Batch battery cell OCV and DCR testing machine

Abstract

The utility model provides a batch battery cell OCV and DCR testing machine, and aims to realize automatic and batch testing of all battery cells in a material frame and ensure high efficiency of testing. The testing machine comprises a feeding mechanism, a double-rotor carrying mechanism, an OCV testing jig, a DCR testing jig and a discharging mechanism. The feeding mechanism is in butt joint with and conveys a material frame containing battery cells to the double-rotor carrying mechanism. The double-rotor carrying mechanism transfers the material frame to the OCV test jig and the DCR test jig through two sets of independent carrying assemblies for testing. And after the test is completed, the material frame is transferred to the discharging mechanism for discharging. By optimizing the equipment structure and the testing process, manual intervention is reduced, the testing efficiency is remarkably improved, and the high-standard requirement of the battery production industry on the battery cell testing equipment is met.

Description

Technical Field

[0001] The present application relates to the field of battery cell testing equipment, and in particular to a batch battery cell OCV and DCR testing machine. Background Art

[0002] In the battery manufacturing industry, cell performance testing is a critical step in ensuring product quality and reliability. Open circuit voltage (OCV) and direct current resistance (DCR), two key indicators of cell performance, are directly related to the battery's energy density, charge and discharge efficiency, and cycle life. Therefore, rapid and accurate OCV and DCR testing of cells is a crucial step in the battery production line.

[0003] Traditionally, OCV and DCR testing of battery cells has mostly been done manually or semi-automatically. This approach is not only inefficient but also prone to test errors due to human error. With the expansion of battery production and the prevalence of automated production lines, the demand for battery cell testing equipment is also increasing. This equipment is required to perform efficient, accurate, and mass-produced testing.

[0004] However, existing batch battery cell testing equipment often has the following shortcomings: first, the equipment structure is complex, occupies a large area, and is not convenient for flexible deployment; second, the testing process is not optimized enough and the testing efficiency is low; third, the degree of automation of the equipment is not high enough and still requires a lot of manual intervention. Utility Model Content

[0005] The purpose of this application is to provide a batch battery cell OCV and DCR tester that can perform automated, batch testing of all battery cells within a rack while ensuring high test efficiency. By optimizing the equipment structure and testing process, manual intervention can be reduced, and test efficiency can be improved, thereby meeting the high standards required of battery cell testing equipment in the battery production industry.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A batch battery cell OCV and DCR testing machine for testing all battery cells in a material frame, comprising a feeding mechanism, a double-mover carrying mechanism, an OCV testing fixture, a DCR testing fixture and a discharging mechanism, the feeding mechanism is arranged on one side of the OCV testing fixture and used for docking the material frame containing battery cells and conveying to the material taking position of the double-mover carrying mechanism, the double-mover carrying mechanism is used for transferring the material frame containing battery cells to the OCV testing fixture, the OCV testing fixture tests all battery cells in the material frame, after testing, the double-mover carrying mechanism transfers the material frame containing battery cells to the DCR testing fixture, the DCR testing fixture tests all battery cells in the material frame, after testing, the double-mover carrying mechanism transfers the material frame containing battery cells to the discharging mechanism, and the discharging mechanism discharges the material frame containing battery cells, the double-mover carrying mechanism comprises a carrying driving module and two groups of carrying assemblies, and the two groups of carrying assemblies are respectively mounted on the carrying driving module, and each group of carrying assemblies can carry the material frame containing battery cells independently.

[0008] Further, the carrying assembly comprises a carrying lifting driving device, a first carrying beam, a first positioning and clamping module, a second carrying beam and a second positioning and clamping module, the carrying lifting driving device is arranged on the two sides of the first carrying beam respectively, the first positioning and clamping module is arranged on the two sides of the first carrying beam respectively and used for clamping the left and right sides of the material frame respectively, the second carrying beam is mounted on the bottom of the middle of the first carrying beam, and the second positioning and clamping module is arranged on the two sides of the second carrying beam respectively and used for clamping the front and rear sides of the material frame respectively, and the carrying lifting driving device drives the first carrying beam to drive the second carrying beam to drive the material frame seat to move up and down.

