Battery performance detection tool
By designing a tool for battery performance detection, using pole columns instead of Busbar welding, and separating pole columns through fixtures, the problems of poor welding of battery cells and liquid leakage are solved, which improves detection efficiency and safety and reduces costs.
Patent Information
- Application Number
- CN202421501829.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-06-27
AI Technical Summary
During the battery performance detection process, poor welding of batteries with smaller battery poles and leakage of liquid in the battery cell are common, resulting in low detection efficiency and high cost.
A battery performance detection tool is designed, using positive electrode pillars and negative electrode pillars instead of Busbar welding, fixing the battery and the pole pillars through a fixing device, and separating the positive electrode pillars from the negative electrode pillars to reduce the possibility of external short circuits.
The tooling avoids the problems of poor welding and cell leakage, improves the efficiency and safety of battery performance detection, and reduces the detection cost, because the pole connecting method does not involve disposable consumables.
Smart Images
Figure CN222926758U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of battery performance detection, and particularly to a battery performance detection tooling. Background Art
[0002] During the battery performance detection process, a busbar can be welded to the positive and negative electrodes of the battery respectively, and then the welded battery cells are connected to the test equipment using an adapter or fixture, and various electrical performance tests are performed, such as open circuit voltage, internal resistance, capacity, charge and discharge cycles, etc.
[0003] However, the sizes of the positive and negative electrodes of the battery are not fixed. For a battery with a relatively small electrode post of the battery cell, poor welding and battery cell leakage may occur during welding. Therefore, there is an urgent need for a battery performance detection tooling to optimize the battery performance detection process and improve the battery performance detection efficiency. Summary of the Utility Model
[0004] In view of this, this application discloses a battery performance detection tooling to improve the battery performance detection efficiency.
[0005] In a first aspect, this application provides a battery performance detection tooling, including: a base configured to place the battery to be detected; a positive electrode post configured to connect to the positive electrode of the battery cell of the battery to be detected; a negative electrode post configured to connect to the negative electrode of the battery cell of the battery to be detected; a fixing device configured to fix the battery to be detected and the base; the fixing device is further configured to fix the battery to be detected to the positive electrode post and the negative electrode post respectively, and separate the positive electrode post from the negative electrode post.
[0006] Optionally, the periphery of the positive electrode post is wrapped with an insulating material.
[0007] Optionally, the positive electrode post and the negative electrode post have the same volume.
[0008] Optionally, the battery to be detected is a single-cell cylindrical battery, the base has a circular groove, and the circular groove matches the bottom of the battery to be detected.
[0009] Optionally, the fixing device includes: a limiting rod and an upper cover plate; the first end of the limiting rod is connected to the base, and the second end of the limiting rod is connected to the upper cover plate; the upper cover plate covers the top of the battery to be detected, and the upper cover plate has a first opening and a second opening, the positive electrode post is connected to the positive electrode of the battery cell of the battery to be detected through the first opening, and the negative electrode post is connected to the negative electrode of the battery cell of the battery to be detected through the second opening.
[0010] Optionally, an insulating material is provided at a position where the first opening is close to the battery to be detected.
[0011] Optionally, the upper cover plate has a through hole, and the second end of the limiting rod has an external thread; the second end of the limiting rod passes through the upper cover plate and is fixed to the upper cover plate by a nut.
[0012] Optionally, the fixing device includes a first number of limiting rods, and the upper cover plate has a first number of through holes, where the first number is greater than or equal to 1; the first number of limiting rods respectively pass through their corresponding first number of through holes.
[0013] Optionally, the first number is 4, and the distances between the 4 limiting rods are equal.
[0014] Optionally, the battery performance detection tooling includes a second number of bases, a second number of positive electrode posts, a second number of negative electrode posts, and a second number of fixing devices, which are respectively used to detect the performance of the second number of batteries to be detected, and the second number is greater than 1.
[0015] The battery performance detection tooling provided by this application has at least the following beneficial effects:
[0016] (1) After using the battery performance detection tooling provided by this application, during the entire battery performance detection process, the connection of the electrode posts in the tooling replaces the Busbar welding process, so problems such as poor welding or battery leakage will not occur, thus saving the overall detection time and improving the battery performance detection efficiency;
[0017] (2) The positive electrode post and the negative electrode post are separated by the fixing device, so the possibility of external short circuit is reduced;
[0018] (3) Compared with using Busbar welding in the prior art, the used Busbar usually cannot be used again, while there are no disposable consumables in the electrode post connection method of this application, and all components can be reused repeatedly, thus saving the detection cost. Description of the Drawings
[0019] The following briefly introduces the drawings used in the description of the embodiments of this application:
[0020] Figure 1 It is a schematic structural diagram of a battery performance detection tooling provided by an embodiment of this application;
[0021] Figure 2 It is a schematic structural diagram of another battery performance detection tooling provided by an embodiment of this application;
[0022] Figure 3 It is a schematic structural diagram of yet another battery performance detection tooling provided by an embodiment of this application.
