Exhaust fan control circuit, exhaust fan apparatus and battery system

Abstract

Provided in the present application are an exhaust fan control circuit, an exhaust fan apparatus and a battery system. The exhaust fan control circuit comprises a first connection end, a second connection end, and a first control branch and a second control branch that are disposed in parallel, wherein the first connection end is configured to be electrically connected to a power supply of an exhaust fan, the second connection end is configured to be electrically connected to the exhaust fan, a local control switch is disposed in the first control branch, and a remote control switch is disposed in the second control branch.

Description

Exhaust fan control circuit and exhaust fan device, battery system

[0001] This application claims priority to Chinese Patent Application No. 202422962995.1, filed on December 2, 2024, entitled "Exhaust Fan Control Circuit and Exhaust Fan Device, Battery System", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to an exhaust fan control circuit and exhaust fan device, and a battery system. Background Technology

[0003] With the development of energy-saving and emission-reduction technologies, electric ships have been widely promoted and applied. Batteries, as the core component of electrochemical energy storage, have advantages such as ease of use, low environmental pollution, no geographical limitations, high conversion efficiency, and high energy and power density, and have been welcomed and recognized by the market. Batteries must possess high safety and reliability to ensure the normal operation of equipment and the safety of personnel.

[0004] In related technologies, exhaust fans are needed to ventilate the battery to ensure its normal operation. However, the operation of the exhaust fan is often manually controlled by the operator, which can easily lead to untimely start-up of the exhaust fan, posing a safety hazard to the battery and reducing its operational safety. Summary of the Invention

[0005] This application provides an exhaust fan control circuit, an exhaust fan device, and a battery system, which can start the exhaust fan in a timely manner to improve the safety of battery operation.

[0006] In a first aspect, this application provides an exhaust fan control circuit, which includes:

[0007] The first connection terminal is configured to electrically connect to the power supply of the exhaust fan;

[0008] The second connection terminal is configured for electrical connection to the exhaust fan;

[0009] The first control branch is electrically connected between the first connection terminal and the second connection terminal. A local control switch is provided in the first control branch, and the local control switch is configured to control the on and off of the first control branch.

[0010] The second control branch is connected in parallel with the first control branch. The second control branch is equipped with a remote control switch, which is used to control the on / off state of the second control branch.

[0011] Secondly, this application provides an exhaust fan device, which includes an exhaust fan and the aforementioned exhaust fan control circuit.

[0012] Thirdly, this application provides a battery system, which includes a battery and the aforementioned exhaust fan device.

[0013] The beneficial effects of this application are:

[0014] In this application, by setting up an exhaust fan control circuit between the exhaust fan power supply and the exhaust fan, and setting up a first control branch and a second control branch in parallel in the exhaust fan control circuit, a local control switch is set up in the first control branch and a remote control switch is set up in the second control branch, so that the exhaust fan can be started by at least one of the local control and remote control methods, thereby making the exhaust fan start up more timely and improving the safety of battery operation. Attached Figure Description

[0015] Figure 1 is a schematic diagram of a fan control circuit provided in some implementations of this application;

[0016] Figure 2 is a structural schematic diagram of an exhaust fan device provided in some implementations of this application;

[0017] Figure 3 is another structural schematic diagram of the exhaust fan device provided in some implementations of this application;

[0018] Figure 4 is a structural schematic diagram of a battery system provided in some implementations of this application;

[0019] Figure 5 is another structural schematic diagram of the battery system provided in some implementations of this application.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100. Exhaust fan control circuit; 101. First connection terminal; 102. Second connection terminal; 103. Local control switch; 104. Remote control switch; 105. Power supply stop switch; 106. Control mode switching switch; 107. First power supply start switch; 108. Relay; 109. Second power supply start switch; 200. Power supply; 201. First power supply; 202. Second power supply; 300. Exhaust fan; 301. Blade; 302. Motor; 400. Exhaust fan assembly; 500. Battery system; 600. Battery; 700. Exhaust duct; 800. Battery compartment. Embodiments of the present invention

[0022] To improve battery safety during operation, this application provides a fan control circuit, a fan device, and a battery system in several possible implementations. By setting up a fan control circuit between the fan's power supply and the fan itself, and including a first control branch and a second control branch connected in parallel within this circuit, the first control branch includes a local control switch, and the second control branch includes a remote control switch. This allows the fan to be started using at least one of local or remote control methods, resulting in more timely fan startup and improved battery safety during operation. Please refer to the detailed description for specific solutions.