[0009] Further, the first positioning and clamping module comprises a first positioning and clamping cylinder and a first positioning and clamping block, and the first positioning and clamping cylinder is used for driving the first positioning and clamping block to clamp the side edge of the material frame.

[0010] Further, the second positioning and clamping module comprises a second positioning and clamping cylinder and a second positioning and clamping block, and the second positioning and clamping cylinder is used for driving the second positioning and clamping block to clamp the side edge of the material frame.

[0011] Further, the feeding mechanism comprises a material docking device and a material lifting driving device, and the material lifting driving device is arranged on the back side of the material docking device and used for driving the material docking device seat to move up and down.

[0012] Further, the material docking device comprises docking belts, guide belt rollers, an intermediate guide assembly and a first driving device. The docking belts are symmetrically arranged left and right. The guide belt rollers are arranged in the docking belts. The first driving device is used to drive the docking belts to rotate and convey. The intermediate guide assembly is arranged between the two docking belts and is used to support the middle part of the bottom of the material frame.

[0013] Further, the material lifting driving device comprises a second driving device, a driving screw rod and a driving guide rail. The material docking device is mounted on the driving guide rail. The second driving device drives the material docking device to move up and down along the driving guide rail through the driving screw rod.

[0014] Further, one side of the material docking device is provided with a material side edge positioning device. The material side edge positioning device comprises a material positioning push plate, a material positioning fixed plate and a material positioning cylinder. The material positioning cylinder drives the material positioning push plate to push the material frame to the side of the material positioning fixed plate for positioning.

[0015] Further, one side of the material docking device is provided with a feeding detection device.

[0016] Further, one side of the material docking device is provided with a proximity switch.

[0017] The beneficial effects of the present application are as follows:

[0018] (1) The present application can greatly reduce manual intervention and improve test efficiency through an automatic and continuous test process. The design of the double-motor carrying mechanism enables the two carrying assemblies to work simultaneously or independently, thereby accelerating the transfer speed of the material frame between different test fixtures and shortening the overall test cycle.

[0019] (2) The test machine of the present application is compact in structure, small in floor area and convenient for flexible deployment and integration on the production line by reasonably arranging the functional modules (such as the feeding mechanism, the double-motor carrying mechanism, the test fixture and the discharging mechanism). BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure schematic diagram of the batch battery OCV and DCR test machine provided by an embodiment of the present application is shown;

[0021] Figure 2 The structure schematic diagram of the double-motor carrying mechanism provided by an embodiment of the present application is shown;

[0022] Figure 3 The structure schematic diagram of the double-motor carrying mechanism provided by an embodiment of the present application is shown;

[0023] Figure 4A schematic structural diagram of a feeding mechanism provided in one embodiment of the present application;

[0024] Figure 5 A schematic diagram of the structure of a DCR test fixture provided in one embodiment of the present application;

[0025] Description of reference numerals:

[0026] 100, loading mechanism; 200, double-actuator transport mechanism; 300, OCV test fixture; 400, DCR test fixture; 500, unloading mechanism; 600, material frame; 700, battery cell;

[0027] 210, transport drive module; 220, transport assembly;

[0028] 221, transport and lifting drive device; 222, first transport beam; 223, first positioning and clamping module; 224, second transport beam; 225, second positioning and clamping module;

[0029] 2231, first positioning and clamping cylinder; 2232, first positioning and clamping block;

[0030] 2251, second positioning and clamping cylinder; 2252, second positioning and clamping block;

[0031] 110. Material docking device; 120. Material lifting drive device; 130. Material side positioning device; 140. Feed detection device; 150. Proximity switch;

[0032] 111. docking belt; 112. guide belt roller; 113. intermediate guide assembly; 114. first drive device;

[0033] 121. Second driving device; 122. Driving screw; 123. Driving guide rail;

[0034] 131. Material positioning push plate; 132. Material positioning fixed plate; 133. Material positioning cylinder; DETAILED DESCRIPTION

[0035] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The implementation of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0036] like Figure 1 As shown, the batch battery cell OCV and DCR testing machine of the present invention primarily comprises five components: a loading mechanism 100, a dual-actuator transport mechanism 200, an OCV test fixture 300, a DCR test fixture 400, and an unloading mechanism 500. The compact layout and coordinated operation of various components enable automated, batch testing of battery cells 700 within a feed frame 600.

