A power battery charging and discharging test device

Abstract

This invention relates to a battery testing safety device, specifically a power battery charge and discharge testing device, comprising a mounting frame and a test chamber movably mounted on the mounting frame via a movable structure. A distribution box is fixedly mounted at the bottom of the mounting frame, and power supply components for transmitting power to the interior of the test chamber are respectively mounted on both sides of the mounting frame. The power supply components are connected to the distribution box via a power-off protection component. The movable structure and the balancing structure work together to allow the test chamber to swing horizontally and elastically on the mounting frame. The synchronized structure, the power supply components, and the lifting mechanism work together to connect the power supply components to the power lithium battery placed in the test chamber when the door is closed; and to disconnect the power supply components from the power lithium battery when the door is opened, providing power protection. In the event of an overcharge test explosion, the power-off protection component disconnects the power supply components from the distribution box by shaking the test chamber, preventing leakage and improving the safety of the test.

Description

Technical Field

[0001] This invention relates to a battery testing safety device, specifically a power battery charge and discharge testing device. Background Technology

[0002] The automotive industry is developing rapidly, with production and sales constantly achieving new breakthroughs. At the same time, the fuel crisis and environmental pollution problems are also intensifying. Therefore, vigorously developing new energy vehicles, replacing oil with electricity, and reducing pollutant emissions has become the direction for the development of the global automotive industry.

[0003] As the power source for new energy vehicles, the performance of batteries directly determines the driving range and quality of these vehicles. Under the premise of ensuring safe use, testing battery performance, such as lifespan at different temperatures and degradation after multiple charge-discharge cycles, is crucial.

[0004] In addition to voltage limits, current limits are also necessary when charging power lithium batteries. When the current is too high, lithium ions do not have time to enter the battery and will accumulate on the surface of the material. After these lithium ions gain electrons, they will form lithium atom crystals on the surface of the material. When overcharging reaches its limit, the battery box will rupture and explode.

[0005] The prior art discloses an explosion-proof device for power battery charging and discharging tests (application number CN201710188373.X). When the power battery explodes and burns, smoke is generated inside the device. At the same time, the exploded or burning power battery releases harmful gases. At this time, the smoke sensor detects the smoke signal and feeds it back to the control component. The harmful gas sensor detects the harmful gas signal and feeds it back to the control component. Based on the signals fed back by the smoke sensor and the harmful gas sensor, the control component controls the power switch of the test chamber to disconnect the power supply in the test chamber, so as to prevent the power battery explosion from affecting the entire test chamber.

[0006] However, explosions inevitably interfere with the accuracy of smoke and hazardous gas sensors, and may even damage them. Therefore, it is necessary to develop a mechanical explosion-proof control structure to achieve the power-off function during an explosion. Summary of the Invention

[0007] The purpose of this invention is to provide a power battery charging and discharging test device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A power battery charging and discharging test device includes a mounting frame and a test chamber that is movably mounted on the mounting frame via a movable structure. The test chamber can move horizontally along the length of the mounting frame via the movable structure.

[0010] A distribution box is fixedly installed at the bottom of the mounting frame, and a switch button is installed on the back of the distribution box. Power supply components for transmitting power to the test chamber are installed on both sides of the mounting frame. The power supply components are connected to the distribution box through a power-off protection component, which is also compatible with the test chamber. If the test chamber experiences horizontal vibration during the power supply process, the power-off protection component will disconnect the connection between the power supply components and the distribution box.

[0011] A set of balancing structures is installed on each side of the mounting frame. The balancing structures on both sides provide horizontal elastic support to the test chamber from both sides to ensure that the test chamber is in the middle position of the mounting frame under natural conditions.

[0012] The invention further defines the following: the mounting frame is a rectangular frame, and multiple trusses are installed at equal intervals along its length inside the mounting frame. The movable structure includes a sleeper rail fixed on the truss and perpendicular to the truss, a slide groove opened on the upper part of the sleeper rail along its length, and a support member for connecting the slide groove and the test chamber.

[0013] The lower part of the support is provided with a locking part that fits into the slide groove. Roller rails are provided at both the upper and lower parts of the slide groove. Multiple balls are rolled on the roller rails. The locking part rolls and fits against the upper and lower balls. The test chamber is installed on the support by bolts.

