A restraint and compartmentalization device
By designing a constraint-based capacity testing device, the structure of the tray and cover, along with the hydrostatic pressure of the liquid, is used to transfer the constraint force, thus solving the problems of deformation and heat generation of the battery cells during capacity testing. This achieves uniform constraint and efficient cooling of the battery cells, improving testing efficiency and the yield of the coating process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUNWODA MOBILITY ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-07-10
AI Technical Summary
In the existing constrained formation process, the battery cells are prone to deformation and appearance damage after capacity testing, and there is a heat generation problem during capacity charging, which the existing constrained trays cannot effectively solve.
A restraint and separation device is designed, including a tray, a cover and a probe assembly. The tray has a liquid inlet, a liquid outlet and a receiving cavity. The cover seals the receiving cavity and has a through hole. The probe assembly is connected to the cell electrode through the through hole. The liquid transmits restraint force under static pressure in the receiving cavity to achieve uniform restraint and cools the cell through the liquid.
It prevents deformation and appearance damage of the battery cells after capacity testing, and solves the heat generation problem during capacity charging through liquid cooling, thereby improving testing efficiency and the yield of subsequent coating processes.
Smart Images
Figure CN224481084U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of batteries, and in particular to a restraint capacity-dividing device. Background Technology
[0002] Current constraint formation processes typically apply constraint forces to the battery using specially designed mechanical constraint trays, usually only applying constraint forces to two large surfaces of the cell. This uneven force often leads to cell deformation after capacity grading. Furthermore, the mechanical clamping action generates metal-to-metal friction during movement, severely impacting battery safety and surface appearance. Moreover, existing constraint trays are incapable of addressing the cell heating issue during capacity grading and charging. Utility Model Content
[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. It provides a constraint-based capacity-balancing device to prevent deformation and cosmetic damage to the battery cell after capacity-balancing testing, while also cooling the battery cell during capacity-balancing charging.
[0004] To achieve the above objectives, this utility model provides a restraint and capacity-separating device, having a third orientation, the restraint and capacity-separating device comprising:
[0005] The tray is provided with a liquid inlet, a liquid outlet, a placement port, and a receiving cavity for containing liquid and battery cells. The placement port is located on one side of the tray along the third direction. The liquid inlet, the liquid outlet, and the placement port are spaced apart from each other and are all connected to the receiving cavity.
[0006] A cover body, which is placed over the placement opening and sealed to the tray; the cover body has a first through hole extending along the third direction;
[0007] A probe assembly is inserted through the first through hole; the probe assembly is used to contact the battery cell.
[0008] As a preferred embodiment, the tray includes a tray body and a partition. The inlet, the outlet, the placement port, and the receiving cavity are all disposed in the tray body. The partition is located in the receiving cavity and divides the receiving cavity into multiple sub-receiving cavities. The partition is provided with a connecting hole. Two adjacent sub-receiving cavities of the same partition are connected through the connecting hole, and at least one sub-receiving cavity is connected to the inlet and / or the outlet.
[0009] As a preferred embodiment, it also has a first direction and a second direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other;
[0010] The partition includes a first partition and a second partition. The first partition extends along the first direction, and the second partition extends along the second direction. The first partition and the second partition intersect and divide the receiving cavity into a plurality of the sub-receiving cavities. The connecting hole is formed in the first partition and / or the second partition.
[0011] As a preferred embodiment, the disc body is provided with an outlet and an inlet at both ends in the second direction, and the outlet and inlet at the same end of the disc body in the second direction are connected. Multiple first partitions are provided, spaced apart along the second direction, and the connecting hole is formed in one of the first partitions; or
[0012] The disc body has an outlet and an inlet at both ends in the second direction, and the inlet and outlet are connected. Multiple first partitions are provided, and the multiple first partitions are spaced apart along the second direction. The connecting hole is opened in the first partition.
[0013] As a preferred embodiment, the cover has multiple sealing cavities with openings facing the disc body, the first through hole communicates with the sealing cavity, and the sealing cavity and the sub-accommodating cavity are arranged in a one-to-one correspondence along the third direction; the inner wall of the sealing cavity is connected with a sealing ring, which is used to seal and cooperate with the battery cell and isolate the first through hole from the sub-accommodating cavity.