[0037] The loading mechanism 100 is arranged on one side of the OCV test fixture 300, and is used to dock the material frame 600 containing the battery cells 700 and transport it to the material picking position of the double-acting sub-transporting mechanism 200. The double-acting sub-transporting mechanism 200 is used to transfer the material frame 600 containing the battery cells 700 to the OCV test fixture 300. The OCV test fixture 300 performs an OCV test on all the battery cells 700 in the material frame 600. After the test, the double-acting sub-transporting mechanism 200 transfers the material frame 600 containing the battery cells 700 to the DCR test fixture 400. The DCR test fixture 400 performs a DCR test on all the battery cells 700 in the material frame 600. After the test, the double-acting sub-transporting mechanism 200 transfers the material frame 600 containing the battery cells 700 to the unloading mechanism 500. The unloading mechanism 500 unloads the material frame 600 containing the battery cells 700.

[0038] The dual-actuator transport mechanism 200 includes a transport drive module 210 and two groups of transport assemblies 220 . The two groups of transport assemblies 220 are respectively installed on the transport drive module 210 . Each group of transport assemblies 220 can independently transport the material frame 600 containing the battery cells 700 .

[0039] The OCV test fixture 300 is located between the loading mechanism 100 and the DCR test fixture 400. It is equipped with multiple sets of probes inside for docking with the contact points of the battery cells 700 in the material frame 600. During the test, the dual-actuator transport mechanism 200 places the material frame 600 containing the battery cells 700 on the OCV test fixture 300 and fixes it through a positioning mechanism. Subsequently, the probes in the test fixture contact the battery cells 700 to perform an open circuit voltage (OCV) test. After the test is completed, the dual-actuator transport mechanism 200 transfers the material frame 600 to the next workstation. Among them, the OCV test fixture 300 is the OCV test fixture in patent publication number CN202111553015.7.

[0040] The structure of the DCR test jig 400 is similar to that of the OCV test jig 300, but the internal probe configuration and test principles differ. The DCR test jig 400 is used to measure the internal resistance (DCR) of the battery cells 700. The test process is the same as the OCV test. The dual-actuator transport mechanism 200 transfers the material frame 600 containing the battery cells 700 to the DCR test jig 400. After the test jig performs the internal resistance test, the material frame 600 is transferred to the unloading mechanism 500.

[0041] The workflow is:

[0042] The loading mechanism 100 receives the material frame 600 containing the battery cells 700 transported from the outside, and transports it to the material picking position of the dual-acting transport mechanism 200 via a conveyor belt. A group of transport components 220 of the dual-acting transport mechanism 200 clamps the material frame 600 and transfers it to the OCV test fixture 300 for OCV testing. After the OCV test is completed, the dual-acting transport mechanism 200 transfers the material frame 600 to the DCR test fixture 400 for DCR testing. After the DCR test is completed, the dual-acting transport mechanism 200 transfers the tested material frame 600 to the unloading mechanism 500 for unloading. The unloading mechanism 500 transports the material frame 600 to the collection device for stacking or further processing.

