Internal resistance jump testing device

Abstract

The utility model belongs to the technical field of testing equipment, and mainly relates to an internal resistance jump testing device, which comprises a supporting mechanism for bearing a to-be-tested cell, a pressing mechanism erected on the supporting mechanism and used for fixing the to-be-tested cell, a testing mechanism matched with the pressing mechanism to work, and a control mechanism for controlling the pressing mechanism and the testing mechanism to work, the control mechanism is provided with relays electrically connected with the pressing mechanism and the testing mechanism. The relays comprise an intermediate relay and a time-delay relay matched with the intermediate relay. According to the utility model, the test mechanism is cooperatively controlled through the intermediate relay and the time-delay relay, so that the precise control of the secondary test time is realized, the consistency of each test time is ensured, the reliability and reference value of test data are further enhanced, and the test accuracy is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of test equipment, and particularly relates to an internal resistance jump test device. Background Art

[0002] In modern electronic devices, the battery, as an important energy supply device, directly affects the operation stability and service life of the device. Among them, the internal resistance and voltage of the battery are two important performance parameters, and their tests are of great significance for the production, use, and maintenance of the battery. The internal resistance jump test is a common battery performance test method, which can reflect the internal structure and material characteristics of the battery, so as to evaluate the health status and service life of the battery. However, the traditional internal resistance jump test method usually requires manual wiring, which is not only cumbersome to operate but also prone to poor contact, thus affecting the accuracy of the test results.

[0003] In view of this problem, some current technical solutions have proposed several improvement measures. For example, some solutions introduce automated test equipment and realize the automation of wiring and testing by using equipment such as robotic arms. However, although these technical solutions optimize the problems of the traditional method to a certain extent, they still fail to completely eliminate the problems of large fluctuations in test data and meaningless data caused by manual wiring during the secondary test process.

[0004] Based on this, it is urgent to improve the existing internal resistance jump test device to solve the defects of the foregoing technologies. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an internal resistance jump test device for the deficiencies of the existing technology, thereby solving the problem of large fluctuations in test data caused by manual wiring during the secondary test of the existing internal resistance jump test.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An internal resistance jump test device includes a support mechanism for carrying a cell to be tested, a pressing mechanism erected on the support mechanism and fixing the cell to be tested, a test mechanism cooperating with the pressing mechanism, and a control mechanism for controlling the operation of the pressing mechanism and the test mechanism;

[0008] The control mechanism has a relay electrically connected to both the pressing mechanism and the test mechanism. The relay includes an intermediate relay and a time-delay relay cooperating with the intermediate relay.

[0009] Compared with the existing technology, the utility model has at least the following beneficial effects:

[0010] Compared with the prior art, the utility model pays more attention to strictly controlling the second test accuracy during the internal resistance jump of the battery cell. When the intermediate relay receives an electrical signal, it immediately activates the pressing mechanism and the testing mechanism for the first test. At the same time, after the time-delay relay receives the same electrical signal or the electrical signal transmitted from the intermediate relay, it will output a high level (driving signal) to drive the testing mechanism, or cooperate with the pressing mechanism and the testing mechanism to jointly perform the second test. This design ensures that the time difference between the two tests of the battery cell passing through the internal resistance jump testing device of the utility model is consistent, thereby realizing a more accurate and automated detection of the internal resistance jump of the battery cell.

[0011] As a further improvement to the internal resistance jump testing device of the utility model, the support mechanism includes a support table, a top edge stop block, and a side edge stop block. Both the top edge stop block and the side edge stop block are installed on the support table. After the top edge stop block and the side edge stop block are assembled, a fixed area is formed on the support table. Among them, the support mechanism not only has the basic function of carrying the battery cell to be tested, but also forms a fixed area on the support table through the combination of the top edge stop block and the side edge stop block. This design not only ensures the stability of the battery cell during the test, but also makes the test operation more convenient.

