Power supply device

Abstract

The utility model relates to the technical field of electric energy storage, and provides a power supply device which comprises a box body, a pressure release valve, a battery, a control assembly, a voltage stabilization capacitor and a forced start switch. A cavity is formed in the box body, and a pressure relief hole communicated with the cavity is formed in the box body. The pressure relief valve is at least partially installed in the pressure relief hole and connected with the box body. The battery is arranged in the cavity. The control assembly is arranged in the cavity adjacent to the battery and is electrically connected with the battery. And the voltage stabilizing capacitor is arranged in the cavity adjacent to the battery and is electrically connected with the battery. The forced start switch is installed on the box body and electrically connected with the control assembly. The pressure relief valve is adopted to control the pressure relief hole to be opened to release pressure, so that the stability of the pressure in the box body can be reliably maintained; moreover, the voltage between the positive electrode and the negative electrode of the battery is limited by adopting the voltage-stabilizing capacitor, the voltage stability is maintained, and the reliability and the safety of the battery are improved; and meanwhile, the battery in the under-voltage state is controlled to supply power by adopting the forced start switch, so that the requirement of emergency use can be met.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, specifically to a power supply device. Background Technology

[0002] A power supply device is a device that supplies power to a load using batteries that store electrical energy. Currently, there are various types of power supply devices on the market, with a wide range of applications. Some power supply devices designed for high-power loads typically have battery modules installed inside a casing. These devices may experience problems such as excessive casing pressure and sudden current surges due to load instability during use, posing significant safety hazards and indicating insufficient safety. Furthermore, when the battery is low, these devices often enter an undervoltage state and cannot supply power normally, requiring recharging before normal operation, thus failing to meet emergency use needs. Utility Model Content

[0003] In view of this, the present invention provides a power supply device to solve the problems of insufficient safety and inability to meet emergency use requirements of existing power supply devices.

[0004] To solve the above problems, the technical solution of this utility model is implemented as follows:

[0005] A power supply device includes: a housing with an internal cavity, the housing having a pressure relief hole communicating with the cavity; a pressure relief valve, at least partially installed in the pressure relief hole and connected to the housing; a battery disposed within the cavity; a control component disposed adjacent to the battery within the cavity and electrically connected to the battery; a voltage stabilizing capacitor for limiting the voltage between the positive and negative terminals of the battery, the voltage stabilizing capacitor being disposed adjacent to the battery within the cavity and electrically connected to the battery; and a forced-start switch mounted on the housing and electrically connected to the control component, the forced-start switch being used to control the battery to supply power to a load in an undervoltage state.

[0006] In some embodiments, the housing includes: a body, which is hollow inside to form the cavity, and an opening communicating with the cavity; a cover plate, which covers the opening and is connected to the body; and a sealing element, which is disposed between the body and the cover plate; wherein the pressure relief hole is opened on the cover plate, and the pressure relief valve is connected to the cover plate.

[0007] In some embodiments, the body has a first flange formed along the edge of the opening, the cover plate has a corresponding second flange, and the sealing element is disposed between the first flange and the second flange; wherein the first flange and the second flange are connected by a fastener, and the fastener passes through at least the first flange and the second flange.

[0008] In some embodiments, the first flange has a first connecting hole, the sealing member has a second connecting hole, and the second flange has a third connecting hole; wherein the fixing member is sequentially inserted into the first connecting hole, the second connecting hole, and the third connecting hole.

[0009] In some embodiments, the cover plate has a mounting hole; wherein the forced start switch is mounted on the cover plate and passes through the mounting hole.

[0010] In some embodiments, the power supply device further includes a wireless communication component for transmitting battery status information to a terminal device, the wireless communication component being electrically connected to the control component.

[0011] In some embodiments, the wireless communication component is disposed on the side wall of the body.

[0012] In some embodiments, the surface of the body and / or the cover plate is provided with a protective coating.

[0013] In some embodiments, the power supply device further includes a handle for gripping when moving the power supply device, the handle being disposed on the body and / or the cover plate.

[0014] In some embodiments, the power supply device further includes a first conductive element and a second conductive element respectively disposed on the cover plate, wherein the first conductive element is electrically connected to the positive terminal of the battery and the second conductive element is electrically connected to the negative terminal of the battery.

