A device for testing charge and discharge performance of an energy storage battery

Abstract

The application belongs to the technical field of energy storage battery charging and discharging test, in particular to an energy storage battery charging and discharging performance test device, which comprises a box body, the inside cavity of the box body is divided into a heat dissipation cavity and a test cavity by a partition seat, and a baffle and a control unit are arranged on one side of the heat dissipation cavity; further comprising: a plurality of switching assemblies, each switching assembly comprises a fixed box fixedly connected to one side of the baffle; in the application, the electric push rod drives the insulating slide plate to synchronously drive the first conductive block and the second conductive block to move, so as to simultaneously connect and disconnect the positive and negative electrode loops, thereby avoiding the circuit impact caused by the time sequence deviation, significantly improving the safety of the test device and the energy storage battery, and the electric push rod drives the conductive block assembly to continuously move, first disconnecting the charging loop and then connecting the discharging loop, or vice versa, the switching process is clear in logic and reliable in action, manual rewiring is not required, and the test efficiency and operation convenience are improved.

Description

Technical Field

[0001] This invention belongs to the field of energy storage battery charge and discharge testing technology, specifically an energy storage battery charge and discharge performance testing device. Background Technology

[0002] With the rapid development of new energy industries such as biomass energy, wind, solar, and energy storage, energy storage batteries, as core supporting equipment in new energy power generation systems, have been widely used in scenarios such as grid peak shaving, energy consumption, off-grid power supply, and power voltage stabilization. Their charge and discharge rates, cycle stability, overload tolerance, and safety protection performance directly determine the operational stability, safety factor, and comprehensive energy utilization efficiency of new energy power generation systems. In order to effectively control the product quality of energy storage batteries, optimize R&D processes, improve actual working condition adaptation solutions, and comprehensively avoid battery operation failures and power transmission hazards, it is becoming increasingly important to conduct high-precision, full-condition charge and discharge performance testing. As a result, accurate testing of the charge and discharge performance of energy storage batteries is gradually becoming a core necessity in the product R&D, technology iteration, and field testing processes in the new energy field.

[0003] Existing technologies disclose several invention patents in the field of energy storage battery charge and discharge testing. Among them, invention patent CN117420460B discloses a charge and discharge testing device for energy storage batteries, including a workbench and a main body of the testing device and a testing platform mounted on top of the workbench. The top of the workbench is rotatably equipped with a telescopic rotating rod. The moving end of the telescopic rotating rod is provided with several sets of sealing covers for covering the energy storage battery on the testing platform. The specifications of the several sets of sealing covers are different. When the telescopic rotating rod rotates, it rotates the mounting bracket and the sealing covers together, moving the sealing cover matching the specifications of the energy storage battery to the top of the testing platform. Existing energy storage battery charge and discharge performance testing devices only use the telescopic rotating rod to rotate and switch between sealing covers of different specifications. Therefore, they have the following defects: they cannot achieve synchronous switching of positive and negative circuits, and are prone to circuit shocks due to timing deviations, which adversely affect the safety of the testing device and the energy storage battery.

[0004] Based on this, the present invention designs a battery charge and discharge performance testing device to solve the above problems. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes a charging and discharging performance testing device for energy storage batteries. This invention primarily addresses the problem that existing energy storage battery charging and discharging performance testing devices rely solely on a telescopic rotating rod to rotate and switch between sealing covers of different specifications. This results in the following drawbacks: the inability to achieve synchronous switching of the positive and negative electrode circuits, and the susceptibility to circuit shocks due to timing deviations, thus adversely affecting the safety of the testing device and the energy storage battery.

