Fixture and test device for cylindrical battery cell
By designing multifunctional fixtures and test devices, the problems of unstable clamping of cylindrical cells and inaccurate test results are solved, and a more efficient test process and resource utilization are achieved.
Patent Information
- Application Number
- CN202323566699.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-25
AI Technical Summary
The existing fixtures cannot stably clamp the cylindrical battery cells, resulting in inaccurate test results, and different tooling needs to be designed in different tests, resulting in waste of resources.
A clamp including a base plate, a first clamp, a second clamp and a cover plate is designed to fix the cylindrical cell in vertical and horizontal directions by providing through holes and grooves, and combine a vibration assembly, an extrusion assembly and a needle puncture assembly , provides multi-functional testing equipment.
It improves the clamping stability of the cylindrical battery cells and the accuracy of the test results, reduces resource waste, and reduces design and procurement costs.
Smart Images
Figure CN222155256U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cylindrical battery core testing, in particular to a fixture and a testing device for cylindrical battery cores. Background Art
[0002] For cylindrical batteries, since the outer shell of the cylindrical battery is an arc shape, during the specific test process, the cylindrical battery is clamped by an existing clamp. The existing clamp cannot ensure that the cylindrical battery is in a stably clamped state, so that during the test process, the test battery is inconsistent with the actual installation condition of the cylindrical battery in the battery pack, which can easily cause inaccurate test results. Utility Model Content
[0003] The utility model aims to solve the problem that the existing clamping fixture has an unstable clamping state on the cylindrical battery core, and can improve the accuracy of the test results of the cylindrical battery core without affecting the structure of the cylindrical battery core itself.
[0004] To this end, an embodiment of one aspect of the present utility model provides a clamp for a cylindrical battery cell.
[0005] Another aspect of the present invention provides a test device having the clamp.
[0006] The clamp according to the embodiment of the first aspect of the utility model includes: a base plate, a first through hole is provided on the base plate, the cylindrical battery cell is suitable for being placed on the base plate, and the negative electrode column of the cylindrical battery cell is suitable for being arranged in the first through hole; a first clamping plate, a first groove is provided on the first clamping plate; a second clamping plate, a second groove is provided on the second clamping plate, the first clamping plate and the second clamping plate are arranged on the base plate, the first groove and the second groove cooperate with each other to clamp on the side of the cylindrical battery cell; a cover plate, a second through hole is provided on the cover plate, the cover plate is arranged above the first clamping plate, the second clamping plate and the cylindrical battery cell, and the positive electrode column of the cylindrical battery cell is suitable for being arranged in the second through hole.
[0007] According to the clamp of the embodiment of the utility model, the cylindrical battery cell can be fixed in the vertical direction by providing the bottom plate and the cover plate, and the side of the cylindrical battery cell can be fixed in the horizontal direction by providing the first clamping plate and the second clamping plate, thereby effectively improving the clamping capacity of the clamp.
[0008] In some embodiments, a third through hole is disposed on the side wall of the first clamping plate, the third through hole is communicated with the first groove, and the cylindrical battery cell can be subjected to an extrusion test and a puncture test through the third through hole.
[0009] In some embodiments, a fourth through hole is disposed on the side wall of the second clamping plate, the fourth through hole is communicated with the second groove, and the fourth through hole and the third through hole are disposed opposite to each other.
[0010] In some embodiments, the clamp also includes a first fixing member, and first fixing holes are correspondingly arranged on the first clamp plate and the second clamp plate. The first fixing member is sequentially inserted into the first fixing holes on the first clamp plate and the second clamp plate to fix the first clamp plate and the second clamp plate together.
[0011] In some embodiments, the clamp further includes a plurality of second fixing members, the bottom plate and the cover plate are provided with second fixing holes, and the top and bottom of the first clamp plate and the second clamp plate are provided with third fixing holes. The second fixing members are sequentially inserted into the second fixing holes and the third fixing holes to fix the cover plate to the top of the first clamp plate and the second clamp plate, and to fix the bottom plate to the bottom of the first clamp plate and the second clamp plate.
[0012] In some embodiments, the second fixing hole is a long waist-shaped hole, and the third fixing hole is a circular hole.
