Probe assembly and formation and capacity grading device
By designing a probe assembly including the first and second elastic parts, the problem of crushing the surface of the battery core column caused by excessive pressure in the melting component capacitance process is solved, and more stable data acquisition and battery cell protection are achieved.
Patent Information
- Application Number
- CN202421536599.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-01
AI Technical Summary
In the prior art, the probe is exerted too much pressure in the ingredient capacitance process, resulting in the problem of crushing the surface of the battery core pole.
A probe assembly is designed, including a probe holder and at least one probe. The probe holder is provided with a first elastic member and a second elastic member. The elastic coefficient of the first elastic member is less than the elastic coefficient of the second elastic member. Through the cooperation of the first elastic member and the second elastic member, the probe is prevented from overpressure and damaging the surface of the pole column.
It effectively avoids the situation where the probe is overvoltage and damages the surface of the electrode column, ensuring the accuracy of data acquisition during the chemical component capacitance process and the integrity of the battery core pole.
Smart Images
Figure CN222825595U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical composition and capacity, and in particular to a probe component and a chemical composition and capacity device. Background Art
[0002] During the production process, battery cells need to go through a chemical composition and capacity division process. This process collects data by piercing different positions of the oxide layer of the battery cell pole with multiple probes. Specifically, multiple probes are installed on a mounting plate, and the mounting plate is driven to move, and the multiple probes are driven to move at the same time to pierce the oxide layer of the pole.
[0003] When the horizontal heights of multiple probes are different due to problems with the mounting plate, some of the probes have pierced the oxide layer of the pole while others have not. In order for all probes to pierce the oxide layer of the pole for data collection, the mounting plate needs to be pressed down further, which may cause some probes to damage the pole surface due to excessive pressure. Utility Model Content
[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect in the prior art that excessive pressure is applied to the probe, resulting in damage to the surface of the pole, thereby providing a probe assembly and a chemical content separation device.
[0005] In order to solve the above technical problems, the utility model provides a probe assembly, comprising:
[0006] A probe seat, on which a first elastic member is disposed, wherein the first elastic member has an elastic force that enables the probe seat to approach the battery cell to be tested;
[0007] At least one probe is arranged on the probe seat through a second elastic member, the second elastic member has an elastic force that makes the probe close to the battery cell to be tested, and the elastic coefficient of the first elastic member is smaller than the elastic coefficient of the second elastic member.
[0008] Optionally, it also includes:
[0009] A limiting member for limiting the position of the probe seat in an initial state;
[0010] When the probe seat is in an initial state, the first elastic member is in a compressed state, and the probe seat is pressed against the limiting member by the pre-compression force of the first elastic member.
[0011] Optionally, the magnitude of the pre-compression force is set to be the force required for the probe to pierce the electrode oxide layer of the battery cell to be tested.
[0012] Optionally, it also includes:
[0013] A guide post, on which the probe seat is slidably arranged.
[0014] Optionally, it also includes:
[0015] A connecting seat, the guide column is arranged on the connecting seat, one end of the first elastic member abuts against the connecting seat and the other end abuts against the probe seat.
[0016] Optionally, a guide cavity is provided in the probe seat, a needle rod of the probe is slidably disposed in the guide cavity, and the second elastic member is sleeved on the needle rod.
[0017] Optionally, both the first elastic member and the second elastic member are compression springs.
[0018] Optionally, there are at least two first elastic members, and each of the probes corresponds to at least two second elastic members.
[0019] The utility model also provides a chemical component storage device, comprising:
[0020] Mounting plate;
[0021] The probe assembly described in any one of the above items is arranged on the mounting plate.
[0022] Optionally, it also includes:
[0023] A driving member, an output end of which is connected to the middle portion of the mounting plate.
