A battery electrical performance detection device

Abstract

The utility model relates to battery detection technical field especially, and it is the structural optimization design of detection device, a battery electric performance detection device, including fixed platform, is equipped with detection subassembly and the adjustable fixed component for installing the measured battery on fixed platform, and detection subassembly includes positive pole binding post, negative pole binding post and two mobile sliding blocks, two mobile sliding blocks are connected with positive pole binding post and negative pole binding post respectively, for driving positive pole binding post and negative pole binding post along fixed platform to the positive pole port and negative pole port of measured battery movement, and the busbar through colloid viscosity is equipped with between positive pole binding post and positive pole port, negative pole binding post and negative pole port.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and in particular to the structural optimization design of a testing device. Background Technology

[0002] As a core component of electronic mobile devices, the performance testing of batteries is crucial to the safety and lifespan of these devices. Taking lithium batteries as an example, their testing needs to cover multiple dimensions, including physical characteristics, electrochemical performance, and safety risks. Traditional testing methods include visual inspection, dimensional measurement, and basic electrical parameter testing, while also requiring extreme tests such as overcharge and over-discharge, short circuits, and nail penetration to verify safety boundaries.

[0003] In traditional testing methods, a busbar is welded externally to the battery terminals for testing. Alternatively, existing technologies, such as the technical solution proposed in Chinese patent document CN106125009B, acquire the current charge level in real time during battery charging and dynamically select the corresponding testing method accordingly. By combining electrical disturbance operation and magnetic field relaxation time measurement, a database of K value and magnetic field relaxation time is established. The K value of the battery under test is determined by query matching, thereby judging its qualification and performance level.

[0004] However, the aforementioned existing technologies have significant drawbacks. For traditional busbar welding methods, poor welding can easily lead to excessively high test temperatures, limited capacity utilization, and increased errors in electrical performance data. More seriously, poor welding can cause cell thickening, accelerated lithium plating, and uncontrolled expansion during testing, directly shortening battery cycle life. Furthermore, cells that have completed testing must be scrapped because the busbar cannot be removed, resulting in resource waste. Regarding the technical solution in patent CN106125009B, firstly, the detection accuracy is limited by the singular nature of the charging conditions, failing to cover the battery's performance during the discharge phase or under dynamic loads, leading to incomplete evaluation results. Secondly, the hardware complexity is high, and the need for real-time power monitoring and detection mode switching increases system costs, hindering large-scale application. Utility Model Content

[0005] To overcome the shortcomings of the prior art, a battery electrical performance testing device is provided.

[0006] This utility model is achieved through the following technical solution: a battery electrical performance testing device, including a fixed platform, a testing component and an adjustable fixing component for mounting the battery under test on the fixed platform, the testing component including a positive terminal, a negative terminal and two movable sliders; the two movable sliders are respectively connected to the positive terminal and the negative terminal, and are used to drive the positive terminal and the negative terminal to move along the fixed platform toward the positive port and the negative port of the battery under test; a busbar is provided between the positive terminal and the positive port, and between the negative terminal and the negative port, by adhesive bonding.

[0007] The aforementioned device employs an adhesive bonding process instead of traditional welding, enabling a detachable connection between the busbar and the battery port. After testing, the busbar can be easily removed, avoiding cell scrapping issues caused by welding and significantly reducing resource waste. The adhesive bonding process ensures consistent conductivity at the contact surface through uniform pressure distribution (driven by a moving slider), reducing problems such as localized overheating (excessive temperature rise), limited capacity utilization, and increased errors in electrical performance data caused by poor welding. Furthermore, the adjustable fixing component precisely controls the contact pressure between the busbar and the battery port, avoiding cell damage caused by mechanical stress during traditional welding.

[0008] The movable slider-driven positive and negative terminal design allows for flexible adjustment of contact positions on a fixed platform, adapting to different battery sizes and dynamic load testing requirements. Replacing complex monitoring systems with mechanical contacts reduces hardware complexity and cost. Eliminating welding equipment and complex monitoring circuits, and employing a basic mechanical structure (moving slider + adhesive bonding process), significantly reduces equipment manufacturing costs and maintenance difficulty, facilitating large-scale application.

[0009] In a preferred embodiment of this utility model, the adjustable fixing component includes a lower fixing plate and a tab fixing port; the battery under test is assembled between the lower fixing plate and the tab fixing port; the tab fixing port is used to fix the positive and negative terminals of the battery under test.

[0010] In a preferred embodiment of this utility model, the detection component further includes a voltage acquisition module built into the positive terminal and the negative terminal respectively. The voltage acquisition module is used to monitor the change of battery SOC in real time.

[0011] In a preferred embodiment of this utility model, the lower fixing plate is slidably connected to the fixing platform through a guide rail structure, and its movement direction is parallel to the length direction of the battery.