[0013] According to an embodiment of the second aspect of the utility model, a testing device for a cylindrical battery cell comprises the fixture and the testing mechanism described in any one of the above embodiments, and the testing mechanism is used to test the cylindrical battery cell.
[0014] In some embodiments, the test mechanism includes a vibration assembly, and the vibration assembly includes a vibration plate and a fixed pressure plate. The fixture is arranged on the vibration plate, and the fixed pressure plate is arranged on the top of the fixture, and the fixed pressure plate is connected to the vibration plate.
[0015] In some embodiments, the test mechanism includes a pressing assembly, the pressing assembly includes a pressing base and a pressurizer, the fixture is disposed on the pressing base, and the pressurizer can perform a pressing test on the cylindrical battery cell from the first through hole, the second through hole, or the third through hole.
[0016] In some embodiments, the test mechanism includes a puncture assembly, and the puncture assembly includes a puncture base and a probe. The fixture is arranged on the puncture base, and the probe can perform a puncture test on the cylindrical battery cell through the first through hole, the second through hole, or the third through hole.
[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, rather than limiting the present disclosure. Other features and aspects of the present disclosure will become more apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 It is a schematic diagram of a clamp according to an embodiment of the utility model.
[0020] Figure 2 yes Figure 1 An exploded view of the fixture shown.
[0021] Figure 3 It is a schematic diagram of a test device according to an embodiment of the utility model.
[0022] Figure 4 2 is another schematic diagram of a test device according to an embodiment of the present invention.
[0023] Figure 5 It is another schematic diagram of a test device according to an embodiment of the utility model.
[0024] Reference numerals:
[0025] The clamp 100, the cylindrical battery cell 101, the bottom plate 10, the first through hole 11, the second fixing hole 12, the first clamping plate 20, the first groove 21, the third through hole 22, the first fixing hole 23, the third fixing hole 24, the second clamping plate 30, the second groove 31, the fourth through hole 32, the cover plate 40, the second through hole 41, the first fixing member 50, and the second fixing member 60.
[0026] The test device 200 includes a vibration assembly 210 , a vibration plate 211 , a fixed pressing plate 212 , an extrusion assembly 220 , an extrusion base 221 , an extruder 222 , a puncture assembly 230 , a puncture base 231 , and a probe 232 . DETAILED DESCRIPTION
[0027] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] It should be noted that in new energy power batteries, battery cells are the most basic and important component, and their performance directly determines whether the performance of the power battery meets customer needs.
[0029] When multiple battery cells are integrated into a pack and installed in a vehicle, how to ensure that the test results are closer to the actual use results? The final test results will also become an important basis for the subsequent design and development of the battery cells.
[0030] The fixture in the prior art has the following disadvantages during the test:
[0031] 1. Since the cylindrical battery cell shell is in an arc shape, the corresponding clamp is required to have a corresponding curvature. The clamp in the prior art cannot ensure that the battery cell is in a stable clamping state.
[0032] 2. Since the battery cell is not fully clamped, the force on the battery cell is uneven during the vibration test, and the vibration cannot be fully transmitted, so the accuracy of the test results cannot be guaranteed.
[0033] 3. When a cylindrical battery cell is subjected to an extrusion or puncture test, since the battery cell itself is cylindrical, when the test equipment contacts the battery cell, sliding may occur, causing the battery cell to shift, thereby affecting the accuracy of the test results.
[0034] 4. Vibration, extrusion and puncture tests require the design of different types of tooling, which increases procurement costs and causes waste of resources.
[0035] The utility model aims to solve the problem that the existing clamping fixture has an unstable clamping state on the cylindrical battery core, and can improve the accuracy of the test results of the cylindrical battery core without affecting the structure of the cylindrical battery core itself.
[0036] like Figure 1-Figure 2 As shown, the clamp 100 according to the embodiment of the first aspect of the present utility model includes a base plate 10 , a first clamping plate 20 , a second clamping plate 30 and a cover plate 40 .
[0037] A first through hole 11 is provided on the bottom plate 10 , and the cylindrical battery cell 101 is suitable for being placed on the bottom plate 10 , and the negative electrode column of the cylindrical battery cell 101 is suitable for being arranged in the first through hole 11 .
