Limiting tool for stack assembly

Abstract

The embodiment of the invention provides a limiting tool for galvanic pile assembly. The limiting tool comprises a basic frame and a shear fork type support, the transverse distance of the basic frame is adjustable so that the basic frame can be clamped on the periphery of a pole plate of a galvanic pile, and the basic frame comprises a first basic frame and a second basic frame which can be relatively close to each other and relatively far away from each other; the first base frame and the second base frame are provided with a first shear fork type support and a second shear fork type support which are arranged at intervals in the transverse direction, and the first shear fork type support and the second shear fork type support are used for being clamped at the two transverse ends of a polar plate between the first base frame and the second base frame. According to the limiting tool for galvanic pile assembly, all polar plates of a galvanic pile are limited through the first basic frame, the second basic frame, the first shear fork type support and the second shear fork type support when the galvanic pile is assembled, so that the stacking consistency of the galvanic pile is ensured, meanwhile, the structure of an end plate of the galvanic pile can be prevented from being damaged, and the assembly efficiency of the galvanic pile is improved. And the structural strength of the end plate is ensured.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a position limiting tool for battery stack assembly. Background Art

[0002] The fuel cell stack includes end plates and pole plates and membrane electrodes alternately stacked between the end plates. In order to ensure the consistency of the stack, it is necessary to use a limiting fixture to limit the stacked pole plates during the assembly of the stack. In the related art, the limiting fixture is provided with multiple guide devices on the base, the stack is assembled in the space surrounded by the base and multiple guide devices, and the pole plates are limited by multiple guide devices. However, since the size of the pole plates and membrane electrodes is smaller than that of the end plates, it is necessary to provide avoidance grooves corresponding to the guide devices on the end plates, resulting in that the limiting fixture in the related art can only be used for the corresponding model of the stack, and cannot be applied to multiple models of stacks. At the same time, the avoidance grooves provided on the end plates will also reduce the structural strength of the end plates. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a position limiting tool for assembling a battery stack.

[0005] The limiting tool for assembling a battery stack according to an embodiment of the present invention comprises:

[0006] A base frame, wherein the lateral distance of the base frame is adjustable so that the base frame can be clamped on the periphery of the electrode plate of the battery stack, and the base frame comprises a first base frame and a second base frame arranged at intervals, and the first base frame and the second base frame can be relatively close to or relatively far from each other;

[0007] A scissors-type bracket, the scissors-type bracket comprising a first scissors-type bracket and a second scissors-type bracket, the first scissors-type bracket being connected between one lateral end of the first base frame and one lateral end of the second base frame, and being used for abutting one lateral end of the pole plate located between the first base frame and the second base frame, the second scissors-type bracket being connected between the other lateral end of the first base frame and the other lateral end of the second base frame, and being used for abutting the other lateral end of the pole plate located between the first base frame and the second base frame.

[0008] The limiting fixture for assembling a battery stack according to an embodiment of the present invention has an adjustable lateral distance of the base frame so that it can be clamped on the periphery of the electrode plate of the battery stack. A first scissor-type bracket and a second scissor-type bracket arranged along the lateral interval are provided between the first base frame and the second base frame. The first scissor-type bracket and the second scissor-type bracket are used to clamp the lateral ends of the electrode plate between the first base frame and the second base frame. The first base frame and the second base frame can be relatively close to and relatively far away from each other during the press-fitting of the battery stack, and drive the first scissor-type bracket and the second scissor-type bracket to deform, so that all the electrode plates of the battery stack are limited by the first base frame, the second base frame, the first scissor-type bracket and the second scissor-type bracket during the assembly of the battery stack to ensure the consistency of the stacking of the battery stack. At the same time, the limiting fixture for assembling a battery stack according to an embodiment of the present invention is arranged on the outside of the electrode plate of the battery stack when in use, so it is arranged between the two end plates of the battery stack, so as to avoid damaging the structure of the end plates of the battery stack to ensure the structural strength of the end plates.

[0009] In some embodiments, the first basic frame is used to abut against one end of a first end plate of the stack where a polar plate is provided, and the second basic frame is used to abut against one end of a second end plate of the stack where a polar plate is provided.

[0010] In some embodiments, the base frame includes a transverse extension member and a longitudinal extension member, the transverse extension member includes a first transverse extension member and a second transverse extension member arranged at intervals along the longitudinal direction, the longitudinal extension member includes a first longitudinal extension member and a second longitudinal extension member arranged at intervals along the transverse direction, the first transverse extension member connects one longitudinal end of the first longitudinal extension member and one longitudinal end of the second longitudinal extension member, the second transverse extension member connects the other longitudinal end of the first longitudinal extension member and the other longitudinal end of the second longitudinal extension member, the first transverse extension member and the second transverse extension member can drive the first longitudinal extension member and the second longitudinal extension member to be relatively close and / or relatively far away so that the first longitudinal extension member and the second longitudinal extension member can clamp the pole plate, the first longitudinal extension member is connected to the first scissors-type bracket, and the second longitudinal extension member is connected to the second scissors-type bracket.

[0011] In some embodiments, the lengths of the first transverse extension member and the second transverse extension member are constant, one longitudinal end of the first longitudinal extension member and one longitudinal end of the second longitudinal extension member can be movably disposed on the first transverse extension member along the transverse direction, and the other longitudinal end of the first longitudinal extension member and the other longitudinal end of the second longitudinal extension member can be movably disposed on the second transverse extension member along the transverse direction.

[0012] In some embodiments, the first lateral extension member and the second lateral extension member are lead screws having a first thread segment and a second thread segment arranged in opposite thread directions, the first thread segment being threadedly connected to the first longitudinal extension member, and the second thread segment being threadedly connected to the second longitudinal extension member, so that the first longitudinal extension member and the second longitudinal extension member are driven to move relatively closer and relatively farther apart by rotating the lead screw.

[0013] In some embodiments, the lengths of the first transverse extending member and the second transverse extending member are retractable, and the first transverse extending member and the second transverse extending member are both connected between the first longitudinal extending member and the second longitudinal extending member.

[0014] In some embodiments, the first lateral extension member and the second lateral extension member are springs, or the first lateral extension member and the second lateral extension member are telescopic rods.

[0015] In some embodiments, the scissors-type bracket includes a first limiting rod group and a second limiting rod group, the middle portion of the first limiting rod group is pivotally connected to the middle portion of the second limiting rod group, the first end of the first limiting rod group and the first end of the second limiting rod group are both pivotally connected to the longitudinal extension member of the first base frame, and can be moved longitudinally relative to the longitudinal extension member of the first base frame, the second end of the first limiting rod group and the second end of the second limiting rod group are both pivotally connected to the longitudinal extension member of the second base frame, and can be moved longitudinally relative to the longitudinal extension member of the second base frame, and the first limiting rod group and the second limiting rod group are both used to abut the pole plate.