[0006] The technical solution adopted by this invention to solve its technical problem is: a battery charging and discharging performance testing device, including a housing, wherein the housing is divided into a heat dissipation chamber and a testing chamber by a partition seat, and a partition and a control unit are provided on one side of the heat dissipation chamber; and further comprising:

[0007] The switching components are provided in multiple ways. Each switching component includes a fixed box fixedly connected to one side of the partition. A conductive seat is embedded in the side of the fixed box near the inside of the partition. An electric push rod is fixedly connected to the outside of the fixed box. One end of the output shaft of the electric push rod extends into the inside of the fixed box and is fixedly connected to an insulating slide plate. A first conductive block is fixedly connected to the top side of the insulating slide plate. A second conductive block is fixedly connected to the bottom side of the insulating slide plate through a connecting block. A vertical plate is fixedly connected to the inside of the fixed box. A first positive electrode and a first negative electrode are embedded in the top side of the vertical plate. A second negative electrode and a second positive electrode are embedded in the bottom side of the vertical plate.

[0008] Preferably, the first conductive block is in contact with the first positive electrode on the side away from the conductive base, and the second conductive block is in contact with the second negative electrode on the side away from the conductive base.

[0009] Preferably, the fixed box is provided with a positive terminal and a negative terminal on one side, wherein the first positive terminal is electrically connected to the positive terminal via a first positive wire, and the other end of the positive terminal is electrically connected to the positive terminal of the control unit;

[0010] Both the first negative electrode and the second negative electrode are electrically connected to the negative electrode connection terminal via negative electrode wires, and the other end of the negative electrode connection terminal is electrically connected to the negative terminal of the control unit.

[0011] Preferably, a connecting pipeline is provided on the side of the conductive base away from the fixed box and electrically connected thereto, and the other end of the connecting pipeline passes through the partition and extends into the interior of the test chamber.

[0012] Preferably, a load adjustment component is provided on one side inside the fixed box. The load adjustment component includes a resistor unit and a rectangular frame, both of which are fixed inside the fixed box on the side away from the vertical plate. The resistor unit has a first through hole processed on the inside side near the rectangular frame.

[0013] The bottom side of the resistor unit is electrically connected to the second positive electrode via a second positive wire, and the bottom side of the second positive electrode is electrically connected to the negative electrode connection end via a wire.

[0014] Preferably, a reciprocating screw is rotatably connected inside the rectangular frame, one end of the reciprocating screw extends to the outside of the fixed box and is fixedly connected to the drive motor, and one side of the drive motor is fixedly connected to the outer wall of the fixed box.

[0015] The reciprocating lead screw is externally connected to a lead screw sleeve, which is slidably connected to the inside of a rectangular frame. Wear-resistant layers are fixedly provided on both sides of the lead screw sleeve. A sliding plate is fixedly connected to the bottom of the lead screw sleeve by a fixing block, and one side of the sliding plate is slidably connected to the inside of the first through hole.

[0016] Preferably, a sliding cavity is provided on each of the two sides inside the rectangular frame, and a sliding seat is slidably connected inside each sliding cavity. A friction block is fixedly connected to the opposite side of the two sliding seats.

[0017] A bidirectional lead screw is rotatably mounted on the bottom side inside the fixed box. Lead screw seats are respectively connected to the outer two sides of the bidirectional lead screw. The top of each lead screw seat is fixedly connected to the bottom of the corresponding sliding seat. A gear is fixedly connected to the center position of the bidirectional lead screw.

[0018] Preferably, a second through hole is provided on one side of the interior of the vertical plate, and springs are provided on both the upper and lower sides of the second through hole. One end of the spring is fixedly connected to the side wall of the vertical plate, and the other end is fixedly connected to a first cone block.

[0019] A sliding block is fixedly connected to the side of the first cone block near the spring. The sliding block is slidably connected inside the second through hole. A rack is fixedly connected to the side of the sliding block away from the top of the first cone block. The rack meshes with a gear.

[0020] The second conductive block is fixedly connected to a second cone block on the side opposite to the connecting block, and the inclined surface of the second cone block matches the inclined surface of the first cone block.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. In this invention, an electric push rod drives an insulating slide plate to move the first and second conductive blocks simultaneously, enabling the positive and negative circuits to be connected and disconnected at the same time. This avoids circuit impact caused by timing deviations and significantly improves the safety of the testing device and the energy storage battery. The electric push rod drives the conductive block assembly to move continuously, first disconnecting the charging circuit and then connecting the discharging circuit, or vice versa. The switching process is logically clear and reliable, requiring no manual rewiring, thus improving testing efficiency and operational convenience.

