CN212658646U - Battery package acupuncture seals frock - Google Patents
Battery package acupuncture seals frock Download PDFInfo
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- CN212658646U CN212658646U CN202021146870.7U CN202021146870U CN212658646U CN 212658646 U CN212658646 U CN 212658646U CN 202021146870 U CN202021146870 U CN 202021146870U CN 212658646 U CN212658646 U CN 212658646U
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- main sleeve
- needle
- battery pack
- sealing tool
- seal
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Abstract
The utility model provides a battery package acupuncture seals frock. The sealed frock of battery package acupuncture is suitable for and fixes on the box of battery package, the sealed frock of battery package acupuncture includes: a main sleeve adapted to extend through a wall of the tank and sealingly secured to the wall, the main sleeve defining a needle channel extending in a needle direction through which a test needle passes; a seal positioned within the main sleeve and adapted to seal a gap between the test needle and an inner circumferential surface of the main sleeve when the test needle penetrates into the case through the needle penetration passage. According to the utility model discloses a sealed frock of battery package acupuncture simple structure easily makes and assembles, and application scope is wide to can realize good sealed effect.
Description
Technical Field
The utility model relates to a battery package safety test frock specifically relates to battery package acupuncture seals frock.
Background
In the thermal diffusion test of the battery pack, thermal runaway of the monomer cells can be usually initiated by externally heating the monomer cells, needling the monomer cells, or by providing internal defects in the monomer cells.
At present, in a battery pack thermal diffusion test for inducing thermal runaway of a single cell through needling, a through hole H (refer to fig. 1) is generally directly formed in a wall W of a battery pack. In the test process, the through hole H is used as a movement channel of the test needle, and the test needle penetrates through the through hole H to penetrate into the monomer battery core. Because the box of the battery pack is usually formed by aluminum extrusion tailor-welding, after the single electric core in the box of the battery pack is out of control due to heat, the box wall W (especially the area of the through hole H) of the battery pack is easy to deform under high temperature and high pressure, so that the self-sealing failure is caused. Particularly for a battery pack of a high nickel chemical system (NCM8622/NCM811), no tool is available at present to effectively seal a needle-punched area on a battery pack box body, and flame or gas can be sprayed out from the needle-punched area of the box body in a test process, so that an expected test effect cannot be obtained.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that exists among the above-mentioned prior art just, provide a battery package acupuncture sealing frock that has good sealed effect.
The utility model provides a battery package acupuncture seals frock. The sealed frock of battery package acupuncture is suitable for and fixes on the box of battery package, the sealed frock of battery package acupuncture includes: a main sleeve adapted to extend through a wall of the tank and sealingly secured to the wall, the main sleeve defining a needle channel extending in a needle direction through which a test needle passes; a seal positioned within the main sleeve and adapted to seal a gap between the test needle and an inner circumferential surface of the main sleeve when the test needle penetrates into the case through the needle penetration passage.
According to the utility model discloses a battery package acupuncture seals frock can seal the acupuncture region of box effectively to flame or the gaseous regional blowout of acupuncture that produces from the monomer electric core thermal runaway of avoiding the battery package can't obtain the anticipated test effect.
In accordance with the above-described concepts, the present invention may further include any one or more of the following alternatives.
In some alternatives, the main sleeve includes a limit step provided on an inner peripheral side thereof, and the seal member is positioned on the limit step. The setting of spacing step can avoid the test needle motion in-process sealing member to take place to warp or remove to guarantee good sealed effect.
In some optional forms, the battery pack needling sealing tool further comprises an adjusting member, wherein the adjusting member is movably arranged in the main sleeve and presses against the sealing member to adjust the sealing compression rate of the sealing member, so that the optimal sealing effect is achieved.
In some alternatives, the adjustment member is spaced from the retention step in the needling direction, and the seal is positioned between the retention step and the adjustment member, wherein the adjustment member is cylindrical and has an external thread, the main sleeve has a mating internal thread, and the adjustment member is threaded to the main sleeve.
In some optional forms, the outer peripheral surface of the adjusting member is coated with a high-temperature-resistant sealant so as to ensure the sealing connection with the main sleeve and further enhance the sealing effect.
