Double-spring temperature acquisition probe for battery detection equipment
By using a plastic inner sleeve at the rear and an insulating sleeve at the front, combined with a double-spring structure, the problems of high cost and powder contamination of temperature acquisition probes are solved, achieving more efficient and safer battery testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN TEPUSHENG SENSING TECH CO LTD
- Filing Date
- 2025-08-13
- Publication Date
- 2026-04-28
AI Technical Summary
Existing temperature acquisition probes use metal sleeves that are expensive to manufacture, have low processing efficiency, and are prone to metal powder contamination during long-term use, affecting test accuracy and safety.
The rear inner sleeve is made of plastic and the front insulating sleeve is made of insulating material. The double spring structure design avoids metal powder friction and contamination, ensuring test stability and safety.
It reduces production costs, increases the lifespan and accuracy of testing equipment, avoids metal powder contamination and short-circuit risks, and improves the accuracy of charge and discharge tests.
Smart Images
Figure CN224175967U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery testing technology, specifically to a dual-spring temperature acquisition probe for battery testing equipment. Background Technology
[0002] In battery production and testing, temperature acquisition probes are key components that ensure the safety and accuracy of battery formation, capacity testing, and performance testing. Currently, the back sleeves of mainstream temperature probes in the industry are mostly made of metal materials such as stainless steel, nickel-plated brass, or nickel-plated phosphor bronze, and they need to be machined by a single CNC machine tool.
[0003] However, the existing technology has the following drawbacks:
[0004] 1. Cost and processing efficiency issues: The cost of metal sleeve materials is relatively high, and the CNC single-process machining mode leads to low production efficiency;
[0005] 2. Metal Powder Contamination and Safety Hazards: During the long-term pressing process of the temperature probe, the friction between the metal sleeve and the spring and main rod can easily generate metal powder (such as conductive particles like copper, steel, and nickel). This powder may enter the battery cell and cause a short circuit, leading to thermal runaway, fire, or even explosion. It also contaminates the testing environment and fixtures, affecting the equipment's lifespan.
[0006] 3. Insufficient test accuracy and stability: When metal powder adheres to the electrode contact plate or probe surface, it will increase the contact resistance or cause contact instability, reducing the accuracy of key data such as charge and discharge tests and internal resistance measurements.
[0007] Therefore, finding a suitable temperature acquisition probe is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0008] Based on the aforementioned existing technologies, this application provides a temperature acquisition probe that can reduce costs, minimize metal powder contamination, and improve test stability, addressing a pressing technical problem in the field of battery testing equipment.
[0009] In one embodiment, a dual-spring temperature acquisition probe for a battery testing device is provided, including a main rod, a rear inner sleeve, an outer sleeve mounting base, a front spring, a rear spring, a front insulating sleeve, a stop shaft, and a top shell;
[0010] The rear inner sleeve is fitted onto the rear end portion of the main rod, the rear spring is fitted onto one end of the rear inner sleeve, and the outer sleeve mounting seat is fitted onto the other end of the rear inner sleeve; the rear spring is limited by the stop shaft and the outer sleeve mounting seat, and a thermal resistance module is provided inside the main rod;
[0011] The front spring is sleeved on the front end of the main rod and is limited by the front insulating sleeve and the rear inner sleeve. The top shell is used for temperature measurement.
[0012] The rear inner sleeve is made of plastic.
[0013] The top shell is made to fit against the surface of the battery under test by pressing the front and rear springs together.
[0014] In one embodiment, one end of the front spring abuts against the rear inner sleeve, and the other end of the front spring abuts against the front insulating sleeve.
[0015] In one embodiment, one end of the front insulating sleeve is fixedly connected to the top shell, and the other end of the front insulating sleeve abuts against the front spring to limit the front spring.
[0016] In one embodiment, a limiting protrusion is provided at the end of the rear-end built-in sleeve near the front-end spring;
[0017] The outer sleeve mounting base is provided with a receiving groove, which is adapted to the limiting protrusion. The rear inner sleeve moves along the central axis so that the limiting protrusion can move in the receiving groove.
[0018] In one embodiment, both the outer sleeve mounting base and the front insulating sleeve are made of insulating material.
[0019] In one embodiment, a baffle is also included, which is disposed between the outer sleeve mounting base and the rear end spring.