[0023] 2. In this invention, the switching action is transformed into a damping force adjustment action by using the inclined surface cooperation structure of the second cone block and the first cone block. This realizes the automatic matching of the damping force of the friction block on the movement of the slider during the discharge test, effectively offsetting mechanical gaps and movement inertia, and ensuring continuous and precise fine-tuning of the resistance value.

[0024] 3. In this invention, by controlling the movement of the electric push rod, the damping force can be switched between large and small without leaving the discharge circuit, thus adapting to steady-state discharge conditions with large damping force and fine-tuning resistance, and dynamic sudden loading conditions with small damping force and rapid switching of resistance value, greatly expanding the testing application range of the device.

[0025] 4. In this invention, the increase and decrease of damping force are automatically completed by the mechanical linkage structure such as the inclined surface cooperation between the second cone block and the first cone block, spring energy storage and release, rack and pinion transmission and bidirectional lead screw transmission, without the need to add independent drive components, thus reducing the cost of the device and the complexity of control. Attached Figure Description

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the box body from another perspective in this invention;

[0029] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the switching component in this invention;

[0030] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the fixed box in this invention;

[0031] Figure 5 This is a partial three-dimensional structural diagram of the switching component and the load adjustment component in this invention;

[0032] Figure 6 This is a partial three-dimensional structural diagram of the load adjustment component in this invention;

[0033] Figure 7 For the present invention Figure 6 A magnified view of the structure at point A in the middle;

[0034] Figure 8 This is a schematic diagram of the load adjustment component in this invention from another perspective;

[0035] Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure at point B in the middle.

[0036] In the diagram: 1. Housing; 2. Divider seat; 3. Heat dissipation cavity; 4. Partition plate; 5. Control unit; 6. Switching assembly; 601. Fixing box; 602. Conductive base; 603. Vertical plate; 604. First positive electrode; 605. First negative electrode; 606. Second negative electrode; 607. Second positive electrode; 608. Positive electrode connection terminal; 609. Negative electrode connection terminal; 610. Electric push rod; 611. Insulating sliding plate; 612. First conductive block; 613. Connecting block; 614. Second conductive block; 7. Negative electrode... 701. Load adjustment assembly; 702. Resistor unit; 703. Rectangular frame; 704. Reciprocating lead screw; 705. Lead screw sleeve; 706. Drive motor; 707. Fixing block; 708. Sliding plate; 709. First through hole; 710. Sliding cavity; 711. Sliding seat; 712. Friction block; 713. Lead screw seat; 714. Bidirectional lead screw; 715. Gear; 716. Rack; 717. Spring; 718. First cone block; 719. Sliding block; 710. Second cone block; 8. Connecting pipeline. Detailed Implementation

[0037] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0038] like Figures 1 to 9 As shown, a battery charge / discharge performance testing device includes a housing 1, which is divided into a heat dissipation chamber 3 and a testing chamber by a partition seat 2. A partition 4 and a control unit 5 are disposed on one side of the heat dissipation chamber 3. The device also includes:

[0039] The switching components 6 are provided in multiple ways. Each switching component 6 includes a fixed box 601 fixedly connected to one side of the partition 4. A conductive seat 602 is embedded in the side of the fixed box 601 near the inside of the partition 4. An electric push rod 610 is fixedly connected to the outside of the fixed box 601. One end of the output shaft of the electric push rod 610 extends into the inside of the fixed box 601 and is fixedly connected to an insulating slide plate 611. A first conductive block 612 is fixedly connected to the top side of the insulating slide plate 611. A second conductive block 614 is fixedly connected to the bottom side of the insulating slide plate 611 through a connecting block 613. A vertical plate 603 is fixedly connected to the inside of the fixed box 601. A first positive electrode 604 and a first negative electrode 605 are embedded in the top side of the vertical plate 603. A second negative electrode 606 and a second positive electrode 607 are embedded in the bottom side of the vertical plate 603.

