A bidirectional DC-DC charging and discharging module

Abstract

The invention discloses a bidirectional DC-DC charging and discharging module, and relates to the technical field of DC-DC charging and discharging modules. The module comprises a module mounting substrate, on which a voltage stabilizing circuit module and a bidirectional DC-DC conversion element for intelligent voltage regulation are welded and fixed, a heat dissipation base is provided below the bottom of the module mounting substrate, a plurality of grooves are provided on the heat dissipation base, and the plurality of grooves are distributed in a linear array, a fixing groove connected to the bottom of the groove is further provided inside the heat dissipation base, a heat conducting sheet is embedded in the fixing groove, the bottom of the module mounting substrate is on the heat dissipation base and contacts the top of the heat conducting sheet, and a flow guide component is provided inside the groove; the invention drives a contact cooling structure to produce a flow effect through a designed flow guide component, so that a coolant contacts the module mounting substrate, thereby absorbing the heat generated by electronic components on the module mounting substrate, achieving a uniform heat dissipation effect, and having a good heat dissipation effect and being stable without vibration.

Description

Technical Field

[0001] The invention relates to the technical field of DC-DC charging and discharging modules, in particular to a bidirectional DC-DC charging and discharging module. Background Art

[0002] The DC-DC charging and discharging module is a power supply that can be directly mounted on a printed circuit board. Its feature is that it can provide power for application-specific integrated circuits, digital signal processors, microprocessors, memories, field programmable gate arrays, and other digital or analog loads. Generally speaking, this type of module is called a point-of-load, power supply system or point-of-use power supply system.

[0003] At present, the existing DC-DC charging and discharging modules do not have the function of voltage stabilization. When the input power supply voltage is too large, it is easy to cause damage to related components. In serious cases, they will be directly scrapped. Repair and replacement require costs and are troublesome. For example, the publication number CN212277955U discloses an intelligent bidirectional DC-DC charging and discharging module, including a circuit board and a charging and discharging port arranged on the upper surface of the circuit board, a sampling element, an 8051 single-chip microcontroller, an ultra-wide power supply voltage switching power supply, a bidirectional DC-DC conversion element and a lithium battery connection port. The charging and discharging port and the lithium battery connection port are respectively connected in series with the bidirectional DC-DC conversion element, and the sampling element, the 8051 single-chip microcontroller, and the ultra-wide power supply voltage switching power supply are connected in series in sequence to form an intelligent voltage stabilization circuit. The intelligent voltage stabilization circuit is connected in parallel between the charging and discharging port and the bidirectional DC-DC conversion element, wherein the sampling element is electrically connected to the charging and discharging port, and the ultra-wide power supply voltage switch is connected in series with the bidirectional DC-DC conversion element. The power supply is electrically connected to the bidirectional DC-DC conversion element, thereby realizing intelligent voltage regulation, ensuring safety, and preventing damage to components due to excessive voltage, thus avoiding maintenance and replacement and reducing costs; the above patent is to install bidirectional DC-DC conversion elements and intelligent voltage stabilization circuits on the existing DC-DC charging and discharging module to realize intelligent voltage regulation, so the heat generation of the DC-DC charging and discharging module will increase. The current charging and discharging module adopts air cooling most, but due to the large size of the cooling fan, not only does this cooling method occupy a large space, but the cooling fan will also vibrate when working. The charging and discharging ports, sampling elements, 8051 single-chip microcontrollers, ultra-wide supply voltage switching power supplies, bidirectional DC-DC conversion elements and lithium battery connection ports on the upper surface of the charging and discharging module are all small electronic components, and vibration will also affect the stability of the charging and discharging module, and these electronic components are also susceptible to vibration. To this end, we propose a bidirectional DC-DC charging and discharging module. Summary of the invention