[0015] The power supply device provided in this embodiment includes a housing, a pressure relief valve, a battery, a control component, a voltage stabilizing capacitor, and a forced-start switch. The housing has a pressure relief hole communicating with an internal cavity, and the pressure relief valve is at least partially installed within this hole. When the pressure in the housing increases, the pressure relief valve opens to release the pressure, thus reliably maintaining the pressure balance and stability within the housing. Simultaneously, by using a voltage stabilizing capacitor adjacent to and electrically connected to the battery, the capacitor limits the voltage between the positive and negative terminals of the battery, effectively preventing damage to the battery caused by unstable current fluctuations in the circuit, and improving battery reliability. Furthermore, by incorporating a forced-start switch electrically connected to the control component, when the battery is low on power and enters an undervoltage state, the forced-start switch can forcibly activate battery power for emergency use. Therefore, the power supply device provided in this embodiment has good safety performance, providing reliable protection for the safe use of the power supply device, and can also meet the needs of emergency use when the battery power is low, offering comprehensive functionality and good safety. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the power supply device provided in an embodiment of the present utility model;

[0017] Figure 2 This is an exploded view of the power supply device provided in an embodiment of this utility model;

[0018] Figure 3 This is a left view of the power supply device provided in an embodiment of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Power supply device; 11. Housing; 111. Cavity; 112. Pressure relief hole; 113. Body; 1131. First flange; 1132. Third connection hole; 114. Cover plate; 1141. Second flange; 1142. First connection hole; 115. Sealing element; 1151. Second connection hole; 116. Mounting hole; 12. Pressure relief valve; 13. Voltage stabilizing capacitor; 14. Forced start switch; 15. Fixing element; 16. Wireless communication component; 17. Handle; 18. First conductive element; 19. Second conductive element. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this utility model will not be described separately.

[0023] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0024] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0025] like Figure 1 As shown, this embodiment of the present invention provides a power supply device 1, which can be used to supply power to high-power loads. For example, in a vehicle scenario, the power supply device 1 can be used to power a parking air conditioner. In addition, the power supply device 1 can also be used to power heating devices such as kettles. Of course, depending on different design schemes, the power supply device 1 can adapt to loads of different power, and its application scenarios are quite wide. This embodiment of the present invention does not impose further limitations on the application scenarios of the power supply device 1, as long as it can meet the power demand of the load.

[0026] Specifically, such as Figure 2 As shown, the power supply device 1 includes a housing 11, a pressure relief valve 12, a battery (not shown), a control component (not shown), a voltage regulator capacitor 13, and a forced start switch 14. The housing 11 has an internal cavity 111, and a pressure relief hole 112 communicating with the cavity 111 is provided on the housing 11. The pressure relief valve 12 is at least partially installed in the pressure relief hole 112 and connected to the housing 11. The battery is disposed within the cavity 111 and is used to supply power to the load. The control component is disposed adjacent to the battery within the cavity 111 and is electrically connected to the battery to control the battery's operating state. The voltage regulator capacitor 13 is disposed adjacent to the battery within the cavity 111 and is electrically connected to the battery to limit the voltage between the positive and negative terminals of the battery. The forced start switch 14 is mounted on the housing 11 and is electrically connected to the control component.

[0027] Optionally, the battery in the power supply device 1 can be flexibly designed according to different usage requirements, as long as it can meet the power demand of the load. For example, from the perspective of electrode material, lithium iron phosphate batteries can be used as the positive electrode material; from the perspective of shape, cylindrical, square, or other shapes of batteries can be used; from the perspective of quantity, only one battery can be set, or multiple batteries can be set in combination. Specifically, the control component usually refers to a circuit module equipped with a BMS (Battery Management System). When the control component is electrically connected to the battery, the components in the circuit module can monitor and manage the working state of the battery, prevent the battery from overcharging and discharging, and thus provide basic protection for the battery's operation. In this embodiment of the utility model, both the battery and the control component can be designed with reference to relevant technologies, which will not be elaborated here.