[0023] In the figure: 110 - base, 120 - positive electrode post, 130 - negative electrode post, 140 - fixing device, 150 - nut, 200 - battery to be detected. Detailed Embodiments
[0024] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will describe the specific implementation manners of the present application with reference to the accompanying drawings. The accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other implementation manners can also be obtained. Adjustments and improvements made without departing from the concept of the present application all fall within the protection scope of the present application.
[0025] To make the drawings concise, only the parts related to the corresponding embodiments are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only some of the components with the same structure or function are schematically shown, and there may actually be more or fewer components with the same structure or function.
[0026] In the present application, unless otherwise clearly specified and limited, ordinal numbers, such as "first", "second", etc., are only used to distinguish and describe related objects, and cannot be understood as indicating or implying the relative importance or order between related objects; in addition, they do not represent the quantity of related objects. "Multiple" includes two or more, and other quantifiers are similar. " / " is used to describe the relationship between related objects, which means the "or" relationship between related objects. "And / or" is used to describe the relationship between related objects, which includes any combination relationship between related objects. For example, "a and / or b" includes: "a alone", "b alone", or "a and b". "One or more" or "at least one" among multiple objects refers to any object or any combination of multiple objects. For example, "one or more of a1, a2, a3" or "at least one of a1, a2, a3" includes: "a1 alone", "a2 alone", "a3 alone", "a1 and a2", "a1 and a3", "a2 and a3", or "a1, a2 and a3".
[0027] In industry, battery performance testing is of great significance. For example, it ensures battery safety to prevent accidents, verifies whether the battery protection circuit is effective in extreme cases, improves the quality and reliability of batteries to screen out non-compliant batteries. During the battery performance testing process, R & D personnel may also identify factors affecting battery life and optimize the battery design and manufacturing process to extend the battery life. In addition, battery performance testing is an important means to ensure that products meet industry standards and regulatory requirements, such as IEC, UL and other standards, enabling products to be legally sold in the market. Moreover, many markets and customers require performance test reports to verify the quality and safety of products. Battery performance testing is the key to obtaining market access. In short, battery performance testing plays a crucial role in ensuring product safety, improving quality and reliability, supporting product development and improvement, meeting regulatory requirements, reducing costs and risks, and promoting sustainable development. It is not only the basis for ensuring the quality of battery products, but also an important means to promote battery technology progress and industry development.
[0028] Regarding the content of battery performance testing, it includes but is not limited to test processes such as electrical performance testing, thermal performance testing, mechanical performance testing, environmental adaptability testing, safety testing, and electrochemical testing. Among them, taking the most commonly used electrical performance testing as an example, it includes measuring the voltage of the battery when no load is connected (i.e., open-circuit voltage) to check the initial state of the battery and determine whether there are internal short circuits or other problems; measuring the AC and DC internal resistances of the battery to evaluate the health status of the battery and the performance of the internal electrode materials; measuring the actual discharge capacity of the battery through constant-current discharge to determine the energy storage capacity of the battery and ensure that it meets the design requirements; evaluating the battery life and cycle stability by performing multiple charge-discharge cycles of the battery to determine its performance during long-term use; and measuring the performance of the battery at a higher discharge current to evaluate the performance and stability of the battery in high-power applications.
[0029] In the prior art, during the battery performance testing process, Busbar welding is usually involved. A common test process is as follows: First, weld the Busbar to the positive and negative electrodes of the battery cell to be tested respectively to ensure firmness and good conductivity; then use an adapter or fixture to connect the welded battery cell to the test equipment; then perform various electrical performance tests, such as open-circuit voltage, internal resistance, capacity, charge-discharge cycle, etc.; finally, record the test data, conduct analysis and evaluation to ensure that the battery cell meets the expected performance and quality standards.
