Mppt controller, energy storage box structure and photovoltaic energy storage equipment

Abstract

This disclosure provides an MPPT controller, an energy storage box structure, and a photovoltaic energy storage device. The MPPT controller includes a charging central control component and a metal heat-conducting shell. The outer surface of the metal heat-conducting shell has a heat conduction part. An injection cavity is formed inside the metal heat-conducting shell, and the charging central control component is installed in the injection cavity. After at least a portion of the power amplifier component of the charging central control component is filled with heat-conducting adhesive between itself and the inner wall of the injection cavity, the heat-conducting adhesive will solidify and maintain close contact with the power amplifier component and the inner wall of the injection cavity, respectively. In this way, the main heat generated when the charging central control component is working can be stably transferred to the metal heat-conducting shell through the heat-conducting adhesive, and then conduct heat to the inner surface of the energy storage heat-conducting box through the heat conduction part. This allows more heat to be conducted to the outside of the photovoltaic energy storage device through the heat conduction part and the energy storage heat-conducting box, thereby reducing the accumulation of heat inside the photovoltaic energy storage device.

Description

Technical Field

[0001] This disclosure relates to the technical field of photovoltaic energy storage, and in particular to an MPPT controller, an energy storage box structure, and a photovoltaic energy storage device. Background Technology

[0002] To improve the energy conversion efficiency of solar power generation systems, most manufacturers typically integrate MPPT (Maximum Power Point Tracking) controllers into photovoltaic energy storage devices, enabling the solar panels to consistently output maximum power under complex environmental conditions. This results in the MPPT controller operating at power levels typically exceeding 200W, making it prone to thermal runaway. Given these factors, some manufacturers employ MPPT controllers, such as those disclosed in Chinese patent document CN219628192U, to dissipate heat through enhanced cooling structures. However, due to the airtightness requirements of photovoltaic energy storage devices, heat dissipated from the MPPT controller still accumulates inside the device, ultimately affecting the energy storage stability of the battery module. Utility Model Content

[0003] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide an MPPT controller, energy storage box structure, and photovoltaic energy storage device with faster heat dissipation and better operational stability.

[0004] The purpose of this disclosure is achieved through the following technical solution:

[0005] An MPPT controller, comprising:

[0006] A charging control component is used to electrically connect to a solar panel and a battery module respectively, so that the battery module can be powered by the solar panel;

[0007] The MPPT controller also includes a metal thermally conductive housing;

[0008] The outer surface of the metal heat-conducting shell has a heat-exiting portion, which is used to conduct heat to the inner surface of the energy storage heat-conducting box; a glue-filling cavity is formed inside the metal heat-conducting shell, and the charging control component is installed in the glue-filling cavity; at least a portion of the power amplifier component of the charging control component is provided with a cured thermal conductive adhesive between itself and the inner wall of the glue-filling cavity, so that the charging control component maintains heat transfer with the metal heat-conducting shell through the thermal conductive adhesive.

[0009] In some embodiments, a filling gap is formed between the charging control component and the inner wall of the injection cavity, the filling gap being used to fill the heat-conducting adhesive.

[0010] In some embodiments, the metal thermally conductive housing has a heat dissipation opening that communicates with the injection cavity; the heat dissipation opening is directed toward the flow path of the air blown out by the cooling fan.

[0011] In some embodiments, the heat-exiting part is provided with a flexible heat transfer sheet, the two sides of which are respectively attached to the outer surface of the metal heat-conducting shell and the inner surface of the energy storage heat-conducting box.

[0012] In some embodiments, the flexible heat transfer sheet is a thermally conductive silicone sheet or a thermally conductive silicone pad.

[0013] In some embodiments, the thermally conductive adhesive is a potting compound or a thermally conductive adhesive; and / or,

[0014] The metal heat-conducting housing is an aluminum housing or a copper housing; and / or,

[0015] The power amplifier component of the charging control assembly is located close to the heat dissipation part.

[0016] An energy storage box structure includes an energy storage heat conduction box and an MPPT controller according to any of the above embodiments; the MPPT controller is installed inside the energy storage heat conduction box, and the heat conduction part makes thermal contact with the inner surface of the energy storage heat conduction box.

