Clamping device and clamp thereof

Abstract

The invention provides a clamping device and a clamp thereof, the clamp comprises a supporting seat and at least two clamping assemblies, the clamping assemblies are arranged on the supporting seat, an accommodating space is formed between every two adjacent clamping assemblies, and the clamping assemblies are used for clamping a battery monomer in the accommodating space; the clamping assembly comprises an elastic part and a fluid storage cavity, the elastic part surrounds at least part of the peripheral side of the fluid storage cavity and is arranged towards the accommodating space, and the elastic part is used for abutting against the single battery. The clamp provided by the invention is beneficial to reducing the risk of wrinkling of the electrode assembly, and is beneficial to reducing the risk of lithium precipitation of the battery monomer in the subsequent cycle working process, so that the reliability of the produced battery monomer is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a clamping device and a clamp thereof. Background Art

[0002] Batteries are widely used in electronic devices, such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes and power tools, etc.

[0003] In the development of battery cell technology, in addition to improving the performance of battery cells, the reliability of battery cells is also an issue that needs to be considered. Therefore, how to improve the reliability of battery cells is an issue of continuous improvement in battery cell technology. Summary of the invention

[0004] The embodiments of the present application provide a clamping device and a clamp thereof, which can improve the reliability of battery monomer products.

[0005] In a first aspect, an embodiment of the present application provides a clamp for clamping a battery cell, the clamp comprising a support seat and at least two clamping components, the clamping component being arranged on the support seat, with a receiving space between two adjacent clamping components, the clamping component being used to clamp the battery cell in the receiving space; the clamping component comprising an elastic member and a fluid storage cavity, the elastic member being arranged around at least a portion of the circumference of the fluid storage cavity and being arranged toward the receiving space, the elastic member being used to resist the battery cell.

[0006] The clamp provided in the embodiment of the present application has an elastic member and a fluid storage chamber by providing a clamping assembly. When the clamp clamps a battery cell, the elastic member abuts against the battery cell, and the elastic member can deform according to the pressure deformation in the fluid storage chamber to achieve a relatively uniform pressure on various parts of the battery cell that abut against the elastic member. In this way, when the battery cell is clamped by the clamp, the extrusion force on the electrode assembly is relatively consistent during the process of charging and discharging the battery cell, or during the process of injecting liquid into the battery cell, which is beneficial to reducing the risk of wrinkles in the electrode assembly. In the subsequent cycle operation, it is beneficial to reduce the risk of lithium plating in the battery cell, thereby improving the reliability of the produced battery cell.

[0007] In some embodiments, two elastic members of two adjacent clamping assemblies define a receiving space, which is beneficial to further reduce the risk of wrinkles on the pole piece of the electrode assembly, thereby reducing the possibility of lithium deposition in the electrode assembly, and further improving the reliability of the produced battery cell.

[0008] In some embodiments, the clamping assembly has a fluid inlet and outlet, and the fluid inlet and outlet communicate with the fluid storage chamber and the outside of the fluid storage chamber. The pressure in the fluid storage chamber can be adjusted to adjust the pressure of the elastic member on the battery cell, which is conducive to further reducing the risk of wrinkles. In addition, by changing the pressure of the fluid in the fluid storage chamber, the elastic member can be applicable to battery cells of different specifications, which is conducive to improving the compatibility of the clamp with battery cells of different specifications.

[0009] In some embodiments, the clamping assembly further includes a frame, which is disposed around the elastic member and the elastic member is connected to the frame. The frame can provide a certain support for the elastic member, which is beneficial to improving the structural strength and service life of the clamping assembly.

[0010] In some embodiments, the elastic member includes a main body and an anti-corrosion layer, and the anti-corrosion layer is coated on the outer surface of the main body, which is beneficial to improving the anti-corrosion ability of the elastic member, thereby improving the reliability and service life of the elastic member.

[0011] In some embodiments, the elastic member includes an elastic compression member and an elastic protective member, the elastic compression member has a fluid storage cavity and is connected to the frame, and the elastic protective member is arranged on the side of the elastic compression member facing the accommodation space, which is beneficial to improving the corrosion resistance of the elastic member, thereby improving the reliability and service life of the clamp.

[0012] In some embodiments, the elastic protective member is sleeved on the outside of the elastic pressure-changing member, which is beneficial to further reduce the possibility of corrosion of the elastic pressure-changing member caused by contact between the elastic pressure-changing member and the electrolyte.

[0013] In some embodiments, the material of the elastic compression member includes styrene-butadiene, EPDM, fluorine, silicone or rubber, which is conducive to maintaining the elastic compression member with appropriate pressure on the elastic protective member, and then on the battery cell, so as to maintain the clamp to have a relatively stable clamping effect on the battery cell.