In some optional forms, the battery pack needling sealing tool comprises a plurality of sealing elements, corresponding limiting steps and adjusting members, wherein the sealing elements are arranged at intervals along the needling direction so as to achieve multiple sealing effects.
In some alternatives, the surface of the main sleeve is insulated to avoid damage to the tooling from arcing during testing.
In some alternatives, the seal is made of high temperature resistant fluororubber to avoid deformation of the seal under the influence of high temperatures.
In some alternatives, the battery pack needle sealing tool further comprises a guide sleeve for guiding the test needle, the guide sleeve being sleeved at an end of the main sleeve adapted to be positioned outside the case.
In some alternatives, the primary sleeve is adapted to be welded to the tank wall.
In some alternatives, the battery pack needle sealing tool further comprises: the first connecting piece is fixed on the outer peripheral side of the main sleeve; the second connecting piece is movably sleeved on the outer peripheral side of the main sleeve; wherein the first and second connectors are adapted to be positioned on respective inner and outer sides of the tank wall and clamp the tank wall therebetween to secure the primary sleeve to the tank wall.
In some alternatives, the first connector is a shoulder projecting outwardly from the main sleeve in a transverse direction of the main sleeve, the second connector is cylindrical and has an internal thread, the main sleeve has a mating external thread, and the second connector is threaded to the main sleeve.
In some alternatives, the first connecting member is a first flange protruding outward from the main sleeve in a transverse direction of the main sleeve, the second connecting member is a second flange, and the first flange and the second flange are connected by bolts.
In some alternatives, the first connector is integrally formed with the main sleeve.
In some alternatives, the battery pack needle sealing tool further comprises a sealing member adapted to be disposed between the first connector and the tank wall to ensure that the primary sleeve is sealingly secured to the tank wall.
According to the utility model discloses a sealed frock of battery package acupuncture can realize better sealed effect, and electric arc is to the damage of frock when can also avoiding the acupuncture. Furthermore, according to the utility model discloses a sealed frock of battery package acupuncture simple structure easily makes and assembles, can fix to the battery package through multiple mode and need not to carry out great change to battery package itself to applicable in various types of battery package.
Drawings
Other features and advantages of the present invention will be better understood from the following detailed description of alternative embodiments, taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts, and in which:
FIG. 1 is a partial schematic view of a wall of a prior art battery pack showing a through hole in the wall for passage of a test needle;
fig. 2 is a schematic cross-sectional view of a battery pack needle sealing tool according to a first embodiment of the present invention, when fixed to a case of a battery pack;
FIG. 3 is a schematic cross-sectional view of the battery pack needle sealing tool of FIG. 2;
FIG. 4 is a schematic enlarged view of region A in FIG. 3;
FIG. 5 is a schematic enlarged view of region B in FIG. 3;
fig. 6 is a schematic cross-sectional view of a battery pack needle sealing tool according to a second embodiment of the present invention, when secured to a case of a battery pack; and
fig. 7 is a schematic cross-sectional view of a battery pack needle-punching sealing tool according to a third embodiment of the present invention, when the tool is fixed to a box body of a battery pack.
Detailed Description
The practice and use of the embodiments are discussed in detail below. It should be understood, however, that the specific embodiments discussed are merely illustrative of specific ways to make and use the invention, and do not limit the scope of the invention. The description herein of the structural positions of the respective components, such as the directions of upper, lower, top, bottom, etc., is not absolute, but relative. When the respective components are arranged as shown in the drawings, these direction expressions are appropriate, but when the positions of the respective components in the drawings are changed, these direction expressions are changed accordingly. In this context, the longitudinal direction of a component refers to its length direction and the transverse direction of a component refers to its width direction.
Fig. 2 to 5 show a battery pack needle-punching sealing tool 100 according to a first embodiment of the present invention.
As shown in fig. 2 to 5, the battery pack needle sealing tool 100 may be fixed to the case 10 of the battery pack. The battery package acupuncture seals frock 100 mainly includes: a main sleeve 102, a first seal 104, a first adjustment member 106, a second seal 108, a second adjustment member 110, and a guide sleeve 112.
