Energy storage equipment and heat dissipation method thereof

Abstract

The invention discloses an energy storage device and a heat dissipation method thereof, the energy storage device comprises a first circuit board, the first circuit board comprises a main control unit and at least one power unit, and the main control unit is electrically connected with the power unit; the inverter module comprises an inversion driving unit and a fan, the inversion driving unit is electrically connected with the fan and the main control unit, and the fan forms flowing airflow to flow through the power unit; and the main control unit is used for issuing a fan starting instruction to the inverter driving unit to start the fan to dissipate heat of the power unit when the temperature of the power unit is higher than a first high-temperature threshold value. According to the invention, the main control unit not only can drive the fan to dissipate heat for the inverter module, but also can dissipate heat for the power unit by using the inherent fan in the inverter module; the size and the cost can be reduced, and the size reduction and the portability of the whole machine are facilitated; and the output power of the power unit does not need to be reduced at high temperature, and the conditions of insufficient load capacity, complete incapability of use and failure of the whole machine are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage systems, and in particular to an energy storage device and a heat dissipation method thereof. Background Art

[0002] Current energy storage devices include motherboards, which contain multiple DC-DC power circuits. When these circuits operate, they lose energy due to power conversion efficiency. This energy loss is converted into a large amount of heat, which is dissipated and causes the energy storage device to heat up.

[0003] Currently, portable energy storage devices employ two main cooling measures. The first involves increasing the heat dissipation area of ​​the main heat-generating components in the DC-DC power supply circuit, which increases the circuit's size and cost. The second involves reducing the DC-DC power supply circuit's output power when the temperature is too high, which can result in insufficient load capacity. Summary of the Invention

[0004] The present invention provides an energy storage device and a heat dissipation method thereof, so as to solve the problems of existing energy storage systems such as large volume, high cost, and insufficient load capacity.

[0005] According to one aspect of the present invention, there is provided an energy storage device, comprising:

[0006] a first circuit board, the first circuit board comprising a main control unit and at least one power unit, the main control unit being electrically connected to the power unit;

[0007] An inverter module, the inverter module including an inverter drive unit and a fan, the inverter drive unit being electrically connected to the fan and the main control unit, respectively, and the fan forming a flow of air through the power unit;

[0008] The main control unit is configured to send a fan start instruction to the inverter drive unit to start the fan to dissipate heat for the power unit when the temperature of the power unit is higher than a first high temperature threshold.

[0009] Furthermore, the main control unit is configured to control the fan speed to an i-th speed corresponding to the i-th power high temperature interval when the temperature of the power unit is in the i-th power high temperature interval, where i is greater than or equal to 1;

[0010] The lower limit endpoint of the first high-temperature power interval is the first high-temperature threshold, and the upper limit endpoint of the i-th high-temperature power interval is the lower limit endpoint of the (i+1)-th high-temperature power interval.

[0011] Furthermore, the main control unit is used to send a fan shutdown instruction to the inverter drive unit to turn off the fan when the temperature of the first circuit board is lower than the first high temperature threshold and / or the temperature drop difference of the first circuit board is greater than or equal to the first temperature difference.

[0012] Furthermore, the energy storage device includes: a battery module, and the first circuit board further includes at least one transmission port;

[0013] The at least one power unit includes: a primary buck power unit and a secondary buck power unit electrically connected to each other, the primary buck power unit is electrically connected to the battery pack module, and the secondary buck power unit is electrically connected to the transmission port.

[0014] Furthermore, the inverter module includes: an inverter main body, and the inverter drive unit is electrically connected to the inverter main body;

[0015] The main control unit is used to control the inverter body to be turned on or off through the inverter drive unit, and when the temperature of the turned-on inverter body is higher than a second high temperature threshold, send a fan turn-on instruction to the inverter drive unit to turn on the fan to dissipate heat for the inverter body.

[0016] Further, when the temperature of the power unit is lower than the first high temperature threshold, the main control unit is configured to control the speed of the fan to a jth speed corresponding to the jth inverter high temperature interval when the temperature of the turned-on inverter body is in the jth inverter high temperature interval, where j is greater than or equal to 1;

[0017] The lower limit endpoint of the first inverter high temperature interval is the second high temperature threshold, and the upper limit endpoint of the jth inverter high temperature interval is the lower limit endpoint of the (j+1)th inverter high temperature interval.

[0018] Furthermore, when the temperature of the power unit is higher than the first high temperature threshold, the main control unit is configured to control the rotation speed of the fan in combination with the temperature of the turned-on inverter body and the temperature of the power unit.

[0019] Furthermore, the main control unit is used to obtain the first speed of the fan according to the temperature of the turned-on inverter body and the second speed of the fan according to the temperature of the power unit, and control the target speed of the fan based on the maximum speed value of the first speed and the second speed.

[0020] Furthermore, the target rotation speed of the fan is a times the maximum rotation speed value, where a is greater than or equal to 1 and less than or equal to 2.

[0021] According to another aspect of the present invention, a heat dissipation method for an energy storage device is provided, wherein the energy storage device comprises: a first circuit board, the first circuit board comprising a main control unit and at least one power unit, the main control unit being electrically connected to the power unit; an inverter module, the inverter module comprising an inverter drive unit and a fan, the inverter drive unit being electrically connected to the fan and the main control unit, respectively, the fan forming an airflow to flow through the power unit;

[0022] The heat dissipation method of the main control unit includes:

[0023] When it is detected that the temperature of the power unit is higher than a first high temperature threshold, a fan start instruction is sent to the inverter drive unit to start the fan to dissipate heat for the power unit.

