Performance test tool for battery cell with liquid cooling channel
The performance testing tooling with its own liquid cooling channel solves the problem of insufficient thermal management of battery cells in the existing technology, realizes high-precision and low-cost battery cell performance testing, and enhances the flexibility and efficiency of testing.
Patent Information
- Application Number
- CN202422505019.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-16
AI Technical Summary
Existing battery cell performance test tooling cannot effectively simulate the thermal management of real-world usage environments, resulting in poor precision and accuracy in test results. In addition, the laser welding of aluminum busbars increases connection resistance and costs.
A performance test fixture with its own liquid cooling channel was designed. The internal cooling of the battery cell was achieved through cylinder assemblies and liquid-cooled pressure blocks. The pressure column unit was directly connected to the pole to avoid welding aluminum bars, and elastic contact points were used to improve test accuracy and flexibility.
It achieves rapid cooling inside the battery cell, improves the simulation and accuracy of the test, reduces the difficulty and cost of operation, and enhances the flexibility and efficiency of the test.
Smart Images
Figure CN223347020U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a performance testing tool for an electric core with a liquid cooling channel. Background Art
[0002] With the rapid development of electric vehicles, energy storage battery systems, mobile power supplies and other fields, the heat dissipation problem of lithium batteries has become increasingly prominent. Through the liquid cooling system, the temperature of the lithium battery can be effectively controlled to keep it operating within the appropriate working range, thereby improving the performance and service life of the battery. At present, the positive and negative poles of mainstream battery cells are mostly led out from the same side. When performing performance tests on them, the performance test tool connects the positive and negative test lines of the test equipment to the top pressure test poles of the tool respectively, and presses the top pressure test poles onto the positive and negative poles of the battery cell through the driving mechanism such as the cylinder or slide rail provided by the tool, thereby realizing the performance test of the battery cell by the test equipment.
[0003] For battery cells with built-in liquid cooling channels, existing techniques simulate real-world cell usage by controlling the test environment or by placing the cell under test upright or lying on a liquid-cooled plate for testing. However, this test environment control only manages the actual operating environment and cannot simulate or replicate the thermal management of the cell under test during actual use. During use, the heat generated at the geometric center of the cell is highest, and it takes time for this heat to transfer to the cell surface and the operating environment. Therefore, this type of environmental control does not effectively reduce the cell temperature, and there is always a temperature difference between the operating environment and the cell temperature. As a result, the test results produced by this type of test fixture have poor precision and accuracy. Furthermore, some laboratory-level performance tests do not use specialized test fixtures. Instead, they laser-weld aluminum busbars with test lead connectors to the positive and negative poles of the cell, then connect the test leads to the busbars to achieve electrical performance testing. Laser welding the busbars increases the interface resistance between the busbar and the poles, as well as the material connection resistance, resulting in reduced accuracy. It also wastes materials and increases costs. Furthermore, the busbars are difficult to remove after testing, which reduces product testing flexibility.
[0004] For this purpose, this application is filed. Utility Model Content
[0005] In view of the above-mentioned shortcomings of the prior art, the utility model provides a performance testing tool for a battery cell with a built-in liquid cooling channel.
[0006] In order to achieve the above-mentioned purpose, the main technical solutions adopted by this utility model include:
[0007] A performance testing tool for a battery cell with a liquid cooling channel, which is used for performing performance testing on the battery cell. One end of the battery cell is provided with a battery cell pole, a battery cell liquid cooling channel and an explosion-proof valve, comprising: a base plate, a bracket and two cylinder assemblies, the bracket is provided in the middle of the base plate, the two cylinder assemblies are respectively provided on opposite sides of the bracket and fixedly connected to the base plate; the cylinder assembly comprises: a top block unit, a bracket and a cylinder unit, the top block unit is fixedly connected to the cylinder unit through the bracket; the top block unit comprises a base plate, a liquid cooling block, a support frame, a hose quick-connect plug, a current testing plate, a support frame cover plate and an external hose, the base plate is fixedly connected to the support frame cover plate through the support frame, the liquid cooling block is elastically and telescopically connected to the support frame cover plate, a through hole is provided on the liquid cooling block, the through hole is connected to the external hose through the hose quick-connect plug, and long strip holes for the liquid cooling block to pass through are distributed on the base plate;
[0008] It also includes two pressure column units, which are respectively arranged on two substrates or simultaneously arranged on the same substrate. The pressure column unit includes a conductive pressure column body and a voltage monitoring probe elastically fixed in the pressure column body. The pressure column body is fixedly connected to the substrate, and the current testing plate is in contact with the pressure column body.
