An explosion-proof fire-extinguishing device for lithium battery short-circuit testing

Abstract

The present invention belongs to the technical field of energy storage device testing in a power grid system, and particularly relates to an explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing; the equipment comprises a test host and a test box, wherein the test box is connected to the test host through a host detachment component; a battery body is placed in the test box; a base is installed inside the test box; a fire-extinguishing component and an explosion-proof component are installed on the base; the fire-extinguishing component is slidably installed on the side wall of the base; the battery body is located between the base, the fire-extinguishing component and the explosion-proof component; a trigger component is installed between the fire-extinguishing component and the battery body, and the trigger component triggers the fire-extinguishing component to start by monitoring the short-circuit test; when overheating or fire occurs during the short-circuit test, the fire-extinguishing component and the explosion-proof component cooperate to avoid the expansion of the fire and the occurrence of chain disasters.

Description

Technical Field

[0001] The invention belongs to the technical field of energy storage device testing in a power grid system, and in particular relates to an explosion-proof fire-extinguishing device for short-circuit testing of a lithium battery. Background Art

[0002] Lithium batteries play an important role in power grids and power systems, and the stability of lithium batteries also has a significant impact on the operation of the power grid. The working principle of the battery short-circuit test is mainly to generate a large current by directly short-circuiting the positive and negative poles of the battery or by introducing a conductive medium inside the battery, so as to detect the short-circuit protection function of the battery and the safety performance during short circuit.

[0003] When a lithium battery is short-circuited, the lithium battery is placed in a test box, and then connected to a cable, and then controlled by a test host to perform a short-circuit test on the lithium battery. However, when the lithium battery is short-circuited, if a fire or even an explosion occurs, the cable connection cannot be disconnected in time, and the speed at which the short circuit occurs is very fast. If it is controlled only by the host, once the control circuit of the host is damaged, the test box or the test host will be burned or even blown up. In addition, the explosion-proof box is only a separate box. When a lithium battery catches fire or explodes seriously, it cannot be effectively and promptly extinguished, which may cause damage to the explosion-proof box at the least, or even blow up the explosion-proof box in severe cases, causing more serious secondary disasters and economic losses. Summary of the invention

[0004] In view of the above problems, the present invention proposes an explosion-proof fire extinguishing device for lithium battery short circuit testing, comprising a test host and a test box, wherein the test box is connected to the test host through a host disconnection component; a battery body is placed in the test box;

[0005] A base is installed inside the test box; a fire extinguishing component and an explosion-proof component are installed on the base; the fire extinguishing component is slidably installed on the side wall of the base; the battery body is located between the base, the fire extinguishing component and the explosion-proof component;

[0006] A trigger component is installed between the fire extinguishing component and the battery body, and the trigger component triggers the fire extinguishing component to start by monitoring the short circuit test;

[0007] The explosion-proof component includes a blocking box and a linkage component. The two blocking boxes are slidably installed on the base at positions on both sides of the fire extinguishing component; one end of the linkage component is slidably installed on the blocking box, and the other end of the linkage component is rotatably installed on the fire extinguishing component; the linkage component is driven to rotate by the downward movement of the fire extinguishing component, and the linkage component drives the two blocking boxes to merge to seal the battery body, and the linkage component simultaneously drives the host to release the component and unlock it.

[0008] Furthermore, the fire extinguishing assembly comprises a main mounting frame, the main mounting frame is fixedly mounted on the side wall of the base, a lifting assembly is slidably arranged on the main mounting frame; and a fire extinguisher assembly is mounted on the lifting assembly.

[0009] Furthermore, two battery posts are provided on the side wall of the battery body, and the two battery posts are both connected to a cable body; and a trigger assembly is installed between the mounting main frame and the cable body.

[0010] Furthermore, the lifting assembly includes a lifting rod; a lifting slot is opened on the main mounting frame, and the lifting rod is slidably installed in the lifting slot; a return spring is fixedly installed inside the lifting slot, the other end of the return spring is fixedly connected to the lifting rod, and the other end of the lifting rod is connected to the fire extinguisher assembly.

