Fan power supply method, energy storage system and computer storage medium

Abstract

The invention discloses a fan power supply method, an energy storage system, a computer storage medium and a program product, the fan power supply method is applied to the energy storage system, the energy storage system comprises a battery pack and an energy storage electrical assembly, and a first fan arranged on the battery pack is connected with a power grid side through a first switch and connected with the battery pack through a second switch; a second fan arranged on the energy storage electrical assembly is connected with the power grid side through a third switch. The method comprises the steps that the temperature of the battery pack is obtained; determining that the temperature value of the battery pack is greater than or equal to a first preset temperature value, closing the first switch and disconnecting the second switch, determining that the first switch is normally closed, and supplying power to the first fan by the power grid side; acquiring the temperature of the energy storage electrical assembly; determining that the temperature value of the energy storage electrical assembly is greater than or equal to a second preset temperature value, closing a third switch, and supplying power to a second fan by the power grid side. According to the invention, the damage to the battery in the energy storage system can be reduced, the actually available electric quantity in the energy storage system is improved, and the safety of the energy storage system is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage systems, and in particular to a fan power supply method, an energy storage system and a computer storage medium. Background Art

[0002] With the advancement of the dual carbon goals and the construction of a new power system based on new energy, the importance of energy storage in the power system has become increasingly prominent. Lithium-ion batteries have been widely recognized by the market for their high capacity, high efficiency and high reliability. However, the life, capacity and charge and discharge rate of lithium-ion batteries are sensitive to high temperatures. Therefore, in energy storage applications, it is crucial to control the temperature of the battery and its environment, such as the temperature of the lithium-ion battery, high-voltage box, junction box and PCS cabinet.

[0003] To reduce the temperature of these components, a common method is to use batteries to power fans and use fans to dissipate heat. However, this will reduce the life of the battery, reduce the available power of the energy storage system, or cause heat spread due to battery failure and increase the cost of the energy storage system.

[0004] Therefore, how to effectively control the power supply of these fans has become a problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to solve the problems of battery life decay, reduced available power of the energy storage system, increased costs, and heat spread caused by battery failure caused by fans powered by batteries in existing energy storage systems. The present invention provides a fan power supply method, energy storage system, computer storage medium and program product, which can reduce damage to batteries in the energy storage system, increase the actual available power in the energy storage system, realize multiple protection design of battery pack fan power supply control, and enhance the safety of the energy storage system.

[0006] To solve the above technical problems, an embodiment of the present invention discloses a fan power supply method, which is applied to an energy storage system, wherein the energy storage system includes a battery pack and an energy storage electrical component, a first fan provided in the battery pack is connected to the grid side through a first switch and to the battery pack through a second switch, and a second fan provided in the energy storage electrical component is connected to the grid side through a third switch, and the method includes: obtaining the temperature of the battery pack; determining that the temperature value of the battery pack is greater than or equal to a first preset temperature value, closing the first switch and opening the second switch, determining that the first switch is closed normally, and the grid side supplies power to the first fan; obtaining the temperature of the energy storage electrical component; determining that the temperature value of the energy storage electrical component is greater than or equal to a second preset temperature value, closing the third switch, and the grid side supplies power to the second fan.

[0007] By adopting the above technical solution, by obtaining the temperature of the battery pack, and then determining, based on the temperature of the battery pack, that the temperature of the battery pack is greater than (or equal to) the first preset temperature, that is, when the battery pack is in a high temperature state (or a thermal failure state). The fan power supply method of the embodiment of the present application can preferentially use the grid-side voltage to power the first fan by closing the first switch to dissipate heat and cool the battery pack. And, by obtaining the temperature of the energy storage electrical component, and then determining, based on the temperature of the energy storage electrical component, that the temperature of the energy storage electrical component is greater than (or equal to) the second preset temperature, that is, when the energy storage electrical component is in a high temperature state. The fan power supply method of the embodiment of the present application can use the grid-side voltage to power the second fan by closing the third switch to dissipate heat and cool the energy storage electrical component (for example, a high-voltage box).

[0008] Therefore, compared with the method of using batteries of the energy storage system to power the fan in the prior art, the fan power supply method in the embodiment of the present application does not need to convert the battery voltage of the batteries in the battery pack into both direct current and alternating current, thereby extending the service life of the batteries in the battery pack, reducing the use cost of the energy storage system, and increasing the actual available power of the batteries in the battery pack in the energy storage system.

[0009] For example, the thermal runaway state mentioned in the embodiment of the present application refers to a state in which the temperature of the battery pack rises sharply due to overheating, overcharging, internal short circuit or other reasons.

[0010] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a fan power supply method, the method further comprising: determining that the first switch is not closed normally, closing the second switch, and the battery pack supplies power to the first fan.

[0011] By adopting the above technical scheme, the fan power supply method of the embodiment of the present application can also use the battery pack voltage to power the first fan by closing the second switch when the first switch is not closed normally (for example, when the output voltage value of the first switch is 0V), thereby realizing a multiple protection design for the power supply control of the first fan in the battery pack and enhancing the safety of the energy storage system of the embodiment of the present application.

[0012] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a fan power supply method, the method further comprising: determining that the temperature value of the battery pack is less than a first preset temperature value, and disconnecting the first switch and the second switch.

[0013] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a fan power supply method, the method further comprising: determining that the temperature value of the energy storage electrical component is less than a second preset temperature value, and disconnecting the third switch.