[0004] The object of the present invention is to provide a bidirectional DC-DC charging and discharging module to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bidirectional DC-DC charging and discharging module, comprising a module mounting substrate, on which a voltage stabilizing circuit module and a bidirectional DC-DC conversion element for intelligent voltage regulation are welded and fixed, a heat dissipation base is provided below the bottom of the module mounting substrate, a plurality of grooves are provided on the heat dissipation base, and the plurality of grooves are distributed in a linear array, a fixing groove connected to the bottom of the groove is also provided inside the heat dissipation base, a heat conducting sheet is embedded in the fixing groove, the bottom of the module mounting substrate is on the heat dissipation base and contacts the top of the heat conducting sheet, a flow guide component is provided inside the groove, a contact cooling structure is provided above the flow guide component, a temperature measuring element is fixed to the outer side of one end of the heat conducting sheet inside the groove, and mounting mechanisms are fixed at both ends of the heat dissipation base.

[0006] Preferably, the contact cooling structure includes a heat-conductive diaphragm, both ends of which are fixed to the inner wall of the groove, and the interior of the heat-conductive diaphragm is filled with a colloidal liquid, and the colloidal liquid is a mixture of magnetic solid particles, a base carrier liquid and a surfactant, and the base carrier liquid is a coolant composed of an organic solvent. This structure can produce a flow effect under the drive of the guide component, so that the coolant in the colloidal liquid contacts the module mounting substrate, thereby absorbing the heat generated by the electronic components on the module mounting substrate, thereby achieving the effect of uniform heat dissipation.

[0007] Preferably, the guide assembly includes a support plate, both ends of which are fixed to the inner wall of the groove, a guide plate is fixed on the top of the support plate, a guide groove is provided on the guide plate, a magnetic ball is rollingly connected in the guide groove, a first magnetic part is fixed to one end of the guide plate, and a second magnetic part is fixed to the other end, so that the colloidal liquid can be made to flow through the guide assembly.

[0008] Preferably, the first magnetic component includes a first electromagnet, which is fixedly inserted into one end of the guide plate, and a first spring is provided on the outer side of the end of the first electromagnet. One end of the first spring is fixed to the inner wall of the guide groove, and the other end of the first spring is fixed to a first pressure switch, so that a magnetic force in a single direction can be generated through the first magnetic component.

[0009] Preferably, the second magnetic part includes a second electromagnet, which is fixedly inserted into the other end of the guide plate, and the first electromagnet and the second electromagnet are symmetrically distributed at the two ends of the guide plate. A second spring is provided on the outside of the end of the second electromagnet, one end of the second spring is fixed to the inner wall of the guide groove, and the other end of the second spring is fixed to a second pressure switch, so that a magnetic force in a single direction can be generated through the second magnetic part.

[0010] Preferably, the temperature measuring element is a surface-mount temperature sensor, and the temperature measuring element is electrically connected to the single-chip microcontroller in the voltage stabilizing circuit module. The temperature measuring element is used to monitor the temperature on the heat conducting plate in real time, thereby controlling the automatic operation of the flow guide component.

[0011] Preferably, the mounting mechanism comprises two pressing plates, the pressing plates are in contact with the corners of the module mounting substrate, a limiting column is fixed at one end of the bottom of the pressing plate, a through hole for the limiting column to pass through is provided at the corner of the module mounting substrate, a limiting groove is provided at the position corresponding to the through hole on the heat dissipation base, the limiting column is adapted to the limiting groove, a connecting plate is fixed between the two pressing plates, a threaded rod is fixed at the bottom center of the connecting plate, a threaded tube is threadedly connected to the outer side of the threaded rod, the threaded tube is rotatably connected to the heat dissipation base, a transmission part is provided at the bottom of the heat dissipation base, and the mounting mechanism is used to facilitate the rapid connection between the module mounting substrate and the heat dissipation base.

[0012] Preferably, the transmission member includes a pulley, which is fixedly sleeved on the bottom outer side of the threaded tube. Two pulleys are provided, and a synchronous belt is connected between the two pulleys for transmission, so that the synchronous rotation of the two groups of threaded tubes can be easily achieved through the transmission member.