[0009] Preferably, the outer surface of the liquid-cooling pressing block is further provided with a sealing rubber ring that matches the liquid-cooling channel structure of the battery cell.
[0010] Preferably, a through hole is provided on the substrate corresponding to the explosion-proof valve.
[0011] Preferably, two support columns are provided on the support frame cover plate, springs are clamped on the support columns, the liquid cooling pressing block is connected to the free ends of the two support columns, and the liquid cooling pressing block is elastically retractable under the action of the springs.
[0012] Preferably, the pressure column unit includes: a pressure column body, an insulating block, a fixed block and a voltage monitoring probe. The pressure column body is provided with a mounting through hole along the axial direction. The insulating block is placed in the mounting through hole and a retaining spring is provided in the insulating block. The fixed block is located above the insulating block and is threadedly connected to the mounting through hole. The voltage monitoring probe is installed on the pressure column body through the fixed block and can elastically move telescopically along the axial direction of the pressure column body.
[0013] Preferably, a mounting hole is provided on the base plate, and the cross section of the pressure column body is a T-shaped structure, the T-shaped structure includes a horizontal portion and a vertical portion, the horizontal portion is located outside the mounting hole, and the vertical portion passes through the mounting hole and is fixed to the base plate.
[0014] Preferably, the current testing plate is an L-shaped structure, one end of the L-shaped structure is fixedly connected to the pressure column body, and the other end is provided with a connection hole.
[0015] Preferably, the bracket is a U-shaped structure, and notches are formed in the middle of two side walls of the U-shaped structure.
[0016] Preferably, a groove is provided in the middle of the base plate, the bracket is fixed in the groove, and the two cylinder assemblies are respectively fixed on opposite sides of the groove.
[0017] Preferably, the support frame cover is provided with an outlet hole for leading out an external hose.
[0018] Compared with the prior art, the present invention has at least the following beneficial effects:
[0019] (1) It has a built-in liquid cooling interface, which can cool the inside of the battery cell, achieve rapid and effective cooling of the battery cell, and restore the real use environment to the greatest extent, with high simulation and more accurate testing;
[0020] (2) When cooling the inside of the battery cell, the built-in liquid cooling block can achieve elastic compression, which increases the flexibility of the tooling;
[0021] (3) No need to weld aluminum bars. During testing, the positive and negative currents and voltages can be directly connected to the positive and negative poles of the battery cell to be tested, which improves the accuracy of performance testing.
[0022] (4) The structural design of this performance test tooling is scientific and reasonable, with low manufacturing cost and low operating difficulty. It also has good adaptability to product size, so it is flexible to use and has high testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0024] Figure 1 It is a structural diagram of the utility model;
[0025] Figure 2 for Figure 1 Exploded diagram;
[0026] Figure 3 for Figure 1 Schematic diagram of the structure of the middle cylinder assembly;
[0027] Figure 4 for Figure 3 Exploded diagram;
[0028] Figure 5 for Figure 4 Schematic diagram of the structure of the middle top block unit;
[0029] Figure 6 for Figure 5 Exploded diagram;
[0030] Figure 7 for Figure 6 Cross-sectional view of the medium-pressure column unit;
[0031] Figure 8 This is a schematic diagram of the endpoints and interfaces for connecting to other devices in the utility model;
[0032] Figure 9 Schematic diagram of the battery cell structure.
