Discharge circuit and discharge apparatus

Abstract

The utility model provides a kind of discharging circuit, comprising: external module and discharging module, external module includes first external end and second external end, first external end is used to be connected with the first output end on energy storage device, and second external end is used to be connected with the second output end on energy storage device;Discharging module includes discharging unit, and discharging unit includes discharging resistance, and discharging unit is connected with first external end and second external end to be used to provide discharging path for energy storage device;And at least one of discharging resistance in discharging unit is formed into adjusting resistance, and the resistance value of adjusting resistance gradually reduces along with the execution of discharging process.The discharging circuit of the utility model, by discharging resistance, discharging is carried out to energy storage device, and the setting of adjusting resistance in discharging resistance can effectively avoid spark when contacting, greatly increase the security of operation;It can also guarantee discharging efficiency simultaneously.The utility model further provides a kind of discharging equipment.

Description

Technical Field

[0001] This utility model relates to the field of discharge equipment, and in particular to a discharge circuit and discharge equipment. Background Technology

[0002] In the research, development, production, and maintenance of switching power supplies and LED driver power supplies, there is a common need to discharge the residual high voltage (usually above 400V) of large electrolytic capacitors in the busbar or APFC rectifier output filter. Operators often need to discharge these large-capacity electrolytic capacitors to ensure operational safety. Traditional discharge methods typically use metal tools such as tweezers or needle-nose pliers to directly short-circuit the busbar, forcing the capacitor to discharge rapidly. However, this method easily leads to violent discharge reactions, generating sparks that can burn the PCB copper foil and produce abnormal noises, increasing operational risks. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this invention provides a discharge circuit that discharges energy storage devices through a discharge resistor. The adjustable resistor effectively prevents sparks during contact, greatly increasing operational safety and ensuring discharge efficiency. This invention also provides a discharge device.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] A discharge circuit for discharging an energy storage device, comprising:

[0006] An external module, comprising a first external terminal and a second external terminal, wherein the first external terminal is used to connect to a first output terminal on an energy storage device, and the second external terminal is used to connect to a second output terminal on an energy storage device;

[0007] The discharge module includes a discharge unit, which includes one or more discharge resistors connected in series. The discharge unit is connected to the first external terminal and the second external terminal to provide a discharge path for the energy storage device, so that the electrical energy stored in the energy storage device is consumed through the discharge resistor in the discharge unit. At least one of the discharge resistors in the discharge unit is formed as an adjustment resistor, and the resistance value of the adjustment resistor gradually decreases as the discharge process is executed.

[0008] The gradual decrease in the resistance value of the adjustment resistor can be understood as the overall trend of the resistance value of the adjustment resistor being decreasing. For example, the resistance value of the adjustment resistor may decrease linearly, or decrease non-linearly, or decrease in a step-like manner.

[0009] Using the above technical solution, when in use, the operator can connect the first external terminal and the second external terminal in the external module to the energy storage device. At this time, the discharge unit in the discharge module establishes a discharge path with the energy storage device through the external module. The electrical energy stored in the energy storage device is converted into heat energy and consumed through the discharge resistor in the discharge unit, thereby realizing the discharge of the energy storage device.

[0010] In the above technical solution, since the discharge unit is equipped with the adjusting resistor, the resistance value of the adjusting resistor is relatively large when the discharge circuit has not yet come into contact with the energy storage device to discharge. Therefore, when the discharge circuit comes into contact with the energy storage device to discharge, the initial discharge current is small, which can effectively avoid sparks when contacting, thereby effectively avoiding damage to the discharge equipment equipped with the discharge circuit, and also greatly increasing the safety of operation. As the discharge process continues, the resistance value of the adjusting resistor gradually decreases, so the discharge current gradually increases to improve the discharge efficiency.

[0011] Furthermore, the resistance of the adjusting resistor decreases as the temperature rises.

[0012] By adopting the above technical solution, the setting of the adjustment resistor is more reasonable. When the adjustment resistor is discharging, it will convert electrical energy into heat energy, causing the temperature component to rise. As a result, the resistance value of the adjustment resistor gradually decreases, thus realizing that the resistance value of the adjustment resistor gradually decreases as the discharge process proceeds.

[0013] Furthermore, the adjusting resistor is a thermistor with a negative temperature coefficient.

[0014] By adopting the above technical solution, the adjustment resistor becomes more reasonable.

[0015] Furthermore, the resistance of the adjusting resistor is greater than 5KΩ at 25℃.

[0016] By adopting the above technical solution, the adjustment resistor is made more reasonable. Since the resistance of the adjustment resistor is greater than 5KΩ at 25℃, the resistance of the adjustment resistor is large enough before the discharge circuit contacts the energy storage device to discharge it. This ensures that the initial discharge current is small enough when the discharge circuit contacts the energy storage device to discharge it, and further avoids sparks when contacting it.

[0017] Furthermore, multiple discharge units are provided, and the multiple discharge units are arranged in parallel.

[0018] By adopting the above technical solution, the discharge module becomes more reasonable. When the first external terminal and the second external terminal in the external module are connected to the energy storage device, each discharge unit in the discharge module establishes a discharge path with the energy storage device through the external module to discharge the energy storage device, which greatly improves the discharge efficiency.

[0019] Furthermore, the discharge unit includes at least two discharge resistors, at least one of which is formed as the adjustment resistor, and at least one of the discharge resistors is a conventional resistor with a fixed resistance value.

[0020] The above technical solution makes the discharge unit more reasonable. The conventional resistor with a fixed resistance value in the discharge resistor can ensure that the overall resistance value in the discharge path is not lower than its resistance value, thus avoiding excessive discharge current and unnecessary accidents.

[0021] Specifically, the discharge unit includes two discharge resistors, one of which is formed as the adjustment resistor and the other is a conventional resistor with a fixed resistance value.

[0022] Furthermore, the discharge circuit includes an indicator module for indicating the discharge process, and the indicator module is connected to the external module.

[0023] By adopting the above technical solution, the discharge circuit becomes more reasonable, and the setting of the indicator module enables the operator to understand the current discharge process when the discharge circuit discharges the energy storage device.