[0024] The technical solution of the utility model has the following advantages:
[0025] The probe assembly provided by the utility model comprises a probe seat and at least one probe, wherein a first elastic member is arranged on the probe seat, and the first elastic member has an elastic force which makes the probe seat close to the battery cell to be tested; the probe is arranged on the probe seat through a second elastic member, and the second elastic member has an elastic force which makes the probe close to the battery cell to be tested, and the elastic coefficient of the first elastic member is smaller than the elastic coefficient of the second elastic member.
[0026] The coordinated use of the first elastic member and the second elastic member prevents the probe from being over-pressed and damaging the pole surface. The specific analysis is as follows: when the probe assembly is moved downward by an external force, the probe first contacts the pole of the battery cell to be tested. Since the elastic coefficient of the first elastic member is smaller than that of the second elastic member, the first elastic member is more easily compressed. Therefore, under the condition of force, the first elastic member bears a larger deformation amount, and the second elastic member bears a smaller deformation amount. When the probe reaches the force F1 required to pierce the oxide layer of the pole of the battery cell to be tested, the oxide layer of the pole is pierced; if a part of the probe assembly is When the part is not punctured, the probe assembly continues to press down. When the punctured part of the probe contacts the surface of the pole, due to the presence of the first elastic member, the probe will not obtain a force much greater than F1 and damage the battery pole. Instead, the first elastic member only requires this part of the probe to increase a smaller force, and the first elastic member will produce obvious compression deformation. Therefore, relative to the part of the probe that is still moving downward to puncture the oxide layer of the pole, this part of the probe has a tendency to move upward relatively. The first elastic member plays a further buffering role, thereby avoiding the situation where the surface of the pole is crushed by excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0028] Figure 1 This is a schematic structural diagram of an implementation of a probe assembly provided in Example 1 of the utility model;
[0029] Figure 2 This is a structural schematic diagram of an implementation of the chemical fractionation and storage device provided in Example 2 of the utility model;
[0030] Figure 3 for Figure 2 Schematic diagram of the side structure.
[0031] Description of reference numerals:
[0032] 1. Probe seat; 2. First elastic part; 3. Battery cell to be tested; 4. Probe; 5. Second elastic part; 6. Limiting part; 7. Guide column; 8. Connecting seat; 9. Guide cavity; 10. Needle rod; 11. Mounting plate; 12. Driving part. DETAILED DESCRIPTION
[0033] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0036] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0037] Example 1
[0038] The probe assembly provided in this embodiment is used in a chemical separation device, and the cooperation of the first elastic member 2 and the second elastic member 5 prevents the probe 4 from damaging the pole surface due to overpressure. The force required for the probe 4 to pierce the pole oxide layer of the battery cell 3 to be tested is F1, and the force required to pierce the pole surface is F2. Generally, the value of F2 is much greater than the value of F1. The setting of the first elastic member 2 in this embodiment makes the force on the probe 4 far less than F2, thereby protecting the pole surface.
[0039] like Figure 1As shown, a specific implementation of the probe assembly provided in this embodiment includes a probe seat 1 and at least one probe 4, a first elastic member 2 is arranged on the probe seat 1, and the first elastic member 2 has an elastic force that makes the probe seat 1 close to the battery cell 3 to be tested; the probe 4 is arranged on the probe seat 1 through a second elastic member 5, and the second elastic member 5 has an elastic force that makes the probe 4 close to the battery cell 3 to be tested, and the elastic coefficient of the first elastic member 2 is smaller than the elastic coefficient of the second elastic member 5.