[0040] The specific implementation method is as follows: First, the energy storage battery is placed on top of the horizontal placement seat. Then, the positive and negative terminals of the connecting pipeline 8 are electrically connected to the positive and negative terminals of the energy storage battery to be tested, respectively. After the electrical connection is completed, the operator manually pushes the horizontal placement seat and the energy storage battery on it into the housing 1. Then, the first door panel is closed, and the test operation is performed through the control panel on the partition seat 2. The electric push rod 610 drives the insulating slide plate 611 to move the first conductive block 612 and the second conductive block 614 simultaneously, realizing the simultaneous connection and disconnection of the positive and negative circuits. This avoids circuit impact caused by timing deviation and significantly improves the safety of the test device and the energy storage battery.

[0041] Specifically, the first conductive block 612 is in contact with the first positive electrode 604 on the side away from the conductive base 602, and the second conductive block 614 is in contact with the second negative electrode 606 on the side away from the conductive base 602.

[0042] Specifically, in this embodiment, during the charging performance test, the device is in a charging circuit connected state. The positive terminal of the control unit 5 sequentially transmits the charging voltage and charging current to the positive terminal of the energy storage battery via the positive terminal connection 608, the first positive terminal 604, the first conductive block 612, the conductive base 602, the connecting line 8, and the positive terminal clamp. The negative terminal of the energy storage battery sequentially transmits the current back to the negative terminal of the control unit 5 via the negative terminal clamp, the connecting line 8, the conductive base 602, the second conductive block 614, the second negative terminal 606, and the negative terminal connection 609, thereby forming a complete charging circuit. The control unit 5 outputs the charging voltage and charging current to complete the charging performance test of the energy storage battery. The electric push rod 610 drives the conductive block assembly to move continuously, first disconnecting the charging circuit and then connecting the discharging circuit, or vice versa. The switching process is logically clear and the operation is reliable. There is no need for manual rewiring, which improves the testing efficiency and operation convenience.

[0043] Specifically, the fixed box 601 has a positive terminal 608 and a negative terminal 609 on one side. The first positive terminal 604 is electrically connected to the positive terminal 608 via a first positive terminal 604 wire, and the other end of the positive terminal 608 is electrically connected to the positive terminal of the control unit 5.

[0044] Both the first negative terminal 605 and the second negative terminal 606 are electrically connected to the negative terminal 609 via negative terminal wires, and the other end of the negative terminal 609 is electrically connected to the negative terminal of the control unit 5.

[0045] Specifically, this embodiment is as follows: When a discharge test is required on the energy storage battery, the operator starts the electric push rod 610 through the operation panel. The electric push rod 610 synchronously drives the first conductive block 612, the connecting block 613, and the second conductive block 614 to move through the insulating slide plate 611. During this process, the first conductive block 612 first disconnects its electrical connection with the first positive electrode 604, and the second conductive block 614 simultaneously disconnects its electrical connection with the second negative electrode 606, thus reliably disconnecting the charging circuit. Subsequently, the electric push rod 610 continues to drive the insulating slide plate 611, the first conductive block 612, the connecting block 613, and the second conductive block 614 to move, so that the second conductive block 614 establishes an electrical connection with the second positive electrode 607 at the bottom. At the same time, the first conductive block 612 establishes an electrical connection with the first negative electrode 605, thereby completing the switching of the device from charging mode to discharging mode. The current path description of the charging circuit and the discharging circuit is clear, and the electrical connection relationship of each structural component is clear, ensuring the traceability of the current flow and the repeatability of the test results during the test.

[0046] Specifically, the conductive base 602 is provided with a connecting pipe 8 on the side away from the fixed box 601 and is electrically connected thereto. The other end of the connecting pipe 8 passes through the partition 4 and extends into the test chamber.

[0047] Specifically, this embodiment works as follows: After the switching is completed, the positive terminal of the energy storage battery sequentially transmits current to the resistor unit 701 via the connecting pipeline 8, the conductive base 602, the second conductive block 614, and the second positive terminal 607. After flowing through the resistor unit 701, the current sequentially passes through the negative terminal connection 609, the first negative terminal 605, the first conductive block 612, the conductive base 602, and the connecting pipeline 8, returning to the negative terminal of the energy storage battery to form a complete discharge circuit. This enables the discharge performance test of the energy storage battery. The description follows the sequence of preparation, charging, switching, and discharging, with clear levels and logical coherence, facilitating understanding and execution by operators. It also reflects the high degree of integration and intelligence in the device design.