The main sleeve 102 may extend through the wall 12 of the tank 10 and be sealingly secured to the wall 12. In the first embodiment, the main sleeve 102 may be sealingly fixed to the tank wall 12 by welding, and the main sleeve 102 may be made of aluminum so as to be welded to the tank wall 12 made of aluminum. The main sleeve 102 may have a cylindrical shape, such as a cylindrical shape, a square cylindrical shape, an elliptical cylindrical shape, or the like. The main sleeve 102 has a first end 114 and a second end 116; when the main sleeve 102 is secured to the tank wall 12, a first end 114 of the main sleeve 102 is located inside the tank 10 and a second end 116 of the main sleeve 102 is located outside the tank 10. The main sleeve 102 defines a lancing channel 119 extending in a lancing direction for a test needle 118 to pass through. The test needles 118 are usually made of tungsten steel, and remain in place after the individual cells are needled until the end of the test. In the illustrated embodiment, the needling direction is along the longitudinal direction D of the primary sleeve 102LPointing in the direction of the interior of the housing 10. The surface of the main sleeve 102 can be subjected to insulation treatment in modes of electrophoresis/electroplating and the like, so that the damage of electric arcs to the battery pack needling sealing tool 100 in the needling process is effectively prevented.
The main sleeve 102 may have a first stop step 120 and a second stop step 122. A first limit step 120 and a second limit step 122 are provided on the inner peripheral side of the main sleeve 102 and along the longitudinal direction DLSpaced apart from each other. The first and second limit steps 120 and 122 may each extend annularly along the entire inner circumference of the main sleeve 102.
The first and second seals 104 and 108 are positioned within the main sleeve 102 and are configured to interferingly engage with the test needle 118 when the test needle 118 penetrates the case 10 through the needle piercing passage 119, thereby sealing a gap between the test needle 118 and the inner circumferential surface of the main sleeve 102. Specifically, first seal 104 and second seal 108 are positioned on first stop step 120 and second stop step 122, respectively, to prevent first seal 104 and second seal 108 from deforming or moving during movement of test needle 118, therebyAnd a good sealing effect is ensured. The first seal 104 and the second seal 108 are along the longitudinal direction DLSpaced apart from each other to achieve a double sealing effect.
The first and second seals 104, 108 may be in the form of O-rings and may be made of high temperature resistant viton to avoid deformation due to high temperature during testing. In the illustrated embodiment, the first seal 104 is closer to the first end 114 of the main sleeve 102, and thus the interior of the tank 10, than the second seal 108. The distance S between the first seal 104 and the end surface 124 of the first end 114 of the main sleeve 102 can be designed according to actual needs to avoid deformation of the first seal 104 closest to the interior of the tank 10 due to high temperature.
The first and second adjustment members 106 and 110 are movably disposed within the main sleeve 102 and press against the first and second seals 104 and 108, respectively, to adjust the compression ratios of the first and second seals 104 and 108 for optimal sealing.
Specifically, in the illustrated embodiment, first adjustment member 106 is longitudinally D from first limit step 120LIn a spaced arrangement, first seal 104 is positioned between first limit step 120 and first regulation member 106; the second adjusting member 110 and the second limit step 122 are along the longitudinal direction DLIn a spaced arrangement, the second seal 108 is positioned between the second limit step 122 and the second adjustment member 110. First and second adjustment members 106, 110 may be cylindrical and have external threads, and accordingly, main sleeve 102 may have internal threads that mate with the external threads of first and second adjustment members 106, 110, and first and second adjustment members 106, 110 may be threadably connected to main sleeve 102 such that first and second adjustment members 106, 110 may be positioned within main sleeve 102 in a longitudinal direction D of main sleeve 102LMove to adjust the compression ratios of the first seal 104 and the second seal 108, respectively.
The first and second regulating members 106 and 110 may be made of stainless steel, and the outer circumferential surfaces thereof (specifically, external threads) may be coated with a high temperature-resistant sealant to ensure a sealing connection with the main sleeve 102, further enhancing the sealing effect of the battery pack needle sealing tool 100.
The guide sleeve 112 may be sleeved at the second end 116 of the main sleeve 102. The guide sleeve 112 defines a guide channel 126 extending in the needling direction for the test needle 118 to pass through, ensuring that the test needle 118 moves in the needling direction during the needling process.
The battery pack needling sealing tool 100 can seal a needling area of the box body 10 when a single battery cell in the box body 10 of the battery pack is needled by using the test needle 118 to cause thermal runaway of the single battery cell, so as to prevent flame or gas generated by the thermal runaway of the single battery cell from being sprayed out of the needling area to obtain an expected test effect.