[0014] The present invention further specifies the following: the front of the test chamber has an opening for placing the power lithium battery to be tested inside it, a liftable sealing door is provided at the opening, a sealing part is provided around the sealing door, a fixing member is fixed on the upper part of the sealing part, and the fixing member is connected to a lifting mechanism provided on the top of the test chamber.

[0015] The lifting mechanism, in conjunction with the fixing components, can drive the sealing part and the sealing door to close the opening.

[0016] The present invention further defines the following: the balancing structure includes a transverse assembly fixed horizontally on the truss and facing the test chamber, a stabilizing member slidably fitted with the transverse assembly, a first compression spring disposed in the transverse assembly and connected to the stabilizing member, and a fitting member fixed to one end of the stabilizing member facing the test chamber.

[0017] The fitting component remains in contact with the side wall of the test chamber.

[0018] The present invention further defines the following: the power supply assembly includes a flat plate fixed on the mounting bracket, a seat cylinder mounted on the flat plate and parallel to the transverse assembly, a relief rod slidably fitted with the seat cylinder, a conductive connector fixed to the end of the relief rod away from the seat cylinder, and a second compression spring elastically connecting the relief rod and the seat cylinder.

[0019] A needle threader is installed on each side of the test chamber. Two electrical receiving needles that pass through the needle threader are fixed at the end of the conductive connector. The conductive connector is connected to the lifting mechanism through a synchronous structure.

[0020] In the synchronous structure, when the lifting mechanism drives the sealing door to seal the opening, the conductive connector allows the receiving needle to pass through the needle inserter and be inserted into both ends of the power lithium battery.

[0021] The invention further specifies the following: the lifting mechanism includes a top component fixed above the test chamber by a vertical member, a lead screw rotatably installed between the top component and the test chamber, and a lifting sleeve fixed to a fixing member and threadedly connected to the lead screw.

[0022] There are two lead screws with the same thread direction, and they are connected by a transmission component. A wheel is fixed to the upper end of one of the lead screws.

[0023] The present invention further defines the following: the synchronization structure includes an extension of the fixing member that is fixed by bolts, a receiving member fixed to the extension member, a pulley rotatably installed at the lower end of the receiving member, and a push plate fixed to one side of the lever and in contact with the pulley.

[0024] The lower part of one side of the push plate has an "S"-shaped smooth transition section, and the pulley fits into the smooth transition section.

[0025] The present invention further specifies the following: the power failure protection assembly consists of two sets, including a toothed plate fixed to the bottom of the test chamber, a swing tooth oscillating below the toothed plate, a guide rod fixed between two trusses and parallel to the sleeper rail, a locking block slidably mounted on the guide rod and cooperating with the swing tooth, and a plug rod fixed below the locking block.

[0026] The toothed plate has a stroke groove, and the swing tooth is rotatably installed in the stroke groove. The upper surface of the locking block is provided with teeth that match the swing tooth. Under the action of the teeth, the swing tooth in the stroke groove can swing away from the test chamber.

[0027] One end of the power pole is equipped with a contact that plugs into the distribution box, and the power pole is electrically connected to the conductive connector via a wire.

[0028] The present invention further specifies that: two slide rails are fixed inside the test chamber, the slide rails are parallel to the truss, and a slide frame is slidably arranged on each slide rail, and a support plate for placing the power lithium battery is fixed between the two slide frames.

[0029] A limiting component is fixed between the two carriages. The limiting component is far from the opening. A stop component is fixed on the test chamber near the opening to cooperate with the limiting component.

[0030] Compared with the prior art, the beneficial effects of the present invention are: the present invention enables the test chamber to swing horizontally and elastically on the mounting frame through the cooperation of the movable structure and the balancing structure;

[0031] The synchronized structure, power supply components, and lifting mechanism work together to connect the power supply components to the power lithium battery placed in the test chamber when the door is closed; and automatically disconnect the power supply components from the power lithium battery when the door is opened, thus providing power protection.

[0032] Furthermore, in the event of an explosion during an overcharge test, the power-off protection component in this invention automatically disconnects the power supply component from the distribution box due to the shaking of the test chamber, forming an open circuit and preventing leakage, thus further improving the safety of the test. Attached Figure Description

[0033] Figure 1 A schematic diagram of the structure of a power battery charge and discharge test device.

[0034] Figure 2 This is a schematic diagram of the moving structure in the power battery charge and discharge test device.

