Tab clamp and pressurizing formation equipment

Abstract

The utility model relates to the technical field of cell processing, and provides a tab clamp and pressurized formation equipment, the tab clamp comprises a first clamping piece and a second clamping piece which are oppositely arranged, the first clamping piece and the second clamping piece are mutually matched for clamping a tab, at least one of the first clamping piece and the second clamping piece is provided with a flexible connecting piece, and the flexible connecting piece is connected with the first clamping piece and the second clamping piece. The flexible connecting piece is electrically connected with the tab, and when the distance between the tab and the first clamping piece or the second clamping piece is changed, the flexible connecting piece is suitable for being electrically connected with the tab. The tab clamp provided by the utility model is used for solving the defect of abnormal voltage measurement caused by large displacement change of the voltage contact piece in the prior art, and the problem of abnormal voltage measurement caused by large displacement change of the voltage contact piece is solved by arranging the flexible connecting piece on at least one of the first clamping piece and the second clamping piece; and the problem that the pressurization formation of the battery cell cannot be normally carried out due to the problem is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core processing, in particular to a tab clamp and pressurized forming equipment. Background Art

[0002] During the pressurized formation process of the battery cell, the real-time voltage of the battery cell is mainly monitored by the voltage contact piece at the tab clamp. In the existing pressurized formation equipment, the tab clamp and the battery cell clamp are in the same mechanism. In the process of adjusting the pressure through the battery cell clamp, the tab clamp will also move with the movement of the battery cell clamp. In this process, since the voltage contact piece will also move with the tab clamp, when the displacement of the voltage contact piece changes greatly, abnormal voltage measurement often occurs, which will cause the battery cell pressurized formation to fail to proceed normally. In addition, when the monitored voltage of the battery cell is too low due to abnormal measurement, overcharging will occur, and the risk of fire will be caused. Utility Model Content

[0003] The first aspect of the utility model provides a tab clamp to solve the defect of abnormal voltage measurement in the prior art, and can solve the problem of abnormal voltage measurement caused by large displacement changes of the voltage contact piece, and further solve the problem that the battery cell pressurization cannot be carried out normally due to such problem.

[0004] A second aspect of the utility model provides a pressurized formation device.

[0005] The first aspect of the utility model provides a tab clamp, comprising:

[0006] A first clamping member and a second clamping member are arranged opposite to each other, and the first clamping member and the second clamping member cooperate with each other to clamp the pole ear. At least one of the first clamping member and the second clamping member is provided with a flexible connecting member, and the flexible connecting member is electrically connected to the pole ear. When the distance between the pole ear and the first clamping member or the second clamping member changes, the flexible connecting member maintains electrical connection with the pole ear.

[0007] According to the tab clamp provided by the utility model, the flexible connecting member includes an elastic member, one end of which abuts against the tab;

[0008] The other end of the elastic member is connected to the first clamping member, and when the distance between the pole tab and the first clamping member changes, the elastic member is adapted to be synchronously extended and retracted to maintain contact with the pole tab;

[0009] And / or, the other end of the elastic member is connected to the second clamping member, and when the distance between the pole tab and the second clamping member changes, the elastic member is suitable for synchronous expansion and contraction to maintain contact with the pole tab.

[0010] According to the tab clamp provided by the utility model, the flexible connector further comprises a contact member, which is arranged at one end of the elastic member facing the tab, and is suitable for abutting against the tab.

[0011] According to the tab clamp provided by the utility model, the contact member is provided with a rough surface, and the rough surface is provided at one end of the contact member facing the tab.

[0012] According to the tab clamp provided by the utility model, the elastic member includes at least one of a coil spring and a disc spring.

[0013] According to the tab clamp provided by the utility model, the flexible connector includes a flexible member, one end of which is fixedly connected to the tab;

[0014] The other end of the flexible member is fixedly connected to the first clamping member, the length of the flexible member is not less than the maximum distance between the first clamping member and the pole lug, and when the distance between the pole lug and the first clamping member changes, the flexible member is suitable for synchronously unfolding or folding to maintain electrical connection with the pole lug;

[0015] And / or, the other end of the flexible member is fixedly connected to the second clamping member, the length of the flexible member is not less than the maximum distance between the second clamping member and the pole ear, and when the distance between the pole ear and the second clamping member changes, the flexible member is suitable for synchronously unfolding or folding to maintain electrical connection with the pole ear.

[0016] The tab clamp provided by the utility model further includes a current contact piece, which is arranged on at least one of the first clamping piece and the second clamping piece, and is electrically connected to the tab.