In the illustrated embodiment, the battery pack needle sealing tool 100 has two seals. It will be appreciated that only one seal and corresponding adjustment member, or more than two seals, may be provided, depending on the circumstances, such as the number of individual cells in the battery pack or the chemical system.
Fig. 6 shows a battery pack needle sealing tool 200 according to a second embodiment of the present invention. The battery pack needle sealing tool 200 according to the second embodiment is substantially the same as the battery pack needle sealing tool 100 according to the first embodiment except for the fixing manner of the main sleeve 202. The differences will be mainly described below, and the same parts will not be described again.
The battery pack needle sealing tool 200 may include: a first connecting member 228, the first connecting member 228 being fixed to an outer peripheral side of the main sleeve 202; the second connecting piece 230 is movably sleeved on the outer peripheral side of the main sleeve 202; wherein the first connector 228 and the second connector 230 are adapted to be positioned on the respective inner and outer sides of the tank wall 12 and clamp the tank wall 12 therebetween to secure the primary sleeve 202 to the tank wall 12.
Specifically, the first connector 228 may be secured to the first end 214 of the main sleeve 202. The first connector 228 may be from the first end 214 of the main sleeve 202 in the transverse direction D of the main sleeve 202TAn outwardly projecting shoulder. The shoulder 228 may be integral with the main sleeve 202And (5) molding. Further, the shoulder 228 may extend as an annular shoulder along the entire periphery of the main sleeve. The second connection member 230 may be cylindrical and have an internal thread, and accordingly, the main sleeve 202 has an external thread to be coupled with the internal thread of the second connection member 230, and the second connection member 230 is threadedly coupled to the main sleeve 202 such that the second connection member 230 can be inserted in the longitudinal direction D of the main sleeve 202LAnd (6) moving. The main sleeve 202 may be secured to the tank wall 12 by clamping the tank wall 12 between the shoulder 228 and the second connector 230 by adjusting the second connector 230.
The battery pack puncture sealing tool 200 may also include an annular sealing member 232. A seal member 232 may be disposed between the shoulder 228 and the tank wall 12 to sealingly secure the main sleeve 202 to the tank wall 12. The sealing member 232 may be made of high temperature resistant fluororubber.
Fig. 7 shows a battery pack needle sealing tool 300 according to a third embodiment of the present invention. The battery pack needle sealing tool 300 according to the third embodiment is substantially the same as the battery pack needle sealing tool 200 according to the second embodiment, except for the manner of fixing the main sleeve 302. The differences will be mainly described below, and the same parts will not be described again.
The battery pack needling sealing tool 300 may also include: a first connector 328 and a second connector 330. First connection 328 is from first end 314 of main sleeve 302 in a transverse direction D of main sleeve 302TA first flange projecting outwardly. First flange 328 may be integrally formed with main sleeve 302. The second connecting member 330 is a second flange 330 fitted around the outer periphery of the main sleeve 302. The first flange 328 and the second flange 330 may be connected by bolts (not shown) to clamp the tank wall 12 between the first flange 328 and the second flange 330, thereby securing the main sleeve 302 to the tank wall 12.
The side of the first flange 328 facing the tank wall 12 may be designed to conform to the inner surface of the tank wall 12 and the side of the second flange 330 facing the tank wall 12 may be designed to conform to the outer surface of the tank wall 12 for better securement.
The battery pack puncture sealing tool 300 may also include a sealing member 332. A sealing member 332 may be disposed between the first flange 328 and the tank wall 12 to sealingly secure the main sleeve 302 to the tank wall 12.
In the present invention, the terms "connected" and "connecting" should be interpreted broadly, for example, the term "connected" may be a fixed connection, a detachable connection, or an integrated connection; "connected" may be direct connection or indirect connection through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
It should be understood that the embodiments shown in fig. 1-7 are merely illustrative of the shape, size and arrangement of the various optional components of the battery pack needle sealing tool according to the present invention, however, they are merely illustrative and not limiting, and that other shapes, sizes and arrangements may be adopted without departing from the spirit and scope of the present invention.