[0011] Furthermore, the linkage assembly includes a rotating support rod; a support shaft is rotatably installed on the main mounting frame, the middle part of the rotating support rod is fixedly installed on the support shaft, and push-pull shafts are rotatably installed on both ends of the rotating support rod; push-pull grooves are provided on the two blocking boxes; the two push-pull shafts are respectively slidably installed in the two push-pull grooves; a rotating assembly is installed on the support shaft, the rotating assembly is movably connected to the lower pressure rod, and the lower pressure rod is fixedly connected to the fire extinguisher assembly.

[0012] Furthermore, the trigger assembly includes a heat-conducting rod, one end of which is fixedly mounted on the side wall of the mounting main frame, and the other end of which is connected to a heat-conducting wire; both cable bodies are connected to the heat-conducting wire; a baffle is provided at one end of the heat-conducting rod close to the heat-conducting wire, and the baffle is used to limit the fire extinguisher assembly.

[0013] Furthermore, the rotating assembly includes a driving gear, which is fixedly connected to the supporting shaft; a rack rack is slidably mounted on the mounting main frame, and the rack rack is meshed with the driving gear.

[0014] Furthermore, a compression groove is provided on the rack frame, and a support spring is installed in the compression groove; one end of the support spring is fixedly connected to the bottom of the compression groove, and the other end of the support spring is fixedly connected to the lower pressure rod.

[0015] Furthermore, two movable slide grooves are provided on the side wall of the base; and sliding frames are provided on the two blocking boxes, and the two sliding frames are slidably connected in the two movable slide grooves respectively.

[0016] Furthermore, two shrinkage grooves are provided on the base; support frames are respectively installed in the two shrinkage grooves; and the support frames are connected to the shrinkage grooves via a lifting spring.

[0017] Furthermore, a sliding block is installed on one side of the rack frame; the sliding block is slidably installed on the main mounting frame.

[0018] Furthermore, the fire extinguisher assembly comprises a fire extinguisher frame and a fire extinguisher body, the fire extinguisher body is plugged into the fire extinguisher frame; and a fire extinguisher pressure handle is installed on the fire extinguisher body.

[0019] Furthermore, a limiting seat is installed on the fire extinguishing frame.

[0020] Furthermore, a conductive sleeve is connected to the end of the cable body; the conductive sleeve passes through the limiting seat sleeve and is arranged on the battery column.

[0021] Furthermore, the host separation component includes a plug-in wire; the test host is connected to the plug-in wire; the test box is installed with a plug sleeve; the plug connector at the end of the plug-in wire is plugged into the plug sleeve.

[0022] Furthermore, the host disengagement assembly further comprises a locking rod and a locking sleeve; the locking rod is mounted on the test host; the locking sleeve is mounted on the test box; the locking rod is inserted into the locking sleeve;

[0023] The locking rod is provided with a plug-in slot; the test box is slidably connected with a plug-in rack, which is plugged into the plug-in slot.

[0024] Furthermore, a pop-up plate is slidably connected inside the locking sleeve, the pop-up plate is in contact with the locking rod, and a pop-up spring is installed between an end surface of the pop-up plate away from the locking rod and an inner wall of the locking sleeve.

[0025] Furthermore, a vertical moving groove is provided on the test box, and the plug-in frame is slidably installed in the vertical moving groove; the plug-in frame is in contact with the rotating support rod.

[0026] Furthermore, rollers are installed at the bottom of the test host; and a box door is installed on the test box.

[0027] The beneficial effects of the present invention compared to the prior art are as follows:

[0028] (I) The present invention transfers heat to the baffle through the heat-conducting rod when the battery body is overheated or on fire during the short-circuit test, so that the baffle is softened by heat and the fire extinguisher assembly loses its limit support and moves downward; while the fire extinguisher assembly moves downward to extinguish the fire of the battery body, it drives the blocking box to merge and seal the battery body, thereby preventing the expansion of the fire and causing chain disasters.

[0029] (ii) The present invention squeezes the support frame when the blocking box is separated; after the blocking boxes are combined, the support frame loses the squeezing and moves upward under the action of the lifting spring to support the blocking box; the sealing force of the blocking box when sealing the battery body is further improved.