[0016] In some embodiments, the longitudinal extension member includes a limiting beam, a first slider and a second slider, the limiting beam is used to abut the pole plate, the first slider and the second slider are both arranged on the limiting beam and can move longitudinally relative to the limiting beam, the first slider is pivotally connected to the end of the first limiting rod group, and the second slider is pivotally connected to the end of the second limiting rod group.

[0017] In some embodiments, the longitudinal extension member further includes a reset elastic member, and the reset elastic member is connected between the first slider and the second slider to drive the first slider and the second slider to be relatively close.

[0018] In some embodiments, the first limiting rod group includes a first pivot rod and a first moving rod, the first moving rod is provided at both ends of the first pivot rod, and the first moving rod is telescopically movable relative to the first pivot rod, the first moving rod is pivotally connected to the corresponding longitudinal extension member, and the first pivot rod and the first moving rod are both used to abut against the pole plate;

[0019] The second limiting rod group includes a second pivot rod and a second moving rod, the middle part of the second pivot rod is pivotally connected to the middle part of the first pivot rod, the second moving rod is provided at both ends of the second pivot rod, and the second moving rod is telescopically movable relative to the second pivot rod, the second moving rod is pivotally connected to the corresponding longitudinal extension member, and the second pivot rod and the second moving rod are both used to abut the pole plate.

[0020] In some embodiments, the first limiting rod assembly further includes a first elastic member, the first elastic member being connected between the first moving rod and the first pivot rod and being used to drive the first moving rod to extend relative to the first pivot rod;

[0021] The second limiting rod assembly further includes a second elastic member, which is connected between the second moving rod and the second pivot rod and is used for driving the second moving rod to extend relative to the second pivot rod.

[0022] In some embodiments, the first moving rod and the second moving rod are both provided with an inner cavity, the inner cavity of the first moving rod is provided with the first elastic member, the end of the first pivot rod is inserted in the inner cavity of the first moving rod and is connected to the first elastic member, the inner cavity of the second moving rod is provided with the second elastic member, the end of the second pivot rod is inserted in the inner cavity of the second moving rod and is connected to the second elastic member.

[0023] In some embodiments, the first pivot rod is provided with a first slide, the inner cavity wall of the first moving rod is provided with a first slide groove, and the first slide is engaged in the first slide groove to guide the first moving rod to telescopically move relative to the first pivot rod;

[0024] The second pivot rod is provided with a second slide, the inner cavity wall of the second moving rod is provided with a second slide groove, and the second slide is engaged in the second slide groove to guide the second moving rod to telescopically move relative to the second pivot rod.

[0025] In some embodiments, the first slide groove forms a first observation port on the outer wall surface of the first moving rod, and the width of the first slide groove is smaller than the diameter of the first elastic member;

[0026] The second sliding groove forms a second observation port on the outer wall surface of the second moving rod, and the width of the second sliding groove is smaller than the diameter of the second elastic member.

[0027] In some embodiments, the first moving rod comprises a first rod body and a first pivot seat, the first rod body is provided with a first through hole, the first through hole is inserted with the first pivot rod and provided with the first elastic member, the first pivot seat is detachably provided at one end of the first rod body away from the first pivot rod and closes the opening of the first through hole, one end of the first pivot seat abuts against the first elastic member, and the other end of the first pivot seat is pivotally connected to the first slider;

[0028] The second movable rod includes a second rod body and a second pivot seat, the second rod body is provided with a second through hole, the second through hole is inserted with the second pivot rod and is provided with the second elastic member, the second pivot seat is detachably provided at one end of the second rod body away from the second pivot rod and closes the opening of the second through hole, one end of the second pivot seat is abutted against the second elastic member, and the other end of the second pivot seat is pivotally connected to the second slider.

[0029] In some embodiments, a first pivot groove is provided at one end of the first pivot rod in the thickness direction, and the first pivot groove is located in the middle of the first pivot rod. A second pivot groove is provided at the other end of the second pivot rod in the thickness direction, and the second pivot groove is located in the middle of the second pivot rod. The middle of the first pivot rod fits in the second pivot groove, and the middle of the second pivot rod fits in the first pivot groove. One of the first pivot groove and the second pivot groove is provided with a pivot and the other is provided with a pivot hole, and the pivot fits in the pivot hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the use state of the limiting tool for battery stack assembly according to an embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of a position limiting tool for battery stack assembly according to an embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of a longitudinal extension piece of a limiting tool for battery stack assembly according to an embodiment of the present invention;

[0033] Figure 4 is a schematic diagram of a first limiting rod group of a limiting tool for battery stack assembly according to an embodiment of the present invention;

[0034] Figure 5 is a schematic diagram of a first pivot rod of a limiting tool for battery stack assembly according to an embodiment of the present invention;

[0035] Figure 6 It is a schematic diagram of a second pivot rod of a limiting tool for battery stack assembly according to an embodiment of the present invention.

[0036] Reference numerals:

[0037] 1. Basic frame; 11. First basic frame; 12. Second basic frame; 13. Transverse extension member; 131. First transverse extension member; 132. Second transverse extension member; 14. Longitudinal extension member; 141. First longitudinal extension member; 142. Second longitudinal extension member; 143. Limiting beam; 144. First slider; 145. Second slider; 146. Reset elastic member;

[0038] 2. Scissor-type bracket; 21. First scissor-type bracket; 22. Second scissor-type bracket; 23. First limiting rod group; 231. First pivot rod; 2311. First slide; 2312. First pivot slot; 232. First moving rod; 2321. First slide slot; 2322. First rod body; 2323. First pivot seat; 233. First elastic member; 24. Second limiting rod group; 241. Second pivot rod; 2411. Second slide; 2412. Second pivot slot; 242. Second moving rod; 2421. Second slide slot; 2422. First rod body; 2423. First pivot seat; 243. Second elastic member; 25. Pivot; 26. Pivot hole;

[0039] 3. Polar plate; 4. First end plate; 5. Second end plate. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0041] Reference below Figure 1-Figure 6 A positioning tool for assembling a fuel cell stack according to an embodiment of the present invention is described.

[0042] like Figure 1-Figure 6 As shown, the limiting tool for battery stack assembly according to an embodiment of the present invention includes a basic frame 1 and a scissor-type bracket 2.

[0043] The horizontal direction of the basic frame 1 (such as Figure 1 The distance between the base frame 1 and the base frame 1 is adjustable so that the base frame 1 can be clamped on the outer periphery of the electrode plate 3 of the battery stack. The base frame 1 includes a first base frame 11 and a second base frame 12 arranged at intervals. The first base frame 11 and the second base frame 12 can be relatively close to or relatively far from each other. Specifically, as Figure 1 and Figure 2As shown, the first basic frame 11 and the second basic frame 12 are preferably but not limited to being arranged at intervals and opposite to each other in the up-down direction, and the first basic frame 11 and the second basic frame 12 can be relatively close to or relatively far away from each other in the up-down direction.