[0014] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a fan power supply method, wherein determining whether the first switch is closed normally includes: obtaining a first signal fed back by the first switch, and determining that the first switch is closed normally; wherein the first signal includes: a closing signal of the first switch and an output voltage of the first switch, and the output voltage is equal to the operating voltage of the first fan.

[0015] Exemplarily, the operating voltage of the first fan in the embodiment of the present application is a 24V DC voltage.

[0016] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a fan power supply method, wherein determining that the first switch is not closed normally includes: obtaining a second signal fed back by the first switch to determine that the first switch is not closed normally; wherein the second signal includes: a disconnection signal of the first switch and / or an output voltage of the first switch, and the output voltage is less than the operating voltage of the first fan.

[0017] An embodiment of the present invention also discloses an energy storage system, including: a first switch; a second switch; a third switch; a battery pack having a first temperature sensor; a first fan, arranged in the battery pack, the first fan being connected to the power grid side through the first switch, and the first fan being connected to the battery pack through the second switch; an energy storage electrical component having a second temperature sensor; a second fan, arranged in the energy storage electrical component, the second fan being connected to the power grid side through the third switch; a controller, respectively connected to the first temperature sensor, the first switch, the second switch, the second temperature sensor and the third switch, the controller being used to execute the fan power supply method described in any of the above embodiments.

[0018] By adopting the above technical solution, the embodiment of the present application can detect the temperature of the battery pack and the energy storage electrical component respectively through the first temperature sensor and the second temperature sensor, and compare the numerical relationship between the temperature of the battery pack and the first preset temperature through the controller to determine the state of the battery pack (for example, a high temperature state or a low temperature state), and compare the numerical relationship between the temperature of the energy storage electrical component and the second preset temperature to determine the state of the energy storage electrical component (for example, a high temperature state or a low temperature state). In addition, the embodiment of the present application also connects the controller to the first switch, the second switch and the third switch respectively to control the opening or closing of the first switch, the second switch and the third switch respectively.

[0019] Thus, the controller of the embodiment of the present application can execute the fan power supply method of the embodiment of the present application according to the different states of the battery pack and the energy storage electrical components (for example, high temperature state and low temperature state), so as to control the opening and closing of the first switch, the second switch and the third switch, control the disconnection or conduction of the power supply circuits of the grid side (or the battery pack) and the first fan and the second fan respectively, and use the first fan and the second fan to dissipate heat and cool the battery pack and the energy storage electrical components.

[0020] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an energy storage system, further comprising a switch control board, wherein the controller is respectively connected to the first switch, the second switch and the third switch through the switch control board; when the temperature value of the battery pack is greater than or equal to a first preset temperature value, the switch control board is used to send a closed switch control signal to the first switch, and an open switch control signal to the second switch, and feed back the first signal of the first switch to the controller; when the temperature value of the energy storage electrical component is greater than or equal to a second preset temperature value, the switch control board is used to send a closed switch control signal to the third switch.

[0021] By adopting the above technical solution, the embodiment of the present application is connected to the first switch, the second switch, the third switch and the controller respectively through the switch control board, so that the controller can send open or closed switch control signals to the first switch, the second switch and the third switch respectively through the switch control board on the one hand, and can also obtain feedback status signals (for example, the first signal and the second signal of the first switch) through the switch control board on the other hand.

[0022] An embodiment of the present invention further discloses a computer storage medium, including a memory and a processor, wherein the memory is suitable for storing computer instructions, and the processor is suitable for executing the fan power supply method described in any of the above embodiments when running the computer instructions.

[0023] An embodiment of the present invention further discloses a computer program product, including a computer program / instruction, wherein when the computer program / instruction is executed by a processor, the fan power supply method described in any of the above embodiments is implemented.

[0024] In order to make the above contents of the present invention more clearly understood, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram showing the structure of an energy storage system according to an embodiment of the present invention;

[0026] Figure 2A The process of the fan power supply method according to the embodiment of the present invention is shown as follows Figure 1 ;

[0027] Figure 2B Flow chart 2 showing the fan power supply method according to an embodiment of the present invention;

[0028] Figure 3 A logic schematic diagram showing a fan power supply method according to an embodiment of the present invention;

[0029] Figure 4 A block diagram of an electronic device provided by an embodiment of the present invention is shown;

[0030] Figure 5 A block diagram of a system on chip (SoC) provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0031] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0032] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0033] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0035] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0036] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] Figure 1 According to some embodiments of the present application, a structural schematic diagram of an energy storage system 1 is shown.

[0038] like Figure 1 As shown, an energy storage system 1 provided in an embodiment of the present application includes: a grid side 10, a battery pack 20, an energy storage electrical component 30 and a controller 40. Exemplarily, the energy storage electrical component 30 in the embodiment of the present application includes electrical equipment such as a high-voltage box, a junction cabinet and a power conditioning cabinet (Power Conditioning System Cabinet, referred to as a PCS cabinet), and the controller 40 in the embodiment of the present application is a battery status controller (Battery Status Controller, referred to as a BSC controller).

[0039] The battery pack 20 has a first fan 21 and a battery (not shown in the figure), and the energy storage electrical component 30 has a second fan 31. Exemplarily, the first fan 21 of the embodiment of the present application is a fan using a 24V DC power supply, and the second fan 31 is a fan using a 220V AC power supply.

[0040] It is understood that the embodiment of the present application does not limit the power supply voltage used by the first fan 21 and the second fan 31, as long as the voltage of the battery pack 20 or the grid side 10 can be used to power the first fan 21 and the second fan 31. In addition, the number of the first fan 21 and the second fan 31 in the embodiment of the present application can include one or more.

