Fastening device for cell test fixture clamps

Abstract

This utility model discloses a fastening device for a battery cell testing fixture. The fastening device includes a housing, a power input component, multiple power output components, and a transmission assembly. The power input component is rotatably mounted on the housing, and the multiple power output components are mounted on the housing with adjustable relative positions. The transmission assembly is connected to the power input component and the multiple power output components to transmit the power input from the power input component to the multiple power output components. This fastening device can synchronously drive multiple fasteners on the battery cell testing fixture, ensuring uniform fastening of the battery cell. It is also applicable to various fixtures with different fastener spacings, improving the applicability of the fastening device.

Description

Technical Field

[0001] This utility model relates to the field of fastening devices, and more particularly to a fastening device for a battery cell testing fixture. Background Technology

[0002] Cell testing fixtures play a crucial role in battery manufacturing and application. Cells are the core component of a battery system, and their performance directly impacts the overall battery performance. Cell testing fixtures simulate the constrained state of a single cell within a module or battery pack, ensuring that each cell meets expected performance standards before leaving the factory, guaranteeing battery consistency and reliability. They also provide a layer of physical protection for the cell casing, reducing safety risks during battery testing, such as short circuits, overheating, or arcing. Finally, by ensuring identical testing conditions for each test, the fixture helps obtain repeatable data, which is essential for comparing and analyzing battery performance.

[0003] However, when applying preload to battery cells or modules using tooling fixtures, the torque wrenches we commonly use are mostly single-operation tools, which cannot meet the requirement of simultaneously and evenly tightening multiple bolts. In the tooling assembly process of some large-sized battery cells, there are many bolt points that need to be tightened, so it is even more difficult for a single torque wrench to ensure the uniformity of preload among multiple bolt points, making the operation time-consuming and labor-intensive. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the purpose of this utility model is to propose a fastening device for a battery cell testing fixture. The fastening device can synchronously drive multiple fasteners on the battery cell testing fixture, so that the fixture can fasten the battery cell evenly. It can also be applied to various fixtures with different fastener spacing, thus improving the applicability of the fastening device.

[0006] According to an embodiment of the present invention, the fastening device includes a housing, a power input component, a plurality of power output components, and a transmission assembly. The power input component is rotatably disposed on the housing, and the plurality of power output components are disposed on the housing and their relative positions are adjustable. The transmission assembly is respectively connected to the power input component and the plurality of power output components for transmitting the power input by the power input component to the plurality of power output components.

[0007] According to the fastening device of this utility model embodiment, multiple fasteners on the battery cell testing fixture can be driven synchronously through the fastening device, so that the fixture fastens the battery cell evenly, and it can be applied to various fixtures with different fastener spacing, thereby improving the applicability of the fastening device.

[0008] In addition, the fastening device according to the above embodiments of the present invention may also have the following additional technical features:

[0009] Optionally, the power output component includes a slider and an output shaft. The slider is slidably disposed in the housing, and the output shaft is rotatably connected to the slider and is connected to the transmission assembly.

[0010] Optionally, the transmission assembly includes a first transmission group, a transmission shaft, and a second transmission group. The transmission shaft and the second transmission group correspond to a power output component. The first transmission group is connected to the power input component and the transmission shaft respectively, and is used to transmit the rotational motion of the power input component to the transmission shaft. The second transmission group is connected to the transmission shaft and the corresponding power output component respectively, and is used to transmit the rotational motion of the transmission shaft to the corresponding power output component. The second transmission group is movable along the axial direction of the transmission shaft and is circumferentially limited relative to the transmission shaft.

[0011] Optionally, the first transmission group includes a first transmission gear and a second transmission gear. The first transmission gear is connected to the second transmission gear and the power input component respectively. The second transmission gear is connected to the transmission shaft. The axis of the second transmission gear has an angle of not less than 0° with the axis of the first transmission gear, which is used to change the transmission direction of the power input component.

[0012] Optionally, the second transmission group includes a third transmission gear and a fourth transmission gear. The third transmission gear is movable along the axial direction of the transmission shaft and is circumferentially limited relative to the transmission shaft. The fourth transmission gear is connected to the third transmission gear and the power output component respectively. The axis of the fourth transmission gear has an angle of not less than 0° with the axis of the third transmission gear, which is used to change the transmission direction of the transmission shaft.

