Retired battery discharge device

Abstract

The utility model provides a retired battery discharge device for discharging retired batteries, wherein the retired battery discharge device comprises: a box; a connection port, which is arranged on the box and can be used to connect retired batteries; a power consumption element, which is arranged in the box and can consume the residual power in the retired batteries; a battery, which is arranged in the box and can reversely charge the retired batteries; a measuring element, which is arranged on the box and can measure the voltage value and / or current value of the retired battery during discharge and the voltage value and / or current value of the battery. The technical solution of the present application can effectively solve the problem in the related art that the characteristic of the lithium-ion battery having a voltage recovery after the discharge is terminated affects the subsequent storage, processing and other processes.

Description

Technical Field

[0001] The utility model relates to the field of environmental protection and comprehensive utilization of resources, and in particular to a retired battery discharge device. Background Art

[0002] In recent years, with the rapid rise of the new energy vehicle industry, a large number of waste power batteries will be generated. The recycling of waste lithium batteries can not only solve the environmental pollution caused by battery disposal, but also bring huge economic value, which is of great significance.

[0003] After the lithium-ion battery is retired, there is still residual power, which poses a great safety hazard in the transportation, storage and comprehensive treatment process. In order to facilitate the comprehensive recycling of waste lithium-ion batteries safely and efficiently, they should be discharged before recycling. In terms of lithium battery discharge, there are also some public schemes, such as the discharge cabinet disclosed in the relevant technology, including a positive power supply terminal and a negative power supply terminal for connecting to a DC power supply, as well as a control board, a buck chopper circuit, a first voltage detection circuit, and a discharge circuit. The first voltage detection circuit is arranged in parallel between the positive power supply terminal and the negative power supply terminal, and the output end of the first voltage detection circuit is connected to the detection signal input end of the control board; the control end of the control board is connected to the control end of the buck chopper circuit; the input end of the buck chopper circuit is connected to the positive power supply terminal, and the output end of the buck chopper circuit is connected to the discharge circuit; wherein the first voltage detection circuit is used to detect the DC bus voltage of the DC power supply; the control board is used to control the buck chopper circuit to work according to the detected DC bus voltage, so as to trigger the discharge circuit to discharge the DC power supply.

[0004] However, the existing solutions still have the following problems:

[0005] 1. The discharge cabinets on the market need to be fixed in one position for discharge, and the battery modules need to be placed in a predetermined position during discharge. This makes it difficult to discharge retired power lithium batteries that are dangerous or inconvenient to transport.

[0006] 2. Since lithium-ion batteries have the characteristic that their voltage will rise after the discharge of electrical energy is completed, two problems arise. The first is that it takes a very long time to discharge all the battery energy. The second is that the battery voltage will rise after discharge, which will still pose a danger to storage and subsequent processing processes. Utility Model Content

[0007] The main purpose of the utility model is to provide a retired battery discharge device to solve the problem in the related art that the voltage of lithium-ion batteries will rise after the discharge is terminated, which affects the subsequent storage, processing and other processes.

[0008] In order to achieve the above-mentioned purpose, the utility model provides a retired battery discharge device, comprising: a box body; a connection port, which is arranged on the box body and can be used to connect the retired battery; a power-consuming element, which is arranged in the box body and can consume the residual power in the retired battery; a battery, which is arranged in the box body and can reverse charge the retired battery; and a measuring element, which is arranged on the box body and can measure the voltage value and / or current value of the retired battery during the discharge process and the voltage value and / or current value of the battery.

[0009] Furthermore, the retired battery discharge device is provided with a discharge circuit for consuming the residual power in the retired battery, a reverse charging circuit for reverse charging the retired battery, and a charging circuit for charging the battery, wherein the discharge circuit, the reverse charging circuit and the charging circuit are all connected to the connection port, the power-consuming element is arranged in the discharge circuit, and the battery is arranged in the reverse charging circuit and the charging circuit.

[0010] Furthermore, the discharge circuit has a first circuit breaker, which has a first operating member exposed outside the box; and / or, the reverse charging circuit has a second circuit breaker, which has a second operating member exposed outside the box; and / or, the charging circuit has a third circuit breaker, which has a third operating member exposed outside the box.