[0041] For the convenience of description, the following description is made by taking one first fan 21 and three second fans 31 , wherein the first fan 21 is a fan using a 24V DC power supply, and the second fan 31 is a fan using a 220V AC power supply as an example.

[0042] Specifically, Figure 1As shown, the energy storage system 1 of the embodiment of the present application also includes a transformer 11, a first converter 12, a second converter 22 and a switch control board 41. Among them, the grid side 10 of the embodiment of the present application is connected to the first fan 21 through the transformer 11, the first converter 12 and the first switch 51 in sequence. Thus, when the first switch 51 is in a closed state, the 220V phase voltage of the grid side 10 is converted into an AC low voltage through the transformer 11, and the AC low voltage is converted into 24V DC through the first converter 12. The 24V DC is then transmitted through the first switch 51 for voltage transmission to power the first fan 21 disposed in the battery pack 20, so that the first fan 21 can rotate, dissipate heat from the battery pack 20, and reduce the temperature of the battery pack 20.

[0043] The battery pack 20 of the embodiment of the present application is connected to the first fan 21 through the second switch 52 and the second converter 22 in sequence. Therefore, when the second switch 52 is in a closed state, the DC voltage output by the battery in the battery pack 20 (for example, the total voltage of the battery pack 20) ​​is first transmitted through the first switch 51, and then converted into 24V DC through the second converter 22 to supply power to the first fan 21 disposed in the battery pack 20, so that the first fan 21 can rotate, dissipate heat from the battery pack 20, and reduce the temperature of the battery pack 20.

[0044] Exemplarily, the first converter 12 of the embodiment of the present application is an isolated AC-DC converter, which is used to convert AC into DC, and provides electrical isolation between the input end (e.g., one end connected to the transformer 11) and the output end (e.g., one end connected to the first switch 51), preventing high voltage from affecting low voltage loads, thereby improving the safety of the power storage system. The second converter 22 is an isolated DC-DC converter, which is used to convert DC into DC with different voltage levels, and provides electrical isolation between the input end (e.g., one end connected to the second switch 52) and the output end (e.g., one end connected to the first fan 21), preventing high voltage from affecting low voltage loads, thereby improving the safety of the power storage system. However, it is not limited to this, and the embodiment of the present application does not limit the types of the first converter 12 and the second converter 22, for example, they can also be non-isolated AC-DC converters and non-isolated DC-DC converters.

[0045] Continue to refer Figure 1, the above-mentioned grid side 10 is also connected to the second fan 31 through the third switch 53. Therefore, when the third switch 53 is in a closed state, the 220V phase voltage of the grid side 10 is transmitted through the third switch 53 to supply power to the second fan 31 respectively arranged in the high-voltage box, the junction cabinet and the PCS cabinet (not shown in the figure), so that the second fan 31 can rotate, dissipate heat from the high-voltage box, the junction cabinet and the PCS cabinet, and reduce the temperature of the energy storage electrical component 30.

[0046] In addition, the battery pack 20 of the embodiment of the present application further includes a first temperature sensor 23, which is used to detect the temperature of the battery pack 20. The high-voltage box, the junction cabinet and the PCS cabinet of the embodiment of the present application all include a second temperature sensor 32, which is used to detect the temperature of the high-voltage box, the junction cabinet and the PCS cabinet respectively. The controller 40 is connected to the first temperature sensor 23 and the second temperature sensor 32 respectively. Thus, the first temperature sensor 23 can detect the real-time temperature in the battery pack 20 and send the temperature signal of the battery pack 20 to the controller 40, and the second temperature sensor 32 can detect the real-time temperature in the high-voltage box, the junction cabinet and the PCS cabinet respectively, and send the temperature signal of the high-voltage box, the junction cabinet and the PCS cabinet respectively to the controller 40.

[0047] In addition, the controller 40 of the embodiment of the present application is also connected to the first switch 51, the second switch 52 and the third switch 53 through the switch control board 41. That is, the switch control board 41 is respectively connected to the first switch 51, the second switch 52 and the third switch 53, and the controller 40 is connected to the switch control board 41. Thus, the switch control board 41 can feed back the state signals of the first switch 51, the second switch 52 and the third switch 53 (for example, the first signal and the second signal of the first switch 51) to the controller 40. Furthermore, the controller 40 can execute a fan power supply method provided in the embodiment of the present application, and issue a control instruction (for example, a switch control signal) to the switch control board 41, and control the closing or opening of the first switch 51, the second switch 52 and the third switch 53 to control the first fan 21 and the second fan 31.

[0048] Exemplarily, the first switch 51 of the embodiment of the present application is a high-voltage control switch circuit, and the closing or opening of the first switch 51 is controlled by a voltage signal. The second switch 52 and the third switch 53 of the embodiment of the present application are low-voltage control switch circuits, and the closing or opening of the second switch 52 and the third switch 53 is controlled by a voltage signal. However, the embodiment of the present application does not specifically limit the structure of the first switch 51, the second switch 52, and the third switch 53, for example, they can also be switch devices such as relays.

[0049] The following is based on Figure 1The schematic diagram of the energy storage system 1 is shown in FIG2 , and the fan power supply method of the present application is described in detail.

[0050] Specifically, this application Figure 2A and Figure 2B The fan power supply method can be implemented by the controller 40 of the energy storage system 1 executing relevant programs.

[0051] refer to Figure 2A According to a specific embodiment of the present application, a fan power supply method provided includes the steps shown below.

