CN214040931U - Battery module testing arrangement - Google Patents
Battery module testing arrangement Download PDFInfo
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- CN214040931U CN214040931U CN202021811143.8U CN202021811143U CN214040931U CN 214040931 U CN214040931 U CN 214040931U CN 202021811143 U CN202021811143 U CN 202021811143U CN 214040931 U CN214040931 U CN 214040931U
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- force application
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- battery
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- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 125000006850 spacer group Chemical group 0.000 claims description 18
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000002579 anti-swelling effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a battery module testing arrangement belongs to battery test technical field, and battery module testing arrangement includes: the two end plates can be connected to the supporting structure through screws respectively; the force application assembly can replace at least one electric core of the electric core group and is arranged between two adjacent electric cores, can apply acting force to the electric core group and can detect the magnitude of the acting force in real time; and the distance measuring assembly is configured to measure the variation of the distance between the top ends of the two end plates in real time. Through the variable quantity of distance between two end plate tops of ranging subassembly real-time measurement, obtain the holistic deflection of battery module, combine the effort that detects, can obtain the relation picture of the holistic bulging force of battery module and the holistic deflection of battery module, realize the holistic bulging force test of battery module, can guide the design and the lectotype of end plate and screw rod of battery module with this.
Description
Technical Field
The utility model relates to a battery test technical field especially relates to a battery module testing arrangement.
Background
Lithium ion batteries are increasingly widely used in the fields of consumer electronics, aerospace, energy storage, new energy vehicles and the like due to the characteristics of high energy density, high working voltage, low self-discharge, high charging efficiency, long cycle life, no memory effect and the like.
In the production process of lithium ion batteries, the test of the anti-swelling strength of a battery module comprising one or more cells during a charging cycle is very important, and can be used as a key factor for evaluating the safety of the cell or the battery module structure. The battery module includes the outer frame that electric core group and end plate and screw rod are constituteed, the expansion of electric core group at the charge-discharge in-process must be influenced the outer frame of battery module, the expansion of electric core group also must receive outer frame's restriction, however, at present, to the test of battery module many to be that the electric core group in the battery module is at the bulging force test of circulation charge-discharge in-process, can't reflect the bulging force condition of whole battery module, be unfavorable for the lectotype and the design of end plate and screw rod.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a battery module testing arrangement to the realization is whole at the expansive force test of electric core group to the battery module, and with this lectotype and the design of guiding end plate and screw rod.
As the conception, the utility model adopts the technical proposal that:
the utility model provides a testing arrangement of battery module, battery module include electric core group with set up respectively in two end plates at electric core group both ends, battery module testing arrangement includes:
the two end plates can be connected to the supporting structure through screws respectively;
the force application assembly can replace at least one battery cell of the battery cell group and be arranged between two adjacent battery cells, and the force application assembly is configured to apply acting force to the battery cell group and detect the magnitude of the acting force in real time;
a ranging assembly configured to measure a variation in a distance between two of the end plate tips in real time.
Further, the force application assembly comprises a force application structure and a pressure sensor, one side of the force application structure can be abutted to one of the two adjacent battery cores, the other side of the force application structure can be abutted to the pressure sensor, and the pressure sensor can be abutted to the other battery core.
Further, the force application structure is an air cylinder or a hydraulic cylinder, and a piston rod of the air cylinder or the hydraulic cylinder abuts against the pressure sensor.
Further, the force application assembly further comprises a supporting piece, and the supporting piece is provided with a limiting groove used for supporting and limiting the force application structure and the pressure sensor.
Further, the force application assembly further comprises a spacer, when the force application assembly is located between two adjacent electric cores, the spacer is arranged between the force application structure and the corresponding electric core and between the pressure sensor and the corresponding electric core, and the support piece is abutted to the two spacers.
Further, bearing structure includes the base, the interval is provided with two archs on the base, two it is used for supporting and spacing to form between the arch the spacing groove of electric core group, two the end plate can pass through respectively the screw rod is connected in two the arch.
Further, when the force application assembly is located between two adjacent battery cells, the number of the battery cells on two sides of the force application assembly is the same.