[0024] Furthermore, the indicator module includes an indicator unit for indicating whether the discharge process has reached a specific stage, and the indicator unit is connected to the external module.

[0025] The above technical solution makes the indicator module more reasonable.

[0026] Furthermore, the indicating unit includes an indicating light-emitting diode;

[0027] The positive terminal of the indicator LED is connected to the first external terminal, and the negative terminal of the indicator LED is connected to the second external terminal.

[0028] Alternatively, the discharge circuit may include a polarity adapter module, which has a first polarity adapter module input terminal, a second polarity adapter module input terminal, a first polarity adapter module output terminal, and a second polarity adapter module output terminal. The polarity adapter module is configured such that, regardless of the relative polarity of the inputs at the first and second polarity adapter module input terminals, the first polarity adapter module output terminal always maintains a positive polarity, and the second polarity adapter module output terminal always maintains a negative polarity. The light-emitting diode is connected to the external module through the polarity adapter module, with the first polarity adapter module input terminal connected to the first external terminal, the second polarity adapter module input terminal connected to the second external terminal, the first polarity adapter module output terminal connected to the positive terminal of the indicator light-emitting diode, and the second polarity adapter module output terminal connected to the negative terminal of the indicator light-emitting diode.

[0029] Regardless of the relative polarity of the input terminals of the first polarity adapter module and the second polarity adapter module, the output terminal of the first polarity adapter module always maintains a positive polarity, and the output terminal of the second polarity adapter module always maintains a negative polarity. This can be understood as follows: regardless of whether the input terminal of the first polarity adapter module is connected to a positive terminal and the input terminal of the second polarity adapter module is connected to a negative terminal, or vice versa, the output terminal of the first polarity adapter module always maintains a positive polarity, and the output terminal of the second polarity adapter module always maintains a negative polarity.

[0030] By adopting the above technical solution, the discharge circuit becomes more reasonable;

[0031] When the operator connects the first external terminal and the second external terminal of the external module to the energy storage device to discharge the energy storage device, the indicator LED is connected to the energy storage device through the external module. Initially, the energy storage device has sufficient electrical energy, and the indicator LED is in an illuminated state. As the discharge process proceeds, the electrical components in the energy storage device are consumed and cannot support the operation of the indicator LED, so the indicator LED is in a non-illuminated state. Therefore, when the indicator LED is in an illuminated state, the energy storage device discharge is not complete; when the indicator LED is in a non-illuminated state, the energy storage device discharge is complete.

[0032] When the positive terminal of the indicator LED is connected to the first external terminal and the negative terminal of the indicator LED is connected to the second external terminal, the operator needs to pay attention to the connection direction. That is, the operator needs to connect the first external terminal to the positive terminal of the energy storage device and the second external terminal to the negative terminal of the energy storage device to ensure that the indicator LED can work normally.

[0033] When the LED is connected to the external module via the polarity adapter module, the operator does not need to consider the connection direction. That is, the operator can connect the first external terminal to the positive terminal of the energy storage device and the second external terminal to the negative terminal of the energy storage device, or connect the first external terminal to the negative terminal of the energy storage device and the second external terminal to the positive terminal of the energy storage device. The polarity adapter module can ensure that the indicator LED can work normally.

[0034] Preferably, the light-emitting diode is connected to the external module through a polarity adapter module. The above technical solution is easy for operators to use and can effectively avoid adverse effects caused by misuse.

[0035] Furthermore, the polarity adapter module employs a rectifier bridge module, which includes a first adapter diode, a second adapter diode, a third adapter diode, and a fourth adapter diode.

[0036] The positive terminal of the first adapter diode is connected to the input terminal of the first polarity adapter module, and the negative terminal of the first adapter diode is connected to the output terminal of the first polarity adapter module.

[0037] The negative terminal of the second adapter diode is connected to the input terminal of the first polarity adapter module, and the positive terminal of the second adapter diode is connected to the output terminal of the second polarity adapter module.

[0038] The positive terminal of the third adapter diode is connected to the input terminal of the second polarity adapter module, and the negative terminal of the third adapter diode is connected to the output terminal of the first polarity adapter module.

[0039] The negative terminal of the fourth adapter diode is connected to the input terminal of the second polarity adapter module, and the positive terminal of the fourth adapter diode is connected to the output terminal of the second polarity adapter module.

[0040] By adopting the above technical solution, the polarity adaptation module becomes more reasonable;

[0041] When the input terminal of the first polarity adapter module is connected to the positive terminal of the energy storage device and the input terminal of the second polarity adapter module is connected to the negative terminal of the energy storage device, the input terminal of the first polarity adapter module is connected to the output terminal of the first polarity adapter module through the first adapter diode, and the input terminal of the second polarity adapter module is connected to the output terminal of the second polarity adapter module through the fourth adapter diode. At this time, the output terminal of the first polarity adapter module is positive and the output terminal of the second polarity adapter module is negative.

[0042] When the input terminal of the first polarity adapter module is connected to the negative terminal of the energy storage device and the input terminal of the second polarity adapter module is connected to the positive terminal of the energy storage device, the input terminal of the first polarity adapter module is connected to the output terminal of the second polarity adapter module through the second adapter diode, and the input terminal of the second polarity adapter module is connected to the output terminal of the first polarity adapter module through the third adapter diode. At this time, the output terminal of the first polarity adapter module is positive and the output terminal of the second polarity adapter module is negative.

[0043] The above technical solution ensures that, regardless of the relative polarity of the input terminals of the first polarity adapter module and the second polarity adapter module, the output terminal of the first polarity adapter module always maintains a positive polarity, and the output terminal of the second polarity adapter module always maintains a negative polarity.

[0044] Furthermore, the indicating unit includes one or more current-limiting resistors for limiting the current through the indicating light-emitting diode, the current-limiting resistors being connected in series with the indicating light-emitting diode.

[0045] By adopting the above technical solution, the indicator unit becomes more reasonable; the setting of the current-limiting resistor can limit the current through the indicator LED, thereby avoiding excessive current through the indicator LED, ensuring the working environment of the indicator LED, and preventing its damage.