[0011] Further, the measuring element includes an ammeter arranged in the discharge circuit, the ammeter is arranged in series with the power-consuming element, the ammeter has a first display screen, and the first display screen is exposed from the box; and / or, the measuring element includes a first voltmeter, the first voltmeter is arranged in parallel with the retired battery, the first voltmeter has a second display screen, and the second display screen is exposed from the box.

[0012] Furthermore, the discharge circuit also includes a power supply circuit arranged in parallel with the power-consuming element, and a first step-down transformer and a heat sink are arranged in the power supply circuit. The first step-down transformer can reduce the first voltage of the retired battery to a second voltage to supply power to the heat sink.

[0013] Furthermore, the box body includes a first side wall and a second side wall that are arranged opposite to each other, the first side wall is provided with a first vent, the second side wall is provided with a second vent corresponding to the first vent, the heat sink is arranged at the first vent, and the power-consuming component is arranged between the first vent and the second vent.

[0014] Furthermore, a second step-down transformer is provided in the reverse charging circuit, and the second step-down transformer can reduce the third voltage of the battery to a fourth voltage for reverse charging the retired battery.

[0015] Furthermore, the measuring element comprises a second voltmeter arranged in parallel with the battery, the second voltmeter has a third display screen, and the third display screen is exposed from the box body.

[0016] Furthermore, the retired battery discharge device also includes a three-phase switching knob, which has a first working position, a second working position and a third working position, wherein when the three-phase switching knob is in the first working position, the reverse charging circuit and the charging circuit are both disconnected; when the three-phase switching knob is in the second working position, the reverse charging circuit is turned on and the charging circuit is disconnected; when the three-phase switching knob is in the third working position, the charging circuit is turned on and the reverse charging circuit is disconnected.

[0017] Furthermore, the battery is removably inserted into the side wall of the box and partially extends out of the box.

[0018] By applying the technical solution of the utility model, the box of the retired battery discharge device provides a mounting base for other components, wherein the connection port is arranged on the box and can be used to connect the retired battery, and the positive and negative poles of the retired battery are respectively connected to the connection port to connect the retired battery to the internal circuit of the retired battery discharge device. The retired battery discharge device also includes a power-consuming element and a battery, wherein, after the retired battery is connected to the internal circuit of the retired battery discharge device, the power-consuming element can be used to consume the residual power in the retired battery to realize the discharge of the retired battery, and when the retired battery is discharged to a certain extent, the retired battery can be reversely charged by the battery, so that the residual power in the retired battery can be completely released. In addition, the battery is a movable battery, which does not need to be connected to an external power input device such as a mains when in use, thereby enabling the entire retired battery discharge device to be flexibly moved without being set in a specific position, making the use of the retired battery discharge device more flexible and convenient, and can be used to discharge dangerous or inconveniently transported retired batteries. Therefore, the technical solution of the present application can effectively solve the problem in the related art that the characteristic of the lithium-ion battery having a voltage recovery after the discharge is terminated affects the subsequent storage, processing and other processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 A schematic front view of an embodiment of a retired battery discharge device according to the utility model is shown;

[0021] Figure 2 Shows Figure 1 A rear view schematic diagram of a retired battery discharge device;

[0022] Figure 3 Shows Figure 1 A schematic diagram of the three-dimensional structure of the retired battery discharge device omitting the top wall of the box;

[0023] Figure 4 Shows Figure 1 Circuit diagram of the retired battery discharge device;

[0024] Figure 5 Shows Figure 1 Circuit diagram of another part of the retired battery discharge device.

