Temperature sensing line sealing device for lithium battery oil bath test

Abstract

The temperature sensing line sealing device for the lithium battery oil bath test comprises a threaded piece and a plurality of temperature sensing lines, the threaded piece is provided with a stud and a nut connected with the stud, the end, away from the stud, of the nut is provided with a containing cavity, and the end, away from the nut, of the stud is provided with a plurality of first installation holes communicated with the containing cavity. The temperature sensing line penetrates through the first mounting hole and the containing cavity, the two ends of the temperature sensing line extend out of the two sides of the threaded part respectively, the containing cavity is filled with sealing colloid, the stud is used for being in threaded connection with a threading hole in a jig box panel, and the nut is fixedly connected with the outer side wall of the jig box panel. The containing cavity is filled with the sealing colloid, efficient sealing is achieved at the contact position of the temperature sensing line and the threaded piece, the threaded piece is in threaded connection with the threading hole of the jig box panel, it is ensured that the whole sealing device is stably installed on the jig box, the position of the sealing colloid in the containing cavity is limited, and the sealing effect is good. And the problem of sealing failure of the temperature sensing line under the condition of swinging or high-frequency use is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery testing, in particular to a temperature sensor wire sealing device for lithium battery oil bath testing. Background Art

[0002] As is well known, lithium-ion batteries will generate temperature rise during the charge and discharge process. Especially in extreme abuse environments, there is a high possibility of thermal runaway problems, and certain means are necessarily required to cool down, so as to ensure the normal use of lithium-ion batteries and prevent thermal runaway from endangering people's lives.

[0003] At present, the means to reduce the temperature of battery cells at home and abroad include air cooling, liquid cooling, and phase change cooling methods. The air cooling structure is simple, but the heat dissipation efficiency is low. The phase change cooling structure is complex and difficult to maintain later. While liquid cooling mainly uses fuel oil for cooling. The cooling oil has a high thermal conductivity, large heat capacity, and high heat dissipation coefficient, and is simple to maintain, which can effectively reduce the battery temperature and prevent battery failure. However, generally, during the oil bath circulation test in an electrical performance laboratory, only the temperature sensor wire through-hole of the fixture box is simply sealed. After the temperature sensor wire is used frequently, the sealant at the sealed hole will peel off and crack from the temperature sensor wire, resulting in the cooling oil seeping out from the fixture box through the wire through-hole, polluting the ground and even flowing to the charge and discharge cabinet to cause equipment short circuit. Summary of the Utility Model

[0004] In view of this, the utility model provides a temperature sensor wire sealing device for lithium battery oil bath testing to solve the problem that the high-frequency swing of the temperature sensor wire causes the sealant to fatigue and crack, and further leads to the sealing failure of the temperature sensor wire and the wire through-hole of the fixture box.

[0005] The technical solution of the utility model is realized as follows:

[0006] The utility model provides a temperature sensor wire sealing device for lithium battery oil bath testing, which includes a threaded part and a plurality of temperature sensor wires. The threaded part has a stud and a nut connected to the stud. One end of the nut away from the stud is provided with a receiving cavity, and the receiving cavity extends towards the end of the stud away from the nut. A plurality of first mounting holes communicating with the receiving cavity are opened at the end of the stud away from the nut. The temperature sensor wires pass through the first mounting holes and the receiving cavity, and both ends of the temperature sensor wires extend out from both sides of the threaded part. The receiving cavity is filled with a sealing colloid. The stud is used for threaded connection with the wire through-hole on the panel of the fixture box, and the nut is fixedly connected to the outer side wall of the panel of the fixture box.

[0007] On the basis of the above technical solution, preferably, an annular groove is opened on the surface of the end of the nut facing the stud, and a sealing ring is fixedly arranged in the annular groove. The sealing ring is used for sealing connection between the nut and the outer side wall of the panel of the fixture box.

[0008] On the basis of the above technical solution, preferably, it further includes a cover. A second mounting hole corresponding to the position of the first mounting hole is provided on the cover. The second mounting hole is used for the temperature sensing wire to pass through, and the cover is fixedly arranged at the opening end of the accommodating cavity.

[0009] Furthermore, preferably, an installation groove coaxial with the accommodating cavity is provided on the outer end surface of the nut, and the cover is fixedly arranged in the installation groove.

[0010] On the basis of the above technical solution, preferably, a plurality of the first mounting holes are evenly arranged around the central axis of the stud.

[0011] Preferably, the first mounting hole, the second mounting hole and the temperature sensing wire are in clearance fit.

[0012] Preferably, the cover and the installation groove are fixedly connected by an interference fit or a screw method.

[0013] Preferably, the cover is made of plastic material.