[0046] Furthermore, the indicating unit includes a voltage reference element, the voltage reference element having a preset conduction threshold, and the indicating light-emitting diode is connected in series with the voltage reference element and then connected to the external module. The voltage reference element is configured as follows:

[0047] When the voltage difference between the first external terminal and the second external terminal of the external module is lower than the preset conduction threshold, the voltage reference element blocks the current path, so that the indicator light-emitting diode is in a non-light-emitting state.

[0048] When the voltage difference between the first and second external terminals of the external module reaches or exceeds the preset conduction threshold, the voltage reference element establishes a current path, causing the indicator light-emitting diode to be in an emitting state.

[0049] By adopting the above technical solution, the indicating unit becomes more reasonable; the setting of the voltage reference element enables the operator to intuitively understand whether the voltage of the current energy storage device is lower than a certain specific value.

[0050] Specifically, when the voltage of the energy storage device is higher than a preset conduction threshold of a certain voltage reference element, the voltage difference between the first external terminal and the second external terminal of the external module exceeds the preset conduction threshold of the voltage reference element. At this time, the voltage reference element establishes a current path, causing the indicator light-emitting diode on that path to be in an emitting state. When the voltage of the energy storage device is lower than a preset conduction threshold of a certain voltage reference element, the voltage difference between the first external terminal and the second external terminal of the external module is lower than the preset conduction threshold of the voltage reference element. At this time, the voltage reference element blocks the current path, causing the indicator light-emitting diode on that path to be in a non-emitting state.

[0051] Furthermore, the indicating unit may be provided in one or more forms.

[0052] By adopting the above technical solution, the indicator module becomes more reasonable;

[0053] When only one indicator unit is set, the operator can use the indicator unit to know whether the energy storage device has completed discharging.

[0054] When multiple indicator units are provided, the operator can use these multiple indicator units to understand the progress of the energy storage device and whether the energy storage device has completed discharging.

[0055] Of course, under normal circumstances, the energy storage device does not need to completely release the stored electrical energy. It can be considered that the energy storage device has completed discharging when its voltage drops below the safe voltage. Therefore, only one indicator unit is required. Setting only one indicator unit can simplify the overall structure of the discharge circuit, thereby reducing the overall cost of the discharge device with the discharge circuit and also reducing the overall size of the discharge device with the discharge circuit, making it easier to carry.

[0056] Furthermore, if multiple indicating units are provided:

[0057] Multiple indicator units are connected in parallel; the voltage reference elements in different indicator units have different preset conduction thresholds, forming a stepped preset conduction threshold sequence.

[0058] The above technical solution makes it more reasonable to have multiple indicator units. Since the voltage reference elements in different indicator units have different preset conduction thresholds, forming a stepped preset conduction threshold sequence, the operator only needs to observe which indicator LEDs are in the light-emitting state and which indicator LEDs are in the non-light-emitting state to understand the current voltage value and discharge process of the energy storage device.

[0059] Furthermore, the voltage reference element is a Zener diode, and the breakdown voltage of the Zener diode is the preset conduction threshold of the voltage reference element.

[0060] By adopting the above technical solution, the voltage reference element is made more reasonable. Specifically, the voltage reference element is connected in reverse series in the branch where the indicator light-emitting diode is located, that is:

[0061] When the positive terminal of the indicator LED is connected to the first external terminal and the negative terminal of the indicator LED is connected to the second external terminal, the negative terminal of the voltage reference element is connected to the first external terminal, the positive terminal of the voltage reference element is connected to the positive terminal of the indicator LED, and the negative terminal of the indicator LED is connected to the second external terminal.

[0062] When the light-emitting diode is connected to the external module through the polarity adapter module, the negative terminal of the voltage reference element is connected to the output terminal of the first polarity adapter module, the positive terminal of the voltage reference element is connected to the positive terminal of the indicator light-emitting diode, and the negative terminal of the indicator light-emitting diode is connected to the output terminal of the second polarity adapter module.

[0063] When the voltage of the energy storage device is lower than the breakdown voltage of the voltage reference element, the voltage reference element does not conduct, thereby blocking the current path and causing the indicator light-emitting diode to be in a non-emitting state.

[0064] When the voltage of the energy storage device reaches or exceeds the breakdown voltage of the voltage reference element, the voltage reference element is turned on, thereby establishing a current path for the voltage reference element and causing the indicator light-emitting diode to be in an emitting state.

[0065] A discharge device for discharging an energy storage device, comprising the discharge circuit described above.

[0066] By adopting the above technical solution, the discharge device becomes more reasonable. Due to the use of the above discharge circuit, when the discharge device contacts the energy storage device through the external module in the discharge circuit to discharge, the initial discharge current can be kept small, effectively avoiding sparks during contact and thus effectively preventing damage to the discharge device. At the same time, the safety of operation is greatly increased. As the discharge process continues, the discharge current can gradually increase to improve the discharge efficiency.

[0067] Furthermore, the simple structure of the discharge circuit results in low overall cost of the discharge device and keeps its overall size from becoming too large, making it easy to carry.

[0068] Furthermore, the discharge device includes a circuit board, and the discharge circuit is disposed on the circuit board.

[0069] By adopting the above technical solution, the discharge device becomes more reasonable, and the circuit board provides a setting environment for the discharge circuit.

[0070] Furthermore, the first external terminal and the second external terminal adopt gold finger contact pins.

[0071] The above technical solution makes the first external terminal and the second external terminal more reasonable. Since the first external terminal and the second external terminal use gold finger contact pins, the operator only needs to contact the first external terminal and the second external terminal with the electrode of the energy storage device to realize the connection between the first external terminal and the second external terminal and the electrode of the energy storage device. There is no need to use other components such as wires, which greatly facilitates the actual operation of the operator.

[0072] Furthermore, the first external terminal and the second external terminal are located at the edge of the circuit board, and the outer ends of the first external terminal and the second external terminal protrude beyond the edge of the circuit board.