[0014] In some embodiments, the material of the elastic protective member includes polypropylene, polyethylene, polyamide, polycarbonate or acrylonitrile-butadiene-styrene copolymer. In this way, under the premise of achieving the elastic member having a suitable pressure on the battery cell, it is also beneficial to reduce the corrosion of the electrolyte on the elastic member, and it is beneficial to maintain the structural stability of the elastic member, thereby improving the reliability of the clamp.

[0015] In some embodiments, the elastic protective member is arc-shaped and protrudes toward the accommodation space. When the clamp clamps the battery cell, it is beneficial to maintain good contact between the elastic protective member and the battery cell, thereby improving the uniformity of the pressure of the battery cell and further reducing the possibility of lithium deposition in the battery cell.

[0016] In some embodiments, the elastic protective member is bonded to the elastic pressure-changing member. The elastic member and the elastic pressure-changing member have good contact, and the fluid pressure in the fluid storage chamber can be accurately transmitted to the elastic protective member through the elastic pressure-changing member, thereby facilitating the uniformity of the pressure of the elastic protective member on the battery cell.

[0017] In some embodiments, the elastic protective member is detachably connected to the frame body, which is conducive to achieving compatibility of the clamp with battery cells of different specifications, facilitating maintenance of the clamp, and increasing the service life of the clamp.

[0018] In some embodiments, the frame includes a frame body and a pressing member, the pressing member is detachably connected to the frame body, the elastic compression member is connected to the frame body, and the elastic protective member is sandwiched between the frame body and the pressing member, so that the replacement of the elastic protective member is easy and quick.

[0019] In some embodiments, the clamp further includes a fluid pipeline and a plugging member, wherein the fluid pipeline is provided through the frame and connected to the fluid storage cavity, and the plugging member is provided in the fluid pipeline to prevent the fluid in the fluid pipeline from flowing out, so as to facilitate adjusting the pressure in the fluid storage cavity as required, so that the clamping assembly exerts a suitable pressure on the battery cell, further reducing the possibility of lithium deposition in the battery cell.

[0020] In some embodiments, the clamp further includes a guide member, which cooperates with the clamping assembly, and the clamping assembly is configured to be able to move relative to the guide member in a direction toward or away from another adjacent clamping assembly. This is conducive to further improving the compatibility of the clamp to adapt to different types of battery cells, and is conducive to further increasing the pressure of the clamping assembly on the battery cell, and further reducing the risk of lithium deposition in the battery cell.

[0021] In a second aspect, an embodiment of the present application provides a clamping device, comprising the clamp provided by any of the above embodiments.

[0022] The clamping device provided in the embodiment of the present application has the same technical effect as the clamp provided in any of the above embodiments, and will not be described in detail here.

[0023] In some embodiments, the clamping device further comprises an inflating assembly, which is used to inflate gas into the fluid storage cavity of the elastic member, so as to adjust the pressure in the fluid storage cavity in a timely and convenient manner to adjust the clamping force of the clamping assembly on the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. 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 the drawings without paying creative work.

[0025] Figure 1 is a schematic diagram of the structure of a clamp clamping a battery cell provided in an embodiment of the present application;

[0026] Figure 2 is a schematic cross-sectional structural diagram of a clamping assembly in a clamp provided in an embodiment of the present application;

[0027] Figure 3 is a schematic cross-sectional structural diagram of another clamping assembly in a clamp provided in an embodiment of the present application;

[0028] Figure 4 is a schematic structural diagram of a clamping assembly provided in an embodiment of the present application;

[0029] Figure 5 is a front view of a clamping assembly provided in an embodiment of the present application;

[0030] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure along AA;

[0031] Figure 7 is a schematic diagram of the structure of the clamp provided in an embodiment of the present application;

[0032] Figure 8 It is a schematic diagram of the structure of the clamping device provided in an embodiment of the present application.

[0033] In the drawings, the drawings are not necessarily drawn to scale.

[0034] Marking Description:

[0035] 1. Fixture; 1a. Accommodation space;

[0036] 11. Support seat;

[0037] 12, clamping assembly; 12a, fluid storage chamber; 12b, fluid inlet and outlet; 121, elastic member; 121a, main body; 121b, anti-corrosion layer; 1211, elastic pressure-changing member; 1212, elastic protective member; 122, frame; 1221, frame body; 1222, pressing member; 123, fluid pipeline; 124, guide member;

[0038] 10. Clamping device;

[0039] 2. Inflatable components;

[0040] 20. Battery cell. DETAILED DESCRIPTION

[0041] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0042] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0043] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0044] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0045] The term "plurality" used in the present application refers to two or more (including two).

[0046] The battery cell mentioned in this application generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow the active ions to pass through.

[0047] The battery cell also includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0048] Optionally, the electrode assembly is a winding structure. The positive electrode sheet and the negative electrode sheet are wound into a winding structure. Alternatively, the electrode assembly is a laminated structure.