[0020] In one embodiment, a retaining ring assembly is further included, which is sleeved on the rear inner sleeve and disposed at one end of the rear inner sleeve near the stop shaft.
[0021] In one embodiment, the retaining ring assembly includes a washer and a retaining ring.
[0022] According to this application, the beneficial effects are as follows: it includes a main rod, a rear inner sleeve, an outer sleeve mounting base, a front spring, a rear spring, a front insulating sleeve, a stop shaft, and a top shell; the rear inner sleeve is fitted onto the rear end of the main rod, the rear spring is fitted onto one end of the rear inner sleeve, and the outer sleeve mounting base is fitted onto the other end of the rear inner sleeve; the stop shaft and the outer sleeve mounting base limit the rear spring; a thermal resistor module is provided inside the main rod; the front spring is fitted onto the front end of the main rod and is limited by the front insulating sleeve and the rear inner sleeve; the top shell is used for temperature measurement; the rear inner sleeve is made of plastic; the front and rear springs are pressed together to make the top shell fit against the surface of the battery to be tested. During the compression process of the rear spring, even with friction between the rear inner sleeve and the spring and main rod, minimal metal powder will fall off. Furthermore, the front spring, fitted onto the main rod with one end abutting against the rear inner sleeve, will also rub against the rear inner sleeve during its contraction. By using a plastic material for the rear inner sleeve, metal powder from this friction is prevented from falling into the battery cell and causing a short circuit. This also prevents contamination, protecting the test fixtures, connectors, test chamber, and surrounding environment from falling metal powder, thus extending the equipment's lifespan. Additionally, preventing metal powder from falling onto the battery's electrode contacts, test equipment probes, or fixture contacts avoids increased or unstable contact resistance, affecting current flow and voltage testing accuracy, and consequently impacting the accuracy of key results such as charge / discharge tests and internal resistance tests. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is one of the structural schematic diagrams of a dual-spring temperature acquisition probe used in a battery testing device in one embodiment;
[0025] Figure 2 This is a second schematic diagram of the structure of a dual-spring temperature acquisition probe used in a battery testing device in one embodiment;
[0026] Figure 3 This is a third schematic diagram of the structure of a dual-spring temperature acquisition probe used in a battery testing device in one embodiment;
[0027] Figure 4 This is a partial structural diagram of a dual-spring temperature acquisition probe used in a battery testing device in one embodiment.
[0028] Figure label:
[0029] 10. Main rod; 20. Rear end inner sleeve; 21. Limiting protrusion; 30. Outer sleeve mounting base; 31. Receiving groove; 41. Front end spring; 42. Rear end spring; 50. Front end insulating sleeve; 60. Stop shaft; 70. Top shell; 80. Baffle plate; 90. Snap ring assembly; 91. Snap ring; 92. Washer. Detailed Implementation
[0030] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0031] See Figures 1 to 4 As shown, in one embodiment, a dual-spring temperature acquisition probe for a battery testing device is provided, including a main rod 10, a rear inner sleeve 20, an outer sleeve mounting base 30, a front spring 41, a rear spring 42, a front insulating sleeve 50, a stop shaft 60, and a top shell 70.
[0032] The rear inner sleeve 20 is sleeved on the rear end of the main rod 10, the rear spring 42 is sleeved on one end of the rear inner sleeve 20, and the outer sleeve mounting seat 30 is sleeved on the other end of the rear inner sleeve 20; the rear spring 42 is limited by the stop shaft 60 and the outer sleeve mounting seat 30, and the main rod 10 is provided with a thermal resistance module.
[0033] The front spring 41 is sleeved on the front end of the main rod 10 and is limited by the front insulating sleeve 50 and the rear inner sleeve 20. The top shell 70 is used for temperature measurement.
[0034] The rear inner sleeve 20 is made of plastic.
[0035] The top shell 70 is made to fit against the surface of the battery under test by pressing the front spring 41 and the rear spring 42 together.