[0033] In the figure: 1, bottom plate; 11, groove; 2, cylinder assembly; 20, top block unit; 2001, pressure column unit; 20011, pressure column body; 20012, insulation block; 20013, fixing block; 20014, voltage monitoring probe; 2002, base plate; 2003, sealing rubber ring; 2004, liquid cooling pressure block; 2005, support frame; 2006, hose quick connect plug; 2007, fixing nut; 2008, current test board; 20 09. Spring; 2010. Fixing screw V; 2011. Support column; 2012. Support frame cover; 2013. Fixing screw VI; 2014. External hose; 2015. Fixing ring; 21. Bracket; 22. Cylinder unit; 23. Fixing screw III; 24. Fixing screw IV; 3. Bracket; 31. Notch; 4. Fixing screw I; 5. Fixing screw II; 6. Battery cell; 61. Battery cell pole; 62. Battery cell liquid cooling channel; 63. Explosion-proof valve. DETAILED DESCRIPTION
[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, rather than all embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The component structures not described in detail in the following embodiments are all conventional choices in the art. The connection relationships not described in detail in the following embodiments are all connection means well known in the art.
[0035] like Figure 1-Figure 7 As shown in the figure: This utility model proposes a performance test tool for battery cells with liquid cooling channels, which is used to test the performance of battery cells. Figure 9 The battery cell 6 shown is subjected to performance testing, and one end of the battery cell 6 is provided with a battery cell pole 61, a battery cell liquid cooling channel 62 and an explosion-proof valve 63;
[0036] The invention comprises: a bottom plate 1, a bracket 3 and two cylinder assemblies 2, wherein the bracket 3 is arranged in the middle of the bottom plate 1, and the two cylinder assemblies 2 are respectively arranged on opposite sides of the bracket 3 and fixedly connected to the bottom plate 1; the cylinder assembly 2 comprises: a top block unit 20, a bracket 21 and a cylinder unit 22, wherein the top block unit 20 is fixedly connected to the cylinder unit 22 via the bracket 21; the top block unit 20 comprises a base plate 2002, a liquid cooling block 2004, a support frame 2005, a hose quick-connect plug 2006, Current test board 2008, support frame cover 2012 and external hose 2014. Base plate 2002 is fixedly connected to support frame cover 2012 via support frame 2005. Liquid cooling block 2004 is elastically and retractably connected to support frame cover 2012. Liquid cooling block 2004 is provided with a through hole, which is connected to external hose 2014 via hose quick-connect plug 2006. Base plate 2002 is distributed with long strip holes for liquid cooling block 2004 to pass through.
[0037] It also includes two pressure column units 2001, which are respectively arranged on two substrates 2002 or simultaneously arranged on the same substrate 2002. The pressure column unit 2001 includes a conductive pressure column body 20011 and a voltage monitoring probe 20014 elastically fixed in the pressure column body 20011. The pressure column body 20011 is fixedly connected to the substrate 2002, and the current testing plate 2008 is in contact with the pressure column body 20011.
[0038] In this embodiment, the installation position of the pressure column unit 2001 is selectively adjusted according to the structure of different battery cells. Specifically, if the positive and negative poles of the battery cell are led out on the same side, the two pressure column units 2001 are set on the base plate 2002 of the same cylinder assembly 2. If the positive and negative poles of the battery cell are led out on opposite sides, the two pressure column units 2001 are respectively set on the base plates 2002 of the two cylinder assemblies 2. As for whether the two pressure column units 2001 are coaxially arranged or non-coaxially arranged (misaligned), it depends on the specific position of the positive and negative poles of the battery cell. Those skilled in the art can flexibly adjust it according to actual needs. Figure 1 The figure shows the performance test fixture used when the positive and negative poles of the battery cell are led out on opposite sides and are not arranged axially with each other. Figure 1 This is only one embodiment of the present invention and is for illustration only and is not intended to limit the scope of protection of this application. Within the scope of the principles disclosed herein, those skilled in the art can also make modifications to obtain performance test fixtures of other specific structures.
[0039] In this embodiment, one end of the bracket 21 is open and the bracket 21 is hollow. After the ejection unit 20 is inserted into the bracket 21, the base plate 2002 is fixedly connected to one end of the bracket 21 by a fixing screw IV24, and the other end of the bracket 21 is fixedly connected to the piston rod of the cylinder unit 22 by a fixing screw III23.