[0049] The battery cell also includes a shell, and a housing cavity for accommodating the electrode assembly is formed inside the shell. The shell can protect the electrode assembly from the outside to prevent external foreign matter from affecting the charging or discharging of the electrode assembly. The shell can be a hard shell or a soft shell, and correspondingly, the battery cell can be a hard shell battery cell, or the battery cell is a soft pack battery cell.

[0050] In the production process of battery cells, it is usually necessary to perform operations such as liquid injection and formation on the battery cells. This operation requires the use of a clamp to clamp the battery cells. In the process of the clamp clamping the battery cells, the clamping force of the clamp on different parts of the battery cells is not the same. As a result, the clamping force on different parts of the battery cells is not the same. During the cyclic charge and discharge process of the battery cells, the pressure on the electrode assembly is inconsistent, the deformation of different parts of the electrode assembly is inconsistent, and the pole pieces of the electrode assembly are prone to wrinkles, which can easily cause the risk of lithium deposition in the electrode assembly, thus seriously affecting the reliability of the battery cells.

[0051] In view of this, if Figure 1 and Figure 2 As shown, the embodiment of the present application provides a clamp 1 for clamping a battery cell 20, the clamp 1 includes a support seat 11 and at least two clamping assemblies 12, the clamping assemblies 12 are arranged on the support seat 11. There is a receiving space 1a between two adjacent clamping assemblies 12, the clamping assemblies 12 are used to clamp the battery cell 20 in the receiving space 1a; the clamping assemblies 12 include an elastic member 121, the elastic member 121 has a fluid storage cavity 12a, is arranged toward the receiving space 1a, and is used to abut against the battery cell 20.

[0052] The clamp 1 includes at least two clamping components 12, and there is a receiving space 1a between two adjacent clamping components 12, and the battery cell 20 is clamped in the receiving space 1a by the clamping components 12. Then the clamp 1 can have more than three clamping components 12, and the multiple clamping components 12 can be arranged in one row, two rows or more rows along one direction. In this way, the clamp 1 can clamp multiple battery cells 20, and the multiple battery cells 20 are arranged in one row, two rows or more rows along one direction.

[0053] The elastic member 121 has a fluid storage chamber 12a, and optionally, the fluid storage chamber 12a can be used to store liquid or gas. Optionally, the fluid storage chamber 12a can be sealed, so that the amount of fluid stored in the fluid storage chamber 12a can be fixed, and the pressure in the fluid storage chamber 12a can also be fixed. Alternatively, the fluid storage chamber 12a can be provided with an opening, and when necessary, the fluid can be filled into the fluid storage chamber 12a, or the fluid can be extracted from the fluid storage chamber 12a to increase or decrease the internal pressure of the fluid storage chamber 12a.

[0054] The elastic member 121 is disposed toward the accommodation space 1a, and optionally, one elastic member 121 can be disposed toward an adjacent accommodation space 1a, or one elastic member 121 can be disposed toward two adjacent accommodation spaces 1a. In this way, the elastic member 121 of each clamping assembly 12 abuts against at least one battery cell 20, and one side or both sides of the battery cell 20 in at least one accommodation space 1a abut against the elastic member 121.

[0055] Optionally, the elastic member 121 may be arranged toward one of two adjacent accommodating spaces 1 a , or the elastic member 121 may be arranged toward two adjacent accommodating spaces 1 a , so that the elastic member 121 abuts against two adjacent battery cells 20 .

[0056] The elastic member 121 may be any elastic structure. For example, the elastic member 121 may be an elastic sac-like structure. The elastic member 121 itself surrounds the fluid storage chamber 12a. Alternatively, the elastic member 121 may be in a sheet shape and connected to other structures. The elastic member 121 and other related structures surround the fluid storage chamber 12a. As long as the elastic member 121 can be elastically deformed as the pressure in the fluid storage chamber 12a changes, it will be sufficient.

[0057] The elastic member 121 abuts against the battery cell 20. Since the elastic member 121 surrounds at least part of the peripheral side of the fluid storage chamber 12a, during the process of the elastic member 121 squeezing the battery cell 20, due to the fluidity of the fluid in the fluid storage chamber 12a, the pressure of the fluid in the fluid storage chamber 12a on the elastic member 121 will be redistributed, and the elastic member 121 will produce corresponding deformation until the pressure of the part where the elastic member 121 abuts against the battery cell 20 is equal in a stable state. Therefore, during the process of clamping the battery cell 20, the elastic member 121 can maintain the uniformity of the clamping force on the battery cell 20, and during the expansion of the battery cell 20, the elastic member 121 can also maintain the uniformity of the clamping force on the battery cell 20 by deformation, so as to achieve the uniformity of the force on the electrode assembly of the battery cell 20.