[0043] like Figure 2 and Figure 3 As shown, in this embodiment, the transport assembly 220 includes a transport and lifting drive device 221, a first transport beam 222, a first positioning and clamping module 223, a second transport beam 224, and a second positioning and clamping module 225. The transport and lifting drive devices 221 are located on either side of the first transport beam 222, and a synchronous drive mechanism ensures consistent lifting motion on both sides. The transport and lifting drive device 221 uses a cylinder as a power source to achieve the lifting motion of the first transport beam 222. The first transport beam 222: As the main load-bearing structure, the first transport beam 222 has sufficient strength and rigidity to support the entire transport assembly 220 and the material frame 600 being transported. Mounting blocks for the transport and lifting drive device 221 are mounted on both sides of the first transport beam 222 for securing and connecting the lift drive device. The first positioning and clamping modules 223: Located on either side of the first transport beam 222, each set of first positioning and clamping modules 223 includes a first positioning and clamping cylinder 2231 and a first positioning and clamping block 2232. The first positioning and clamping cylinder 2231, via a cylinder rod, drives the first positioning and clamping blocks 2232 along a preset trajectory, clamping the left and right sides of the material frame 600. The clamping blocks are made of non-slip material to ensure secure clamping without damaging the material frame 600. The second transport beam 224 is mounted at the center bottom of the first transport beam 222, forming a stable support structure with the first transport beam 222. The design of the second transport beam 224 ensures that the transport assembly 220 maintains balance during lifting and lowering, reducing vibration and impact. The second positioning and clamping modules 225 are located on either side of the second transport beam 224. Similar in structure to the first positioning and clamping modules 223, they include a second positioning and clamping cylinder 2251 and a second positioning and clamping block 2252. The second positioning and clamping cylinder 2251 drives the second positioning and clamping blocks 2252 to clamp the front and back sides of the material frame 600, ensuring stability and safety during transport.

[0044] like Figure 4As shown, in this embodiment, the loading mechanism 100 includes a material docking device 110 and a material lifting drive device 120. The material lifting drive device 120 is arranged on the rear side of the material docking device 110 and is used to drive the material docking device 110 to move up and down.

[0045] like Figure 4 As shown, the material docking device 110 includes a docking belt 111, a guide belt roller 112, an intermediate guide assembly 113, and a first drive device 114. The docking belt 111 is symmetrically arranged to form a stable conveying channel. The guide belt roller 112 is arranged inside the docking belt 111 to support and guide the movement direction of the belt. The first drive device 114 (such as a servo motor or a reduction motor) drives the docking belt 111 to rotate and convey through a transmission mechanism such as a pulley. The intermediate guide assembly 113 is arranged between the two docking belts 111 to support the middle portion of the bottom of the material frame 600 to prevent the material frame 600 from tilting or shaking during transportation.

[0046] like Figure 4 As shown, the material lifting drive device 120 includes a second drive device 121, a drive screw 122, and a drive guide rail 123. The material docking device 110 is mounted on the drive guide rail 123, and a slider cooperates with the guide rail to achieve linear motion along the guide rail. The second drive device 121 (e.g., a servo motor) is connected to the material docking device 110 via the drive screw 122, driving the material docking device 110 to move up and down along the drive guide rail 123. This allows the height of the material docking device 110 to be adjusted according to different input or output requirements.

[0047] The material side positioning device 130 is located on one side of the material docking device 110 and includes a material positioning push plate 131, a material positioning fixing plate 132, and a material positioning cylinder 133. The material positioning cylinder 133, via a cylinder rod, drives the material positioning push plate 131 along a preset trajectory, pushing the material frame 600 toward the material positioning fixing plate 132 for positioning. The positioning push plate is surfaced with a cushioning material to reduce impact on the material frame 600.

[0048] Feed detection device 140: Located on one side of material docking device 110, it detects whether a material frame 600 has entered the docking area. Feed detection device 140 can utilize components such as a photoelectric sensor or proximity switch 150. When a material frame 600 is detected, it sends a signal to the control system, triggering subsequent handling and testing processes.

[0049] Proximity switch 150: Also located on one side of the material docking device 110, it serves as a safety feature. When a foreign object or person enters the danger zone, the proximity switch 150 immediately sends a signal to the control system, halting the equipment and ensuring safe operation.

[0050] The structure of the unloading mechanism 500 is the same as that of the loading mechanism 100 , and therefore will not be described again here.

[0051] In the description of the embodiments of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on specific circumstances.

[0052] In the embodiments of the present application, any device or element referred to or implied must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise specifically specified.

[0053] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present application described herein, for example, can be implemented in orders other than those illustrated or described herein. In addition, the terms "may include" and "have" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or apparatus.

