CN115308622A - Discharge detection device based on lithium battery - Google Patents

Abstract

The invention relates to a discharge detection device, in particular to a discharge detection device based on a lithium battery. The object of the present invention is to provide a lithium battery-based discharge detection device capable of drying the air around the lithium battery. The present invention provides such a lithium battery-based discharge detection device, which includes a casing, a battery discharge detector, a support rod, a detection rod, etc. The top and rear side of the casing are connected with a battery discharger for discharging and detecting the lithium battery. In the detector, a support rod is slidably arranged on the upper side of the rear part of the casing, the support rod is located under the battery discharge detector, and the left and right sides of the bottom of the support rod are connected with detection rods. When the detection rod of the present invention performs discharge detection on the lithium battery, the fan can blow forward to cool the lithium battery, and the desiccant can absorb the moisture in the air, thereby drying the air and avoiding the occurrence of the lithium battery due to the surrounding humid air. explode.

Description

A discharge detection device based on lithium battery

technical field

The invention relates to a discharge detection device, in particular to a discharge detection device based on a lithium battery.

Background technique

Lithium battery is a kind of battery that uses lithium metal or lithium alloy as the positive and negative electrode materials and uses non-aqueous electrolyte solution. After the lithium battery is produced, it needs to be manually sampled and tested to determine whether the product is qualified through discharge testing.

Patent application CN215494019U, publication date 20220111, discloses a discharge detection device for lithium batteries, including a box body, a detection host is arranged under the box body, a support column is arranged in the middle of the box body, and the support column A smoke alarm is set in the middle of the column, a first electric push rod is set under the partition, an upper pressing plate is connected under the first electric push rod, a fire extinguisher is set at the bottom of the box, and the fire extinguisher A pipe is connected above the top of the pipe, and the other end of the pipe is connected with a nozzle; the present invention is provided with a smoke alarm, a fire extinguisher and a first electric push rod, and the smoke alarm and the first electric push rod are electrically connected with the detection host, and the smoke alarm The device can sense a fire, transmit a signal to the detection host, activate the first electric push rod, make the upper pressing plate press the handle, spray dry powder from the nozzle, and extinguish the fire in time, which can effectively improve the safety of the device and reduce potential safety hazards. Although the above-mentioned patent can clamp the lithium battery, it cannot dry the air around the lithium battery. During the detection process, the lithium battery is likely to explode due to the humid air, and the safety is low.

To sum up, there is an urgent need for a lithium battery-based discharge detection device capable of drying the air around the lithium battery to solve the above problems.

Contents of the invention

In order to overcome the disadvantages that the existing discharge detection devices are generally unable to dry the air around the lithium battery, and the lithium battery is likely to explode due to humid air during the detection process, and the safety is low. The purpose of the present invention is to provide A lithium battery-based discharge detection device capable of drying the air around the lithium battery.

The present invention is realized through the following technical approaches:

A discharge detection device based on a lithium battery, including a casing, a battery discharge detector, a support rod, a detection rod, a placement plate, a moving assembly, a fixed assembly, a heat dissipation assembly and a moisture absorption assembly, and the top and rear side of the casing are connected usefully For the battery discharge detector for lithium battery discharge detection, the upper side of the rear part of the casing is slidingly provided with a support rod, the support rod is located below the battery discharge detector, and the left and right sides of the bottom of the support rod are connected with detection rods. The rods are electrically connected with the battery discharge detector. The front side of the lower part of the housing is slidingly provided with a placement plate for placing lithium batteries. There is a fixed assembly for clamping the lithium battery, a cooling assembly for cooling the lithium battery is provided on the lower rear of the housing, and a moisture-absorbing assembly for absorbing moisture in the air is provided on the cooling assembly.

Further, the moving assembly includes a motor, a screw mandrel, a first spring and a first connecting rod, the motor is connected to the lower rear side of the housing, the front end of the output shaft of the motor is connected to a screw mandrel, and the front part of the screw mandrel is connected to the placement plate. The lower part of the support rod is threadedly connected, the first spring is connected between the left and right sides of the bottom of the support rod and the housing, the left and right sides of the bottom of the support rod are connected with the first connecting rod, the first connecting rod is located outside the detection rod, placed The backward movement of the plate will make contact with the first link.