[0036] It should be noted that the main rod 10, rear inner sleeve 20, outer sleeve mounting base 30, front spring 41, rear spring 42, front insulating sleeve 50, stop shaft 60, and top shell 70 are coaxially arranged. The top shell 70 is used for temperature measurement and directly contacts the battery surface. The front insulating sleeve 50 achieves insulation by separating the metal tubes at both ends. The top shell 70 and main rod 10 are made of metal, thus isolating the top shell 70 from the main rod 10. The front spring 41 provides pressure to the top shell 70 during equipment pressing to ensure tight contact with the battery surface for accurate testing. The main rod 10 supports all components and contains a thermal resistor. The outer sleeve mounting base 30 is used for shape conversion to adapt to the equipment installation space. The rear spring 42 provides force to the top shell 70 after shape conversion to ensure tight contact with the battery surface for accurate testing. The rear inner sleeve 20 supports the outer sleeve mounting base 30 and the rear spring 42. The rear inner sleeve 20 has a through hole to house the main rod 10, which supports other components. The stop shaft 60 is fixedly connected to the main rod 10 and serves to limit the movement of the inner sleeve 20 at the rear end.
[0037] It is worth noting that during the process of the rear spring 42 being pressed down, even if the rear inner sleeve 20 rubs against the spring and the main rod 10, it will not cause a large amount of metal powder to fall off. Furthermore, the front spring 41 is sleeved on the main rod 10, and one end of the front spring 41 abuts against the rear inner sleeve. During the contraction of the front spring 41, it will also rub against the rear inner sleeve 20. By making the rear inner sleeve also made of plastic, metal powder from the friction between the front spring 41 and the rear inner sleeve 20 can be prevented from falling off, thus preventing it from entering the battery cell and causing a short circuit. This also avoids contamination problems, preventing falling metal powder from polluting the test fixture, connectors, test box, and other surrounding environments, thereby extending the equipment's lifespan. In addition to preventing metal powder from falling off, it also prevents metal powder from falling onto the battery's electrode contacts, the probes of the test equipment, or the contact points of the fixtures, avoiding increased or unstable contact resistance, which could affect the current path and voltage test accuracy, thus affecting the accuracy of key results such as charge / discharge tests and internal resistance tests.
[0038] In one embodiment, one end of the front spring 41 abuts against the rear inner sleeve 20, and the other end of the front spring 41 abuts against the front insulating sleeve 50.
[0039] It should be noted that the front spring 41 provides pressure to the top shell 70 during equipment pressing to ensure that the top shell 70 is tightly attached to the battery surface to achieve the testing effect. After being subjected to pressure, the front spring 41 acts on the front insulating sleeve 50, and the front insulating sleeve 50 acts on the top shell 70.
[0040] In one embodiment, one end of the front insulating sleeve 50 is fixedly connected to the top shell 70, and the other end of the front insulating sleeve 50 abuts against the front spring 41 to limit the front spring 41.
[0041] It should be noted that the front insulating sleeve 50 isolates the main rod 10 from the top shell 70. When the front spring 41 is under pressure, it acts on the front insulating sleeve 50, and the front insulating sleeve 50 acts on the top shell 70.
[0042] In one embodiment, a limiting protrusion 21 is provided at one end of the rear-end built-in sleeve near the front-end spring 41;
[0043] The outer sleeve mounting base 30 is provided with a receiving groove 31, which is adapted to the limiting protrusion 21. The rear inner sleeve 20 moves along the central axis so that the limiting protrusion 21 can move in the receiving groove 31.
[0044] It should be noted that when the rear inner sleeve 20 is subjected to a force in the direction of the front spring 41, the rear inner sleeve 20 moves in the direction of the front spring 41, the outer sleeve mounting seat 30 is fixed on the equipment, the rear inner sleeve 20 moves relative to the outer sleeve mounting seat 30, and the limiting protrusion 21 of the rear inner sleeve 20 moves in the receiving groove 31 of the outer sleeve mounting seat 30. On the one hand, the cooperation between the limiting protrusion 21 and the receiving groove 31 makes the rear inner sleeve 20 limited in the outer sleeve mounting seat 30. On the other hand, the cooperation between the limiting protrusion 21 and the receiving groove 31 facilitates the stable movement of the rear inner sleeve 20 in the outer sleeve mounting seat 30 without deviation.
[0045] In one embodiment, both the outer sleeve mounting base 30 and the front insulating sleeve 50 are made of insulating materials.
[0046] It should be noted that the outer sleeve mounting base 30 is made of insulating material, which facilitates installation on the equipment, and can be made of plastic material; the front insulating sleeve 50 is made of insulating material, which isolates the top shell 70 from the main rod 10, and can be made of plastic material.