Further, the range finding subassembly includes two range finding structures, two the range finding structure is located respectively the both sides of battery module, the range finding structure be configured into real-time measurement and correspond the distance between the top of end plate.
Further, the distance measuring structure is an electro-optical distance measuring instrument.
Further, the distance between each of the two distance measuring structures and the corresponding end plate is the same.
The utility model has the advantages that:
the utility model provides a battery module testing device, through setting up base, application of force subassembly and range finding subassembly, application of force subassembly can replace at least one electric core of electric core group to can exert the effort to electric core group and simulate the expansion process of electric core group, and measure the expansive force; through the variable quantity of distance between two end plate tops of ranging subassembly real-time measurement, obtain the holistic deflection of battery module, finally can obtain the relation picture of the holistic bulging force of battery module and the holistic deflection of battery module, realize the holistic bulging force test of battery module to can guide the design and the lectotype of the end plate of battery module and screw rod with this.
Drawings
Fig. 1 is a schematic view of a working state of a testing device provided by the present invention;
fig. 2 is a schematic view of a working state of the testing device provided by the present invention;
fig. 3 is a schematic structural diagram of the testing apparatus provided by the present invention.
In the figure:
1. a base; 11. a protrusion; 111. a limiting groove; 2. a battery module; 21. the electric core group; 211. an electric core; 22. an end plate; 23. binding a belt; 24. an insulating pad; 3. a force application assembly; 31. a force application structure; 32. a pressure sensor; 33. a support member; 331. a limiting groove; 34. a spacer; 4. a ranging assembly; 41. a ranging structure; 42. and (5) installing a rod.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
This embodiment provides a battery module testing arrangement, and battery module 2 to specifically be square battery module, as shown in fig. 1, battery module 2 includes electric core group 21, sets up respectively in two end plates 22 at electric core group 21 both ends and around the ribbon 23 of end plate 22 and electric core group 21 setting or all connect in two end plates and two curb plates of relative setting. In the present embodiment, the battery cell module 2 includes the tie 23 as an example. In addition, it should be noted that the battery core pack 21 includes a plurality of battery cells 211, and the plurality of battery cells 211 are arranged side by side along the thickness direction of the battery cells 211. The two end plates 22 and the binding band 23 are used for preliminary fixing of the electric core group 21, wherein the binding band 23 can be provided with a plurality of binding bands, in the embodiment, the binding band 23 is specifically provided with two binding bands, and of course, in other embodiments, the binding band 23 can also be provided with three or more binding bands. Further, the battery module 2 further includes an insulating pad 24, and an insulating pad 24 is disposed between the electric core pack 21 and each of the end plates 22.
As shown in fig. 1 to 3, the battery module testing apparatus includes a support structure, a force application assembly 3, and a distance measurement assembly 4. Wherein the two end plates 22 of the battery module 2 can be connected to the support structure by screws, respectively. The force application assembly 3 can replace at least one electric core of the electric core group 21 and be arranged between two adjacent electric cores 211, and is used for applying an acting force to the electric core group 21 and detecting the magnitude of the acting force in real time. Preferably, when the force application assembly 3 is located between two adjacent battery cells 211, the number of the battery cells 211 on both sides of the force application assembly 3 is the same. The distance measuring assembly 4 is used to measure the amount of change in the distance between the tips of the two end plates 22 in real time.
It should be noted that, in the actual working process of the battery module 2, the end plate 22 of the battery module 2 is fixed on the supporting structure through the screw, and in the cyclic charge and discharge process of the battery module 2, the deformation of the top end of the end plate 22 of the battery module 2 relative to the bottom end thereof is large, so that the deformation of the whole battery module 2 in the charge and discharge cycle process is represented by measuring the change of the distance from the top end of the corresponding end plate 22 through the distance measuring structure 41. The "top end" of end panel 22 herein refers to a location on end panel 22 that is approximately near the height at which its top surface is located.
Specifically, in this embodiment, the supporting structure includes base 1, and the interval is provided with two archs 11 on base 1, forms between two archs 11 to be used for supporting and spacing groove 111 to electric core group 21, and two end plates 22 can connect in two archs 11 through the screw rod respectively, and two archs 11 all are located between two range finding structures 41. The installation state of the battery module 2 in practice is simulated through the supporting structure, and the accuracy of the cycle life test and the expansive force test of the battery module 2 is improved.