[0014] As a preferred embodiment, the sealing ring includes a first sealing ring and a second sealing ring; both the first sealing ring and the second sealing ring are connected to the inner wall of the sealing cavity;
[0015] The battery cell has a top wall perpendicular to the third direction and a side wall parallel to the third direction. The first sealing ring is used to seal against the side wall, and the second sealing ring is used to abut against the top wall.
[0016] As a preferred embodiment, the cover is provided with a second through hole, which is spaced apart from the first through hole. The second through hole communicates with the sealing cavity and is configured to be opposite to the explosion-proof port of the battery cell.
[0017] As a preferred embodiment, the tray further includes a protective layer connected to the sub-receiving cavity.
[0018] As a preferred embodiment, the sub-receiving cavity has a peripheral side surface surrounding the third direction, and the protective layer is disposed around the peripheral side surface of the sub-receiving cavity.
[0019] As a preferred embodiment, the cover is provided with an elastic compensation part on the side facing the tray and / or the tray is provided with an elastic compensation part, and the cover and the tray are connected by an interference fit through the elastic compensation part.
[0020] Compared with the prior art, the present invention provides a constraint capacity testing device with the following advantages: the probe assembly is connected to the electrode of the battery cell through a first through hole in the cover to perform constraint capacity testing. The cover and tray have a placement opening and a receiving cavity. The cover seals the placement opening and the receiving cavity. The receiving cavity can accommodate the battery cell used for constraint capacity testing and the liquid used to apply static pressure to the battery cell. Other areas of the tray have liquid inlets and outlets that are respectively connected to the receiving cavity to realize the injection and discharge of liquid in the receiving cavity. After the liquid is injected into the receiving cavity, the battery cell is at least partially immersed in the liquid and surrounded by the liquid. Then, the constraint force is transmitted to the battery casing through the static pressure of the liquid, making the overall effect of the battery cell more uniform. At the same time, the liquid can quickly cool the heat generated by the battery cell during the capacity testing process. Furthermore, the static pressure liquid does not directly rub against the battery casing and has a certain cleaning effect, which helps to improve the yield of the subsequent coating process. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall disassembled structure of an embodiment of this utility model.
[0022] Figure 2 This is a schematic diagram of the structure of the cover body in an embodiment of this utility model.
[0023] Figure 3 This is a top view of the cover of an embodiment of this utility model.
[0024] Figure 4 This is a utility model Figure 3 The cross-sectional view at point AA.
[0025] Figure 5 This is a utility model Figure 3 A magnified structural diagram at point C.
[0026] Figure 6 This is a schematic diagram of the structure of the tray according to an embodiment of the present invention.
[0027] Figure 7 This is a schematic diagram of the structure of the liquid flow controlled by the multiple rows of sub-cavities in an embodiment of this utility model.
[0028] Figure 8 This is a schematic diagram of the liquid flow structure in the multi-row sub-accommodating cavities of this utility model embodiment.
[0029] Figure 9 This is a top view of the tray according to an embodiment of the present invention.
[0030] Figure 10 This is a utility model Figure 9 The cross-sectional view at point BB.
[0031] In the picture:
[0032] 1. Probe assembly;
[0033] 2. Cover body; 21. First through hole; 22. Second through hole; 23. Sealing ring; 231. First sealing ring; 232. Second sealing ring; 24. Sealing cavity;
[0034] 3. Tray; 31. Tray body; 32. Divider; 321. First divider; 322. Second divider; 323. Connecting hole; 33. Protective layer; 34. Liquid inlet; 35. Liquid outlet; 36. Receiving cavity; 362. Sub-receiving cavity; 3621. Peripheral side; 37. Elastic compensation part; 38. Placement opening;
[0035] 4. Battery cell; 41. Electrode; 42. Explosion-proof port; 43. Top wall; 44. Side wall;
[0036] X, first direction; Y, second direction; Z, third direction. Detailed Implementation
[0037] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0038] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0041] In the embodiments of the application, "parallel" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is -1° to 1°. "Perpendicular" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is 89° to 91°. Equal distances, equal angles, or equal areas refer to a state in which the tolerance range is -1% to 1%.