[0052] S100: Obtain the temperature of the battery pack.

[0053] Here, the controller 40 of the embodiment of the present application is electrically connected to the first temperature sensor 23 in the battery pack 20, so that the controller 40 can obtain the temperature in the battery pack 20 in real time. In addition, the controller 40 can store and update the temperature signal in the battery pack 20 obtained by the first temperature sensor 23. For example, the temperature signal in the battery pack 20 obtained by the first temperature sensor 23 is stored as the battery pack temperature value T1, T1 = 40°C.

[0054] S200: Determine that the temperature value of the battery pack is greater than or equal to a first preset temperature value, close the first switch and open the second switch, determine that the first switch is normally closed, and supply power to the first fan from the grid side.

[0055] Here, first, the controller 40 of the embodiment of the present application compares the real-time battery pack temperature value T1 of the battery pack 20 obtained in the above step S100 with the first preset temperature value T01 to determine the real-time state of the battery pack 20. For example, the first preset temperature value T01 in the embodiment of the present application is 35°C, but not limited to this. The embodiment of the present application does not limit the size of the first preset temperature value T01, and different temperature values ​​can be set according to the high temperature resistance performance of different battery packs 20. For example, it can also be 30°C, 40°C, 45°C, 50°C, etc.

[0056] Specifically, the controller 40 of the embodiment of the present application obtains the battery pack temperature value T1=40°C through the first temperature sensor 23, and the first preset temperature value T01=35°C, 40°C>35°C, that is, the battery pack temperature value T1 is greater than the first preset temperature value T01. Then, the controller 40 determines that the battery pack 20 is in a high temperature state. However, it is not limited to this. In some other embodiments, for example, when the controller 40 obtains the battery pack temperature value T1=35°C through the first temperature sensor, T1=T01, that is, the battery pack temperature value T1 is equal to the first preset temperature value T01, the controller 40 can also determine that the battery pack 20 is in a high temperature state.

[0057] It can be understood that when the battery pack 20 is in a high temperature state or a thermal runaway state, the battery pack 20 needs to be cooled to reduce the temperature of the battery pack 20. That is, it is necessary to supply power to the first fan 21 in the battery pack 20 so that the first fan 21 can operate. In addition, in order to reduce the output loss of the battery pack 20 in the energy storage system, extend the service life of the battery pack 20, and increase the actual available power, the embodiment of the present application preferentially uses the voltage of the grid side 10 to supply power to the first fan 21 in the battery pack 20.

[0058] like Figure 1 As shown, since the first fan 21 is connected to the grid side 10 through the first switch 51, the controller 40 of the embodiment of the present application sends a closed switch control signal to the first switch 51 through the switch control board 41, and sends an open switch control signal to the second switch 52, so as to use the voltage of the grid side 10 to power the first fan 21.

[0059] It should be noted that the thermal runaway state mentioned in the embodiment of the present application refers to a state in which the temperature of the battery (e.g., the battery pack 20) ​​rises sharply due to overheating, overcharging, internal short circuit or other reasons. Therefore, when the controller 40 of the embodiment of the present application obtains an abnormal signal in the battery pack 20, the controller 40 can determine that the battery pack 20 is in a thermal runaway state, and use the voltage of the grid side 10 to power the first fan 21 in the battery pack 20 to dissipate heat from the battery pack 20 to avoid heat spread.

[0060] Secondly, the controller 40 of the embodiment of the present application sends a closed switch control signal to the first switch 51 through the switch control board 41, and sends an open switch control signal to the second switch 52.

[0061] Next, the controller 40 of the embodiment of the present application obtains the first signal of the first switch 51 through the switch control board 41, and determines that the first switch 51 is normally closed. In other words, the circuit between the grid side 10 and the first fan 21 is connected, and the grid side 10 outputs 220V AC power to the first fan 21 through the first switch 51 for power supply, and the first fan 21 dissipates heat and cools the battery pack 20.

[0062] It can be understood that since the switch control board 41 of the embodiment of the present application can obtain the status signal of the first switch 51 (for example, the first signal and the second signal of the first switch 51) and feed it back to the controller 40, the controller 40 of the embodiment of the present application can determine that the first switch 51 is normally closed based on the first signal of the first switch 51 obtained, or determine that the first switch 51 is not normally closed based on the second signal of the first switch 51 obtained.

[0063] Exemplarily, the first signal of the first switch 51 of the embodiment of the present application includes a closing signal of the first switch 51 and an output voltage of the first switch 51 of 24V DC voltage (i.e., a 24V output voltage signal through the first switch 51), and the second signal of the first switch 51 of the embodiment of the present application includes a disconnection signal of the first switch and an output voltage of the first switch 51 of 0V (i.e., a 0V output voltage signal through the first switch 51). However, the embodiment of the present application does not limit the type of the first switch 51 and the state signal fed back by the first switch 51, as long as the controller 40 can determine whether the grid side 10 can supply power to the first fan 21 through the first switch 51 according to the state signal fed back by the first switch 51.

[0064] Exemplarily, determining that the temperature value of the battery pack is greater than or equal to a first preset temperature value, closing the first switch and opening the second switch in step S200 of an embodiment of the present application also includes: determining that the first switch is not closed normally, closing the second switch, and the battery pack supplies power to the first fan.