[0035] Figure 3 A schematic diagram of the side-tilt structure of the power battery charging and discharging test device.

[0036] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0037] Figure 5 This is a schematic diagram of the structure of the power battery charge and discharge test device after the test chamber and support components have been separated.

[0038] Figure 6 A schematic diagram of the structure of the power battery charging and discharging test device after the lifting mechanism drives the sealing door to open the opening.

[0039] Figure 7 for Figure 6 A structural diagram from another perspective.

[0040] Figure 8 This is a schematic diagram of the installation structure of the locking block, guide rod, and plug rod relative to the truss in the power battery charging and discharging test device.

[0041] Figure 9 This is a schematic diagram of the engaging part and the sliding groove in the power battery charging and discharging test device.

[0042] Figure 10 This is a partial disassembly diagram of the balance structure and power transmission components in the power battery charge and discharge test device.

[0043] Figure 11 for Figure 10A magnified view of a section at point B.

[0044] Figure 12 A schematic diagram of the structure of the power battery charge and discharge test device after the mounting frame and truss have been removed.

[0045] Figure 13 for Figure 12 A magnified view of a section at point C.

[0046] Figure 14 for Figure 12 A structural diagram from a tilting perspective.

[0047] Figure 15 for Figure 14 A magnified view of a section at point D.

[0048] In the picture:

[0049] 100 - Mounting bracket;

[0050] 200-truss;

[0051] 300-Sleeper rail; 301-Slide groove; 302-Roller rail; 303-Ball bearing;

[0052] 400 - Support component; 401 - Engaging part;

[0053] 500 - Test chamber body; 501 - Support plate; 502 - Slide carriage; 503 - Slide rail; 504 - Stop; 505 - Limiting component;

[0054] 600-Door sealing; 601-Sealing part; 602-Fixing component; 603-Lifting sleeve; 604-Screw rod; 605-Top component; 606-Vertical component; 607-Transmission component; 608-Roller; 609-Extension component;

[0055] 700 - Lateral assembly; 701 - First compression spring; 702 - Stabilizer; 703 - Fitting assembly;

[0056] 800-Receiving part; 801-Pulley; 802-Push plate; 803-Leaning rod; 804-Conductive connector; 805-Electrical needle; 806-Needle threader; 807-Second compression spring; 808-Seat cylinder; 809-Plate part;

[0057] 900-tooth plate; 901-swing tooth; 902-locking block; 903-guide rod; 904-plug pole; 905-distribution box; 906-wire. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0060] Please see Figures 1-15 As an embodiment of the present invention, a power battery charging and discharging test device includes a mounting frame 100 and a test chamber 500 movably mounted on the mounting frame 100 via a movable structure. The test chamber 500 can move horizontally along the length direction of the mounting frame 100 via the movable structure.

[0061] A distribution box 905 is fixedly installed at the bottom of the mounting bracket 100. A switch button is installed on the back of the distribution box 905. Power supply components for supplying power to the test chamber 500 are respectively installed on both sides of the mounting bracket 100. The power supply components are connected to the distribution box 905 through a power-off protection component, and the power-off protection component cooperates with the test chamber 500. If the test chamber 500 experiences horizontal vibration during the process of the power supply components supplying power to the test chamber 500, the power-off protection component will disconnect the connection between the power supply components and the distribution box 905.

[0062] A set of balancing structures is provided on each side of the mounting frame 100. The balancing structures on both sides provide horizontal elastic support to the test chamber 500 from both sides to ensure that the test chamber 500 is in the middle position of the mounting frame 100 in a natural state.

[0063] Among them, the test chamber 500 is an explosion-proof chamber, which can withstand the internal explosion pressure without being damaged.

[0064] In this embodiment, the power lithium battery to be tested is placed in the test chamber 500, and the test chamber 500 is kept in the middle position of the mounting frame 100 by the balance structure. The power failure protection component is adjusted to connect the power supply component and the distribution box 905. Then the power supply component is connected to the power lithium battery placed in the test chamber 500. The switch button is turned on to start the overcharge test. When the current is too large, the lithium ions will not have time to enter the battery and will accumulate on the surface of the material. After these lithium ions gain electrons, they will generate lithium atom crystals on the surface of the material. When the battery reaches the limit of its tolerance, the battery box will break and explode. The vibration generated by the explosion will drive the test chamber 500 to shake horizontally. When the test chamber 500 shakes, it will drive the power failure protection component to act and disconnect the electrical connection between the power supply component and the distribution box 905.