[0013] Optionally, the housing is provided with a slide rail and a slide groove, the slider is slidably engaged with the slide rail, the slide groove extends in the same direction as the slide rail, the output shaft passes through the slide groove and can move along the slide groove.

[0014] Optionally, the slide rail includes a first slide rail and a second slide rail, which are arranged side by side. The slide groove is disposed between the first slide rail and the second slide rail. The slider has a first sliding part and a second sliding part, wherein the first sliding part is slidably engaged with the first slide rail, and the second sliding part is slidably engaged with the second slide rail.

[0015] Optionally, the plurality of power output elements are distributed along a direction surrounding the power input element and are movable along directions toward and away from the power input element.

[0016] Optionally, the rotation center axis of the power input component is arranged perpendicular to the axis of the transmission shaft.

[0017] Optionally, the housing includes a first housing portion and a second housing portion, which are joined together to form the housing and are detachable.

[0018] Optionally, the power input includes an input shaft.

[0019] Optionally, the fastening device further includes a reset member, which connects the second transmission gear and the third transmission gear and has an elastic force that drives the third transmission gear to mesh with the fourth transmission gear.

[0020] Optionally, the outer circumferential surface of the drive shaft is provided with a limiting boss, the limiting boss extends along the axial direction of the drive shaft, and the inner circumferential surface of the third drive gear is provided with a limiting groove, the limiting groove engaging with the limiting boss to circumferentially limit the drive shaft and the third drive gear. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the fastening device in some embodiments of this utility model.

[0022] Figure 2 This is a front view of the fastening device in some embodiments of this utility model.

[0023] Figure 3 This is a top view of the fastening device in some embodiments of this utility model.

[0024] Figure 4 yes Figure 3 Cross-sectional view of an embodiment.

[0025] Figure 5 This is a side view of the fastening device in some embodiments of this utility model.

[0026] Figure 6 yes Figure 5 Cross-sectional view of an embodiment.

[0027] Figure label:

[0028] Fastening device 100, housing 10, first housing part 11, second housing part 12, slide rail 121, slide groove 122, input shaft 20, slider 30, output shaft 40, transmission assembly 50, first transmission group 51, first transmission gear 511, second transmission gear 512, transmission shaft 52, second transmission group 53, third transmission gear 531, fourth transmission gear 532, first direction AA. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] This utility model proposes a fastening device 100 for a battery cell testing fixture. The fastening device 100 can synchronously drive multiple fasteners on the battery cell testing fixture, so that the fixture is uniformly fastened to the battery cell. It is also applicable to various fixtures with different fastener spacing, thus improving the applicability of the fastening device 100.

[0031] Reference Figures 1 to 6 According to the embodiment of the present utility model, the fastening device 100 includes a housing 10, a power input component, a plurality of power output components, and a transmission assembly 50.

[0032] The power input component is rotatably mounted on the housing 10, and multiple power output components are mounted on the housing 10 with adjustable relative positions. The transmission assembly 50 is connected to the power input component and the multiple power output components respectively, and is used to transmit the power input by the power input component to the multiple power output components. With this configuration, the fastening device 100 can synchronously drive multiple fasteners on the battery cell testing fixture, so that the fixture can fasten the battery cell evenly, and it can be applied to various fixtures with different fastener spacing, thus improving the applicability of the fastening device 100.

[0033] For example, the fastening device 100 of this utility model embodiment can be applied to the tooling fixture for battery cell testing. Of course, depending on the actual situation, the fastening device 100 can also be applied to other tooling fixtures.

[0034] Working principle of fastening device 100:

[0035] Technicians can input power into the power input component, which transmits the power to multiple power output components via the transmission assembly 50. Each power output component can be connected to a sleeve, which in turn can be connected to a nut on a tooling fixture. This allows technicians to simultaneously tighten multiple nuts on the tooling fixture using the power input component, facilitating the uniform application of pressure to the battery cell. This simulates the confined and tightly fitted state of the battery cell within a module or battery pack, thereby detecting the cell's performance. Furthermore, for tooling fixtures of different sizes and specifications, which have multiple nuts with varying spacing, the relative positions of the multiple power output components can be adjusted to ensure a one-to-one correspondence between each component and nut, improving the applicability of the fastening device 100.