[0030] (III) The present invention arranges a host detachment assembly. When an accident occurs during the battery body test, the rotating support rod drives the plug-in frame to move during the rotation process. The plug-in frame slides vertically in the vertical moving groove, so that the plug-in frame is detached from the plug-in groove. At this time, the locking rod is unlocked, and the pop-up plate is driven to move under the rebound of the pop-up spring. The pop-up plate moves to pop out the locking rod, so that the locking rod drives the test host to detach from the test box, thereby avoiding the problem of damage to the test host when an accident occurs during the battery body test.

[0031] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 The overall structural diagram of the present invention is shown.

[0034] Figure 2 The schematic diagram of the structure of the test host in the present invention is shown.

[0035] Figure 3 The schematic diagram of the structure of the test box in the present invention is shown.

[0036] Figure 4 The figure shows the internal structure schematic diagram of the test box in the present invention.

[0037] Figure 5 The schematic diagram of the structure of the fire extinguishing component and the explosion-proof component in the present invention is shown.

[0038] Figure 6 The schematic diagram of the structure of the fire extinguisher assembly and the lifting assembly in the present invention is shown.

[0039] Figure 7 The schematic diagram of the structure of the conductive sleeve cable body in the present invention is shown.

[0040] Figure 8 Shows Figure 4 A partial enlarged view of point A in the middle.

[0041] Fig. 9 A cross-sectional view showing the position of the support member in the present invention.

[0042] Fig.10 The schematic diagram of the structure of the rotating assembly in the present invention is shown.

[0043] Fig.11 A schematic diagram of the internal structure of the locking sleeve in the present invention is shown.

[0044] In the figure, 1-test host; 2-test box; 3-battery body; 4-battery column; 5-fire extinguishing assembly; 501-installation main frame; 502-fire extinguishing frame; 503-fire extinguisher body; 504-fire extinguisher pressure handle; 505-limit seat; 506-conductive sleeve; 507-heat conducting rod; 508-baffle; 509-heat conducting wire; 510-lifting slot; 511-lifting rod; 512-pull back spring; 6-explosion-proof assembly; 601-blocking box; 602-moving slide slot; 603-sliding frame; 604-rotating support rod; 605-push-pull slot; 606-push-pull shaft; 607 -Support shaft; 608-driving gear; 609-rack rack; 610-down rod; 611-compression groove; 612-support spring; 613-sliding block; 614-contraction groove; 615-support frame; 616-lifting spring; 7-host disengagement assembly; 701-plug wire; 702-plug connector; 703-plug sleeve; 704-locking rod; 705-locking sleeve; 706-pop-up plate; 707-pop-up spring; 708-plug slot; 709-vertical moving slot; 710-plug rack; 8-box door; 9-roller; 10-base; 11-cable body. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] As an important energy storage device, lithium batteries play an important role in the power grid system, especially in the fields of distributed energy, microgrids, energy storage power stations, etc. It can be said that the performance of lithium batteries directly affects their application effect and efficiency in these fields. Therefore, performance testing of lithium batteries is an important means to ensure that their performance meets the design requirements and improve the stability and reliability of the system, and has important application value in the power grid system.

[0047] The present application provides an explosion-proof fire extinguishing device for lithium battery short circuit testing, referring to Figure 1 , comprising a test host 1 and a test box 2, wherein the test box 2 is connected to the test host 1 through a host detachment component 7; Figure 5 A battery body 3 is placed in the test box 2, and two battery posts 4 are provided on the side wall of the battery body 3, and a cable body 11 is connected to the two battery posts 4;

[0048] refer to Figure 4 A base 10 is installed inside the test box 2; a fire extinguishing component 5 and an explosion-proof component 6 are installed on the base 10;

[0049] The fire extinguishing assembly 5 includes a mounting main frame 501, which is fixedly mounted on the side wall of the base 10, and a lifting assembly is slidably arranged on the mounting main frame 501; a fire extinguisher assembly is mounted on the lifting assembly; a trigger assembly is installed between the mounting main frame 501 and the cable body 11, and the trigger assembly triggers the fire extinguisher assembly to start by monitoring the short circuit test;

