab 201 to connect with the control circuit board. The tab 201 specifically includes a positive tab of the battery cell and a negative tab of the battery cell. The width of the tab 201 ranges from 6 to 8 mm.

[0087] In some embodiments, see Fig.16 At least one battery cell 20 is disposed on each side of the battery control circuit board assembly, and the battery cells 20 on both sides are connected to the battery control circuit board 1, respectively, specifically through their respective pole ears 201 connected to the corresponding battery cell connection part 12, when connected, the pole ears 201 and the corresponding battery cell connection part 12 can be stacked and placed, and then the circuit connection is tightened by laser welding process, resistance welding process, and soldering. The battery control circuit board 1 is specifically parallel to the battery cell 20. The distance between the edge of the battery cell 20 and the battery control circuit board 1 is greater than zero to prevent interference and contact short circuit risks.

[0088] In some embodiments, at least two battery cells 20 are disposed on one side of the battery control circuit board assembly, and at least two battery cells 20 are stacked and respectively connected to the battery control circuit board 1. Furthermore, an elastic pad 40 is disposed between two adjacent battery cells 20, and the compression performance of the elastic pad 40 can be used to absorb the expansion space generated by the circulation of the battery cell 20. Specifically, double-sided tape is disposed on both sides of the elastic pad 40 to connect and fix the stacked battery cells 20. Exemplarily, the elastic pad 40 is foam.

[0089] In some embodiments, see Fig.17 and Fig.18The battery also includes a housing 30, which is arranged outside the battery control circuit board assembly. The housing 30 is provided with an air inlet 301 and an air outlet 302. The fan blade 3 is a suction fan blade, and the air inlet 301 is opposite to the suction fan blade, or the fan blade 3 is an exhaust fan blade, and the air outlet 302 is opposite to the exhaust fan blade. By setting the housing 30, the battery cell 20 and the battery control circuit board assembly can be supported and protected. At the same time, the housing 30 is provided with an air inlet 301 and an air outlet 302 to play a drainage role. Combined with the rotation of the fan blade 3, the air is circulated in a preset air path, and the high-heat generating components of the battery can be arranged at the corresponding air path position, further improving the heat dissipation efficiency of the battery. The number of the air inlet 301 and the air outlet 302 can be set as needed, and is not specifically limited here. Exemplarily, the housing 30 is a plastic housing, and specifically can be made of plastic materials such as polycarbonate (PC), polypropylene (PP), acrylonitrile-butadiene-styrene (ABS), etc.

[0090] In some embodiments, the housing 30 includes a first housing 303 and a second housing 304, the first housing 303 is connected to the second housing 304, and the first housing 303 is arranged on the back of the battery cell 20 and the battery control circuit board assembly, and the second housing 304 is arranged on the front of the battery control circuit board assembly. The housing 30 adopts a split structure, which is easy to assemble. The first housing 303 is arranged on the back of the battery cell 20 and the battery control circuit board assembly as a whole to play an overall protective role. It is understandable that the first housing 303 can be a frame structure, which is arranged on the back of the battery control circuit board assembly, the bottom edge and the outside of the battery cell 20, so that the battery cell 20 can dissipate heat better. The second housing 304 is arranged on the front of the battery control circuit board assembly, mainly to protect the battery control circuit board assembly, and cooperates with the first housing 303 as a frame to support the battery cell 20 and the battery control circuit board assembly as a whole. Specifically, the first housing 303 and the second housing 304 are snap-fitted, the connection is reliable, and the disassembly and assembly are convenient.

[0091] In some embodiments, an air inlet 301 or an air outlet 302 is provided on the housing 30 opposite to the device on the battery control circuit board 1. In one embodiment, the fan blade 3 is a suction fan blade, the air inlet 301 is opposite to the suction fan blade, and an air outlet 302 is provided on the housing 30 opposite to the device on the battery control circuit board 1. In another embodiment, the fan blade 3 is an exhaust fan blade, the air outlet 302 is opposite to the exhaust fan blade, and an air inlet 301 is provided on the housing 30 opposite to the device on the battery control circuit board 1. When the battery is working, the rotor 2 on the battery control circuit board 1 inside the battery pack rotates to drive the fan blade 3 to rotate, and the rotation of the fan blade 3 drives air circulation, and cold air enters from the air inlet 301, exchanges heat with the device and other components inside the battery to absorb the heat generated by them, and the air with increased temperature is discharged from the air outlet 302, which plays a role in reducing the internal temperature of the battery. By opening an air inlet 301 or an air outlet 302 on the housing 30 opposite to the device, the air flow rate near the heat generating device is increased, the heat energy is accelerated, and the heat dissipation efficiency is further improved. The size of the air inlet 301 or the air outlet 302 opposite to the device is specifically consistent with the size of the device. In some specific examples, the wall surface of the housing 30 opposite to the device is concave to enclose the air inlet 301 or the air outlet 302, and the height range is 0.5~2.0mm, specifically ensuring that a certain gap is left with the device.