[0047] In one embodiment, a baffle 80 is also included, which is disposed between the outer sleeve mounting base 30 and the rear end spring 42.
[0048] It should be noted that the outer sleeve mounting base 30 and the baffle 80 are used to change the shape to adapt to the equipment installation space.
[0049] In one embodiment, a retaining ring 91 assembly 90 is further included, the retaining ring 91 assembly 90 being sleeved on the rear inner sleeve 20, and the retaining ring 91 assembly 90 being disposed at one end of the rear inner sleeve 20 near the stop shaft 60.
[0050] It should be noted that the snap ring assembly 91 90 is snapped onto the rear inner sleeve 20. One end of the rear spring 42 abuts against the snap ring assembly 91 90, and the other end of the rear spring 42 abuts against the baffle 80. When a force is applied to the snap ring assembly 91 90 towards the outer sleeve mounting base 30, the snap ring assembly 91 90 acts on the rear inner sleeve 20, causing the rear inner sleeve 20 to move relative to the outer sleeve mounting base 30 and the main rod 10. When the snap ring assembly 91 90 is compressed by the force of the rear spring 42, the rear inner sleeve 20 moves relative to the main rod 10, and at the same time, the rear inner sleeve 20 moves relative to the rear spring 42. Even if the rear inner sleeve 20 rubs against the main rod 10 or the rear spring 42 during the movement, the rear inner sleeve 20 is made of plastic, and no excessive metal powder will fall off during the friction process, thereby reducing the possibility of short circuit, improving safety, reducing pollution, improving test stability, and extending service life.
[0051] In one embodiment, the retaining ring 91 assembly 90 includes a gasket 92 and a retaining ring 91.
[0052] It should be noted that the rear spring 42 is engaged with the retaining ring 91 to facilitate the fixation of the rear spring 42.
[0053] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.
[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.
[0055] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.
[0056] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A dual-spring temperature acquisition probe for battery testing equipment, characterized in that, Includes main rod, rear inner sleeve, outer sleeve mounting base, front spring, rear spring, front insulating sleeve, stop shaft and top shell; The rear inner sleeve is fitted onto the rear end portion of the main rod, the rear spring is fitted onto one end of the rear inner sleeve, and the outer sleeve mounting seat is fitted onto the other end of the rear inner sleeve; the rear spring is limited by the stop shaft and the outer sleeve mounting seat, and a thermal resistance module is provided inside the main rod; The front spring is sleeved on the front end of the main rod and is limited by the front insulating sleeve and the rear inner sleeve. The top shell is used for temperature measurement. The rear inner sleeve is made of plastic. The top shell is made to fit against the surface of the battery under test by pressing the front and rear springs together.
2. The dual-spring temperature acquisition probe for battery testing equipment according to claim 1, characterized in that, One end of the front spring abuts against the rear inner sleeve, and the other end of the front spring abuts against the front insulating sleeve.
3. The dual-spring temperature acquisition probe for battery testing equipment according to claim 1, characterized in that, One end of the front insulating sleeve is fixedly connected to the top shell, and the other end of the front insulating sleeve abuts against the front spring to limit the front spring.
4. The dual-spring temperature acquisition probe for battery testing equipment according to claim 1, characterized in that, The rear inner sleeve is provided with a limiting protrusion at the end near the front spring; The outer sleeve mounting base is provided with a receiving groove, which is adapted to the limiting protrusion. The rear inner sleeve moves along the central axis so that the limiting protrusion can move in the receiving groove.
5. The dual-spring temperature acquisition probe for battery testing equipment according to claim 1, characterized in that, Both the outer sleeve mounting base and the front insulating sleeve are made of insulating materials.
6. The dual-spring temperature acquisition probe for battery testing equipment according to claim 1, characterized in that, It also includes a baffle plate, which is disposed between the outer sleeve mounting base and the rear spring.
7. The dual-spring temperature acquisition probe for battery testing equipment according to claim 6, characterized in that, It also includes a retaining ring assembly, which is sleeved on the rear inner sleeve and located at one end of the rear inner sleeve near the stop shaft.
8. The dual-spring temperature acquisition probe for battery testing equipment according to claim 7, characterized in that, The retaining ring assembly includes a washer and a retaining ring.