[0038] Specifically, Figure 1-Figure 2 As shown, the bottom plate 10 is a square plate, and a first through hole 11 is arranged in the middle of the bottom plate 10 , thereby facilitating the placement of a cylindrical battery cell 101 on the bottom plate 10 , and the negative electrode column of the cylindrical battery cell 101 is suitable for being arranged in the first through hole 11 .
[0039] The first clamping plate 20 is provided with a first groove 21 , and the second clamping plate 30 is provided with a second groove 31 . The first clamping plate 20 and the second clamping plate 30 are arranged on the bottom plate 10 , and the first groove 21 and the second groove 31 cooperate with each other to be clamped on the side of the cylindrical battery cell 101 .
[0040] Specifically, Figure 1-Figure 2 As shown, the first clamping plate 20 and the second clamping plate 30 have the same structure, which is conducive to reducing the design cost and processing cost. The cross-sections of the first groove 21 and the second groove 31 are both semicircular, so the first groove 21 and the second groove 31 cooperate with each other to form a cylindrical cavity, which can fit tightly on the side of the cylindrical battery cell 101. Therefore, the clamping effect of the first clamping plate 20 and the second clamping plate 30 is effectively improved.
[0041] The cover plate 40 is provided with a second through hole 41 . The cover plate 40 is disposed above the first clamping plate 20 , the second clamping plate 30 and the cylindrical battery cell 101 . The positive electrode column of the cylindrical battery cell 101 is suitable for being disposed in the second through hole 41 .
[0042] According to the clamp 100 of the embodiment of the utility model, the cylindrical battery cell 101 can be fixed in the vertical direction by providing the bottom plate 10 and the cover plate 40, and the side of the cylindrical battery cell 101 can be fixed in the horizontal direction by providing the first clamping plate 20 and the second clamping plate 30. Thus, the clamping capacity of the clamp 100 is effectively improved.
[0043] In some embodiments, Figure 1-Figure 2 As shown, a third through hole 22 is provided on the side wall of the first clamping plate 20 , and the third through hole 22 is connected to the first groove 21 . The cylindrical battery cell 101 can be subjected to an extrusion test and a needle puncture test through the third through hole 22 .
[0044] Specifically, Figure 1-Figure 2 As shown, the third through hole 22 is arranged on the outer side of the first clamping plate 20, the first groove 21 is arranged on the inner side of the first clamping plate 20, and the third through hole 22 is connected to the first groove 21. Therefore, when the cylindrical battery cell 101 is subjected to an extrusion test and a puncture test, the test mechanism can be inserted from the third through hole 22, and the cylindrical battery cell 101 will not slide, rotate or shake during the test, which effectively improves the accuracy of the test results.
[0045] In some embodiments, Figure 1-Figure 2 As shown, a fourth through hole 32 is disposed on the side wall of the second clamping plate 30 , the fourth through hole 32 is communicated with the second groove 31 , and the fourth through hole 32 and the third through hole 22 are disposed opposite to each other.
[0046] Specifically, Figure 1-Figure 2As shown, the fourth through hole 32 is arranged on the outer side of the second clamping plate 30, the second groove 31 is arranged on the inner side of the second clamping plate 30, and the fourth through hole 32 is connected with the second groove 31, and the fourth through hole 32 and the third through hole 22 are arranged opposite to each other. Therefore, when the cylindrical battery cell 101 is subjected to a needle puncture test, the test mechanism can be inserted from the third through hole 22 and extended from the fourth through hole 32, and the cylindrical battery cell 101 will not slide, rotate or shake during the test, which effectively improves the accuracy of the test results.
[0047] In some embodiments, Figure 1-Figure 2 As shown, the clamp 100 also includes a first fixing member 50, and the first clamping plate 20 and the second clamping plate 30 are correspondingly provided with first fixing holes 23. The first fixing member 50 is sequentially inserted into the first fixing holes 23 on the first clamping plate 20 and the second clamping plate 30 to fix the first clamping plate 20 and the second clamping plate 30 together.
[0048] Specifically, Figure 1-Figure 2 As shown, a plurality of first fixing holes 23 are provided on the first clamping plate 20, and correspondingly, a plurality of first fixing holes 23 are also provided on the second clamping plate 30. The first fixing members 50 are sequentially inserted into the corresponding first fixing holes 23 to fix the first clamping plate 20 and the second clamping plate 30 together. Thus, the clamping stability of the clamp 100 is effectively improved.