[0040] In this embodiment, the support frame 2005 includes a support frame connection surface and four support legs. The support frame connection surface is fixedly connected to the base plate 2002 via fixing screws V2010, and the four support legs are fixedly connected to the support frame cover 2012 via fixing screws VI2013.
[0041] Take the case where two pressure column units 2001 are respectively arranged on the base plates 2002 of the two cylinder assemblies 2 to test the battery cells in which the positive and negative poles are led out from different sides and the positive and negative poles are staggered and non-axially arranged. Figure 8 As shown: At A, one end of the current testing plate 2008 is used to connect to the positive current line or the negative current line of the test equipment, and at D is the contact part between the pressure column body 20011 and the battery cell 6. The current is conducted to the positive and negative poles of the battery cell 6 through the current testing plate 2008 and the pressure column body 20011 to realize the test of the current performance of the battery cell 6; At B is the external connection end of the voltage monitoring probe 20014, and at E is the test end of the voltage monitoring probe 20014. The external connection end is used to connect to the positive voltage monitoring line or the negative voltage monitoring line of the test equipment, and the test end contacts the positive and negative poles of the battery cell 6 respectively to realize the test of the voltage performance of the battery cell 6; The free ends of the two external hoses 2014 form two external interfaces C1 and C2 for the inlet and outlet of the coolant of the battery cell 6; F is the contact port of the liquid-cooling pressure block 2004 and the battery cell liquid cooling channel 62, and the external hose 2014 is connected to the battery cell liquid cooling channel 62 through the connection port. During testing, the battery cell 6 is placed on the bracket 3, and the cylinder units 22 on both sides act relative to each other to press the two ends of the battery cell 6. The contact point D presses the battery cell under the action of the cylinder unit 22. The contact point E is an elastic contact point, specifically elastically pressed by the voltage monitoring probe 20014. The liquid cooling block 2004 at the contact port F elastically presses the battery cell liquid cooling channel 62. During performance testing, the internal cooling of the battery cell 6 is achieved through C1 and C2, which helps the battery cell 6 to cool down quickly and better fit the actual use environment of the battery cell 6, thereby helping to improve the authenticity, accuracy and precision of the test. In addition, the elastic and retractable contact points reduce the difficulty of operation when using the tooling and improve test efficiency. It also eliminates the strict requirements on the size of the battery cell to be tested, expands the scope of use of the utility model, and makes testing and use more flexible.
[0042] As a preferred technical solution, in another embodiment of the present invention, the outer surface of the liquid cooling block 2004 is further provided with a sealing rubber ring 2003 that matches the structure of the battery cell liquid cooling channel 62.
[0043] In this embodiment, the presence of the sealing rubber ring 2003 is mainly used to form a sealed cavity around the battery cell liquid cooling channel 62 of the battery cell 6 to prevent the coolant from leaking out during cooling, affecting the cooling effect, and making it impossible to truly restore the cooling state of the battery cell 6 in actual use.
[0044] As a preferred technical solution, in another embodiment of the present invention, a through hole is provided on the substrate 2002 corresponding to the explosion-proof valve 63 to ensure that the pressure relief of the battery cell is not affected.
[0045] As a preferred technical solution, another embodiment of the present invention is that two support columns 2011 are provided on the support frame cover 2012, and a spring 2009 is clamped on the support column 2011. The liquid-cooled pressure block 2004 is connected to the free ends of the two support columns 2011, and the liquid-cooled pressure block 2004 is elastically retractable under the action of the spring 2009.
[0046] In this embodiment, one end of the support column 2011 is fixedly connected to the support frame cover 2012 via a fixing ring 2015. The specific implementation method of the elastic retractability of the liquid-cooling pressing block 2004 is not limited. For example, the liquid-cooling pressing block 2004 may be slidably mounted on the support column 2011, a limiting ring is provided on the support column 2011, and a spring 2009 is mounted on the support column 2011 and located between the liquid-cooling pressing block 2004 and the limiting ring. Under the action of the spring 2009, the liquid-cooling pressing block 2004 elastically retracts along the support column 2011. Of course, other existing technologies that can achieve the elastic retractability of the liquid-cooling pressing block 2004 along the support column 2011 are also acceptable.