[0017] The pressurized formation equipment provided in the second aspect of the present invention comprises at least two battery core clamps and the tab clamp described in the above embodiment;

[0018] The two adjacent battery cell clamps are used to clamp the battery cell, and the tab clamp is arranged on the battery cell clamp to clamp the tab of the battery cell.

[0019] The pressurized formation equipment provided by the utility model further includes a control component, wherein the control component is connected to the current contact piece, and the control component is used to control the current of the battery core through the current contact piece.

[0020] According to the pressurized formation equipment provided by the utility model, the control component includes a voltage detection module, and the voltage detection module is electrically connected to the flexible connector and is used to detect the voltage of the battery cell.

[0021] The tab clamp provided by the embodiment of the utility model is provided with a flexible connector on at least one of the first clamp and the second clamp, and the first clamp and the second clamp are arranged relative to each other. In this way, during the pressurized formation process, even if the distance between the tab and the first clamp or the second clamp changes, the electrical connection between the tab and the first clamp or the second clamp can still be maintained through the flexible connector, thereby avoiding the disconnection between the tab and the first connector or the second connector. In the process of the control component monitoring the voltage of the battery cell through the tab clamp, the continuous electrical connection between the flexible connector and the tab can ensure the stability of the process of the control component monitoring the voltage of the battery cell.

[0022] Compared with the prior art, the tab clamp provided in the embodiment of the utility model solves the problem of abnormal voltage measurement due to large displacement changes of the voltage contact piece by setting a flexible connecting piece, provides a strong guarantee for the monitoring process of the battery cell voltage, solves the problem that the battery cell pressurization cannot be carried out normally due to such problem, reduces the risk of the battery cell monitoring voltage being too low due to such problem, resulting in overcharging and causing fire, and improves the overall operating efficiency of the battery cell pressurization process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a partial structural schematic diagram of the pressurized chemical forming equipment provided by the embodiment of the utility model;

[0025] Figure 2 It is a structural schematic diagram of a flexible connector provided in an embodiment of the utility model.

[0026] Reference numerals:

[0027] 100: battery cell clamp; 200: battery cell; 210: tab; 300: tab clamp; 310: first clamping member; 320: second clamping member; 330: flexible connecting member; 331: elastic member; 332: contact member; 3320: rough surface; 333: current contact member. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 a mechanical connection or an electrical 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 the embodiments of the present application can be understood according to specific circumstances.

[0030] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0032] With the development of technology, various fields have put forward higher requirements for the battery life of lithium batteries. Under the same mass or volume, the higher the energy density of the lithium battery, the better the battery life will be. The main way to improve the energy density is to optimize the electrochemical system, that is, to optimize the positive and negative electrode materials of the battery cell.

[0033] At present, the most commonly used electrochemical system is low-nickel material or lithium iron phosphate positive electrode + graphite negative electrode. The energy density limit of a single cell in this electrochemical system is 260Wh / Kg. However, this electrochemical system cannot meet the growing battery life requirements of lithium batteries. Relatively speaking, high-nickel positive electrode + silicon-carbon negative electrode has a higher energy density, with a limit of up to 360Wh / Kg, which can better meet the battery life requirements of lithium batteries.

[0034] However, the battery cell with high nickel positive electrode + silicon carbon negative electrode will expand greatly during the charging and discharging process. Therefore, during the formation process of this type of battery cell, it is necessary to apply a certain pressure in the thickness direction of the battery cell to ensure that the battery cell maintains uniform force during the charging and discharging process, and further achieve a close fit inside the battery cell so that the generated gas flows into the reserved air bag.

[0035] During the pressurized formation process of the battery cell, the pressure in the thickness direction of the battery cell is adjusted in real time mainly by adjusting the spacing of the battery cell clamps, and the real-time voltage of the battery cell is monitored through the voltage contact at the tab clamp. In the existing pressurized formation equipment, the tab clamp and the battery cell clamp are in the same mechanism. In the process of adjusting the pressure through the battery cell clamp, the tab clamp will also move with the movement of the battery cell clamp. In this process, since the voltage contact piece will also move with the tab clamp, when the displacement of the voltage contact piece changes greatly, the problem of abnormal voltage measurement often occurs, which in turn causes the battery cell formation to be unable to proceed normally. In addition, when the monitoring voltage of the battery cell is too low due to abnormal measurement, overcharging will occur, and there is a risk of fire.