[0013] Preferably, the outer side of the top of the threaded tube is evenly provided with anti-skid patterns, which facilitate manual rotation of the threaded tube.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention optimizes the heat dissipation method of the existing charging and discharging module. The designed flow guide component drives the contact cooling structure to produce a flow effect, so that the coolant contacts the module mounting substrate, thereby absorbing the heat generated by the electronic components on the module mounting substrate, achieving a uniform heat dissipation effect, good heat dissipation effect, and stable without vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a cross-sectional view of the present invention under the front reference plane;

[0018] Figure 3 It is a cross-sectional view of the present invention below the right-view reference plane;

[0019] Figure 4 It is a schematic diagram of the structure of the installation mechanism of the present invention;

[0020] Figure 5 This is a schematic diagram of the heat dissipation base structure of the present invention;

[0021] Figure 6 It is a schematic diagram of the transmission structure of the present invention;

[0022] Figure 7 for Figure 3 A magnified image of the middle A area;

[0023] Figure 8 for Figure 3 Enlarged view of area B;

[0024] Fig. 9 for Figure 4 Enlarged view of area C.

[0025] In the figure: 1-module mounting substrate; 2-voltage stabilizing circuit module; 3-bidirectional DC-DC conversion element; 4-heat dissipation base; 5-groove; 6-fixing groove; 7-heat conducting sheet; 8-flow guide assembly; 9-contact cooling structure; 10-temperature measuring element; 11-installation mechanism; 12-heat conducting diaphragm; 13-colloidal liquid; 14-support plate; 15-guide plate; 16-guide groove; 17-first magnetic member; 18-second magnetic member; 19-first electromagnet; 20-first spring; 21-first pressure switch; 22-second electromagnet; 23-second spring; 24-second pressure switch; 25-pressing plate; 26-limiting column; 27-limiting groove; 28-connecting plate; 29-threaded rod; 30-threaded pipe; 31-transmission member; 32-pulley; 33-synchronous belt; 34-anti-slip pattern; 35-magnetic ball. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1: Figure 1 , Figure 2 and Figure 5As shown, a bidirectional DC-DC charging and discharging module comprises a module mounting substrate 1, on which a voltage stabilizing circuit module 2 for intelligent voltage regulation and a bidirectional DC-DC conversion element 3 are welded and fixed, wherein a sampling element, an 8051 single-chip microcontroller, and an ultra-wide supply voltage switching power supply are sequentially connected in series to form a voltage stabilizing circuit module 2, and the voltage stabilizing circuit module 2 is connected in parallel between a charging and discharging port and the bidirectional DC-DC conversion element 3; a heat dissipation base 4 is provided below the bottom of the module mounting substrate 1, and the heat dissipation base 4 facilitates the installation of the heat dissipation structure, and a plurality of grooves 5 are provided on the heat dissipation base 4, and the plurality of grooves 5 are distributed in a linear array, and a fixing groove 6 connected to the bottom of the groove 5 is further provided inside the heat dissipation base 4, and a heat conducting sheet 7 is embedded in the fixing groove 6, and the bottom of the module mounting substrate 1 is on the heat dissipation base 4 and connected to the heat conducting sheet 7. The top of the sheet 7 is in contact with each other, and the heat transferred to the module mounting substrate 1 can be further transferred through the heat conductive sheet 7. A guide component 8 is provided inside the groove 5, and a contact cooling structure 9 is provided above the guide component 8. The designed guide component 8 drives the contact cooling structure 9 to produce a flow effect, so that the coolant contacts the module mounting substrate 1, thereby absorbing the heat generated by the electronic components on the module mounting substrate 1, achieving the effect of uniform heat dissipation, good heat dissipation effect, and stable without vibration; a temperature measuring element 10 is fixed on the outside of one end of the heat conductive sheet 7 inside the groove 5, and the temperature on the heat conductive sheet 7 can be measured by the temperature measuring element 10, so as to intelligently start the guide component 8 to work, and mounting mechanisms 11 are fixed at both ends of the heat dissipation base 4, and the mounting mechanism 11 is convenient for quickly disassembling the module mounting substrate 1 and the heat dissipation base 4.