Claims (15)
1. The utility model provides a sealed frock of battery package acupuncture, a serial communication port, sealed frock of battery package acupuncture is suitable for fixing on the box of battery package, sealed frock of battery package acupuncture includes:
a main sleeve adapted to extend through a wall of the tank and sealingly secured to the wall, the main sleeve defining a needle channel extending in a needle direction through which a test needle passes;
a seal positioned within the main sleeve and adapted to seal a gap between the test needle and an inner circumferential surface of the main sleeve when the test needle penetrates into the case through the needle penetration passage.
2. The battery pack needle-punching sealing tool according to claim 1, wherein the main sleeve includes a limit step provided on an inner peripheral side thereof, and the sealing member is positioned on the limit step.
3. The battery pack needle sealing tool of claim 2, further comprising an adjustment member movably disposed within the main sleeve and pressing against the seal to adjust a seal compressibility of the seal.
4. The battery pack needling sealing tool according to claim 3, wherein the adjusting member and the limit step are arranged at intervals along the needling direction, the sealing member is positioned between the limit step and the adjusting member,
wherein the adjustment member is cylindrical and has an external thread, the main sleeve has a mating internal thread, and the adjustment member is threadedly connected to the main sleeve.
5. The battery pack needling sealing tool according to claim 4, wherein the peripheral surface of the adjusting member is coated with a high temperature resistant sealant.
6. The battery pack needling sealing tool according to claim 4, wherein the battery pack needling sealing tool includes a plurality of sealing elements arranged at intervals along the needling direction, and corresponding limiting steps and adjusting members.
7. The battery pack needling sealing tool according to any one of claims 1 to 6, wherein the surface of the main sleeve is subjected to an insulation treatment.
8. The battery pack needling sealing tool according to any one of claims 1 to 6, wherein the seal is made of high temperature resistant fluororubber.
9. The battery pack needle sealing tool of any one of claims 1 to 6, further comprising a guide sleeve for guiding the test needle, the guide sleeve being sleeved at an end of the main sleeve adapted to be positioned outside the case.
10. The battery pack needle sealing tool of any one of claims 1 to 6, wherein the main sleeve is adapted to be welded to the tank wall.
11. The battery pack needle-punching sealing tool according to any one of claims 1 to 6, further comprising:
the first connecting piece is fixed on the outer peripheral side of the main sleeve; and
the second connecting piece is movably sleeved on the outer peripheral side of the main sleeve;
wherein the first and second connectors are adapted to be positioned on respective inner and outer sides of the tank wall and clamp the tank wall therebetween to secure the primary sleeve to the tank wall.
12. The battery pack needle sealing tool according to claim 11, wherein the first connecting member is a shoulder portion protruding outward from the main sleeve in a transverse direction of the main sleeve, the second connecting member is cylindrical and has an internal thread, the main sleeve has a mating external thread, and the second connecting member is screwed to the main sleeve.
13. The battery pack needling sealing tool according to claim 11, wherein the first connecting piece is a first flange protruding outward from the main sleeve in a transverse direction of the main sleeve, the second connecting piece is a second flange, and the first flange and the second flange are connected by bolts.
14. The battery pack needle sealing tool of claim 11, wherein the first connector is integrally formed with the main sleeve.
15. The battery pack needle-punch seal tooling of claim 11 further comprising a seal member adapted to be disposed between the first connector and the tank wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021146870.7U CN212658646U (en) | 2020-06-19 | 2020-06-19 | Battery package acupuncture seals frock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021146870.7U CN212658646U (en) | 2020-06-19 | 2020-06-19 | Battery package acupuncture seals frock |
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| Publication Number | Publication Date |
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| CN212658646U true CN212658646U (en) | 2021-03-05 |
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| CN202021146870.7U Active CN212658646U (en) | 2020-06-19 | 2020-06-19 | Battery package acupuncture seals frock |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022122104A1 (en) | 2022-09-01 | 2024-03-07 | Bayerische Motoren Werke Aktiengesellschaft | Method for preparing a short-circuit test of a battery cell of an energy storage device and an energy storage device |
-
2020
- 2020-06-19 CN CN202021146870.7U patent/CN212658646U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022122104A1 (en) | 2022-09-01 | 2024-03-07 | Bayerische Motoren Werke Aktiengesellschaft | Method for preparing a short-circuit test of a battery cell of an energy storage device and an energy storage device |
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