[0044] The scissor-type bracket 2 includes a first scissor-type bracket 21 and a second scissor-type bracket 22. The first scissor-type bracket 21 is connected to one lateral end (such as Figure 1 and Figure 2 The front end of the first basic frame 11 shown in the figure) and the lateral end of the second basic frame 12 (as shown in the figure) Figure 1 and Figure 2 The front end of the second basic frame 12 shown in FIG. 1 is used to abut against a lateral end of the plate 3 located between the first basic frame 11 and the second basic frame 12 (such as Figure 1 The second scissor-type bracket 22 is connected to the other lateral end of the first basic frame 11 (as shown in FIG. Figure 1 and Figure 2 The rear end of the first basic frame 11 shown in the figure) and the other lateral end of the second basic frame 12 (as shown in the figure) Figure 1 and Figure 2 The rear end of the second basic frame 12 shown in the figure is used to abut against the other lateral end of the plate 3 located between the first basic frame 11 and the second basic frame 12 (as shown in the figure). Figure 1 The rear end of the electrode plate 3 is shown in FIG. 1 ). The electrode plates 3 between the first basic frame 11 and the second basic frame 12 are preferably, but not limited to, a plurality of electrode plates stacked in sequence along the up-and-down direction.

[0045] The limiting tool for assembling a battery stack in an embodiment of the present invention has a basic frame with an adjustable lateral distance so that it can be clamped on the periphery of the electrode plate of the battery stack, and a first scissors-type bracket and a second scissors-type bracket arranged along the lateral interval are provided between the first basic frame and the second basic frame. The first scissors-type bracket and the second scissors-type bracket are used to clamp the lateral ends of the electrode plate between the first basic frame and the second basic frame. The first basic frame and the second basic frame can be relatively close to and relatively far away from each other when the battery stack is press-assembled, and drive the first scissors-type bracket and the second scissors-type bracket to deform, so that all the electrode plates of the battery stack are limited by the first basic frame, the second basic frame, the first scissors-type bracket and the second scissors-type bracket when the battery stack is assembled, so as to ensure the stacking consistency of the battery stack, and at the same time avoid damaging the end plate of the battery stack, so as to ensure the structural strength of the end plate.

[0046] In some embodiments, the first basic frame 11 is used to abut against one end of the first end plate 4 of the stack where the electrode plate 3 is provided, and the second basic frame 12 is used to abut against one end of the second end plate 5 of the stack where the electrode plate 3 is provided.

[0047] like Figure 1As shown, the battery stack includes a stacked first end plate 4, a plurality of electrode plates 3 and a second end plate 5. The first end plate 4 and the second end plate 5 are preferably but not limited to being arranged at intervals in the up and down directions, and the first end plate 4 is located above the second end plate 5.

[0048] Before the battery stack is pressed, the limiting tool is installed between the first end plate 4 and the second end plate 5, the first basic frame 11 abuts against the lower end surface of the first end plate 4, and at least clamps the electrode plate 3 closest to the first end plate 4, the second basic frame 12 abuts against the upper end surface of the second end plate 5, and at least clamps the electrode plate 3 closest to the second end plate 5, the first scissors-type bracket 21 and the second scissors-type bracket 22 clamp the remaining electrode plates 3 between the first basic frame 11 and the second basic frame 12, thereby limiting all the electrode plates 3 between the first end plate 4 and the second end plate 5 in the front-to-back direction.

[0049] When the battery stack is pressed, the first end plate 4 moves downward under pressure and pushes the first basic frame 11 to move downward. The first basic frame 11 drives the first scissors-type bracket 21 and the second scissors-type bracket 22 to compress and deform to avoid preventing the first end plate 4 from moving downward. At the same time, the limiting tooling always maintains the limiting position of all the plates 3 during the pressing process. After the battery stack is pressed into place and the first end plate 4 and the second end plate 5 are connected by the connecting parts, the limiting tooling is removed.

[0050] It is understandable that in other embodiments, there is a gap between the first base frame and the first end plate, and there is a gap between the second base frame and the second end plate. At this time, the first base frame moves toward the second base frame driven by the clamped pole plate.

[0051] In some embodiments, the base frame 1 includes a transverse extension member 13 and a longitudinal extension member 14. In other words, the first base frame 11 and the second base frame 12 both include a transverse extension member 13 and a longitudinal extension member 14. The transverse extension member 13 extends in a transverse direction (eg, Figure 1 The longitudinal extension member 14 extends in the longitudinal direction (as shown in the front-to-back direction). Figure 1 The left-right direction shown in the figure extends.

[0052] The transverse extension member 13 includes a Figure 1 The longitudinal extension member 14 includes a first transverse extension member 131 and a second transverse extension member 132 arranged in a spaced relationship along the transverse direction (as shown in the left and right directions). Figure 1 The first longitudinal extending members 141 and the second longitudinal extending members 142 are arranged at intervals (in the front-to-back direction as shown).

[0053] The first transverse extension member 131 connects one longitudinal end of the first longitudinal extension member 141 and one longitudinal end of the second longitudinal extension member 142. Figure 2As shown, the first transverse extending member 131 connects the left end of the first longitudinal extending member 141 and the left end of the second longitudinal extending member 142 .

[0054] The second transverse extension member 132 connects the other longitudinal end of the first longitudinal extension member 141 and the other longitudinal end of the second longitudinal extension member 142. Figure 2 As shown, the second transverse extending member 132 connects the right end of the first longitudinal extending member 141 and the right end of the second longitudinal extending member 142 .

[0055] The first transverse extension member 131 and the second transverse extension member 132 can drive the first longitudinal extension member 141 and the second longitudinal extension member 142 to be relatively close to and / or relatively far away from each other in the front-to-back direction. In other words, the first transverse extension member 131 and the second transverse extension member 132 can adjust the transverse distance between the first longitudinal extension member 141 and the second longitudinal extension member 142, so that the first longitudinal extension member 141 and the second longitudinal extension member 142 can sandwich the electrode plate 3.

[0056] The first longitudinal extension member 141 is connected to the first scissor-type bracket 21, and the second longitudinal extension member 142 is connected to the second scissor-type bracket 22. Figure 2 As shown, the first scissors-type bracket 21 is connected between the first longitudinal extension piece 141 of the first base frame 11 and the first longitudinal extension piece 141 of the second base frame 12, and the second scissors-type bracket 22 is connected between the second longitudinal extension piece 142 of the first base frame 11 and the second longitudinal extension piece 142 of the second base frame 12, so that all the pole plates 3 are clamped by the longitudinal extension piece 14 and the scissors-type bracket 2 to limit the pole plates 3.