[0036] In some specific examples, part of the power input component is located inside the housing 10 and another part is located outside the housing 10; part of the power output component is located inside the housing 10 and another part is located outside the housing 10; and the transmission assembly 50 is located inside the housing 10. The housing 10 can protect the power input component, the power output component, and the transmission assembly 50, reducing the impact of the external environment on the fastening device 100. The part of the power input component located outside the housing 10 can be used for transmission connection with the power source, and the part of the power output component located outside the housing 10 can be used for connection with the sleeve.

[0037] In some embodiments of this utility model, the power output component is slidably connected to the housing 10, so that multiple power output components slide relative to the housing 10, making the relative position between the multiple power output components adjustable, thereby improving the applicability of the fastening device 100.

[0038] Furthermore, referring to Figures 1 to 6 The power output component includes a slider 30 and an output shaft 40. The slider 30 is slidably disposed on the housing 10. The output shaft 40 is rotatably connected to the slider 30 and is connected to the transmission assembly 50. It can be understood that the slider 30 slides relative to the housing 10, and the output shaft 40 slides on the housing 10 with the help of the slider 30. This can reduce the relative friction between the output shaft 40 and the housing 10, avoid damage to the structure of the output shaft 40, ensure the power transmission of the output shaft 40, and improve the working stability of the fastening device 100.

[0039] Of course, the power input may include the input shaft 20.

[0040] Reference Figure 1 , Figure 4 and Figure 6 In some embodiments of this utility model, the transmission assembly 50 includes a first transmission group 51, a transmission shaft 52, and a second transmission group 53.

[0041] In this configuration, the drive shaft 52 and the second transmission group 53 correspond to one of a plurality of power output components. The first transmission group 51 is connected to the power input component and the drive shaft 52 respectively, and is used to transmit the rotational motion of the power input component to the drive shaft 52. The second transmission group 53 is connected to the drive shaft 52 and the corresponding power output component respectively, and is used to transmit the rotational motion of the drive shaft 52 to the corresponding power output component. In this way, the transmission assembly 50 can transmit the power of the power input component to the power output component, and facilitates the position adjustment of the power output component, thereby improving the applicability of the fastening device 100.

[0042] For example, during operation, the power input component can be connected to a power source, which drives the power input component to rotate around its axis. The first transmission group 51 transmits the rotational motion of the power input component to the transmission shaft 52, and the second transmission group 53 transmits the rotational motion of the transmission shaft 52 to the power output component, allowing the power output component to rotate around its own axis, thereby tightening the nuts on the tooling fixture. It is understood that there may be multiple transmission shafts 52 and multiple second transmission groups 53. The multiple transmission shafts 52, multiple second transmission groups 53, and multiple power output components correspond one-to-one, which facilitates the transmission of the rotational motion of the power input component to multiple power output components. Multiple nuts on the tooling fixture can be tightened simultaneously through multiple power input components, improving the uniformity of tightening.

[0043] In addition, the second transmission group 53 is movable along the axial direction of the transmission shaft 52 and is circumferentially limited relative to the transmission shaft 52. When it is necessary to adjust the relative position of the power output component, the output shaft 40 can be driven so that the output shaft 40 moves relative to the housing 10 through the slider 30. The second transmission group 53 can move with the output shaft 40 and slide relative to the transmission shaft 52. In this way, the second transmission group 53 can maintain the transmission connection with the transmission shaft 52 and the output shaft 40, realize the position adjustment of the output shaft 40 on the basis of transmission, and the transmission shaft 52 can provide guidance for the sliding of the output shaft 40, improving the stability of the adjustment.