[0012] As a further improvement to the internal resistance jump testing device of the utility model, a notch is provided in the fixed area of the support table. The setting of the notch facilitates the fixing and positioning of the battery cell, avoids the edge of the support table affecting the operation, allows a specific part (such as the pin) of the battery cell to be exposed, so as to facilitate the contact and testing of the testing mechanism.

[0013] As a further improvement to the internal resistance jump testing device of the utility model, the support table is provided with adjustment holes for adjusting the positions of the top edge stop block and the side edge stop block. This design enables the positions of the top edge stop block and the side edge stop block to be flexibly adjusted according to the size and shape of the battery cell, thereby improving the adaptability and versatility of the device.

[0014] As a further improvement to the internal resistance jump testing device of the utility model, the support table is provided with scale lines for adjusting the position of the side edge stop block.

[0015] As a further improvement to the internal resistance jump testing device of the utility model, the pressing mechanism includes a first driving member and a pressing block connected to the output end of the first driving member. The pressing block corresponds to the fixed area. The pressing mechanism realizes the reliable fixation of the battery cell through the cooperation of the first driving member and the pressing block. At the same time, this design not only ensures the stability of the battery cell during the test, but also avoids test errors caused by the movement or shaking of the battery cell.

[0016] As a further improvement to the internal resistance jump test device of the present utility model, the test mechanism includes a second driving member, a buffer structure connected to the output end of the second driving member, and a test portion installed at the end of the buffer structure. The second driving member is arranged in parallel with the first driving member. The test portion corresponds to the pressing block and their distances from the support table are quite the same. Among them, the second driving member is responsible for driving the entire test mechanism to move and position, and the buffer structure plays a role in shock absorption and buffering, reducing the impact of possible shocks and vibrations generated during the test on the test results.

[0017] As a further improvement to the internal resistance jump test device of the present utility model, the buffer structure includes a connecting member connected to the output end of the second driving member, a linear bearing arranged at the end of the connecting member, a guide post slidably connected to the linear bearing, a spring sleeved on the guide post, and a base fixedly connected to the guide post. The test portion is installed on the base.

[0018] As a further improvement to the internal resistance jump test device of the present utility model, the test portion includes a test board, two contact portions arranged on the test board, and an insulating sheet spaced between two adjacent contact portions. The test portion directly contacts the battery cell to perform the internal resistance test. The design of the test portion fully considers the distribution of the contact portions and the insulation requirements, ensuring the accuracy and reliability of the test.

[0019] As a further improvement to the internal resistance jump test device of the present utility model, the control mechanism further includes a switch for controlling the relay. Description of the Drawings

[0020] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments and descriptions thereof are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0021] Figure 1 is the structural schematic diagram of Embodiment 1 in the present utility model;

[0022] Figure 2 is the structural schematic diagram of Embodiment 2 in the present utility model;

[0023] Figure 3 is the structural schematic diagram of Embodiment 3 in the present utility model;

[0024] Figure 4 is the structural schematic diagram of Embodiment 4 in the present utility model;

[0025] Figure 5 is the structural schematic diagram of the pressing block and the test portion in Embodiment 4 of the present utility model;

[0026] Figure 6 is the structural schematic diagram of the test portion in Embodiment 5 of the present utility model;

[0027] Figure 7 It is a schematic structural diagram of Embodiment 6 in the present utility model;

[0028] Wherein:

[0029] 1 - Support mechanism;

[0030] 11 - Support platform;

[0031] 111 - Adjusting hole;

[0032] 12 - Top edge stopper;

[0033] 13 - Side edge stopper;

[0034] 14 - Fixed area;

[0035] 15 - Notch;

[0036] 16 - Scale line; 2 - Pressing mechanism;

[0037] 21 - First driving member;

[0038] 22 - Pressing block; 3 - Testing mechanism;

[0039] 31 - Second driving member;

[0040] 311 - Connecting member;

[0041] 32 - Buffer structure;