[0025] The above drawings include the following reference numerals:

[0026] 1. Retired batteries;

[0027] 10. Box body; 11. First side wall; 12. Second side wall;

[0028] 20. Connect the port;

[0029] 30. Power-consuming components;

[0030] 40. Battery;

[0031] 50. measuring element; 51. ammeter; 52. first voltmeter; 53. second voltmeter;

[0032] 61. First circuit breaker; 62. Second circuit breaker; 63. Third circuit breaker;

[0033] 70. The first step-down transformer;

[0034] 80. Heat sink;

[0035] 90. Second step-down transformer;

[0036] 100. Three-phase switching knob. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0040] like Figures 1 to 3 As shown, the present application provides a retired battery discharge device for discharging a retired battery 1, and the retired battery discharge device comprises: a box 10, a connection port 20, a power consumption element 30, a battery 40 and a measuring element 50. The connection port 20 is arranged on the box 10 and can be used to connect the retired battery 1; the power consumption element 30 is arranged in the box 10 and can consume the residual power in the retired battery 1; the battery 40 is arranged in the box 10 and can reverse charge the retired battery 1; the measuring element 50 is arranged on the box 10 and can measure the voltage value and / or current value of the retired battery 1 during the discharge process and the voltage value and / or current value of the battery 40.

[0041] By applying the technical solution of this embodiment, the box 10 of the retired battery discharge device provides a mounting base for other components, wherein the connection port 20 is arranged on the box 10 and can be used to connect the retired battery 1, and the positive and negative electrodes of the retired battery 1 are respectively connected to the connection port 20, so as to connect the retired battery 1 to the internal circuit of the retired battery discharge device. The retired battery discharge device also includes a power consumption element 30 and a battery 40, wherein, after the retired battery 1 is connected to the internal circuit of the retired battery discharge device, the power consumption element 30 can be used to consume the residual power in the retired battery 1 to realize the discharge of the retired battery 1, and when the retired battery 1 is discharged to a certain extent, the retired battery 1 can be reversely charged by the battery 40, so that the residual power in the retired battery 1 can be completely released. In addition, the battery 40 is a movable battery, which does not need to be connected to an external power input device such as a mains when in use, so that the entire retired battery discharge device can be flexibly moved without being set at a specific location (for example, set near an external power input device), so that the use of the retired battery discharge device is more flexible and convenient, and can be used to discharge dangerous or inconveniently transported retired batteries 1. Therefore, the technical solution of this embodiment can effectively solve the problem in the related art that the voltage of the lithium-ion battery will rise after the discharge is terminated, which affects the subsequent storage, processing and other processes.

[0042] It should be noted that the above-mentioned "retired battery 1" refers to a waste battery that is no longer used. These batteries need to be recycled after being discharged. The "battery 40" in this embodiment is a removable battery, which can be a disposable battery or a rechargeable battery. Preferably, the battery 40 is a rechargeable battery.

[0043] In this embodiment, by providing a battery 40, the retired battery discharge device does not need to be connected to a power source, can be picked up and taken away, and has the advantage of being lightweight. In addition, it is a known technology that the residual power in the retired battery can be completely released by reverse charging, and its principle will not be repeated herein. In this embodiment, by using the battery 40 to reverse charge the retired battery 1, the residual power in the retired battery 1 can be completely released, which has the advantage of high discharge efficiency. This greatly reduces the fire hazard and the occurrence of casualties during the discharge process when the retired battery 1 must be transported to the designated location with power. In addition, compared with discharge methods such as feedback discharge and resistor direct discharge, the technical solution of this embodiment can achieve rapid discharge, saving about 90% of the discharge time.

[0044] In the present embodiment, the connection port 20 has a positive electrode port connected to the positive electrode of the retired battery 1 and a negative electrode port connected to the negative electrode of the retired battery 1 .

[0045] like Figure 4 and Figure 5As shown, the retired battery discharge device is provided with a discharge circuit for consuming the residual power in the retired battery 1, a reverse charging circuit for reversely charging the retired battery 1, and a charging circuit for charging the battery 40, wherein the discharge circuit, the reverse charging circuit and the charging circuit are all connected to the connection port 20, the power consumption element 30 is arranged in the discharge circuit, and the battery 40 is arranged in the reverse charging circuit and the charging circuit. Among them, the discharge circuit is provided with a power consumption element 30, so that the retired battery 1 can be discharged by connecting it to the discharge circuit; the battery 40 is arranged in the reverse charging circuit, when the retired battery 1 is discharged to a certain extent, continuing to discharge it is not very effective, and the voltage will rise after the discharge is completed, at this time, the retired battery 1 can be connected to the reverse charging circuit to reversely charge the retired battery 1, so that the electric energy in the retired battery 1 can be completely consumed; in addition, the retired battery discharge device is also provided with a charging circuit, when the power of the battery 40 is too low, the retired battery 1 can be connected to the charging circuit to charge the battery 40, so as to make full use of the electric energy in the retired battery 1.