[0048] Specifically, a load adjustment component 7 is provided on one side inside the fixed box 601. The load adjustment component 7 includes a resistor unit 701 and a rectangular frame 702. Both are fixed inside the fixed box 601 on the side away from the vertical plate 603. A first through hole 708 is machined on the inside side of the resistor unit 701 near the rectangular frame 702.

[0049] The bottom side of the resistor unit 701 is electrically connected to the second positive electrode 607 via a wire, and the bottom side of the second positive electrode 607 is electrically connected to the negative electrode connection terminal 609 via a wire.

[0050] A reciprocating screw 703 is rotatably connected inside the rectangular frame 702. One end of the reciprocating screw 703 extends to the outside of the fixed box 601 and is fixedly connected to the drive motor 705. One side of the drive motor 705 is fixedly connected to the outer wall of the fixed box 601.

[0051] The reciprocating screw 703 is externally connected to a screw sleeve 704. The screw sleeve 704 is slidably connected to the inside of the rectangular frame 702. Wear-resistant layers are fixedly provided on both sides of the screw sleeve 704. The bottom of the screw sleeve 704 is fixedly connected to a slider 707 through a fixing block 706. One side of the slider 707 is slidably connected to the inside of the first through hole 708.

[0052] In this specific embodiment: During movement, the second conductive block 614 drives the second cone block 719 to move. The inclined surface of the second cone block 719 and the inclined surface of the first cone block 717 press against each other, forcing the first cone block 717 to compress the spring 716 and store elastic compression potential energy. The first cone block 717 drives the rack 715 to move via the sliding block 718. Power is transmitted to the gear 714 via the linkage effect between the rack 715 and the gear 714. The gear 714 drives the bidirectional lead screw 713 to rotate. Subsequently, power is transmitted to the lead screw seat 712 via the linkage effect between the bidirectional lead screw 713 and the lead screw seat 712. The lead screw seat 712 drives the friction block 711 to move towards the wear-resistant layer on both sides of the lead screw sleeve 704 via the sliding seat 710, thereby increasing the damping force of the lead screw seat 712 and the sliding plate 707 during movement. The drive motor 705 is then started, driving the reciprocating lead screw 703 to rotate. Power is transmitted through the reciprocating lead screw 703 and the lead screw sleeve 704... The linkage effect between them transmits power to the lead screw sleeve 704. The lead screw sleeve 704 drives the slider 707 to move smoothly inside the resistor unit 701 through the fixed block 706. At this time, the friction block 711 provides a large damping force to the lead screw seat 712 and the slider 707, effectively offsetting mechanical clearance and movement inertia, and realizing continuous and precise fine adjustment of the resistance value. This adapts to the steady-state discharge test requirements of the energy storage battery. Through the inclined surface cooperation structure of the second cone block 719 and the first cone block 717, the switching action is transformed into a damping force adjustment action. This realizes the automatic matching of the damping force of the friction block 711 to the slider 707 during the discharge test, effectively offsetting mechanical clearance and movement inertia, and ensuring continuous and precise fine adjustment of the resistance value. By controlling the movement of the electric push rod 610, the large / small damping force can be switched without leaving the discharge circuit, thereby adapting to steady-state discharge conditions and dynamic sudden loading conditions, greatly expanding the test application range of the device.

[0053] Specifically, sliding cavities 709 are provided on both sides of the inside of the rectangular frame 702. Each sliding cavity 709 is slidably connected to a sliding seat 710. Friction blocks 711 are fixedly connected to the opposite side of the two sliding seats 710.

[0054] A bidirectional lead screw 713 is rotatably mounted on the bottom side inside the fixed box 601. Lead screw seats 712 are respectively connected to the outer sides of the bidirectional lead screw 713. The top of each lead screw seat 712 is fixedly connected to the bottom of the corresponding sliding seat 710. A gear 714 is fixedly connected to the center of the bidirectional lead screw 713.