[0042] 33 - Testing part;

[0043] 331 - Testing plate;

[0044] 332 - Contact part;

[0045] 333 - Insulating sheet;

[0046] 34 - Linear bearing;

[0047] 35 - Guide post;

[0048] 36 - Spring;

[0049] 37 - Base;

[0050] 4 - Control mechanism;

[0051] 41 - Switch;

[0052] 5 - Adjusting plate;

[0053] 51 - First adjustment position;

[0054] 52 - Second adjustment position. Specific embodiments

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0056] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", and "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0057] Although the present utility model is disclosed as follows in a preferred embodiment, it is not used to limit the claims. Any person skilled in the art can make several possible changes and modifications without departing from the concept of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the scope defined by the claims of the present utility model.

[0058] Among them, it should be noted that the working principle of the present utility model is that the first data collection is voltage and resistance, and the data collected the second time is also voltage and resistance. Therefore, by comparing the detected data, it can be judged whether the two tab ears are poorly soldered. If they are poorly soldered, the resistance data will change. However, through manual testing, due to uncertainty, the test data may fluctuate whether there is poor soldering or not.

[0059] The following will further describe the present utility model in detail in conjunction with specific embodiments, but the embodiments of the present utility model are not limited thereto.

[0060] Embodiment 1

[0061] As Figure 1As shown in the figure, an internal resistance jump test device includes a support mechanism 1 for carrying the battery cell to be tested, a pressing mechanism 2 mounted on the support mechanism 1 and fixing the battery cell to be tested, a testing mechanism 3 cooperating with the pressing mechanism 2, and a control mechanism 4 for controlling the operation of the pressing mechanism 2 and the testing mechanism 3; wherein, the control mechanism 4 has a relay electrically connected to both the pressing mechanism 2 and the testing mechanism 3, and the relay includes an intermediate relay and a time-delay relay cooperating with the intermediate relay.

[0062] In practical applications, the time-delay relay can synchronously receive a high level (i.e., drive voltage) homologous to the intermediate relay, thereby starting its time-delay timing function. This means that while the pressing mechanism 2 and the testing mechanism 3 receive the drive signal from the intermediate relay and start to execute operations, the time-delay relay has already started the time-delay calculation. When the time-delay timing ends, the time-delay relay transmits the drive signal to both the pressing mechanism 2 and the testing mechanism 3, or only to the testing mechanism 3, to achieve the secondary testing of the internal resistance and voltage of the battery cell. By comparing the two sets of test data, the central control system for detecting the internal resistance of the battery cell of the present utility model can effectively analyze and draw an accurate conclusion about the internal resistance jump of the battery.

[0063] In terms of specific implementation, the intermediate relay mentioned in the present utility model is designed as a multi-contact relay with multiple input ports. One contact is used for the first driving action, and the other contact is responsible for the subsequent secondary driving action. It should be noted that at this time, the time-delay relay does not directly apply the drive signal after the time-delay ends to the pressing mechanism 2 or the testing mechanism 3, but first transmits it to the intermediate relay. By utilizing the multi-contact characteristic of the intermediate relay, the pressing mechanism 2 and the testing mechanism 3 are driven again to complete the testing process. During the first testing process, both the pressing mechanism 2 and the testing mechanism 3 are controlled by the signal at the output end of the intermediate relay. After receiving the drive signal, the pressing mechanism 2 presses the battery cell, and after the testing mechanism 3 completes the test, it is driven by the internal motor of the pressing mechanism 2 to return to the non-working state. This design enables the pressing mechanism 2 and the testing mechanism 3 to quickly return to the initial state after the first test, preparing for the subsequent secondary test.