[0044] Reference Figures 1 to 6 Both the input shaft 20 and the output shaft 40 extend along a first direction, and multiple power output components are slidable along a second direction. The first direction is perpendicular to the second direction. The first transmission group 51 changes the rotational direction of the power input component, which facilitates the movement of the second transmission group 53 relative to the first transmission group 51, thereby adjusting the position of the power output component. The second transmission group 53 then changes the rotational direction of the power input component again, keeping its rotational direction in its initial state, which facilitates the consistency of power transmission and improves the operational reliability of the fastening device 100. For ease of description, unless otherwise specified, the following embodiments are described in conjunction with the aforementioned orientation. Of course, the technical solution of this embodiment achieved by changing the orientation is still within the protection scope of this utility model.

[0045] Reference Figure 4 and Figure 6In some embodiments of this utility model, the first transmission group 51 includes a first transmission gear 511 and a second transmission gear 512. The first transmission gear 511 is connected to the second transmission gear 512 and the power input component respectively. The second transmission gear 512 is connected to the transmission shaft 52. The axis of the second transmission gear 512 has an angle of not less than 0° with the axis of the first transmission gear 511, which is used to change the transmission direction of the power input component. For example, the axis of the second transmission gear 512 extends along a second direction, and the axis of the first transmission gear 511 extends along a first direction, that is, the axis of the second transmission gear 512 has an angle of 90° with the axis of the first transmission gear 511. This arrangement can change the transmission direction of the rotational motion of the power input component, so that the rotational motion direction of the transmission shaft 52 is different from the rotational motion direction of the power input component, which facilitates the movement of the second transmission group 53 along the axis of the transmission shaft 52. During the movement, it does not affect the first transmission group 51 from transmitting the power of the power input component to the transmission shaft 52, thereby improving the operational stability of the fastening device 100.

[0046] Reference Figure 4 and Figure 6 In some embodiments of this utility model, the second transmission group 53 includes a third transmission gear 531 and a fourth transmission gear 532. The third transmission gear 531 is axially movable along the transmission shaft 52 and circumferentially limited relative to the transmission shaft 52. The fourth transmission gear 532 is connected to the third transmission gear 531 and the power output component respectively. The axis of the fourth transmission gear 532 has an angle of not less than 0° with the axis of the third transmission gear 531, which is used to change the transmission direction of the transmission shaft 52. Exemplarily, the axis of the third transmission gear 531 extends along a second direction, and the axis of the fourth transmission gear 532 extends along a first direction. Extending inward, the axis of the third transmission gear 531 forms a 90° angle with the axis of the third transmission gear 531. This arrangement changes the transmission direction of the rotational motion of the transmission shaft 52, making the rotational motion direction of the transmission shaft 52 different from that of the power output component, and making the rotational motion direction of the power input component the same as that of the power output component. This ensures the consistency of power transmission, improves the operational reliability of the fastening device 100, and facilitates the movement of the third transmission gear 531 along the axis of the transmission shaft 52 without affecting the power transmission of the transmission assembly 50, thereby realizing the position adjustment of the power output component.

[0047] Reference Figure 1 , Figure 3 , Figure 4 and Figure 6In some embodiments of this utility model, the housing 10 is provided with a slide rail 121 and a slide groove 122. The slider 30 is slidably engaged with the slide rail 121. The slide groove 122 extends in the same direction as the slide rail 121. The output shaft 40 passes through the slide groove 122 and can move along the slide groove 122. In this way, the movement stability of the power output component can be improved and the working performance of the fastening device 100 can be improved.

[0048] It is understood that the housing 10 is provided with a slide rail 121, and the slider 30 slides in cooperation with the slide rail 121. The slider 30 extends in the same direction as the slide groove 122. The slide rail 121 guides the slider 30 to move in the second direction, so that the second transmission group 53 moves in the second direction relative to the first transmission group 51. The corresponding power output component also moves in the second direction, which improves the stability of the position adjustment of the power output component and ensures the stable transmission of power when the power output component is adjusted.

[0049] In addition, the slider 30 is disposed inside the housing 10, one end of the output shaft 40 is rotatably connected to the slider 30, and the other end passes through the slide groove 122 and extends out of the slide groove 122 to connect to the sleeve outside the housing 10, thereby driving the battery testing fixture.