[0023] Referring to Figure 1, the exhaust fan control circuit 100 provided in some possible implementations of this application includes a first connection terminal 101, a second connection terminal 102, a first control branch, and a second control branch. The first connection terminal 101 is configured to be electrically connected to the power supply 200 of the exhaust fan 300; the second connection terminal 102 is configured to be electrically connected to the exhaust fan 300.

[0024] The first control branch is electrically connected between the first connection terminal 101 and the second connection terminal 102. The second control branch is connected in parallel with the first control branch, that is, the second control branch is also electrically connected between the first connection terminal 101 and the second connection terminal 102. In this way, when either the first control branch or the second control branch is turned on, the power supply 200 can supply power to the exhaust fan 300, thereby turning on the exhaust fan 300.

[0025] A local control switch 103 is provided in the first control branch, and the local control switch 103 is configured to control the on / off state of the first control branch. Specifically, the local control switch 103 has an open state and a closed state, and the switching between the open state and the closed state is locally controlled by the exhaust fan control circuit 100. For example, the local operator of the exhaust fan control circuit 100 can manually control the local control switch 103 to switch the local control switch 103 between the open state and the closed state.

[0026] A remote control switch 104 is provided in the second control branch, and the remote control switch 104 is configured to control the on / off state of the second control branch. Specifically, the remote control switch 104 has an open state and a closed state, and the switching between the open state and the closed state is remotely controlled by a remote device of the exhaust fan control circuit 100. The remote device may be, for example, a battery management system (BMS). In this way, the battery management system can send a preset dry contact signal to the remote control switch 104 when it detects at least one of the following preset signals, so that the remote control switch 104 switches from the open state to the closed state, thereby realizing the intelligent start of the exhaust fan 300. Preset signals can be, for example, battery charging signals, overheating signals (including overheating of ambient temperature, overheating of battery cell temperature, etc.), overheating of gas concentration signals (including overheating of CH hydrocarbon gas concentration, overheating of CO carbon monoxide content, and underheating of O2 oxygen content, etc.), pressure signals (including overheating of pressure in the battery compartment 800 where battery 600 is located in Figure 4 or Figure 5, etc.), and battery thermal runaway signals. This allows the exhaust fan 300 to adapt to changes in the environment, such as changes in temperature, pressure, and gas composition, thus protecting the safety of personnel entering the battery compartment 800 for maintenance.

[0027] Furthermore, the end of the remote control switch 104 connected to the second connection terminal 102 can also be electrically connected to the alarm module. Thus, when the remote control switch 104 switches from the open state to the closed state, the power supply 200 can still supply power to the alarm module, enabling the alarm module to output alarm notification information, thereby realizing alarm notification triggered by a remote device. The alarm notification information can be preset notification information, battery ambient temperature information, cell temperature information, gas concentration information and pressure information of the battery compartment 800, etc.

[0028] In some possible implementations of this application, referring to Figure 1, the exhaust fan control circuit 100 further includes a power supply stop switch 105. The first control branch is electrically connected to the first connection terminal 101 through the power supply stop switch 105, and the power supply stop switch 105 includes an open state and a closed state. Thus, by switching the power supply stop switch 105 from the closed state to the open state, the power supply 200 to the exhaust fan 300 through the first control branch and the second control branch can be disconnected. The power supply stop switch 105 can be a manually controlled switch; for example, the local operator of the exhaust fan control circuit 100 can manually control the power supply stop switch 105 to switch it from the closed state to the open state.

[0029] In some possible implementations of this application, the power supply stop switch 105 may not be located between the first control branch and the first connection terminal 101, but rather between the first control branch and the second connection terminal 102. That is, the first control branch is electrically connected to the second connection terminal 102 via the power supply stop switch 105. In this way, the power supply stop switch 105 can also be used to disconnect the power supply 200 from supplying power to the exhaust fan 300 through the first control branch and the second control branch.