[0017] In some embodiments, the energy storage heat conduction box includes a main box and a heat conduction cover that are interlocked; the MPPT controller is located inside the main box and is attached to the inner wall of the main box; the heat conduction part makes thermal contact with the inner surface of the heat conduction cover.

[0018] In some embodiments, the energy storage enclosure structure further includes a cooling fan and a temperature sensor that are electrically connected to each other. The cooling fan and the temperature sensor are both installed inside the energy storage heat conduction enclosure. The air outlet of the cooling fan faces the MPPT controller, and the temperature sensor is used to detect the temperature of the MPPT controller.

[0019] A photovoltaic energy storage device includes a battery module and a photovoltaic energy storage device according to any of the above embodiments; the battery module is installed in the energy storage heat conduction box, and the charging control component is electrically connected to the battery module.

[0020] Compared with the prior art, this disclosure has at least the following advantages:

[0021] In the aforementioned MPPT controller, since the charging control component is installed inside the glue injection cavity of the metal heat-conducting housing, after at least part of the power amplifier component of the charging control component is filled with thermally conductive adhesive between it and the inner wall of the glue injection cavity, the thermally conductive adhesive will solidify and maintain close contact with the power amplifier component and the inner wall of the glue injection cavity, respectively. In this way, the main heat generated when the charging control component is working can be stably transferred to the metal heat-conducting housing through the thermally conductive adhesive, and then conduct heat to the inner surface of the energy storage heat-conducting box through the heat outlet. This allows more heat to be conducted to the outside of the photovoltaic energy storage device through the heat outlet and the energy storage heat-conducting box, thereby reducing the accumulation of heat inside the photovoltaic energy storage device and ultimately improving the energy storage stability of the battery module. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional view of a photovoltaic energy storage device according to an embodiment of the present disclosure;

[0024] Figure 2 for Figure 1 The enlarged view shown at point A in the middle;

[0025] Figure 3 for Figure 1 The diagram shows an exploded view of a photovoltaic energy storage device.

[0026] Figure label:

[0027] 100. MPPT controller;

[0028] 110. Charging central control assembly; 1110. Power amplifier component;

[0029] 120. Metal heat-conducting housing; 1201. Filler gap; 1202. Heat dissipation opening; 1210. Heat conduction section; 1220. Flexible heat transfer fin;

[0030] 200. Energy storage and heat conduction box; 210. Main box; 220. Heat conduction cover; 230. Sealing gasket;

[0031] 300. Cooling fan; 310. Protective mesh;

[0032] 400. Battery module. Detailed Implementation

[0033] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0037] Please see Figure 1 and Figure 2 An embodiment of the MPPT controller 100 includes a charging control assembly 110 and a metal heat-conducting housing 120. The charging control assembly 110 is electrically connected to a solar panel (not shown) and a battery module 400, respectively, so that the battery module 400 receives power from the solar panel. Specifically, the power input section of the charging control assembly 110 is electrically connected to the power output terminal of the solar panel, and the power output section of the charging control assembly 110 is electrically connected to the charging section of the battery module 400. The metal heat-conducting housing 120... The outer surface of 20 has a heat-conducting part 1210, which is used to conduct heat to contact the inner surface of the energy storage heat-conducting box 200; a glue injection cavity is formed in the metal heat-conducting shell 120, and the charging control assembly 110 is installed in the glue injection cavity; at least a portion of the power amplifier component 1110 of the charging control assembly 110 is provided with a cured heat-conducting adhesive (not shown) between it and the inner wall of the glue injection cavity, so that the charging control assembly 110 maintains heat transfer with the metal heat-conducting shell 120 through the heat-conducting adhesive.

[0038] It is understandable that since the charging control component 110 is installed in the injection cavity of the metal heat-conducting housing 120, after at least a part of the power amplifier component 1110 of the charging control component 110 is filled with heat-conducting adhesive between itself and the inner wall of the injection cavity, the heat-conducting adhesive will solidify and maintain close contact with the power amplifier component 1110 and the inner wall of the injection cavity respectively. In this way, the main heat generated when the charging control component 110 is working can be stably transferred to the metal heat-conducting housing 120 through the heat-conducting adhesive, and then conduct heat to the inner surface of the energy storage heat-conducting box 200 through the heat outlet 1210. That is, the metal heat-conducting housing 120 is located inside the energy storage heat-conducting box 200, so that more heat can be conducted to the outside of the photovoltaic energy storage device through the heat outlet 1210 and the energy storage heat-conducting box 200, thereby reducing the accumulation of heat inside the photovoltaic energy storage device and ultimately improving the energy storage stability of the battery module 400.