[0049] Preferably, the first fixing member 50 is a screw, and the first fixing hole 23 is a threaded hole.
[0050] In some embodiments, Figure 1-Figure 2 As shown, the clamp 100 further includes a plurality of second fixing members 60, the bottom plate 10 and the cover plate 40 are provided with second fixing holes 12, and the top and bottom of the first clamp plate 20 and the second clamp plate 30 are provided with third fixing holes 24. The second fixing members 60 are sequentially inserted into the second fixing holes 12 and the third fixing holes 24 to fix the cover plate 40 to the top of the first clamp plate 20 and the second clamp plate 30, and to fix the bottom plate 10 to the bottom of the first clamp plate 20 and the second clamp plate 30.
[0051] Specifically, Figure 1-Figure 2 As shown, the bottom plate 10 and the cover plate 40 are provided with second fixing holes 12, and correspondingly, the top and bottom of the first clamping plate 20 and the second clamping plate 30 are provided with third fixing holes 24. The second fixing member 60 is sequentially inserted into the second fixing hole 12 and the third fixing hole 24 to fix the cover plate 40 on the top of the first clamping plate 20 and the second clamping plate 30, and fix the bottom plate 10 on the bottom of the first clamping plate 20 and the second clamping plate 30. Thus, the clamping stability of the clamp 100 is effectively improved.
[0052] In some embodiments, Figure 1-Figure 2As shown, the second fixing hole 12 is a long waist-shaped hole, and the third fixing hole 24 is a circular hole.
[0053] Specifically, Figure 1-Figure 2 As shown, the second fixing hole 12 is a long waist-shaped hole, which is conducive to the base plate 10 and the cover plate 40 to adapt to the first clamping plate 20 and the second clamping plate 30 of different sizes.
[0054] like Figure 1-Figure 5 As shown, a test device 200 for a cylindrical battery cell 101 according to an embodiment of the second aspect of the utility model comprises a fixture 100 and a test mechanism according to any of the above embodiments, and the test mechanism is used to test the cylindrical battery cell 101 .
[0055] In some embodiments, Figure 3 As shown, the test mechanism includes a vibration assembly 210, and the vibration assembly 210 includes a vibration plate 211 and a fixed pressure plate 212. The fixture 100 is arranged on the vibration plate 211, and the fixed pressure plate 212 is arranged on the top of the fixture 100, and the fixed pressure plate 212 is connected to the vibration plate 211.
[0056] Specifically, Figure 3 As shown, when performing a vibration test on a cylindrical battery cell 101, the vibration assembly 210 includes a vibration plate 211 and a fixed pressure plate 212, as well as studs and nuts connecting the vibration plate 211 and the fixed pressure plate 212. The fixed pressure plate 212 contacts the top of the vertically placed fixture 100, applies a force toward the vibration plate 211 to the top of the fixture 100, and tightens the nut to ensure a stable connection between the fixture 100 and the vibration plate 211. At the same time, in order to ensure the stability of the connection, different numbers of studs can be set for connection.
[0057] In some embodiments, Figure 4 As shown, the test mechanism includes a pressing assembly 220, which includes a pressing base 221 and a squeezer 222. The fixture 100 is disposed on the pressing base 221, and the squeezer 222 can perform a pressing test on the cylindrical battery cell 101 from the first through hole 11, the second through hole 41, or the third through hole 22.
[0058] It is understandable that if Figure 4 As shown, based on the axial direction of the cylindrical battery cell 101 , the fixture 100 can be placed vertically or horizontally on the extrusion base 221 . The extrusion base 221 is an L-shaped angle plate, and the extrusion base 221 can provide support for the fixture 100 .
[0059] It is understandable that if Figure 4 As shown, the squeezer 222 can perform a squeeze test on the cylindrical battery cell 101 from the first through hole 11 , the second through hole 41 , or the third through hole 22 .
[0060] In some embodiments, Figure 5 As shown, the test mechanism includes a puncture assembly 230, which includes a puncture base 231 and a probe 232. The fixture 100 is set on the puncture base 231, and the probe 232 can perform a puncture test on the cylindrical battery cell 101 through the first through hole 11 or the second through hole 41 or the third through hole 22.