[0030] In some possible implementations of this application, referring to Figure 1, the first control branch is further provided with a control mode switching switch 106. The local control switch 103 is electrically connected to the first connection terminal 101 through the control mode switching switch 106, and the control mode switching switch 106 includes an open state and a closed state. Thus, by switching the control mode switching switch 106 between the open state and the closed state, the local control mode and the "local + remote" control mode of the exhaust fan 300 can be switched. For example, when the control mode switching switch 106 is in the open state, the exhaust fan 300 can be controlled to turn on through the remote control switch 104, while when the control mode switching switch 106 is in the closed state, both the local control switch 103 and the remote control switch 104 can be set to control the exhaust fan 300 to turn on.

[0031] In some possible implementations of this application, the control mode switching switch 106 may not be located between the local control switch 103 and the first connection terminal 101, but rather between the local control switch 103 and the second connection terminal 102. That is, the local control switch 103 is electrically connected to the second connection terminal 102 through the control mode switching switch 106. In this way, the control mode switching switch 106 can also be used to switch between the local control mode and the "local + remote" control mode of the exhaust fan 300.

[0032] In some possible implementations of this application, referring to Figure 1, since the power supply current of the exhaust fan 300 is usually large, a relay 108 can be used to close the power supply line of the exhaust fan 300 to ensure safety when the exhaust fan 300 is turned on. Specifically, the exhaust fan control circuit 100 also includes a first power supply start switch 107. The first control branch is electrically connected to the second connection terminal 102 through the first power supply start switch 107. The first control branch is also equipped with a relay 108. The connection terminal of the first control branch electrically connected to the first power supply start switch 107 is also electrically connected to the relay 108. The relay 108 is configured to close the first power supply start switch 107 when energized. In this way, when the local control switch 103 is closed, the first control branch can conduct to the relay 108, so that the relay 108 is energized, which in turn causes the first power supply start switch 107 to close as well. The power supply 200 can then supply power to the exhaust fan 300 through the first control branch and the closed first power supply start switch 107 in sequence to turn on the exhaust fan 300. It can be seen that when the local control switch 103 is closed, the small current generated is the same as when the relay 108 is energized, thus avoiding the large current generated when the first power supply start switch 107 is closed, in order to ensure the safety of the operator when closing the local control switch 103.

[0033] Furthermore, since the second control branch is connected in parallel with the first control branch, when the remote control switch 104 is closed, the second control branch will also be connected to the relay 108, so that the relay 108 is energized, which in turn causes the first power supply start switch 107 to also close. The power supply 200 can then supply power to the exhaust fan 300 through the second control branch and the closed first power supply start switch 107 in sequence to turn on the exhaust fan 300.

[0034] In some possible implementations of this application, the local control switch 103 is a push-to-return switch. That is, after pressing the local control switch 103, the local control switch 103 is in a closed state, and after releasing the local control switch 103, the local control switch 103 springs back and returns to the open state, so as to ensure the safety of the operator when closing the local control switch 103. For this purpose, referring to Figure 1, the local control switch 103 is also connected in parallel with a second power supply start switch 109. The relay 108 is also configured to close the second power supply start switch 109 when energized. In this way, after the local control switch 103 springs back and returns to the open state, the power supply 200 can supply power to the exhaust fan 300 through the second power supply start switch 109 and the first power supply start switch 107 in sequence to turn on the exhaust fan 300, avoiding the power supply being interrupted due to the springback of the local control switch 103.

[0035] In some possible implementations of this application, both the first power supply start switch 107 and the second power supply start switch 109 are normally open switches. Specifically, when the relay 108 is energized, the relay 108 can cause both the first power supply start switch 107 and the second power supply start switch 109 to be in a closed state. When the power supply stop switch 105 is opened, the relay 108 is de-energized, and at this time, both the first power supply start switch 107 and the second power supply start switch 109 return to the open state.

[0036] In some possible implementations of this application, the exhaust fan control circuit 100 may be housed in the control box of the exhaust fan to realize the commercialization of the exhaust fan control circuit 100.