[0065] Here, the controller 40 of the embodiment of the present application obtains the second signal of the first switch 51 through the switch control board 41, and determines that the first switch 51 is not closed normally, for example, the first switch 51 fails and cannot be closed normally, or the grid side 10 is not running, etc. In other words, the circuit between the grid side 10 and the first fan 21 is not conductive, and the grid side 10 cannot output 220V AC power to the first fan 21 through the first switch 51 for power supply.

[0066] At this time, in order to prevent excessively high temperature from affecting the service life of the battery pack 20, the controller 40 of the embodiment of the present application sends a closed switch control signal to the second switch 52 through the switch control board 41, so as to close the second switch 52. In other words, the circuit between the battery pack 20 and the first fan 21 is connected, and the battery pack 20 outputs 24V DC to the first fan 21 through the second switch 52 for power supply, and the first fan 21 dissipates heat and cools the battery pack 20.

[0067] Therefore, the fan power supply method of the embodiment of the present application can not only preferentially use the grid side 10 voltage to supply power to the first fan 21 by closing the first switch 51, but also use the battery pack 20 voltage to supply power to the first fan 21 by closing the second switch 52 when the first switch 51 is not closed normally, thereby realizing a multiple protection design for the power supply control of the first fan 21 in the battery pack 20 and enhancing the safety of the energy storage system of the embodiment of the present application.

[0068] refer to Figure 2B The fan power supply method of the embodiment of the present application further includes the following steps:

[0069] S300: Acquire the temperature of the energy storage electrical component.

[0070] Here, the controller 40 of the embodiment of the present application is electrically connected to the second temperature sensor 32 in the energy storage electrical component 30, so that the controller 40 can obtain the temperature in the energy storage electrical component 30 in real time. In addition, the controller 40 can store and update the temperature signal in the energy storage electrical component 30 obtained by the second temperature sensor 32. For example, the temperature signal in the high-voltage box obtained by the second temperature sensor 32 is stored as the high-voltage box temperature value T2, T2 = 80°C.

[0071] S400: Determine that the temperature value of the energy storage electrical component is greater than or equal to a second preset temperature value, close the third switch, and supply power to the second fan from the grid side.

[0072] It can be understood that when the energy storage electrical component 30 is in a high temperature state, it is necessary to dissipate heat from the energy storage electrical component 30 to reduce the temperature of the energy storage electrical component 30. That is, it is necessary to supply power to the second fan 31 in the energy storage electrical component 30 so that the second fan 31 can operate. In addition, in order to reduce the output loss of the battery pack 20 in the energy storage system, extend the service life of the battery pack 20, and increase the actual available power, the embodiment of the present application uses the voltage of the grid side 10 to supply power to the second fan 31 in the energy storage electrical component 30.

[0073] It should be noted that the energy storage electrical component 30 mentioned above in the embodiment of the present application is in a high temperature state, which means that any one or more of the three devices, the high-voltage box, the junction cabinet and the PCS cabinet, are in a high temperature state. For example, the high-voltage box is in a high temperature state; or, the high-voltage box and the PCS cabinet are both in a high temperature state; or, the high-voltage box, the junction cabinet and the PCS cabinet are all in a high temperature state, etc. In other words, as long as one of the three devices, the high-voltage box, the junction cabinet and the PCS cabinet, is in a high temperature state, the controller 40 of the embodiment of the present application controls the grid side 10 voltage to supply power to the second fan 31 in the device to dissipate heat and cool the device.

[0074] For the convenience of explanation, the following description is made by taking the high-voltage box in the energy storage electrical component 30 as an example.

[0075] Here, the controller 40 of the embodiment of the present application compares the acquired real-time temperature value T2 of the high-voltage box with the second preset temperature value T02 to determine the real-time state of the high-voltage box. For example, the second preset temperature value T02 in the embodiment of the present application is 70°C, but not limited thereto. The embodiment of the present application does not limit the size of the second preset temperature value T02, and different temperature values ​​can be set according to the high temperature resistance performance of different devices in the energy storage electrical component 30. For example, it can also be 60°C, 65°C, 75°C, 80°C, etc.

[0076] Specifically, the controller 40 of the embodiment of the present application obtains the high-voltage box temperature value T2=80°C through the second temperature sensor, and the second preset temperature value T02=70°C, 80°C>70°C, that is, the high-voltage box temperature value T2 is greater than the second preset temperature value T02. Then, the controller 40 determines that the high-voltage box is in a high-temperature state. However, it is not limited to this. In some other embodiments, for example, when the controller 40 obtains the high-voltage box temperature value T2=70°C through the second temperature sensor, T2=T02, that is, the high-voltage box temperature value T2 is equal to the second preset temperature value T02, the controller 40 can also determine that the high-voltage box is in a high-temperature state.

[0077] like Figure 1 As shown, since the second fan 31 is connected to the grid side 10 through the third switch 53, the controller 40 of the embodiment of the present application sends a closed switch control signal to the third switch 53 through the switch control board 41, so as to use the voltage of the grid side 10 to power the second fan 31. It can be understood that when the grid side 10 is not running, the energy storage system of the embodiment of the present application is usually in a shutdown state, and the energy storage electrical components 30 (such as high-voltage boxes, junction cabinets and PCS cabinets) in the energy storage system will not be in a high temperature state.

[0078] Thus, the fan power supply method of the embodiment of the present application can use the grid side 10 voltage to supply power to the second fan 31 by closing the third switch 53, so as to dissipate heat and cool the energy storage electrical component (such as a high-voltage box). Compared with the method of using the battery of the energy storage system to power the fan in the prior art, the fan power supply method of the embodiment of the present application does not need to convert the battery voltage into both 24V DC and 220V AC, which reduces the use cost of the energy storage system and increases the actual available power in the energy storage system.