[0057] In some embodiments, the lengths of first lateral extension member 131 and second lateral extension member 132 are constant, one longitudinal end of first longitudinal extension member 141 and one longitudinal end of second longitudinal extension member 142 can be movably disposed on first lateral extension member 131 along the lateral direction, and the other longitudinal end of first longitudinal extension member 141 and the other longitudinal end of second longitudinal extension member 142 can be movably disposed on second lateral extension member 132 along the lateral direction.

[0058] like Figure 2As shown, the lengths of the first transverse extension member 131 and the second transverse extension member 132 in the front-to-back direction are constant, the left end of the first longitudinal extension member 141 and the left end of the second longitudinal extension member 142 are both connected to the first transverse extension member 131, and can be moved in the front-to-back direction relative to the first transverse extension member 131, so as to be relatively close to and relatively far away from each other under the drive of the first transverse extension member 131, the right end of the first longitudinal extension member 141 and the right end of the second longitudinal extension member 142 are both connected to the second transverse extension member 132, and can be moved in the front-to-back direction relative to the second transverse extension member 132, so as to be relatively close to and relatively far away from each other under the drive of the second transverse extension member 132, so that the first transverse extension member 131 and the second transverse extension member 132 can drive the first longitudinal extension member 141 and the second longitudinal extension member 142 to be relatively close to and relatively far away from each other, so that the lateral distance of the basic frame 1 is adjustable.

[0059] Preferably, if Figure 2 As shown, the first lateral extension member 131 and the second lateral extension member 132 are lead screws, which have a first thread segment and a second thread segment arranged in opposite thread directions. In other words, the lead screw has a first thread segment and a second thread segment arranged in sequence from front to back, and the thread direction of the first thread segment is opposite to that of the second thread segment.

[0060] The first thread segment is threadedly connected to the first longitudinal extension member 141, and the second thread segment is threadedly connected to the second longitudinal extension member 142, so as to drive the first longitudinal extension member 141 and the second longitudinal extension member 142 to be relatively close to and relatively far away from each other through the rotation of the lead screw. Specifically, the forward rotation of the lead screw drives the first longitudinal extension member 141 and the second longitudinal extension member 142 to be relatively close to each other, and the reverse rotation of the lead screw drives the first longitudinal extension member 141 and the second longitudinal extension member 142 to be relatively far away from each other.

[0061] In other embodiments, the length of first transverse extension member 131 and second transverse extension member 132 in the front-to-back direction is retractable, and both first transverse extension member 131 and second transverse extension member 132 are connected between first longitudinal extension member 141 and second longitudinal extension member 142. Specifically, first transverse extension member 131 is connected between the left end of first longitudinal extension member 141 and the left end of second longitudinal extension member 142, and second transverse extension member 132 is connected between the right end of first longitudinal extension member 141 and the right end of second longitudinal extension member 142. The first longitudinal extension member 141 and second longitudinal extension member 142 are driven relatively close and / or relatively far apart by the retraction and extension of first transverse extension member 131 and second transverse extension member 132.

[0062] Preferably, the first transverse extension member 131 and the second transverse extension member 132 are springs. The first longitudinal extension member 141 and the second longitudinal extension member 142 are manually pulled and the tension of the springs as the first transverse extension member 131 and the second transverse extension member 132 is overcome so that the first longitudinal extension member 141 and the second longitudinal extension member 142 are relatively separated, so that the base frame 1 can be sleeved on the periphery of the electrode plate 3, and the first longitudinal extension member 141 and the second longitudinal extension member 142 are relatively close to each other by the tension of the springs as the first transverse extension member 131 and the second transverse extension member 132 so as to be clamped on the electrode plate 3.

[0063] Preferably, the first transverse extension member 131 and the second transverse extension member 132 are telescopic rods, which extend to drive the first longitudinal extension member 141 and the second longitudinal extension member 142 to move relatively apart, and contract to drive the first longitudinal extension member 141 and the second longitudinal extension member 142 to move relatively close.

[0064] In some embodiments, the scissors-type bracket 2 includes a first limiting rod group 23 and a second limiting rod group 24, the middle part of the first limiting rod group 23 and the middle part of the second limiting rod group 24 are pivotally connected, the first end of the first limiting rod group 23 and the first end of the second limiting rod group 24 are both pivotally connected to the longitudinal extension member 14 of the first base frame 11, and can be moved longitudinally relative to the longitudinal extension member 14 of the first base frame 11, the second end of the first limiting rod group 23 and the second end of the second limiting rod group 24 are both pivotally connected to the longitudinal extension member 14 of the second base frame 12, and can be moved longitudinally relative to the longitudinal extension member 14 of the second base frame 12, and the first limiting rod group 23 and the second limiting rod group 24 are both used to abut the pole plate 3.

[0065] like Figure 2 As shown, the middle portion of the first limiting rod set 23 in the length direction and the middle portion of the second limiting rod set 24 in the length direction are pivotally connected about the front-rear direction.

[0066] In the first scissors-type bracket 21, the top end of the first limiting rod group 23 and the top end of the second limiting rod group 24 are both pivotally connected to the first longitudinal extension member 141 of the first base frame 11 around the front-to-back direction, and can be relatively close to and relatively far away from the first longitudinal extension member 141 of the first base frame 11, and the bottom end of the first limiting rod group 23 and the bottom end of the second limiting rod group 24 are both pivotally connected to the first longitudinal extension member 141 of the second base frame 12 around the front-to-back direction, and can be relatively close to and relatively far away from the first longitudinal extension member 141 of the second base frame 12.

[0067] In the second scissors-type bracket 22, the top end of the first limiting rod group 23 and the top end of the second limiting rod group 24 are both pivotally connected to the second longitudinal extension member 142 of the first base frame 11 around the front-to-back direction, and can be relatively close to and relatively far away from the second longitudinal extension member 142 of the first base frame 11, and the bottom end of the first limiting rod group 23 and the bottom end of the second limiting rod group 24 are both pivotally connected to the second longitudinal extension member 142 of the second base frame 12 around the front-to-back direction, and can be relatively close to and relatively far away from the second longitudinal extension member 142 of the second base frame 12.

[0068] Thus, the first scissor-type bracket 21 and the second scissor-type bracket 22 can be compressed as the first base frame 11 and the second base frame 12 are relatively approached, and can be extended as the first base frame 11 and the second base frame 12 are relatively separated.

[0069] The first limiting rod group 23 and the second limiting rod group 24 are both used to abut against the pole plates 3, so that the first scissor-type bracket 21 and the second scissor-type bracket 22 can clamp the plurality of pole plates 3 between the first basic frame 11 and the second basic frame 12 and limit the positions.