Further, the fixing assembly includes a first guide rod, a fixed block, an anti-skid pad, a second connecting rod and a second spring, the left and right sides of the upper part of the placing plate are connected with the first guide rods, and the outer sides of the first guide rods slide The fixed block is connected with the fixed block, the inner upper part of the fixed block is connected with the anti-skid pad, the bottom of the fixed block is connected with the second connecting rod, the first guide rod is wound with the second spring, and the two ends of the second spring are respectively placed with the The plate is connected with the fixed block, and the left and right sides of the lower part of the housing are provided with chute, and the second connecting rods on the left and right sides slide in the chute on the left and right sides respectively.

Further, the heat dissipation assembly includes a support frame, a first filter screen, a fan and a second filter screen, the support frame is connected to the lower side of the rear part of the housing, the left and right sides of the front inside the support frame are connected to fans, and the support frame The left and right sides of the inner front side are connected with a first filter screen, and the first filter screen is located at the front side of the fan, and the left and right sides of the inner front side of the support frame are connected with a second filter screen, and the second filter screen is located at the rear side of the fan.

Further, the moisture-absorbing component includes a placement frame, a desiccant, a block, a pull rod and a third spring. Both sides are slidably connected with pull rods, the inner sides of the pull rods are connected with clamping blocks, the clamping blocks block the placement frame, the pull rods are wound with third springs, and the two ends of the third springs are respectively connected with the support frame and the clamping blocks.

Further, it also includes a blocking assembly for blocking the front side of the lithium battery. The blocking assembly includes a second guide rod, a third connecting rod, a fourth spring, a baffle plate, a groove barrel and a contact rod, and the left and right sides of the housing The lower rear side of the bottom is connected with the second guide rod, and the inner side of the second guide rod is slidably connected with the third connecting rod, and the third connecting rod is slidably connected with the housing, and the second connecting rod moves backward with the third connecting rod. The rod contacts, the second guide rod is wound with a fourth spring, the two ends of the fourth spring are respectively connected with the second guide rod and the third connecting rod, and the rear upper side of the housing is connected with a baffle in a rotational manner, and the baffle Both left and right sides of the bottom are connected with grooved cylinders, and the front upper part of the third connecting rod is connected with contact rods, and the front parts of the contact rods on the left and right sides slide on the grooved cylinders on the left and right sides respectively.

Further, it also includes an alarm assembly for prompting. The alarm assembly includes a smoke alarm, a warning light and screws, and a smoke alarm is connected to the middle of the upper side of the rear of the housing. The first screw is equipped with a prompt light, which is located at the rear of the battery discharge detector, and the prompt light is electrically connected to the smoke alarm.

Further, ventilation holes are spaced apart on the placement frame.

Compared with the prior art, the present invention has the following advantages:

1. The present invention uses the motor as the driving force to drive the placement plate to move backward, thereby driving the lithium battery to move backward, and at the same time, it can drive the fixed block to move inward to clamp the lithium battery, and can drive the detection rod to move downward to detect the lithium battery. Battery discharge detection, simple operation, high degree of automation.

2. When the detection rod of the present invention detects the discharge of the lithium battery, the fan can blow air forward to cool the lithium battery, and the desiccant can absorb the moisture in the air, thereby drying the air and preventing the lithium battery from being damaged by the surrounding humidity. The air explodes.

3. When the baffle plate of the present invention is turned downward by 180 degrees, it can block the front side of the lithium battery, thereby preventing people from being injured when the lithium battery explodes.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention.

Fig. 2 is a schematic diagram of installation of the mobile assembly of the present invention.

Fig. 3 is a schematic diagram of installation of the fixing assembly of the present invention.

Fig. 4 is a schematic diagram of a partial three-dimensional structure of the fixing assembly of the present invention.

FIG. 5 is a schematic diagram of the installation of the heat dissipation assembly of the present invention.

Fig. 6 is a schematic diagram of a partial three-dimensional structure of the heat dissipation assembly of the present invention.

Fig. 7 is a schematic diagram of the installation of the moisture-absorbing component of the present invention.

Fig. 8 is a partial cross-sectional structural schematic diagram of the moisture-absorbing component of the present invention.

Fig. 9 is a schematic diagram of the installation of the blocking assembly of the present invention.

Fig. 10 is a schematic diagram of a partial three-dimensional structure of the blocking assembly of the present invention.

Fig. 11 is a schematic diagram of the installation of the alarm assembly of the present invention.