[0073] By adopting the above technical solution, the first external terminal and the second external terminal are made more reasonable; since the first external terminal and the second external terminal are located at the edge of the circuit board and the end facing outward protrudes from the edge of the circuit board, it is easier for the operator to make contact between the first external terminal and the second external terminal and the electrode of the energy storage device.

[0074] Furthermore, the center distance between the first external terminal and the second external terminal is 5.4 mm.

[0075] The center-to-center distance between the first external terminal and the second external terminal can be understood as the distance between the central axis of the first external terminal and the central axis of the second external terminal.

[0076] By adopting the above technical solution, the first external terminal and the second external terminal are more reasonable; the center distance between the first external terminal and the second external terminal is 5.4mm, which enables the first external terminal and the second external terminal to be compatible with electrolytic capacitors of Φ8~Φ20mm, so that the external module in the discharge device can contact the electrodes of the electrolytic capacitors of Φ8~Φ20mm to realize the discharge operation. The above technical solution makes the discharge device more versatile.

[0077] Furthermore, the circuit board is a double-sided circuit board.

[0078] By adopting the above technical solution, the circuit board becomes more reasonable. The circuit board is a double-sided circuit board, which can greatly reduce the size of the circuit board, thereby making the overall size of the discharge device very compact and easy to carry.

[0079] Furthermore, the overall dimensions of the circuit board and the first and second external terminals are 38*11.5mm.

[0080] By adopting the above technical solution, the size of the discharge device is made more reasonable and easier to carry.

[0081] Compared with the prior art, the present invention has the following beneficial effects:

[0082] (1) The discharge circuit and discharge device of this utility model discharge the energy storage device through the discharge resistor, and the setting of the adjustable resistor in the discharge resistor can effectively avoid the generation of sparks when contacting, which greatly increases the safety of operation; at the same time, it can also ensure the discharge efficiency.

[0083] (2) The discharge circuit and discharge device of this utility model are reasonably designed, low in cost, small in size and easy to carry. Attached Figure Description

[0084] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0085] Figure 1 This is a schematic diagram of the discharge circuit (without a voltage reference element) of this utility model;

[0086] Figure 2 This is a schematic diagram of the discharge circuit (with a voltage reference element) of this utility model;

[0087] Figure 3 This is a schematic diagram showing the dimensions of the discharge device of this utility model;

[0088] Figure 4 This is a front view of the circuit board in the discharge device of this utility model;

[0089] Figure 5 This is a schematic diagram of the back of the circuit board in the discharge device of this utility model;

[0090] The component names corresponding to the various reference numerals in the figure are as follows: 1. External module; 101. First external terminal; 102. Second external terminal; 2. Discharge module; 201. Discharge unit; 2011. Discharge resistor; 2011a. Adjustment resistor; 2011b. Conventional resistor; 3. Indicator module; 301. Indicator module; 3011. Indicator LED; 3012. Current limiting resistor; 3013. Voltage reference element; 4. Polarity adapter module; 401. Input terminal of the first polarity adapter module; 402. Input terminal of the second polarity adapter module; 403. Output terminal of the first polarity adapter module; 404. Output terminal of the second polarity adapter module; 405. First adapter diode; 406. Second adapter diode; 407. Third adapter diode; 408. Fourth adapter diode; 100. Energy storage device. Detailed Implementation

[0091] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0092] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0093] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0094] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0095] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0096] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0097] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0098] See Figures 1 to 2 This utility model provides a discharge circuit for discharging an energy storage device 100, comprising:

[0099] External module 1, the external module 1 includes a first external terminal 101 and a second external terminal 102, the first external terminal 101 is used to connect to a first output terminal on the energy storage device 100, and the second external terminal 102 is used to connect to a second output terminal on the energy storage device 100;

[0100] The discharge module 2 includes a discharge unit 201, which includes one or more discharge resistors 2011 connected in series. The discharge unit 201 is connected to the first external terminal 101 and the second external terminal 102 to provide a discharge path for the energy storage device 100, so that the electrical energy stored in the energy storage device 100 is consumed through the discharge resistors 2011 in the discharge unit 201. At least one of the discharge resistors 2011 in the discharge unit 201 is formed as an adjustment resistor 2011a, and the resistance value of the adjustment resistor 2011a gradually decreases as the discharge process is executed.

[0101] The gradual decrease in the resistance value of the adjustment resistor 2011a can be understood as the overall trend of the resistance value of the adjustment resistor 2011a being decreasing. For example, the resistance value of the adjustment resistor 2011a may decrease linearly, or decrease non-linearly, or decrease in a step-like manner.

[0102] Using the above technical solution, when in use, the operator can connect the first external terminal 101 and the second external terminal in the external module 1 to the energy storage device 100. At this time, the discharge unit 201 in the discharge module 2 establishes a discharge path with the energy storage device 100 through the external module 1. The electrical energy stored in the energy storage device 100 is converted into heat energy and consumed through the discharge resistor 2011 in the discharge unit 201, thereby realizing the discharge of the energy storage device 100.

[0103] In the above technical solution, since the discharge unit 201 is provided with the adjustment resistor 2011a, the resistance of the adjustment resistor 2011a is relatively large when the discharge circuit has not yet come into contact with the energy storage device 100 to discharge. Therefore, when the discharge circuit comes into contact with the energy storage device 100 to discharge, the initial discharge current is small, which can effectively avoid sparks when contacting, thereby effectively avoiding damage to the discharge device provided with the discharge circuit, and also greatly increasing the safety of operation. As the discharge process continues, the resistance of the adjustment resistor 2011a gradually decreases, so the discharge current gradually increases to improve the discharge efficiency.

[0104] Furthermore, the resistance of the adjusting resistor 2011a decreases as the temperature rises.

[0105] By adopting the above technical solution, the setting of the adjustment resistor 2011a is more reasonable. When the adjustment resistor 2011a is discharging, it will convert electrical energy into heat energy, causing the temperature component to rise. As a result, the resistance value of the adjustment resistor 2011a gradually decreases, thus realizing that the resistance value of the adjustment resistor 2011a gradually decreases as the discharge process is carried out.

[0106] Furthermore, the adjusting resistor 2011a is a thermistor with a negative temperature coefficient.