[0047] As a preferred technical solution, another embodiment of the present invention, the pressure column unit 2001 includes: a pressure column body 20011, an insulating block 20012, a fixed block 20013 and a voltage monitoring probe 20014, the pressure column body 20011 is provided with a mounting through hole along the axial direction, the insulating block 20012 is placed in the mounting through hole and a retaining spring is provided in the insulating block 20012, the fixed block 20013 is located above the insulating block 20012 and is threadedly connected to the mounting through hole, the voltage monitoring probe 20014 is installed on the pressure column body 20011 through the fixed block 20013 and can elastically move telescopically along the axial direction of the pressure column body 20011.
[0048] In this embodiment, the insulating block 20012 and the fixing block 20013 work together to insulate and elastically secure the voltage monitoring probe 20014 within the pressure column body 20011. During performance testing, the voltage monitoring probe 20014 exerts a certain amount of pressure on the positive and negative poles when in contact with them, ensuring sufficient contact and ensuring test results.
[0049] As a preferred technical solution, in another embodiment of the present utility model, a mounting hole is provided on the base plate 2002, and the cross section of the pressure column body 20011 is a T-shaped structure, wherein the T-shaped structure includes a horizontal portion and a vertical portion, wherein the horizontal portion is located outside the mounting hole, and the vertical portion passes through the mounting hole and is fixed to the base plate 2002.
[0050] As a preferred technical solution, in another embodiment of the present invention, the current testing plate 2008 is an L-shaped structure, one end of which is fixedly connected to the pressure column body 20011 and the other end of which is provided with a connection hole.
[0051] In this embodiment, one end of the L-shaped structure is sleeved on the outside of the part of the pressure column body 20011 that passes through the mounting hole and is fixed by a fixing nut 2007. The connection hole provided at the other end of the L-shaped structure is mainly for the positive and negative current lines of the external test equipment when performing current testing, so as to transmit the current to the pressure column body 20011 through the current testing board 2008, and then transmit it to the positive and negative poles through the pressure column body 20011.
[0052] As a preferred technical solution, in another embodiment of the present invention, the bracket 3 is a U-shaped structure, and notches 31 are formed in the middle of two side walls of the U-shaped structure.
[0053] In this embodiment, the setting of the notch 31 provides an operating space for taking and placing the battery cell 6, making it easy for the battery cell 6 to be placed in or removed from the bracket 3, and can save materials and reduce the weight of the test tooling.
[0054] As a preferred technical solution, in another embodiment of the present invention, a groove 11 is opened in the middle of the base plate 1, the bracket 3 is fixed in the groove 11, and the two cylinder assemblies 2 are respectively fixed on opposite sides of the groove 11.
[0055] In this embodiment, the recess 11 is configured so that the center of the base plate 1 is concave and the ends are relatively convex. The bracket 3 is fixed to the recess 11 in the center of the base plate 1 via fixing screws II5. The two cylinder units 22 are located on opposite sides of the bracket 3 and also within the recess 11. The ejection unit 20 and the bracket 21 are assembled with fixing screws IV24 and then fixed to the ends of the base plate 1 via fixing screws I4. This layout makes the overall structure of the utility model compact and stable, facilitates testing operations, and improves testing efficiency.
[0056] As a preferred technical solution, in another embodiment of the present invention, a lead-out hole for leading out the external hose 2014 is provided on the support frame cover 2012, and the free end of the external hose 2014 is led out through the lead-out hole to facilitate its connection with other structures.
[0057] Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and should not be construed as limiting the present invention. Those skilled in the art may modify, alter, replace, and distort the above embodiments within the scope of the present invention. Furthermore, those skilled in the art may combine and incorporate the different embodiments or examples described in this specification, as well as features of the different embodiments or examples, without conflicting with each other.