In the above drawings: 1: shell, 2: battery discharge detector, 3: support rod, 4: detection rod, 5: placing board, 6: moving component, 61: motor, 62: screw rod, 63: first Spring, 64: first connecting rod, 7: fixed assembly, 71: first guide rod, 72: fixed block, 73: anti-skid pad, 74: second connecting rod, 75: second spring, 76: chute, 8 : Cooling component, 81: Support frame, 82: First filter, 83: Fan, 84: Second filter, 9: Moisture absorption component, 91: Placement frame, 92: Desiccant, 93: Block, 94: Pull rod, 95: third spring, 10: blocking assembly, 101: second guide rod, 102: third connecting rod, 103: fourth spring, 104: baffle plate, 105: groove tube, 106: contact rod, 11: Alarm component, 111: smoke alarm, 112: warning lamp, 113: screw.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

A discharge detection device based on a lithium battery, referring to Fig. 1-Fig. Component 8 and moisture-absorbing component 9, the battery discharge detector 2 is connected to the top rear side of the housing 1, and the upper rear side of the housing 1 is slidingly provided with a support rod 3, and the support rod 3 is located under the battery discharge detector 2, The left and right sides of the bottom of the support rod 3 are connected with detection rods 4, and the detection rods 4 are electrically connected with the battery discharge detector 2. The front side of the lower part of the housing 1 is slidingly provided with a placement plate 5, and people can place the lithium battery. Placed on the placement plate 5, the backward movement of the placement plate 5 can drive the lithium battery to move backward, and at the same time can drive the detection rod 4 to move downward to contact the lithium battery, so that the lithium battery can be discharged through the battery discharge detector 2. The lower part of the body 1 is provided with a moving assembly 6, the mobile assembly 6 is provided with a fixed assembly 7, the rear lower side of the housing 1 is provided with a cooling assembly 8, and the cooling assembly 8 is provided with a moisture absorbing assembly 9.

1 and 2, the moving assembly 6 includes a motor 61, a screw mandrel 62, a first spring 63 and a first connecting rod 64, the lower rear side of the housing 1 is bolted to the motor 61, and the output shaft front end of the motor 61 is connected to Screw mandrel 62 is arranged, and the front portion of screw mandrel 62 is threadedly connected with the bottom of placing plate 5, and starting motor 61 can drive screw mandrel 62 to rotate positively and negatively, thus can drive placing plate 5 to move back and forth, and the left and right sides at the bottom of support bar 3 The first spring 63 is connected between the side and the housing 1, and the left and right sides of the bottom of the support rod 3 are welded with the first connecting rod 64. The first connecting rod 64 is located on the outside of the detection rod 4. The first link 64 makes contact.

Referring to Fig. 1, Fig. 3 and Fig. 4, the fixed assembly 7 includes a first guide rod 71, a fixed block 72, an anti-slip pad 73, a second connecting rod 74 and a second spring 75, and the left and right sides of the top of the placement plate 5 are connected There is a first guide rod 71, and the outside of the first guide rod 71 is slidably connected with a fixed block 72, and the inner upper part of the fixed block 72 is connected with a non-slip pad 73, and the fixed block 72 can clamp and fix the lithium battery by moving inwardly. The bottom of the block 72 is welded with a second connecting rod 74, the first guide rod 71 is wound with a second spring 75, the two ends of the second spring 75 are respectively connected with the placement plate 5 and the fixed block 72, and the bottom of the housing 1 Both left and right sides are provided with chute 76, and the second connecting rods 74 on the left and right sides slide in the chute 76 on the left and right sides respectively.

Referring to Fig. 1, Fig. 2, Fig. 5 and Fig. 6, the cooling assembly 8 includes a support frame 81, a first filter screen 82, a fan 83 and a second filter screen 84, and the support frame 81 is welded on the lower side of the rear part of the housing 1, The left and right sides of the front side of the support frame 81 are connected with fans 83, and the fan 83 can be started to blow air forward to cool the lithium battery. The left and right sides of the front side of the support frame 81 are connected with the first filter screen 82, A filter screen 82 is located at the front side of the fan 83 , and a second filter screen 84 is connected to the left and right sides of the inner front side of the support frame 81 , and the second filter screen 84 is located at the rear side of the fan 83 .