[0042] like Figures 1 to 10 As shown, a preferred embodiment of the present invention provides a restraint and capacity-separating device having two mutually perpendicular directions X, Y, and Z. The restraint and capacity-separating device includes:
[0043] The tray 3 is provided with a liquid inlet 34, a liquid outlet 35, a placement port 38, and a receiving cavity 36 for containing liquid and battery cell 4. The placement port 38 is located on one side of the tray 3 along the third direction Z. The liquid inlet 34, the liquid outlet 35 and the placement port 38 are arranged alternately and are all connected to the receiving cavity 36.
[0044] Cover 2, which covers the placement opening 38 and is sealed to the tray 3; cover 2 is provided with a first through hole 21 extending in the third direction Z;
[0045] The probe assembly 1 is inserted through the first through hole 21; the probe assembly 1 is used to contact the battery cell 4.
[0046] This invention discloses a constraint capacity testing device. A probe assembly 1 connects to the electrode 41 of a battery cell 4 through a first through-hole 21 in a cover 2 for constraint capacity testing. The cover 2 and tray 3 have a placement opening 38 and a receiving cavity 36. The cover 2 seals the placement opening 38 and the receiving cavity 36. The receiving cavity 36 can accommodate the battery cell 4 used for constraint capacity testing and the liquid used to apply static pressure to the battery cell 4. Other areas of the tray 3 have inlet ports 34 and outlet ports 35, respectively connected to the receiving cavity 36, to allow for the injection and discharge of liquid within the receiving cavity 36. After the liquid is injected into the receiving cavity 36, the battery cell 4 is at least partially immersed in and surrounded by the liquid. The static pressure of the liquid then transmits the constraint force to the battery casing, resulting in a more uniform and consistent overall effect of the battery cell 4. Simultaneously, the liquid can rapidly cool the heat generated by the battery cell 4 during the capacity testing process. Furthermore, the static pressure liquid does not directly rub against the battery casing and has a certain cleaning effect, which helps improve the yield of subsequent coating processes.
[0047] Furthermore, such as Figure 6 As shown, the tray 3 includes a tray body 31 and a partition 32. An inlet 34, an outlet 35, a placement port 38, and a receiving cavity 36 are all located on the tray body 31. The partition 32 is located within the receiving cavity 36 and divides the receiving cavity 36 into multiple sub-receiving cavities 362. The partition 32 has a connecting hole 323. Two adjacent sub-receiving cavities 362 on the same partition 32 are connected through the connecting hole 323, and at least one sub-receiving cavity 362 is connected to the inlet 34 and / or the outlet 35. The partition 32 is connected to the inner wall of the receiving cavity 36 of the tray body 31, and the partition 32 divides the receiving cavity 36 into multiple sub-receiving cavities 362. Adjacent sub-receiving cavities 362 are connected through the connecting hole 323. Each sub-receiving cavity 362 can hold one battery cell 4. Multiple sub-receiving cavities 362 can simultaneously perform constraint capacity testing on multiple battery cells 4, improving testing efficiency. At least one of the sub-receptacle 362 is connected to the inlet 34 and at least one of the sub-receptacle 362 is connected to the outlet 35. The liquid used for the restraint volume test is injected from the inlet 34 and discharged through the outlet 35.
[0048] The position and number of the liquid inlet 34 and the liquid outlet 35 can be adjusted according to the actual situation. For example, the liquid inlet 34 and the liquid outlet 35 can be set on the periphery of the same sub-accommodating cavity 362, which is then connected to other sub-accommodating cavities 362 through the connecting hole 323. Alternatively, the liquid inlet 34 can be set in a sub-accommodating cavity 362 on one side, and the liquid outlet 35 can be set in a sub-accommodating cavity 362 on the opposite side. The two sub-accommodating cavities 362 are connected to other sub-accommodating cavities 362, which can realize the flow of liquid and thus enable the liquid to quickly cool the heat generated by the battery cell 4 during the capacity test.