[0050] Reference Figure 6 In some embodiments of this utility model, the slide rail 121 includes a first slide rail 121 and a second slide rail 121, which are arranged side by side. The slide groove 122 is provided between the first slide rail 121 and the second slide rail 121. The slider 30 has a first sliding part and a second sliding part. The first sliding part is slidably engaged with the first slide rail 121, and the second sliding part is slidably engaged with the second slide rail 121. Specifically, the slider 30 is arranged across the slide groove 122, which facilitates the sliding engagement of the first sliding part of the slider 30 with the first slide rail 121 and the sliding engagement of the second sliding part with the second slide rail 121. In this way, the movement stability of the power output component can be further improved, and the working performance of the fastening device 100 can be improved.

[0051] Reference Figures 1 to 6 In some embodiments of this utility model, multiple power output components are distributed along the direction surrounding the power input component and are movable along the direction of approaching and moving away from the power input component; in this way, the uniformity of power transmission can be improved, thereby improving the working performance of the fastening device 100.

[0052] Specifically, the power input component is connected to the first transmission group 51, and the second transmission group 53 includes multiple second transmission groups 53 distributed along the direction surrounding the power input component. Multiple power output components are also distributed along the direction surrounding the power input component. The multiple second transmission groups 53 are connected to the multiple power input components one by one, and the multiple second transmission groups 53 can be connected to one of the first transmission groups 51. In this way, the power input component can transmit power evenly to the multiple power output components through the first transmission group 51, so that the multiple power output components can evenly apply preload to the battery cell testing fixture to achieve clamping of the battery cell.

[0053] In addition, the axis of the drive shaft 52 can be made to have an angle of not less than 0° with the axis of the power input component, that is, the direction of power transmission can be changed by the first transmission group 51 to ensure the position adjustment of the power output component and the stability of power transmission. In this way, multiple power output components can move in the direction of approaching and moving away from the power input component to realize the position adjustment of the power output component.

[0054] More preferably, the rotation center axis of the power input component is set perpendicular to the axis of the transmission shaft 52; it can be understood that the power input component includes an input shaft 20, the axis of the input shaft 20 extends along a first direction, and the axis of the transmission shaft 52 extends along a second direction, the first direction and the second direction are perpendicular to each other, so as to facilitate the movement of the second transmission group 53 relative to the first transmission group 51, thereby realizing the position adjustment of the power output component.

[0055] Reference Figures 1 to 6 In some embodiments of this utility model, the housing 10 includes a first housing portion 11 and a second housing portion 12, which are joined together to form the housing 10 and are detachable; thus, the position of the power output component can be easily adjusted, and the applicability of the fastening device 100 can be improved.

[0056] For example, the first transmission assembly 51, the transmission shaft 52, and the second transmission assembly 53 are disposed inside the first housing 11. Under normal circumstances, the second housing 10 is connected to the first housing 11, thereby housing the first transmission assembly 51, the transmission shaft 52, and the second transmission assembly 53 inside the housing 10. When it is necessary to adjust the position of the power output component, the second housing 12 can be removed from the first housing 11, and the third transmission gear 531, the fourth transmission gear 532, and the slider 30 can be manually driven to move in the second direction to realize the position adjustment of the power output component. After the adjustment is completed, the second housing 12 can be reconnected to the first housing 11.

[0057] Reference Figures 1 to 6In some embodiments of this utility model, the power input component includes an input shaft 20, which can be connected to a power source for fastening the tooling fixture by the fastening device 100. Optionally, the power source is a drive component, which can be disposed inside the housing 10 and connected to the input shaft 20 for fastening the fastening device 100. Alternatively, one end of the input shaft 20 can be disposed inside the housing 10 and connected to the first transmission group 51 for fastening, while the other end can extend outside the housing 10. The drive component can be disposed outside the housing 10 and connected to the input shaft 20 for fastening the fastening device 100. Optionally, the power source is manually driven by a technician. One end of the input shaft 20 is disposed inside the housing 10 and connected to the first transmission group 51 for fastening, while the other end can extend outside the housing 10. The technician can use a wrench to drive the other end of the input shaft 20 to rotate, thereby fastening the fastening device 100.