Referring to Fig. 2, Fig. 7 and Fig. 8, the moisture-absorbing assembly 9 includes a placement frame 91, a desiccant 92, a block 93, a pull rod 94 and a third spring 95, and the placement frame 91 is placed on the inner rear side of the support frame 81. The frame 91 is spaced with ventilation holes, and the desiccant 92 is placed at intervals in the frame 91. The desiccant 92 can absorb moisture in the air, so as to dry the air and prevent the lithium battery from exploding due to the surrounding humid air. The left and right sides of 81 rear parts are all slidably connected with pull rod 94, and the inboard of pull rod 94 is all welded with block 93, and block 93 blocks placement frame 91, and the third spring 95 is all wound on pull rod 94, and the third spring 95 The two ends of each are connected with the support frame 81 and the clamping block 93 respectively.

When people need to use the device, at first the lithium battery is placed on the top of the placement plate 5, so that the lithium battery is positioned between the two fixed blocks 72, then the motor 61 is started, the output shaft of the control motor 61 rotates forward, and the screw mandrel 62 is driven to rotate forward. Turn, the screw rod 62 drives the placement plate 5 to move backward, thereby driving the lithium battery to move backward, and the placement plate 5 drives the fixed block 72 and the second connecting rod 74 to move backward. Under the guidance of the chute 76, the housing 1 will squeeze the second connecting rod 74 to move inward, thereby driving the fixed block 72 and the anti-slip pad 73 to move inward, the second spring 75 is compressed, so that the fixed block 72 can clamp the lithium battery, and the anti-slip pad 73 can prevent the lithium battery from Clamped by the fixed block 72, when the placement plate 5 is in contact with the first connecting rod 64, it will squeeze the first connecting rod 64 to move downward, thereby driving the support rod 3 and the detection rod 4 to move downward, and the first spring 63 is compressed , so that the two detection rods 4 are in contact with the positive and negative poles of the lithium battery respectively. At this time, the motor 61 is turned off, and then the fan 83 and the battery discharge detector 2 are started. The battery discharge detector 2 can detect the discharge of the lithium battery through the detection rod 4 , and the data are displayed, people can know whether the lithium battery is qualified by watching the data, at the same time, the fan 83 can blow forward to cool down the lithium battery, and the first filter screen 82 and the second filter screen 84 can filter the air , to avoid a large amount of dust sticking to the fan 83, and the desiccant 92 can absorb the moisture in the air, so as to dry the air and prevent the lithium battery from exploding due to the surrounding humid air. After the detection is completed, turn off the fan 83 and the battery The discharge detector 2 starts the motor 61 again, controls the output shaft of the motor 61 to reverse, drives the screw mandrel 62 to reverse, and the screw mandrel 62 drives the placement plate 5 to move forward and reset, thereby driving the lithium battery that has been tested to move forward, and at the same time The placement plate 5 drives the fixed block 72 and the second connecting rod 74 to move forward and reset. When the housing 1 loosens the second connecting rod 74, the second spring 75 returns to its original state, driving the fixed block 72, the anti-skid pad 73 and the second connecting rod. The rod 74 moves outwards to reset, so that the fixed block 72 releases the lithium battery that has been tested, then turns off the motor 61, and manually removes the lithium battery that has been tested. Repeat the above operations to perform discharge testing on the lithium battery again. After 92 absorbs too much water, people can replace the desiccant 92, first pull the pull rod 94 to the outside, drive the block 93 to move to the outside, and the third spring 95 compresses, so that the block 93 is loosened and placed on the frame 91, Then the placement frame 91 can be pulled out backwards to drive the desiccant 92 to move backwards, then the pull rod 94 is released, the third spring 95 returns to its original state, and the pull rod 94 and the block 93 are driven to move inwardly to reset, and then the desiccant can be desiccant. Replace the desiccant 92. After the replacement, pull the pull rod 94 to the outside again to drive the block 93 to move to the outside. The third spring 95 is compressed, and then put the placement frame 91 back to the original position to drive the desiccant 92 to reset, and then release it. The pull rod 94 and the third spring 95 are restored to their original state, driving the pull rod 94 and the block 93 to move inwardly and reset, so that the block 93 blocks the placement frame 9 again 1.