[0024] In the present invention, the inverter module of the energy storage device includes an inverter drive unit and a fan. When the fan is turned on, a flow of air can be formed to flow through the power unit to reduce the temperature of the power unit. The specific optional fan is installed on the side close to the power unit. The main control unit can not only drive the fan to dissipate heat for the inverter module, but also drive the fan to dissipate heat for the power unit when it detects that the temperature of the power unit is higher than the first high temperature threshold. In the present invention, the inherent fan in the inverter module is used to dissipate heat for the power unit, which can reduce the heat generated by the power unit to achieve the effect of reducing temperature rise; based on this, the fan and heat sink do not need to be designed in the first circuit board, which will not increase the board frame area of ​​the first circuit board, can reduce the volume and cost, and is conducive to reducing the volume and portability of the whole machine; in addition, when the temperature of the power unit is higher than the first high temperature threshold, the fan of the inverter module is used to dissipate heat for the power unit, which can reduce the ambient temperature on the surface of the first circuit board to an appropriate temperature, thereby achieving the purpose of cooling the power unit in the first circuit board. There is no need to reduce the output power of the power unit at high temperature, which can ensure the working reliability and stability of the energy storage equipment, improve the customer experience, and avoid insufficient load capacity, complete unusability and failure of the whole machine, prevent the problem of damage to the components of the first circuit board due to high temperature, and increase the service life of the whole machine.

[0025] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 is a schematic diagram of an energy storage device provided by an embodiment of the present invention;

[0028] Figure 2 is a schematic diagram of another energy storage device provided by an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of another energy storage device provided by an embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of a heat dissipation method for an energy storage device provided by an embodiment of the present invention;

[0031] Figure 5 is a schematic diagram of another heat dissipation method for an energy storage device provided by an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of another heat dissipation method for energy storage equipment provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Current energy storage devices include a motherboard, which contains multiple DC-DC power supply circuits. These circuits include a primary step-down power supply circuit and a secondary step-down power supply circuit. For example, a primary step-down power supply circuit reduces the voltage of the energy storage device's battery pack to 24V, and a secondary step-down power supply circuit reduces the energy storage device's electrical energy for external discharge. Typically, a motherboard contains multiple secondary step-down power supply circuits, such as a secondary step-down power supply circuit for external discharge to the energy storage device's Type-C port, a secondary step-down power supply circuit for external discharge to the energy storage device's USB port, and a secondary step-down power supply circuit for external discharge to other ports of the energy storage device. When the DC-DC power supply circuit is operating, energy loss occurs during the energy conversion process due to energy conversion efficiency. This lost energy is converted into a large amount of heat and dissipated externally, causing the energy storage device to heat up. This can be particularly problematic for portable energy storage devices, where excessive temperature rise is a problem. Take the first-stage step-down power supply circuit on the motherboard of a portable energy storage device as an example. This first-stage step-down power supply circuit includes the approximately 300W power output of the entire motherboard. The heat generated during the power conversion process will increase the ambient temperature inside the device, causing the motherboard or other circuit board components to overheat and damage the components, shortening the service life of the entire device.

[0036] Currently, portable energy storage devices employ two main cooling measures. The first is to increase the heat dissipation area of ​​the main heat-generating components in the DC-DC power supply circuit, such as by expanding the board frame area or adding heat sinks. The second is to reduce the output power of the heat-generating components in the DC-DC power supply circuit when the component temperature is detected to be too high. This reduces the heat generated by the DC-DC power supply circuit and thus reduces the temperature rise.

[0037] However, the first cooling solution increases the size and cost of the DC-DC power supply circuit, hindering the overall size and portability of the device. The second cooling solution reduces power when high temperatures are detected, which can affect the user experience and may even result in insufficient load capacity or complete unusability.

[0038] To address the problems of the prior art, an embodiment of the present invention provides an energy storage device. Compared to the first cooling solution, the energy storage device provided by the embodiment of the present invention does not increase the size and cost of the DC-DC power supply circuit, which facilitates the reduction of the size and portability of the entire device. Compared to the second cooling solution, the energy storage device provided by the embodiment of the present invention does not need to reduce power when high temperatures are detected, which improves the customer experience and avoids problems such as insufficient load capacity and complete device failure. The specific structure of the energy storage device provided by the embodiment of the present invention will be described in detail below.

[0039] Figure 1 This is a schematic diagram of an energy storage device provided by an embodiment of the present invention. This embodiment is applicable to the case of heat dissipation of energy storage devices. Figure 1As shown, the energy storage device includes: a first circuit board 110, the first circuit board 110 includes a main control unit 111 and at least one power unit 112, the main control unit 111 is electrically connected to the power unit 112; an inverter module 120, the inverter module 120 includes an inverter drive unit 121 and a fan 122, the inverter drive unit 121 is electrically connected to the fan 122 and the main control unit 111 respectively, and the fan 122 forms a flow of air through the power unit 112; the main control unit 111 is used to send a fan start instruction to the inverter drive unit 121 to turn on the fan 122 to dissipate heat for the power unit 112 when the temperature of the power unit 112 is higher than a first high temperature threshold.