[0030] However, the sizes of the positive and negative electrodes of the battery are not fixed. For a battery with a relatively small electrode post of the battery cell, such as in the case of a single cylindrical battery cell, poor welding may occur during welding, and battery leakage may occur at the welding site. During the detection process, it is found that due to the close distance between the positive and negative Busbars, there is an external short circuit of the battery cell, which affects the detection result. Moreover, the positive and negative Busbars are consumables, which will increase the detection cost; and the welding process is relatively complex, affecting the production efficiency and increasing the detection time. Therefore, there is an urgent need for a battery performance detection tooling to optimize the battery performance detection process and improve the battery performance detection efficiency.
[0031] Based on the above, the concept of this application is: during the battery performance detection process, replace the original Busbar welding with other devices or processes to improve the battery performance detection efficiency on the basis of ensuring that the battery performance detection process is not affected.
[0032] In one embodiment, please refer to Figure 1 , which shows a schematic structural diagram of a battery performance detection tooling provided by an embodiment of this application. As Figure 1 shown, a battery performance detection tooling includes: a base 110 configured to place the battery 200 to be detected; a positive electrode post 120 configured to connect to the positive electrode of the battery cell of the battery 200 to be detected; a negative electrode post 130 configured to connect to the negative electrode of the battery cell of the battery 200 to be detected; a fixing device 140 configured to fix the battery 200 to be detected and the base 110; the fixing device 140 is further configured to fix the battery 200 to be detected to the positive electrode post 120 and the negative electrode post 130 respectively, and separate the positive electrode post 120 from the negative electrode post 130.
[0033] In this embodiment, the battery 200 to be detected is placed on the base 110, which can keep it in an upright state during the performance detection process, facilitating the connection of the positive electrode post 120 and the negative electrode post 130 to the positive electrode of the battery cell and the negative electrode of the battery cell of the battery 200 to be detected respectively. Exemplarily, nickel (Ni) or nickel-plated materials can be used to manufacture the positive electrode post because of its excellent corrosion resistance and suitability for high-potential environments; correspondingly, copper-plated materials or pure copper materials can be used to manufacture the negative electrode post because copper has better electrical conductivity and is suitable for low-potential environments. Further, when designing and producing the positive electrode post 120 and the negative electrode post 130, they can be designed to be of similar sizes, that is, their volumes are similar. In this way, the overcurrent capabilities of the positive electrode post 120 and the negative electrode post 130 can be made comparable. The overcurrent capability refers to the ability of the battery to withstand high-current discharge or charge in a short period of time. For a battery, the overcurrent capability is an important performance index, which directly affects its performance and safety in high-power applications. The volume sizes of the positive electrode post 120 and the negative electrode post 130 are basically the same, that is, the overcurrent areas are the same, which can make the overcurrents of the positive and negative electrodes consistent and improve the efficiency of battery performance detection. In some embodiments, please refer to Figure 2 , which shows a schematic structural diagram of another battery performance detection tool provided by the embodiment of the present application. Figure 2 It is a front view of the assembled battery performance detection tool. Taking the single-cell cylindrical battery shown in the figure as an example, the positive electrode post 120 can be arranged above the positive electrode of the battery cell of the battery 200 to be detected, and the negative electrode post 130 can be arranged above the battery cell housing of the battery 200 to be detected. The battery cell housing can serve as the negative electrode of the battery cell of the battery 200 to be detected. The battery performance detection tool further includes a fixing device 140, which is used to fix the battery 200 to be detected and the base 110 together to prevent the battery 200 to be detected from detaching from the tool during the battery performance detection process. In this way, the stability of battery performance detection is improved. In addition, the fixing device 140 is also used to fix the battery 200 to be detected, the positive electrode post 120 and the negative electrode post 130 together, and separate the positive electrode post 120 and the negative electrode post 130, that is, to make the positive electrode post 120 and the negative electrode post 130 not connected, reducing the possibility of external short circuit during the battery performance detection process. It should be noted that the fixing device 140 can have various forms and is not limited to the forms shown in Figure 1 and Figure 2 shown.
[0034] During the process of battery performance detection, first place the battery 200 to be detected into the base 110, and then the positive electrode terminal 120, the negative electrode terminal 130, and the fixing device 140 can be successively installed, or the positive electrode terminal 120 and the negative electrode terminal 130 can be pre-installed in the fixing device 140. Finally, connect the fixing device 140 to the base 110 to complete the assembly of the battery performance detection tooling. After the assembly is completed, the positive electrode terminal 120 and the negative electrode terminal 130 are respectively connected to the external circuit, and then the battery performance detection can be carried out. After the detection is completed, disassemble the battery performance detection tooling in sequence, and then the battery 200 to be detected that has completed the test can be taken out. In this way, a battery performance detection process is completed.