[0054] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they may modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the various embodiments of this application.

Claims

1. A batch battery cell OCV and DCR tester, used to test all battery cells in a material frame, characterized by: It includes a loading mechanism, a dual-acting sub-transporting mechanism, an OCV test jig, a DCR test jig and a unloading mechanism. The loading mechanism is arranged on one side of the OCV test jig, and is used to dock the material frame containing battery cells and transport it to the material picking position of the dual-acting sub-transporting mechanism. The dual-acting sub-transporting mechanism is used to transfer the material frame containing battery cells to the OCV test jig. The OCV test jig performs OCV test on all battery cells in the material frame. After the test, the dual-acting sub-transporting mechanism transfers the material frame containing battery cells to the DCR test jig. The DCR test jig performs DCR test on all battery cells in the material frame. After the test, the dual-acting sub-transporting mechanism transfers the material frame containing battery cells to the unloading mechanism. The unloading mechanism unloads the material frame containing battery cells. The dual-acting sub-transporting mechanism includes a transport drive module and two groups of transport groups. The two groups of transport components are respectively installed on the transport drive module. Each group of transport components can independently transport the material frame containing battery cells.

2. A batch battery cell OCV and DCR tester according to claim 1, characterized in that: The transport assembly includes a transport and lifting drive device, a first transport beam, a first positioning and clamping module, a second transport beam and a second positioning and clamping module. The transport and lifting drive device is respectively arranged on both sides of the first transport beam, and the first positioning and clamping modules are respectively arranged on both sides of the first transport beam for clamping the left and right sides of the material frame respectively. The second transport beam is installed at the bottom in the middle of the first transport beam, and the second positioning and clamping modules are respectively arranged on both sides of the second transport beam for clamping the front and back sides of the material frame respectively. The transport and lifting drive device drives the first transport beam to drive the second transport beam to drive the material frame seat to rise and fall.

3. The batch battery cell OCV and DCR tester according to claim 2, characterized in that: The first positioning and clamping module includes a first positioning and clamping cylinder and a first positioning and clamping block. The first positioning and clamping cylinder is used to drive the first positioning and clamping block to clamp the side of the material frame.

4. The batch battery cell OCV and DCR tester according to claim 2, characterized in that: The second positioning and clamping module includes a second positioning and clamping cylinder and a second positioning and clamping block. The second positioning and clamping cylinder is used to drive the second positioning and clamping block to clamp the side of the material frame.

5. The batch battery cell OCV and DCR tester according to claim 1, characterized in that: The feeding mechanism includes a material docking device and a material lifting drive device. The material lifting drive device is arranged at the rear side of the material docking device and is used to drive the material docking device seat to move up and down.

6. The batch battery cell OCV and DCR tester according to claim 5, characterized in that: The material docking device includes a docking belt, a guide belt roller, an intermediate guide assembly and a first drive device. The docking belt is symmetrically arranged on the left and right. The guide belt roller is arranged inside the docking belt. The first drive device is used to drive the docking belt to perform a rotational conveying motion. The intermediate guide assembly is arranged between the two docking belts and is used to support the middle part of the bottom of the material frame.

7. The batch battery cell OCV and DCR tester according to claim 5, characterized in that: The material lifting drive device includes a second drive device, a drive screw, and a drive guide rail. The material docking device is installed on the drive guide rail. The second drive device drives the material docking device to perform lifting motion along the drive guide rail through the drive screw.

8. The batch battery cell OCV and DCR tester according to claim 5, characterized in that: A material side positioning device is provided on one side of the material docking device, and the material side positioning device includes a material positioning push plate, a material positioning fixed plate and a material positioning cylinder. The material positioning cylinder drives the material positioning push plate to push the material frame to the side of the material positioning fixed plate for positioning.

9. The batch battery cell OCV and DCR tester according to claim 5, characterized in that: A feeding detection device is provided on one side of the material docking device.

10. The batch battery cell OCV and DCR tester according to claim 5, characterized in that: A proximity switch is provided on one side of the material docking device.

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