[0064] In addition, considering the possible limitations of the intermediate relay when driving the pressing mechanism 2 and the testing mechanism 3, the present utility model also proposes a solution of setting the intermediate relay as a multi-channel relay. The multi-channel relay is particularly suitable for scenarios where multiple devices or circuits need to be managed from a single control point. When a multi-channel relay is used as the intermediate relay, once its single contact is in the high-level state (drive voltage), it will send a drive signal to the pressing mechanism 2 and the testing mechanism 3. At the same time, another output point of the multi-channel relay will also output a high-level signal to the time-delay relay to prompt it to start timing. This design not only improves the operation flexibility but also meets the requirement of regulating multiple devices or circuits from a single control point.

[0065] Finally, in this method, it is considered that the intermediate relay is responsible for driving both the clamping mechanism 2 and the testing mechanism 3. Once a fault occurs, it may affect the normal operation of both. Therefore, in order to further optimize the reliability of the test device, the utility model also proposes a solution to split the intermediate relay into two independent relays. In this way, even if one of the relays fails, the other relay can still work normally, thereby ensuring the continuity and stability of the test process. At the same time, we can also use more wear-resistant contact materials to extend the service life of the relay.

[0066] In summary, the utility model improves the test efficiency and reliability of the battery cell internal resistance jump test device by optimizing the design and use of the intermediate relay, and provides more accurate and reliable technical support for battery performance detection.

[0067] Implementation Method 2

[0068] like Figure 1-2 As shown, unlike the first embodiment, the support structure 1 is optimized in this embodiment to make it more compatible with mainstream types of battery cells. Figure 2 From the schematic diagram of the support mechanism 1 shown, it can be seen that the implementation method 2 optimizes and improves the support structure 1 to make it more adaptable to the needs of the internal resistance jump detection of the battery cell. Specifically, the support mechanism 1 is composed of three parts: a support table 11, a top block 12 and a side block 13. These components work together to provide a stable and precise testing environment for the battery cell. The support table 11, as the basis of the entire support mechanism 1, carries the top block 12 and the side block 13 to ensure that they remain stable during the test. The top block 12 and the side block 13 are responsible for limiting the battery cell in the horizontal and vertical directions to prevent it from moving or shifting during the test. In addition, these blocks form a fixed area 14 on the support table 11 through adaptive matching operations, so that the battery cell can be stably placed therein, providing a strong guarantee for subsequent testing work.

[0069] This optimized support mechanism 1 not only improves the stability and accuracy of the test, but also enhances the reliability of the entire test system. The use of the support table 11, the top block 12 and the side block 13 reduces the maintenance cost and replacement frequency. In addition, this structure also makes the various components in the support mechanism 1 easier to install and disassemble, which is convenient for users to perform daily maintenance and maintenance. More importantly, the support mechanism 1 in embodiment 2 also has a certain degree of versatility and can adapt to the testing of battery cells of different specifications and sizes. By adjusting the position and size of the top block 12 and the side block 13, it can be easily adapted to the placement requirements of different battery cells, so that the internal resistance jump test device of the utility model has a wider range of applications.

[0070] Furthermore, a notch 15 is also provided in the fixed area 14 of the support table 11. Its function is to reduce the resistance to replacing the fully tested battery cells, so that there is a reserved position for the battery cells to enter or exit during the process of replacing the fully tested battery cells whether it is done manually or by a robotic arm, thereby improving the efficiency and convenience of battery cell replacement. This design fully considers the operation requirements in the actual application scenario, making the entire testing process smoother and more efficient. In addition, the setting of the notch 15 can also reduce the weight of the support table 11 to a certain extent, lower the cost of the entire testing device, and it also avoids the situation where the test accuracy and stability are affected due to heat accumulation during long-term continuous testing. This design not only meets the requirements of test accuracy but also takes into account the convenience of actual operation and cost-effectiveness.

