CN216980826U - Utmost point ear connecting piece that battery test was used - Google Patents
Utmost point ear connecting piece that battery test was used Download PDFInfo
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- CN216980826U CN216980826U CN202122739785.2U CN202122739785U CN216980826U CN 216980826 U CN216980826 U CN 216980826U CN 202122739785 U CN202122739785 U CN 202122739785U CN 216980826 U CN216980826 U CN 216980826U
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- ratchet
- battery test
- nut
- ratchet wheel
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Abstract
The utility model discloses a tab connecting piece for battery test, which comprises a bolt, a ratchet nut and a fixing component matched with the ratchet nut, wherein the lower part of the ratchet nut is provided with a ratchet wheel, the fixing component is provided with an accommodating part, the accommodating part is provided with a limiting valve for preventing the ratchet wheel from being unscrewed, a current and voltage acquisition terminal and a tab are arranged between the head part of the bolt and the fixing component, a screw rod of the bolt is provided with an anti-rotation raised head at a position close to the head part, and an anti-rotation groove is arranged at a corresponding position of the fixing component. According to the utility model, the limiting valve is abutted against the ratchet wheel, so that the ratchet wheel can only rotate along the direction that the nut is screwed on the bolt, the bolt and the fixing component are relatively fixed by preventing the matching of the anti-rotation raised head on the screw rod and the fixing component to prevent the grooves, the pressure of the bolt and the nut on the current and voltage acquisition terminal and the electrode lug is kept near the initial pressure in a long-time charging and discharging test, the excessive increase of contact internal resistance is prevented, and the influence on the detection result is reduced.
Description
Technical Field
The utility model belongs to the technical field of battery detection, and particularly relates to a tab connecting piece for preventing tab connection from loosening during power battery testing during long-period verification.
Background
The power battery is a power supply for providing a power source for the electric tool, and is a storage battery for providing power for electric automobiles, electric trains, electric bicycles and the like. The tab is a metal conductor welded with the positive electrode current collector or the negative electrode current collector, protrudes out of the power battery, is used for electrically connecting the battery current collector with the outside, and has relatively large specification size and overcurrent capacity. In order to detect the quality of the power battery, a charge-discharge cycle test needs to be performed on the power battery, for example, a "tooling clamp for testing battery" disclosed in chinese patent literature, whose publication number CN204964561U includes a tab clamping assembly, which is used for clamping and electrically connecting a battery tab; and a wire nose connector for mounting a wire nose and electrically connected with the wire nose, wherein: the lug clamping assembly is electrically connected with the wire nose connecting piece, the tooling clamp for the battery test is additionally arranged between the battery lug and the wire nose, the battery lug is clamped by the lug clamping assembly in the tooling clamp for the battery test, and the wire nose is connected and installed by the wire nose connecting piece in the tooling clamp for the battery test, so that the battery lug and the wire nose are conveniently connected through the bridge action of the tooling clamp for the battery test, the wire nose can be connected with a thicker wire, the defect that the wire nose is inconvenient to install and connect with the battery lug is overcome, the detection efficiency is improved, the connection efficiency is not high enough, and when the number of the interfaces is increased, the stable contact of the interfaces cannot be ensured.
The other scheme is as follows: the positive and negative electrode lugs of the battery are respectively perforated by a perforator, and then the current and voltage output ends of the charging and discharging equipment and the charging and discharging equipment are fixed together by bolts, so that the nut is loosened due to mechanical vibration of an equipment compressor and the like when the incubator runs, and particularly, when long-time test and verification are carried out, the contact effect between the positive and negative electrode lugs of the battery core and a copper terminal or between an upper pressing plate and a lower pressing plate is poor due to mechanical vibration or temperature change inside a connecting piece, the contact internal resistance is large, and the analysis of the verification result is influenced; the battery tabs are connected by clamping plate pressing and alligator clamping, the pressure required for pressing the tabs is large, the pressure at each battery tab is uneven, and the pressing force is difficult to unify and measure; the pressing mode of the special-shaped threaded metal rod has no universality for lugs with different thicknesses, and the pressing contact surface of the metal rod and the contact surface of the lugs are easy to slide.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the conventional tab connecting piece for the battery test is easy to loosen, and provides a tab connecting piece and a connecting method thereof for preventing tab connection from loosening during the power battery test in long-period verification.