[0040] In this embodiment, the energy storage device includes a first circuit board 110, on which a main control unit 111 and at least one power unit 112 are integrated. The main control unit 111 is electrically connected to the power unit 112. Optionally, the first circuit board 110 may be a printed circuit board; the main control unit 111 may include a microcontroller unit (MCU); and the at least one power unit 112 may include at least one first-stage step-down power unit 112a and at least one second-stage step-down power unit 112b. The power unit 112 includes heat-generating power devices such as transistors (MOS) and inductors. The main control unit 111 is electrically connected to the power units 112, can independently control the operation of each power unit 112, and can collect operating parameters of each power unit 112. The present invention does not specifically limit the structures of the first circuit board, main control unit, and power unit; any first circuit board, main control unit, and power unit suitable for an energy storage device fall within the scope of protection of the present invention. The main control unit 111 can be understood as the control center of the energy storage device, and operating instructions for the energy storage device are issued from the main control unit 111 to various components.

[0041] Figure 2 is a schematic diagram of another energy storage device provided by an embodiment of the present invention, with reference to Figure 2 The optional energy storage device shown includes: a battery pack module 130, the first circuit board 110 also includes at least one transmission port (such as a Type-C port); at least one power unit 112 includes: a first-level buck power unit 112a and a second-level buck power unit 112b electrically connected to each other, the first-level buck power unit 112a is electrically connected to the battery pack module 130, and the second-level buck power unit 112b is electrically connected to the transmission port.

[0042] In this embodiment, the first-level step-down power unit 112a is electrically connected to the second-level step-down power unit 112b. The first-level step-down power unit 112a can reduce the voltage of the battery pack module 130 of the energy storage device to a corresponding DC voltage (such as 24V), and the second-level step-down power unit 112b reduces the corresponding DC voltage (such as 24V) to a corresponding DC voltage (such as 5V) and outputs it to the external load to achieve discharge; or, the electrical signal of the external load can be converted by the voltage of the second-level step-down power unit 112b and the voltage of the first-level step-down power unit 112a, and then stored in the battery pack module 130 to achieve charging. The first circuit board 110 of the energy storage device includes one or more transmission ports, and the transmission port is connected to the load. The energy storage device can be charged or discharged through the transmission port; for example, Figure 2 The secondary buck power unit 112b can be electrically connected to the Type-C port, so that the secondary buck power unit 112b of the energy storage device discharges the load through the Type-C port, or the load charges the energy storage device through the Type-C port.

[0043] The energy storage device includes an inverter module 120, which includes an inverter drive unit 121 and a fan 122. The inverter drive unit 121 is electrically connected to the fan 122 and the main control unit 111, respectively. Optionally, the inverter module 120 is integrated on a printed circuit board different from the first circuit board 110; the inverter drive unit 121 may include a microcontroller unit (MCU). It is understood that the fan 122 includes at least a fan body 122a and a fan control circuit 122b that controls the operation of the fan body 122a. The fan control circuit 122b includes at least a power supply circuit for supplying power to the fan body 122a. The inverter drive unit 121 is electrically connected to the fan 122 and controls whether the fan 122 is turned on or off. The present invention does not specifically limit the structure of the inverter drive unit and fan; any inverter drive unit and fan suitable for the energy storage device fall within the scope of protection of the present invention. Serial communication is optionally employed between the inverter drive unit 121 and the main control unit 111.

[0044] In this embodiment, the fan 122 is designed to form a flow of air through the power unit 112. For example, the optional fan 122 is installed on a side of the inverter module 120 close to the power unit 112, which facilitates the fan 122 to form a flow of air to dissipate heat from the power unit 112. The output power of the first-stage step-down power unit 112a is generally greater than the output power of the second-stage step-down power unit 112b. Accordingly, the heat generated by the first-stage step-down power unit 112a when outputting power is greater than the heat generated by the second-stage step-down power unit 112b when outputting power. Based on this, the optional fan 122 is installed on a side of the inverter module 120 close to the first-stage step-down power unit 112a. Specifically, the air outlet of the fan body 122a is close to the side of the first-stage step-down power unit 112a, which facilitates the fan 122 to form a flow of air to dissipate heat from the high-temperature power unit 112, which generates more heat.

[0045] In other embodiments, Figure 3 This is a schematic diagram of another energy storage device provided by an embodiment of the present invention, referring to Figure 3 As shown, multiple power units 112 can be optionally arranged side by side on a side close to the fan 122, which helps the fan 122 to dissipate heat for the multiple power units 112 at the same time.

[0046] The inverter module 120 also includes an inverter body 123, and an inverter drive unit 121 is electrically connected to the main control unit 111, the inverter body 123, and the fan 122. The inverter drive unit 121 controls the inverter body 123 to turn on or off according to the instructions of the main control unit 111. The main control unit 111 also controls and adjusts the operating parameters of the inverter body 123 when it is turned on. The inverter drive unit 121 controls the fan 122 to turn on or off according to the instructions of the main control unit 111. The main control unit 111 also controls and adjusts the operating parameters of the fan 122 when it is turned on, such as the fan speed. The main control unit 111 can also obtain the operating parameters of the inverter module 120 and the fan 122 through the inverter drive unit 121. In an embodiment of the present invention, the main control unit 111 can independently control the operation of the inverter body 123 and / or independently control the operation of the fan 122, that is, there is a situation in the energy storage device where the inverter body 123 is turned on and the fan 122 is turned off, and there is also a situation where the inverter body 123 is turned off and the fan 122 is turned on.

[0047] Under normal circumstances, under the control of the main control unit 111, the fan 122 in the inverter module 120 generates an airflow to dissipate heat from the inverter module 120. It should be noted that the heat dissipation process of the fan 122 considered in this embodiment is primarily controlled by the temperature of the first circuit board 110. The inverter body 123 can be in an off state or the temperature of the inverter body 123 is relatively low, so there is no need to use the fan 122 for heat dissipation. Other embodiments below will be described in detail with reference to the case where the inverter body 123 uses the fan 122 for heat dissipation; this is not considered in this embodiment.