[0040] The first elastic member 2 and the second elastic member 5 not only play a buffering role, but also prevent the probe 4 from being over-pressed and damaging the pole surface through the coordinated use of the first elastic member 2 and the second elastic member 5. The specific analysis is as follows: during the downward movement of the probe assembly under external force, the probe 4 first contacts the pole of the battery cell to be tested 3. Since the elastic coefficient of the first elastic member 2 is smaller than the elastic coefficient of the second elastic member 5, the first elastic member 2 is more easily compressed. Therefore, under stress, the first elastic member 2 bears a larger deformation amount, and the second elastic member 5 bears a smaller deformation amount. When the probe 4 reaches the force F1 required to pierce the pole oxide layer of the battery cell to be tested, the pole oxide layer is Puncture; if at this time a part of the probe assembly has not been punctured, the probe assembly continues to be pressed down, and when the punctured part of the probe 4 contacts the surface of the pole, due to the presence of the first elastic member 2, the probe 4 will not obtain a force much greater than F1 and damage the battery pole, but the first elastic member 2 makes the part of the probe 4 only need to increase a smaller force, and the first elastic member 2 will produce obvious compression deformation, and then relative to the part of the probe 4 that is still moving downward to puncture the oxide layer of the pole, the part of the probe 4 has a tendency to move upward relatively, and the first elastic member 2 plays a further buffering role, thereby avoiding the situation where the surface of the pole is crushed by excessive pressure.
[0041] Specifically, the elastic coefficient of the first elastic member 2 is much smaller than the elastic coefficient of the second elastic member 5 , and the first elastic member 2 and the second elastic member 5 have a very obvious deformation difference, and the deformation degree of the first elastic member 2 is much greater than that of the second elastic member 5 .
[0042] Specifically, the structure of the probe seat 1 is not limited and may be a rectangular, trapezoidal or irregular structure. If there is one probe 4, the probe 4 is arranged in the middle of the probe seat 1. If there are multiple probes 4, the multiple probes 4 are evenly distributed below the probe seat 1 to facilitate uniform force application to the probe 4.
[0043] like Figure 1As shown, the probe assembly provided in this embodiment further includes a limiter 6, which limits the probe seat 1 in the initial state; when the probe seat 1 is in the initial state, the first elastic member 2 is in a compressed state, and the probe seat 1 is pressed against the limiter 6 by the pre-compression force of the first elastic member 2. It should be noted that the first elastic member 2 is in a compressed state, which means that the first elastic member 2 is in a force storage state, and the setting of the limiter 6 makes the probe seat 1 only move upward relative to the limiter 6.
[0044] In the initial state, the first elastic member 2 is pre-compressed, making the first elastic member 2 more stable and reliable during use, reducing deformation and relaxation of the first elastic member 2 during use, so that during the downward pressing process of the probe assembly, the first elastic member 2 is compressed in advance, reducing the overall compression of the first elastic member 2 and the second elastic member 5 in the probe assembly, improving compression efficiency and making the compression more stable.
[0045] A specific implementation of a limit member 6, the limit member 6 can be a limit plate arranged below the probe seat 1, and after the limit plate overcomes the elastic force of the first elastic member 2, the first elastic member 2 is compressed and arranged above the probe seat 1. There is no limitation on the fixing method of the limit plate, and it can be fixed on the mounting plate 11 of the chemical separation and containment device. The mounting plate 11 is described in Example 2, and it can also be fixed on other components of the chemical separation and containment device, as long as the limit plate and the mounting plate 11 are kept moving synchronously.
[0046] In addition, as an alternative implementation, the limiting member 6 may also be limited in other ways, which will be explained in the subsequent description of the guide column 7.
[0047] The probe assembly provided in this embodiment has a pre-compression force of: the force F1 required for the probe 4 to pierce the pole oxide layer of the battery cell 3 to be tested. The pre-compression force of the first elastic member 2 is F1, that is, the first elastic member 2 will continue to be compressed only when it receives a force greater than F1. During the overall downward pressing process of the probe assembly, when the probe 4 contacts the battery cell 3 to be tested, the force on the probe 4 increases from zero. Since the elastic coefficient of the second elastic member 5 is large, during the process of the probe 4 being subjected to force, the second elastic member 5 is compressed a small distance so that the probe 4 reaches the force F1 used to penetrate the pole oxide layer. In this process, since F1 is not reached, the first elastic member 2 is in a fixed state. This setting greatly reduces the amount of compression required for the probe assembly to complete the penetration. Only the second elastic member 5 is compressed, making the penetration process controllable and stable.
[0048] In addition, as an alternative implementation, the magnitude of the pre-compression force may also be smaller than the F1 value.