As shown in fig. 2 and 3, the force application assembly 3 includes a force application structure 31 and a pressure sensor 32. When the force application assembly 3 is located between two adjacent battery cells 211, one side of the force application structure 31 can abut against one battery cell 211 of the two adjacent battery cells 211, the other side can abut against the pressure sensor 32, and the pressure sensor 32 can abut against the other battery cell 211. In this embodiment, the force application structure 31 may be a cylinder or a hydraulic cylinder, and a piston rod of the cylinder or the hydraulic cylinder abuts against the pressure sensor 32. The piston rod applies acting force to the electric core group 21 so as to simulate the expansion force of the electric core group 21, and the magnitude of the acting force can be measured in real time through the pressure sensor 32.
Further, the force application assembly 3 further includes a support member 33 and a spacer 34, and the support member 33 is provided with a limit groove 331 for supporting and limiting the force application structure 31 and the pressure sensor 32. When the force application assembly 3 is located between two adjacent battery cells 211, the spacers 34 are respectively arranged between one side of the force application structure 31 departing from the pressure sensor 32 and the corresponding battery cell 211 and between one side of the force application structure 31 departing from the pressure sensor 32 and the corresponding battery cell 211, and the support member 33 abuts against the two spacers 34.
It can be understood that when the force application assembly 3 is located between two adjacent battery cells 211, the support 33 is used to support the force application structure 31 and the pressure sensor 32, wherein one spacer 34 is located between the force application structure 31 and the battery cell 211 on the corresponding side, and the other spacer 34 is located between the pressure sensor 32 and the battery cell 211 on the corresponding side, and the applied force of the force application structure 31 is transmitted to the battery cells 211 on both sides through the pressure sensor 32 and the two spacers 34. Through the support of support piece 33 for application of force structure 31 can exert the effort to the central part of electric core 211, and rethread spacer 34 is favorable to making effort evenly distributed, avoids certain position atress of electric core 211 to concentrate and influences the test result.
As shown in fig. 3, the distance measuring assembly 4 includes two distance measuring structures 41, the two distance measuring structures 41 are arranged at intervals along the arrangement direction of the plurality of electric cores of the electric core assembly 21, the two distance measuring structures 41 are respectively located at two sides of the battery module 2, and the distance measuring structures 41 can measure the distance between the top ends of the corresponding end plates 22 in real time. In this embodiment, the distance measuring structure 41 is a photoelectric distance meter, and more preferably, the distance measuring structure 41 is a laser distance meter, which has high precision and can improve the measuring result.
Further, the distance measuring assembly 4 further comprises two mounting rods 42, the two distance measuring structures 41 are respectively mounted on the two mounting rods 42, and the height of the distance measuring structure 41 is raised to match the top end of the corresponding end plate 22 through the mounting rods 42. Alternatively, the mounting rod 42 may be a telescopic structure, or the mounting rod 42 may have a plurality of mounting positions in the vertical direction, at which the distance measuring structure 41 can be mounted, so that the battery module measuring device can be adapted to the measurement of the battery modules 2 of different heights.
Further, in the present embodiment, the distance between each of the two distance measuring structures 41 and the corresponding protrusion 11 is the same. That is, the initial distance between each of the two ranging structures 41 and the top of the corresponding end plate 22 is the same.
The operation of the battery module testing apparatus will be described in detail below.
In the embodiment, the example that the electric core assembly 21 includes twelve electric cells 211 is taken as an example for description, and of course, in other embodiments, the number of the electric cells 211 included in the electric core assembly 21 may be set according to actual needs. The biasing structure 31 will be described by taking a cylinder as an example.
Step 1, measuring the relation between the cycle number of the battery module 2 and the overall deformation of the battery module 2.