[0048] In this embodiment, under the control of the main control unit 111, the fan 122 in the inverter module 120 can also dissipate heat for the power unit 112. The main control unit 111 is configured to send a fan-on instruction to the inverter drive unit 121 to turn on the fan 122 to dissipate heat for the power unit 112 when the temperature of the power unit 112 is higher than a first high temperature threshold. The optional fan-on instruction includes a high-level enable signal to wake up the fan 122 in the inverter module 120. Conversely, the main control unit 111 sends a fan-off instruction to the inverter drive unit 121 to turn off the fan 122. The optional fan-off instruction includes a low-level non-enable signal to control the fan 122 to be turned off. Based on this, the main control unit 111 can independently control the fan 122 in the inverter module 120 to turn on or off according to the temperature of the power unit 112, which is beneficial for the fan 122 to dissipate heat for the power unit 112. Accordingly, there is no need to set a fan in the first circuit board 110.

[0049] The main control unit 111 is preset with a first high temperature threshold for the power unit 112, which is used to determine whether heat dissipation of the power unit 112 is required. Specifically, the main control unit 111 obtains the temperature of the power unit 112. When it detects that the temperature of at least one power unit 112 is higher than the first high temperature threshold, it sends a fan start instruction to the inverter drive unit 121. The inverter drive unit 121 controls the fan 122 to turn on according to the fan start instruction, so that the fan 122 can blow air to dissipate heat for the adjacent power units 112.

[0050] It is understood that one or more temperature detection points are designed in the first circuit board 110, and a temperature sensor is installed at the temperature detection point. The optional temperature sensor is a negative temperature coefficient temperature sensor (NTC) or a positive temperature coefficient temperature sensor (PTC). Exemplarily, the temperature detection points of the first circuit board 110 include at least one of the following situations: 1) a temperature sensor is attached to the power unit 112; 2) a temperature sensor is installed at a position adjacent to the power unit 112; 3) a temperature sensor is attached to the main control unit 111; 4) a temperature sensor is installed at a position adjacent to the main control unit 111; 5) a temperature sensor is installed between the main control unit 111 and the power unit 112. When the main control unit 111 detects that the temperature of at least one temperature detection point is higher than the first high temperature threshold, it sends a fan start command to the inverter drive unit 121; or when the main control unit 111 detects that the average temperature value of multiple temperature detection points is higher than the first high temperature threshold, it sends a fan start command to the inverter drive unit 121.

[0051] The optional main control unit 111 is used to control the speed of the fan 122 to the i-th speed corresponding to the i-th power high temperature interval when the temperature of the power unit 112 is in the i-th power high temperature interval, where i is greater than or equal to 1; wherein the lower limit endpoint of the 1st power high temperature interval is the first high temperature threshold, and the upper limit endpoint of the i-th power high temperature interval is the lower limit endpoint of the (i+1)th power high temperature interval.

[0052] In this embodiment, the main control unit 111 includes multiple high-temperature power intervals arranged continuously from small to large, wherein the upper endpoint temperature in the high-temperature power interval is greater than the lower endpoint temperature, the lower endpoint temperature of the i-th high-temperature power interval is the upper endpoint temperature of the (i-1)th high-temperature power interval, and the upper endpoint temperature of the i-th high-temperature power interval is the lower endpoint temperature of the (i+1)th high-temperature power interval. The lower endpoint temperature of the first high-temperature power interval with the lowest temperature is the first high-temperature threshold. The main control unit 111 includes a fan speed value corresponding to each high-temperature power interval. The i-th speed corresponding to the i-th high-temperature power interval can be greater than or equal to the (i-1)th speed corresponding to the (i-1)th high-temperature power interval, and the i-th speed corresponding to the i-th high-temperature power interval can be less than or equal to the (i+1)th speed corresponding to the (i+1)th high-temperature power interval. It is understood that before leaving the factory, based on product conditions or test conditions, multiple high-temperature power intervals and the speed corresponding to each high-temperature power interval are reasonably designed, and the obtained power unit temperature data model is stored in the main control unit 111.

[0053] In actual applications, the main control unit 111 obtains the temperature of the power unit 112. When it is detected that the temperature of at least one power unit 112 is higher than a first high temperature threshold, the main control unit 111 determines the target high power temperature range in which the temperature of the power unit 112 is located based on a plurality of preset high power temperature ranges and the speeds corresponding to each high power temperature range. If the main control unit 111 detects that the target high power temperature range in which the temperature of the power unit 112 is located is the i-th high power temperature range, a fan start instruction is issued to the inverter drive unit 121. The fan start instruction carries the i-th speed corresponding to the i-th high power temperature range. Based on this, the inverter drive unit 121 controls the speed of the fan 122 to the i-th speed according to the fan start instruction, thereby enabling the fan 122 to dissipate heat for the power unit 112.

[0054] In this embodiment, the speed of fan 122 is appropriately adjusted based on the varying high temperatures of power unit 112. The higher the temperature of power unit 112, the higher the speed of fan 122. This facilitates rapid heat dissipation and cooling of the high-temperature power unit 112, preventing damage to components of first circuit board 110 due to excessive temperature rise, and thereby extending the service life of the entire device. It is understood that relevant practitioners may appropriately adjust the speed of fan 122 and the power unit cooling strategy based on product requirements, and are not limited to the above examples.