[0028] Among them, Figure 2 and Figure 3 As shown, in order to achieve the cooling effect, the contact cooling structure 9 includes a heat-conducting diaphragm 12, both ends of the heat-conducting diaphragm 12 are fixed to the inner wall of the groove 5, and the inside of the heat-conducting diaphragm 12 is filled with a colloidal liquid 13, and the colloidal liquid 13 is a mixture of magnetic solid particles, a base carrier liquid and a surfactant, and the base carrier liquid is a coolant composed of an organic solvent. The magnetic solid particles in the colloidal liquid 13 have no magnetic attraction when static, and only show magnetism when an external magnetic field acts. Therefore, the movement of the magnetic field drives the magnetic solid particles to squeeze the internal base carrier liquid, producing the effect of fluid movement, so that the coolant in the colloidal liquid 13 contacts the module mounting substrate 1, thereby absorbing the heat generated by the electronic components on the module mounting substrate 1, and achieving the effect of uniform heat dissipation.

[0029] At the same time, if Figure 3As shown, in order to facilitate the flow of the colloidal liquid 13, the guide assembly 8 includes a support plate 14, both ends of the support plate 14 are fixed to the inner wall of the groove 5, a guide plate 15 is fixed to the top of the support plate 14, a guide groove 16 is provided on the guide plate 15, a magnetic ball 35 is connected in a rolling manner in the guide groove 16, a first magnetic member 17 is fixed to one end of the guide plate 15, and a second magnetic member 18 is fixed to the other end thereof. When an external magnetic field is applied, the magnetic ball 35 will tend to roll in the guide groove 16, and there is also a magnetic repulsion effect between the magnetic ball 35 and the colloidal liquid 13, so that when the magnetic ball 35 rolls, the colloidal liquid 13 flows with it, squeezing the heat-conductive diaphragm 12 on the outside of the carrier liquid into contact with the module mounting substrate 1, thereby indirectly cooling the module mounting substrate 1.

[0030] In addition, if Figure 7 and Figure 8 As shown, in order to facilitate the generation of magnetism, the first magnetic member 17 includes a first electromagnet 19, which is fixedly inserted at one end of the guide plate 15, and a first spring 20 is provided on the outer side of the end of the first electromagnet 19, one end of the first spring 20 is fixed to the inner wall of the guide groove 16, and the other end of the first spring 20 is fixed with a first pressure switch 21; the second magnetic member 18 includes a second electromagnet 22, which is fixedly inserted at the other end of the guide plate 15, the first electromagnet 19 and the second electromagnet 22 are symmetrically distributed at the two ends of the guide plate 15, and a second spring 23 is provided on the outer side of the end of the second electromagnet 22, one end of the second spring 23 is fixed to the inner wall of the guide groove 16, and the other end of the second spring 23 is fixed with a second pressure switch 24, and the magnetic ball 35 can be driven to reciprocate back and forth by intermittently energizing the first magnetic member 17 and the second magnetic member 18.

[0031] At the same time, if Figure 2 As shown, in order to facilitate the automatic control of the flow guide component 8, the temperature measuring element 10 is a surface mount temperature sensor, and the temperature measuring element 10 is electrically connected to the single-chip microcontroller in the voltage stabilizing circuit module 2. The temperature measuring element 10 is used to monitor the temperature on the heat conducting plate 7 in real time.