[0028] Specifically, when the power supply device 1 is working, the battery installed in the cavity 111 is connected to the load for power supply. As the usage time increases, the battery generates heat, which leads to an increase in the temperature and pressure inside the housing 11. In addition, excessively high ambient temperature, improper operation, or external impacts on the housing 11 may also cause an increase in the internal pressure of the housing 11. When the pressure is too high, the housing 11 may deform abnormally, or even explode. To prevent excessive pressure inside the housing 11, this embodiment of the invention uses a pressure relief hole 112 on the housing 11, and a pressure relief valve 12 is at least partially installed in the pressure relief hole 112. In this way, when the valve of the pressure relief valve 12 is opened, the pressure inside the housing 11 can be released through the pressure relief hole 112. The pressure relief valve 12 can usually automatically open when the internal pressure of the housing 11 exceeds a preset pressure threshold without manual operation, thereby releasing pressure in a timely manner and maintaining the internal pressure of the housing 11 within a safe range, which can also better protect the safety of personnel. During the design process, the pressure threshold for opening the pressure relief valve 12 can usually be determined based on factors such as the size of the housing 11, the capacity of the battery, and the safety requirements of the application scenario, and then a pressure relief valve 12 with compatible specifications can be selected.

[0029] In some implementation schemes, the pressure relief valve 12 installed in the pressure relief hole 112 can also be manually operated to relieve pressure. When pressure relief is needed, the pressure relief valve 12 can be removed from the pressure relief hole 112; after pressure relief is complete, the pressure relief valve 12 can be reinstalled in the pressure relief hole 112. When manual pressure relief is used, a pressure detector can be installed to detect the pressure value inside the chamber 11 and generate a reminder such as an audible or signal indication when pressure relief is needed, thereby achieving safe control of the internal pressure of the chamber 11.

[0030] Specifically, the voltage regulator capacitor 13 achieves voltage stabilization through its inherent characteristics. When the battery is connected to a load, the load may be unstable, generating a surge current with significant fluctuations. In this case, the voltage regulator capacitor 13 acts as a high-rate cell, absorbing this surge current and ensuring only a small portion of the current flows through the battery, preventing damage or overheating. As the load stabilizes, the voltage regulator capacitor 13 slowly releases the absorbed energy. Through this process, the voltage regulator capacitor 13 reliably maintains a stable voltage between the battery's positive and negative terminals, ensuring the battery's safety and stability during power supply. Furthermore, the battery protection scheme using the voltage regulator capacitor 13 is structurally simple; simply connecting the capacitor to the battery correctly eliminates the need for complex circuit connections with multiple components, simplifying assembly and improving efficiency.

[0031] It should be noted that in this embodiment of the invention, the control component and the voltage regulator 13 are respectively arranged adjacent to the battery within the cavity 111. "Adjacent to the battery" means that the control component and the voltage regulator 13 are close to the battery or have parts that are in contact with each other. This arrangement results in a more compact circuit structure, saves space, and facilitates electrical connections between the various circuit components. Of course, it is understood that the control component and the voltage regulator 13 do not necessarily need to be tightly fitted to the battery; they can be spaced at a certain distance, as long as a reliable electrical connection is achieved.

[0032] Specifically, when the battery power is low, the battery output voltage will be lower than the output voltage when the battery is at normal power level, meaning the battery is in an undervoltage state. During normal operation, the control component needs to monitor and manage the battery's operating status to prevent overcharging and over-discharging, thereby reducing battery damage and extending battery life. Therefore, when the battery is in an undervoltage state, the control component will stop the battery from supplying power according to a preset control strategy. At this time, without a forced start switch 14, the battery must be charged to a certain level before normal use, which would be inconvenient for users in emergency situations. By using a forced start switch 14 electrically connected to the control component, and by setting a corresponding identification module on the control component, when the control component detects that the forced start switch 14 has been triggered, it can adjust or disable the preset control strategy, stopping the intervention on battery discharge and allowing the battery to still supply power to the load even in an undervoltage state. Therefore, the forced start switch 14 can forcibly turn on the battery to supply power. In situations where power is urgently needed, users can choose to trigger the forced start switch 14 to meet emergency usage requirements.