[0058] The clamping assembly 12 includes an elastic member 121 . The clamping assembly 12 may include only the elastic member 121 , or the clamping assembly 12 may also include other structures to support the elastic member 121 , which may be selected according to actual needs.

[0059] The clamp 1 provided in the embodiment of the present application is provided with a clamping assembly 12 having an elastic member 121 and a fluid storage chamber 12a. When the clamp 1 clamps the battery cell 20, the elastic member 121 is against the battery cell 20. The elastic member 121 can be deformed according to the pressure change in the fluid storage chamber 12a to achieve a relatively uniform pressure on various parts of the battery cell 20 against the elastic member 121. In this way, when the battery cell 20 is clamped by the clamp 1, during the charging and discharging process, or during the injection process of the battery cell 20, the extrusion force on the electrode assembly is relatively consistent, which is beneficial to reducing the risk of wrinkles in the electrode assembly. In the subsequent cycle operation process, it is beneficial to reduce the risk of lithium plating in the battery cell 20, thereby improving the reliability of the produced battery cell 20.

[0060] It is understandable that the clamp 1 provided in the embodiment of the present application can be used in any process that requires clamping the battery cell 20, such as the formation and injection of the battery cell 20. In the process of using the clamp 1 to form the battery cell 20, the elastic member 121 has a better interface contact with the battery cell 20, and the battery cell 20 is more evenly compressed, which is beneficial to improve the exhaust rate of the battery cell 20 and to form a SEI (Solid Electrolyte Interface) film with uniform thickness and relatively stable performance.

[0061] like Figure 1 As shown, in some embodiments, two elastic members 121 of two adjacent clamping assemblies 12 define a receiving space 1 a.

[0062] In this way, the accommodating space 1a is adjacent to the elastic parts 121 of the two adjacent clamping assemblies 12. When the battery cell 20 is clamped in the accommodating space 1a, the opposite side surfaces of the battery cell 20 are against the elastic parts 121, and the pressure on the opposite sides of the electrode assembly is relatively uniform, which is beneficial to further reduce the risk of wrinkles on the electrode sheets of the electrode assembly, thereby reducing the possibility of lithium plating in the electrode assembly, and further improving the reliability of the produced battery cell 20.

[0063] It is understandable that both sides of each accommodating space 1a may be arranged to be adjacent to the elastic member 121 , so that both opposite side surfaces of each battery cell 20 abut against the elastic member 121 , which is beneficial to further improve the reliability of the battery cell 20 .

[0064] like Figure 2As shown, in some embodiments, the clamping assembly 12 has a fluid inlet and outlet 12 b , and the fluid inlet and outlet 12 b communicates with the fluid storage chamber 12 a and the outside of the fluid storage chamber 12 a .

[0065] The fluid inlet and outlet 12b can be formed on the elastic member 121 so that the fluid can be input into the fluid storage chamber 12a through the fluid inlet and outlet 12b, or the fluid in the fluid storage chamber 12a can be discharged through the fluid inlet and outlet 12b. In this way, the pressure in the fluid storage chamber 12a can be increased or decreased, so as to adjust the pressure of the elastic member 121 on the battery cell 20 as needed.

[0066] It is understandable that during the operation of the clamp 1, the fluid inlet and outlet 12b may be blocked to maintain the pressure in the fluid storage chamber 12a.

[0067] Therefore, by providing the fluid inlet and outlet 12b, the pressure in the fluid storage chamber 12a can be adjusted to adjust the pressure of the elastic member 121 on the battery cell 20, which is beneficial to further reduce the risk of wrinkles. In addition, the volumes of battery cells 20 of different specifications are different, and by changing the pressure of the fluid in the fluid storage chamber 12a, the elastic member 121 can be applied to battery cells 20 of different specifications, which is beneficial to improve the compatibility of the clamp 1 with battery cells 20 of different specifications.

[0068] like Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the clamping assembly 12 further includes a frame 122 , the frame 122 is disposed around the elastic member 121 , and the elastic member 121 is connected to the frame 122 .

[0069] The frame 122 is disposed around the elastic member 121 , and the frame 122 can be disposed around the elastic member 121 adjacent to the accommodating space 1a , and can provide a certain support for the elastic member 121 , which is beneficial to improving the structural strength and service life of the clamping assembly 12 .

[0070] The elastic member 121 is connected to the frame 122 , and optionally, the elastic member 121 may be bonded to the frame 122 , or the elastic member 121 may be clamped to the frame 122 . Of course, the elastic member 121 may also be snapped to the frame 122 .

[0071] Optionally, the frame 122 may be an integrally formed frame structure, or the frame 122 may be

[0072] The fluid storage chamber 12a may be formed by the elastic member 121 itself, or a frame 122 and the elastic member 121 may be provided to surround the fluid storage chamber 12a.