[0061] It is understandable that if Figure 5 As shown, based on the axial direction of the cylindrical battery cell 101 , the fixture 100 can be placed vertically or horizontally on the acupuncture base 231 . The acupuncture base 231 is an L-shaped angle plate, and the acupuncture base 231 can provide support for the fixture 100 .
[0062] It is understandable that if Figure 5 As shown, the probe 232 can perform a needle penetration test on the cylindrical battery cell 101 through the first through hole 11 or the second through hole 41 or the third through hole 22 .
[0063] In a specific embodiment of the present invention, the material of the clamp 100 is 45# steel, and the material of the stud is hot die steel.
[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and 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 therefore should not be understood as a limitation on the present invention.
[0065] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0066] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0067] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0068] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0069] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. A fixture for cylindrical battery cells, characterized in that: include: A bottom plate, wherein a first through hole is provided on the bottom plate, the cylindrical battery cell is suitable for being placed on the bottom plate, and the negative electrode column of the cylindrical battery cell is suitable for being arranged in the first through hole; A first clamping plate, wherein a first groove is provided on the first clamping plate; A second clamping plate, wherein a second groove is arranged on the second clamping plate, the first clamping plate and the second clamping plate are arranged on the bottom plate, and the first groove and the second groove cooperate with each other to clamp on the side surface of the cylindrical battery core; A cover plate is provided with a second through hole, the cover plate is arranged above the first clamping plate, the second clamping plate and the cylindrical battery cell, and the positive pole of the cylindrical battery cell is suitable for being arranged in the second through hole.
2. The fixture for cylindrical battery cells according to claim 1, characterized in that: A third through hole is provided on the side wall of the first clamping plate, and the third through hole is communicated with the first groove. The cylindrical battery cell can be subjected to an extrusion test and a puncture test through the third through hole.
3. The fixture for cylindrical battery cells according to claim 2, characterized in that: A fourth through hole is disposed on the side wall of the second clamping plate. The fourth through hole is communicated with the second groove, and the fourth through hole and the third through hole are disposed opposite to each other.
4. The fixture for cylindrical battery cells according to claim 3, characterized in that: It also includes a first fixing member, and first fixing holes are correspondingly arranged on the first clamping plate and the second clamping plate. The first fixing member is sequentially inserted into the first fixing holes on the first clamping plate and the second clamping plate to fix the first clamping plate and the second clamping plate together.
5. The fixture for cylindrical battery cells according to claim 3, characterized in that: It also includes a plurality of second fixing members, the bottom plate and the cover plate are provided with second fixing holes, and the top and bottom of the first clamping plate and the second clamping plate are provided with third fixing holes; The second fixing member is sequentially inserted into the second fixing hole and the third fixing hole to fix the cover plate on the top of the first clamping plate and the second clamping plate, and to fix the bottom plate on the bottom of the first clamping plate and the second clamping plate.
6. The fixture for cylindrical battery cells according to claim 5, characterized in that: The second fixing hole is a long waist-shaped hole, and the third fixing hole is a circular hole.
7. A test device for cylindrical battery cells, characterized in that: include: A clamp, wherein the clamp is the clamp according to any one of claims 1 to 6; A testing mechanism is used to test the cylindrical battery cell.
8. The test device for cylindrical battery cells according to claim 7, characterized in that: The test mechanism includes a vibration assembly, and the vibration assembly includes a vibration plate and a fixed pressure plate; The clamp is arranged on the vibration plate, the fixed pressing plate is arranged on the top of the clamp, and the fixed pressing plate is connected to the vibration plate.
9. The test device for cylindrical battery cells according to claim 7, characterized in that: The testing mechanism includes an extrusion assembly, and the extrusion assembly includes an extrusion base and an extruder; The fixture is arranged on the extrusion base, and the extruder can perform an extrusion test on the cylindrical battery core from the first through hole, the second through hole, or the third through hole.
10. The test device for cylindrical battery cells according to claim 7, characterized in that: The test mechanism includes an acupuncture assembly, and the acupuncture assembly includes an acupuncture base and a probe; The fixture is arranged on the puncture base, and the probe can perform a puncture test on the cylindrical battery core through the first through hole, the second through hole, or the third through hole.