[0046] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the discharge circuit has a first circuit breaker 61, and the first circuit breaker 61 has a first operating member exposed to the box 10; the reverse charging circuit has a second circuit breaker 62, and the second circuit breaker 62 has a second operating member exposed to the box 10; the charging circuit has a third circuit breaker 63, and the third circuit breaker 63 has a third operating member exposed to the box 10. Specifically, the first circuit breaker 61 is arranged in parallel with the connection port 20 and can control the on-off status of the connection port 20 to control whether the power consumption element 30 is connected to the heating power consumption, which can ensure the safety of the discharge circuit. When the current in the discharge circuit is too high, the first circuit breaker 61 will cut off the circuit. In addition, the first circuit breaker 61 has a first operating member exposed to the box 10. The operator can control the first circuit breaker 61 to be in a state of conducting the circuit or in a state of disconnecting the circuit through the first operating member, so that the use of the retired battery discharge device is more flexible. The working principle and use of the second circuit breaker 62 and the third circuit breaker 63 are similar to those of the first circuit breaker 61, and will not be repeated here.

[0047] like Figure 1 , Figure 3 and Figure 4As shown, the measuring element 50 includes an ammeter 51 arranged in the discharge circuit. The ammeter 51 is arranged in series with the power consumption element 30. The ammeter 51 has a first display screen, and the first display screen is exposed from the box body 10. The ammeter 51 can monitor the current during the discharge process of the retired battery 1. The operator can observe the current value of the retired battery 1 during the discharge process through the first display screen to determine when to connect the retired battery 1 to the reverse charging circuit.

[0048] like Figure 1 , Figure 3 and Figure 4 As shown, the measuring element 50 includes a first voltmeter 52, which is arranged in parallel with the retired battery 1, and has a second display screen, which is exposed from the box 10. The first voltmeter 52 can monitor the voltage of the retired battery 1 during the discharge process, and the operator can observe the voltage value of the retired battery 1 during the discharge process through the second display screen to determine when to connect the retired battery 1 to the reverse charging circuit.

[0049] Specifically, the operator can determine when to connect the retired battery 1 to the reverse charging circuit by a single voltage value, a single current value, or a combination of the voltage value and the current value.

[0050] Specifically, in this embodiment, the power consumption element 30 is a resistor with a certain resistance.

[0051] like Figure 3 and Figure 4 As shown, the discharge circuit also includes a power supply circuit arranged in parallel with the power consumption element 30, and a first step-down transformer 70 and a heat sink 80 are arranged in the power supply circuit. The first step-down transformer 70 can reduce the first voltage of the retired battery 1 to a second voltage to supply power to the heat sink 80. When the power consumption element 30 consumes the residual power in the retired battery 1, a lot of heat will be generated, which will increase the temperature inside the retired battery discharge device. By providing the heat sink 80, the temperature inside the retired battery discharge device can be effectively reduced to avoid the high temperature environment affecting the normal operation of the components in the retired battery discharge device. Among them, by providing the power supply circuit, the first voltage of the retired battery 1 can be reduced to the second voltage through the first step-down transformer 70 to supply power to the heat sink 80, and the electric energy in the retired battery 1 can be fully utilized.

[0052] Specifically, the voltage in the retired battery 1 is generally between 30V and 60V, and the first step-down transformer 70 can reduce it to 12V to power the heat sink 80. In addition, the power supply circuit can also power the ammeter 51. In this embodiment, the first voltmeter 52 is directly connected in parallel with the connection port 20 to monitor the voltage value of the retired battery 1 during discharge, that is, there is no need to additionally power the first voltmeter 52. Of course, in an embodiment not shown in the figure, a voltmeter that needs to be additionally charged can also be used as the first voltmeter, and in this case, the first voltmeter can be powered by the power supply circuit.