[0050] The explosion-proof component 6 includes a blocking box 601 and a linkage component. The two blocking boxes 601 are slidably installed on the base 10 at the positions on both sides of the fire extinguishing component 5; one end of the linkage component is slidably installed on the blocking box 601, and the other end of the linkage component is rotatably installed on the main mounting frame 501; the linkage component is driven to rotate by sliding the fire extinguisher component on the main mounting frame 501, and the linkage component drives the two blocking boxes 601 to merge and seal the battery body 3, and the linkage component drives the main unit to release the component 7 and unlock it.

[0051] The trigger assembly includes a heat-conducting rod 507, one end of which is fixedly mounted on the side wall of the mounting main frame 501, and the other end of the heat-conducting rod 507 is connected to a heat-conducting wire 509; both cable bodies 11 are connected to the heat-conducting wire 509; a baffle 508 is provided at one end of the heat-conducting rod 507 close to the heat-conducting wire 509, and the baffle 508 is used to limit the fire extinguisher assembly.

[0052] refer to Figure 6 The fire extinguisher assembly includes a fire extinguisher frame 502 and a fire extinguisher body, and the fire extinguisher body is plugged into the fire extinguisher frame 502; a fire extinguisher pressure handle 504 is installed on the fire extinguisher body.

[0053] In one embodiment of the present invention, the lifting assembly includes a lifting rod 511; a lifting slot 510 is opened on the main mounting frame 501, and the lifting rod 511 is slidably installed in the lifting slot 510; a return spring 512 is fixedly installed inside the lifting slot 510, and the other end of the return spring 512 is fixedly connected to the lifting rod 511, and the other end of the lifting rod 511 is connected to the fire extinguisher assembly.

[0054] In one embodiment of the present invention, reference Figure 8The linkage assembly includes a rotating support rod 604; a support shaft 607 is rotatably installed on the main mounting frame 501, the middle part of the rotating support rod 604 is fixedly installed on the support shaft 607, and push-pull shafts 606 are rotatably installed on both ends of the rotating support rod 604; push-pull grooves 605 are opened on the two blocking boxes 601; the two push-pull shafts 606 are respectively slidably installed in the two push-pull grooves 605; a rotating assembly is installed on the support shaft 607, and the rotating assembly is movably connected to the lower pressure rod 610, and the lower pressure rod 610 is fixedly connected to the fire extinguisher assembly.

[0055] During the implementation, when the lithium battery is short-circuited, the cable body 11 quickly heats up when the battery body 3 is short-circuited; when an unexpected situation such as overheating or fire occurs during the short-circuit test, the heat-conducting wire 509 quickly transfers a large amount of heat to the heat-conducting rod 507, so that the baffle 508 on the heat-conducting plate is softened by heat, so that the fire extinguisher assembly loses the limiting effect of the baffle 508, and the fire extinguisher assembly directly passes through the softened baffle 508; the fire extinguisher assembly moves downward under the action of the lifting assembly;

[0056] Under the pulling force of the return spring 512, the lifting rod 511 moves downward in the lifting slot 510, and the lifting rod 511 drives the fire extinguishing frame 502 to move downward synchronously; in the process of the fire extinguishing frame 502 moving downward, the fire extinguishing frame 502 drives the lower pressure rod 610 to move downward, and the lower pressure rod 610 drives the rotating assembly to rotate; the rotating assembly drives the rotating support rod 604 to rotate; one push-pull shaft 606 moves upward from the middle in the push-pull slot 605, and the other push-pull shaft 606 moves downward from the middle in the push-pull slot 605, driving the two blocking boxes 601 to move toward each other, and the blocking box 601 quickly seals the battery body 3; when the fire moves outward after the battery body 3 catches fire or the battery body 3 explodes, the fire and explosion can be blocked to avoid damage to the test box 2.