[0014] Preferably, the threaded part is made of metal material or plastic material.

[0015] Preferably, the outer contour of the nut is a hexagonal structure.

[0016] The utility model has the following beneficial effects compared with the prior art:

[0017] (1) By filling the sealing colloid in the accommodating cavity, efficient sealing is achieved at the contact part between the temperature sensing wire and the threaded part. The stud on the threaded part is threadedly connected with the wire passing hole, and the nut is fixedly connected with the outer side wall of the jig box panel, ensuring that the whole sealing device is firmly installed on the jig box. In addition, the sealing colloid is position-limited in the accommodating cavity, preventing the problem of sealing failure of the temperature sensing wire under swinging or high-frequency use.

[0018] (2) Through the setting of the sealing colloid, the sealing between the threaded part and the temperature sensing wire is realized. Through the setting of the sealing ring, the sealing between the threaded part and the wire passing hole is realized. The double sealing mechanism greatly reduces the oil leakage problem at the connection between the temperature sensing wire and the wire passing hole, and improves the sealing effect between the temperature sensing wire and the wire passing hole on the jig box panel.

[0019] (3) The introduction of the cover provides double protection in the actual structure. The temperature sensing wire not only passes through the first mounting hole and the sealing colloid in the accommodating cavity, but also needs to pass through the second mounting hole on the cover. This structural setting increases the fixing points of the temperature sensing wire, further reducing the stress on the sealing colloid during high-frequency swinging of the wire body, avoiding or reducing peeling or cracking at the connection between the temperature sensing wire and the sealing colloid. At the same time, the setting of the cover protects the sealing colloid, preventing the sealing colloid from contacting the external environment for a long time and causing fatigue or aging. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a temperature-sensing wire sealing device for lithium battery oil bath testing disclosed by the present invention;

[0022] Figure 2 It is a first-perspective exploded schematic diagram of a temperature-sensing wire sealing device for lithium battery oil bath testing disclosed by the present invention;

[0023] Figure 3 It is a second-perspective exploded schematic diagram of a temperature-sensing wire sealing device for lithium battery oil bath testing disclosed by the present invention;

[0024] Figure 4 It is a planar structural schematic diagram of a temperature-sensing wire sealing device for lithium battery oil bath testing disclosed by the present invention;

[0025] Figure 5 For Figure 4 the cross-sectional view taken along the plane A-A in

[0026] Reference numerals:

[0027] 1. Threaded part; 2. Temperature-sensing wire; 11. Stud; 12. Nut; 10. Accommodating cavity; 110. First mounting hole; 3. Sealing colloid; 4. Fixture box panel; 41. Wire passing hole; 121. Annular groove; 5. Sealing ring; 6. Sealing cover; 61. Second mounting hole; 122. Mounting groove. Detailed implementation manners

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] As Figure 1 shown, in combination with Figures 2-5 , the embodiments of the present invention disclose a temperature-sensing wire sealing device for lithium battery oil bath testing, including a threaded part 1 and a plurality of temperature-sensing wires 2.

[0030] Among them, the threaded part 1 has a stud 11 and a nut 12 connected to the stud 11. An accommodation cavity 10 is provided at one end of the nut 12 away from the stud 11. The accommodation cavity 10 extends towards the end of the stud 11 away from the nut 12. A number of first mounting holes 110 communicating with the accommodation cavity 10 are provided at the end of the stud 11 away from the nut 12. The temperature-sensitive wire 2 passes through the first mounting holes 110 and the accommodation cavity 10. Both ends of the temperature-sensitive wire 2 extend out from both sides of the threaded part 1. The accommodation cavity 10 is filled with a sealing colloid 3. The stud 11 is used for threaded connection with a wire-passing hole 41 on the jig box panel 4, and the nut 12 is fixedly connected to the outer side wall of the jig box panel 4.

[0031] With the above technical solution, when the temperature-sensitive wire 2 needs to pass through the wire-passing hole 41 on the jig box panel 4 and the connection part is sealed, each temperature-sensitive wire 2 can be first passed through the first mounting holes 110 and the accommodation cavity 10 correspondingly, so that the temperature-sensitive wire 2 passes through the entire threaded part 1, and the accommodation cavity 10 is filled with the sealing colloid 3, so that the temperature-sensitive wire 2 and the threaded part 1 are efficiently sealed through the sealing colloid 3. After the temperature-sensitive wire 2 and the threaded part 1 are assembled, one end of the temperature-sensitive wire 2 is passed through the wire-passing hole 41 on the jig box panel 4. The stud 11 on the threaded part 1 is threadedly connected with the wire-passing hole 41, and the nut 12 is fixedly connected to the outer side wall of the jig box panel 4, ensuring that the entire sealing device is firmly installed on the jig box. In addition, the sealing colloid 3 is position-limited in the accommodation cavity 10, preventing the problem of sealing failure of the temperature-sensitive wire 2 under the condition of swinging or high-frequency use, and having good sealing effect, durability and simple maintenance characteristics.