[0070] It can be understood that the ends of the first limit rod group and the second limit rod group are not limited to being movable along the longitudinal extension member. In other embodiments, one of the first limit rod group and the second limit rod group is pivotally connected to the longitudinal extension member and can move along the longitudinal extension member, and the other of the first limit rod group and the second limit rod group is pivotally connected to the longitudinal extension member, but the connection position along the length direction of the longitudinal extension member is constant.

[0071] In some embodiments, the longitudinal extension member 14 includes a limiting beam 143, a first slider 144 and a second slider 145. The limiting beam 143 is used to abut the pole plate 3. The first slider 144 and the second slider 145 are both arranged on the limiting beam 143 and can move longitudinally relative to the limiting beam 143. The first slider 144 is pivotally connected to the end of the first limiting rod group 23, and the second slider 145 is pivotally connected to the end of the second limiting rod group 24.

[0072] like Figure 1-Figure 3 As shown, the longitudinal extension member 14 includes a limiting beam 143 , a first slider 144 and a second slider 145 . In other words, the first longitudinal extension member 141 and the second longitudinal extension member 142 both include a limiting beam 143 , a first slider 144 and a second slider 145 .

[0073] The limiting beam 143 is used to abut against the electrode plate 3 so that the first longitudinal extension member 141 and the second longitudinal extension member 142 of the same basic frame 1 can sandwich the electrode plate 3 .

[0074] The first slider 144 and the second slider 145 are spaced apart on the limiting beam 143 along the left-right direction and can be relatively close to and relatively far away from each other along the left-right direction. In the first basic frame 11, the first slider 144 and the second slider 145 are connected to the lower end of the limiting beam 143. In the second basic frame 12, the first slider 144 and the second slider 145 are connected to the upper end of the limiting beam 143.

[0075] The two ends of the first limiting rod group 23 are respectively connected to the corresponding first slider 144 and are pivotally connected to the first slider 144 around the front-back direction. The two ends of the second limiting rod group 24 are respectively connected to the corresponding second slider 145 and are pivotally connected to the second slider 145 around the front-back direction.

[0076] When the first base frame 11 and the second base frame 12 are relatively close, the first scissor-type bracket 21 and the second scissor-type bracket 22 are compressed, and at the same time, the first slider 144 and the second slider 145 on the same limiting beam 143 are relatively far away. When the first base frame 11 and the second base frame 12 are relatively far away, the first scissor-type bracket 21 and the second scissor-type bracket 22 are extended, and at the same time, the first slider 144 and the second slider 145 on the same limiting beam 143 are relatively close.

[0077] It should be noted that since the limiting beam 143, the first limiting rod group 23 and the second limiting rod group 24 are all used to abut the electrode plate 3, the end surfaces of the limiting beam 143, the first limiting rod group 23 and the second limiting rod group 24 located on the same side in the front-to-back direction for abutting the electrode plate 3 are flush.

[0078] Furthermore, the first slider 144 and the second slider 145 are also used to abut against the electrode plate 3 . At this time, the end surfaces of the first slider 144 and the second slider 145 connected to the limiting beam 143 and used to abut against the electrode plate 3 are flush.

[0079] Furthermore, a slide groove extending in the left-right direction is provided on the surface of the limiting beam 143 , and parts of the first slider 144 and the second slider 145 are embedded in the slide groove so that the first slider 144 and the second slider 145 can move guided by the slide groove.

[0080] It can be understood that the limiting beam is not limited to being provided with a first slider and a second slider. In other embodiments, the limiting beam is provided with a slider and is pivotally connected to one of the first limiting rod group and the second limiting rod group, and the other of the first limiting rod group and the second limiting rod group is pivotally connected to the limiting beam.

[0081] In some embodiments, the longitudinal extension member 14 further includes a reset elastic member 146 , which is connected between the first slider 144 and the second slider 145 to drive the first slider 144 and the second slider 145 to move relatively closer.

[0082] like Figure 1-Figure 3 As shown, the longitudinal extension member 14 further includes a reset elastic member 146 , which extends in the left-right direction and is connected between the first slider 144 and the second slider 145 .

[0083] During the press-fitting process, the first base frame 11 is relatively close to the second base frame 12 under the drive of the first end plate 4, and the first slider 144 and the second slider 145 are relatively far away from each other and stretch the reset elastic member 146. When the press-fitting is completed and the position limiting tool is disassembled, the reset elastic member 146 is elastically reset to pull the first slider 144 and the second slider 145 relatively close to each other, thereby driving the scissor-type bracket 2 to stretch and reset, and pushing the first base frame 11 and the second base frame 12 relatively far away from each other, so as to facilitate the installation and use of the position limiting tool again.

[0084] It can be understood that the longitudinal extension member is not limited to including a reset elastic member. In other embodiments, the first base frame and the second base frame are pulled away from each other manually.

[0085] In some embodiments, Figure 2 and Figure 4 As shown, the first limiting rod group 23 includes a first pivot rod 231 and a first moving rod 232. The first moving rod 232 is provided at both ends of the first pivot rod 231 in the length direction, and the first moving rod 232 is telescopically movable relative to the first pivot rod 231. In other words, the first moving rod 232 is movable relative to the first pivot rod 231 along the length direction of the first limiting rod group 23. The first moving rod 232 is pivotally connected to the corresponding longitudinal extension member 14. Specifically, the top of the first moving rod 232 connected to the upper end of the first pivot rod 231 is pivotally connected to the first slider 144 of the longitudinal extension member 14 of the first base frame 11 in the front-to-back direction, and the bottom of the first moving rod 232 connected to the lower end of the first pivot rod 231 is pivotally connected to the first slider 144 of the longitudinal extension member 14 of the second base frame 12 in the front-to-back direction. The first pivot rod 231 and the first moving rod 232 are both used to abut against the pole plate 3 . Specifically, the first pivot rod 231 and the first moving rod 232 are flush with the surface of the pole plate 3 so as to abut against the pole plate 3 .