[0035] As can be seen from the above battery performance detection process, since the connection of the electrode terminals in the tooling replaces the Busbar welding process, problems such as poor welding or electrolyte leakage at the welding site will not occur during the entire process. In this way, the overall detection time is saved, and the damage to the battery caused by operation errors is also reduced, improving the battery performance detection efficiency. Moreover, compared with the use of Busbar welding in the prior art, the used Busbar usually cannot be used again, while there are no disposable consumables in the electrode terminal connection method of this application, and all components (base, positive electrode terminal, negative electrode terminal, and fixing device) can be reused, thus saving the detection cost. In addition, the positive electrode terminal and the negative electrode terminal are separated by the fixing device, which reduces the possibility of external short circuit and improves the safety of the detection process.
[0036] In some embodiments, the volumes of the positive electrode terminal and the negative electrode terminal can be set to be equal. As mentioned in the above embodiments, the positive electrode terminal and the negative electrode terminal are designed to be of similar sizes, that is, their volumes are close. In this way, the current-carrying capacities of the positive electrode terminal and the negative electrode terminal can be made equivalent. In this embodiment, directly setting the volumes of the positive electrode terminal and the negative electrode terminal to be the same can facilitate their mass production and better balance the current-carrying capacities of the positive electrode terminal and the negative electrode terminal. During the manufacturing process, the positive electrode terminal and the negative electrode terminal can also be respectively painted to distinguish them from each other.
[0037] In some embodiments, the battery to be detected is a single-cell cylindrical battery, and the base has a circular groove, and the circular groove matches the bottom of the battery to be detected. Please continue to refer to Figure 1 , a circular groove is provided in the base 110, which matches the bottom of the battery 200 to be detected, so that the battery 200 to be detected can be stably placed in the base 110; and the design of the groove can also play a role in fixing the battery 200 to be detected. Cooperating with the fixing device 140, the battery 200 to be detected can be better fixed in the battery performance detection tooling, improving the efficiency of battery performance detection.
[0038] In some embodiments, the fixing device includes a limiting rod and an upper cover plate; the first end of the limiting rod is connected to the base, and the second end of the limiting rod is connected to the upper cover plate; the upper cover plate covers the top of the battery to be detected, and the upper cover plate has a first opening and a second opening, the positive electrode terminal is connected to the positive electrode of the battery to be detected through the first opening, and the negative electrode terminal is connected to the negative electrode of the battery to be detected through the second opening.
[0039] Please continue to refer to Figure 1 , the fixing device 140 includes a limiting rod and an upper cover plate. The number of limiting rods can be set according to actual needs and is not limited here. Exemplarily, the number of limiting rods can be greater than or equal to 3, and the distance between each limiting rod is equal. In this way, during the battery performance detection process, the movement of the battery 200 to be detected can be restricted, improving the battery performance detection efficiency. In some embodiments, as Figure 1 shown, the fixing device includes 4 limiting rods, and the distances between the 4 limiting rods are equal. The 4 limiting rods are arranged at equal intervals to form a square. When the battery 200 to be detected is a cylindrical battery, geometrically speaking, the square formed by the 4 limiting rods is equivalent to the circumscribed square of the circle. Such a structural design can make the fixing effect of the fixing device 140 better.
[0040] When connecting, the first end of the limiting column can be connected to the base 110, the second end of the limiting column can be connected to the upper cover plate, and the upper cover plate covers the top of the battery 200 to be detected. The first end of the limiting rod can be connected to the base 110 by means of threaded connection, where the first end of the limiting rod has an external thread and the base 110 has an internal thread. The upper cover plate has a first opening and a second opening. The positive electrode terminal 120 is connected to the positive electrode of the core of the battery 200 to be detected through the first opening, and the negative electrode terminal 130 is connected to the negative electrode of the core of the battery 200 to be detected through the second opening. In this way, when assembling the battery performance detection tooling, the limiting column can be fixed to the base 110 first, the positive electrode terminal 120 and the negative electrode terminal 130 can be inserted into the upper cover plate, and then the upper cover plate can be connected to the limiting column. For a single-core cylindrical battery, its core positive electrode is located at the center of its upper surface, and the core negative electrode is located on the core housing; therefore, the first opening of the upper cover plate is aligned with the center of the upper surface of the battery 200 to be detected, the second opening of the upper cover plate is aligned with the edge part of the upper surface of the battery 200 to be detected (i.e., the core housing), and a certain distance is set between the first opening and the second opening to separate the inserted positive electrode terminal 120 and negative electrode terminal 130, avoiding short circuit of the external circuit.