[0073] In an embodiment where the clamping assembly 12 has a fluid inlet and outlet 12b and the frame 122 and the elastic member 121 are integrally formed to form a fluid storage chamber 12a, the fluid inlet and outlet 12b can be formed in the elastic member 121, or the fluid inlet and outlet 12b is formed in the frame 122, which can be set according to actual needs.

[0074] It is understandable that under some working conditions, for example, during the formation of the battery cell 20 clamped by the clamp 1, there is a risk of leakage of the electrolyte in the battery cell 20. The electrolyte at the leakage point has a certain corrosive effect on the elastic part 121 of the clamping assembly 12. At this time, the elastic part 121 is required to have a certain anti-corrosion ability.

[0075] like Figure 3 As shown, in some embodiments, the elastic member 121 includes a main body portion 121a and an anti-corrosion layer 121b, and the anti-corrosion layer 121b is coated on the outer surface of the main body portion 121a.

[0076] The anti-corrosion layer 121 b may be fluorine. Thus, by providing the anti-corrosion layer 121 b on the outer surface of the elastic member 121 , it is beneficial to improve the anti-corrosion capability of the elastic member 121 , thereby improving the reliability and service life of the elastic member 121 .

[0077] like Figure 5 and Figure 6 As shown, in some embodiments, the elastic member 121 includes an elastic compression member 1211 and an elastic protective member 1212. The elastic compression member 1211 has a fluid storage cavity 12a and is connected to the frame 122. The elastic protective member 1212 is arranged on the side of the elastic compression member 1211 facing the accommodating space 1a.

[0078] The elastic protective member 1212 is arranged on the side wall of the elastic compression variable member 1211 facing the accommodating space 1a. Optionally, the elastic protective member 1212 can be only arranged on the part of the elastic compression variable member 1211 facing the accommodating space to reduce the possibility of corrosion caused by contact between the elastic compression variable member 1211 and the electrolyte, etc.; or, the elastic protective member 1212 can be sleeved on the outside of the entire elastic compression variable member 1211 to protect the entire elastic compression variable member 1211.

[0079] Optionally, the elastic compression change piece 1211 can maintain a state of being against the elastic protective piece 1212, or, when the pressure in the fluid storage chamber 12a is low, the elastic compression change piece 1211 and the elastic protective piece 1212 are spaced apart, and as the pressure in the fluid storage chamber 12a increases, the elastic compression change piece 1211 elastically deforms and bulges, and when the pressure reaches a certain level, the elastic compression change piece 1211 is against the elastic protective piece 1212 and generates pressure on the elastic protective piece 1212, so that the elastic protective piece 1212 is deformed under the action of the internal pressure.

[0080] The elastic protective member 1212 can be made of a material with a certain elasticity and a certain degree of corrosion resistance, so that when the clamp 1 clamps the battery cell 20, even if the electrolyte contacts the elastic protective member 1212, the elastic member 121 can still maintain normal operation, which is beneficial to improving the reliability and service life of the clamp 1.

[0081] In some embodiments, the elastic protective member 1212 is sleeved on the outside of the elastic compression member 1211 .

[0082] This helps to further reduce the possibility of corrosion of the elastic compression member 1211 caused by contact between the elastic compression member 1211 and the electrolyte.

[0083] In some embodiments, the material of the elastic compression member 1211 includes styrene-butadiene, EPDM, fluorine, silicone or rubber.

[0084] Optionally, the material of the elastic compression member 1211 may include any one or more of styrene-butadiene, ethylene-propylene-diene, fluorine, silicone and rubber.

[0085] Butadiene-styrene, EPDM, fluorine, silicone and rubber all have a suitable elastic modulus, which is conducive to maintaining the elastic pressure-changing member 1211 with a suitable pressure on the elastic protective member 1212 when the pressure in the fluid storage chamber 12a is appropriate, and then maintaining a suitable pressure on the battery cell 20, so as to maintain the clamp 1 with a relatively stable clamping effect on the battery cell 20.

[0086] In some embodiments, the material of the elastic protective member 1212 includes polypropylene, polyethylene, polyamide, polycarbonate, or acrylonitrile-butadiene-styrene copolymer.

[0087] Optionally, the material of the elastic protective member 1212 may include any one or more of polypropylene, polyethylene, polyamide, polycarbonate, and acrylonitrile-butadiene-styrene copolymer.

[0088] It is understandable that polypropylene, polyethylene, polyamide, polycarbonate and acrylonitrile-butadiene-styrene copolymer all have a suitable elastic modulus and a high ability to resist electrolyte corrosion. Therefore, such a configuration, while achieving a suitable pressure of the elastic member 121 on the battery cell 20, is also conducive to reducing the corrosion of the electrolyte on the elastic member 121, and is conducive to maintaining the structural stability of the elastic member 121, thereby improving the reliability of the clamp 1.