[0039] In some embodiments, the power amplifier component 1110 of the charging control assembly 110 is disposed close to the heat dissipation portion 1210. It is understood that by disposing the power amplifier component 1110 of the charging control assembly 110 close to the heat dissipation portion 1210, the distance between the power amplifier component 1110 and the heat dissipation portion 1210 can be shortened, thereby allowing the heat from the power amplifier component 1110 to be transferred to the heat dissipation portion 1210 more quickly through the thermally conductive adhesive, further improving the heat dissipation efficiency of the charging control assembly 110.

[0040] In another embodiment, the power amplifier component of the charging control assembly 110 includes an inverter, for example, a bidirectional inverter, to convert the DC power on the solar panel into AC power to provide AC power for use by AC devices inside and outside the energy storage heat conduction box 200, and to rectify the AC power into DC power to charge the battery module 400.

[0041] Please see Figure 2 In some embodiments, a filling gap 1201 is formed between the charging control component 110 and the inner wall of the injection cavity, and the filling gap 1201 is used to fill the thermally conductive adhesive. It is understood that by filling the filling gap 1201 with the thermally conductive adhesive, the thermally conductive adhesive can cover the entire charging control component 110, while maintaining contact with the inner wall of the injection cavity. This allows the thermally conductive adhesive to lock in the heat of the charging control component 110 and conduct it to the metal heat-conducting housing 120. The metal heat-conducting housing 120 can then conduct the heat to the energy storage heat-conducting box 200 through the heat conduction part 1210, so as to diffuse it to the external environment. In this way, more heat can be conducted to the outside of the energy storage heat-conducting box 200 through the thermally conductive adhesive, reducing the accumulation of heat from the charging control component 110 within the energy storage heat-conducting box 200.

[0042] Please see Figure 1 and Figure 3In some embodiments, the metal heat-conducting housing 120 has a heat dissipation opening 1202, which is connected to the injection cavity; the heat dissipation opening 1202 is oriented toward the flow path of the air blown out by the cooling fan 300. It can be understood that, since the heat dissipation opening 1202 is connected to the injection cavity, by oriented the heat dissipation opening 1202 toward the flow path of the air blown out by the cooling fan 300, the metal heat-conducting housing 120 can be cooled by the air blown out by the cooling fan 300.

[0043] Please see Figure 2 In some embodiments, the heat-exiting part 1210 is provided with a flexible heat transfer sheet 1220. The two sides of the flexible heat transfer sheet 1220 are respectively attached to the outer surface of the metal heat-conducting shell 120 and the inner surface of the energy storage heat-conducting box 200. It can be understood that because the two sides of the flexible heat transfer sheet 1220 are respectively attached to the outer surface of the metal heat-conducting shell 120 and the inner surface of the energy storage heat-conducting box 200, heat on the metal heat-conducting shell 120 can be conducted to the energy storage heat-conducting box 200 more quickly through the flexible heat transfer sheet 1220. Furthermore, the flexible heat transfer sheet 1220 can deform between the metal heat-conducting shell 120 and the energy storage heat-conducting box 200 to more densely fill the gap between them. The flexible heat transfer sheet 1220 is not limited to flexible and deformable heat-conducting sheets such as thermally conductive silicone sheets or thermally conductive polysiloxane sheets.

[0044] In some embodiments, the thermally conductive adhesive is not limited to potting compounds, thermally conductive adhesives, or other adhesives with good thermal conductivity and curing ability. Thus, the thermally conductive adhesive can cure and maintain close contact with the power amplifier component 1110 and the inner wall of the injection cavity, allowing the main heat generated during the operation of the charging control component 110 to be stably transferred to the metal thermally conductive housing 120 through the thermally conductive adhesive. The metal thermally conductive housing 120 is not limited to rigid metal housings with good thermal conductivity, such as aluminum or copper housings.