[0065] In this invention, a power-off protection component is set up to automatically cut off the power to the charging part of the power lithium battery at the moment it reaches the overcharge limit and explodes, so as to prevent leakage.

[0066] As another embodiment of the present invention, the mounting frame 100 is a rectangular frame, and a plurality of trusses 200 are installed at equal intervals along its length direction inside the mounting frame 100. The movable structure includes a sleeper rail 300 fixed on the truss 200 and perpendicular to the truss 200, a slide groove 301 opened on the upper part of the sleeper rail 300 along its length direction, and a support member 400 for connecting the slide groove 301 and the test chamber 500.

[0067] The lower part of the support member 400 is provided with a locking part 401 that fits into the slide groove 301. Roller rails 302 are provided at both the upper and lower parts of the slide groove 301. Multiple balls 303 are rolled on the roller rails 302. The locking part 401 rolls and fits against the upper and lower balls 303. The test chamber 500 is installed on the support member 400 by bolts.

[0068] In this embodiment, by setting the sleeper rail 300 and the slide groove 301 thereon, the support member 400 can move along the length direction of the mounting frame 100, thereby allowing the test chamber 500 to move along the length direction of the mounting frame 100.

[0069] With the help of the ball bearing 303 and the engaging part 401, on the one hand, the support 400 and the test chamber 500 can be prevented from detaching from the sleeper rail 300, and on the other hand, the friction between the support 400 and the sleeper rail 300 can be reduced.

[0070] As another embodiment of the present invention, the front of the test chamber 500 is provided with an opening for the power lithium battery to be tested to be placed inside it. A liftable sealing door 600 is provided at the opening. A sealing part 601 is provided around the sealing door 600. A fixing member 602 is fixed on the upper part of the sealing part 601. The fixing member 602 is connected to a lifting mechanism provided on the top of the test chamber 500.

[0071] The lifting mechanism, in conjunction with the fixing component 602, can drive the sealing part 601 and the sealing door 600 to close the opening.

[0072] In this embodiment, after the power lithium battery to be tested is placed into the test chamber 500, the lifting mechanism drives the fixing part 602 to drive the sealing door 600 and the sealing part 601 around it to seal the opening, so as to prevent outside air from rushing into the test chamber 500 and burning when the battery explodes.

[0073] The sealing part 601 can be made of a flexible hard rubber material. Since the sealing part 601 made of rubber material is set around the sealing door 600, the sealing door 600 can be completely closed with the opening.

[0074] As another embodiment of the present invention, the balancing structure includes a transverse assembly 700 that is horizontally fixed on the truss 200 and faces the test chamber 500, a stabilizing member 702 that is slidably fitted with the transverse assembly 700, a first compression spring 701 disposed in the transverse assembly 700 and connected to the stabilizing member 702, and a fitting member 703 fixed to one end of the stabilizing member 702 facing the test chamber 500.

[0075] The bonding component 703 is kept in contact with the side wall of the test chamber 500.

[0076] In this embodiment, since there are two sets of balancing structures, which are respectively set on both sides of the test chamber 500, the two sets of balancing structures can keep the test chamber 500 in the middle position of the mounting component 100 in its natural state.

[0077] In addition, since the stabilizing member 702 is elastically connected to the transverse component 700 through the first compression spring 701, when an explosion occurs inside the test chamber 500, the impact force generated by the explosion is biased to one side. The stabilizing member 702 can further compress the first compression spring 701 on the side biased to the impact force, ultimately causing the test chamber 500 to shake.

[0078] It should be noted that the first compression spring 701 can absorb the impact force generated when the battery explodes, thus buffering the test chamber 500. In addition, the explosion caused by the overcharge of the battery is directed in all directions. Specifically, the impact force along the length of the mounting bracket 100 can be divided into impact forces on both sides. However, the impact forces on both sides cannot be completely equal. Therefore, the resultant force of the two must be directed in one direction, thus causing the test chamber 500 to shake.