[0089] like Figure 1 and 6 As shown, in some embodiments, the elastic protective member 1212 is arc-shaped and protrudes toward the accommodating space 1a.

[0090] When the clamp 1 is clamping the battery cell 20 , the elastic protective member 1212 abuts against the battery cell 20 . Since the elastic protective member 1212 is arc-shaped and protrudes toward the accommodating space 1a , the elastic deformation of the elastic protective member 1212 can be utilized to ensure good contact between the elastic protective member 1212 and the battery cell 20 .

[0091] Therefore, the elastic protective member 1212 is arranged to be arc-shaped and protrude toward the accommodating space 1a. In the process of the clamp 1 clamping the battery cell 20, it is beneficial to maintain good contact between the elastic protective member 1212 and the battery cell 20, thereby improving the uniformity of the pressure of the battery cell 20 and further reducing the possibility of lithium deposition in the battery cell 20.

[0092] In some embodiments, the elastic protective member 1212 is adhesively connected to the elastic compression member 1211 .

[0093] The elastic protective member 1212 is adhesively connected to the elastic compression member 1211, so the elastic member 121 has good contact with the elastic compression member 1211, and the fluid pressure in the fluid storage chamber 12a can be accurately transmitted to the elastic protective member 1212 through the elastic compression member 1211, which is beneficial to improve the uniformity of the pressure of the elastic protective member 1212 on the battery cell 20.

[0094] like Figure 5 and Figure 6 As shown, in some embodiments, the elastic protective member 1212 is detachably connected to the frame 122 .

[0095] The elastic protective member 1212 is detachably connected to the frame 122 , and illustratively, the elastic protective member 1212 and the frame 122 can be connected by snapping, or the elastic protective member 1212 can be detachably clamped to the frame 122 .

[0096] It is understandable that the sizes of battery cells 20 of different specifications are not the same. In the process of the clamp 1 clamping battery cells 20 of different specifications, in order to ensure the compatibility of the clamping assembly 12 with battery cells 20 of different specifications, multiple groups of elastic protective parts 1212 matching the battery cells 20 of corresponding specifications can be set. In the process of the clamp 1 needing to change the specifications of the clamped battery cells 20, the compatibility of the clamp 1 with battery cells 20 of different specifications can be achieved by replacing the elastic protective parts 1212.

[0097] In addition, in the event that the elastic protective member 1212 is damaged during operation, only the corresponding elastic protective member 1212 needs to be replaced without rendering the entire clamp 1 unusable, thereby facilitating maintenance work on the clamp 1 .

[0098] Therefore, providing the elastic protective member 1212 and the frame body 122 in a detachable connection is conducive to achieving the compatibility of the clamp 1 with battery cells 20 of different specifications, and is convenient for the maintenance of the clamp 1, thereby increasing the service life of the clamp 1.

[0099] like Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the frame 122 includes a frame body 1221 and a pressing piece 1222 , the pressing piece 1222 is detachably connected to the frame body 1221 , the elastic compression piece 1211 is connected to the frame body 1221 , and the elastic protective piece 1212 is clamped between the frame body 1221 and the pressing piece 1222 .

[0100] The pressing member 1222 is detachably connected to the frame body 1221. Optionally, the pressing member 1222 and the frame body 1221 can be connected by snapping or by connecting members such as bolts. When the pressing member 1222 and the frame body 1221 are in a connected state, the elastic protective member 1212 is sandwiched between the frame body 1221 and the pressing member 1222 to protect the elastic compression member 1211. When the elastic protective member 1212 needs to be replaced, the pressing member 1222 can be removed from the frame body 1221 to achieve replacement of the elastic protective member 1212.

[0101] Therefore, the frame 122 includes a frame body 1221 and a pressing piece 1222 , and the frame body 1221 and the pressing piece 1222 are detachably connected to facilitate replacement of the elastic protective piece 1212 , making replacement of the elastic protective piece 1212 more convenient and quicker.

[0102] like Figure 4 and Figure 5 As shown, in some embodiments, the clamp 1 also includes a fluid pipeline 123 and a plugging member. The fluid pipeline 123 passes through the frame 122 and is connected to the fluid storage cavity 12a. The plugging member is arranged in the fluid pipeline 123 to prevent the fluid in the fluid pipeline 123 from flowing out.

[0103] The fluid conduit 123 is disposed through the frame 122 and is connected to the fluid storage chamber 12a. Fluid can be input into the fluid storage chamber 12a through the fluid conduit 123, or the fluid in the fluid storage chamber 12a can be discharged through the fluid conduit 123 to increase or decrease the pressure in the fluid storage chamber 12a. When the volume of the fluid in the fluid storage chamber 12a needs to be kept unchanged, the fluid conduit 123 can be blocked by a blocking member to prevent the fluid in the fluid conduit 123 from flowing out.