[0033] The power supply device 1 provided in this embodiment includes a housing 11, a pressure relief valve 12, a battery, a control component, a voltage stabilizing capacitor 13, and a forced start switch 14. By providing a pressure relief hole 112 on the housing 11 and at least partially installing the pressure relief valve 12 within it, the pressure relief valve 12 can promptly open to release pressure when the internal pressure of the housing 11 is too high, maintaining the stability of the internal pressure and reliably preventing the housing 11 from expanding, deforming, or even exploding. Simultaneously, by placing the voltage stabilizing capacitor 13 adjacent to and electrically connected to the battery, the voltage stabilizing capacitor 13 can absorb most of the current surge when there are current fluctuations in the circuit, thereby limiting the voltage between the positive and negative terminals of the battery within a safe range, providing reliable protection for battery safety, and resulting in a relatively simple and compact circuit structure. Through this design, the combined protective effects of the pressure relief valve 12 and the voltage stabilizing capacitor 13 form multiple layers of safety protection, significantly improving the reliability of the power supply device 1 and resulting in a high level of safety in its use. In addition, by setting the forced start switch 14 to be electrically connected to the control component, when the battery is in an undervoltage state, the forced start switch 14 can be triggered as needed, so that the battery can still supply power to the load in the undervoltage state, thereby meeting the needs of emergency use when the battery power is insufficient.

[0034] In some embodiments, such as Figure 2 As shown, the housing 11 includes a body 113, a cover plate 114, and a sealing element 115. The body 113 is hollow, forming a cavity 111, and has an opening communicating with the cavity 111. Components such as the battery, control components, and voltage regulator capacitor 13 can be placed into the cavity 111 through this opening. The cover plate 114 covers the opening and is connected to the body 113. The sealing element 115 is located between the body 113 and the cover plate 114. A pressure relief hole 112 is located on the cover plate 114, and a pressure relief valve 12 is connected to the cover plate 114.

[0035] Specifically, the sealing element 115 is used to seal the gap at the connection between the body 113 and the cover plate 114. It is typically made of an elastic material. When the cover plate 114 is fixed to the body 113, the sealing element 115 is compressed by the combined pressure of the body 113 and the cover plate 114, and upon rebound, it maintains a tight fit with both the body 113 and the cover plate 114, thus achieving a reliable seal. In some embodiments, the sealing element 115 can also be made of waterproof materials such as silicone, thus ensuring the waterproof performance of the enclosure 11 while achieving a seal.

[0036] Regarding the installation method of the seal 115, optionally, the seal 115 can be first connected to the body 113, and when the cover plate 114 is connected to the body 113, the seal 115 then fits against the cover plate 114 to achieve a seal; of course, the seal 115 can also be first connected to the cover plate 114, or it can be connected to both the cover plate 114 and the body 113 simultaneously, for example, by double-sided bonding, fixing the seal 115 to both the cover plate 114 and the body 113 respectively when the cover plate 114 is connected to the body 113. In some embodiments, a positioning groove for accommodating the seal 115 can also be provided at the connection between the cover plate 114 and the body 113. Installing the seal 115 in the positioning groove can better ensure the stability of the installation position of the seal 115, making it less prone to misalignment and improving the reliability of the seal.

[0037] In the above embodiment, the pressure relief hole 112 is located on the cover plate 114, and the pressure relief valve 12 is connected to the cover plate 114. With this design, the pressure relief valve 12 is located at the top of the housing 11, making efficient use of the space in the cover plate 114, resulting in a more compact structural arrangement. Of course, the pressure relief hole 112 can also be located on the main body 113, and the pressure relief valve 12 can be connected to the main body 113; the specific design can be tailored to different usage requirements.

[0038] In some embodiments, such as Figure 2 As shown, the body 113 has a first flange 1131 formed along the edge of the opening, and the cover plate 114 has a corresponding second flange 1141. A sealing element 115 is disposed between the first flange 1131 and the second flange 1141. The first flange 1131 and the second flange 1141 are connected by a fastener 15, which passes through at least both flanges. Specifically, the fastener 15 is used to connect and fix the cover plate 114 and the body 113, and can typically be a screw, rivet, or other fastener. For example, in some embodiments, when the fastener 15 is a screw, a through hole can be formed in the first flange 1131, and a threaded hole coaxial with the through hole can be formed in the second flange 1141, allowing the fastener 15 to pass through the through hole from top to bottom and connect with the threaded hole via a thread.