Claims
1. A performance test fixture for a battery cell with a liquid cooling channel, used for performing performance testing on a battery cell (6), wherein one end of the battery cell (6) is provided with a battery cell pole (61), a battery cell liquid cooling channel (62) and an explosion-proof valve (63), and characterized in that: include: A base plate (1), a bracket (3) and two cylinder assemblies (2), wherein the bracket (3) is arranged in the middle of the base plate (1), and the two cylinder assemblies (2) are respectively arranged on opposite sides of the bracket (3) and fixedly connected to the base plate (1); the cylinder assembly (2) comprises: a top block unit (20), a bracket (21) and a cylinder unit (22), wherein the top block unit (20) is fixedly connected to the cylinder unit (22) via the bracket (21); the top block unit (20) comprises a base plate (2002), a liquid cooling block (2004), a support frame (2005), a hose quick-connect plug ( 2006), a current test plate (2008), a support frame cover (2012) and an external hose (2014), the base plate (2002) is fixedly connected to the support frame cover (2012) through the support frame (2005), the liquid cooling block (2004) is elastically and telescopically connected to the support frame cover (2012), a through hole is provided on the liquid cooling block (2004), and the through hole is connected to the external hose (2014) through a hose quick-connect plug (2006), and long strip holes for the liquid cooling block (2004) to pass through are distributed on the base plate (2002); The device further comprises two pressure column units (2001), which are respectively arranged on two substrates (2002) or simultaneously arranged on the same substrate (2002). The pressure column unit (2001) comprises a conductive pressure column body (20011) and a voltage monitoring probe (20014) elastically fixed in the pressure column body (20011). The pressure column body (20011) is fixedly connected to the substrate (2002), and the current testing plate (2008) is in contact with the pressure column body (20011).
2. The performance testing tool according to claim 1, characterized in that: The outer surface of the liquid cooling pressing block (2004) is also provided with a sealing rubber ring (2003) that matches the structure of the battery cell liquid cooling channel (62).
3. The performance testing tool according to claim 1, characterized in that: A through hole is provided on the base plate (2002) corresponding to the explosion-proof valve (63).
4. The performance testing tool according to claim 1, characterized in that: Two support columns (2011) are provided on the support frame cover plate (2012), springs (2009) are clamped on the support columns (2011), and the liquid cooling pressing block (2004) is connected to the free ends of the two support columns (2011). The liquid cooling pressing block (2004) is elastically retractable under the action of the spring (2009).
5. The performance testing tool according to claim 1, characterized in that: The pressure column unit (2001) comprises: a pressure column body (20011), an insulating block (20012), a fixed block (20013) and a voltage monitoring probe (20014); the pressure column body (20011) is provided with a mounting through hole along the axial direction; the insulating block (20012) is placed in the mounting through hole and a retaining spring is provided in the insulating block (20012); the fixed block (20013) is located above the insulating block (20012) and is threadedly connected to the mounting through hole; the voltage monitoring probe (20014) is installed on the pressure column body (20011) through the fixed block (20013) and can elastically move in the axial direction of the pressure column body (20011).
6. The performance testing tool according to claim 5, characterized in that: A mounting hole is provided on the base plate (2002), and the cross section of the pressure column body (20011) is a T-shaped structure, wherein the T-shaped structure comprises a horizontal portion and a vertical portion, wherein the horizontal portion is located outside the mounting hole, and the vertical portion passes through the mounting hole and is fixed to the base plate (2002).
7. The performance testing tool according to claim 5, characterized in that: The current testing plate (2008) is an L-shaped structure, one end of which is fixedly connected to the pressure column body (20011), and the other end of which is provided with a connection hole.
8. The performance testing tool according to claim 1, characterized in that: The bracket (3) is a U-shaped structure, and notches (31) are formed in the middle of two side walls of the U-shaped structure.
9. The performance testing tool according to claim 1, characterized in that: A groove (11) is provided in the middle of the bottom plate (1), the bracket (3) is fixed in the groove (11), and the two cylinder assemblies (2) are respectively fixed on opposite sides of the groove (11).
10. The performance testing tool according to claim 1, characterized in that: The support frame cover plate (2012) is provided with an outlet hole for leading out an external hose (2014).