[0049] Furthermore, such as Figures 7 to 9As shown, the partition 32 includes a first partition 321 and a second partition 322. The first partition 321 extends along a first direction X, and the second partition 322 extends along a second direction Y. The first partition 321 and the second partition 322 intersect and divide the receiving cavity 36 into multiple sub-receiving cavities 362. A connecting hole 323 is formed in the first partition 321 and / or the second partition 322. The first partition 321 extends along the first direction X, and the second partition 322 extends along the second direction Y. Thus, the first partition 321 and the second partition 322 intersect within the receiving cavity 36 to form multiple sub-receiving cavities 362, which can simultaneously accommodate multiple battery cells 4 for constraint capacity testing. Furthermore, the battery cells 4 are positioned regularly, making placement and operation easier.
[0050] Furthermore, the disc body 31 is provided with an outlet 35 and an inlet 34 at both ends in the second direction Y. The outlet 35 and the inlet 34 at the same end of the disc body 31 in the second direction Y are connected. Multiple first partitions 321 are provided, and multiple first partitions 321 are spaced apart along the second direction Y. A connecting hole 323 is opened in the first partition 321.
[0051] Alternatively, the plate 31 may have an outlet 35 and an inlet 34 at both ends in the second direction Y, with the inlet 34 communicating with the outlet 35. Multiple first partitions 321 are provided, spaced apart along the second direction Y, with connecting holes 323 formed in each partition 321. By positioning the outlets 35 and inlets 34 at different locations on the plate, different liquid flow channels can be formed to meet different cooling requirements.
[0052] As one embodiment, such as Figures 1 to 10 As shown, the receiving cavity 36 is divided into multiple sub-receiving cavities 362 by multiple first partitions 321 intersecting with a second partition 322. The multiple sub-receiving cavities 362 arranged sequentially along the second direction Y form a sub-receiving cavity row, and the multiple sub-receiving cavity rows are arranged along the first direction X. Figure 7 In the same sub-receptacle row, the liquid inlet 34 is located in a sub-receptacle 362 at one end of the sub-receptacle row along the second direction Y, and the liquid outlet 35 is located in a sub-receptacle 362 at the other end of the sub-receptacle row along the second direction Y. There are multiple sub-receptacle 362 between the two sub-receptacle 362, which are separated by a first partition 321. Therefore, a connecting hole is provided on the first partition 321 to connect them. Adjacent sub-receptacle rows are also configured in the same way, so that the liquid in each sub-receptacle row can be injected and discharged independently.
[0053] Of course, as another embodiment, such as Figure 8As shown, the inlet 34 and outlet 35 of adjacent sub-receiving cavity rows can also be arranged in opposite directions. That is, the disc body 31 has both an inlet 34 and an outlet 35 at one end in the second direction Y, and the inlet 34 and outlet 35 belong to adjacent sub-receiving cavity rows, which are connected by pipes. For example, the two ends arranged opposite each other in the second direction Y are the first end and the second end. Liquid enters from the sub-receiving cavity 362 located at the first end of the first sub-receiving cavity row, exits from the sub-receiving cavity 362 located at the second end of the first sub-receiving cavity row, flows through the pipe into the sub-receiving cavity 362 located at the second end of the second sub-receiving cavity row, and then exits from the sub-receiving cavity 362 located at the first end of the second sub-receiving cavity row, and so on.
[0054] This configuration allows liquid to flow between the sub-cavities 362 through the connecting holes 323, filling each sub-cavity 362 with liquid. The inlet 34 and outlet 35 at the same end in the second direction Y are connected by a pipe, thereby enabling liquid flow between two adjacent sub-cavities in the first direction X, further improving the cooling effect.