[0037] In some possible implementations of this application, the starting method of the exhaust fan 300 based on the local control switch 103 is illustrated as an example. Specifically, when the exhaust fan 300 is not started, both the power supply stop switch 105 and the control mode switching switch 106 are in the closed state. The operator can press the local control switch 103 to manually close it as needed. At this time, the power supply 200 can supply power to the relay 108 through the closed local control switch 103. Under the action of the relay 108, both the first power supply start switch 107 and the second power supply start switch 109 are switched to the closed state. At this time, the power supply 200 can supply power to the exhaust fan 300 through the closed first power supply start switch 107 and the second power supply start switch 109. Since the local control switch 103 is a push-to-return switch, it returns to the open state after the operator stops pressing it. If the operator wants to turn off the exhaust fan 300, they can manually disconnect the power supply stop switch 105 to de-energize the relay 108 and the exhaust fan 300, and the first power supply start switch 107 and the second power supply start switch 109 will return to the open state. After the exhaust fan 300 is de-energized and turned off, the operator can manually close the power supply stop switch 105 to return it to the closed state.

[0038] In some possible implementations of this application, the starting method of the exhaust fan 300 based on the remote control switch 104 is illustrated as an example. Specifically, when the exhaust fan 300 is not started, the power supply stop switch 105 is in the closed state. The BMS can send a preset dry contact signal to the remote control switch 104 based on a preset exhaust fan start strategy, so that the remote control switch 104 switches from the open state to the closed state. At this time, the power supply 200 can supply power to the relay 108 through the closed remote control switch 104. Under the action of the relay 108, both the first power supply start switch 107 and the second power supply start switch 109 switch to the closed state. At this time, the power supply 200 can supply power to the exhaust fan 300 through the closed first power supply start switch 107 and the second power supply start switch 109, or through the closed remote control switch 104 and the first power supply start switch 107. If the operator wants to turn off the exhaust fan 300, they can manually disconnect the power supply stop switch 105 to de-energize the relay 108 and the exhaust fan 300, and restore the first power supply start switch 107 and the second power supply start switch 109 to the off state.

[0039] In some possible implementations of this application, referring to FIG2, the exhaust fan device 400 provided in some possible implementations of this application includes an exhaust fan 300 and an exhaust fan control circuit 100 in any possible implementation, wherein the exhaust fan control circuit 100 is configured to control the power supply to the exhaust fan 300.

[0040] In some possible implementations of this application, referring to Figure 3, the exhaust fan device 400 further includes a power supply 200 for the exhaust fan 300. The power supply 200 includes a first power supply 201 and a second power supply 202. The first connection terminal 101 of the exhaust fan control circuit 100 is electrically connected to the first power supply 201 and the second power supply 202, respectively. For example, the first power supply 201 can be the main power supply, and the second power supply 202 is an emergency power supply for the main power supply, thereby achieving redundant power supply for the exhaust fan 300. In this way, when one of the first power supply 201 and the second power supply 202 fails to supply power, the other of the first power supply 201 and the second power supply 202 can continuously supply power to the exhaust fan 300 to ensure the continuous and stable operation of the exhaust fan 300.

[0041] In some possible implementations of this application, referring to Figure 4 or Figure 5, the battery system 500 provided in some possible implementations of this application includes a battery 600 and an exhaust fan device 400 in any possible implementation, the exhaust fan device 400 being configured to exhaust air from the environment where the battery 600 is located.

[0042] In some possible implementations of this application, referring to Figure 4, the battery system 500 also includes an exhaust duct 700 for the battery 600, with an exhaust fan 300 disposed within the exhaust duct 700 to ventilate the environment surrounding the battery 600. Since the battery compartment 800 where the battery 600 is located is a high-risk area, and the battery 600 will release flammable gases in the event of thermal runaway, the exhaust fan 300 can be an explosion-proof exhaust fan to prevent the generation of static sparks or other hazardous factors that could cause an explosion during operation. In this case, the entire exhaust fan 300 (including the blades 301 and motor 302 shown in Figure 5) can be installed within the exhaust duct 700.