[0079] It should be noted that the fan power supply method of the embodiment of the present application does not limit the order of supplying power to the first fan 21 and the second fan 31. In the above steps S100 to S400, the fan power supply method of the embodiment of the present application can supply power to the first fan 21 and the second fan 31 when the battery pack 20 is in a high temperature state or a thermal runaway state, and the energy storage electrical component 30 is in a high temperature state, so as to dissipate heat and cool the battery pack 20 and the energy storage electrical component 30.

[0080] That is, the fan power supply method of the embodiment of the present application can simultaneously obtain the temperature of the battery pack 20 and the energy storage electrical component 30 through the above-mentioned steps S100 and S300, and determine through the controller 40 according to the above-mentioned steps S200 and S400 that the battery pack 20 and the energy storage electrical component 30 are both in a high temperature state, and supply power to the first fan 21 and the second fan 31 at the same time, so as to simultaneously dissipate heat and cool down the battery pack 20 and the energy storage electrical component 30. However, it is not limited to this, for example, the fan power supply method of the embodiment of the present application can also first determine that the energy storage electrical component 30 is in a high temperature state, and supply power to the second fan 31 to dissipate heat and cool down the energy storage electrical component 30, and then determine that the battery pack 20 is in a high temperature state, and supply power to the first fan 21 to dissipate heat and cool down the battery pack 20.

[0081] refer to Figure 3 According to the energy storage system 1 and the fan power supply method provided in the embodiment of the present application, it can be known that the control logic of the first switch 51, the second switch 52 and the third switch 53 in the embodiment of the present application is:

[0082] First, when the energy storage system 1 operates normally, the controller 40 determines the state of the battery pack 20 and the state of the energy storage electrical component 30; wherein,

[0083] When the battery pack 20 is in a high temperature state (i.e., the battery pack temperature value T1 is greater than or equal to the first preset temperature value T01, T01=35° C.) or in a thermal runaway state, the controller 40 commands the switch control board to send a closing instruction (e.g., a closing switch control signal) to the first switch 51, and sends an opening instruction (e.g., an opening switch control signal) to the second switch 52;

[0084] Next, the controller 40 receives the state signal of the first switch 51 fed back by the switch control board (for example, the first signal or the second signal of the first switch 51). If the first switch 51 is in a closed state and can output 24V DC power (for example, the first switch 51 is normally closed), the controller 40 maintains the closed state of the first switch 51, and uses the voltage of the grid side 10 to supply power to the first fan 21; if the first switch 51 is still in an open state or cannot output 24V DC power (for example, the first switch 51 is not normally closed), a closing instruction is sent to the second switch 52, and the voltage of the battery pack 20 is used to supply power to the first fan 21;

[0085] On the contrary, when the battery pack 20 is in a low temperature state (i.e., the battery pack temperature value T1 is less than the first preset temperature value T01, T01 = 35°C), the controller 40 commands the switch control board to send a disconnection instruction to the first switch 51 and the second switch 52, and the grid side 10 and the battery pack 20 voltage do not supply power to the first fan 21. Exemplarily, when the first temperature sensor of the embodiment of the present application obtains the temperature signal in the battery pack 20 as the battery pack temperature value T1, and T1 = 25°C, since the first preset temperature value T01 = 35°C, 25°C < 35°C, it is determined that the battery pack temperature value T1 is less than the first preset temperature value T01. Then, the controller 40 determines that the battery pack 20 is in a low temperature state.

[0086] It can be understood that when the battery pack 20 is in a low temperature state, it is not necessary to dissipate heat from the battery pack 20. That is, it is not necessary to supply power to the first fan 21 in the battery pack 20 to operate the first fan 21. Figure 1 As shown, since the first fan 21 is connected to the grid side 10 through the first switch 51 and to the battery pack 20 through the second switch 52, the controller 40 of the embodiment of the present application sends a disconnect switch control signal to both the first switch 51 and the second switch 52 through the switch control board 41 to disconnect the circuit connection between the grid side 10 and the battery pack 20 and the first fan 21, and the first fan 21 is not running.

[0087] Similarly, when the energy storage electrical component 30 is in a high temperature state (i.e., the temperature value T2 of the energy storage electrical component 30 is greater than or equal to the first preset temperature value T02, T02 = 70°C), the controller 40 commands the switch control board to send a closing instruction to the third switch 53, and uses the grid side 10 voltage to supply power to the second fan 31;

[0088] On the contrary, when the energy storage electrical component 30 is in a low temperature state (i.e., the temperature value T2 of the energy storage electrical component 30 is less than the first preset temperature value T02, T02=70°C), the controller 40 commands the switch control board to send a disconnection instruction to the third switch 53, and the grid side 10 does not supply power to the first fan 21. Exemplarily, when the second temperature sensor of the embodiment of the present application obtains the temperature signal in the high-voltage box as the high-voltage box temperature value T2, T2=60°C, since the second preset temperature value T02=70°C, 60°C<70°C, that is, the high-voltage box temperature value T2 is less than the second preset temperature value T02. Then, the controller 40 determines that the high-voltage box is in a low temperature state.

[0089] It can be understood that when the energy storage electrical component 30 is in a low temperature state, it is not necessary to dissipate heat for the energy storage electrical component 30. That is, it is not necessary to supply power to the second fan 31 in the energy storage electrical component 30 to operate the second fan 31. Figure 1As shown, since the second fan 31 is connected to the grid side 10 through the third switch 53, the controller 40 of the embodiment of the present application sends a disconnected switch control signal to the third switch 53 through the switch control board 41 to disconnect the circuit connection between the grid side 10 and the second fan 31, and the second fan 31 is not running.