[0092] For ease of explanation, the following embodiments all take the fan blade 3 as an exhaust fan blade, and the air outlet 302 is opposite to the exhaust fan blade as an example. In the case where the housing 30 includes a first housing 303 and a second housing 304, the air inlet 301 can be respectively provided on the two as needed. There is a gap between the battery control circuit board 1 and the first housing 303 or the second housing 304, or there is a gap between the battery control circuit board 1 and the first housing 303 and the second housing 304, respectively, so that the air on the front and back sides of the battery control circuit board 1 can circulate, further improving the heat dissipation efficiency. An air outlet 302 is provided at a position opposite to the electromagnetic shielding cover 4 on the second housing 304, and the diameter of the air outlet 302 is slightly larger than the outer diameter of the electromagnetic shielding cover 4. Specifically, the local wall surface of the second housing 304 is concave to enclose the air outlet 302, and the height of the air outlet 302 is greater than the height of the second connecting portion 233 to ensure that the blade 312 is located in the second housing 304, and the inner diameter of the air outlet 302 is greater than the outer diameter of the blade 312 to avoid interference.

[0093] During assembly, the connected battery cell 20 and the battery control circuit board assembly are placed horizontally in the first housing 303. The components on the back of the battery control circuit board 1 are opposite to the air inlet 301 on the first housing 303, and specifically the power field effect transistor 143, the metal-oxide semiconductor field effect transistor 144, the Zener diode 145, etc. are aligned with the air inlet 301 on the first housing 303. The second housing 304 is placed horizontally downward above the connected battery cell 20 and the battery control circuit board assembly, and is connected to the first housing 303. The components on the front of the battery control circuit board 1 are opposite to the air inlet 301 on the second housing 304, and specifically the integrated circuit 141, the battery management chip 142, etc. are aligned with the air inlet 301 on the second housing 304.

[0094] In some embodiments, see Figure 19-21 The battery further includes a label 50 disposed outside the housing 30. Ventilation holes 501 are disposed on the label 50 at positions opposite to the air inlet 301 and the air outlet 302 to ensure air circulation. The size of the ventilation holes 501 is consistent with the size of the corresponding air inlet 301 or air outlet 302. Exemplarily, an insulating protective label 50 with adhesive and silk screen printing is used for covering.

[0095] When the housing 30 includes the first housing 303 and the second housing 304, the label 50 includes a first label 502 disposed outside the first housing 303 and a second label 503 disposed outside the second housing 304 and the front of the battery cell 20. Exemplarily, the first label 502 is a polyethylene terephthalate film with no logo on one side and adhesive glue on the other side, which can achieve the purpose of insulation and structural bonding and fastening after coating. The second label 503 is a polyethylene terephthalate film with safety logos printed on one side and adhesive glue on the other side, which can achieve the purpose of insulation and structural bonding and fastening after coating.

[0096] Based on the battery and battery control circuit board assembly provided in the above embodiments, the present application also provides an electric device, which includes any one of the batteries or the battery control circuit board assembly in the above embodiments. Since the electric device uses the battery or the battery control circuit board assembly in the above embodiments, please refer to the above embodiments for the beneficial effects of the electric device.

[0097] It is understandable that the design of the electrical device can be energy storage application or power output, or the two application modes can be compatible, which should all fall within the scope of the description of this application, specifically including but not limited to mobile phones, tablet computers, laptops, etc.

[0098] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0099] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery control circuit board assembly, characterized in that: include: A battery control circuit board (1), wherein the battery control circuit board (1) is provided with a printed circuit, and the printed circuit forms an electromagnetic coil (11); A rotor (2) cooperates with the electromagnetic coil (11), the rotor (2) comprising a rotating disk (21) and a permanent magnet (22), the rotating disk (21) being rotatably disposed on the battery control circuit board (1), and the permanent magnet (22) being disposed on the rotating disk (21); The fan blades (3) are arranged on the rotating disk (21).

2. The battery control circuit board assembly according to claim 1, characterized in that: The battery control circuit board (1) is provided with a plurality of electromagnetic coils (11), each of the electromagnetic coils (11) being in the shape of a spiral with N turns, wherein N is a positive integer, and the plurality of electromagnetic coils (11) are distributed in a circular array with the rotating shaft (23) of the rotating disk (21) as the center.