[0039] In some embodiments, the fastener 15 may also pass through the seal 115 while passing through the first flange 1131 and the second flange 1141. Specifically, as shown in... Figure 2As shown, a first connecting hole 1142 can be formed on the second flange 1141, a second connecting hole 1151 can be formed on the seal 115, and a third connecting hole 1132 can be formed on the first flange 1131. The fixing member 15 is sequentially inserted into the first connecting hole 1142, the second connecting hole 1151, and the third connecting hole 1132. This design can fix the seal 115 while fixing the cover plate 114 and the body 113, improving the reliability of the seal 115, and eliminating the need for other methods to fix the seal 115, making the assembly operation simpler.

[0040] Optionally, the forced start switch 14 can be mounted on the cover plate 114 or on the main body 113, as long as it can enable the battery to supply power to the load when triggered. For example, in some embodiments, the cover plate 114 has a mounting hole 116, and the forced start switch 14 passes through the mounting hole 116, thereby mounting the forced start switch 14 on the cover plate 114. It is understood that when the power supply device 1 is in use, if the user can more easily reach the top of the enclosure 11, the forced start switch 14 can be mounted on the cover plate 114 for user operation. Similarly, if the user can more easily reach the side of the enclosure 11, the forced start switch 14 can be mounted on the main body 113.

[0041] In some embodiments, such as Figure 1 and Figure 2 As shown, the power supply device 1 also includes a wireless communication component 16. The wireless communication component 16 is used at least to transmit battery status information to a terminal device, and is electrically connected to the control component. Specifically, the wireless communication component 16 utilizes wireless communication technology to interact with user terminal devices such as mobile phones and computers. This allows users to view the usage status of the power supply device 1 through their terminal devices, such as the remaining battery power and the number of charge / discharge cycles. In some embodiments, the wireless communication component 16 can also be used for remote control of the power supply device 1 by the terminal device. This allows users to control the power supply device 1 through specific software on the terminal device. For example, they can control the power supply device 1 to turn on or off power, or, when the battery is in a low-voltage state, disable the protection strategy of the control component to allow the battery to supply power normally. The above embodiments, by setting the wireless communication component 16, can better achieve remote monitoring and operation of the power supply device 1, with a high degree of intelligence and more convenient operation.

[0042] Optionally, the wireless communication component 16 can be mounted on the cover 114 or on the main body 113, depending on the layout of other components. For example, in some embodiments, such as Figure 2As shown, the wireless communication component 16 is located on the side wall of the main body 113, so that it does not occupy the space of the cover plate 114. The pressure relief valve 12, the forced start switch 14 and other components can be installed on the cover plate 114, thereby making full use of the space of each part of the box 11 and the structure layout is compact.

[0043] In some implementations, a display screen can be installed on the main body 113 or the cover 114 to directly display data such as the battery level and the internal pressure value of the housing 11. Furthermore, the display screen can be set to a touch-sensitive type, allowing for control of battery depressurization or screen illumination via touch operation.

[0044] In some embodiments, a protective coating is provided on the surface of the body 113 and / or the cover plate 114. The protective coating is a protective material covering the surface of a structure, providing a certain level of protection and improving the durability of the structure. Some coatings also enhance aesthetics and hardness. For example, in some embodiments, both the body 113 and the cover plate 114 are made of SPCC (generally cold-rolled carbon steel sheet) or other metal materials. A protective coating can be formed on the surface of the body 113 and the cover plate 114 through powder coating, thereby effectively isolating them from air and improving their rust resistance. Of course, depending on different design schemes, a protective coating may be provided only on the body 113 or only on the cover plate 114. The protective coating may also be formed using other processes such as electroplating, and the specific design can be tailored to the required performance and cost factors.