The utility model is realized by the following technical scheme:
the utility model provides a lug connection spare that battery test was used, includes bolt and ratchet gear nut and with ratchet gear nut matched with fixed subassembly, ratchet gear nut's upper portion is the rotating part, and the lower part is the ratchet, fixed subassembly undercut forms the portion of holding that can hold ratchet gear nut, and the portion of holding still is provided with the restriction valve that prevents the ratchet by the unscrewing, and the rotation of restriction valve in the portion of holding receives the restriction of the lateral wall of portion of holding, be provided with current and voltage acquisition terminal and utmost point ear between the head of bolt and the fixed subassembly, the bottom of the portion of holding is provided with the bolt hole, the screw rod of bolt is being equipped with near head department and prevents changeing the plush copper, and fixed subassembly corresponds the position and is provided with and prevents changeing the recess, and current and voltage acquisition terminal and utmost point ear are equipped with the through-hole that can be passed by the screw rod of bolt.
Support the ratchet through the restriction valve, make the ratchet only to be rotated by the direction of screwing up on the bolt along the nut, make nut and fixed subassembly relatively fixed, prevent the cooperation that changes the plush copper and fixed subassembly and prevent the recess through on the screw rod, make bolt and fixed subassembly relatively fixed, consequently, can guarantee in long-time charge-discharge test, the pressure of bolt and nut to current and voltage acquisition terminal and utmost point ear keeps near initial pressure, prevent to contact the increase of internal resistance too much, the influence to the testing result that significantly reduces.
Preferably, the limiting valve includes a rotating shaft fixed to a bottom surface of the housing and a limiting bar having a center portion fitted around the rotating shaft, one end of the limiting bar abuts against the ratchet teeth of the ratchet wheel, and an extension line of the limiting bar does not pass through the ratchet wheel and can rotate in the housing and is limited by the side wall of the housing, so that the rotation of the ratchet wheel in the loosening direction can be limited, and the limiting bar can be moved when the ratchet wheel and the ratchet gear nut are tightened.
Preferably, a spring is arranged between the limiting strip and the side wall of the accommodating part, the spring applies force to enable the limiting strip to point to the ratchet wheel, and the limiting strip is prevented from leaving the ratchet wheel and cannot prevent the ratchet wheel from rotating towards the unscrewing direction when no pressure exists between the ratchet wheel and the limiting strip.
Preferably, the spring is provided on the restricting bar at a position between the rotating shaft and the ratchet, and the force with which the spring abuts the ratchet is amplified by the principle of leverage.
Preferably, one end of the limiting strip, which is far away from the ratchet wheel, is provided with a smooth manual part, the distance between the manual part and the rotating shaft is larger than the distance between the rotating shaft and the position, where the limiting strip abuts against the ratchet teeth, and the limiting strip can be separated from the ratchet wheel by pressing the manual part, so that the nut and the bolt can be unscrewed.
Preferably, the bolts are flange bolts, annular grooves are formed in the surfaces of the flange plates of the flange bolts, and the arrangement of the annular grooves can increase the pressing force of the bolt heads on the contact surface of the current and voltage acquisition terminal or the lug.
Preferably, the current and voltage collecting terminal is connected with the flange bolt during connection, and one surface of the current and voltage collecting terminal facing the flange bolt is provided with a tiny deformation hole corresponding to the position of the annular groove, so that the functions of heat dissipation and expansion accommodation are achieved under the condition that the contact area between the current and voltage collecting terminal and a flange plate of the flange bolt is not reduced.
Preferably, the receiving portion is provided with a cover plate above the limiting valve for protecting the limiting valve and making the appearance more beautiful.
Therefore, the utility model has the following beneficial effects:
the limiting valve is abutted against the ratchet wheel, so that the ratchet wheel can only rotate along the direction that the nut is screwed on the bolt, the nut and the fixed component are relatively fixed, and the bolt and the fixed component are relatively fixed through the matching of the anti-rotation raised head on the screw rod and the anti-rotation groove of the fixed component.
Drawings
FIG. 1 is an exploded schematic view from one side of an embodiment of the present invention;
FIG. 2 is a schematic top view of an embodiment of the present invention without a cover plate;
fig. 3 is a top view of a bolt flange face and current-voltage collecting terminal according to an embodiment of the present invention.