Example 2

On the basis of Embodiment 1, with reference to Fig. 1, Fig. 9 and Fig. 10, a blocking assembly 10 is also included, and the blocking assembly 10 includes a second guide rod 101, a third connecting rod 102, a fourth spring 103, a baffle 104, the groove tube 105 and the contact rod 106, the lower rear sides of the left and right sides of the housing 1 are welded with the second guide rod 101, the inside of the second guide rod 101 is slidably connected with the third connecting rod 102, the third connecting rod 102 The rods 102 are all slidably connected to the housing 1, and the second connecting rod 74 will contact the third connecting rod 102 when it moves backwards. The second guide rod 101 is wound with a fourth spring 103, and the two ends of the fourth spring 103 are respectively connected to the The second guide rod 101 is connected with the third connecting rod 102, and the upper side of the rear part of the housing 1 is rotatably connected with a baffle 104, and the baffle 104 can block the front side of the lithium battery by rotating 180 degrees downward, so that the lithium battery can In the event of an explosion, to avoid people being injured, the left and right sides of the bottom of the baffle plate 104 are connected with a groove tube 105, and the upper front part of the third connecting rod 102 is connected with a contact rod 106, and the front parts of the contact rod 106 on the left and right sides are respectively connected to Slide on the groove tube 105 on the left and right sides.

When the second connecting rod 74 moves backward, it will contact the third connecting rod 102, thereby pressing the third connecting rod 102 to move outward, the fourth spring 103 is compressed, and the third connecting rod 102 drives the contact rod 106 to move outward Movement, the contact rod 106 drives the groove cylinder 105 to rotate 180 degrees, thereby driving the baffle plate 104 to rotate 180 degrees downward to block the front side of the lithium battery, thereby preventing people from being injured when the lithium battery explodes. When the front movement is reset, it will be separated from the third connecting rod 102, and the fourth spring 103 will return to its original state, driving the third connecting rod 102 and the contact rod 106 to move inwardly to reset, and the contact rod 106 will drive the groove tube 105 to reverse 180 degrees, thereby driving The baffle plate 104 turns upwards by 180 degrees and no longer blocks the front side of the lithium battery.

Referring to Fig. 1 and Fig. 11, an alarm assembly 11 is also included, and the alarm assembly 11 includes a smoke alarm 111, a warning light 112 and a screw 113, and a smoke alarm 111 is connected in the middle of the upper side of the rear of the casing 1, and the casing 1 A reminder light 112 is installed on the top rear side of the battery through two screws 113. The reminder light 112 is located at the rear side of the battery discharge detector 2. The reminder light 112 is electrically connected with the smoke alarm 111. When the lithium battery explodes, the smoke alarm 111 will detect smoke, and now the smoke alarm 111 will control the prompt light 112 to light up, which plays a prompting role.

When people need to use the device, they can start the smoke alarm 111, and when the lithium battery explodes, the smoke alarm 111 will detect smoke, and now the smoke alarm 111 will control the prompt light 112 to light up, thereby acting as a reminder. When the smoke alarm 111 detects no smoke, the smoke alarm 111 will control the prompt light 112 to go out, and when people do not need to use the device, just turn off the smoke alarm 111.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that The technical solution of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention.

Claims (8)