[0012] In a preferred embodiment of this utility model, one end of the positive terminal and the negative terminal are respectively embedded in two movable sliders.

[0013] In a preferred embodiment of this utility model, a SOC calculation unit is also included, which is connected to the voltage acquisition module via a data line.

[0014] In a preferred embodiment of this utility model, the busbar is a replaceable copper busbar, and the shape of its contact end face matches the fixed port of the electrode tab.

[0015] In a preferred embodiment of this utility model, the surface of the lower fixed plate slider is provided with a positioning groove, and an elastic rubber pad is embedded in the positioning groove.

[0016] In a preferred embodiment of this utility model, the electrode fixing port includes a positive electrode fixing port and a negative electrode fixing port, and the positive electrode fixing port and the positive terminal, as well as the negative electrode fixing port and the negative terminal, are all on the same axis.

[0017] In a preferred embodiment of this utility model, a temperature sensor is also included, which is attached to the contact surface of the positive terminal and the negative terminal.

[0018] Compared with the prior art, the present invention has the following beneficial effects: A simple device for testing the electrical performance of square aluminum-cased batteries avoids structural damage and performance degradation caused by welding (such as excessive temperature rise, capacity limitation, and accelerated lithium plating), while enabling the busbar to be reused and reducing resource waste. Adhesive bonding improves contact stability and reduces errors in electrical performance data, making it suitable for batteries of different sizes and busbar types.

[0019] Furthermore, the battery under test is held in place by a lower fixing plate and a tab fixing port, and the positive and negative terminals are fixed by mechanical pressure. This ensures the battery's stable position during testing, prevents poor contact or data fluctuations caused by movement, and improves testing reliability. The tab fixing ports are clearly divided (positive / negative), simplifying the operation process.

[0020] Furthermore, a voltage acquisition module is embedded within the positive and negative terminals to directly acquire the battery terminal voltage and transmit it to an external system. This allows for real-time monitoring of SOC changes and supports dynamic monitoring across all charging and discharging conditions.

[0021] Furthermore, the lower fixing plate can be adapted to the fixing requirements of batteries of different lengths. The position can be precisely adjusted through the guide rail, which improves the versatility of the device, reduces the adaptation problems caused by battery size differences, and lowers the equipment replacement cost.

[0022] Furthermore, the embedded design reduces the exposed portion of the terminals, lowering the risk of damage due to collisions or misoperation, while also simplifying the overall layout of the device and improving space utilization.

[0023] Furthermore, it enables real-time quantitative display of SOC, supports performance evaluation under dynamic loads, overcomes the shortcomings of traditional methods that can only monitor statically, and provides data support for battery health management.

[0024] Furthermore, the replaceable busbar is compatible with various busbar types (such as L-shaped and straight bar types), reducing contact errors caused by busbar shape mismatch; the high conductivity of the copper busbar reduces energy loss, improves detection accuracy, and facilitates maintenance and replacement.

[0025] Furthermore, the positioning groove ensures quick and accurate battery placement, while the rubber pad provides cushioning and anti-slip properties, reducing battery displacement caused by vibration or movement during testing, protecting the battery's structural integrity, and improving testing stability.

[0026] Furthermore, ensuring precise alignment between the terminals and the battery ports reduces contact resistance caused by lateral deviation, improves voltage acquisition consistency, and avoids data errors or localized overheating caused by misalignment.

[0027] Furthermore, it provides early warning of abnormal temperature rises caused by poor contact or overcurrent, preventing battery thermal runaway or damage to testing equipment and improving testing safety; at the same time, it provides data for analyzing the correlation between temperature rise and battery performance, and optimizes testing parameters.

[0028] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a battery electrical performance testing device according to the present invention; The annotations in the attached figures are explained as follows: Fixed platform 1, detection component 2, battery under test 3, adjustable fixed component 4, busbar 5, positive terminal 21, negative terminal 22, movable slider 23, lower fixed plate 41, tab fixing port 42, positive tab fixing port 421, negative tab fixing port 422. Detailed Implementation

[0030] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0031] In the following description, terms such as “inner,” “outer,” “upper,” “lower,” “left,” and “right” are used only to facilitate the description of the embodiments and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] like Figure 1 As shown, the battery electrical performance testing device provided in this embodiment consists of a fixed platform 1, a testing component 2, an adjustable fixing component 4, and a busbar 5. The fixed platform 1 serves as the basic support structure, on which the testing component 2 and the adjustable fixing component 4 are integrated.