[0107] By adopting the above technical solution, the adjustment resistor 2011a becomes more reasonable.

[0108] Furthermore, the resistance of the adjusting resistor 2011a is greater than 5KΩ at 25℃.

[0109] By adopting the above technical solution, the adjustment resistor 2011a is made more reasonable. Since the resistance of the adjustment resistor 2011a is greater than 5KΩ at 25℃, the resistance of the adjustment resistor 2011a is large enough before the discharge circuit contacts the energy storage device 100 to discharge it. This ensures that the initial discharge current when the discharge circuit contacts the energy storage device 100 to discharge it is small enough, and further avoids sparks when contacting it.

[0110] Furthermore, multiple discharge units 201 are provided, and the multiple discharge units 201 are arranged in parallel.

[0111] By adopting the above technical solution, the discharge module 2 becomes more reasonable. When the first external terminal 101 and the second external terminal in the external module 1 are connected to the energy storage device 100, each discharge unit 201 in the discharge module 2 establishes a discharge path with the energy storage device 100 through the external module 1 to discharge the energy storage device 100, which greatly improves the discharge efficiency.

[0112] Furthermore, the discharge unit 201 includes at least two discharge resistors 2011, at least one of the discharge resistors 2011 is formed as the adjustment resistor 2011a, and at least one of the discharge resistors 2011 is a conventional resistor 2011b with a fixed resistance value.

[0113] By adopting the above technical solution, the discharge unit 201 is made more reasonable. The conventional resistor 2011b with a fixed resistance value in the discharge resistor 2011 can ensure that the overall resistance value in the discharge path is not lower than its resistance value, so as to avoid excessive discharge current and unnecessary accidents.

[0114] Specifically, the discharge unit 201 includes two discharge resistors 2011, one of which is formed as the adjustment resistor 2011a, and the other discharge resistor 2011 is a conventional resistor 2011b with a fixed resistance value.

[0115] Furthermore, the discharge circuit includes an indicator module 3 for indicating the discharge process, and the indicator module 3 is connected to the external module 1.

[0116] By adopting the above technical solution, the discharge circuit becomes more reasonable. The setting of the indicator module 3 enables the operator to understand the current discharge process when the discharge circuit discharges the energy storage device 100.

[0117] Furthermore, the indicator module 3 includes an indicator unit 301 for indicating whether the discharge process has reached a specific stage, and the indicator unit 301 is connected to the external module 1.

[0118] The above technical solution makes the indicator module 3 more reasonable.

[0119] Furthermore, the indicating unit 301 includes an indicating light-emitting diode 3011;

[0120] The positive terminal of the indicator light-emitting diode 3011 is connected to the first external terminal 101, and the negative terminal of the indicator light-emitting diode 3011 is connected to the second external terminal 102.

[0121] Alternatively, the discharge circuit may include a polarity adapter module 4, which has a first polarity adapter module input terminal 401, a second polarity adapter module input terminal 402, a first polarity adapter module output terminal 403, and a second polarity adapter module output terminal 404. The polarity adapter module 4 is configured such that, regardless of the relative polarity of the inputs to the first polarity adapter module input terminal 401 and the second polarity adapter module input terminal 402, the first polarity adapter module output terminal 403 always maintains a positive polarity, and the second polarity adapter module output terminal 404... The output terminal 404 of the polarity adapter module always maintains a negative polarity; the light-emitting diode is connected to the external module 1 through the polarity adapter module 4, the input terminal 401 of the first polarity adapter module is connected to the first external terminal 101, the input terminal 402 of the second polarity adapter module is connected to the second external terminal 102, the output terminal 403 of the first polarity adapter module is connected to the positive terminal of the indicator light-emitting diode 3011, and the output terminal 404 of the second polarity adapter module is connected to the negative terminal of the indicator light-emitting diode 3011.

[0122] Regardless of the relative polarity of the input terminals 401 and 402 of the first polarity adapter module, the output terminal 403 of the first polarity adapter module always maintains a positive polarity, and the output terminal 404 of the second polarity adapter module always maintains a negative polarity. This can be understood as follows: regardless of whether the input terminal 401 of the first polarity adapter module is connected to a positive terminal and the input terminal 402 of the second polarity adapter module is connected to a negative terminal, or whether the input terminal 401 of the first polarity adapter module is connected to a negative terminal and the input terminal 402 of the second polarity adapter module is connected to a positive terminal, the output terminal 403 of the first polarity adapter module always maintains a positive polarity, and the output terminal 404 of the second polarity adapter module always maintains a negative polarity.

[0123] By adopting the above technical solution, the discharge circuit becomes more reasonable;

[0124] When the operator connects the first external terminal 101 and the second external terminal of the external module 1 to the energy storage device 100 to discharge the energy storage device 100, the indicator LED 3011 is connected to the energy storage device 100 through the external module 1. Initially, the energy storage device 100 has sufficient electrical energy, and the indicator LED 3011 is in an emitting state. As the discharge process proceeds, the electrical components in the energy storage device 100 are consumed and cannot support the operation of the indicator LED 3011, so the indicator LED 3011 is in a non-emitting state. Therefore, when the indicator LED 3011 is in an emitting state, the discharge of the energy storage device 100 is not complete; when the indicator LED 3011 is in a non-emitting state, the discharge of the energy storage device 100 is complete.

[0125] When the positive terminal of the indicator LED 3011 is connected to the first external terminal 101 and the negative terminal of the indicator LED 3011 is connected to the second external terminal 102, the operator needs to pay attention to the connection direction. That is, the operator needs to connect the first external terminal 101 to the positive terminal of the energy storage device 100 and the second external terminal 102 to the negative terminal of the energy storage device 100 to ensure that the indicator LED 3011 can work normally.

[0126] When the light-emitting diode is connected to the external module 1 via the polarity adapter module 4, the operator does not need to consider the connection direction. That is, the operator can connect the first external terminal 101 to the positive terminal of the energy storage device 100 and the second external terminal 102 to the negative terminal of the energy storage device 100, or connect the first external terminal 101 to the negative terminal of the energy storage device 100 and the second external terminal 102 to the positive terminal of the energy storage device 100. The polarity adapter module 4 can ensure that the indicator light-emitting diode 3011 can work normally.