1. A discharge detection device based on a lithium battery, comprising a housing (1), a battery discharge detector (2), a support rod (3), a detection rod (4) and a placement plate (5), the housing (1 ) is connected to a battery discharge detector (2) for discharging the lithium battery, and a support rod (3) is slidingly provided on the rear upper side of the housing (1), and the support rod (3) is located on the battery Below the discharge detector (2), detection rods (4) are connected to the left and right sides of the bottom of the support rod (3), and the detection rods (4) are electrically connected to the battery discharge detector (2), and the housing (1 ) is slidingly provided with a placement plate (5) for placing lithium batteries, and is characterized in that it also includes a moving assembly (6), a fixed assembly (7), a heat dissipation assembly (8) and a moisture absorption assembly (9 ), the lower part of the casing (1) is provided with a moving assembly (6) for driving the lithium battery to move back and forth, and the moving assembly (6) is provided with a fixing assembly (7) for clamping the lithium battery, and the casing (1) The lower side of the rear part is provided with a heat dissipation assembly (8) for cooling the lithium battery, and the heat dissipation assembly (8) is provided with a moisture absorption assembly (9) for absorbing moisture in the air. 2. A discharge detection device based on a lithium battery according to claim 1, characterized in that the moving assembly (6) includes a motor (61), a screw mandrel (62), a first spring (63) and a first Connecting rod (64), the bottom rear side of housing (1) is connected with motor (61), and the output shaft front end of motor (61) is connected with screw mandrel (62), and the front part of screw mandrel (62) and placement plate ( 5) is threadedly connected at the bottom, the first spring (63) is connected between the left and right sides of the bottom of the support rod (3) and the housing (1), and the left and right sides of the bottom of the support rod (3) are connected with the first spring (63). A connecting rod (64), the first connecting rod (64) is located at the outside of the detection rod (4), and the backward movement of the placing plate (5) will contact the first connecting rod (64). 3. A discharge detection device based on a lithium battery according to claim 2, wherein the fixing assembly (7) includes a first guide rod (71), a fixing block (72), an anti-skid pad (73), The second connecting rod (74) and the second spring (75), the left and right sides of the top of the placement plate (5) are connected with the first guide rod (71), and the outside of the first guide rod (71) is slidingly connected with a fixed block (72), the inner upper part of the fixed block (72) is connected with a non-slip pad (73), the bottom of the fixed block (72) is connected with a second connecting rod (74), and the first guide rod (71) is wound There is a second spring (75), the two ends of the second spring (75) are respectively connected with the placement plate (5) and the fixed block (72), and the left and right sides of the lower part of the housing (1) are provided with chute (76) , the second connecting rod (74) on the left and right sides slides in the chute (76) on the left and right sides respectively. 4. A discharge detection device based on a lithium battery according to claim 3, characterized in that the cooling assembly (8) includes a support frame (81), a first filter screen (82), a fan (83) and a second Two filter screens (84), the rear lower side of the housing (1) is connected with a support frame (81), the left and right sides of the inside front side of the support frame (81) are all connected with fans (83), and the inside of the support frame (81) The left and right sides of the front side are connected with a first filter screen (82), the first filter screen (82) is located at the front side of the fan (83), and the left and right sides of the inner front side of the support frame (81) are connected with a second filter screen. Net (84), the second filter screen (84) is positioned at fan (83) rear side. 5. A lithium battery-based discharge detection device according to claim 4, characterized in that the moisture-absorbing assembly (9) includes a placement frame (91), a desiccant (92), a block (93), a pull rod (94) and the third spring (95), the inner rear side of the support frame (81) is placed with a placement frame (91), and the inner interval of the placement frame (91) is placed with desiccant (92), the support frame (81) rear The left and right sides of the pull rod (94) are slidingly connected with a block (93) inside the pull rod (94), and the block (93) blocks the placement frame (91), and the pull bar (94) is wound with a The third spring (95), the two ends of the third spring (95) are respectively connected with the supporting frame (81) and the clamping block (93). 6. A discharge detection device based on a lithium battery according to claim 5, characterized in that, it also includes a blocking assembly (10) for blocking the front side of the lithium battery, and the blocking assembly (10) includes a second guide rod (101), the third connecting rod (102), the fourth spring (103), the baffle (104), the groove tube (105) and the contact rod (106), the lower rear side of the left and right sides of the housing (1) Both are connected with a second guide rod (101), and the inside of the second guide rod (101) is slidably connected with a third connecting rod (102), and the third connecting rod (102) is slidably connected with the housing (1), The second connecting rod (74) moves backward and will contact the third connecting rod (102), and the second guide rod (101) is wound with a fourth spring (103), and the two ends of the fourth spring (103) are connected to the second connecting rod (103) respectively. The two guide rods (101) are connected with the third connecting rod (102), the upper rear part of the housing (1) is connected with a baffle (104) in a rotational manner, and the left and right sides of the lower part of the baffle (104) are connected with grooves Tube (105), the front side upper part of the third connecting rod (102) is all connected with contact rod (106), and the contact rod (106) front part of left and right sides slides on the groove tube (105) of left and right sides respectively. 7. The discharge detection device based on a lithium battery according to claim 6, characterized in that, it also includes an alarm assembly (11) for prompting, and the alarm assembly (11) includes a smoke alarm (111) , reminder light (112) and screw (113), the upper side of the housing (1) rear is connected with a smoke alarm (111) in the middle, and the top rear side of the housing (1) is installed with two screws (113). A reminder light (112), the reminder light (112) is located at the rear side of the battery discharge detector (2), and the reminder light (112) is electrically connected with the smoke alarm (111). 8. A discharge detection device based on a lithium battery according to claim 5, characterized in that the placement frame (91) is spaced with ventilation holes.

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