[0032] Working principle: First, the first magnetic part 17 and the second magnetic part 18 are not energized, and the heat conducting sheet 7 transfers the heat of the module mounting substrate 1 to the temperature measuring element 10. The heat conducting sheet 7 is made of aluminum and has a certain heat dissipation effect. As the working time of the module increases, the temperature detected by the temperature measuring element 10 also increases. When the temperature detected by the temperature measuring element 10 exceeds the temperature set by the single-chip microcontroller, the single-chip microcontroller will energize the first electromagnet 19, and the first electromagnet 19 will drive the magnetic ball 35 to roll in the guide groove 16 in the direction close to the second electromagnet 22. When rolling to contact with the second pressure switch 24, the second electromagnet 22 is automatically energized, and the first electromagnet 19 is not energized, and the magnetic ball 35 will be pushed again to move in the direction close to the first electromagnet 19 until the magnetic ball 35 When the first pressure switch 21 is contacted again, the first electromagnet 19 is energized again, and the second electromagnet 22 is de-energized, the magnetic ball 35 is driven to move close to the second electromagnet 22. This repetition can realize the reciprocating motion of the magnetic ball 35. The magnetic ball 35 rolls in the guide groove 16, and there is also a magnetic repulsion effect between the magnetic ball 35 and the colloidal liquid 13. As a result, when the magnetic ball 35 rolls, the colloidal liquid 13 flows with it, and the heat-conductive diaphragm 12 on the outside of the extruded carrier liquid contacts the module mounting substrate 1, which indirectly cools the module mounting substrate 1, thereby absorbing the heat generated by the electronic components on the module mounting substrate 1, achieving the effect of uniform heat dissipation, until the temperature measured by the temperature measuring element 10 is lower than the temperature set by the single-chip microcontroller, and the single-chip microcontroller controls the two electromagnets to not work.

[0033] Example 2: Figure 4 As shown, the mounting mechanism 11 includes two pressing plates 25, which are in contact with the corners of the module mounting substrate 1. A limiting column 26 is fixed at one end of the bottom of the pressing plate 25. A through hole for the limiting column 26 to pass through is provided at the corner of the module mounting substrate 1. A limiting groove 27 is provided at the position corresponding to the through hole on the heat dissipation base 4, and the limiting column 26 is adapted to the limiting groove 27. A connecting plate 28 is fixed between the two pressing plates 25, and a threaded rod 29 is fixed at the bottom center of the connecting plate 28. The outer side of the threaded rod 29 is threadedly connected to a threaded tube 30, and the threaded tube 30 is rotatably connected to the heat dissipation base 4. A transmission member 31 is provided at the bottom of the heat dissipation base 4. The mounting mechanism 11 facilitates the rapid connection between the module mounting substrate 1 and the heat dissipation base 4.

[0034] Among them, Figure 6 As shown, in order to facilitate the synchronous rotation of the two groups of threaded tubes 30, the transmission member 31 includes a pulley 32, which is fixedly sleeved on the bottom outer side of the threaded tube 30. There are two pulleys 32, and a synchronous belt 33 is connected between the two pulleys 32.

[0035] In addition, if Fig. 9As shown, in order to facilitate manual rotation of the threaded tube 30 , anti-slip grooves 34 are evenly provided on the outer side of the top of the threaded tube 30 .

[0036] In this embodiment: when installing the module mounting substrate 1 and the heat dissipation base 4, first place the module mounting substrate 1 on the heat dissipation base 4 so that the through hole and the limiting groove 27 are aligned, then manually turn the threaded tube 30 to rotate, the threaded tube 30 drives the pulley 32 to rotate, and the pulley 32 drives another threaded tube 30 to rotate together through the synchronous belt 33, so that the two threaded rods 29 move downward, thereby driving the pressure plates 25 at both ends of the connecting plate 28 to move, so that the limiting column 26 at the bottom of the pressure plate 25 passes through the through hole and is inserted into the limiting groove 27, thereby realizing the rapid installation of the module mounting substrate 1 and the heat dissipation base 4.