[0055] A second through hole is provided on one side of the interior of the vertical plate 603. Springs 716 are provided on both the upper and lower sides of the second through hole. One end of the spring 716 is fixedly connected to the side wall of the vertical plate 603, and the other end is fixedly connected to the first cone block 717.

[0056] A sliding block 718 is fixedly connected to the side of the first cone block 717 near the spring 716. The sliding block 718 is slidably connected inside the second through hole. A rack 715 is fixedly connected to the side of the sliding block 718 away from the top of the first cone block 717. The rack 715 meshes with the gear 714.

[0057] The second conductive block 614 is fixedly connected to the side opposite to the connecting block 613 with the second cone block 719, and the inclined surface of the second cone block 719 matches the inclined surface of the first cone block 717.

[0058] Specifically, this embodiment is as follows: Based on actual testing needs, the electric push rod 610 drives the insulating slide plate 611, the first conductive block 612, the connecting block 613, the second conductive block 614, and the second cone block 719 to move slightly away from the first cone block 717. At this time, the second cone block 719 releases its pressure on the first cone block 717. During this process, the second conductive block 614 remains electrically connected to the second positive electrode 607. The spring 716 releases its elastic compressive potential energy, pushing the first cone block 717 to move away from the vertical plate 603. The first cone block 717 drives the gear 714 and the bidirectional lead screw 713 to rotate in opposite directions via the rack 715. The two lead screw seats 712 drive the friction block 711 to move away from the wear-resistant layer, thereby reducing the damping force of the friction block 711 on the lead screw sleeve 704. Simultaneously, the drive motor 705 rotates at high speed, causing the reciprocating lead screw 703 to quickly drive the lead screw sleeve 704 and the slider 707 to move, rapidly switching the resistor unit 7. The 01 input resistance setting simulates dynamic operating conditions with sudden load changes, meeting the requirements of dynamic battery discharge performance testing. The increase and decrease of damping force are automatically completed by mechanical linkage structures such as the inclined surface cooperation of the second cone 719 and the first cone 717, the energy storage and release of the spring 716, the transmission of the rack 715 and gear 714, and the transmission of the bidirectional lead screw 713. There is no need to add independent drive components, reducing the cost of the device and the complexity of control. The increase and decrease of damping force can be adjusted bidirectionally by the slight movement of the electric push rod 610, and the adjustment process is continuous and controllable. It can provide sufficient damping to eliminate inertial impact during steady-state testing, and can quickly release damping to achieve rapid change of resistance value during dynamic testing. Under steady-state conditions, the larger damping force effectively suppresses the disturbance caused by mechanical clearance and moving inertia, making the movement of the slider 707 in the resistor unit 701 more stable, thereby realizing continuous and precise fine adjustment of the resistance value and improving the accuracy and repeatability of discharge performance testing.

[0059] During operation, the energy storage battery is first placed on top of the horizontal placement seat. Then, the positive and negative terminals of the energy storage battery to be tested are electrically connected through the positive and negative terminals of the output terminal of the connecting line 8. After the electrical connection is completed, the operator manually pushes the horizontal placement seat and the energy storage battery on it into the box 1. Then the first door panel is closed, and the test operation is carried out through the control panel on the partition seat 2.

[0060] During the charging performance test, the device is in a charging circuit connected state. The positive terminal of the control unit 5 sequentially transmits the charging voltage and charging current to the positive terminal of the energy storage battery through the positive terminal connection 608, the first positive terminal 604, the first conductive block 612, the conductive base 602, the connecting line 8, and the positive terminal clamp. The negative terminal of the energy storage battery sequentially transmits the current back to the negative terminal of the control unit 5 through the negative terminal clamp, the connecting line 8, the conductive base 602, the second conductive block 614, the second negative terminal 606, and the negative terminal connection 609, thus forming a complete charging circuit. The control unit 5 outputs the charging voltage and charging current to complete the charging performance test of the energy storage battery.