[0086] like Figure 2As shown, the second limiting rod group 24 includes a second pivot rod 241 and a second moving rod 242, and the middle portion of the second pivot rod 241 in the length direction is pivotally connected to the middle portion of the first pivot rod 231 in the length direction in a front-to-back direction. The second moving rod 242 is provided at both ends of the second pivot rod 241 in the length direction, and the second moving rod 242 can be telescopically moved relative to the second pivot rod 241. In other words, the second moving rod 242 can be moved relative to the second pivot rod 241 along the length direction of the second limiting rod group 24. The second moving rod 242 is pivotally connected to the corresponding longitudinal extension member 14, specifically, the top of the second moving rod 242 connected to the upper end of the second pivot rod 241 is pivotally connected to the second slider 145 of the longitudinal extension member 14 of the first base frame 11 in a front-to-back direction, and the bottom of the second moving rod 242 connected to the lower end of the second pivot rod 241 is pivotally connected to the second slider 145 of the longitudinal extension member 14 of the second base frame 12 in a front-to-back direction. The second pivot rod 241 and the second movable rod 242 are both used to abut the pole plate 3. Specifically, the second pivot rod 241 and the second movable rod 242 are flush with the surface of the pole plate 3 to abut the pole plate 3, and in the same scissors-type bracket 2, the first pivot rod 231, the first movable rod 232, the second pivot rod 241 and the second movable rod 242 are all flush with the surface of the pole plate 3 to abut the pole plate 3 at the same time to limit the position.

[0087] When the battery stack is pressed, the two first movable rods 232 on the first pivot rod 231 are relatively close to each other, and the two second movable rods 242 on the second pivot rod 241 are relatively close to each other, so as to ensure that the scissor-type bracket 2 can be compressed synchronously with the pressing of the battery stack.

[0088] After the scissor-type bracket 2 is removed from the pressed battery stack, the two first movable rods 232 on the first pivot rod 231 are relatively far away from each other, and the two second movable rods 242 on the second pivot rod 241 are relatively far away from each other, so that the scissor-type bracket 2 is reset, thereby facilitating reinstallation and use.

[0089] In some embodiments, the first limiting rod assembly 23 further includes a first elastic member 233 , which is connected between the first moving rod 232 and the first pivot rod 231 and is used to drive the first moving rod 232 to extend relative to the first pivot rod 231 .

[0090] like Figure 2 and Figure 4As shown, a corresponding first elastic member 233 is connected between each first moving rod 232 and the connected first pivot rod 231. When the battery stack is pressed, the two first moving rods 232 on the first pivot rod 231 are relatively close to each other, and the first elastic member 233 connected between the first moving rod 232 and the first pivot rod 231 is compressed. After the scissors-type bracket 2 is removed from the pressed battery stack, the first elastic member 233 drives the connected first moving rod 232 to extend relative to the first pivot rod 231. In other words, the two first moving rods 232 on the first pivot rod 231 are relatively separated by the first elastic member 233.

[0091] The second limiting rod assembly 24 further includes a second elastic member 243 . The second elastic member 243 is connected between the second moving rod 242 and the second pivot rod 241 , and is used to drive the second moving rod 242 to extend relative to the second pivot rod 241 .

[0092] like Figure 2 As shown, a corresponding second elastic member 243 is connected between each second movable rod 242 and the connected second pivot rod 241. When the battery stack is pressed, the two second movable rods 242 on the second pivot rod 241 are relatively close to each other, and the second elastic member 243 connected between the second movable rod 242 and the second pivot rod 241 is compressed. After the scissors-type bracket 2 is removed from the pressed battery stack, the second elastic member 243 drives the connected second movable rod 242 to extend relative to the second pivot rod 241. In other words, the two second movable rods 242 on the second pivot rod 241 are relatively separated by the second elastic member 243.

[0093] Therefore, the scissor-type bracket 2 can be automatically reset by the first elastic member 233 and the second elastic member 243, so that it is easy to install and use again.

[0094] The first elastic member 233 and the second elastic member 243 are preferably, but not limited to, springs.

[0095] It can be understood that the scissors-type bracket is not limited to having a first elastic member and a second elastic member. In other embodiments, the first base frame and the second base frame are manually pulled relatively away from each other, thereby driving the two first movable rods on the first pivot rod to move relatively away from each other, and driving the two second movable rods on the second pivot rod to move relatively away from each other.

[0096] In some embodiments, Figure 2 and Figure 4As shown, the first moving rod 232 and the second moving rod 242 are both provided with an inner cavity extending along the length direction, the inner cavity of the first moving rod 232 is provided with a first elastic member 233, the end of the first pivot rod 231 is inserted in the corresponding inner cavity of the first moving rod 232 and is connected to the first elastic member 233, the inner cavity of the second moving rod 242 is provided with a second elastic member 243, and the end of the second pivot rod 241 is inserted in the corresponding inner cavity of the second moving rod 242 and is connected to the second elastic member 243.

[0097] The inner cavity of the first moving rod 232 serves to guide the relative movement of the first moving rod 232 and the first pivot rod 231, and to limit the first elastic member 233. The inner cavity of the second moving rod 242 serves to guide the relative movement of the second moving rod 242 and the second pivot rod 241, and to limit the second elastic member 243.

[0098] It can be understood that, in other embodiments, the first moving rod and the first pivot rod may also be arranged side by side, and the second moving rod and the second pivot rod may also be arranged side by side.

[0099] In some embodiments, Figure 2 and Figure 4 As shown, the first pivot rod 231 is provided with a first slide 2311, and the first slide 2311 is preferably, but not limited to, a strip extending along the length direction of the first limiting rod group 23. The inner cavity wall of the first moving rod 232 is provided with a first slide groove 2321, and the first slide groove 2321 is a strip extending along the length direction of the first limiting rod group 23. The first slide 2311 is fitted in the first slide groove 2321 and can move along the first slide groove 2321 to guide the first moving rod 232 to telescopically move relative to the first pivot rod 231.

[0100] like Figure 2 As shown, the second pivot rod 241 is provided with a second slide 2411, and the second slide 2411 is preferably, but not limited to, a strip extending along the length direction of the second limiting rod group 24. The inner wall of the second moving rod 242 is provided with a second slide groove 2421, and the second slide groove 2421 is a strip extending along the length direction of the second limiting rod group 24. The second slide 2411 is fitted in the second slide groove 2421 and can move along the second slide groove 2421 to guide the second moving rod 242 to telescopically move relative to the second pivot rod 241.

[0101] In some embodiments, Figure 2 and Figure 4As shown, the first slide groove 2321 forms a first observation port on the outer wall surface of the first moving rod 232. In other words, the first slide groove 2321 penetrates the circumferential wall of the first moving rod 232 to form a first observation port on the outer wall surface of the first moving rod 232. The first observation port is used to observe the telescopic position of the first pivot rod 231 and the length of the first elastic member 233. The width of the first slide groove 2321 is smaller than the diameter of the first elastic member 233 to prevent the first elastic member 233 from detaching from the first slide groove 2321 to the first moving rod 232. The first slide table 2311 and the first moving rod 232 are flush with the surface facing the pole plate 3, thereby limiting the pole plate 3.