[0071] Furthermore, the support table 11 is also provided with adjustment holes 111 for adjusting the positions of the top edge stopper 12 and the side edge stopper 13. The setting of the adjustment holes 111 makes the support table 11 more flexible and variable. Through the adjustment holes 111, the user can conveniently adjust the positions of the top edge stopper 12 and the side edge stopper 13 to ensure that the battery cells can be stably placed on the support table 11 during the testing process, thereby avoiding test errors caused by the movement or deviation of the battery cells. At the same time, the adjustment holes 111 also improve the versatility of the support mechanism 1, enabling it to adapt to more types of battery cells for testing. In addition, the design of the adjustment holes 111 simplifies the installation and disassembly process, making it easier for the user to complete the installation and adjustment of the battery cells. This design not only improves work efficiency but also reduces maintenance costs, making the internal resistance jump testing device of the present utility model more advantageous in actual application.

[0072] Further, as Figure 2 shown, the support table 11 is provided with scale lines 16 for adjusting the position of the side edge stopper 13. This design enables the user to more precisely adjust the positions of the top edge stopper 12 and the side edge stopper 13. By referring to the scale lines 16, the user can more intuitively understand the position changes of the stoppers, thereby more accurately controlling the placement position of the battery cells on the support table 11. This design not only improves the test accuracy but also enhances the test repeatability. In addition, the setting of the scale lines 16 also enables the user to more conveniently perform the installation and debugging of the battery cells, improving work efficiency.

[0073] Generally speaking, Embodiment 2 has optimized and improved the support structure 1 in many aspects, including the opening of the fixed area 14, the setting of the notch 15, the design of the adjustment hole 111, and the introduction of the scale line 16, etc. These improvements not only improve the stability and accuracy of the test, but also enhance the reliability and versatility of the entire test system. At the same time, these designs also fully consider the operation requirements and cost-effectiveness in the actual application scenarios, making the internal resistance jump test device of the present utility model more advantageous in actual applications.

[0074] In addition, it is worth noting that the internal resistance jump test device provided by the present utility model is not only applicable to the detection of the internal resistance jump of the battery cell, but also can be applied to other scenarios where the internal resistance change of the object to be tested needs to be measured. For example, in the quality control process of electronic products, a similar test device can be used to detect whether the internal resistance of electronic components is stable and reliable; in the field of materials science research, this test device can also be used to study the resistance change law of materials under different conditions, etc.

[0075] For the content that is the same as that in Embodiment 1, it will not be elaborated in this embodiment.

[0076] Embodiment 3

[0077] As Figure 1-3 shown, different from Embodiment 1, in this embodiment, the pressing mechanism 2 includes a first driving member 21 and a pressing block 22 connected to the output end of the first driving member 21, and the pressing block 22 corresponds to the fixed area 14. Specifically, the design of the pressing mechanism 2 fully considers the stability and safety of the battery cell during the test. The first driving member 21 serves as the power source of the pressing mechanism 2, providing sufficient driving force to enable the pressing block 22 to firmly press the battery cell. The pressing block 22 serves as the executing component of the pressing mechanism 2, directly acting on the battery cell to ensure that the battery cell does not move or shift during the test. This design not only improves the accuracy and stability of the test, but also avoids test errors or safety hazards caused by the movement of the battery cell.

[0078] In actual applications, the working process of the pressing mechanism 2 is as follows: First, the first driving member 21 is started, driving the pressing block 22 to move towards the fixed area 14; then, the pressing block 22 gradually approaches the battery cell and applies a certain pressure to firmly fix it on the support table 11; finally, when the pressing block 22 completely presses the battery cell, the first driving member 21 stops working, maintaining the pressing state of the pressing block 22 to ensure that the battery cell does not move or shift during the subsequent test.

[0079] For the content that is the same as that in Embodiment 1, it will not be elaborated in this embodiment.