[0127] Preferably, the light-emitting diode is connected to the external module 1 through the polarity adapter module 4. The above technical solution is easy for operators to use and can effectively avoid adverse effects caused by misuse.

[0128] Furthermore, the polarity adapter module 4 adopts a rectifier bridge module, which includes a first adapter diode 405, a second adapter diode 406, a third adapter diode 407, and a fourth adapter diode 408.

[0129] The positive terminal of the first adapter diode 405 is connected to the input terminal 401 of the first polarity adapter module, and the negative terminal of the first adapter diode 405 is connected to the output terminal 403 of the first polarity adapter module.

[0130] The negative terminal of the second adapter diode 406 is connected to the input terminal 401 of the first polarity adapter module, and the positive terminal of the second adapter diode 406 is connected to the output terminal 404 of the second polarity adapter module.

[0131] The positive terminal of the third adapter diode 407 is connected to the input terminal 402 of the second polarity adapter module, and the negative terminal of the third adapter diode 407 is connected to the output terminal 403 of the first polarity adapter module.

[0132] The negative terminal of the fourth adapter diode 408 is connected to the input terminal 402 of the second polarity adapter module, and the positive terminal of the fourth adapter diode 408 is connected to the output terminal 404 of the second polarity adapter module.

[0133] The above technical solution makes the polarity adaptation module 4 more reasonable;

[0134] When the input terminal 401 of the first polarity adapter module is connected to the positive terminal of the energy storage device 100 and the input terminal 402 of the second polarity adapter module is connected to the negative terminal of the energy storage device 100, the input terminal 401 of the first polarity adapter module is connected to the output terminal 403 of the first polarity adapter module through the first adapter diode 405, and the input terminal 402 of the second polarity adapter module is connected to the output terminal 404 of the second polarity adapter module through the fourth adapter diode 408. At this time, the output terminal 403 of the first polarity adapter module is positive and the output terminal 404 of the second polarity adapter module is negative.

[0135] When the input terminal 401 of the first polarity adapter module is connected to the negative terminal of the energy storage device 100 and the input terminal 402 of the second polarity adapter module is connected to the positive terminal of the energy storage device 100, the input terminal 401 of the first polarity adapter module is connected to the output terminal 404 of the second polarity adapter module through the second adapter diode 406, and the input terminal 402 of the second polarity adapter module is connected to the output terminal 403 of the first polarity adapter module through the third adapter diode 407. At this time, the output terminal 403 of the first polarity adapter module is positive and the output terminal 404 of the second polarity adapter module is negative.

[0136] The above technical solution ensures that, regardless of the relative polarity of the input terminals 401 and 402 of the first polarity adapter module, the output terminal 403 of the first polarity adapter module always maintains a positive polarity, and the output terminal 404 of the second polarity adapter module always maintains a negative polarity.

[0137] Furthermore, the indicator unit 301 includes one or more current-limiting resistors 3012 for limiting the current through the indicator light-emitting diode 3011, the current-limiting resistors 3012 being connected in series with the indicator light-emitting diode 3011.

[0138] By adopting the above technical solution, the indicator unit 301 becomes more reasonable; the current limiting resistor 3012 can limit the current through the indicator LED 3011, thereby avoiding excessive current through the indicator LED 3011, ensuring the working environment of the indicator LED 3011, and preventing its damage.

[0139] Further, the indicating unit 301 includes a voltage reference element 3013, which has a preset conduction threshold. The indicating light-emitting diode 3011 is connected in series with the voltage reference element 3013 and then connected to the external module 1. The voltage reference element 3013 is configured as follows:

[0140] When the voltage difference between the first external terminal 101 and the second external terminal 102 of the external module 1 is lower than the preset conduction threshold, the voltage reference element 3013 blocks the current path, so that the indicator light-emitting diode 3011 is in a non-light-emitting state.

[0141] When the voltage difference between the first external terminal 101 and the second external terminal 102 of the external module 1 reaches or exceeds the preset conduction threshold, the voltage reference element 3013 establishes a current path, so that the indicator light-emitting diode 3011 is in the light-emitting state.

[0142] By adopting the above technical solution, the indicator unit 301 becomes more reasonable; the setting of the voltage reference element 3013 enables the operator to intuitively understand whether the voltage of the current energy storage device 100 is lower than a certain specific value.

[0143] Specifically, when the voltage of the energy storage device 100 is higher than a preset conduction threshold of a certain voltage reference element 3013, the voltage difference between the first external terminal 101 and the second external terminal 102 of the external module 1 exceeds the preset conduction threshold of the voltage reference element 3013. At this time, the voltage reference element 3013 establishes a current path, causing the indicator light-emitting diode 3011 on that path to be in a light-emitting state. When the voltage of the energy storage device 100 is lower than a preset conduction threshold of a certain voltage reference element 3013, the voltage difference between the first external terminal 101 and the second external terminal 102 of the external module 1 is lower than the preset conduction threshold of the voltage reference element 3013. At this time, the voltage reference element 3013 blocks the current path, causing the indicator light-emitting diode 3011 on that path to be in a non-light-emitting state.

[0144] Furthermore, the indicating unit 301 is provided with one or more.

[0145] By adopting the above technical solution, the indicator module 3 becomes more reasonable;

[0146] When only one indicator unit 301 is provided, the operator can use the indicator unit 301 to know whether the energy storage device 100 has completed discharging.

[0147] When multiple indicator units 301 are provided, the operator can use these multiple indicator units 301 to understand the progress of the energy storage device 100 and whether the energy storage device 100 has completed discharging.

[0148] Of course, under normal circumstances, the energy storage device 100 does not need to completely release the stored electrical energy. It is considered that the energy storage device 100 has completed discharging when its voltage drops below the safe voltage. Therefore, only one indicator unit 301 is required. With only one indicator unit 301, the overall structure of the discharge circuit can be simplified, thereby reducing the overall cost of the discharge device with the discharge circuit and also reducing the overall size of the discharge device with the discharge circuit, making it easier to carry.