[0104] Therefore, the clamp 1 is also provided with a fluid conduit 123 and a plugging member, so as to change the pressure in the fluid storage chamber 12a as needed, so that the clamping assembly 12 exerts a suitable pressure on the battery cell 20, further reducing the possibility of lithium deposition in the battery cell 20.

[0105] like Figure 7 As shown, in some embodiments, the clamp 1 further includes a guide member 124 , which cooperates with the clamping assembly 12 , and the clamping assembly 12 is configured to be able to move relative to the guide member 124 in a direction toward or away from another adjacent clamping assembly 12 .

[0106] Optionally, the guide member 124 may be a structure such as a groove provided on the support seat 11 , or the guide member 124 may be a structure such as a lead screw or a guide rod provided on the support seat 11 .

[0107] The clamping assembly 12 and the guide member 124 may be slidably matched to achieve sliding movement of the clamping assembly 12 relative to the guide member 124 , or the clamping assembly 12 and the guide member 124 may be threadedly matched to achieve spiral movement of the clamping assembly 12 relative to the guide member 124 .

[0108] If the clamp 1 includes a guide member 124, the distance between two adjacent clamping assemblies 12 can be adjusted by moving the frame 122 along the guide member 124, thereby adjusting the size of the accommodating space 1a. In this way, not only can the compatibility of the clamp 1 with different battery cells 20 be achieved by moving the frame 122, but the pressure of the elastic member 121 of the clamping assembly 12 on the battery cell 20 can also be adjusted by moving the frame 122.

[0109] Therefore, the clamp 1 is also provided with a guide member 124, and the clamping assembly 12 is provided so as to be able to move relative to the guide member 124 in a direction toward or away from another adjacent clamping assembly 12, which is beneficial to further improve the compatibility of the clamp 1 to adapt to different types of battery cells 20, and is beneficial to further increase the pressure of the clamping assembly 12 on the battery cell 20, thereby further reducing the risk of lithium deposition in the battery cell 20.

[0110] It can be understood that the movement of the clamping assembly 12 relative to the guide member 124 can be driven manually, or the movement of the clamping assembly 12 relative to the guide member 124 can be driven by a related driving member.

[0111] Second, as Figure 8 As shown, the clamping device 10 provided in the embodiment of the present application includes the clamp 1 provided in any of the above embodiments.

[0112] It is understandable that the clamping device 10 provided in the embodiment of the present application is used to clamp the battery cell 20 , and the clamping device 10 can be used in any process that requires clamping the battery cell 20 , such as formation or injection of the battery cell 20 .

[0113] The clamping device 10 provided in the embodiment of the present application has the same technical effect as the clamp 1 provided in any embodiment of the present application, and will not be described in detail here.

[0114] Please continue reading Figure 8 In some embodiments, the clamping device 10 further includes an inflatable component 2 , and the inflatable component 2 is used to inflate the fluid storage cavity 12 a of the elastic member 121 with gas.

[0115] The gas filling assembly 2 is provided, and gas can be filled into the fluid storage chamber 12a through the gas filling assembly 2, so that the pressure in the fluid storage chamber 12a can be changed in time as needed, so that the clamping assembly 12 has a suitable clamping force on the battery cell 20. Therefore, the gas filling assembly 2 is provided, so that the pressure in the fluid storage chamber 12a can be adjusted in time and conveniently, so as to adjust the clamping force of the clamping assembly 12 on the battery cell 20.

[0116] In some embodiments, the clamp 1 provided in the present application includes a support seat 11, at least two clamping assemblies 12, a fluid pipeline 123 and a plugging member. The clamping assembly 12 is arranged on the support seat 11, and two elastic members 121 of two adjacent clamping assemblies 12 define a receiving space 1a. The clamping assembly 12 is used to clamp the battery cell 20 in the receiving space 1a; the clamping assembly 12 includes a frame 122, an elastic member 121 and a fluid storage cavity 12a, and the frame 122 is arranged around the elastic member 121, and the elastic member 121 is connected to the frame 122. The elastic member 121 is arranged around at least part of the fluid storage cavity 12a and is arranged toward the receiving space 1a, and the elastic member 121 is used to abut against the battery cell 20. The elastic member 121 includes an elastic compression member 1211 and an elastic protective member 1212. The elastic compression member 1211 has a fluid storage chamber 12a and is connected to the frame 122. The elastic protective member 1212 is sleeved on the outside of the elastic compression member 1211. The material of the elastic compression member 1211 includes styrene-butadiene, EPDM, fluorine, silicone or rubber, and the material of the elastic protective member 1212 includes polypropylene, polyethylene, polyamide, polycarbonate or acrylonitrile-butadiene-styrene copolymer. The elastic protective member 1212 is arc-shaped and protrudes toward the accommodating space 1a. The frame 122 includes a frame body 1221 and a pressing member 1222. The pressing member 1222 is detachably connected to the frame body 1221. The elastic compression member 1211 is connected to the frame body 1221, and the elastic protective member 1212 is sandwiched between the frame body 1221 and the pressing member 1222. The fluid pipeline 123 passes through the frame 122 and communicates with the fluid storage chamber 12 a . The blocking member is disposed in the fluid pipeline 123 to prevent the fluid in the fluid pipeline 123 from flowing out.