As shown in FIG. 1, two end plates 22 of the battery module 2 are respectively mounted on two protrusions 11 through screws, the electric core assembly 21 is located in the limiting groove 111, the initial distance between each distance measuring structure 41 and the top end of the corresponding end plate 22 is the same and is L1, then the electric core assembly 21 is circularly charged and discharged, and the number M of cycles (M is more than or equal to 1) and the real-time distance between each distance measuring structure 41 and the top end of the corresponding end plate 22 are recorded in real time, which is assumed to be L2MAnd L3MIn this case, the relationship between the number of cycles of the battery module 2 and the deformation amount of the entire battery module 2 can be obtained. For example, M isIn case 2, the number of cycles of the battery module 2 is 2, and the deformation amount of the corresponding battery module 2 as a whole is ((L1-L2)2)+(L1-L32) And M is 3, the number of cycles of the battery module 2 is 3, and the deformation amount of the entire corresponding battery module 2 at this time is ((L1-L2)3)+(L1-L33))。
And 2, measuring the relation between the overall expansion force of the battery module 2 and the overall deformation of the battery module 2.
As shown in fig. 2, the four battery cells 211 of the battery pack 21 are taken out, at this time, the remaining battery cells of the battery pack 21 are divided into two battery cell groups, the force application assembly 3 is placed between the two battery cell groups, the two spacers 34 are respectively abutted against the two battery cell groups, the support member 33 is abutted between the two spacers 34, the air cylinder and the pressure sensor 32 are both placed in the limiting groove 331 of the support member 33, the air cylinder body is abutted against one of the spacers 34, the air cylinder rod is abutted against the pressure sensor 32, and the pressure sensor 32 is abutted against the other spacer 34. It should be noted that, at this time, the two battery cell groups respectively abut against the two protrusions 11. Subsequently, acting force F is applied to the two battery cells in groups through the air cylinder, so that the expansion process of the battery cell group 21 is simulated, the acting force is measured in real time through the pressure sensor 32, the real-time distance between the two distance measuring structures 41 and the top end of the corresponding end plate 22 is measured respectively, and the relation between the overall expansion force of the battery module 2 and the overall deformation of the battery module 2 is obtained through calculation. The calculation of the deformation of the entire battery module 2 is the same as the calculation method in step 1, and is not described herein again.
The relationship between the number of cycles of the battery module 2 and the expansion force of the entire battery module 2 can be finally obtained from the relationship between the number of cycles of the battery module 2 and the deformation amount of the entire battery module 2 and the relationship between the expansion force of the entire battery module 2 and the deformation amount of the entire battery module 2. The design of the entire battery module 2 is guided based on the relationship between the number of cycles of the battery module 2 and the expansion force of the entire battery module 2.
Through this battery module testing arrangement, just can realize the test of cycle life and expansibility relation through a battery module 2, avoid the waste of test resource, reduce the test cost. But also can be applicable to the measurement of the battery module 2 that has installed in the battery package, only need at this moment to measure the holistic bulging force of battery module 2 and the holistic deflection relational graph of battery module 2 can, combine the battery management system's of battery package measured the relation graph of the number of cycles of battery module 2 and the holistic deflection of battery module 2, can obtain the number of cycles of battery module 2 and the holistic bulging force relational graph of battery module 2.
In summary, the embodiment provides the battery module testing apparatus, by providing the base 1, the force application component 3 and the distance measurement component 4, the force application component 3 can replace at least one electric core 211 of the electric core assembly 21, and can apply an acting force to the electric core assembly 21 to simulate the expansion process of the electric core assembly 21, and measure the expansion force; the distance between the tops of the corresponding end plates 22 is measured through the two distance measuring structures 41, the overall deformation of the battery module 2 is obtained, the relationship graph of the overall expansion force of the battery module 2 and the overall deformation of the battery module 2 can be finally obtained, the overall expansion force of the battery module 2 is tested, the strength and the rigidity of the end plates 22, the screw rods and the bands 23 (side plates) can be reflected, and the design and the type selection of the end plates 22, the bands 23 (side plates) and the screw rods of the battery module 2 can be guided.
In addition, when the electric core group 21 is complete, can also measure the whole deformation quantity of battery module 2 in the circulation charge-discharge process through base 1 and range finding subassembly 4, obtain the relation picture of battery module 2 cycle number and the whole deformation quantity of battery module 2, combine the relation picture of the whole bulging force of above-mentioned battery module 2 and the whole deformation quantity of battery module 2, can arrive the relation picture of battery module 2 cycle number and the whole bulging force of battery module 2 to this guides the overall design of battery module 2.