[0149] Furthermore, if multiple indicating units 301 are provided:

[0150] Multiple indicator units 301 are connected in parallel; the voltage reference element 3013 in different indicator units 301 have different preset conduction thresholds, forming a stepped preset conduction threshold sequence.

[0151] The above technical solution makes it more reasonable to have multiple indicator units 301. Since the voltage reference elements 3013 in different indicator units 301 have different preset conduction thresholds, forming a stepped preset conduction threshold sequence, the operator only needs to observe which indicator LEDs 3011 are in the light-emitting state and which indicator LEDs 3011 are in the non-light-emitting state to understand the current voltage value and discharge process of the energy storage device 100.

[0152] Furthermore, the voltage reference element 3013 is a Zener diode, and the breakdown voltage of the Zener diode is the preset conduction threshold of the voltage reference element 3013.

[0153] By adopting the above technical solution, the voltage reference element 3013 becomes more reasonable. Specifically, the voltage reference element 3013 is connected in reverse series in the branch where the indicator light-emitting diode 3011 is located, that is:

[0154] When the positive terminal of the indicator LED 3011 is connected to the first external terminal 101 and the negative terminal of the indicator LED 3011 is connected to the second external terminal 102, the negative terminal of the voltage reference element 3013 is connected to the first external terminal 101, the positive terminal of the voltage reference element 3013 is connected to the positive terminal of the indicator LED 3011, and the negative terminal of the indicator LED 3011 is connected to the second external terminal 102.

[0155] When the light-emitting diode is connected to the external module 1 through the polarity adapter module 4, the negative terminal of the voltage reference element 3013 is connected to the output terminal 403 of the first polarity adapter module, the positive terminal of the voltage reference element 3013 is connected to the positive terminal of the indicator light-emitting diode 3011, and the negative terminal of the indicator light-emitting diode 3011 is connected to the output terminal 404 of the second polarity adapter module.

[0156] When the voltage of the energy storage device 100 is lower than the breakdown voltage of the voltage reference element 3013, the voltage reference element 3013 is not turned on, thereby blocking the current path and making the indicator light-emitting diode 3011 in a non-light-emitting state.

[0157] When the voltage of the energy storage device 100 reaches or exceeds the breakdown voltage of the voltage reference element 3013, the voltage reference element 3013 is turned on, thereby establishing a current path in the voltage reference element 3013, so that the indicator light-emitting diode 3011 is in the light-emitting state.

[0158] See Figures 1 to 5 A discharge device for discharging an energy storage device 100, comprising the discharge circuit described above.

[0159] By adopting the above technical solution, the discharge device becomes more reasonable. Due to the use of the above discharge circuit, when the discharge device contacts the energy storage device 100 through the external module 1 in the discharge circuit to discharge, the initial discharge current can be kept small, effectively avoiding sparks when in contact, thereby effectively preventing damage to the discharge device and greatly increasing the safety of operation. As the discharge process continues, the discharge current can gradually increase to improve the discharge efficiency.

[0160] Furthermore, the simple structure of the discharge circuit results in low overall cost of the discharge device and keeps its overall size from becoming too large, making it easy to carry.

[0161] Furthermore, the discharge device includes a circuit board, and the discharge circuit is disposed on the circuit board.

[0162] By adopting the above technical solution, the discharge device becomes more reasonable, and the circuit board provides a setting environment for the discharge circuit.

[0163] Furthermore, the first external terminal 101 and the second external terminal 102 adopt gold finger contact pins.

[0164] By adopting the above technical solution, the first external terminal 101 and the second external terminal 102 are made more reasonable. Since the first external terminal 101 and the second external terminal 102 use gold finger contact pins, the operator only needs to contact the first external terminal 101 and the second external terminal 102 with the electrodes of the energy storage device 100 to realize the connection between the first external terminal 101 and the second external terminal 102 and the electrodes of the energy storage device 100, without the need to use other components such as wires, which greatly facilitates the actual operation of the operator.

[0165] Furthermore, the first external terminal 101 and the second external terminal 102 are located at the edge of the circuit board, and one end of the first external terminal 101 and the second external terminal 102 protrudes outward from the edge of the circuit board.

[0166] By adopting the above technical solution, the first external terminal 101 and the second external terminal 102 are more reasonable. Since the first external terminal 101 and the second external terminal 102 are located at the edge of the circuit board and one end of the external terminal protrudes outward from the edge of the circuit board, it is easier for the operator to make contact between the first external terminal 101 and the second external terminal 102 and the electrode of the energy storage device 100.

[0167] Furthermore, the center distance between the first external terminal 101 and the second external terminal 102 is 5.4 mm.

[0168] The center distance between the first external terminal 101 and the second external terminal 102 can be understood as the distance between the central axis of the first external terminal 101 and the central axis of the second external terminal 102.

[0169] By adopting the above technical solution, the first external terminal 101 and the second external terminal 102 are more reasonable; the center distance between the first external terminal 101 and the second external terminal 102 is 5.4mm, which enables the first external terminal 101 and the second external terminal 102 to be compatible with electrolytic capacitors of Φ8~Φ20mm, so that the external module 1 in the discharge device can contact the electrodes of the electrolytic capacitors of Φ8~Φ20mm to realize the discharge operation. The above technical solution makes the discharge device more versatile.

[0170] Furthermore, the circuit board is a double-sided circuit board.

[0171] By adopting the above technical solution, the circuit board becomes more reasonable. The circuit board is a double-sided circuit board, which can greatly reduce the size of the circuit board, thereby making the overall size of the discharge device very compact and easy to carry.

[0172] Furthermore, the overall dimensions of the circuit board, the first external terminal 101, and the second external terminal 102 are 38*11.5mm.

[0173] By adopting the above technical solution, the size of the discharge device is made more reasonable and easier to carry.

[0174] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0175] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be defined by the scope of the claims.