[0055] The optional main control unit 111 is used to send a fan-off instruction to the inverter drive unit 121 to turn off the fan 122 when the temperature of the first circuit board 110 is lower than the first high temperature threshold and / or the temperature drop difference of the first circuit board 110 is greater than or equal to the first temperature difference. In this embodiment, the first high temperature threshold and the first temperature difference are pre-stored in the main control unit 111. When the main control unit 111 detects that the temperature of the first circuit board 110 is less than or equal to the first high temperature threshold, it can send a fan-off instruction to the inverter drive unit 121 to turn off the fan 122, thereby turning off the fan when the power unit 112 is at a low temperature and reducing power consumption. Alternatively, when the main control unit 111 detects that the temperature of the first circuit board 110 is dropping and the temperature drop amplitude of the first circuit board 110 is greater than or equal to the first temperature difference, it can send a fan-off instruction to the inverter drive unit 121 to turn off the fan 122, thereby turning off the fan 122 when the power unit 112 is rapidly cooled and reducing power consumption. Alternatively, when the main control unit 111 detects that the first circuit board 110 is cooled down, the cooling amplitude of the first circuit board 110 is greater than or equal to the first temperature difference and the temperature of the first circuit board 110 is lower than the first high temperature threshold, the main control unit 111 can send a fan-off instruction to the inverter drive unit 121 to turn off the fan 122.

[0056] For example, the first high temperature threshold is 90°C and the first temperature difference is 15°C. When the main control unit 111 detects that the temperature of the first circuit board 110 drops from 120°C to 89°C, that is, the temperature drop of the first circuit board 110 (31°C) is greater than the first temperature difference of 15°C and the temperature of the first circuit board 110 of 89°C is lower than the first high temperature threshold of 90°C, the main control unit 111 controls the fan 122 to turn off.

[0057] The optional energy storage device includes a display panel, and the main control unit 111 is electrically connected to the display panel. If the inverter body 123 is turned off and the fan 122 is turned on, the main control unit 111 controls the display panel to not display the inverter on mark and controls the switch indicator light of the inverter module 120 to turn off. This can prevent the user from mistakenly thinking that the inverter is turned on and erroneously operating the energy storage device. Conversely, if the inverter body 123 is turned on, the main control unit 111 controls the display panel to display the inverter on mark and also controls the switch indicator light of the inverter module 120 to turn on. This can provide the user with clear information that the inverter is turned on.

[0058] Based on the above, it can be seen that when the inverter body 123 is turned off or the temperature of the inverter body 123 is low and no fan 122 is needed for heat dissipation, the heat dissipation process of the energy storage device is as follows: Figure 4 shown. Figure 4 Schematic diagram of a heat dissipation method for energy storage equipment provided by an embodiment of the present invention, such as Figure 4 The heat dissipation method performed by the main control unit includes the following steps:

[0059] Step 201: Detecting the discharge of the power unit. Specifically, when the power unit discharges outward, the power unit outputs power and generates heat.

[0060] Step 202: The temperature of the power unit is collected in real time by a temperature sensor. When the power unit is continuously discharged, the ambient temperature accumulates to a certain level, which may cause the temperature of the environment in which the power unit is located to be too high.

[0061] Step 203: Determine whether the temperature of the power unit is higher than a first high temperature threshold; if so, execute step 204; if not, return to step 202;

[0062] Step 204: If the temperature of the power unit is higher than the first high temperature threshold, the inverter module is awakened and the fan is controlled to turn on. After the fan is turned on for a period of time, the power unit maintains the temperature or has cooled down.

[0063] Step 205: Determine whether the cooling amplitude of the power unit is greater than the first temperature difference; if so, execute step 206; if not, return to step 204; the first temperature difference can be designed to be greater than or equal to 10°C. If the first temperature difference is too small, the fan may be frequently started and stopped, which may affect its service life;

[0064] Step 206: Control the fan to turn off.

[0065] In the present invention, the inverter module of the energy storage device includes an inverter drive unit and a fan. When the fan is turned on, a flow of air can be formed to flow through the power unit to reduce the temperature of the power unit. The specific optional fan is installed on the side close to the power unit. The main control unit can not only drive the fan to dissipate heat for the inverter module, but also drive the fan to dissipate heat for the power unit when it detects that the temperature of the power unit is higher than the first high temperature threshold. In the present invention, the inherent fan in the inverter module is used to dissipate heat for the power unit, which can reduce the heat generated by the power unit to achieve the effect of reducing temperature rise; based on this, the fan and heat sink do not need to be designed in the first circuit board, which will not increase the board frame area of ​​the first circuit board, can reduce the volume and cost, and is conducive to reducing the volume and portability of the whole machine; in addition, when the temperature of the power unit is higher than the first high temperature threshold, the fan of the inverter module is used to dissipate heat for the power unit, which can reduce the ambient temperature on the surface of the first circuit board to an appropriate temperature, thereby achieving the purpose of cooling the power unit in the first circuit board. There is no need to reduce the output power of the power unit at high temperature, which can ensure the working reliability and stability of the energy storage equipment, improve the customer experience, and avoid insufficient load capacity, complete unusability and failure of the whole machine, prevent the problem of damage to the components of the first circuit board due to high temperature, and increase the service life of the whole machine.

[0066] refer to Figure 1 As shown, the optional inverter module 120 includes: an inverter body 123, an inverter drive unit 121 electrically connected to the inverter body 123; the main control unit 111 is used to control the inverter body 123 to be turned on or off through the inverter drive unit 121, and when the temperature of the turned-on inverter body 123 is higher than the second high temperature threshold, the main control unit 111 sends a fan start instruction to the inverter drive unit 121 to turn on the fan 122 to dissipate heat for the inverter body 123.