[0090] In summary, the fan power supply method provided in the embodiment of the present application can preferentially use the grid side 10 voltage to power the first fan 21 and the second fan 31, so as to dissipate heat and cool the battery pack 20 and the energy storage electrical component 30, thereby reducing damage to the battery in the energy storage system and increasing the actual available power in the energy storage system. When the grid side 10 voltage cannot be smoothly output to the first fan 21, the battery pack 20 voltage is used to power the first fan 21, thereby realizing a multiple protection design for the battery pack fan power supply control and enhancing the safety of the energy storage system.

[0091] In addition, the present invention also provides a computer storage medium, including a memory and a processor, wherein the memory is suitable for storing computer instructions, and the processor is suitable for executing the fan power supply method described in any of the above embodiments when running the computer instructions.

[0092] Reference now Figure 4 , shown is a block diagram of an electronic device 600 according to an embodiment of the present application. The electronic device 600 is, for example, a smart mobile terminal. The electronic device 600 may include one or more processors 601 coupled to a controller hub 603. For at least one embodiment, the controller hub 603 communicates with the processor 601 via a multi-branch bus such as a front-side bus (FSB), a point-to-point interface such as a QuickPath Interconnect (QPI), or a similar connection. The processor 601 executes instructions that control general types of data processing operations. In one embodiment, the controller hub 603 includes, but is not limited to, a graphics memory controller hub (GMCH, Graphics & Memory Controller Hub) (not shown) and an input / output hub (IOH, Input Output Hub) (which may be on a separate chip) (not shown), wherein the GMCH includes a memory and a graphics controller and is coupled to the IOH.

[0093] The electronic device 600 may also include a coprocessor 602 and a memory 604 coupled to a controller hub 603. Alternatively, one or both of the memory and the GMCH may be integrated within the processor, with the memory 604 and the coprocessor 602 directly coupled to the processor 601 and the controller hub 603, with the controller hub 603 and the IOH being in a single chip.

[0094] The memory 604 may be, for example, a dynamic random access memory (DRAM), a phase change memory (PCM), or a combination of the two. The memory 604 may include one or more tangible, non-temporary computer-readable media for storing data and / or instructions. Instructions are stored in the computer-readable storage medium, specifically, temporary and permanent copies of the instructions. The instructions may include: instructions that, when executed by at least one of the processors, cause the electronic device 600 to implement the fan power supply method shown in Figure 2. When the instructions are executed on the computer, the computer executes the method disclosed in any of the above embodiments or combined embodiments to control the power supply of the first fan 21 and the second fan 31.

[0095] In one embodiment, the coprocessor 602 is a special-purpose processor, such as, for example, a high-throughput MIC (Many Integrated Core) processor, a network or communication processor, a compression engine, a graphics processor, a GPGPU (General-purpose computing on graphics processing units), or an embedded processor. The optional nature of the coprocessor 602 is indicated by a dashed line in FIG. Figure 4 middle.

[0096] In one embodiment, the electronic device 600 may further include a network interface (NIC, Network Interface Controller) 606. The network interface 606 may include a transceiver for providing a radio interface for the electronic device 600, and then communicating with any other suitable device (such as a front-end module, an antenna, etc.). In various embodiments, the network interface 606 may be integrated with other components of the electronic device 600. The network interface 606 may implement the functions of the communication unit in the above-mentioned embodiments.

[0097] The electronic device 600 may further include an input / output (I / O) device 605. The I / O 605 may include: a user interface designed to enable a user to interact with the electronic device 600; a peripheral component interface designed to enable peripheral components to interact with the electronic device 600; and / or a sensor designed to determine environmental conditions and / or position signals related to the electronic device 600.

[0098] It is worth noting that Figure 4 This is for illustrative purposes only. Figure 4It is shown that the electronic device 600 includes multiple devices such as a processor 601, a controller hub 603, a memory 604, etc.; however, in actual applications, the device using the methods of the present application may include only a portion of the devices in the electronic device 600, for example, it may include only the processor 601 and the network interface 606. Figure 4 The properties of optional devices are shown with dashed lines.

[0099] Reference now Figure 5 , which is a block diagram of a SoC (System on Chip) 700 according to an embodiment of the present application. Figure 5 In the , similar components have the same reference numerals. In addition, the dashed boxes are optional features of more advanced SoCs. Figure 5 In the embodiment, the SoC includes: an interconnect unit 750, which is coupled to a processor 710; a system agent unit 780; a bus controller unit 790; an integrated memory controller unit 740; a group or one or more coprocessors 720, which may include integrated graphics logic, an image processor, an audio processor, and a video processor; a static random access memory (SRAM) unit 730; and a direct memory access (DMA) unit 760. In one embodiment, the coprocessor 720 includes a special-purpose processor, such as, for example, a network or communication processor, a compression engine, a GPGPU (General-purpose computing on graphics processing units), a high-throughput MIC processor, or an embedded processor.

[0100] The static random access memory (SRAM) unit 730 may include one or more tangible, non-transitory computer-readable media for storing data and / or instructions. The computer-readable storage medium stores instructions, specifically, temporary and permanent copies of the instructions. The instructions may include instructions that, when executed by at least one of the processors, cause the SoC to implement the fan power supply method shown in FIG2. When the instructions are executed on a computer, the computer performs the method disclosed in the above embodiments.