[0053] Preferably, the ammeter 51 and the first voltmeter 52 are both digital meters.

[0054] like Figure 3 As shown, the box body 10 includes a first side wall 11 and a second side wall 12 arranged opposite to each other, a first vent is arranged on the first side wall 11, a second vent corresponding to the first vent is arranged on the second side wall 12, a heat sink 80 is arranged at the first vent, and the power-consuming element 30 is arranged between the first vent and the second vent. By arranging the first vent, the second vent and the heat sink 80, the air inside the retired battery discharge device can flow and exchange heat with the outside to ensure the heat dissipation effect. The power-consuming element 30 is located between the first vent and the second vent, so that the heat generated by the power-consuming element 30 can be discharged to the outside of the retired battery discharge device as much as possible to avoid heat accumulation inside the retired battery discharge device.

[0055] Specifically, in this embodiment, the heat sink 80 is a heat dissipation fan.

[0056] like Figure 4 and Figure 5 As shown, the reverse charging circuit is provided with a second step-down transformer 90, which can reduce the third voltage of the battery 40 to a fourth voltage for reverse charging the retired battery 1. The voltage of the battery 40 is reduced to a voltage value suitable for reverse charging the retired battery 1 by the second step-down transformer 90, so as to ensure that the residual power in the retired battery 1 can be completely released.

[0057] Specifically, the voltage value of the battery 40 is generally between 3V and 4.2V. The second step-down transformer 90 can reduce the voltage value to about 1V to reverse charge the retired battery 1. After a certain period of reverse charging (for example, 5 minutes), the reverse charging of the retired battery 1 can be stopped, and the remaining power in the retired battery 1 is completely released.

[0058] like Figure 2 and Figure 5As shown, the measuring element 50 includes a second voltmeter 53 connected in parallel with the battery 40, and the second voltmeter 53 has a third display screen, which is exposed from the box 10. The second voltmeter 53 can monitor the voltage of the battery 40 during use, and the operator can observe the voltage of the battery 40 through the third display screen to charge the battery 40 when necessary.

[0059] like Figure 2 As shown, the battery 40 is removably inserted into the side wall of the box 10 and partially extends out of the box 10. The battery 40 is removably arranged on the box 10, which is convenient for operators to take out the battery 40 for charging. Of course, when the retired battery discharge device is in use and there is no external power input device nearby, the retired battery 1 can also be connected to the charging circuit to charge the battery 40.

[0060] like Figure 2 and Figure 5 As shown, the retired battery discharge device also includes a three-phase switching knob 100, and the three-phase switching knob 100 has a first working position, a second working position and a third working position, wherein when the three-phase switching knob 100 is in the first working position, the reverse charging circuit and the charging circuit are both disconnected; when the three-phase switching knob 100 is in the second working position, the reverse charging circuit is turned on and the charging circuit is disconnected; when the three-phase switching knob 100 is in the third working position, the charging circuit is turned on and the reverse charging circuit is disconnected. By setting the three-phase switching knob 100, it is possible to turn on one of the reverse charging circuit and the charging circuit or make both the reverse charging circuit and the charging circuit non-conductive. In specific use, the operator can judge which circuit of the reverse charging circuit and the charging circuit needs to be turned on or judge that both the reverse charging circuit and the charging circuit are not turned on according to the discharge stage of the retired battery 1 and the remaining power of the battery 40, and then switch it to the corresponding working position by operating the three-phase switching knob 100, which has the advantages of flexible and simple operation.

[0061] It should be noted that after the retired battery 1 is connected to the retired battery discharge device through the connection port 20 and the first circuit breaker 61 is turned on, the power consumption element 30 and the power supply circuit are always in working state, and as for the on-off state of the reverse charging circuit and the charging circuit, the operator needs to judge according to the discharge stage of the retired battery 1 and the remaining power of the battery 40, and then control one of the reverse charging circuit and the charging circuit to be turned on or both of the reverse charging circuit and the charging circuit to be turned off through the three-phase switching knob 100.