The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a battery module testing arrangement, battery module (2) include electric core group (21) and set up respectively in two end plates (22) at electric core group (21) both ends, its characterized in that, battery module testing arrangement includes:
a support structure to which the two end plates (22) can be respectively connected by screws;
the force application assembly (3) can be arranged between two adjacent electric cores (211) instead of at least one electric core (211) of the electric core group (21), and the force application assembly (3) is configured to be capable of applying acting force to the electric core group (21) and detecting the magnitude of the acting force in real time;
a distance measuring assembly (4) configured to measure in real time the amount of change in the distance between the tips of the two end plates (22).
2. The battery module testing device according to claim 1, wherein the force application assembly (3) comprises a force application structure (31) and a pressure sensor (32), one side of the force application structure (31) can abut against one of the battery cells (211) in two adjacent battery cells (211), the other side of the force application structure can abut against the pressure sensor (32), and the pressure sensor (32) can abut against the other battery cell (211).
3. The battery module testing device according to claim 2, wherein the force application structure (31) is a cylinder or a hydraulic cylinder, and a piston rod of the cylinder or the hydraulic cylinder abuts against the pressure sensor (32).
4. The battery module testing device according to claim 2, wherein the force application assembly (3) further comprises a support member (33), and the support member (33) is provided with a limiting groove (331) for supporting and limiting the force application structure (31) and the pressure sensor (32).
5. The battery module testing device according to claim 4, wherein the force application assembly (3) further comprises spacers (34), when the force application assembly (3) is located between two adjacent battery cells (211), the spacers (34) are respectively arranged between the force application structure (31) and the corresponding battery cell (211) and between the pressure sensor (32) and the corresponding battery cell (211), and the support member (33) abuts against the two spacers (34).
6. The battery module testing device according to claim 1, wherein the supporting structure comprises a base (1), two protrusions (11) are arranged on the base (1) at intervals, a limiting groove (111) for supporting and limiting the electric core group (21) is formed between the two protrusions (11), and the two end plates (22) can be connected to the two protrusions (11) through the screws respectively.
7. The battery module testing device according to claim 1, wherein when the force application assembly (3) is located between two adjacent battery cells (211), the number of the battery cells (211) on both sides of the force application assembly (3) is the same.
8. The battery module testing device according to claim 1, wherein the distance measuring assembly (4) comprises two distance measuring structures (41), the two distance measuring structures (41) are respectively located at two sides of the battery module (2), and the distance measuring structures (41) are configured to measure the distance between the top ends of the corresponding end plates (22) in real time.
9. The battery module testing device according to claim 8, wherein the distance measuring structure (41) is an electro-optical distance meter.
10. The battery module testing device according to claim 8, wherein the distance between each of the two distance measuring structures (41) and the corresponding end plate (22) is the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021811143.8U CN214040931U (en) | 2020-08-26 | 2020-08-26 | Battery module testing arrangement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021811143.8U CN214040931U (en) | 2020-08-26 | 2020-08-26 | Battery module testing arrangement |
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| CN214040931U true CN214040931U (en) | 2021-08-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999664A (en) * | 2020-08-26 | 2020-11-27 | 湖北亿纬动力有限公司 | Battery module testing method and device |
| CN115436823A (en) * | 2022-10-10 | 2022-12-06 | 深圳市卓讯达科技发展有限公司 | Battery cell testing method and testing equipment |
-
2020
- 2020-08-26 CN CN202021811143.8U patent/CN214040931U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999664A (en) * | 2020-08-26 | 2020-11-27 | 湖北亿纬动力有限公司 | Battery module testing method and device |
| CN111999664B (en) * | 2020-08-26 | 2024-01-02 | 湖北亿纬动力有限公司 | Battery module testing method and device |
| CN115436823A (en) * | 2022-10-10 | 2022-12-06 | 深圳市卓讯达科技发展有限公司 | Battery cell testing method and testing equipment |
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