[0101] The embodiments of the present application also provide a computer program product for implementing the fan power supply methods provided in the above embodiments.

[0102] The various embodiments of the mechanism disclosed in the present application can be implemented in hardware, software, firmware or a combination of these implementation methods. The embodiments of the present application can be implemented as a computer program module or module code executed on a programmable system, and the programmable system includes at least one processor, a storage system (including volatile and non-volatile memory and / or storage elements), at least one input device and at least one output device.

[0103] A computer program module or module code may be applied to input instructions to perform the functions described herein and generate output signals. The output signals may be applied to one or more output devices in a known manner. For purposes of this application, a processing system includes any system having a processor such as, for example, a digital signal processor (DSP), a microcontroller, an application specific integrated circuit (ASIC), or a microprocessor.

[0104] Module code can be implemented with high-level modular language or object-oriented programming language to communicate with the processing system. When necessary, module code can also be implemented with assembly language or machine language. In fact, the mechanism described in this application is not limited to the scope of any specific programming language. In either case, the language can be a compiled language or an interpreted language.

[0105] In some cases, the disclosed embodiments may be implemented in hardware, firmware, software, or any combination thereof. The disclosed embodiments may also be implemented as instructions carried or stored on one or more temporary or non-temporary machine-readable (e.g., computer-readable) storage media, which may be read and executed by one or more processors. For example, instructions may be distributed over a network or through other computer-readable media. Therefore, a machine-readable medium may include any mechanism for storing or transmitting a signal in a machine (e.g., computer) readable form, including, but not limited to, a floppy disk, an optical disk, an optical disk, a magneto-optical disk, a read-only memory (ROM), a random access memory (RAM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic card or an optical card, a flash memory, or a tangible machine-readable memory for transmitting a signal (e.g., a carrier wave, an infrared signal, a digital signal, etc.) using the Internet in an electrical, optical, acoustic, or other form of propagation signal. Accordingly, machine-readable media include any type of machine-readable media suitable for storing or transmitting electronic instructions or signals in a form readable by a machine (eg, a computer).

[0106] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A fan power supply method, characterized in that: Applied to an energy storage system, the energy storage system includes a battery pack and an energy storage electrical component, a first fan provided in the battery pack is connected to a power grid side through a first switch and to the battery pack through a second switch, and a second fan provided in the energy storage electrical component is connected to the power grid side through a third switch, and the method includes: Obtaining the temperature of the battery pack; Determine that the temperature value of the battery pack is greater than or equal to a first preset temperature value, close the first switch and open the second switch, determine that the first switch is normally closed, and the power grid side supplies power to the first fan; Obtaining the temperature of the energy storage electrical component; Determine that the temperature value of the energy storage electrical component is greater than or equal to a second preset temperature value, close the third switch, and the grid side supplies power to the second fan.

2. The fan power supply method according to claim 1, characterized in that: The method further comprises: It is determined that the first switch is not closed normally, the second switch is closed, and the battery pack supplies power to the first fan.

3. The fan power supply method according to claim 1, characterized in that: The method further comprises: Determine that the temperature value of the battery pack is less than a first preset temperature value, and disconnect the first switch and the second switch.

4. The fan power supply method according to claim 1, characterized in that: The method further comprises: Determine that the temperature value of the energy storage electrical component is less than a second preset temperature value, and disconnect the third switch.

5. The fan power supply method according to claim 1, characterized in that: Determining that the first switch is normally closed includes: A first signal fed back by the first switch is obtained to determine that the first switch is normally closed; wherein: The first signal includes: a closing signal of the first switch and an output voltage of the first switch, and the output voltage is equal to an operating voltage of the first fan.

6. The fan power supply method according to claim 2, characterized in that: The determining that the first switch is not normally closed includes: A second signal fed back by the first switch is obtained to determine that the first switch is not closed normally; wherein: The second signal includes: a disconnection signal of the first switch and / or an output voltage of the first switch, and the output voltage is less than an operating voltage of the first fan.

7. An energy storage system, characterized in that: include: First switch; Second switch; The third switch; A battery pack having a first temperature sensor; A first fan is provided in the battery pack, the first fan is connected to the grid side through the first switch, and the first fan is connected to the battery pack through the second switch; an energy storage electrical component having a second temperature sensor; A second fan, provided in the energy storage electrical component, the second fan being connected to the grid side via the third switch; A controller is connected to the first temperature sensor, the first switch, the second switch, the second temperature sensor and the third switch respectively, and the controller is used to execute the fan power supply method according to any one of claims 1 to 6.

8. The energy storage system according to claim 7, characterized in that: It also includes a switch control board, and the controller is connected to the first switch, the second switch and the third switch respectively through the switch control board; When the temperature value of the battery pack is greater than or equal to a first preset temperature value, the switch control board is used to send a closed switch control signal to the first switch, send an open switch control signal to the second switch, and feed back a first signal of the first switch to the controller; When the temperature value of the energy storage electrical component is greater than or equal to a second preset temperature value, the switch control board is used to send a closed switch control signal to the third switch.

9. A computer storage medium, characterized in that: The method comprises a memory and a processor, wherein the memory is suitable for storing computer instructions, and the processor is suitable for executing the fan power supply method according to any one of claims 1 to 6 when running the computer instructions.

10. A computer program product, characterized in that The invention comprises a computer program / instruction, which implements the fan power supply method according to any one of claims 1 to 6 when executed by a processor.

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