[0067] In this embodiment, the main control unit 111 is electrically connected to the inverter body 123 through the inverter drive unit 121. The main control unit 111 serves as the control center of the energy storage device and can control the inverter body 123 to be turned on or off. The main control unit 111 also controls and adjusts the operating parameters of the inverter body 123. The inverter body 123 generates heat during operation, so the main control unit 111 can control the operating state and operating parameters of the fan 122 according to the temperature of the inverter body 123. The main control unit 111 is preset with a second high temperature threshold for the inverter body 123 to determine whether the inverter body 123 needs to be cooled.

[0068] It should be noted that the heat dissipation process of the fan 122 considered in this embodiment is primarily controlled by the temperature of the inverter body 123. The power unit 112 may be in an off state or the temperature of the power unit 112 may be low, so there is no need to use the fan 122 for heat dissipation. Other embodiments below will describe in detail the case where both the high-temperature inverter body 123 and the high-temperature power unit 112 are cooled by the fan 122, which is not considered in this embodiment.

[0069] In this embodiment, under the control of the main control unit 111, the main control unit 111 controls the operating state and operating parameters of the fan 122 based on the temperature of the inverter body 123, so that the fan 122 dissipates heat from the inverter body 123. Specifically, the main control unit 111 obtains the temperature of the inverter body 123. When it detects that the temperature of the inverter body 123 is higher than a second high temperature threshold, it issues a fan-on instruction to the inverter drive unit 121 to control the fan 122 to turn on. The fan 122 can then draw air to dissipate heat from the inverter body 123. Conversely, when it detects that the temperature of the inverter body 123 is lower than the second high temperature threshold, the main control unit 111 controls the fan 122 to turn off, thereby reducing power consumption in low-temperature environments.

[0070] It is understood that the inverter module 120 is designed with one or more temperature detection points, each of which is equipped with a temperature sensor. Exemplarily, the temperature detection points of the inverter module 120 include at least one of the following: 1) a temperature sensor attached to the inverter body 123; 2) a temperature sensor installed adjacent to the inverter body 123; 3) a temperature sensor attached to the inverter drive unit 121; 4) a temperature sensor installed adjacent to the inverter drive unit 121; 5) a temperature sensor installed between the inverter drive unit 121 and the inverter body 123. When the main control unit 111 detects that the temperature of at least one temperature detection point is higher than the second high temperature threshold, it issues a fan-on command to the inverter drive unit 121; or, when the main control unit 111 detects that the average temperature of multiple temperature detection points is higher than the second high temperature threshold, it issues a fan-on command to the inverter drive unit 121.

[0071] Optionally, when the temperature of the power unit 112 is lower than the first high temperature threshold, the main control unit 111 is used to control the speed of the fan 122 to the jth speed corresponding to the jth inversion high temperature interval when the temperature of the turned-on inverter body 123 is in the jth inversion high temperature interval, where j is greater than or equal to 1; wherein the lower limit endpoint of the 1st inversion high temperature interval is the second high temperature threshold, and the upper limit endpoint of the jth inversion high temperature interval is the lower limit endpoint of the (j+1)th inversion high temperature interval.

[0072] In this embodiment, the main control unit 111 includes multiple inverter high-temperature intervals arranged sequentially from small to large. The upper endpoint temperature of each inverter high-temperature interval is greater than the lower endpoint temperature. The lower endpoint temperature of the jth inverter high-temperature interval is the upper endpoint temperature of the (j-1)th inverter high-temperature interval, and the upper endpoint temperature of the jth inverter high-temperature interval is the lower endpoint temperature of the (j+1)th inverter high-temperature interval. The lower endpoint temperature of the first inverter high-temperature interval, which has the lowest temperature, is the second high-temperature threshold. The main control unit 111 includes a fan speed value corresponding to each inverter high-temperature interval. The jth speed corresponding to the jth inverter high-temperature interval can be greater than or equal to the (j-1)th speed corresponding to the (j-1)th inverter high-temperature interval and less than or equal to the (j+1)th speed corresponding to the (j+1)th inverter high-temperature interval. It is understood that before shipment, multiple inverter high-temperature intervals and the speeds corresponding to each inverter high-temperature interval are reasonably designed based on product conditions or testing conditions, and the obtained inverter temperature data model is stored in the main control unit 111. The optional inverter temperature data model and the power unit temperature data model may be the same as or different from each other.

[0073] In actual applications, the main control unit 111 obtains the temperature of the inverter body 123. When it is detected that the temperature of the inverter body 123 is higher than the second high temperature threshold, the main control unit 111 determines the target inverter power high temperature interval in which the temperature of the inverter body 123 is located from a plurality of preset inverter high temperature intervals. If the main control unit 111 detects that the target inverter power high temperature interval in which the temperature of the inverter body 123 is located is the j-th inverter high temperature interval, a fan start instruction is issued to the inverter drive unit 121. The fan start instruction carries the j-th speed corresponding to the j-th inverter high temperature interval. Based on this instruction, the fan 122 is turned on and the speed of the fan 122 is adjusted to the j-th speed, thereby allowing the fan 122 to dissipate heat for the inverter body 123.