Claims

1. A discharge circuit for discharging an energy storage device (100), characterized in that, include: An external module (1) includes a first external terminal (101) and a second external terminal (102). The first external terminal (101) is used to connect to a first output terminal on an energy storage device (100), and the second external terminal (102) is used to connect to a second output terminal on an energy storage device (100). The discharge module (2) includes a discharge unit (201), which includes a discharge resistor (2011) or multiple discharge resistors (2011) connected in series. The discharge unit (201) is connected to the first external terminal (101) and the second external terminal (102) to provide a discharge path for the energy storage device (100), so that the electrical energy stored in the energy storage device (100) is consumed through the discharge resistor (2011) in the discharge unit (201). At least one of the discharge resistors (2011) in the discharge unit (201) is formed as an adjustment resistor (2011a), and the resistance value of the adjustment resistor (2011a) gradually decreases as the discharge process is executed.

2. The discharge circuit according to claim 1, characterized in that: The resistance of the adjusting resistor (2011a) decreases as the temperature rises; The adjustment resistor (2011a) is a thermistor with a negative temperature coefficient.

3. The discharge circuit according to claim 1, characterized in that: The resistance of the adjustment resistor (2011a) is greater than 5KΩ at 25℃.

4. The discharge circuit of claim 1, wherein: Multiple discharge units (201) are provided, and multiple discharge units (201) are arranged in parallel; Furthermore, the discharge unit (201) includes at least two discharge resistors (2011), at least one of the discharge resistors (2011) being formed as the adjustment resistor (2011a), and at least one of the discharge resistors (2011) being a conventional resistor (2011b) with a fixed resistance value.

5. The discharge circuit of claim 1, wherein: It includes an indicator module (3) for indicating the discharge process, which is connected to the external module (1).

6. The discharge circuit according to claim 5, characterized in that: The indicator module (3) includes an indicator unit (301) for indicating whether the discharge process has reached a specific stage, and the indicator unit (301) is connected to the external module (1). The indicator unit (301) includes an indicator light-emitting diode (3011). The positive terminal of the indicator light-emitting diode (3011) is connected to the first external terminal (101), and the negative terminal of the indicator light-emitting diode (3011) is connected to the second external terminal (102); Alternatively, the discharge circuit may include a polarity adapter module (4), which has a first polarity adapter module input terminal (401), a second polarity adapter module input terminal (402), a first polarity adapter module output terminal (403), and a second polarity adapter module output terminal (404). The polarity adapter module (4) is configured such that, regardless of the relative polarity of the inputs to the first polarity adapter module input terminal (401) and the second polarity adapter module input terminal (402), the first polarity adapter module output terminal (403) always maintains a positive polarity, and the second polarity... The output terminal (404) of the adapter module always maintains a negative polarity; the light-emitting diode is connected to the external module (1) through the polarity adapter module (4), the input terminal (401) of the first polarity adapter module is connected to the first external terminal (101), the input terminal (402) of the second polarity adapter module is connected to the second external terminal (102), the output terminal (403) of the first polarity adapter module is connected to the positive terminal of the indicator light-emitting diode (3011), and the output terminal (404) of the second polarity adapter module is connected to the negative terminal of the indicator light-emitting diode (3011).

7. The discharge circuit of claim 6, wherein: The polarity adapter module (4) adopts a rectifier bridge module, which includes a first adapter diode (405), a second adapter diode (406), a third adapter diode (407) and a fourth adapter diode (408). The positive terminal of the first adapter diode (405) is connected to the input terminal (401) of the first polarity adapter module, and the negative terminal of the first adapter diode (405) is connected to the output terminal (403) of the first polarity adapter module. The negative terminal of the second adapter diode (406) is connected to the input terminal (401) of the first polarity adapter module, and the positive terminal of the second adapter diode (406) is connected to the output terminal (404) of the second polarity adapter module. The positive terminal of the third adapter diode (407) is connected to the input terminal (402) of the second polarity adapter module, and the negative terminal of the third adapter diode (407) is connected to the output terminal (403) of the first polarity adapter module. The negative terminal of the fourth adapter diode (408) is connected to the input terminal (402) of the second polarity adapter module, and the positive terminal of the fourth adapter diode (408) is connected to the output terminal (404) of the second polarity adapter module.

8. The discharge circuit according to claim 6, characterized in that: The indicator unit (301) includes one or more current-limiting resistors (3012) for limiting the current through the indicator light-emitting diode (3011), the current-limiting resistors (3012) being connected in series with the indicator light-emitting diode (3011); The indicating unit (301) includes a voltage reference element (3013), which has a preset conduction threshold. The indicating light-emitting diode (3011) is connected in series with the voltage reference element (3013) and then connected to the external module (1). The voltage reference element (3013) is configured as follows: When the voltage difference between the first external terminal (101) and the second external terminal (102) of the external module (1) is lower than the preset conduction threshold, the voltage reference element (3013) blocks the current path, so that the indicator light-emitting diode (3011) is in a non-light-emitting state. When the voltage difference between the first external terminal (101) and the second external terminal (102) of the external module (1) reaches or exceeds the preset conduction threshold, the voltage reference element (3013) establishes a current path, so that the indicator light-emitting diode (3011) is in the light-emitting state. The indicator unit (301) is provided with one or more; In the case where multiple indication units (301) are provided: Multiple indicator units (301) are connected in parallel; the voltage reference element (3013) in different indicator units (301) has different preset conduction thresholds, forming a stepped preset conduction threshold sequence; The voltage reference element (3013) is a Zener diode.

9. A discharge device for discharging an energy storage device (100), characterized in that: Includes the discharge circuit described in any one of claims 1 to 8.

10. The discharge device according to claim 9, characterized in that: Includes a circuit board, and the discharge circuit is disposed on the circuit board; The first external terminal (101) and the second external terminal (102) are gold finger contact pins. The first external terminal (101) and the second external terminal (102) are located at the edge of the circuit board, and the outer end of the first external terminal (101) and the second external terminal (102) protrudes outward from the edge of the circuit board. The center distance between the first external terminal (101) and the second external terminal (102) is 5.4 mm; The circuit board is a double-sided circuit board; The overall dimensions of the circuit board, the first external terminal (101), and the second external terminal (102) are 38*11.5mm.

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