[0079] As another embodiment of the present invention, the power supply assembly includes a flat plate 809 fixed on the mounting bracket 100, a seat 808 mounted on the flat plate 809 and parallel to the transverse sleeve 700, a relief rod 803 slidably fitted with the seat 808, a conductive connector 804 fixed to one end of the relief rod 803 away from the seat 808, and a second compression spring 807 elastically connecting the relief rod 803 and the seat 808.

[0080] A needle threader 806 is installed on each side of the test chamber 500. Two electrical receiving needles 805 that pass through the needle threader 806 are fixed at the end of the conductive connector 804. The conductive connector 804 is connected to the lifting mechanism through a synchronous structure.

[0081] When the lifting mechanism drives the sealing door 600 to seal the opening, the synchronous structure allows the connecting needle 805 to pass through the needle inserter 806 and be inserted into both ends of the power lithium battery via the conductive connector 804.

[0082] In this embodiment, due to the synchronous structure, when the lifting mechanism drives the sealing door 600 to close, the power supply component can be automatically connected to the power lithium battery placed in the test chamber 500; conversely, when the sealing door 600 is opened, the synchronous structure can automatically disconnect the power supply component from the power lithium battery, increasing the safety of the device.

[0083] As another embodiment of the present invention, the lifting mechanism includes a top component 605 fixed above the test chamber 500 by a vertical member 606, a lead screw 604 rotatably installed between the top component 605 and the test chamber 500, and a lifting sleeve 603 fixed on the fixing member 602 and threadedly connected to the lead screw 604.

[0084] There are two lead screws 604, and the threads of the two lead screws 604 are in the same direction. They are connected by a transmission component 607. A wheel 608 is fixed to the upper end of one of the lead screws 604.

[0085] In this embodiment, the rotating wheel 608 drives one of the lead screws 604 to rotate. The rotating lead screw 604 drives the other lead screw 604 to rotate in the same direction through the transmission component 607. Finally, in conjunction with the lifting sleeve 603, the fixing component 602 is driven to rise and fall, thereby realizing the control of the opening and closing of the sealing part 601 and the sealing door 600. Moreover, the threaded transmission has the dual functions of saving effort and self-locking, ensuring that the sealing part 601 can tightly seal the opening.

[0086] As another embodiment of the present invention, the synchronization structure includes an extension 609 that is fixed to the fixing member 602 by bolts, a receiving member 800 fixed to the extension member 609, a pulley 801 rotatably installed at the lower end of the receiving member 800, and a push plate 802 fixed to one side of the push rod 803 and in contact with the pulley 801.

[0087] The lower part of one side of the push plate 802 has an "S"-shaped smooth transition section, and the pulley 801 fits into the smooth transition section.

[0088] In this embodiment, when the fixing member 602 rises to open the opening, the fixing member 602 drives the extension member 609 and the receiving member 800 to rise together. The receiving member 800 drives the pulley 801 to rise. The pulley 801 drives the push plate 802 to move away from the test chamber 500 by means of the smooth transition part, thereby driving the push rod 803, the conductive connector 804 and the electrical needle 805 to move away from the test chamber 500. The electrical needle 805 separates from the power lithium battery in the test chamber 500 to achieve power disconnection.

[0089] As the fixing member 602 descends to close the opening, it drives the extension member 609 and the receiving member 800 to descend together. When the sealing door 600 is about to close the opening, the pulley 801 descends to the smooth transition part. Then the fixing member 602 continues to descend to completely seal the opening. The pulley 801 descends together with the fixing member 602, the extension member 609, and the receiving member 800. At this time, under the elastic force of the second compression spring 807, the push rod 803, the conductive connector 804, and the electrical needle 805 are automatically pushed to move towards the side closer to the test chamber 500. The electrical needle 805 connects with the power lithium battery inside the test chamber 500 to realize power supply.

[0090] In another embodiment of the present invention, the power failure protection assembly consists of two sets, including a toothed plate 900 fixed to the bottom of the test chamber 500, a swing tooth 901 swinging below the toothed plate 900, a guide rod 903 fixed between two trusses 200 and parallel to the sleeper rail 300, a locking block 902 slidably disposed on the guide rod 903 and cooperating with the swing tooth 901, and a plug rod 904 fixed below the locking block 902.

[0091] The toothed plate 900 has a stroke groove, the swing tooth 901 is rotatably installed in the stroke groove, and the upper surface of the locking block 902 is provided with teeth that match the swing tooth 901. Under the action of the teeth, the swing tooth 901 in the stroke groove can swing away from the test chamber 500.