[0080] Embodiment 4

[0081] As Figure 1-4As described above, different from Embodiment 1: The testing mechanism 3 of this embodiment further includes a second driving member 31, a buffer structure 32 connected to the output end of the second driving member 31, and a testing portion 33 installed at the end of the buffer structure 32. The second driving member 31 is arranged in parallel with the first driving member 21. The testing portion 33 corresponds to the pressing block 22 and the distances between them and the support table 11 are quite the same. This design enables the testing mechanism 3 to maintain a certain buffering and shock-absorbing effect while pressing the battery cell, thereby avoiding excessive pressure or impact on the battery cell and ensuring the safety of the battery cell. The design of the buffer structure 32 takes into account the selection of elastic materials and the design of the structure, enabling it to withstand a certain amount of pressure and quickly return to its original state after the pressure is released, thus ensuring the continuity and stability of the test. At the same time, the introduction of the buffer structure 32 also enables the testing portion 33 to be more stable and steady when contacting the battery cell, avoiding errors or damages caused by impact.

[0082] In practical applications, the working process of the testing mechanism 3 is as follows: First, the second driving member 31 is activated to drive the buffer structure 32 to move towards the pressing block 22; then, the buffer structure 32 gradually approaches the pressing block 22 and contacts it. Due to the elastic effect of the buffer structure 32, the testing portion 33 can contact the battery cell with a certain buffering force; finally, when the testing portion 33 is in stable contact with the battery cell, the second driving member 31 stops working to maintain the stable state of the testing portion 33, and the internal resistance jump test work begins.

[0083] In addition, since the second driving member 31 is arranged in parallel with the first driving member 21, the pressing mechanism 2 and the testing mechanism 3 can coordinate with each other during operation, ensuring the continuity and stability of the test. At the same time, the testing portion 33 corresponds to the pressing block 22 and the distances between them and the support table 11 are quite the same, making the position of the battery cell more stable during the test and improving the accuracy and reliability of the test.

[0084] Generally speaking, Embodiment 4 optimizes and improves the testing mechanism 3 in many aspects, including the introduction of the buffer structure 32, the design of the second driving member 31, and the installation of the testing portion 33. These improvements not only improve the stability and accuracy of the test, but also enhance the safety and reliability of the entire testing system. At the same time, these designs also fully consider the operation requirements and cost-effectiveness in the actual application scenario, making the internal resistance jump testing device of the present utility model more advantageous in practical applications.

[0085] Furthermore, as Figure 5As shown, the buffer structure 32 includes a connecting member 311 connected to the output end of the second driving member 31, a linear bearing 34 provided at the end of the connecting member 311, a guide post 35 slidably connected to the linear bearing 34, a spring 36 sleeved on the guide post 35, and a base 37 fixedly connected to the guide post 35. The testing part 33 is installed on the base 37. This design enables the buffer structure 32 to better adapt to various changes during the testing process, ensuring the accuracy and stability of the testing. Specifically, the connecting member 311, as the connecting component between the buffer structure 32 and the second driving member 31, can transmit the power of the second driving member 31 to each part of the buffer structure 32. The sliding connection structure of the linear bearing 34 and the guide post 35 enables the buffer structure 32 to move smoothly when subjected to pressure, while avoiding resistance or damage caused by friction. The spring 36, as the core component of the buffer structure 32, can provide a certain buffer force, reducing the impact force of the testing part 33 on the battery cell and protecting the battery cell from damage. The base 37 is used to fix the testing part 33, enabling it to perform the testing work stably.

[0086] In practical applications, when the testing part 33 contacts the battery cell, due to the resistance of the battery cell and the buffering effect of the spring 36, the guide post 35 will slide within the linear bearing 34, thereby absorbing part of the impact force. At the same time, the compression of the spring 36 will further reduce the magnitude of the impact force, protecting the battery cell from damage. When the testing part 33 completes the testing and withdraws from the battery cell, the spring 36 will return to its original state, pushing the guide post 35 and the testing part 33 back to the initial position to prepare for the next test.

[0087] In addition, the design of this buffer structure 32 also has good versatility and adjustability. By replacing the spring 36 with different stiffnesses or adjusting the pre-tightening force of the spring 36, it can adapt to the testing requirements of different battery cells. At the same time, each component of the buffer structure 32 can also be disassembled and replaced as needed, facilitating maintenance and servicing.