[0061] When a discharge test is required on the energy storage battery, the operator starts the electric push rod 610 through the control panel. The electric push rod 610 drives the first conductive block 612, the connecting block 613 and the second conductive block 614 to move synchronously through the insulating sliding plate 611. During this process, the first conductive block 612 first disconnects the electrical connection with the first positive electrode 604, and the second conductive block 614 disconnects the electrical connection with the second negative electrode 606 at the same time, so as to realize the reliable disconnection of the charging circuit.

[0062] Subsequently, the electric push rod 610 continues to drive the insulating slide plate 611, the first conductive block 612, the connecting block 613 and the second conductive block 614 to move, so that the second conductive block 614 establishes an electrical connection with the second positive electrode 607 at the bottom. At the same time, the first conductive block 612 establishes an electrical connection with the first negative electrode 605, thereby completing the switching of the device from charging mode to discharging mode.

[0063] After the switching is completed, the positive terminal of the energy storage battery transmits current to the resistor unit 701 via the connecting line 8, the conductive base 602, the second conductive block 614 and the second positive terminal 607 in sequence. After the current flows through the resistor unit 701, it passes through the negative terminal connection 609, the first negative terminal 605, the first conductive block 612, the conductive base 602 and the connecting line 8 in sequence, and is transmitted back to the negative terminal of the energy storage battery to form a complete discharge circuit, thereby realizing the discharge performance test of the energy storage battery.

[0064] During the movement of the second conductive block 614, the second cone block 719 moves. The inclined surface of the second cone block 719 and the inclined surface of the first cone block 717 press against each other, forcing the first cone block 717 to compress the spring 716 and store elastic compression potential energy. The first cone block 717 drives the rack 715 to move through the sliding block 718. The power is transmitted to the gear 714 by the linkage effect between the rack 715 and the gear 714. The gear 714 drives the bidirectional lead screw 713 to rotate. Subsequently, the power is transmitted to the lead screw seat 712 by the linkage effect between the bidirectional lead screw 713 and the lead screw seat 712. The lead screw seat 712 drives the friction block 711 to move towards the wear-resistant layer on both sides of the lead screw sleeve 704 through the sliding seat 710, thereby increasing the damping force of the lead screw seat 712 and the slider 707 during the movement.

[0065] Start the drive motor 705, which drives the reciprocating screw 703 to rotate. The power is transmitted to the screw sleeve 704 by the linkage effect between the reciprocating screw 703 and the screw sleeve 704. The screw sleeve 704 drives the slider 707 to move smoothly inside the resistor unit 701 through the fixed block 706. At this time, the friction block 711 provides a large damping force to the screw seat 712 and the slider 707, which effectively counteracts mechanical backlash and moving inertia, and realizes continuous and precise fine adjustment of the resistance value, thereby adapting to the steady-state discharge test requirements of the energy storage battery.

[0066] According to the actual test requirements, the electric push rod 610 drives the insulating slide plate 611, the first conductive block 612, the connecting block 613, the second conductive block 614, and the second cone block 719 to move slightly away from the first cone block 717. At this time, the second cone block 719 releases the squeezing state of the first cone block 717. During this process, the second conductive block 614 still maintains electrical connection with the second positive electrode 607. The spring 716 releases elastic compression potential energy and pushes the first cone block 717 to move away from the vertical plate 603. The first cone block 717 drives the gear 714 and the bidirectional lead screw 713 to rotate in the opposite direction through the rack 715. The two lead screw seats 712 drive the friction block 711 to move away from the wear-resistant layer, thereby reducing the damping force of the friction block 711 on the lead screw sleeve 704.

[0067] At the same time, the drive motor 705 rotates at high speed, causing the reciprocating screw 703 to quickly move the screw sleeve 704 and the slider 707, quickly switching the input resistance value of the resistor unit 701 to simulate the dynamic working condition of sudden load changes and meet the requirements of battery dynamic discharge performance testing.