[0036] Figure 1 It is a partial structural schematic diagram of the pressurized formation equipment provided in the embodiment of the utility model.

[0037] See also Figure 1 The first aspect of the embodiment of the utility model provides a tab clamp 300, which includes a first clamping member 310 and a second clamping member 320 arranged opposite to each other. During the pressurized formation process of the battery cell, the tab 210 of the battery cell 200 is assembled between the first clamping member 310 and the second clamping member 320. The first clamping member 310 and the second clamping member 320 cooperate with each other to clamp the tab 210.

[0038] Continue reading Figure 1A flexible connector 330 is provided on at least one of the first clamp 310 and the second clamp 320. In other words, the flexible connector 330 can be provided only on the first clamp 310 or the second clamp 320, or can be provided on both the first clamp 310 and the second clamp 320. The flexible connector 330 is provided on a side of the first clamp 310 or the second clamp 320 facing the pole lug 210. The flexible connector 330 is electrically connected to the pole lug 210. When the distance between the pole lug 210 and the first clamp 310 or the second clamp 320 changes, the flexible connector 330 is suitable for maintaining electrical connection with the pole lug 210.

[0039] See also Figure 1 It can be understood that the tab clamp 300 provided by the embodiment of the utility model, by setting a flexible connector 330 on at least one of the first clamp 310 and the second clamp 320, and making the first clamp 310 and the second clamp 320 relatively arranged, in this way, during the pressurized formation process, even if the distance between the tab 210 and the first clamp 310 or the second clamp 320 changes, the electrical connection between the tab 210 and the first clamp 310 or the second clamp 320 can still be maintained by the flexible connector 330, thereby avoiding the disconnection phenomenon between the tab 210 and the first connector or the second connector. In the process of the control component monitoring the voltage of the battery cell 200 through the tab clamp 300, based on the continuous electrical connection between the flexible connector 330 and the tab 210, the control component can ensure the stability of the process of voltage monitoring of the battery cell 200.

[0040] Compared with the prior art, the tab clamp 300 provided in the embodiment of the utility model solves the problem of abnormal voltage measurement due to large displacement changes of the voltage contact piece by setting a flexible connector 330, provides a strong guarantee for the voltage monitoring process of the battery cell 200, solves the problem that the pressurized formation of the battery cell 200 cannot proceed normally due to such problem, reduces the risk of the monitored voltage of the battery cell 200 being too low due to such problem, resulting in overcharging and causing fire, and improves the overall operating efficiency of the pressurized formation process of the battery cell 200.

[0041] Figure 2 It is a structural schematic diagram of a flexible connector provided in an embodiment of the utility model.

[0042] See also Figure 1 and Figure 2In an optional embodiment of the utility model, the flexible connector 330 includes an elastic member 331, one end of the elastic member 331 abuts against the pole lug 210, and the other end of the elastic member 331 is fixedly connected to the first clamping member 310. When the spacing between the pole lug 210 and the first clamping member 310 changes, the elastic member 331 is suitable for synchronous expansion and contraction to maintain the abutment between the elastic member 331 and the pole lug 210. In some other optional examples of this embodiment, different from the above examples, the other end of the elastic member 331 is fixedly connected to the second clamping member 320, that is, the elastic member 331 is arranged between the pole lug 210 and the second clamping member 320. When the spacing between the pole lug 210 and the second clamping member 320 changes, the elastic member 331 is suitable for synchronous expansion and contraction to maintain the abutment between the elastic member 331 and the pole lug 210. It should be noted here that the above two examples can exist simultaneously in the optional embodiments of the present invention. In other words, corresponding elastic members 331 are respectively provided between the first clamping member 310 and the pole lug 210 and between the second clamping member 320 and the pole lug 210. Specifically, adaptive selection can be made according to actual conditions.