[0055] Furthermore, such as Figure 2 As shown, the cover 2 has multiple sealing cavities 24 with openings facing the disc 31. The first through hole 21 communicates with the sealing cavity 24, and the sealing cavity 24 and the sub-accommodating cavity 362 are arranged one-to-one along the third direction Z. A sealing ring 23 is connected to the inner wall of the sealing cavity 24. The sealing ring 23 is used to seal and cooperate with the battery cell 4 and isolate the first through hole 21 from the sub-accommodating cavity 362. The capacity test of the battery cell 4 usually includes a charging or discharging process. The positive and negative electrodes 41 of the battery cell 4 are often located at the top. The probe assembly 1 passes through the first through hole 21 and is connected to the electrode of the battery cell 4, and is used to detect relevant electrical signal data. During the test, since the battery cell 4 is energized, and the sub-accommodating cavity 362 is filled with liquid, the probe assembly 1 and the liquid need to be isolated in the sub-accommodating cavity 362 to prevent short circuit. Therefore, the sealing ring 23 is sealed to the outer peripheral surface of the battery cell 4, so that the first through hole 21 is isolated from the sub-accommodating cavity 362, avoiding contact between the test liquid and the energized part of the battery cell 4, and ensuring test safety. Meanwhile, the explosion-proof port 42 of the battery cell 4 is usually located at the same end as the positive and negative electrodes 41. After the sealing ring 23 is sealed and connected to the outer peripheral surface of the battery cell 4, it can also isolate the liquid from the explosion-proof port 42, so as to avoid the liquid interfering with the start-up of the explosion-proof port 42.
[0056] As one embodiment, such as Figure 2 As shown, the sealing ring 23 is made of soft rubber material, which allows the sealing ring 23 to fit well against the outer peripheral surface of the battery cell 4 for sealing.
[0057] Furthermore, such as Figures 1 to 4 As shown, the sealing ring 23 includes a first sealing ring 231 and a second sealing ring 232; both the first sealing ring 231 and the second sealing ring 232 are connected to the inner wall of the sealing cavity 24.
[0058] The battery cell 4 has a top wall 43 perpendicular to the third direction Z and a side wall 44 parallel to the third direction Z. A first sealing ring 231 is used to seal against the side wall 44, and a second sealing ring 232 is used to abut against the top wall 43. The first sealing ring 231 abuts against the side wall 44 of the battery cell 4 to seal the outer peripheral wall of the battery cell 4, and the second sealing ring 232 abuts against the top wall 43 of the battery cell 4 to seal the top wall 43 of the battery cell 4. Thus, the first sealing ring 231 and the second sealing ring 232 achieve a double seal at the end of the battery cell 4 connected to the sealing cavity 24, further improving the sealing effect and ensuring test safety.
[0059] Furthermore, such as Figures 1 to 2 As shown, the cover 2 has a second through hole 22 positioned corresponding to the explosion-proof port 42 of the battery cell 4. The second through hole 22 is spaced apart from the first through hole 21 and communicates with the sealing cavity 24. The second through hole 22 is positioned opposite to the explosion-proof port 42 of the battery cell 4. The second through hole 22 communicates with the sealing cavity 24, and its position is opposite to the explosion-proof port 42 of the battery cell 4. If material is ejected from the explosion-proof port 42 of the battery cell 4 during the constraint capacity test, the material can be ejected through the second through hole 22, improving the safety of the test.
[0060] As one embodiment, such as Figure 1 As shown, the outer contour of the second through hole 22 is located on the outer periphery of the outer contour of the explosion-proof port 42 of the battery cell 4, so as to ensure that the ejected material from the explosion-proof port 42 can be discharged through the second through hole 22 when ejected. Preferably, the radial distance between the outer contour of the second through hole 22 and the outer contour of the explosion-proof port 42 is set to be more than 5 mm.
[0061] Furthermore, such as Figure 6 As shown, the tray 3 also includes a protective layer 33, which is connected to the sub-receiving cavity 362. The protective layer 33 covers the inner wall of the sub-receiving cavity 362. The battery cell 4 is placed in the sub-receiving cavity 362. The protective layer 33 is made of soft material to prevent the battery cell 4 from making hard contact in the sub-receiving cavity 362 and to prevent the appearance of the battery cell 4 from being scratched.
[0062] As one embodiment, such as Figure 6 As shown, the protective layer 33 is made of soft rubber. Rubber materials are relatively inexpensive and have mature processing technologies (such as molding and extrusion), making them suitable for large-scale production.