[0033] The testing component 2 includes a positive terminal 21, a negative terminal 22, and two movable sliders 23. The positive terminal 21 and the negative terminal 22 are respectively embedded in the movable sliders 23. By moving the sliders along the guide rail of the fixed platform 1, precise docking with the positive and negative terminals of the battery under test 3 is achieved. The adjustable fixing component 4 consists of a lower fixing plate 41 and a tab fixing port 42. The lower fixing plate 41 is slidably connected to the fixed platform 1 through the guide rail structure. The moving direction is parallel to the length direction of the battery. Its surface is provided with a positioning groove with an elastic rubber pad. The battery under test 3 is assembled between the lower fixing plate 41 and the tab fixing port 42. The positive and negative terminals of the battery under test 3 are fixed by the positive tab fixing port 421 and the negative tab fixing port 422 of the tab fixing port 42, respectively.

[0034] In practice, the operator first places the battery 3 to be tested on the fixed platform 1, aligning the positive and negative terminals with the positive tab fixing ports 421 and 422 of the tab fixing ports 42. Then, the lower fixing plate 41 is moved along the guide rail towards the battery 3 until it is fixed in the positioning groove on the other side of the battery 3. An elastic rubber pad provides cushioning and prevents slippage. At this point, the busbar 5 is glued to the positive tab fixing ports 421 and 422 using adhesive. Next, the slider 23 drives the positive terminal 21 and negative terminal 22 towards the battery ports until the terminals are in complete contact with the busbar 5 glued to the tab fixing ports 42, forming a stable conductive connection. The busbar 5 uses a replaceable copper busbar design, and its contact end face shape matches the tab fixing ports 42, ensuring low contact resistance and high conductivity.

[0035] During testing, the voltage acquisition module built into the positive terminal 21 and negative terminal 22 collects the battery terminal voltage in real time and transmits it to the SOC calculation unit via a data cable. The SOC calculation unit processes the data, calculates battery performance, and achieves dynamic monitoring of the entire charging and discharging process. Simultaneously, temperature sensors attached to the contact surfaces of the terminals monitor temperature rise in real time and provide early warnings of abnormal thermal conditions. After testing, busbar 5 is removed and any remaining gel residue is cleaned. The battery can be completely disassembled for reuse, and busbar 5 can also be reused for other tests.

[0036] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A battery electrical performance testing device, comprising a fixed platform (1), characterized in that, The fixed platform (1) is provided with a detection component (2) and an adjustable fixing component (4) for mounting the battery under test (3). The detection component (2) includes a positive terminal (21), a negative terminal (22) and two movable sliders (23). The two movable sliders (23) are respectively connected to the positive terminal (21) and the negative terminal (22) to drive the positive terminal (21) and the negative terminal (22) to move along the fixed platform (1) toward the positive port and the negative port of the battery under test (3). A busbar (5) is provided between the positive terminal (21) and the positive port, and between the negative terminal (22) and the negative port, by adhesive bonding.

2. The battery electrical performance testing device according to claim 1, characterized in that, The adjustable fixing assembly (4) includes a lower fixing plate (41) and a tab fixing port (42); the battery under test (3) is assembled between the lower fixing plate (41) and the tab fixing port (42); the tab fixing port (42) is used to fix the positive and negative terminals of the battery under test (3).

3. The battery electrical performance testing device according to claim 1, characterized in that, The detection component (2) also includes a voltage acquisition module built into the positive terminal (21) and the negative terminal (22) respectively. The voltage acquisition module is used to monitor the change of battery SOC in real time.

4. The battery electrical performance testing device according to claim 2, characterized in that, The lower fixing plate (41) is slidably connected to the fixing platform (1) through a guide rail structure, and its movement direction is parallel to the length direction of the battery.

5. The battery electrical performance testing device according to claim 1, characterized in that, One end of the positive terminal (21) and the negative terminal (22) are respectively embedded in the two movable sliders (23).

6. The battery electrical performance testing device according to claim 3, characterized in that, It also includes a SOC calculation unit, which is connected to the voltage acquisition module via a data line.

7. The battery electrical performance testing device according to claim 1, characterized in that, The busbar (5) is a replaceable copper busbar, and its contact end face shape matches the electrode fixing port (42).

8. A battery electrical performance testing device according to claim 2, characterized in that, The lower fixing plate (41) has a positioning groove on its slider surface, and an elastic rubber pad is embedded in the positioning groove.

9. A battery electrical performance testing device according to claim 2, characterized in that, The electrode fixing port (42) includes a positive electrode fixing port (421) and a negative electrode fixing port (422). The positive electrode fixing port (421) and the positive terminal (21), and the negative electrode fixing port (422) and the negative terminal (22) are all on the same axis.

10. A battery electrical performance testing device according to claim 1, characterized in that, It also includes a temperature sensor, which is attached to the contact surface between the positive terminal (21) and the negative terminal (22).

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