[0037] The operating circuit in this scheme is an existing conventional circuit, and the circuits and controls involved in this scheme are all existing technologies, which will not be described in detail here.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bidirectional DC-DC charging and discharging module, comprising a module mounting substrate (1), on which a voltage stabilizing circuit module (2) for intelligent voltage regulation and a bidirectional DC-DC conversion element (3) are welded and fixed, characterized in that: A heat dissipation base (4) is provided below the bottom of the module mounting substrate (1), a plurality of grooves (5) are provided on the heat dissipation base (4), and the plurality of grooves (5) are distributed in a linear array. A fixing groove (6) connected to the bottom of the groove (5) is also provided inside the heat dissipation base (4), and a heat conducting sheet (7) is embedded in the fixing groove (6). The bottom of the module mounting substrate (1) is on the heat dissipation base (4) and contacts the top of the heat conducting sheet (7). A flow guide component (8) is provided inside the groove (5), and a contact cooling structure (9) is provided above the flow guide component (8). A temperature measuring element (10) is fixed to the outside of one end of the heat conducting sheet (7) inside the groove (5), and mounting mechanisms (11) are fixed at both ends of the heat dissipation base (4); The contact cooling structure (9) comprises a heat-conducting diaphragm (12), the two ends of which are fixed to the inner wall of the groove (5), and the interior of the heat-conducting diaphragm (12) is filled with a colloidal liquid (13), wherein the colloidal liquid (13) is a mixture of magnetic solid particles, a base carrier liquid and a surfactant, and the base carrier liquid is a cooling liquid composed of an organic solvent; The guide assembly (8) comprises a support plate (14), the two ends of the support plate (14) being fixed to the inner wall of the groove (5), a guide plate (15) being fixed to the top of the support plate (14), a guide groove (16) being provided on the guide plate (15), a magnetic ball (35) being rollingly connected in the guide groove (16), a first magnetic member (17) being fixed to one end of the guide plate (15), and a second magnetic member (18) being fixed to the other end thereof.

2. A bidirectional DC-DC charging and discharging module according to claim 1, characterized in that: The first magnetic member (17) comprises a first electromagnet (19), the first electromagnet (19) being fixedly plugged into one end of the guide plate (15), a first spring (20) being provided on the outer side of the end of the first electromagnet (19), one end of the first spring (20) being fixed to the inner wall of the guide groove (16), and a first pressure switch (21) being fixed to the other end of the first spring (20).

3. A bidirectional DC-DC charging and discharging module according to claim 2, characterized in that: The second magnetic member (18) comprises a second electromagnet (22), the second electromagnet (22) being fixedly plugged into the other end of the guide plate (15), the first electromagnet (19) and the second electromagnet (22) being symmetrically distributed at the two ends of the guide plate (15), a second spring (23) being provided on the outer side of the end of the second electromagnet (22), one end of the second spring (23) being fixed to the inner wall of the guide groove (16), and the other end of the second spring (23) being fixed to a second pressure switch (24).

4. A bidirectional DC-DC charging and discharging module according to claim 1, characterized in that: The temperature measuring element (10) is a surface-mount temperature sensor, and the temperature measuring element (10) is electrically connected to a single-chip microcontroller in the voltage stabilizing circuit module (2).

5. A bidirectional DC-DC charging and discharging module according to claim 1, characterized in that: The mounting mechanism (11) comprises two pressing plates (25), the pressing plates (25) being in contact with the corners of the module mounting substrate (1), a limiting column (26) being fixed at one end of the bottom of the pressing plate (25), a through hole for the limiting column (26) to pass through being provided at the corners of the module mounting substrate (1), a limiting groove (27) being provided at a position corresponding to the through hole on the heat dissipation base (4), the limiting column (26) being matched with the limiting groove (27), a connecting plate (28) being fixed between the two pressing plates (25), a threaded rod (29) being fixed at the bottom center of the connecting plate (28), a threaded tube (30) being threadedly connected to the outer side of the threaded rod (29), the threaded tube (30) being rotatably connected to the heat dissipation base (4), and a transmission member (31) being provided at the bottom of the heat dissipation base (4).

6. A bidirectional DC-DC charging and discharging module according to claim 5, characterized in that: The transmission member (31) comprises a pulley (32), the pulley (32) being fixedly sleeved on the outside of the bottom of the threaded tube (30), two pulleys (32) being provided, and a synchronous belt (33) being transmission-connected between the two pulleys (32).

7. A bidirectional DC-DC charging and discharging module according to claim 6, characterized in that: The outer side of the top of the threaded tube (30) is evenly provided with anti-slip grooves (34).

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