[0088] Preferably, as Figure 6 shown, the testing part 33 includes a test board 331, a plurality of contact parts 332 evenly distributed on the test board 331, and insulating sheets 333 spaced between two adjacent contact parts 332.

[0089] The test board 331, as the main part of the test unit 33, is used to carry the contact part 332 and the insulating sheet 333 and fix them on the base 37. The contact part 332 is the contact part between the test unit 33 and the battery cell, which is used to transmit current and voltage signals, so as to realize the test of the internal resistance of the battery cell. In addition, the above-mentioned contact part 332 is electrically connected to the data processing system of the battery cell internal resistance jump detection device of the present utility model, and the data processing system transmits all the information collected by the contact part 332 to the control system for storage and analysis. The insulating sheet 333 is used to prevent the electrical signal interference between adjacent contact parts 332, ensuring the accuracy and reliability of the test. At the same time, the design of the insulating sheet 333 also considers its material and thickness to ensure that it can not only achieve a good insulating effect, but also will not affect the overall structure and performance of the test unit 33.

[0090] In addition, during the test process, the test board 331 approaches the battery cell as the buffer structure 32 moves. The contact points of the contact part 332 correspond to those of the battery cell. By applying a certain pressure, a good electrical contact is formed between the contact part 332 and the battery cell. The insulating sheet 333 ensures that the electrical signals between adjacent contact parts 332 do not interfere with each other, thus ensuring the accuracy of the test. Thereby, by testing the voltage and current signals between the contact parts 332, the internal resistance of the battery cell can be calculated, so as to judge the battery internal resistance jump situation of the detected battery cell.

[0091] For those that are the same as Embodiment 1, they will not be elaborated in this embodiment.

[0092] Embodiment 5

[0093] As Figure 1-6 shown, different from Embodiment 4, in this embodiment, the test mechanism 3 and the pressing mechanism 2 are fixed together by an adjustment plate 5. The first adjustment position 51 for fixing the test mechanism 3 and the second adjustment position 52 for fixing the pressing mechanism 2 are assembled on the adjustment plate 5. This design enables the test mechanism 3 and the pressing mechanism 2 to adjust their respective heights in a state of being parallel and integrated with each other, so that the test mechanism 3 can preferentially contact the battery cell tab when pressing together with the pressing mechanism 2 as described in Embodiment 1, or the pressing mechanism 2 can preferentially contact the battery cell when pressing together with the test mechanism 3 as described in Embodiment 1.

[0094] In addition, the design of the adjustment plate 5 also enables the test mechanism 3 and the pressing mechanism 2 to adapt to battery cells of different sizes and shapes. By adjusting the first adjustment position 51 and the second adjustment position 52 on the adjustment plate 5, the test mechanism 3 and the pressing mechanism 2 can adapt to battery cells of different specifications, expanding the applicable range of the device.

[0095] For those that are the same as Embodiment 4, they will not be elaborated in this embodiment.

[0096] Embodiment 6

[0097] As Figure 1-7 shown, different from Embodiment 1, the control mechanism 4 of this embodiment further includes a switch 41 for controlling the relay, which can preferably be a foot switch, a wireless switch, etc. In practical applications, the switch 41 in the control mechanism 4 provides an operator with a convenient operation method. The operator only needs to step on the switch 41 to control the opening and closing of the relay, thereby controlling the working state of the test mechanism 3. This design not only simplifies the operation process, improves work efficiency, but also reduces the operation difficulty, enabling the operator to more easily perform the internal resistance jump test work. The working principle and operation are as follows:

[0098] 1. When the switch 41 is stepped on, the intermediate relay receives the instruction, and the air cylinder immediately presses down the detection tool to start collecting the resistance and voltage data of the battery cell.