[0058] In some embodiments of this utility model, the outer peripheral surface of the transmission shaft 52 is provided with a limiting boss, which extends axially out of the transmission shaft 52. The inner peripheral surface of the third transmission gear 531 is provided with a limiting groove, which engages with the limiting boss to circumferentially limit the transmission shaft 52 and the third transmission gear 531. In this way, the third transmission gear 531 can move axially along the transmission shaft 52 and is circumferentially limited relative to the transmission shaft 52. This facilitates the adjustment of the position of the power output component while ensuring stable power transmission between the power input component and the power output component.

[0059] Furthermore, the limiting bosses include multiple ones distributed circumferentially along the drive shaft 52, and the limiting grooves include multiple ones distributed circumferentially along the third drive gear 531. The multiple limiting bosses and multiple limiting grooves are engaged one-to-one to achieve circumferential limiting between the third drive gear 531 and the drive shaft 52, and to allow the third drive gear 531 to move axially along the drive shaft 52. In some specific examples, four limiting bosses are included, making the cross-sectional shape of the drive shaft 52 along its own axial direction cross-shaped. Four limiting grooves are included, each corresponding to one of the four limiting bosses, so that the power of the drive shaft 52 can be evenly transmitted to the third drive gear 531, improving the operational stability of the fastening device 100.

[0060] In some embodiments of this utility model, the fastening device 100 further includes a reset member, which connects the second transmission gear 512 and the third transmission gear 531 and has an elastic force to drive the third transmission gear 531 and the fourth transmission gear 532 to mesh. With this configuration, when the third transmission gear 531 moves axially along the transmission shaft 52 and the fourth transmission gear 532 moves with the slider 30, the third transmission gear 531 and the fourth transmission gear 532 can still maintain transmission meshing. That is to say, before, during and after the adjustment process of the power output member, the power input member can still transmit power to the power output member, ensuring the normal operation of the fastening device 100.

[0061] In the first example of this utility model, the third transmission gear 531 has one side close to the first transmission group 51 and another side away from the first transmission group 51. The fourth transmission gear 532 is connected to the other side of the third transmission gear 531 away from the first transmission group 51. The reset member connects the second transmission gear 512 and the third transmission gear 531 and has an elastic force that drives the third transmission gear 531 to approach the fourth transmission gear 532. During the adjustment process, the fourth transmission gear 532 can be driven by the technician to move away from the third transmission gear 531. During this process, the third transmission gear 531 always maintains engagement with the fourth transmission gear 532 under the drive of the reset member, ensuring that the power transmission between the power input member and the power output member is not interrupted. In this way, before, during and after the adjustment process of the power output member, the power input member can still transmit power to the power output member, ensuring the normal operation of the fastening device 100.

[0062] In this example, the reset member can abut against the second transmission gear 512 and the third transmission gear 531 respectively. In this way, the reset member can stably apply an elastic driving force to the third transmission gear 531 without being affected by the rotation of the second transmission gear 512 and the third transmission gear 531.

[0063] In the second example of this utility model, the third transmission gear 531 has one side close to the first transmission group 51 and another side away from the first transmission group 51. The fourth transmission gear 532 is connected to the side of the third transmission gear 531 close to the first transmission group 51. The reset member connects the second transmission gear 512 and the third transmission gear 531 and has an elastic force that drives the third transmission gear 531 to approach the fourth transmission gear 532. During the adjustment process, the fourth transmission gear 532 can be driven by the technician to move away from the third transmission gear 531. During this process, the third transmission gear 531 always maintains engagement with the fourth transmission gear 532 under the drive of the reset member, ensuring that the power transmission between the power input member and the power output member is not interrupted. In this way, before, during and after the adjustment process of the power output member, the power input member can still transmit power to the power output member, ensuring the normal operation of the fastening device 100.

[0064] In this example, the reset member can be fixedly connected to the second transmission gear 512 and the third transmission gear 531 respectively. In this way, the reset member can rotate synchronously with the second transmission gear 512 and the third transmission gear 531, and stably apply an elastic driving force to the third transmission gear 531.