[0032] It should be noted that the structural design of the stud 11 and the nut 12 of the threaded part 1 is stable. Especially after the sealing colloid 3 is filled, it can effectively cope with the high-frequency swinging of the temperature-sensitive wire 2 and reduce the problem of fatigue cracking of the sealing glue. Compared with the traditional simple sealing method, this design can significantly extend the service life of the sealing device. In addition, due to the threaded connection design of the sealing device, the threaded part 1 and the jig box can be conveniently disassembled and installed, simplifying the process of daily maintenance and replacement.

[0033] Since the threaded part 1 is threadedly connected with the wire-passing hole 41, in order to avoid the occurrence of cooling oil leakage between the threaded part 1 and the wire-passing hole 41, in this embodiment, an annular groove 121 is further provided on the surface of the nut 12 facing the stud 11, and a sealing ring 5 is fixedly arranged in the annular groove 121. The sealing ring 5 is used for sealing connection between the nut 12 and the outer side wall of the jig box panel 4.

[0034] With the above technical solution, through the arrangement of the sealing colloid 3, the sealing between the threaded part 1 and the temperature-sensitive wire 2 is achieved. Through the arrangement of the sealing ring 5, the sealing between the threaded part 1 and the wire passing hole 41 is achieved. The double-sealing mechanism greatly reduces the oil leakage problem at the connection between the temperature-sensitive wire 2 and the wire passing hole 41, and improves the sealing effect between the temperature-sensitive wire 2 and the wire passing hole 41 on the fixture box panel 4.

[0035] In this embodiment, after the sealing colloid 3 is filled into the accommodation cavity 10, the sealing at the connection between the temperature-sensitive wire 2 and the threaded part 1 can be achieved after the sealing colloid 3 is cured. However, the sealing colloid 3 is at the open end of the accommodation cavity 10, and long-term use will cause the sealing colloid 3 to fatigue or age, resulting in the separation and cracking at the connection between the sealing colloid 3 and the temperature-sensitive wire 2.

[0036] Therefore, the sealing device of this embodiment is also provided with a cover 6. A second mounting hole 61 corresponding to the position of the first mounting hole 110 is provided on the cover 6. The second mounting hole 61 is used for the temperature-sensitive wire 2 to pass through, and the cover 6 is fixedly arranged at the open end of the accommodation cavity 10.

[0037] With the above technical solution, the introduction of the cover 6 provides double protection in the actual structure. The temperature-sensitive wire 2 not only passes through the first mounting hole 110 and the sealing colloid 3 in the accommodation cavity 10, but also needs to pass through the second mounting hole 61 on the cover 6. This structural setting increases the fixing points of the temperature-sensitive wire 2, further reduces the stress on the sealing colloid 3 when the wire body swings at high frequency, avoids or reduces the separation or cracking at the connection between the temperature-sensitive wire 2 and the sealing colloid 3. At the same time, the setting of the cover 6 protects the sealing colloid 3 and prevents the sealing colloid 3 from contacting the external environment for a long time, resulting in fatigue or aging.

[0038] As some preferred embodiments, an installation groove 122 coaxial with the accommodation cavity 10 is provided on the outer end surface of the nut 12, and the cover 6 is fixedly arranged in the installation groove 122. Through the setting of the installation groove 122, it is convenient for the cover 6 to be embedded into the installation groove 122, and the cover 6 is fixed in the installation groove 122 to protect the sealing colloid 3 in the accommodation cavity 10.

[0039] Preferably, a plurality of the first mounting holes 110 are evenly arranged around the central axis of the stud 11, ensuring that the temperature-sensitive wires 2 can be evenly distributed in the accommodation cavity 10, so that after the sealing colloid 3 is filled in the accommodation cavity 10, it can contact the temperature-sensitive wires 2 evenly, and avoid the problem of local stress concentration between the temperature-sensitive wires 2 and the sealing colloid 3 caused by uneven arrangement of the temperature-sensitive wires 2.

[0040] Preferably, the first mounting hole 110, the second mounting hole 61 and the temperature-sensitive wire 2 are in clearance fit. With this setting, it is convenient for the temperature-sensitive wire 2 to pass through the threaded part 1 and the cover 6 smoothly.

[0041] In the above embodiments, the cover 6 and the mounting groove 122 are fixedly connected by an interference fit or by screws.