[0063] Furthermore, such as Figure 6As shown, the sub-receiving cavity 362 has a peripheral side 3621 surrounding the third direction Z, and a protective layer 33 is disposed around the peripheral side 3621 of the sub-receiving cavity 362. The protective layer 33 covers the peripheral side 3621 of the sub-receiving cavity 362, thereby improving the protection effect on the battery cell 4.
[0064] As one embodiment, such as Figure 6 As shown, the sub-receiving cavity 362 includes a bottom surface connected to one end of the peripheral side surface 3621 in the third direction Z. The peripheral side surface 3621 and the bottom surface enclose the sub-receiving cavity 362. When the battery cell 4 is placed in the sub-receiving cavity 362, the bottom surface supports the battery cell 4. There is a preset distance between the multiple peripheral side surfaces 3621 and the outer peripheral surface of the battery cell 4. The preset distance is sufficient to accommodate the liquid used for constraint capacity testing. Preferably, the preset distance is set to 10mm or more to provide a larger liquid accommodating space for testing, while also accommodating larger-sized battery cells 4 for constraint capacity testing, thus improving applicability.
[0065] Furthermore, such as Figure 1 As shown, the cover 2 has an elastic compensation part 37 on the side facing the tray 3 and / or the tray 3 has an elastic compensation part 37 on the side facing the cover 2. The cover 2 and the tray 3 are connected by an interference fit through the elastic compensation part 37. The opposite surfaces of the cover 2 and the tray 3 are connected by the elastic compensation part 37. When the tray 3 and the cover 2 are pressed together, the tray 3 and the cover 2 are brought closer to each other. The elastic compensation part 37 undergoes elastic deformation, so that the tray 3 and the cover 2 are sealed by the interference fit through the elastic compensation part 37.
[0066] In one embodiment, the cover 2 and the tray 3 can be connected by means of locking, pressing or other methods.
[0067] When performing a constraint capacity test on the battery cell 4, the constraint capacity testing device of this invention fills each sub-receptacle 362 with liquid through the liquid inlet 34. The hydrostatic liquid surrounds the battery cell 4, and the applied liquid pressure is controlled by an external hydraulic device. Due to the continuous transmission of the liquid medium, the overall stress on the battery cell 4 casing is more uniform. The liquid injected into the receptacle 36 is water or other environmentally friendly solvents that do not damage the battery cell 4 casing.
[0068] In summary, this utility model embodiment provides a constraint capacity testing device. The probe assembly 1 is connected to the electrode 41 of the battery cell 4 through the first through hole 21 of the cover 2 for constraint capacity testing. The cover 2 and the tray 3 have a placement opening 38 and a receiving cavity 36. The cover 2 seals the placement opening 38 and the receiving cavity 36. The receiving cavity 36 can accommodate the battery cell 4 used for constraint capacity testing and the liquid used to apply static pressure to the battery cell 4. Other areas of the tray 3 have liquid inlets 34 and liquid outlets 35 that are respectively connected to the receiving cavity 36 to realize the injection and discharge of liquid in the receiving cavity 36. After the liquid is injected into the receiving cavity 36, the battery cell 4 is at least partially immersed in the liquid and surrounded by the liquid. Then, the constraint force is transmitted to the battery casing through the static pressure of the liquid, making the overall effect of the battery cell 4 more uniform. At the same time, the liquid can quickly cool the heat generated by the battery cell 4 during the capacity testing process, and the static pressure liquid has no direct friction on the battery casing and has a certain cleaning effect, which helps to improve the yield of the subsequent coating process.
[0069] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.
Claims
1. A restraint and separation device, having a third direction (Z), characterized in that, The restraint and volume-dividing device includes: The tray (3) is provided with a liquid inlet (34), a liquid outlet (35), a placement port (38), and a receiving cavity (36) for containing liquid and battery cell (4). The placement port (38) is located on one side of the tray (3) along the third direction (Z). The liquid inlet (34), the liquid outlet (35), and the placement port (38) are spaced apart from each other and are all connected to the receiving cavity (36). A cover (2) is provided on the placement opening (38) and sealed to the tray (3); the cover (2) is provided with a first through hole (21) extending along the third direction (Z); A probe assembly (1) is inserted through the first through hole (21); the probe assembly (1) is used to contact the battery cell (4).