[0049] like Figure 1As shown, the probe assembly provided in this embodiment also includes a guide column 7, and the probe seat 1 is slidably set on the guide column 7. The setting of the guide column 7 improves the sliding stability of the probe seat 1, avoids the first elastic member 2 from being skewed after being subjected to force and affecting the moving direction of the probe 4, and also ensures the accuracy of piercing the battery cell 3 to be tested.
[0050] Specifically, the first elastic member 2 is sleeved on the guide column 7, and the number of guide columns 7 is set according to the number of first elastic members 2. In addition, as an alternative embodiment, the first elastic member 2 may not be sleeved on the guide column 7, and the axis of the first elastic member 2 is parallel to the axis of the guide column 7.
[0051] Specifically, there are multiple guide pillars 7 to prevent the probe seat 1 from rotating during the pressing process, which would cause unstable pressing.
[0052] like Figure 1 As shown, the probe assembly provided in this embodiment further includes a connection seat 8, the guide column 7 is arranged on the connection seat 8, one end of the first elastic member 2 abuts against the connection seat 8 and the other end abuts against the probe seat 1. The connection seat 8 is provided as a reference for the entire probe assembly, and the upper end of the guide column 7 and the connection seat 8 can be welded or threaded.
[0053] The description of the replaceable implementation of the limiting member 6 is that the limiting member 6 is a limiting nut, which is threadedly connected to the lower end of the guide column 7 , and the limiting nut limits the probe seat 1 .
[0054] In addition, as an alternative implementation, the connecting seat 8 may not be provided, and the guide column 7 may be directly fixed on the mounting plate 11 mentioned in the second embodiment.
[0055] like Figure 1 As shown, in the probe assembly provided in this embodiment, the probe seat 1 has a guide cavity 9, the needle rod 10 of the probe 4 is slidably disposed in the guide cavity 9, and the second elastic member 5 is sleeved on the needle rod 10. The cooperation between the guide cavity 9 and the needle rod 10 ensures the sliding stability of the probe 4, and during the movement of the probe 4, at least a part of the probe 4 is always located inside the guide cavity 9.
[0056] Specifically, the second elastic member 5 may be disposed inside the guide cavity 9 , or may be disposed at the lower portion of the probe seat 1 .
[0057] In the probe assembly provided in this embodiment, the first elastic member 2 and the second elastic member 5 are both compression springs. The compression springs buffer the movement of the probe 4 of the probe seat 1, reduce impact force and vibration, and improve the working stability of the probe 4.
[0058] In the probe assembly provided in this embodiment, there are at least two first elastic members 2, and there are at least two second elastic members 5 corresponding to each probe 4. The provision of multiple elastic members further improves the buffering capacity.
[0059] Specifically, the plurality of first elastic members 2 are evenly distributed, and the plurality of second elastic members 5 are evenly distributed, so that the force is evenly applied.
[0060] Example 2
[0061] like Figure 2 and Figure 3 As shown, a specific implementation of the chemical fractionation device provided in this embodiment includes a mounting plate 11 and several probe assemblies described in Example 1. The probe assemblies are arranged on the mounting plate 11. By adopting the probe assemblies in Example 1, the overvoltage and undervoltage problems caused by inconsistent heights of several probe assemblies are solved.
[0062] Specifically, the mounting plate 11 is an aluminum plate; a plurality of probe assemblies are evenly and spaced apart and arranged on the mounting plate 11 .
[0063] Figure 2 and Figure 3 In order to avoid providing the connection seat 8 , the guide column 7 is directly provided on the mounting plate 11 .
[0064] like Figure 2 and Figure 3 As shown, the chemical separation and capacity device provided in this embodiment also includes a driving member 12, and the output end of the driving member 12 is connected to the middle part of the mounting plate 11. By connecting to the middle part of the mounting plate 11, force can be uniformly applied to several probe assemblies at the same time.
[0065] Specifically, the driving member 12 is a cylinder arranged vertically downward, and may also be an electric cylinder or the like.