[0043] When the distance between the pole tab 210 and the first clamping member 310 or the second clamping member 320 does not increase, that is, when the pole tab 210 is clamped by the first clamping member 310 and the second clamping member 320, the elastic member 331 is in a state of self-compression. It is explained here that the aforementioned elastic member 331 is suitable for synchronous expansion and contraction, which means that the length of the elastic member 331 itself is suitable for synchronous change with the distance between the pole tab 210 and the first clamping member 310 or the second clamping member 320, and the free length of the elastic member 331 is not less than the maximum distance between the first clamping member 310 or the second clamping member 320 and the pole tab 210. In other words, when there is no need to apply pressure to the thickness direction of the battery cell 200, that is, when the distance between the first clamping member 310 and the second clamping member 320 is at the maximum state. , the length of the elastic member 331 at this time needs to meet the requirements of the spacing between the first clamping member 310 and the pole lug 210, or the spacing between the second clamping member 320 and the pole lug 210. Specifically, the length of the elastic member 331 disposed between the first clamping member 310 and the pole lug 210 is not less than the spacing between the first clamping member 310 and the pole lug 210 at this time, and the length of the elastic member 331 disposed between the second clamping member 320 and the pole lug 210 is not less than the spacing between the second clamping member 320 and the pole lug 210 at this time. It should also be noted here that other external forces that may affect the "free length" of the elastic member 331 need to be taken into account in the design of the free length of the elastic member to avoid deviations between the theoretical length value of the elastic member and the actual required value due to external factors such as gravity.

[0044] In an optional embodiment of the present invention, the elastic member 331 may include at least one of a coil spring and a butterfly spring. Of course, there are many types of elastic members 331, such as conductive rubber or annular springs, etc. Specifically, it can be adaptively set according to actual conditions.

[0045] See also Figure 1 and Figure 2 It can be understood that in the embodiment of the utility model, by providing the elastic member 331, based on the elasticity of the elastic member 331, in the process of pressurized forming, even if the distance between the pole ear 210 and the first clamping member 310 or the second clamping member 320 changes, the electrical connection between the pole ear 210 and the first clamping member 310 or the second clamping member 320 can be maintained by the elastic member 331, thereby avoiding the problem of disconnection between the pole ear 210 and the first connecting member or the second connecting member.

[0046] Continue reading Figure 1 and Figure 2 In an optional embodiment of the present invention, the flexible member further includes a contact member 332, which is disposed at one end of the elastic member 331 facing the pole ear 210, and the contact member 332 is fixedly connected to the elastic member 331, and the contact member 332 is suitable for contacting the pole ear 210. The shape of the contact member 332 can be a cube, a sphere, a cylinder, etc., and its material can be a conductive material, which can be selected according to the actual situation.

[0047] Continue reading Figure 1 and Figure 2 In an optional embodiment of the present invention, the contact member 332 is provided with a rough surface 3320, and the rough surface 3320 is provided at one end of the contact member 332 facing the tab 210. In other words, when the contact member 332 abuts against the tab 210, the rough surface 3320 is the contact surface of the contact member 332 and the tab 210. Figure 1 and Figure 2 It can be understood that by providing a rough surface 3320 on the contact member 332, the contact area between the contact member 332 and the pole ear 210 can be increased, the resistance can be reduced, and the current can be transferred between the pole ear 210 and the contact member 332. In the process of the control component monitoring the voltage of the battery cell 200 through the pole ear clamp 300, the accuracy of voltage detection can be improved.

[0048] In an optional embodiment of the present utility model, different from the above-mentioned embodiment, the flexible connector 330 includes a flexible member, one end of the flexible member is fixedly connected to the pole lug 210, the other end of the flexible member is fixedly connected to the first clamping member 310, the length of the flexible member is not less than the maximum spacing between the first clamping member 310 and the pole lug 210, and when the spacing between the pole lug 210 and the first clamping member 310 changes, the flexible member is suitable for synchronously unfolding or folding to maintain the electrical connection with the pole lug 210. In an optional example of this embodiment, different from the above-mentioned example, the other end of the flexible member is fixedly connected to the second clamping member 320, the length of the flexible member is not less than the maximum spacing between the second clamping member 320 and the pole lug 210, and when the spacing between the pole lug 210 and the second clamping member 320 changes, the flexible member is suitable for synchronously unfolding or folding to maintain the electrical connection with the pole lug 210. It should be noted here that the above two examples can exist simultaneously in the optional embodiments of the present invention, that is, corresponding flexible parts are respectively provided between the first clamping member 310 and the pole lug 210, and between the second clamping member 320 and the pole lug 210. Specifically, adaptive selection can be made according to actual conditions.

[0049] It should also be noted here that when there is no need to apply pressure to the thickness direction of the battery cell 200, that is, when the distance between the first clamping member 310 and the second clamping member 320 is at the maximum state, the length of the flexible member at this time needs to meet the requirements of the distance between the corresponding first clamping member 310 and the pole lug 210, or the distance between the second clamping member 320 and the pole lug 210. Specifically, the length of the flexible member arranged between the first clamping member 310 and the pole lug 210 is not less than the distance between the first clamping member 310 and the pole lug 210 at this time, and the length of the flexible member arranged between the second clamping member 320 and the pole lug 210 is not less than the distance between the second clamping member 320 and the pole lug 210 at this time.