[0045] Please see Figure 2 and Figure 3 This disclosure also provides an energy storage enclosure structure, including an energy storage heat conduction enclosure 200 and an MPPT controller 100 of any of the above embodiments; the MPPT controller 100 is installed inside the energy storage heat conduction enclosure 200, and the heat conduction part 1210 makes thermal contact with the inner surface of the energy storage heat conduction enclosure 200. It can be understood that by applying the MPPT controller 100 of this disclosure to the energy storage enclosure structure, and through the heat conduction part 1210 making thermal contact with the inner surface of the energy storage heat conduction enclosure 200, more heat can be conducted to the outside of the photovoltaic energy storage device through the heat conduction part 1210 and the energy storage heat conduction enclosure 200, thereby reducing the accumulation of heat inside the photovoltaic energy storage device and ultimately improving the energy storage stability of the battery module 400.

[0046] Please see Figure 2 and Figure 3 In some embodiments, the energy storage heat conduction box 200 includes a main box 210 and a heat conduction cover 220 that are interlocked with each other; the MPPT controller 100 is disposed inside the main box 210 and attached to the inner wall of the main box 210; the heat conduction part 1210 makes thermal contact with the inner surface of the heat conduction cover 220. It can be understood that by attaching the MPPT controller 100 to the inner wall of the main box 210, the MPPT controller 100 and the inner wall of the main box 210 are in close contact with each other, and the heat conduction part 1210 makes thermal contact with the inner surface of the heat conduction cover 220, so that the MPPT controller 100 can be more securely installed inside the energy storage heat conduction box 200, while the MPPT controller 100 can maintain good heat transfer with the energy storage heat conduction box 200. The inner surface of the heat-conducting cover 220 has a concave-convex heat dissipation structure, and the heat-conducting cover 220 is an aluminum cover plate, which allows the heat inside the energy storage heat-conducting box 200 to dissipate better. Furthermore, a sealing gasket 230 is provided between the main box 210 and the heat-conducting cover 220 to maintain good airtightness of the energy storage heat-conducting box 200.

[0047] Please see Figure 3 In some embodiments, the energy storage enclosure structure also includes a cooling fan 300 and a temperature sensor (not shown) electrically connected to each other. Both the cooling fan 300 and the temperature sensor are installed inside the energy storage heat-conducting enclosure 200. The air outlet of the cooling fan 300 faces the MPPT controller 100, and the temperature sensor is used to detect the temperature of the MPPT controller 100. It can be understood that since the cooling fan 300 is electrically connected to the temperature sensor, when the temperature sensor detects that the temperature of the MPPT controller 100 reaches a critical temperature, the air outlet of the cooling fan 300 blows air towards the MPPT controller 100 to rapidly cool it down. The critical temperature is the highest temperature at which the MPPT controller 100 can operate normally. Specifically, the cooling fan 300 is equipped with a protective mesh 310 to prevent wires and devices from being inserted into the cooling fan 300.

[0048] It should be noted that the methods for detecting the temperature of the MPPT controller 100 by the temperature sensor and the methods for starting the cooling fan 300 based on the temperature sensor are existing technologies and are not within the scope of protection of this application, so they will not be described in detail here.

[0049] Please see Figure 2In some embodiments, the charging control assembly 110 includes at least one of a control circuit board, a MOSFET, and an inductor. The power amplifier component 1110 is the main component in the charging control assembly 110 that outputs power, i.e., the main component that generates operating temperature. In this embodiment, the power amplifier component 1110 is a control circuit board, which is located close to the heat dissipation section 1210.

[0050] Please see Figures 1 to 3 This disclosure also provides a photovoltaic energy storage device, including a battery module 400 and an energy storage housing structure according to any of the above embodiments; the battery module 400 is installed inside the energy storage heat-conducting housing 200, and the charging control component 110 is electrically connected to the battery module 400. It can be understood that by applying the energy storage housing structure of this disclosure to a photovoltaic energy storage device, more heat can be conducted to the outside of the photovoltaic energy storage device through the heat outlet 1210 and the energy storage heat-conducting housing 200, thereby reducing the impact of heat on the battery module 400.