[0057] And in the process of the fire extinguishing rack 502 continuously moving downward, the two fire extinguisher bodies 503 enter the blocking box 601, and at the same time, the fire extinguisher pressure handle 504 is triggered by the squeezing of the blocking box 601, so that the fire extinguisher body 503 (which can be a model ABC-4 dry powder fire extinguisher, and the specific capacity of the fire extinguisher can be selected according to the actual use environment) can quickly spray out fire extinguishing materials to extinguish the battery body 3, thereby avoiding the expansion of the fire and causing chain disasters; at the same time, the upward moving end of the push-pull shaft 606 in the rotating support rod 604 will drive the main unit separation component 7 to unlock; thereby, the test host 1 can be separated from the test box 2 to protect the test host 1.

[0058] In the present application, when the battery body 3 is overheated or on fire during a short-circuit test, the heat is transferred to the baffle 508 through the heat-conducting rod 507, so that the baffle 508 is softened by the heat and the fire extinguisher assembly loses its limiting support and moves downward. While the fire extinguisher assembly moves downward to extinguish the fire of the battery body 3, it drives the blocking box 601 to merge and seal the battery body 3, thereby preventing the expansion of the fire and causing chain disasters.

[0059] In one embodiment of the present invention, reference Fig.10 The rotating assembly includes a driving gear 608, which is fixedly connected to the support shaft 607; a rack rack 609 is slidably mounted on the main mounting frame 501, and the rack rack 609 is meshed with the driving gear 608.

[0060] A sliding block 613 is installed on one side of the rack frame 609 ; the sliding block 613 is slidably installed on the main mounting frame 501 .

[0061] In one embodiment of the present invention, a compression groove 611 is opened on the rack frame 609, and a support spring 612 is installed in the compression groove 611; one end of the support spring 612 is fixedly connected to the bottom of the compression groove 611, and the other end of the support spring 612 is fixedly connected to the lower pressure rod 610.

[0062] During the implementation process, when the lower pressure rod 610 moves downward, the lower pressure rod 610 drives the rack frame 609 to move, and the sliding block 613 moves downward along the main mounting frame 501, and the rack frame 609 drives the gear 608 to rotate, so that the support shaft 607 drives the rotating support rod 604 to rotate, and then the two blocking boxes 601 approach each other to close the battery body 3; when the fire extinguishing frame 502 continues to move downward, the lower pressure rod 610 moves downward in the compression groove 611, so that the supporting spring 612 is compressed, and then after the blocking box 601 is closed, the fire extinguishing frame 502 can still continue to move downward.

[0063] In the embodiment of the present invention, two movable slide grooves 602 are provided on the side wall of the base 10 ; sliding frames 603 are provided on the two blocking boxes 601 , and the two sliding frames 603 are slidably connected in the two movable slide grooves 602 .

[0064] refer to Fig. 9 The base 10 is provided with two contraction grooves 614 ; support frames 615 are respectively installed in the two contraction grooves 614 ; the support frames 615 are connected to the contraction grooves 614 via a lifting spring 616 .

[0065] During the implementation process, before the blocking boxes 601 are merged, the two blocking boxes 601 are respectively located at the upper ends of the two support frames 615, and the lifting springs 616 are in a compressed state; when the rotating support rod 604 drives the blocking box 601 to move, the two sliding frames 603 move toward each other in the moving slide groove 602; when the two blocking boxes 601 are merged, the support frames 615 lose their extrusion, and under the elastic force of the lifting springs 616, the two support frames 615 move upward, against the side walls of the blocking box 601, and support the blocking box 601, so that when the battery body 3 explodes, the blocking box 601 can obtain more stable support; greater strength ensures that the blocking box 601 can seal the battery body 3 to avoid spillage of fire or explosion, and further ensure the safety of the use of the test box 2.

[0066] In one embodiment of the present invention, a limiting seat 505 is installed on the fire extinguishing frame 502 .

[0067] refer to Figure 7 The end of the connecting cable is connected with a conductive sleeve 506 ; the conductive sleeve 506 passes through the limiting seat 505 and is sleeved on the battery column 4 .