[0092] One end of the plug pole 904 is equipped with a contact that is plugged into the distribution box 905, and the plug pole 904 is electrically connected to the conductive connector 804 through the wire 906.

[0093] In this embodiment, the distribution box 905 is connected to the power grid via an external cable. Current flows out from one side of the contact, enters the conductive connector 804 on the same side via the conductor 906 on the same side, and flows into one pole of the power lithium battery through the receiving pin 805 on that side; then it flows out from the other pole through the receiving pin 805 on the other side, and flows back into the distribution box 905 through the conductive connector 804 and the contact of one pole of the conductor 906 on the other side.

[0094] When the battery explodes due to overcharging, the test chamber 500 shakes to one side. The test chamber 500 drives the toothed plate 900 and the swing tooth 901 to shake as well. The swing tooth 901 on the same side as the shaking engages with the teeth on the locking block 902 on that side, causing the locking block 902 to move to the shaking side, thereby separating the plug rod 904 and contacts on that side from the distribution box 905.

[0095] The swing tooth 901 on the other side can swing away from the test chamber 500 due to the setting of the stroke groove, so it will not drive the plug rod 904 and the contact on the other side to move further closer to the distribution box 905, thus preventing them from damaging the distribution box 905.

[0096] In this invention, since a set of power-off protection components are provided on each side, regardless of whether the test chamber 500 moves in the forward or reverse direction along the length of the mounting frame 100, one of the power supply components can be disconnected from the distribution box 905, so that an open circuit is formed between the distribution box 905 and the battery, and no leakage will occur.

[0097] As another embodiment of the present invention, two slide rails 503 are fixed inside the test chamber 500. The slide rails 503 are parallel to the truss 200, and a slide frame 502 is slidably arranged on each slide rail 503. A support plate 501 for placing the power lithium battery is fixed between the two slide frames 502.

[0098] A limiting member 505 is fixed between the two carriages 502. The limiting member 505 is away from the opening. A stop member 504 is fixed on the test chamber 500 near the opening to cooperate with the limiting member 505.

[0099] In this embodiment, the slide 502 and slide rail 503 allow the support plate 501 to slide out of the test chamber 500, facilitating the placement of the power lithium battery to be tested on the support plate 501. After the power lithium battery is placed on the support plate 501, the slide 502 is slid in the opposite direction until its rear end abuts against the rear wall of the test chamber 500. By closing the sealing door 600, the front end of the slide 502 abuts against the sealing door 600, thus keeping the support plate 501 stably placed inside the test chamber 500.

[0100] The use of limiter 505 and stopper 504 can effectively prevent the carriage 502 from sliding out of the slide rail 503 completely, causing the support plate 501 to separate from the test chamber 500.

[0101] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0102] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power battery charge-discharge test device, comprising a mounting frame (100), characterized in that, It also includes a test chamber (500) mounted on the mounting frame (100) via a movable structure, the test chamber (500) being horizontally movable along the length of the mounting frame (100); A distribution box (905) is fixedly installed at the bottom of the mounting frame (100). Power supply components for supplying power to the test chamber (500) are respectively installed on both sides of the mounting frame (100). The power supply components are connected to the distribution box (905) through a power-off protection component, and the power-off protection component cooperates with the test chamber (500). If the test chamber (500) experiences horizontal vibration during the process of the power supply components supplying power to the test chamber (500), the power-off protection component can disconnect the connection between the power supply components and the distribution box (905). A set of balancing structures is provided on each side of the mounting bracket (100), and the balancing structures on both sides provide horizontal elastic support to the test chamber (500) from both sides respectively. The mounting frame (100) is rectangular in shape. Multiple trusses (200) are installed at equal intervals along the length of the mounting frame (100). The movable structure includes a sleeper rail (300) fixed on the truss (200) and perpendicular to the truss (200), a slide groove (301) opened on the upper part of the sleeper rail (300) along the length of the sleeper rail (300), and a support member (400) for connecting the slide groove (301) and the test chamber (500). The lower part of the support member (400) is provided with a locking part (401) that fits into the slide groove (301). Roller rails (302) are provided at both the upper and lower parts of the slide groove (301). Multiple balls (303) are rolled on the roller rails (302). The locking part (401) rolls and fits against the balls (303) at the upper and lower parts. The test chamber (500) is installed on the support member (400) by bolts. The test chamber (500) has an opening at the front for placing the power lithium battery to be tested inside. The power failure protection assembly consists of two sets, including a toothed plate (900) fixed at the bottom of the test chamber (500), a swing tooth (901) swinging below the toothed plate (900), a guide rod (903) fixed between two of the trusses (200) and parallel to the sleeper rail (300), a locking block (902) slidably disposed on the guide rod (903) and cooperating with the swing tooth (901), and a plug rod (904) fixed below the locking block (902). The toothed plate (900) is provided with a stroke groove, the swing tooth (901) is rotatably installed in the stroke groove, and the upper surface of the locking block (902) is provided with teeth that match the swing tooth (901). The swing tooth (901) in the stroke groove can swing away from the test chamber (500) under the action of the teeth. One end of the plug rod (904) is equipped with a contact that is plugged into the distribution box (905), and the plug rod (904) is electrically connected to the conductive connector (804) through a wire (906); The test chamber (500) has two slide rails (503) fixed inside. The slide rails (503) are parallel to the truss (200), and each slide rail (503) has a slide frame (502) slidably mounted on it. A support plate (501) for placing the power lithium battery is fixed between the two slide frames (502). A limiting member (505) is also fixed between the two carriages (502), the limiting member (505) being away from the opening, and a stop member (504) for cooperating with the limiting member (505) is fixed on the test chamber (500) near the opening.