[0042] Preferably, the cover 6 is made of plastic. With this arrangement, after the temperature sensing wire 2 passes through the cover 6, the surface breakage of the temperature sensor caused by wear at the connection between the cover 6 and the temperature sensing wire 2 can be reduced, ensuring the service life of the temperature sensing wire 2.

[0043] Preferably, the threaded member 1 is made of metal or plastic. The threaded member 1 can be selected from metal or plastic, enabling the device to adapt to different test conditions and environments. The metal material is suitable for more demanding physical conditions, while the plastic material is lighter, more economical, and suitable for general test environments. Users can flexibly select the material of the threaded member 1 according to test requirements.

[0044] Preferably, the outer contour of the nut 12 is a hexagonal structure, facilitating the rotation of the nut with a wrench to enable the threaded member 1 to be smoothly threadedly connected to the wire passing hole 41.

[0045] The working principle of the present utility model is as follows:

[0046] Each temperature sensing wire 2 is correspondingly passed through the first mounting hole 110, the accommodating cavity 10, and the second mounting hole 61, so that the temperature sensing wire 2 passes through the entire threaded member 1 and the cover 6, and a sealing colloid 3 is filled in the accommodating cavity 10. After the sealing colloid 3 is cured, the cover 6 is fixedly connected to the opening end of the accommodating cavity 10. After the temperature sensing wire 2 and the threaded member 1 are assembled, one end of the temperature sensing wire 2 is passed through the wire passing hole 41 on the panel 4 of the jig box and is threadedly connected to the wire passing hole 41 through the stud 11 on the threaded member 1, and the nut 12 is fixedly connected to the outer side wall of the panel 4 of the jig box, ensuring that the entire sealing device is firmly installed on the jig box and realizing a reliable sealing connection between the temperature sensing wire 2 and the wire passing hole 41 on the panel 4 of the jig box.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A temperature sensor wire sealing device for lithium battery oil bath testing, characterized in that: It includes a threaded part (1) and several temperature-sensitive wires (2); The threaded part (1) has a stud (11) and a nut (12) connected to the stud (11). The stud (11) is used for threaded connection with a wire-passing hole (41) on the panel (4) of the jig box, and the nut (12) is fixedly connected to the outer side wall of the panel (4) of the jig box; One end of the nut (12) away from the stud (11) is provided with a receiving cavity (10). The receiving cavity (10) extends towards the end of the stud (11) away from the nut (12). Several first mounting holes (110) communicating with the receiving cavity (10) are opened at the end of the stud (11) away from the nut (12); The temperature-sensitive wire (2) passes through the first mounting hole (110) and the receiving cavity (10), and both ends of the temperature-sensitive wire (2) extend out from both sides of the threaded part (1); The receiving cavity (10) is filled with a sealing colloid (3).

2. The temperature sensor wire sealing device for lithium battery oil bath test according to claim 1, wherein: A circular groove (121) is opened on the surface of the nut (12) towards the stud (11). A sealing ring (5) is fixedly arranged in the circular groove (121). The sealing ring (5) is used for making a sealed connection between the nut (12) and the outer side wall of the panel (4) of the jig box.

3. The temperature sensor wire sealing device for lithium battery oil bath testing according to claim 2, characterized in that: It further includes a cover (6). A second mounting hole (61) corresponding to the position of the first mounting hole (110) is opened on the cover (6). The second mounting hole (61) is used for the temperature-sensitive wire (2) to pass through. The cover (6) is fixedly arranged at the opening end of the receiving cavity (10).

4. The temperature-sensing wire sealing device for lithium battery oil bath testing according to claim 3, wherein: An installation groove (122) coaxial with the receiving cavity (10) is opened on the outer end face of the nut (12). The cover (6) is fixedly arranged in the installation groove (122).

5. The temperature-sensing wire sealing device for lithium battery oil bath testing according to claim 3, characterized in that: The several first mounting holes (110) are evenly arranged around the central axis of the stud (11).

6. The temperature-sensing wire sealing device for lithium battery oil bath testing according to claim 3, wherein: The first mounting hole (110) and the second mounting hole (61) are in clearance fit with the temperature-sensitive wire (2).

7. The temperature-sensing wire sealing device for lithium battery oil bath test according to claim 4, wherein: The cover (6) and the installation groove (122) are fixedly connected by an interference fit method or a screw method.

8. The temperature sensor wire sealing device for lithium battery oil bath test according to claim 3, characterized in that: The cover (6) is made of plastic material.

9. The temperature-sensing wire sealing device for lithium battery oil bath testing according to claim 1, characterized in that: The threaded part (1) is made of metal material or plastic material.

10. The temperature sensor wire sealing device for lithium battery oil bath test according to claim 1, characterized in that: The outer contour of the nut (12) is a hexagonal structure.

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