[0102] like Figure 2 As shown, the second slide groove 2421 forms a second observation port on the outer wall surface of the second moving rod 242. In other words, the second slide groove 2421 penetrates the circumferential wall of the second moving rod 242 to form a second observation port on the outer wall surface of the second moving rod 242. The second observation port is used to observe the telescopic position of the second pivot rod 241 and the length of the second elastic member 243. The width of the second slide groove 2421 is smaller than the diameter of the second elastic member 243 to prevent the second elastic member 243 from detaching from the second moving rod 232 from the first slide groove 2421. The second slide table 2411 and the second moving rod 242 are flush with the surface of the pole plate 3 so as to limit the pole plate 3.

[0103] In some embodiments, Figure 2 and Figure 4 As shown, the first moving rod 232 includes a first rod body 2322 and a first pivot seat 2323. The first rod body 2322 is provided with a first through hole. In other words, the first rod body 2322 is a sleeve. The first through hole is inserted with the first pivot rod 231 and provided with a first elastic member 233. The first pivot seat 2323 is detachably provided at one end of the first rod body 2322 away from the first pivot rod 231 and closes the opening of the first through hole. Specifically, the first elastic member 233 is provided inside the sleeve of the first rod body 2322. The first pivot rod 231 is inserted into the opening of one end of the first rod body 2322. The other end of the first rod body 2322 is detachably connected to the first pivot seat 2323, so as to open and close the opening of the other end of the first rod body 2322 through the first pivot seat 2323, so as to conveniently disassemble and assemble the first elastic member 233 through the opening of the other end of the first rod body 2322. One end of the first pivot seat 2323 abuts against the first elastic member 233 , and the other end of the first pivot seat 2323 is pivotally connected to the first slider 144 .

[0104] like Figure 2As shown, the second movable rod 242 includes a second rod body and a second pivot seat, and the second rod body is provided with a second through hole. In other words, the second rod body 2422 is a sleeve. The second through hole is inserted with a second pivot rod 241 and provided with a second elastic member 243. The second pivot seat is detachably provided at one end of the second rod body away from the second pivot rod 241 and closes the opening of the second through hole. Specifically, the second elastic member 243 is provided inside the sleeve of the second rod body 2422, and the second pivot rod 241 is inserted into the opening of one end of the second rod body 2422. The other end of the second rod body 2422 is detachably connected to the second pivot seat 2423, so as to open and close the opening of the other end of the second rod body 2422 through the second pivot seat 2423, so as to conveniently disassemble and assemble the second elastic member 243 through the opening of the other end of the second rod body 2422. One end of the second pivot seat abuts against the second elastic member 243, and the other end of the second pivot seat is pivotally connected to the second slider 145.

[0105] In some embodiments, a first pivot groove 2312 is provided at one end of the first pivot rod 231 in the thickness direction, and the first pivot groove 2312 is located in the middle of the first pivot rod 231. A second pivot groove 2412 is provided at the other end of the second pivot rod 241 in the thickness direction, and the second pivot groove 2412 is located in the middle of the second pivot rod 241. The middle of the first pivot rod 231 is engaged in the second pivot groove 2412, and the middle of the second pivot rod 241 is engaged in the first pivot groove 2312. One of the first pivot groove 2312 and the second pivot groove 2412 is provided with a pivot 25 and the other is provided with a pivot hole 26. The pivot 25 is engaged in the pivot hole 26.

[0106] like Figure 2 , Figure 5 and Figure 6 As shown, the first pivot rod 231 is provided with a first slide 2311 along the front-to-back direction, and one end thereof is provided with a first pivot slot 2312. The first pivot slot 2312 is located in the middle of the length direction of the first pivot rod 231, so that the middle of the first pivot rod 231 forms a first pivot portion, and the thickness of the first pivot portion is preferably, but not limited to, half the thickness of the first pivot rod 231. The surface of the first pivot portion is provided with a pivot hole 26 extending along the front-to-back direction. In other words, the bottom surface of the first pivot slot 2312 is provided with a pivot hole 26 extending along the front-to-back direction. The pivot hole 26 preferably, but not limited to, passes through the first pivot portion.

[0107] The second pivot rod 241 is provided with a second pivot slot 2412 at the other end thereof which is different from the second slide 2411 in the front-to-back direction. The second pivot slot 2412 is located in the middle of the length direction of the second pivot rod 241, so that the middle of the second pivot rod 241 forms a second pivot portion. The thickness of the second pivot portion is preferably, but not limited to, half of the thickness of the second pivot rod 241. The surface of the second pivot portion is provided with a pivot 25 extending in the front-to-back direction. In other words, the bottom surface of the second pivot slot 2412 is provided with a pivot 25 extending in the front-to-back direction.

[0108] The first pivot portion is engaged in the second pivot slot 2412 , the second pivot portion is engaged in the first pivot slot 2312 , and the pivot 25 is engaged in the pivot hole 26 , so that the first pivot rod 231 and the second pivot rod 241 can pivot about the front-rear direction.

[0109] In the description of the present invention, it is to be understood that the terms “center”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0110] In addition, the terms "first" and "second" are only used for distinction, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0111] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0112] In the present invention, 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.

[0113] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean 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 present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics 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.

[0114] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A position limiting tool for battery stack assembly, characterized in that: include: A basic frame (1), wherein the lateral distance of the basic frame (1) is adjustable so that the basic frame (1) can be clamped on the periphery of the electrode plate (3) of the battery stack, the basic frame (1) comprising a first basic frame (11) and a second basic frame (12) arranged at an interval, the first basic frame (11) and the second basic frame (12) being able to be relatively close to or relatively far away from each other; A scissor-type bracket (2), the scissor-type bracket (2) comprising a first scissor-type bracket (21) and a second scissor-type bracket (22), the first scissor-type bracket (21) being connected between one lateral end of the first basic frame (11) and one lateral end of the second basic frame (12), and being used to abut against one lateral end of a plate (3) located between the first basic frame (11) and the second basic frame (12), the second scissor-type bracket (22) being connected between the other lateral end of the first basic frame (11) and the other lateral end of the second basic frame (12), and being used to abut against the other lateral end of the plate (3) located between the first basic frame (11) and the second basic frame (12).

2. The position limiting tool for battery stack assembly according to claim 1, characterized in that: The first basic frame (11) is used to abut against one end of a first end plate (4) of the stack on which a pole plate (3) is provided, and the second basic frame (12) is used to abut against one end of a second end plate (5) of the stack on which a pole plate (3) is provided.