In the figure: the device comprises a bolt 1, an anti-rotation raised head 11, a flange 12, an annular groove 121, a ratchet nut 2, a rotating part 21, a ratchet 22, a fixing component 3, a containing part 31, a bolt hole 311, an anti-rotation groove 32, a limiting valve 4, a rotating shaft 41, a limiting strip 42, a manual part 421, a spring 43, a current and voltage acquisition terminal 5, a small deformation hole 51, a lug 6 and a through hole 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In a first embodiment, as shown in fig. 1 to 3, a tab connector for battery testing includes a bolt 1, a ratchet nut 2 and a fixing component 3 matched with the ratchet nut, the bolt is a flange bolt, an upper portion of the ratchet nut is a rotating portion 21, a lower portion of the ratchet nut is a ratchet 22, the fixing component 3 is recessed downward to form an accommodating portion 31 capable of accommodating the ratchet nut 2, the accommodating portion is further provided with a limiting valve 4 for preventing the ratchet 22 from being loosened, the limiting valve is located on a side surface of the ratchet, the limiting valve can rotate in the accommodating portion by a small angle, a current and voltage collecting terminal 5 and a tab 6 are arranged between a head portion of the bolt and the fixing component, a bolt hole 311 is arranged at a bottom of the accommodating portion 31, a screw rod of the bolt is provided with an anti-rotation protruding head 11 near the head portion, an anti-rotation groove 32 is arranged at a position corresponding to the fixing component, and the current and voltage collecting terminal 5 and the tab 6 are provided with a through hole 7 capable of being penetrated by the screw rod of the bolt. The limiting valve 4 includes a rotating shaft 41 fixed to the bottom surface of the housing, a limiting bar 42 whose middle portion is fitted over the rotating shaft, and a spring 43 connecting the limiting bar and the side wall of the housing, and the limiting bar 42 is held in contact with the ratchet 22 by the spring 43. One end of the restricting bar 42 abuts against the ratchet of the ratchet wheel 22, and the extension line of the restricting bar does not pass through the ratchet wheel, and can rotate in the accommodating part and is restricted by the side wall of the accommodating part, so that the rotation of the ratchet wheel in the loosening direction can be restricted, and the restricting bar can be shifted when the ratchet wheel and the ratchet wheel gear nut are tightened.
The limiting strip 42 of the limiting valve 4 is abutted against the ratchet wheel 22, so that the ratchet wheel can only rotate along the direction that the ratchet nut 2 is screwed on the bolt 1, the ratchet nut 2 and the fixed component 3 are relatively fixed, the bolt 1 and the fixed component 3 are relatively fixed through the matching of the anti-rotation raised head 11 on the screw rod 1 and the anti-rotation groove 32 of the fixed component 3, therefore, the pressure of the bolt 1 and the ratchet nut 2 on the current and voltage acquisition terminal 5 and the lug 6 can be kept near the initial pressure in a long-time charging and discharging test, the increase of contact internal resistance is prevented from being too much, and the influence on a detection result is reduced.
One end of the limiting strip 42 is abutted to the ratchet of the ratchet wheel 22, the other end of the limiting strip is provided with a smooth manual part 421, and the distance between the manual part 421 and the rotating shaft 41 is larger than the distance between the rotating shaft and the position where the limiting strip is abutted to the ratchet, so that the limiting strip can be easily separated from the ratchet wheel by pressing the manual part, and the nut and the bolt can be unscrewed.
The surface of the flange plate 12 of the flange bolt is provided with an annular groove 121, and the arrangement of the annular groove 121 can increase the pressing force of the head of the bolt 1 on the contact surface of the current and voltage acquisition terminal 5 or the tab 6 and play a role of a heat dissipation channel. The current and voltage acquisition terminal 5 is connected with the flange bolt when being connected, one surface of the current and voltage acquisition terminal facing the flange bolt is provided with a tiny deformation hole 51 corresponding to the position of the annular groove 121, and under the condition that the contact area between the current and voltage acquisition terminal 5 and the flange plate 12 of the flange bolt is not reduced, the current and voltage acquisition terminal and the annular groove 121 can play roles of heat dissipation and expansion accommodation, so that the pressing force change caused by expansion is reduced, and the influence on the detection result is reduced.
In addition, the receiving portion is provided with a cover plate above the limiting valve for protecting the limiting valve and making the appearance more beautiful.
The tab connecting piece for the battery test is used for carrying out the battery charge and discharge test, and the connecting method comprises the following steps:
s1: a screw rod of the flange bolt sequentially penetrates through the current and voltage acquisition terminal, the lug and the fixing assembly which are provided with screw holes, and the anti-rotation raised head is installed in the anti-rotation groove;
s2: the current and voltage acquisition terminal is connected with the charge and discharge equipment;
s3: rotating the upper part of the ratchet nut clockwise by using a torque wrench, wherein the ratchet of the ratchet nut rotates and stirs the limiting strip of the limiting valve;
s4: when the torque of the torque wrench reaches a predetermined value, the rotation of the ratchet nut is stopped, and at this time, the limiting valve is pressed against the ratchet to fix the ratchet.