[0041] In some embodiments, an insulating material is wrapped around the positive electrode terminal. Through the protection of the insulating material, short circuit of the external circuit can be further avoided. Exemplarily, please refer to Figure 3, which shows a schematic structural diagram of another battery performance detection tooling provided by the embodiments of the present application. Figure 3 It is equivalent to a cross-sectional view of the battery performance detection tooling of the present application. As Figure 3 shown, an insulating material can be provided at a position where the first opening is close to the battery 200 to be detected. Through the protection of the insulating material, the occurrence of short circuit in the external circuit can be further avoided.
[0042] In some embodiments, the upper cover plate has through holes, and the second end of the limiting rod has an external thread; the second end of the limiting rod passes through the upper cover plate and is fixed to the upper cover plate by a nut. The fixing device includes a first number of limiting rods, and the upper cover plate has a first number of through holes, and the first number is greater than or equal to 1; the first number of limiting rods respectively pass through their corresponding first number of through holes. Please continue to refer to Figure 1 , in the figure, 4 limiting rods respectively correspond to 4 through holes on the upper cover plate and 4 corresponding nuts 150. After the limiting rod passes through the corresponding through hole on the upper cover plate, the nut 150 is used to fix the second end of the limiting rod and the upper cover plate together in a threaded connection manner. In this way, the connection between the limiting rod and the upper cover plate is made more firm.
[0043] In some embodiments, the battery performance detection tooling includes a second number of bases, a second number of positive electrode posts, a second number of negative electrode posts and a second number of fixing devices, which are respectively used to detect the performance of the second number of batteries to be detected, and the second number is greater than 1.
[0044] As shown in the accompanying drawings, for a battery performance detection tooling, it can detect the performance of multiple batteries at the same time, and the tooling for each battery to be detected is consistent. In this way, the efficiency of performance detection can be improved.
[0045] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts that are not described in detail or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. In addition, the above embodiments can be freely combined as needed.
Claims
1. A battery performance testing tool, characterized in that: include: a base configured to place a battery to be tested; A positive electrode column, configured to be connected to the positive electrode of the battery cell to be tested; A negative electrode column, configured to be connected to the negative electrode of the battery cell to be tested; A fixing device, configured to fix the battery to be tested and the base; The fixing device is also configured to fix the battery to be tested to the positive electrode column and the negative electrode column respectively, and to separate the positive electrode column from the negative electrode column.
2. The battery performance testing tool according to claim 1, characterized in that: The outer periphery of the positive electrode column is wrapped with insulating material.
3. The battery performance testing tool according to claim 1, characterized in that: The volumes of the positive electrode column and the negative electrode column are equal.
4. The battery performance testing tool according to claim 1, characterized in that: The battery to be tested is a single-cell cylindrical battery, the base has a circular groove, and the circular groove matches the bottom of the battery to be tested.
5. The battery performance testing tool according to claim 1, characterized in that: The fixing device comprises: a limiting rod and an upper cover plate; The first end of the limiting rod is connected to the base, and the second end of the limiting rod is connected to the upper cover plate; The upper cover plate covers the top of the battery to be tested, and the upper cover plate has a first opening and a second opening, the positive electrode column is connected to the positive electrode of the battery cell to be tested through the first opening, and the negative electrode column is connected to the negative electrode of the battery cell to be tested through the second opening.
6. The battery performance testing tool according to claim 5, characterized in that: An insulating material is disposed at a portion of the first opening close to the battery to be tested.
7. The battery performance testing tool according to claim 5, characterized in that: The upper cover plate has a through hole, and the second end of the limiting rod has an external thread; The second end of the limiting rod passes through the upper cover plate and is fixed to the upper cover plate by a nut.
8. The battery performance testing tool according to claim 7, characterized in that: The fixing device includes a first number of limiting rods, and the upper cover plate has the first number of through holes, the first number being greater than or equal to 1; The first number of limiting rods respectively pass through the first number of through holes corresponding to each other.
9. The battery performance testing tool according to claim 8, characterized in that: The first number is 4, and the distances between the 4 limiting rods are equal.
10. The battery performance testing tool according to any one of claims 1 to 9, characterized in that: It includes a second number of bases, a second number of positive poles, a second number of negative poles and a second number of fixing devices, which are respectively used to detect the performance of a second number of batteries to be detected, and the second number is greater than 1.