[0074] In this embodiment, the speed of fan 122 is appropriately adjusted based on the varying high temperatures of inverter body 123. The higher the temperature of inverter body 123, the higher the speed of fan 122. This facilitates rapid heat dissipation and cooling of the high-temperature inverter body 123, preventing damage to components of inverter module 120 due to excessive temperature rise, and thereby extending the service life of the entire device. It is understood that relevant practitioners can appropriately adjust the speed of fan 122 and the inverter cooling strategy based on product requirements, and are not limited to the above examples.

[0075] Based on the above, it can be seen that when the power unit 112 is not working or the temperature of the power unit 112 is low and no fan 122 is needed for heat dissipation, the heat dissipation process of the energy storage device is as follows: Figure 5 shown. Figure 5 Schematic diagram of another heat dissipation method for energy storage device provided by an embodiment of the present invention, such as Figure 5The heat dissipation method performed by the main control unit includes the following steps:

[0076] Step 301: Control the operation of the inverter. Specifically, when the inverter continues to operate, heat is generated.

[0077] Step 302: The temperature of the inverter body is collected in real time by a temperature sensor. When the ambient temperature accumulates to a certain level due to the continuous operation of the inverter body, the temperature of the environment in which the inverter body is located may be too high.

[0078] Step 303: Determine whether the temperature of the inverter body is higher than a second high temperature threshold; if so, execute step 304; if not, return to step 302;

[0079] Step 304: If the temperature of the inverter body is higher than the second high temperature threshold, the fan is controlled to be turned on. After the fan is turned on for a period of time, the inverter body maintains the temperature or has cooled down.

[0080] Step 305: Determine whether the temperature of the inverter body is lower than the inverter low temperature threshold; if so, execute step 306; if not, return to step 304; the inverter low temperature threshold may be less than or equal to the second high temperature threshold;

[0081] Step 306: Control the fan to turn off.

[0082] In this embodiment, the main control unit can drive the fan to dissipate heat for the inverter module, thereby preventing the components of the inverter module from being damaged due to high temperature and increasing the service life of the entire device.

[0083] Optionally, when the temperature of the power unit exceeds a first high temperature threshold, the main control unit is configured to control the fan speed based on the temperature of the powered-on inverter body and the temperature of the power unit. Optionally, the main control unit is configured to obtain a first fan speed based on the temperature of the powered-on inverter body and a second fan speed based on the temperature of the power unit, and to control a target fan speed based on the maximum of the first and second speeds. Optionally, the target fan speed is a times the maximum speed, where a is greater than or equal to 1 and less than or equal to 2.

[0084] In this embodiment, if the power unit is working and the temperature is higher than the first high temperature threshold, and the inverter body is working and the temperature is higher than the second high temperature threshold, the main control unit needs to reasonably control the fan speed based on the temperature of the inverter body and the temperature of the power unit.

[0085] Specifically, the main control unit detects the target inverter high temperature range within which the high temperature of the inverter body is located, and determines the speed corresponding to the target inverter high temperature range to which the high temperature of the inverter body belongs as the first fan speed obtained based on the temperature of the inverter body. Simultaneously, the main control unit detects the target power high temperature range within which the high temperature of the power unit is located, and determines the speed corresponding to the target power high temperature range to which the high temperature of the power unit belongs as the second fan speed obtained based on the temperature of the power unit.

[0086] In this embodiment, the main control unit uses the maximum speed value of the first speed and the second speed as the target speed of the fan, and directly controls the fan to adjust to the target speed; for example, if the first speed (2000r) is less than the second speed (2400r), the fan is controlled to adjust to the second speed (2400r). Alternatively, in other embodiments, the main control unit uses the larger value of the first speed and the second speed as the reference value for adjustment, determines the adjusted speed as the target speed of the fan, and controls the fan to adjust to the target speed; for example, if the first speed (2000r) is less than the second speed (2400r), the speed is increased by 15% based on the second speed (2400r), and the fan is controlled to rotate at the adjusted second speed (2760r).

[0087] As mentioned above, when the power unit and inverter are discharging, the heat in the entire system environment is primarily the result of the accumulation of heat from the first circuit board and the inverter module. At this time, the fan is turned on, and the fan speed logic is determined based on the inverter and power unit. For example, to achieve rapid device cooling, the required inverter speed or power unit speed can be increased by 5% to 20% to achieve rapid cooling of the energy storage device.

[0088] In this embodiment, the inverter module of the energy storage device includes an inverter drive unit and a fan, which is installed near the power unit. The main control unit utilizes the fan inherent in the inverter module to not only drive the fan to dissipate heat from the inverter module, but also to dissipate heat from the power unit when it detects that the power unit's temperature exceeds a first high-temperature threshold. This reduces the temperature rise of the energy storage device, prevents high-temperature damage to the first circuit board and components in the inverter module, and extends the service life of the entire device.

[0089] Based on the same inventive concept, an embodiment of the present invention further provides a heat dissipation method for an energy storage device. Figure 6 This is a schematic diagram of another heat dissipation method for energy storage equipment provided by an embodiment of the present invention. This embodiment is applicable to the case of heat dissipation of the energy storage equipment described in any of the above embodiments. The heat dissipation method can be executed by the main control unit described in any of the above embodiments. The main control unit can be implemented in the form of hardware and / or software. The main control unit can be configured in the first circuit board. Figure 1 and Figure 6As shown, the energy storage device includes: a first circuit board 110, the first circuit board 110 includes a main control unit 111 and at least one power unit 112, the main control unit 111 is electrically connected to the power unit 112; an inverter module 120, the inverter module 120 includes an inverter drive unit 121 and a fan 122, the inverter drive unit 121 is electrically connected to the fan 122 and the main control unit 111, and the fan 122 forms a flow of air through the power unit 112. The heat dissipation method of the main control unit includes:

[0090] Step 401: collecting and detecting the temperature of the power unit;

[0091] Step 402: When it is detected that the temperature of the power unit is higher than a first high temperature threshold, a fan start instruction is sent to the inverter drive unit to start the fan to dissipate heat for the power unit.