[0062] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0063] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0064] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0065] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A retired battery discharge device, characterized in that: include: Box body (10); A connection port (20) disposed on the housing (10) and capable of being used to connect a retired battery (1); a power consumption element (30) disposed in the housing (10) and capable of consuming residual power in the retired battery (1); A battery (40) is disposed in the box (10) and is capable of reverse charging the retired battery (1); A measuring element (50) is arranged on the box (10) and is capable of measuring the voltage value and / or current value of the retired battery (1) during the discharge process and the voltage value and / or current value of the battery (40).

2. The retired battery discharge device according to claim 1, characterized in that: The retired battery discharge device is provided with a discharge circuit for consuming the residual power in the retired battery (1), a reverse charging circuit for reversely charging the retired battery (1), and a charging circuit for charging the battery (40), wherein the discharge circuit, the reverse charging circuit and the charging circuit are all connected to the connection port (20), the power consumption element (30) is arranged in the discharge circuit, and the battery (40) is arranged in the reverse charging circuit and the charging circuit.

3. The retired battery discharge device according to claim 2, characterized in that: The discharge circuit has a first circuit breaker (61), and the first circuit breaker (61) has a first operating member exposed outside the box (10); and / or, The reverse charging circuit has a second circuit breaker (62), and the second circuit breaker (62) has a second operating member exposed outside the box (10); and / or, The charging circuit has a third circuit breaker (63), and the third circuit breaker (63) has a third operating member exposed outside the box (10).

4. The retired battery discharge device according to claim 2, characterized in that: The measuring element (50) comprises an ammeter (51) arranged in the discharge circuit, the ammeter (51) being arranged in series with the power consumption element (30), the ammeter (51) having a first display screen, the first display screen being exposed from the box (10); and / or, The measuring element (50) comprises a first voltmeter (52), the first voltmeter (52) is arranged in parallel with the retired battery (1), the first voltmeter (52) has a second display screen, and the second display screen is exposed from the box (10).

5. The retired battery discharge device according to claim 2, characterized in that: The discharge circuit further comprises a power supply circuit arranged in parallel with the power consumption element (30), wherein a first step-down transformer (70) and a heat sink (80) are arranged in the power supply circuit, and the first step-down transformer (70) can reduce the first voltage of the retired battery (1) to a second voltage to supply power to the heat sink (80).

6. The retired battery discharge device according to claim 5, characterized in that: The box body (10) comprises a first side wall (11) and a second side wall (12) which are arranged opposite to each other, the first side wall (11) is provided with a first vent, the second side wall (12) is provided with a second vent corresponding to the first vent, the heat sink (80) is arranged at the first vent, and the power consumption element (30) is arranged between the first vent and the second vent.

7. The retired battery discharge device according to claim 2, characterized in that: The reverse charging circuit is provided with a second step-down transformer (90), and the second step-down transformer (90) can reduce the third voltage of the battery (40) to a fourth voltage to perform reverse charging on the retired battery (1).

8. The retired battery discharge device according to claim 2, characterized in that: The measuring element (50) comprises a second voltmeter (53) arranged in parallel with the battery (40), the second voltmeter (53) having a third display screen, and the third display screen is exposed from the box (10).

9. The retired battery discharge device according to any one of claims 2 to 8, characterized in that: The retired battery discharge device further comprises a three-phase switching knob (100), wherein the three-phase switching knob (100) has a first working position, a second working position and a third working position, wherein: When the three-phase switching knob (100) is located at the first working position, the reverse charging circuit and the charging circuit are both disconnected; When the three-phase switching knob (100) is located at the second working position, the reverse charging circuit is turned on and the charging circuit is turned off; When the three-phase switching knob (100) is located at the third working position, the charging circuit is turned on and the reverse charging circuit is turned off.

10. The retired battery discharge device according to any one of claims 1 to 8, characterized in that: The battery (40) is removably inserted into the side wall of the box (10) and partially extends out of the box (10).

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