[0065] Based on the first example described above, the specific working principle of the fastening device 100 is as follows:

[0066] Technicians use a wrench to drive the input shaft 20 to rotate, thereby driving the first transmission gear 511 to rotate. The axis of the first transmission gear 511 is perpendicular to the axis of the second transmission gear 512, thus changing the transmission direction. The rotation of the second transmission gear 512 drives the transmission shaft 52 to rotate. The transmission shaft 52 is circumferentially limited by the third transmission gear 531, thereby driving the third transmission gear 531 to rotate circumferentially. The axis of the third transmission gear 531 is perpendicular to the axis of the fourth transmission gear 532, thus changing the transmission direction. The fourth transmission gear 532 is connected to the output shaft 40. The rotation of the fourth transmission gear 532 drives the output shaft 40 to rotate, thereby transmitting the rotational motion of the input shaft 20 to the rotational motion of the output shaft 40, and achieving the tightening of the tooling fixture through the output shaft 40.

[0067] It is understandable that the first transmission gear 511 and the second transmission gear 512 are connected to form an L-shaped structure, and the third transmission gear 531 and the fourth transmission gear 532 are connected to form an L-shaped structure. In this way, the transmission direction of the input shaft 20 can be changed twice. When the second transmission group 53 and the power output component are adjusted, the transmission between the first transmission group 51 and the second transmission group 53 is not affected, and the rotational motion of the power input component and the power output component is made similar, so as to improve the stability of power transmission.

[0068] Furthermore, when the power output component is adjusted, the technician can drive the output shaft 40 to move along the second direction, thereby driving the fourth transmission gear 532 to move along the second direction. Under the drive of the reset component, the third transmission gear 531 can still maintain engagement with the fourth transmission gear 532, so that the power transmission between the input shaft 20 and the output shaft 40 remains stable, thereby improving the fastening efficiency of the fastening device 100.

[0069] This utility model provides a tool (i.e., fastening device 100) for applying pre-tightening force to a single battery or module testing fixture, mainly used to solve the problems of low efficiency and poor uniformity in applying pre-tightening force to existing battery fixtures.

[0070] Specifically, the fastening device 100 includes a housing 10 and an internal gear (i.e., a transmission assembly 50). The first housing 11 has an input shaft 20 connected to the internal first transmission gear 511. The input shaft 20 is connected to the sleeve of a torque wrench, and torque can be output through the input shaft 20. The second housing 12 has multiple output shafts 40, which are respectively connected to the corresponding fourth transmission gears 532. After connecting the sleeve, the nuts of the tooling can be tightened simultaneously. The torque is transmitted by the transmission structure of the internal gear, thereby tightening the nuts of the tooling fixture until the first transmission gear 511 reaches the target setting value and stops applying preload. In this way, multiple bolts can be tightened simultaneously, saving 75% of the time, while ensuring the uniformity of preload among multiple bolt points.

[0071] Furthermore, the housing 10 can protect the structural safety of the internal gears, strengthen the compressive strength, and provide insulation and corrosion resistance. When a preload is applied to the first transmission gear 511, several transmission gears can simultaneously and evenly apply the preload to each bolt point, providing guidance for the design of battery cell testing fixtures.

[0072] Furthermore, the tool's built-in gear structure allows for adjustable spacing of the tooling bolts based on the size of the sample being tested, making it compatible with different sizes, such as... Figure 1 , Figure 4 and Figure 6 As shown, the slider 30 can slide along the slide rail 121 and can be translated to adjust the spacing in order to achieve the purpose of applying preload to the tooling of battery cells of different sizes.

[0073] In some specific examples, the thickness of the housing 10 is between 5mm and 100mm, the length is between 20mm and 1000mm, and the width is between 20mm and 500mm. Meanwhile, the gear structure is combined and matched according to the tooling size requirements, and can include multi-layer gears, gears of various specifications, etc. This tool needs to be used in conjunction with an external torque wrench. Its function is to apply preload to the drive wheel. The magnitude of the preload torque needs to be calculated according to the specifications and dimensions of the gear to achieve the final required torque value.

[0074] Furthermore, the material of the fastening device 100 is not limited to aluminum, steel, or thermosetting resins such as phenolic resin. Additionally, the tooling fixture is connected by bolts.