[0043] In some possible implementations of this application, referring to Figure 5, another installation method of the exhaust fan 300 is shown. The battery system 500 also includes an exhaust duct 700 for the battery 600, and the exhaust fan 300 is disposed in the exhaust duct 700 to facilitate ventilation of the environment where the battery 600 is located. Since the battery compartment 800 where the battery 600 is located is a high-risk area, and the battery 600 will release flammable gases when thermal runaway occurs, a portion of the exhaust fan 300 can be installed in the exhaust duct 700. Specifically, the exhaust fan 300 includes blades 301 and a motor 302. The blades 301 are disposed in the exhaust duct 700, and the blades 301 are non-sparking blades, such as plastic blades, to avoid the generation of static sparks or other dangerous factors that may cause an explosion when the blades 301 rotate. The motor 302 can be disposed in the external environment of the exhaust duct 700, thus reducing the requirements for the material and structure of the motor 302, thereby reducing the hardware cost of the exhaust fan 300.

Claims

1. An exhaust fan control circuit (100), the exhaust fan control circuit (100) comprising: The first connection terminal (101) is configured to electrically connect to the power supply (200) of the exhaust fan (300). The second connection end (102) is configured to electrically connect to the exhaust fan (300); The first control branch is electrically connected between the first connection terminal (101) and the second connection terminal (102). A local control switch (103) is provided in the first control branch, and the local control switch (103) is configured to control the on and off of the first control branch. The second control branch is connected in parallel with the first control branch. The second control branch is equipped with a remote control switch (104), which is configured to control the on / off state of the second control branch.

2. The exhaust fan control circuit (100) as described in claim 1, wherein, The exhaust fan control circuit (100) also includes a power supply stop switch (105), the first control branch is electrically connected to the first connection terminal (101) through the power supply stop switch (105), and the power supply stop switch (105) includes an open state and a closed state.

3. The exhaust fan control circuit (100) as described in claim 1, wherein, The first control branch is also provided with a control mode switching switch (106). The local control switch (103) is electrically connected to the first connection terminal (101) through the control mode switching switch (106). The control mode switching switch (106) includes an open state and a closed state.

4. The exhaust fan control circuit (100) as described in any one of claims 1 to 3, wherein, The exhaust fan control circuit (100) also includes a first power supply start switch (107), and the first control branch is electrically connected to the second connection terminal (102) through the first power supply start switch (107). The first control branch is also provided with a relay (108), and the connection terminal of the first control branch that is electrically connected to the first power supply start switch (107) is also electrically connected to the relay (108). The relay (108) is configured to make the first power supply start switch (107) closed when it is energized.

5. The exhaust fan control circuit (100) as described in claim 4, wherein, The local control switch (103) is a push-to-rebound switch. The local control switch (103) is also connected in parallel with a second power supply start switch (109). The relay (108) is also configured to close the second power supply start switch (109) when it is energized.

6. An exhaust fan device (400) comprising an exhaust fan (300) and an exhaust fan control circuit (100) according to any one of claims 1 to 5.

7. The exhaust fan device (400) as described in claim 6, wherein, The exhaust fan device (400) also includes a power supply (200) for the exhaust fan (300), the power supply (200) includes a first power supply (201) and a second power supply (202), and the first connection terminal (101) of the exhaust fan control circuit (100) is electrically connected to the first power supply (201) and the second power supply (202) respectively.

8. A battery system (500) comprising a battery (600) and an exhaust fan device (400) according to any one of claims 6 to 7.

9. The battery system (500) as claimed in claim 8, wherein the battery system (500) further includes an exhaust duct (700) for the battery (600), the exhaust fan (300) is disposed in the exhaust duct (700), and the exhaust fan (300) is an explosion-proof exhaust fan.

10. The battery system (500) of claim 8, wherein the battery system (500) further includes an exhaust duct (700) for the battery (600), the exhaust fan (300) includes blades (301) and a motor (302), the blades (301) are disposed in the exhaust duct (700), and the blades (301) are sparkless blades, and the motor (302) is disposed in the external environment of the exhaust duct (700).

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