3. The battery control circuit board assembly according to claim 2, characterized in that: The battery control circuit board (1) comprises a multi-layer substrate, each layer of the substrate is provided with the electromagnetic coil (11), and the electromagnetic coils (11) at corresponding positions on each layer of the substrate are connected.

4. The battery control circuit board assembly according to claim 2, characterized in that: The outer diameter of the rotating disk (21) is not greater than the outer diameter of the circular array distribution, wherein the outer diameter of the circular array distribution is the maximum distance from the electromagnetic coil (11) to the rotating shaft (23).

5. The battery control circuit board assembly according to any one of claims 1 to 4, characterized in that: The rotor (2) further comprises a rotating shaft (23); a circuit board through hole (15) is provided on the battery control circuit board (1); the rotating shaft (23) comprises an intermediate shaft portion (231), a first connecting portion (232) and a second connecting portion (233); the first connecting portion (232) and the second connecting portion (233) are arranged at opposite ends of the intermediate shaft portion (231); the first connecting portion (232) is rotatably arranged in the circuit board through hole (15); the second connecting portion (233) is connected to the fan blade (3); and the intermediate shaft portion (231) is connected to the rotating disk (21).

6. The battery control circuit board assembly according to claim 5, characterized in that: The outer diameter of the first connecting portion (232) is smaller than the outer diameter of the intermediate shaft portion (231); a step surface (234) is formed between the first connecting portion (232) and the intermediate shaft portion (231); the step surface (234) abuts against the battery control circuit board (1); and a gap is provided between the rotating disk (21) and the battery control circuit board (1).

7. The battery control circuit board assembly according to claim 6, characterized in that: The battery control circuit board (1) comprises a board body (16) and a gasket (17), the circuit board through hole (15) being arranged on the board body (16), the gasket (17) being arranged on the circuit board through hole (15), and the gasket (17) being provided with a gasket through hole (171), and the first connection portion (232) being arranged on the gasket through hole (171).

8. The battery control circuit board assembly according to claim 7, characterized in that: The gasket (17) has a flange (172) at one end facing the fan blade (3); the inner diameter of the intermediate shaft portion (231) is greater than the diameter of the gasket through hole (171); and the step surface (234) abuts against the flange (172).

9. The battery control circuit board assembly according to claim 5, characterized in that: The fan blade (3) comprises: A fan blade body (31) comprises a central axis portion (311) and a plurality of blades (312) arranged on the central axis portion (311); the central axis portion (311) is provided with a fan blade through hole (313) along the axial direction and a fixing groove (314) along the radial direction; the rotating shaft (23) is arranged in the fan blade through hole (313); and a pin hole (235) is provided on the rotating shaft (23) corresponding to the fixing groove (314); A latch pin (32) disposed in the pin hole (235) and the fixing groove (314); A cover cap (33) is arranged at one end of the blade (312) away from the battery control circuit board (1); the cover cap (33) is connected to the rotating shaft (23) and abuts against the blade (312).

10. The battery control circuit board assembly according to any one of claims 1 to 4, characterized in that: It also comprises an electromagnetic shielding cover (4), which is arranged on the battery control circuit board (1) and covers the outside of the permanent magnet (22) and the electromagnetic coil (11).

11. A battery, comprising a battery cell (20), characterized in that: It also comprises a battery control circuit board assembly according to any one of claims 1 to 10, wherein the battery control circuit board (1) is electrically connected to the battery cell (20).

12. The battery according to claim 11, characterized in that It also comprises a shell (30) arranged outside the battery control circuit board assembly, the shell (30) being provided with an air inlet (301) and an air outlet (302), the fan blade (3) being an air suction fan blade, the air inlet (301) being opposite to the air suction fan blade, or the fan blade (3) being an exhaust fan blade, the air outlet (302) being opposite to the exhaust fan blade.

13. The battery according to claim 12, characterized in that The housing (30) comprises a first housing (303) and a second housing (304), wherein the first housing (303) is connected to the second housing (304), and the first housing (303) is arranged on the back sides of the battery cell (20) and the battery control circuit board assembly, and the second housing (304) is arranged on the front side of the battery control circuit board assembly.

14. The battery according to claim 12, characterized in that The housing (30) is provided with the air inlet (301) or the air outlet (302) opposite to the device on the battery control circuit board (1).

15. An electrical device, characterized in that: It comprises the battery control circuit board assembly as described in any one of claims 1-10 or the battery as described in any one of claims 10-14.

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