2. The restraint and capacity-dividing device according to claim 1, characterized in that: The tray (3) includes a tray body (31) and a partition (32). The liquid inlet (34), the liquid outlet (35), the placement port (38), and the receiving cavity (36) are all disposed in the tray body (31). The partition (32) is located in the receiving cavity (36) and divides the receiving cavity (36) into a plurality of sub-receiving cavities (362). The partition (32) is provided with a connecting hole (323). Two adjacent sub-receiving cavities (362) of the same partition (32) are connected through the connecting hole (323), and at least one sub-receiving cavity (362) is connected to the liquid inlet (34) and / or the liquid outlet (35).
3. The restraint and capacity-dividing device according to claim 2, characterized in that: It also has a first direction (X) and a second direction (Y), wherein the first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other; The partition (32) includes a first partition (321) and a second partition (322). The first partition (321) extends along the first direction (X), and the second partition (322) extends along the second direction (Y). The first partition (321) and the second partition (322) intersect and divide the receiving cavity (36) into a plurality of the sub-receiving cavities (362). The connecting hole (323) is formed in the first partition (321) and / or the second partition (322).
4. The restraint and capacity-dividing device according to claim 3, characterized in that: The disc body (31) is provided with an outlet (35) and an inlet (34) at both ends in the second direction (Y). The outlet (35) and the inlet (34) at the same end of the disc body (31) in the second direction (Y) are connected. Multiple first partitions (321) are provided, and the multiple first partitions (321) are spaced apart along the second direction (Y). The connecting hole (323) is opened in the first partition (321); or The disc body (31) is provided with an outlet (35) and an inlet (34) at both ends of the second direction (Y). The inlet (34) is connected to the outlet (35). Multiple first partitions (321) are provided, and the multiple first partitions (321) are spaced apart along the second direction (Y). The connecting hole (323) is opened in the first partition (321).
5. The restraint and capacity-dividing device according to claim 2, characterized in that: The cover (2) is provided with a plurality of sealing cavities (24) with openings facing the disc (31). The first through hole (21) communicates with the sealing cavity (24). The sealing cavity (24) and the sub-accommodating cavity (362) are arranged in a one-to-one correspondence along the third direction (Z). The inner wall of the sealing cavity (24) is connected with a sealing ring (23). The sealing ring (23) is used to seal and cooperate with the battery cell (4) and isolate the first through hole (21) from the sub-accommodating cavity (362).
6. The restraint and capacity-dividing device according to claim 5, characterized in that: The sealing ring (23) includes a first sealing ring (231) and a second sealing ring (232); the first sealing ring (231) and the second sealing ring (232) are both connected to the inner wall of the sealing cavity (24); The battery cell has a top wall (43) perpendicular to the third direction (Z) and a side wall (44) parallel to the third direction (Z). The first sealing ring (231) is used to seal against the side wall (44), and the second sealing ring (232) is used to abut against the top wall (43).
7. The restraint and capacity-dividing device according to claim 5, characterized in that: The cover (2) is provided with a second through hole (22), which is spaced apart from the first through hole (21). The second through hole (22) communicates with the sealing cavity (24) and is arranged opposite to the explosion-proof port (42) of the battery cell (4).
8. The restraint and capacity-dividing device according to claim 2, characterized in that: The tray (3) also includes a protective layer (33) which is connected to the sub-receiving cavity (362).
9. The restraint and capacity-dividing device according to claim 8, characterized in that: The sub-receiving cavity (362) has a peripheral side surface (3621) surrounding the third direction (Z), and the protective layer (33) is disposed around the peripheral side surface (3621) of the sub-receiving cavity (362).
10. The restraint and capacity-dividing device according to claim 1, characterized in that: The cover (2) is provided with an elastic compensation part (37) on the side facing the tray (3) and / or the tray (3) is provided with an elastic compensation part (37) on the side facing the cover (2), and the cover (2) and the tray (3) are connected by an interference fit through the elastic compensation part (37).