[0099] 2. After the switch 41 starts, the delay relay starts timing. After 2S, the delay relay is powered on, and the air cylinder presses down, and the detection tool collects the resistance and voltage data of the battery cell for the second time.

[0100] 3. After the switch 41 is stepped on, the instructions of 1 and 2 are executed, and when released, the power supply is disconnected (when the delay is not over, it is cancelled synchronously when released).

[0101] As can be seen from the above, the design of Embodiment 6 brings convenience in operation to the internal resistance jump detection device. By introducing the switch 41, the operator can more intuitively control the detection process, reduce complex operation steps, and improve work efficiency.

[0102] In addition, the control mechanism 4 can also include other control elements, such as switches, buttons, etc., for realizing different control functions. These control elements can cooperate with the switch 41 to jointly complete the control work of the internal resistance jump detection device. At the same time, the control mechanism 4 can also communicate with the upper computer or other intelligent devices to realize functions such as remote control and data transmission, further improving the automation and intelligence level of the test.

[0103] For the rest that is the same as Embodiment 1, it will not be elaborated in this embodiment.

[0104] The above is only the preferred embodiment of the present utility model and is not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An internal resistance jump test device, characterized in that: It comprises a support mechanism (1) for carrying a cell to be tested, a clamping mechanism (2) mounted on the support mechanism (1) and fixing the cell to be tested, a testing mechanism (3) working in cooperation with the clamping mechanism (2), and a control mechanism (4) for controlling the operation of the clamping mechanism (2) and the testing mechanism (3); The control mechanism (4) has relays electrically connected to the pressing mechanism (2) and the testing mechanism (3), and the relays include an intermediate relay and a time delay relay coordinated with the intermediate relay.

2. The internal resistance jump test device according to claim 1, characterized in that: The support mechanism (1) comprises a support platform (11), a top stopper (12) and a side stopper (13); the top stopper (12) and the side stopper (13) are both mounted on the support platform (11); the top stopper (12) and the side stopper (13) are vertically assembled so that the support platform (11) forms a fixed area (14).

3. The internal resistance jump test device according to claim 2, characterized in that: A notch (15) is provided in the fixing area (14) of the support platform (11).

4. The internal resistance jump test device according to claim 2, characterized in that: The support platform (11) is provided with an adjustment hole (111) for adjusting the position of the top edge stopper (12) and the side edge stopper (13).

5. The internal resistance jump test device according to claim 2, characterized in that: The support platform (11) is provided with a scale line (16) for adjusting the position of the side stopper (13).

6. The internal resistance jump test device according to claim 2, characterized in that: The clamping mechanism (2) comprises a first driving member (21) and a pressing block (22) connected to an output end of the first driving member (21), wherein the pressing block (22) corresponds to the fixing area (14).

7. The internal resistance jump test device according to claim 6, characterized in that: The testing mechanism (3) comprises a second driving member (31), a buffer structure (32) connected to the output end of the second driving member (31), and a testing portion (33) installed at the end of the buffer structure (32); the second driving member (31) is arranged in parallel with the first driving member (21); the testing portion (33) corresponds to the pressing block (22), and the distance between them and the support platform (11) is equivalent.

8. The internal resistance jump test device according to claim 7, characterized in that: The buffer structure (32) comprises a connecting member (311) connected to the output end of the second driving member (31), a linear bearing (34) arranged at the end of the connecting member (311), a guide column (35) slidably connected to the linear bearing (34), a spring (36) sleeved on the guide column (35) and a base (37) fixedly connected to the guide column (35), and the testing part (33) is installed on the base (37).

9. The internal resistance jump test device according to claim 7 or 8, characterized in that: The testing portion (33) comprises a testing board (331), two contact portions (332) arranged on the testing board (331), and an insulating sheet (333) spaced between two adjacent contact portions (332).

10. The internal resistance jump test device according to claim 1, characterized in that: The control mechanism (4) further comprises a switch (41) for controlling the relay.

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