[0092] In the present invention, the inverter module of the energy storage device includes an inverter drive unit and a fan. When the fan is turned on, a flow of air can be formed to flow through the power unit to reduce the temperature of the power unit. The specific optional fan is installed on the side close to the power unit. The main control unit can not only drive the fan to dissipate heat for the inverter module, but also drive the fan to dissipate heat for the power unit when it detects that the temperature of the power unit is higher than the first high temperature threshold. In the present invention, the inherent fan in the inverter module is used to dissipate heat for the power unit, which can reduce the heat generated by the power unit to achieve the effect of reducing temperature rise; based on this, the fan and heat sink do not need to be designed in the first circuit board, which will not increase the board frame area of ​​the first circuit board, can reduce the volume and cost, and is conducive to reducing the volume and portability of the whole machine; in addition, when the temperature of the power unit is higher than the first high temperature threshold, the fan of the inverter module is used to dissipate heat for the power unit, which can reduce the ambient temperature on the surface of the first circuit board to an appropriate temperature, thereby achieving the purpose of cooling the power unit in the first circuit board. There is no need to reduce the output power of the power unit at high temperature, which can ensure the working reliability and stability of the energy storage equipment, improve the customer experience, and avoid insufficient load capacity, complete unusability and failure of the whole machine, prevent the problem of damage to the components of the first circuit board due to high temperature, and increase the service life of the whole machine.

[0093] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0094] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. An energy storage device, characterized in that: include: a first circuit board, the first circuit board comprising a main control unit and at least one power unit, the main control unit being electrically connected to the power unit; An inverter module, the inverter module including an inverter drive unit and a fan, the inverter drive unit being electrically connected to the fan and the main control unit, respectively, and the fan forming a flow of air through the power unit; The main control unit is configured to send a fan start instruction to the inverter drive unit to start the fan to dissipate heat for the power unit when the temperature of the power unit is higher than a first high temperature threshold.

2. The energy storage device according to claim 1, characterized in that The main control unit is configured to control the fan speed to an i-th speed corresponding to the i-th power high temperature interval when the temperature of the power unit is in the i-th power high temperature interval, where i is greater than or equal to 1; The lower limit endpoint of the first high-temperature power interval is the first high-temperature threshold, and the upper limit endpoint of the i-th high-temperature power interval is the lower limit endpoint of the (i+1)-th high-temperature power interval.

3. The energy storage device according to claim 1, characterized in that The main control unit is configured to send a fan shutoff instruction to the inverter drive unit to shut down the fan when the temperature of the first circuit board is lower than the first high temperature threshold and / or the temperature drop difference of the first circuit board is greater than or equal to the first temperature difference.

4. The energy storage device according to claim 1, characterized in that The energy storage device includes: a battery module, and the first circuit board also includes at least one transmission port; The at least one power unit includes: a primary buck power unit and a secondary buck power unit electrically connected to each other, the primary buck power unit is electrically connected to the battery pack module, and the secondary buck power unit is electrically connected to the transmission port.

5. The energy storage device according to claim 1, characterized in that The inverter module includes: an inverter main body, and the inverter drive unit is electrically connected to the inverter main body; The main control unit is used to control the inverter body to be turned on or off through the inverter drive unit, and when the temperature of the turned-on inverter body is higher than a second high temperature threshold, send a fan turn-on instruction to the inverter drive unit to turn on the fan to dissipate heat for the inverter body.

6. The energy storage device according to claim 5, characterized in that When the temperature of the power unit is lower than the first high temperature threshold, the main control unit is configured to control the speed of the fan to a jth speed corresponding to the jth inverter high temperature interval when the temperature of the turned-on inverter body is in the jth inverter high temperature interval, where j is greater than or equal to 1; The lower limit endpoint of the first inverter high temperature interval is the second high temperature threshold, and the upper limit endpoint of the jth inverter high temperature interval is the lower limit endpoint of the (j+1)th inverter high temperature interval.

7. The energy storage device according to claim 5, characterized in that When the temperature of the power unit is higher than the first high temperature threshold, the main control unit is configured to control the rotation speed of the fan in combination with the temperature of the turned-on inverter body and the temperature of the power unit.

8. The energy storage device according to claim 7, characterized in that: The main control unit is used to obtain the first speed of the fan according to the temperature of the turned-on inverter body and the second speed of the fan according to the temperature of the power unit, and control the target speed of the fan based on the maximum speed value of the first speed and the second speed.

9. The energy storage device according to claim 8, characterized in that The target rotation speed of the fan is a times the maximum rotation speed value, where a is greater than or equal to 1 and less than or equal to 2.

10. A heat dissipation method for energy storage equipment, characterized in that: The energy storage device includes: a first circuit board, the first circuit board includes a main control unit and at least one power unit, the main control unit is electrically connected to the power unit; an inverter module, the inverter module includes an inverter drive unit and a fan, the inverter drive unit is electrically connected to the fan and the main control unit respectively, and the fan forms a flow of air through the power unit; The heat dissipation method of the main control unit includes: When it is detected that the temperature of the power unit is higher than a first high temperature threshold, a fan start instruction is sent to the inverter drive unit to start the fan to dissipate heat for the power unit.

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