[0066] Working process of chemical fractionation device:
[0067] The driving member 12 drives the mounting plate 11 to drive a plurality of probe assemblies to move downward synchronously, assuming that a portion of the probe assembly A is lower than another portion of the probe assembly B;
[0068] The probe 4 in the probe assembly A first contacts the battery cell 3 to be tested. Since the pre-compression force of the first elastic member 2 is F1, and the elastic coefficient of the first elastic member 2 is smaller than the elastic coefficient of the second elastic member 5, during the pressing process, the second elastic member 5 is compressed by a small distance, so that the probe 4 reaches the force F1 used to penetrate the oxide layer of the pole, and then the probe 4 in the probe assembly A penetrates the oxide layer of the pole;
[0069] At this time, the probe 4 in the probe assembly B has not yet penetrated the oxide layer of the pole;
[0070] Then, the driving member 12 drives the mounting plate 11 to continue to press down, and the probe assembly A and the probe assembly B are analyzed respectively. For the probe 4 in the probe assembly B, its working process is the same as the penetration process of the probe 4 of the above-mentioned probe assembly A; for the probe 4 of the probe assembly A, it continues to press down and contacts the surface of the pole. Due to the existence of the first elastic member 2, the probe 4 will not obtain a force much greater than F1 and damage the battery cell pole. Instead, the first elastic member 2 makes the probe 4 only need to increase a smaller force, and the first elastic member 2 will produce obvious compression deformation, and then relative to the probe 4 in the probe assembly B moving downward, this part of the probe 4 has a tendency to move upward relatively, thereby avoiding the situation where the pole surface is crushed by excessive pressure.
[0071] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present utility model.
Claims
1. A probe assembly, characterized in that: include: A probe seat (1) having a first elastic member (2) disposed thereon, wherein the first elastic member (2) has an elastic force that enables the probe seat (1) to be close to the battery cell (3) to be tested; At least one probe (4) is arranged on the probe seat (1) via a second elastic member (5), the second elastic member (5) having an elastic force that causes the probe (4) to approach the battery cell (3) to be tested, and the elastic coefficient of the first elastic member (2) is smaller than the elastic coefficient of the second elastic member (5).
2. The probe assembly according to claim 1, characterized in that: Also includes: A limiting member (6) for limiting the position of the probe seat (1) in an initial state; When the probe seat (1) is in an initial state, the first elastic member (2) is in a compressed state, and the probe seat (1) is pressed against the limiting member (6) by the pre-compression force of the first elastic member (2).
3. The probe assembly according to claim 2, characterized in that: The magnitude of the pre-compression force is set to be the force required for the probe (4) to pierce the electrode oxide layer of the battery cell (3) to be tested.
4. The probe assembly according to claim 1, characterized in that: Also includes: A guide column (7), the probe seat (1) being slidably arranged on the guide column (7).
5. The probe assembly according to claim 4, characterized in that: Also includes: A connecting seat (8), the guide column (7) is arranged on the connecting seat (8), one end of the first elastic member (2) abuts against the connecting seat (8) and the other end abuts against the probe seat (1).
6. The probe assembly according to claim 1, characterized in that: The probe seat (1) has a guide cavity (9) in it, the needle rod (10) of the probe (4) is slidably arranged in the guide cavity (9), and the second elastic member (5) is sleeved on the needle rod (10).
7. The probe assembly according to any one of claims 1 to 6, characterized in that: The first elastic member (2) and the second elastic member (5) are both compression springs.
8. The probe assembly according to any one of claims 1 to 6, characterized in that: There are at least two first elastic members (2), and there are at least two second elastic members (5) corresponding to each probe (4).
9. A chemical fractionation device, characterized in that: include: Mounting plate (11); The probe assembly according to any one of claims 1 to 8 is arranged on the mounting plate (11).
10. The chemical fractionation and volume separation device according to claim 9, characterized in that: Also includes: A driving member (12) has an output end connected to the middle of the mounting plate (11).