[0068] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A battery charge / discharge performance testing device, comprising a housing, wherein the housing is divided into a heat dissipation chamber and a testing chamber by a partition seat, and a partition and a control unit are disposed on one side of the heat dissipation chamber; characterized in that, Also includes: The switching components are provided in multiple ways. Each switching component includes a fixed box fixedly connected to one side of the partition. A conductive seat is embedded in the side of the fixed box near the inside of the partition. An electric push rod is fixedly connected to the outside of the fixed box. One end of the output shaft of the electric push rod extends into the inside of the fixed box and is fixedly connected to an insulating slide plate. A first conductive block is fixedly connected to the top side of the insulating slide plate. A second conductive block is fixedly connected to the bottom side of the insulating slide plate through a connecting block. A vertical plate is fixedly connected to the inside of the fixed box. A first positive electrode and a first negative electrode are embedded in the top side of the vertical plate. A second negative electrode and a second positive electrode are embedded in the bottom side of the vertical plate.

2. The energy storage battery charge / discharge performance testing device according to claim 1, characterized in that: The first conductive block is in contact with the first positive electrode on the side away from the conductive base, and the second conductive block is in contact with the second negative electrode on the side away from the conductive base.

3. The energy storage battery charge / discharge performance testing device according to claim 2, characterized in that: The fixed box is provided with a positive terminal and a negative terminal on one side. The first positive terminal is electrically connected to the positive terminal via a first positive wire, and the other end of the positive terminal is electrically connected to the positive terminal of the control unit. Both the first negative electrode and the second negative electrode are electrically connected to the negative electrode connection terminal via negative electrode wires, and the other end of the negative electrode connection terminal is electrically connected to the negative terminal of the control unit.

4. The energy storage battery charge / discharge performance testing device according to claim 3, characterized in that: The conductive base is provided with a connecting pipeline on the side away from the fixed box and is electrically connected thereto. The other end of the connecting pipeline passes through the partition and extends into the test chamber.

5. The energy storage battery charge / discharge performance testing device according to claim 4, characterized in that: A load adjustment component is provided on one side inside the fixed box. The load adjustment component includes a resistor unit and a rectangular frame, both of which are fixed inside the fixed box on the side away from the vertical plate. A first through hole is machined on the inside side of the resistor unit near the rectangular frame. The bottom side of the resistor unit is electrically connected to the second positive electrode via a second positive wire, and the bottom side of the second positive electrode is electrically connected to the negative electrode connection end via a wire.

6. The energy storage battery charge / discharge performance testing device according to claim 5, characterized in that: A reciprocating screw is rotatably connected inside the rectangular frame. One end of the reciprocating screw extends to the outside of the fixed box and is fixedly connected to the drive motor. One side of the drive motor is fixedly connected to the outer wall of the fixed box. The reciprocating lead screw is externally connected to a lead screw sleeve, which is slidably connected to the inside of a rectangular frame. Wear-resistant layers are fixedly provided on both sides of the lead screw sleeve. A sliding plate is fixedly connected to the bottom of the lead screw sleeve by a fixing block, and one side of the sliding plate is slidably connected to the inside of the first through hole.

7. The energy storage battery charge / discharge performance testing device according to claim 6, characterized in that: The rectangular frame has sliding cavities on both sides, and each sliding cavity is slidably connected to a sliding seat. Friction blocks are fixedly connected to the opposite sides of the two sliding seats. A bidirectional lead screw is rotatably mounted on the bottom side inside the fixed box. Lead screw seats are respectively connected to the outer two sides of the bidirectional lead screw. The top of each lead screw seat is fixedly connected to the bottom of the corresponding sliding seat. A gear is fixedly connected to the center position of the bidirectional lead screw.

8. The energy storage battery charge / discharge performance testing device according to claim 7, characterized in that: A second through hole is provided on one side of the interior of the vertical plate. Springs are provided on both the upper and lower sides of the second through hole. One end of each spring is fixedly connected to the side wall of the vertical plate, and the other end is fixedly connected to a first cone block. A sliding block is fixedly connected to the side of the first cone block near the spring. The sliding block is slidably connected inside the second through hole. A rack is fixedly connected to the side of the sliding block away from the top of the first cone block. The rack meshes with a gear. The second conductive block is fixedly connected to a second cone block on the side opposite to the connecting block, and the inclined surface of the second cone block matches the inclined surface of the first cone block.

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