[0045] In some embodiments, such as Figure 2 and Figure 3 As shown, the power supply device 1 also includes a handle 17 for a user to grip when moving the power supply device 1, the handle 17 being disposed on the body 113 and / or the cover plate 114. For example, in some embodiments, such as Figure 3 As shown, handles 17 can be located on opposite sides of the main body 113, and a traction rope can also be provided on the handles 17. When it is necessary to move the power supply device 1, the user can grasp the handles 17 on both sides with both hands or pull the traction rope on the handles 17 to lift and move the power supply device 1. In some other embodiments, handles 17 can also be located on the cover plate 114, and the user can lift the power supply device 1 by grasping the handles 17. Of course, handles 17 can also be located on both the main body 113 and the cover plate 114, so that the user can choose a suitable carrying method, which is more flexible in design. The above embodiments, by providing handles 17, can facilitate the carrying or transport of the power supply device 1 and improve portability.

[0046] In some embodiments, such as Figure 1 and Figure 2As shown, the power supply device 1 also includes a first conductive element 18 and a second conductive element 19 respectively disposed on the cover plate 114. The first conductive element 18 is electrically connected to the positive terminal of the battery, and the second conductive element 19 is electrically connected to the negative terminal of the battery. Specifically, the first conductive element 18 and the second conductive element 19 are used to connect the load outside the housing 11 to the battery inside the cavity 111. Typically, one end of a wire can be connected to the first conductive element 18 and the second conductive element 19, and the other end of the wire can be connected to the load, thereby connecting the load to the power supply. The above embodiment uses the first conductive element 18 and the second conductive element 19 disposed on the cover plate 114. This design can usually shorten the distance between the conductive element and the load, facilitate the connection of the wire, and improve the structural compactness. Of course, if the usage requirements are met, the first conductive element 18 and the second conductive element 19 can also be disposed on the body 113, or one of the first conductive element 18 and the second conductive element 19 can be disposed on the body 113 and the other on the cover plate 114, which provides a high degree of design flexibility.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power supply device, characterized in that, include: The housing has an internal cavity, and a pressure relief hole communicating with the cavity is provided on the housing. A pressure relief valve is at least partially installed in the pressure relief hole and connected to the housing; The battery is disposed within the cavity; A control component is disposed adjacent to the battery within the cavity and is electrically connected to the battery. A voltage-regulating capacitor is used to limit the voltage between the positive and negative terminals of the battery. The voltage-regulating capacitor is disposed adjacent to the battery in the cavity and is electrically connected to the battery. A forced start switch is installed on the housing and electrically connected to the control component. The forced start switch is used to control the battery to supply power to the load when it is under voltage.

2. The power supply device as described in claim 1, characterized in that, The enclosure includes: The body has a hollow interior forming the cavity, and the body has an opening communicating with the cavity; A cover plate is placed over the opening and connected to the main body; A sealing element is disposed between the body and the cover plate; The pressure relief hole is located on the cover plate, and the pressure relief valve is connected to the cover plate.

3. The power supply device as described in claim 2, characterized in that, The body has a first flange formed along the edge of the opening, the cover plate has a corresponding second flange, and the sealing element is disposed between the first flange and the second flange; The first flange and the second flange are connected by a fastener, which passes through at least the first flange and the second flange.

4. The power supply device as described in claim 3, characterized in that, The second flange has a first connecting hole, the sealing element has a second connecting hole, and the first flange has a third connecting hole; The fastener is sequentially inserted into the first connecting hole, the second connecting hole, and the third connecting hole.

5. The power supply device as described in claim 2, characterized in that, The cover plate has mounting holes; wherein the forced start switch is mounted on the cover plate and passes through the mounting holes.

6. The power supply device as described in claim 2, characterized in that, The power supply device also includes: A wireless communication component is provided for transmitting battery status information to a terminal device, and the wireless communication component is electrically connected to the control component.

7. The power supply device as described in claim 6, characterized in that, The wireless communication component is disposed on the side wall of the main body.

8. The power supply device according to any one of claims 2 to 7, characterized in that, The surface of the body and / or the cover plate is provided with a protective coating.

9. The power supply device according to any one of claims 2 to 7, characterized in that, The power supply device also includes: A handle for gripping when moving the power supply device, the handle being disposed on the body and / or the cover plate.

10. The power supply device according to any one of claims 2 to 7, characterized in that, The power supply device further includes a first conductive element and a second conductive element respectively disposed on the cover plate. The first conductive element is electrically connected to the positive terminal of the battery, and the second conductive element is electrically connected to the negative terminal of the battery.

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