After the connection is finished, the charging and discharging cycle can be carried out, and the charging and discharging cycle comprises the following steps:
SS 1: discharging the battery to 2.5V at 1C, and standing until the surface temperature of the battery is less than or equal to 27 ℃;
SS 2: charging to 4.2V at a constant current of 1C, stopping charging when the current is less than or equal to 0.05C, and standing until the surface temperature of the battery is less than or equal to 27 ℃;
SS 3: the charge and discharge cycles from SS1 to SS2 were repeated 500 times, and SOH (battery capacity, health, performance status) tests were performed every 100 times.
The following table is comparative data for the torque change of the bolt between the comparative example and the present example, which are different from each other: common bolts and nuts are adopted, wherein 1#, 2#, and 3# are connected by adopting the first embodiment, and 4#, 5#, and 6# are comparative examples.
Therefore, the utility model has the following beneficial effects:
the limiting valve is abutted against the ratchet wheel, so that the ratchet wheel can only rotate along the direction that the nut is screwed on the bolt, the nut and the fixed assembly are relatively fixed, and the bolt 1 and the fixed assembly are relatively fixed through the matching of the anti-rotation raised head on the screw rod and the anti-rotation groove of the fixed assembly, so that the pressure of the bolt and the nut on the current and voltage acquisition terminal and the electrode lug can be kept near the initial pressure in a long-time charge and discharge test, the excessive increase of contact internal resistance is prevented, and the influence on a detection result is reduced; the arrangement of the annular groove can increase the pressing force of the bolt head on the contact surface of the current and voltage acquisition terminal or the lug; the arrangement of the tiny deformation holes can play a role in heat dissipation and expansion accommodation under the condition that the contact area between the current and voltage acquisition terminal and the flange plate of the flange bolt is not reduced.
Claims (8)
1. The utility model provides a tab connection spare that battery test was used, includes bolt and ratchet gear nut and with ratchet gear nut matched with fixed subassembly, its characterized in that, ratchet gear nut's upper portion is the rotating part, and the lower part is the ratchet, fixed subassembly undercut forms the portion of holding that can hold ratchet gear nut, and the portion of holding still is provided with the limiting valve that prevents the ratchet by the unscrewing, and the rotation of limiting valve in the portion of holding receives the restriction of the lateral wall of portion of holding, be provided with current voltage acquisition terminal and utmost point ear between the head of bolt and the fixed subassembly, the bottom of the portion of holding is provided with the bolt hole, the screw rod of bolt is equipped with near head department and prevents changeing the plush copper, and fixed subassembly corresponding position is provided with prevents changeing the recess, and current voltage acquisition terminal and utmost point ear are equipped with the through-hole that can be passed by the screw rod of bolt.
2. The tab connector for battery test as set forth in claim 1, wherein: the limiting valve comprises a rotating shaft fixed on the bottom surface of the accommodating part and a limiting strip, the middle of the limiting strip is sleeved on the rotating shaft, and one end of the limiting strip abuts against the ratchet of the ratchet wheel.
3. The tab connector for battery test as set forth in claim 2, wherein: and a spring is arranged between the limiting strip and the side wall of the accommodating part, and the force application direction of the spring enables the limiting strip to point to the ratchet wheel.
4. The tab connector for battery test as set forth in claim 3, wherein: the spring is arranged on the limiting strip at a position between the rotating shaft and the ratchet wheel.
5. The tab connector for battery test as set forth in claim 2, 3 or 4, wherein: one end of the limiting strip, which is far away from the ratchet wheel, is provided with a manual part, and the distance between the manual part and the rotating shaft is greater than the distance between the rotating shaft and the position of the limiting strip, which is abutted against the ratchet.
6. The tab connector for battery test as set forth in claim 1, 2, 3 or 4, wherein: the bolts are flange bolts, and annular grooves are formed in the surfaces of the flange plates of the flange bolts.
7. The tab connector for battery test as set forth in claim 6, wherein: the current and voltage acquisition terminal is connected with the flange plate when being connected, and one surface of the current and voltage acquisition terminal, which faces the flange bolt, is provided with a deformation hole corresponding to the position of the annular groove.
8. The tab connector for battery test as set forth in claim 1, 2, 3 or 4, wherein: the accommodating portion is provided with a cover plate above the limiting valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122739785.2U CN216980826U (en) | 2021-11-08 | 2021-11-08 | Utmost point ear connecting piece that battery test was used |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122739785.2U CN216980826U (en) | 2021-11-08 | 2021-11-08 | Utmost point ear connecting piece that battery test was used |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216980826U true CN216980826U (en) | 2022-07-15 |
Family
ID=82343120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122739785.2U Active CN216980826U (en) | 2021-11-08 | 2021-11-08 | Utmost point ear connecting piece that battery test was used |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216980826U (en) |
-
2021
- 2021-11-08 CN CN202122739785.2U patent/CN216980826U/en active Active
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