[0075] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0076] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fastening device for a battery cell testing fixture, characterized in that, include: Shell (10); A power input component, which is rotatably mounted on the housing (10); Multiple power output components are disposed in the housing (10) and their relative positions are adjustable; A transmission assembly (50) is connected to the power input component and the plurality of power output components respectively, and is used to transmit the power input by the power input component to the plurality of power output components.

2. The fastening device according to claim 1, characterized in that, The power output component includes a slider (30) and an output shaft (40). The slider (30) is slidably disposed on the housing (10). The output shaft (40) is rotatably connected to the slider (30) and is connected to the transmission assembly (50) in a transmission manner.

3. The fastening device according to claim 2, characterized in that, The transmission assembly (50) includes a first transmission group (51), a transmission shaft (52), and a second transmission group (53). The transmission shaft (52) and the second transmission group (53) correspond to a power output component. The first transmission group (51) is connected to the power input component and the transmission shaft (52) respectively, and is used to transmit the rotational motion of the power input component to the transmission shaft (52). The second transmission group (53) is connected to the transmission shaft (52) and the corresponding power output component respectively, and is used to transmit the rotational motion of the transmission shaft (52) to the corresponding power output component. The second transmission assembly (53) is axially movable along the transmission shaft (52) and circumferentially limited relative to the transmission shaft (52).

4. The fastening device according to claim 3, characterized in that, The first transmission group (51) includes a first transmission gear (511) and a second transmission gear (512). The first transmission gear (511) is connected to the second transmission gear (512) and the power input component respectively. The second transmission gear (512) is connected to the transmission shaft (52). The axis of the second transmission gear (512) has an angle of not less than 0° with the axis of the first transmission gear (511) to change the transmission direction of the power input component.

5. The fastening device according to claim 4, characterized in that, The second transmission group (53) includes a third transmission gear (531) and a fourth transmission gear (532). The third transmission gear (531) is movable along the axial direction of the transmission shaft (52) and is circumferentially limited relative to the transmission shaft (52). The fourth transmission gear (532) is connected to the third transmission gear (531) and the power output component respectively. The axis of the fourth transmission gear (532) has an angle of not less than 0° with the axis of the third transmission gear (531) to change the transmission direction of the transmission shaft (52).

6. The fastening device according to claim 2, characterized in that, The housing (10) is provided with a slide rail (121) and a slide groove (122). The slider (30) is slidably engaged with the slide rail (121). The slide groove (122) extends in the same direction as the slide rail (121). The output shaft (40) passes through the slide groove (122) and can move along the slide groove (122).

7. The fastening device according to claim 6, characterized in that, The slide rail (121) includes a first slide rail (121) and a second slide rail (121), which are arranged side by side. The slide groove (122) is provided between the first slide rail (121) and the second slide rail (121). The slider (30) has a first sliding part and a second sliding part. The first sliding part is slidably engaged with the first slide rail (121), and the second sliding part is slidably engaged with the second slide rail (121).

8. The fastening device according to claim 3, characterized in that, The plurality of power output elements are distributed along the direction surrounding the power input element and are movable along the direction of approaching and moving away from the power input element; And / or, the rotation center axis of the power input is perpendicular to the axis of the transmission shaft (52).

9. The fastening device according to claim 1, characterized in that, The housing (10) includes a first housing portion (11) and a second housing portion (12), the first housing portion (11) and the second housing portion (12) are joined to form the housing (10), and are detachable; And / or, the power input includes an input shaft (20).

10. The fastening device according to claim 5, characterized in that, It also includes a reset member, which connects the second transmission gear (512) and the third transmission gear (531) and has an elastic force that drives the third transmission gear (531) to mesh with the fourth transmission gear (532); And / or, the outer peripheral surface of the drive shaft (52) is provided with a limiting boss, the limiting boss extends along the axial direction of the drive shaft (52), and the inner peripheral surface of the third drive gear (531) is provided with a limiting groove, the limiting groove and the limiting boss are engaged to limit the drive shaft (52) and the third drive gear (531) circumferentially.

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