[0068] During the implementation process, the end of the cable body 11 is connected to a conductive sleeve 506, which passes through the limiting seat 505 and is sleeved on the battery column 4; the cable body 11 passes through the limiting seat 505 and is sleeved on the battery column 4 through the conductive sleeve 506, so that the cable body 11 is connected to the battery body 3, and the conductive sleeve 506 is restricted by the limiting seat 505, so that the conductive sleeve 506 can be stably connected to the battery column 4, thereby avoiding the problem of interruption of the short-circuit test due to the cable body 11 falling and losing the connection with the battery column 4.

[0069] refer to Figure 2 and Figure 3 The host separation component 7 includes a plug-in wire 701; the test host 1 is connected with the plug-in wire 701; the test box 2 is installed with a plug-in sleeve 703; the plug connector 702 at the end of the plug-in wire 701 is plugged into the plug-in sleeve 703.

[0070] In one embodiment of the present invention, the host disengagement assembly 7 further includes a locking rod 704 and a locking sleeve 705; the locking rod 704 is installed on the test host 1; the locking sleeve 705 is installed on the test box 2; the locking rod 704 is inserted into the locking sleeve 705;

[0071] The locking rod 704 is provided with a plug-in slot 708 ; the test box 2 is slidably connected with a plug-in rack 710 , which is plugged into the plug-in slot 708 .

[0072] In one embodiment of the present invention, reference Fig.11A pop-up plate 706 is slidably connected inside the locking sleeve 705 , and the pop-up plate 706 contacts the locking rod 704 . A pop-up spring 707 is installed between an end surface of the pop-up plate 706 away from the locking rod 704 and the inner wall of the locking sleeve 705 .

[0073] The test box 2 is provided with a vertical moving groove 709 , and a plug-in frame 710 is slidably installed in the vertical moving groove 709 ; the plug-in frame 710 is in contact with the rotating support rod 604 .

[0074] refer to Figure 1 A roller 9 is installed at the bottom of the test host 1; and a box door 8 is installed on the test box 2.

[0075] During the implementation process, when an accident occurs during the test of the battery body 3, during the merging process of the blocking box 601, the rotating support rod 604 rotates, and the push-pull shaft 606 at one end of the rotating support rod 604 moves upward in the push-pull groove 605, driving the plug-in frame 710 to move upward, and the plug-in frame 710 moves vertically upward in the vertical moving groove 709, so that the plug-in frame 710 is disengaged from the plug-in groove 708; thereby, the locking rod 704 is unlocked; under the rebound of the pop-up spring 707, the pop-up plate 706 is driven to move outward, and the pop-up plate 708 is disengaged. 06 Pop the locking rod 704 out of the locking sleeve 705; under the pop-up force and inertia of the pop-up plate 706, the locking rod 704 drives the test host 1 to detach from the test box 2; the test host 1 slides through multiple rollers 9; the test host 1 moves through the plug-in wire 701 to drive the plug connector 702 to detach from the plug-in sleeve 703, so that the test host 1 is completely separated from the test box 2, thereby avoiding damage to the test host 1 when an unexpected situation occurs during the test of the battery body 3, and protecting the test host 1.

[0076] The specific workflow of the present invention is as follows:

[0077] The cable body 11 passes through the limiting seat 505 through the conductive sleeve 506 and is sleeved on the battery column 4, so that the cable body 11 is connected to the battery body 3. When the battery body 3 is short-circuited, the cable body 11 quickly heats up. However, when an accident such as overheating or fire occurs during the short-circuit test, the heat-conducting wire 509 quickly transfers a large amount of heat to the heat-conducting rod 507, so that the baffle 508 is softened by heat. At this time, under the downward pulling force of the two return springs 512, the lifting rod 511 moves downward in the lifting slot 510, and the movement of the lifting rod 511 drives the fire extinguishing frame 502 to move, and the fire extinguishing frame 502 moves. When the fire extinguisher 502 is in the process of continuously moving downward, the two fire extinguisher bodies 503 are driven to enter the two blocking boxes 601, and the fire extinguisher pressure handle 504 is triggered by the squeezing of the blocking boxes 601, so that the fire extinguisher body 503 can quickly spray out the fire extinguishing material to extinguish the lithium battery, thereby avoiding the expansion of the fire and causing a chain disaster.