[0117] The clamp 1 provided in the embodiment of the present application is provided with a clamping assembly 12 having an elastic member 121 and a fluid storage chamber 12a. When the clamp 1 clamps the battery cell 20, the elastic member 121 is against the battery cell 20. The elastic member 121 can be deformed according to the pressure deformation in the fluid storage chamber 12a to achieve a relatively uniform pressure on various parts of the battery cell 20 that are against the elastic member 121. In this way, when the battery cell 20 is clamped by the clamp 1, during the process of charging and discharging, or during the process of injecting liquid into the battery cell 20, the extrusion pressure borne by the electrode assembly is relatively consistent, which is beneficial to reducing the risk of wrinkles in the electrode assembly. In the subsequent cycle operation, it is beneficial to reduce the risk of lithium deposition in the battery cell 20, thereby improving the reliability of the produced battery cell 20.

[0118] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A clamp, characterized in that: Used to clamp a battery cell, the clamp comprises: Support seat; At least two clamping assemblies are arranged on the support seat, and there is a accommodating space between two adjacent clamping assemblies, and the clamping assembly is used to clamp the battery cell in the accommodating space; the clamping assembly includes an elastic member and a fluid storage cavity, the elastic member is surrounded by at least a portion of the circumference of the fluid storage cavity and is arranged toward the accommodating space, and the elastic member is used to resist the battery cell.

2. The clamp according to claim 1, characterized in that: The two elastic members of two adjacent clamping assemblies define the accommodating space.

3. The clamp according to claim 1 or 2, characterized in that: The clamping assembly has a fluid inlet and outlet, and the fluid inlet and outlet communicate with the fluid storage chamber and the outside of the fluid storage chamber.

4. The clamp according to any one of claims 1 to 3, characterized in that: The clamping assembly further comprises a frame body, the frame body is arranged around the circumference of the elastic member, and the elastic member is connected to the frame body.

5. The clamp according to claim 4, characterized in that: The elastic member comprises a main body and an anti-corrosion layer, and the anti-corrosion layer is coated on the outer surface of the main body.

6. The clamp according to claim 4, characterized in that: The elastic member includes an elastic compression member and an elastic protection member. The elastic compression member has the fluid storage cavity and is connected to the frame. The elastic protection member is arranged on the side of the elastic compression member facing the accommodating space.

7. The clamp according to claim 6, characterized in that The elastic protective piece is sleeved on the outside of the elastic compression-changing piece.

8. The clamp according to claim 6 or 7, characterized in that: The material of the elastic compression member includes styrene-butadiene, EPDM, fluorine, silicone or rubber; and / or, The material of the elastic protective member includes polypropylene, polyethylene, polyamide, polycarbonate or acrylonitrile-butadiene-styrene copolymer.

9. The clamp according to any one of claims 6 to 8, characterized in that: The elastic protective piece is arc-shaped and protrudes toward the accommodating space.

10. The clamp according to any one of claims 6 to 9, characterized in that: The elastic protective member is bonded to the elastic pressure-changing member.

11. The clamp according to any one of claims 6 to 9, characterized in that: The elastic protective member is detachably connected to the frame.

12. The clamp according to claim 11, characterized in that The frame comprises a frame body and a pressing piece, the pressing piece is detachably connected to the frame body, the elastic compression piece is connected to the frame body, and the elastic protective piece is sandwiched between the frame body and the pressing piece.

13. The clamp according to any one of claims 4 to 12, characterized in that: The clamp further comprises a fluid pipeline and a plugging member, wherein the fluid pipeline is arranged through the frame and communicates with the fluid storage cavity, and the plugging member is arranged in the fluid pipeline to prevent the fluid in the fluid pipeline from flowing out.

14. The clamp according to any one of claims 1 to 13, characterized in that: The clamp further comprises a guide member, wherein the guide member cooperates with the clamping assembly, and the clamping assembly is configured to be movable relative to the guide member in a direction toward or away from another adjacent clamping assembly.

15. A clamping device, characterized in that: Comprising a clamp as claimed in any one of claims 1 to 14.

16. The clamping device according to claim 15, characterized in that It also includes an inflation component, which is used to inflate gas into the fluid storage chamber of the elastic member.

Images