[0050] There are many types of flexible parts, such as conductive wires and conductive tapes. In some optional embodiments, multiple sheet-mounted parts can be set up to be connected end to end, and any two adjacent sheet-mounted parts can rotate relative to each other. In other words, by setting up multiple sheet-mounted parts, they can form a folding structure similar to a folding fan to meet the needs of unfolding or folding the flexible parts. Specifically, it can be adaptively set according to actual conditions.

[0051] It can be understood that the tab clamp 300 provided in the embodiment of the utility model is provided with a flexible member, based on the characteristics of the flexible member that can be unfolded and folded. In this way, during the pressurized forming process, even if the distance between the tab 210 and the first clamping member 310 or the second clamping member 320 changes, the electrical connection between the tab 210 and the first clamping member 310 or the second clamping member 320 can be maintained by the flexible member, thereby avoiding the disconnection between the tab 210 and the first connector or the second connector.

[0052] See also Figure 1 In an optional embodiment of the present invention, the tab fixture 300 further includes a current contact 333, which is disposed on at least one of the first clamp 310 and the second clamp 320. During the pressurized formation process of the battery cell 200, the current contact 333 is suitable for being electrically connected to the tab 210 to transmit the current of the battery cell 200. The current contact 333 can be configured as a plate-shaped member, a block-shaped member, or a probe, a probe, etc. Specifically, it can be adaptively selected according to actual conditions, and the embodiments of the present invention will not be repeated here.

[0053] See also Figure 1 The second aspect of the utility model provides a pressurized formation device, which includes at least two battery cell clamps 100 and the pole tab clamp 300 described in any of the aforementioned embodiments; two adjacent battery cell clamps 100 are used to clamp the battery cell 200, and the pole tab clamp 300 is arranged at at least one end of the battery cell clamp 100. As mentioned above, the pole tab clamp 300 is used to clamp the pole tab 210 of the battery cell 200.

[0054] See also Figure 1 It can be understood that by setting at least two battery cell clamps 100, during the pressurized formation process of the battery cell 200, by adjusting the spacing between adjacent battery cell clamps 100, the external force on the battery cell 200 in the thickness direction can be adjusted to ensure that the battery cell 200 maintains uniform force during the charging and discharging process, and further achieves a close fit inside the battery cell 200, so that the generated gas flows into the reserved air bag. In this way, the uniformity and sufficiency of the electrode sheet lithium insertion and extraction are achieved, and the solid electrolyte interface film (Solid Electrolyte Interface, SEI) is uniformly and stably formed on the electrode surface, and the occurrence of lithium precipitation, black spots, and deformation of the electrode sheet is avoided. It should be noted here that since the present embodiment includes the pole ear clamp 300 described in any of the aforementioned embodiments, the pressurized formation equipment in the present embodiment also includes the beneficial effects of the pole ear clamp 300 described in any of the aforementioned embodiments. For the beneficial effects of the pole ear clamp 300, please refer to the above description, which will not be repeated here.

[0055] In an optional embodiment of the present invention, the pressurized formation equipment also includes a control component, which is connected to the current contact piece 333. During the pressurized formation of the battery cell 200, the control component can control the current of the battery cell 200 during the charging and discharging process based on the connection with the current contact piece 333. At the same time, the control component can also monitor the current size of the battery cell 200 during the charging and discharging process in real time based on the current contact piece 333.

[0056] In an optional embodiment of the utility model, the control component also includes a voltage detection module, which is electrically connected to the flexible connector 330. During the pressurized formation of the battery cell 200, the voltage detection module can monitor the voltage of the battery cell 200 during the charging and discharging process in real time based on the connection with the flexible connector 330. It can be understood that during the pressurized formation process, even if the distance between the pole ear 210 and the first clamping member 310 or the second clamping member 320 changes, the electrical connection between the pole ear 210 and the first clamping member 310 or the second clamping member 320 is maintained by the flexible connector 330, which can avoid the pole ear 210 and the first connector or the second connector from being disconnected, thereby ensuring the stability of the process of voltage monitoring of the battery cell 200 by the control component.