[0078] At the same time, after the two blocking boxes 601 are merged, the two support frames 615 are no longer squeezed. At this time, under the resilience of the two lifting springs 616, the two support frames 615 move up and support the blocking box 601, so that the battery body 3 can obtain a more stable support. Even when the explosion power of the lithium battery is large, it can still ensure that the blocking box 601 can seal the lithium battery to avoid the spillage of the fire or explosion, and further ensure the safe use of the test box 2;

[0079] At the same time, the rotating support rod 604 drives the plug-in frame 710 to move during the rotation process. The plug-in frame 710 slides vertically in the vertical moving groove 709, so that the plug-in frame 710 is disengaged from the plug-in groove 708. At this time, the locking rod 704 is unlocked, and the pop-up plate 706 is driven to move under the rebound of the pop-up spring 707. The pop-up plate 706 moves to pop out the locking rod 704, and then under the pop-up force and inertia of the pop-up plate 706, the locking rod 704 drives the test host 1 to disengage from the test box 2; the test host 1 slides through multiple rollers 9, and at the same time, the test host 1 moves through the plug-in wire 701 to drive the plug connector 702 to disengage from the plug-in sleeve 703, so that the test host 1 is completely separated from the test box 2, thereby avoiding the problem of damage to the test host 1 when an accident occurs during the test of the battery body 3.

[0080] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An explosion-proof fire-extinguishing device for lithium battery short-circuit testing, characterized in that: The test box comprises a test host (1) and a test box (2), wherein the test box (2) is connected to the test host (1) via a host detaching assembly (7); a battery body (3) is placed in the test box (2); A base (10) is installed inside the test box (2); a fire extinguishing component (5) and an explosion-proof component (6) are installed on the base (10); the fire extinguishing component (5) is slidably mounted on a side wall of the base (10); the battery body (3) is located between the base (10), the fire extinguishing component (5) and the explosion-proof component (6); A trigger component is installed between the fire extinguishing component (5) and the battery body (3), and the trigger component triggers the fire extinguishing component (5) to start by monitoring the short circuit test; The explosion-proof component (6) comprises a blocking box (601) and a linkage component. The two blocking boxes (601) are slidably mounted on the base (10) at positions on both sides of the fire extinguishing component (5). One end of the linkage component is slidably mounted on the blocking box (601), and the other end of the linkage component is rotatably mounted on the fire extinguishing component (5). The linkage component is driven to rotate by the fire extinguishing component (5) moving downward, and the linkage component drives the two blocking boxes (601) to merge and seal the battery body (3). The linkage component simultaneously drives the host separation component (7) to unlock.

2. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 1, characterized in that: The fire extinguishing assembly (5) comprises a main mounting frame (501), the main mounting frame (501) being fixedly mounted on a side wall of the base (10), a lifting assembly being slidably arranged on the main mounting frame (501), and a fire extinguisher assembly being mounted on the lifting assembly.

3. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 2, characterized in that: Two battery posts (4) are provided on the side wall of the battery body (3), and the two battery posts (4) are both connected to a cable body (11); a trigger component is installed between the main mounting frame (501) and the cable body (11).

4. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 2, characterized in that: The lifting assembly comprises a lifting rod (511); a lifting slot (510) is provided on the main mounting frame (501), and the lifting rod (511) is slidably mounted in the lifting slot (510); a pull-back spring (512) is fixedly mounted inside the lifting slot (510), the other end of the pull-back spring (512) is fixedly connected to the lifting rod (511), and the other end of the lifting rod (511) is connected to the fire extinguisher assembly.

5. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 4, characterized in that: The linkage assembly comprises a rotating support rod (604); a support shaft (607) is rotatably mounted on the mounting main frame (501); the middle portion of the rotating support rod (604) is fixedly mounted on the support shaft (607); push-pull shafts (606) are rotatably mounted on both ends of the rotating support rod (604); push-pull grooves (605) are provided on the two blocking boxes (601); the two push-pull shafts (606) are slidably mounted in the two push-pull grooves (605) respectively; a rotating assembly is mounted on the supporting shaft (607); the rotating assembly is movably connected to a lower pressure rod (610); and the lower pressure rod (610) is fixedly connected to the fire extinguisher assembly.

6. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 3, characterized in that: The trigger assembly comprises a heat-conducting rod (507), one end of the heat-conducting rod (507) is fixedly mounted on a side wall of the mounting main frame (501), and the other end of the heat-conducting rod (507) is connected to a heat-conducting wire (509); both cable bodies (11) are connected to the heat-conducting wire (509); a baffle (508) is provided at one end of the heat-conducting rod (507) close to the heat-conducting wire (509), and the baffle (508) is used to limit the position of the fire extinguisher assembly.

7. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 5, characterized in that: The rotating assembly comprises a driving gear (608), and the driving gear (608) is fixedly connected to the supporting shaft (607); a rack frame (609) is slidably mounted on the mounting main frame (501), and the rack frame (609) is meshed with the driving gear (608).

8. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 7, characterized in that: The rack frame (609) is provided with a compression groove (611), and a support spring (612) is installed in the compression groove (611); one end of the support spring (612) is fixedly connected to the bottom of the compression groove (611), and the other end of the support spring (612) is fixedly connected to the lower pressing rod (610).

9. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 6, characterized in that: The side wall of the base (10) is provided with two movable slide grooves (602); the two blocking boxes (601) are both provided with a sliding frame (603), and the two sliding frames (603) are respectively slidably connected in the two movable slide grooves (602).

10. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 9, characterized in that: Two contraction grooves (614) are provided on the base (10); support frames (615) are respectively installed in the two contraction grooves (614); and the support frames (615) are connected to the contraction grooves (614) via a lifting spring (616).

11. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 8, characterized in that: A sliding block (613) is installed on one side of the rack frame (609); the sliding block (613) is slidably installed on the main mounting frame (501).

12. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 10, characterized in that: The fire extinguisher assembly comprises a fire extinguisher frame (502) and a fire extinguisher body, wherein the fire extinguisher body is plugged into the fire extinguisher frame (502); a fire extinguisher pressure handle (504) is installed on the fire extinguisher body.

13. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 12, characterized in that: A limiting seat (505) is installed on the fire extinguishing frame (502).

14. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 13, characterized in that: The end of the cable body (11) is connected to a conductive sleeve (506); the conductive sleeve (506) passes through the limiting seat (505) and is sleeved on the battery column (4).

15. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 5, characterized in that: The host disconnection component (7) comprises a plug-in wire (701); the test host (1) is connected with the plug-in wire (701); the test box (2) is equipped with a plug-in sleeve (703); and the plug connector (702) at the end of the plug-in wire (701) is plugged into the plug-in sleeve (703).

16. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 12, characterized in that: The host disengagement assembly (7) further comprises a locking rod (704) and a locking sleeve (705); the locking rod (704) is mounted on the test host (1); the locking sleeve (705) is mounted on the test box (2); the locking rod (704) is inserted into the locking sleeve (705); The locking rod (704) is provided with a plug-in slot (708); a plug-in rack (710) is slidably connected to the test box (2), and the plug-in rack (710) is plugged into the plug-in slot (708).

17. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 16, characterized in that: A pop-up plate (706) is slidably connected inside the locking sleeve (705), the pop-up plate (706) is in contact with the locking rod (704), and a pop-up spring (707) is installed between an end surface of the pop-up plate (706) away from the locking rod (704) and the inner wall of the locking sleeve (705).

18. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 12, characterized in that: The test box (2) is provided with a vertical moving groove (709), and the plug-in frame (710) is slidably installed in the vertical moving groove (709); the plug-in frame (710) is in contact with the rotating support rod (604).

19. The explosion-proof fire-extinguishing equipment for lithium battery short-circuit testing according to claim 12, characterized in that: The bottom of the test host (1) is provided with a roller (9); and the test box (2) is provided with a box door (8).

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