[0051] Compared with the prior art, this disclosure has at least the following advantages:

[0052] The MPPT controller 100 described above, since the charging control component 110 is installed in the glue injection cavity of the metal heat-conducting housing 120, after at least a part of the power amplifier component 1110 of the charging control component 110 and the inner wall of the glue injection cavity are filled with thermally conductive adhesive, the thermally conductive adhesive will solidify and maintain close contact with the power amplifier component 1110 and the inner wall of the glue injection cavity respectively. In this way, the main heat generated when the charging control component 110 is working can be stably transferred to the metal heat-conducting housing 120 through the thermally conductive adhesive, and then thermally contacted with the inner surface of the energy storage heat-conducting box 200 through the heat outlet 1210. This allows more heat to be conducted to the outside of the photovoltaic energy storage device through the heat outlet 1210 and the energy storage heat-conducting box 200, thereby reducing the accumulation of heat inside the photovoltaic energy storage device and ultimately improving the energy storage stability of the battery module 400.

[0053] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An MPPT controller (100), comprising: A charging control assembly (110) is used to be electrically connected to a solar panel and a battery module (400) respectively, so that the battery module (400) can be powered by the solar panel; The MPPT controller (100) is characterized in that it further includes a metal thermally conductive housing (120); The outer surface of the metal heat-conducting housing (120) has a heat-exiting part (1210), which is used to conduct heat to contact the inner surface of the energy storage heat-conducting box (200); a glue injection cavity is formed inside the metal heat-conducting housing (120), and the charging control assembly (110) is installed in the glue injection cavity; at least a portion of the power amplifier component (1110) of the charging control assembly (110) is provided with a cured thermal conductive adhesive between itself and the inner wall of the glue injection cavity, so that the charging control assembly (110) maintains heat transfer with the metal heat-conducting housing (120) through the thermal conductive adhesive.

2. The MPPT controller (100) according to claim 1, characterized in that, A filling gap (1201) is formed between the charging central control component (110) and the inner wall of the injection cavity, and the filling gap (1201) is used to fill the heat-conducting adhesive.

3. The MPPT controller (100) according to claim 1, characterized in that, The metal heat-conducting housing (120) has a heat dissipation opening (1202) which is connected to the injection cavity; the heat dissipation opening (1202) is directed toward the flow path of the air blown out by the cooling fan (300).

4. The MPPT controller (100) according to claim 1, characterized in that, The heat outlet section (1210) is provided with a flexible heat transfer plate (1220), and the two sides of the flexible heat transfer plate (1220) are used to be attached to the outer surface of the metal heat-conducting shell (120) and the inner surface of the energy storage heat-conducting box (200), respectively.

5. The MPPT controller (100) according to claim 4, characterized in that, The flexible heat transfer sheet is a thermally conductive silicone sheet or a thermally conductive silicone sheet.

6. The MPPT controller (100) according to claim 1, characterized in that, The thermally conductive adhesive is a potting compound or a thermally conductive adhesive; and / or... The metal thermally conductive housing (120) is an aluminum housing or a copper housing; and / or, The power amplifier component (1110) of the charging control assembly (110) is located close to the heat dissipation part (1210).

7. An energy storage box structure, characterized in that, It includes an energy storage heat conduction box (200) and an MPPT controller (100) according to any one of claims 1 to 6; the MPPT controller (100) is installed inside the energy storage heat conduction box (200), and the heat conduction part (1210) makes thermal contact with the inner surface of the energy storage heat conduction box (200).

8. The energy storage box structure according to claim 7, characterized in that, The energy storage heat conduction box (200) includes a main box (210) and a heat conduction cover (220) that are interlocked with each other; the MPPT controller (100) is located inside the main box (210) and is attached to the inner wall of the main box (210); the heat conduction part (1210) makes thermal contact with the inner surface of the heat conduction cover (220).

9. The energy storage box structure according to claim 7, characterized in that, The energy storage box structure also includes a cooling fan (300) and a temperature sensor that are electrically connected to each other. The cooling fan (300) and the temperature sensor are both installed inside the energy storage heat conduction box (200). The air outlet of the cooling fan (300) faces the MPPT controller (100), and the temperature sensor is used to detect the temperature of the MPPT controller (100).

10. A photovoltaic energy storage device, characterized in that, The device includes a battery module (400) and an energy storage housing structure as described in any one of claims 7 to 9; the battery module (400) is installed inside the energy storage heat conduction housing (200), and the charging control component (110) is electrically connected to the battery module (400).

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