[0057] Compared with the prior art, the pressurized formation equipment provided by the embodiment of the utility model solves the problem of abnormal voltage measurement due to large displacement changes of the voltage contact piece by providing a flexible connector 330 electrically connected to the voltage detection module, provides a strong guarantee for the monitoring process of the battery cell 200 voltage, solves the problem that the pressurized formation of the battery cell 200 cannot be carried out normally due to such problem, reduces the risk of overcharging and causing fire due to the low monitoring voltage of the battery cell 200, and improves the overall operating efficiency of the pressurized formation of the battery cell 200.

[0058] In an optional embodiment of the utility model, the pressurized formation equipment also includes at least one of a screw system and a telescopic cylinder system, and the screw system and the telescopic cylinder system are used to adjust the spacing between the battery cell clamps 100. Specifically, adaptive design can be performed by referring to the prior art, and the embodiments of the utility model will not be repeated here.

[0059] It should be noted that the technical solutions in various embodiments of the present utility model can be combined with each other, but the basis for the mutual combination is that it can be implemented by ordinary technicians in the field; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist, that is, it does not belong to the protection scope of the present utility model.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A tab fixture, characterized in that: include: A first clamping member (310) and a second clamping member (320) are arranged opposite to each other, and the first clamping member (310) and the second clamping member (320) cooperate with each other to clamp the pole lug (210). At least one of the first clamping member (310) and the second clamping member (320) is provided with a flexible connecting member (330), and the flexible connecting member (330) is electrically connected to the pole lug (210). When the distance between the pole lug (210) and the first clamping member (310) or the second clamping member (320) changes, the flexible connecting member (330) maintains electrical connection with the pole lug (210).

2. The tab fixture according to claim 1, characterized in that: The flexible connecting member (330) comprises an elastic member (331), and one end of the elastic member (331) is in contact with the pole ear (210); The other end of the elastic member (331) is connected to the first clamping member (310), and when the distance between the pole lug (210) and the first clamping member (310) changes, the elastic member (331) is adapted to be synchronously extended and retracted to maintain contact with the pole lug (210); And / or, the other end of the elastic member (331) is connected to the second clamping member (320), and when the distance between the pole lug (210) and the second clamping member (320) changes, the elastic member (331) is suitable for synchronous expansion and contraction to maintain abutment with the pole lug (210).

3. The tab clamp according to claim 2, characterized in that: The flexible connecting member (330) further comprises a contact member (332), wherein the contact member (332) is arranged at one end of the elastic member (331) facing the pole lug (210), and the contact member (332) is suitable for abutting against the pole lug (210).

4. The tab clamp according to claim 3, characterized in that: The contact member (332) is provided with a rough surface (3320), and the rough surface (3320) is provided at one end of the contact member (332) facing the pole ear (210).

5. The tab clamp according to claim 2, characterized in that: The elastic member (331) includes at least one of a coil spring and a disc spring.

6. The tab fixture according to claim 1, characterized in that: The flexible connecting member (330) comprises a flexible member, one end of which is fixedly connected to the pole ear (210); The other end of the flexible member is fixedly connected to the first clamping member (310), the length of the flexible member is not less than the maximum distance between the first clamping member (310) and the pole lug (210), and when the distance between the pole lug (210) and the first clamping member (310) changes, the flexible member is suitable for synchronously unfolding or folding to maintain electrical connection with the pole lug (210); And / or, the other end of the flexible member is fixedly connected to the second clamping member (320), the length of the flexible member is not less than the maximum distance between the second clamping member (320) and the pole lug (210), and when the distance between the pole lug (210) and the second clamping member (320) changes, the flexible member is suitable for synchronously unfolding or folding to maintain electrical connection with the pole lug (210).

7. The tab clamp according to any one of claims 1 to 6, characterized in that: It also includes a current contact piece (333), which is arranged on at least one of the first clamping piece (310) and the second clamping piece (320), and the current contact piece (333) is electrically connected to the pole lug (210).

8. A pressurized chemical forming device, characterized in that: It comprises at least two battery cell clamps (100) and the tab clamp according to claim 7; The two adjacent battery cell clamps (100) are used to clamp the battery cell (200), and the tab clamp is provided on the battery cell clamp (100) and is used to clamp the tab (210) of the battery cell (200).

9. The pressurized chemical formation equipment according to claim 8, characterized in that: It also includes a control component, which is connected to the current contact piece (333), and is used to control the current of the battery core (200) through the current contact piece (333).

10. The pressurized chemical formation equipment according to claim 9, characterized in that: The control component comprises a voltage detection module, which is electrically connected to the flexible connector (330) and is used to detect the voltage of the battery cell (200).

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