2. The power battery charge and discharge test device according to claim 1, characterized in that, A liftable sealing door (600) is provided at the opening. A sealing part (601) is provided around the sealing door (600). A fixing part (602) is fixed on the upper part of the sealing part (601). The fixing part (602) is connected to a lifting mechanism provided on the top of the test chamber (500). The lifting mechanism, in conjunction with the fixing member (602), can drive the sealing part (601) and the sealing door (600) to close the opening.

3. The power battery charge and discharge test device according to claim 2, characterized in that, The balancing structure includes a transverse assembly (700) horizontally fixed to the truss (200) and facing the test chamber (500), a stabilizing member (702) slidably fitted with the transverse assembly (700), a first compression spring (701) disposed in the transverse assembly (700) and connected to the stabilizing member (702), and a fitting member (703) fixed to one end of the stabilizing member (702) facing the test chamber (500). The bonding component (703) remains in contact with the side wall of the test chamber (500).

4. The power battery charge / discharge test device according to claim 3, characterized in that, The power supply assembly includes a flat plate (809) fixed on the mounting bracket (100), a seat (808) mounted on the flat plate (809) and parallel to the transverse assembly (700), a relief rod (803) slidably fitted with the seat (808), a conductive connector (804) fixed to one end of the relief rod (803) away from the seat (808), and a second compression spring (807) elastically connecting the relief rod (803) and the seat (808). A needle threader (806) is provided on each side of the test chamber (500). Two electrical receiving needles (805) passing through the needle threader (806) are fixed at the end of the conductive connector (804). The conductive connector (804) is connected to the lifting mechanism through a synchronous structure. When the lifting mechanism drives the sealing door (600) to seal the opening, the synchronous structure allows the electrode needle (805) to pass through the needle inserter (806) and be inserted into both ends of the power lithium battery via the conductive connector (804).

5. The power battery charge / discharge test device according to claim 2, characterized in that, The lifting mechanism includes a top component (605) fixed above the test chamber (500) by a vertical member (606), a lead screw (604) rotatably installed between the top component (605) and the test chamber (500), and a lifting sleeve (603) fixed to the fixing member (602) and threadedly connected to the lead screw (604). There are two lead screws (604), the two lead screws (604) have the same thread direction and are connected by a transmission component (607). A wheel (608) is fixed at the upper end of one of the lead screws (604).

6. The power battery charge / discharge test device according to claim 4, characterized in that, The synchronization structure includes an extension (609) that is fixed to the fixing member (602) by bolts, a receiving member (800) fixed to the extension member (609), a pulley (801) rotatably installed at the lower end of the receiving member (800), and a push plate (802) fixed to one side of the push rod (803) and in contact with the pulley (801). The lower part of one side of the push plate (802) has an "S"-shaped smooth transition section, and the pulley (801) is in contact with the smooth transition section.

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