3. The position limiting tool for battery stack assembly according to claim 1, characterized in that: The base frame (1) comprises a transverse extension member (13) and a longitudinal extension member (14), wherein the transverse extension member (13) comprises a first transverse extension member (131) and a second transverse extension member (132) arranged at intervals in the longitudinal direction, and the longitudinal extension member (14) comprises a first longitudinal extension member (141) and a second longitudinal extension member (142) arranged at intervals in the transverse direction, wherein the first transverse extension member (131) connects a longitudinal end of the first longitudinal extension member (141) and a longitudinal end of the second longitudinal extension member (142), and the second transverse extension member (132) connects the first longitudinal extension member (141) and the second longitudinal extension member (142). The first lateral extension member (131) and the second lateral extension member (132) are connected to the other longitudinal end of the second longitudinal extension member (141) and the other longitudinal end of the second longitudinal extension member (142), the first lateral extension member (131) and the second lateral extension member (132) can drive the first longitudinal extension member (141) and the second longitudinal extension member (142) to be relatively close to and / or relatively far away from each other, so that the first longitudinal extension member (141) and the second longitudinal extension member (142) can clamp the electrode plate (3), the first longitudinal extension member (141) is connected to the first scissors-type bracket (21), and the second longitudinal extension member (142) is connected to the second scissors-type bracket (22).

4. The position limiting tool for battery stack assembly according to claim 3, characterized in that: The lengths of the first transverse extension member (131) and the second transverse extension member (132) are constant, one longitudinal end of the first longitudinal extension member (141) and one longitudinal end of the second longitudinal extension member (142) are both movably disposed on the first transverse extension member (131) in a transverse direction, and the other longitudinal end of the first longitudinal extension member (141) and the other longitudinal end of the second longitudinal extension member (142) are both movably disposed on the second transverse extension member (132) in a transverse direction.

5. The position limiting tool for battery stack assembly according to claim 4, characterized in that: The first transverse extension member (131) and the second transverse extension member (132) are screws, each having a first thread segment and a second thread segment arranged in opposite thread directions, the first thread segment being threadedly connected to the first longitudinal extension member (141), and the second thread segment being threadedly connected to the second longitudinal extension member (142), so that the first longitudinal extension member (141) and the second longitudinal extension member (142) are driven to move relatively closer or farther away from each other by the rotation of the screw.

6. The position limiting tool for battery stack assembly according to claim 3, characterized in that: The lengths of the first transverse extending member (131) and the second transverse extending member (132) are retractable, and the first transverse extending member (131) and the second transverse extending member (132) are both connected between the first longitudinal extending member (141) and the second longitudinal extending member (142).

7. The position limiting tool for battery stack assembly according to claim 6, characterized in that: The first transverse extending member (131) and the second transverse extending member (132) are springs, or the first transverse extending member (131) and the second transverse extending member (132) are telescopic rods.

8. The position limiting tool for battery stack assembly according to claim 3, characterized in that: The scissor-type bracket (2) comprises a first limiting rod group (23) and a second limiting rod group (24); the middle portion of the first limiting rod group (23) is pivotally connected to the middle portion of the second limiting rod group (24); the first end of the first limiting rod group (23) and the first end of the second limiting rod group (24) are both pivotally connected to the longitudinal extension member (14) of the first base frame (11) and are movable in the longitudinal direction relative to the longitudinal extension member (14) of the first base frame (11); the second end of the first limiting rod group (23) and the second end of the second limiting rod group (24) are both pivotally connected to the longitudinal extension member (14) of the second base frame (12) and are movable in the longitudinal direction relative to the longitudinal extension member (14) of the second base frame (12); the first limiting rod group (23) and the second limiting rod group (24) are both used for abutting against the pole plate (3).

9. The position limiting tool for battery stack assembly according to claim 8, characterized in that: The longitudinal extension member (14) comprises a limiting beam (143), a first slider (144) and a second slider (145); the limiting beam (143) is used to abut against the pole plate (3); the first slider (144) and the second slider (145) are both arranged on the limiting beam (143) and can move longitudinally relative to the limiting beam (143); the first slider (144) is pivotally connected to the end of the first limiting rod group (23); and the second slider (145) is pivotally connected to the end of the second limiting rod group (24).

10. The position limiting tool for battery stack assembly according to claim 9, characterized in that: The longitudinal extension member (14) further comprises a reset elastic member (146), wherein the reset elastic member (146) is connected between the first slider (144) and the second slider (145) to drive the first slider (144) and the second slider (145) to move relatively close to each other.

11. The position limiting tool for battery stack assembly according to claim 9, characterized in that: The first limiting rod group (23) comprises a first pivot rod (231) and a first moving rod (232); the first moving rod (232) is provided at both ends of the first pivot rod (231); the first moving rod (232) is telescopically movable relative to the first pivot rod (231); the first moving rod (232) is pivotally connected to the corresponding longitudinal extension member (14); the first pivot rod (231) and the first moving rod (232) are both used for abutting against the pole plate (3); The second limiting rod group (24) comprises a second pivot rod (241) and a second movable rod (242); the middle portion of the second pivot rod (241) is pivotally connected to the middle portion of the first pivot rod (231); the second movable rod (242) is provided at both ends of the second pivot rod (241); the second movable rod (242) is telescopically movable relative to the second pivot rod (241); the second movable rod (242) is pivotally connected to the corresponding longitudinal extension member (14); the second pivot rod (241) and the second movable rod (242) are both used for abutting the pole plate (3).

12. The position limiting tool for battery stack assembly according to claim 11, characterized in that: The first limiting rod group (23) further comprises a first elastic member (233), wherein the first elastic member (233) is connected between the first moving rod (232) and the first pivot rod (231) and is used for driving the first moving rod (232) to extend relative to the first pivot rod (231); The second limiting rod group (24) further comprises a second elastic member (243), wherein the second elastic member (243) is connected between the second moving rod (242) and the second pivot rod (241) and is used for driving the second moving rod (242) to extend relative to the second pivot rod (241).

13. The position limiting tool for battery stack assembly according to claim 12, characterized in that: The first moving rod (232) and the second moving rod (242) are both provided with an inner cavity, the inner cavity of the first moving rod (232) is provided with the first elastic member (233), the end of the first pivot rod (231) is inserted into the inner cavity of the first moving rod (232) and is connected to the first elastic member (233), the inner cavity of the second moving rod (242) is provided with the second elastic member (243), and the end of the second pivot rod (241) is inserted into the inner cavity of the second moving rod (242) and is connected to the second elastic member (243).

14. The position limiting tool for battery stack assembly according to claim 13, characterized in that: The first pivot rod (231) is provided with a first slide platform (2311), the inner cavity wall surface of the first moving rod (232) is provided with a first slide groove (2321), and the first slide platform (2311) is matched in the first slide groove (2321) to guide the first moving rod (232) to telescopically move relative to the first pivot rod (231); The second pivot rod (241) is provided with a second slide (2411), and the inner wall of the second movable rod (242) is provided with a second slide groove (2421). The second slide (2411) is engaged in the second slide groove (2421) to guide the second movable rod (242) to telescopically move relative to the second pivot rod (241).

15. The position limiting tool for battery stack assembly according to claim 14, characterized in that: The first sliding groove (2321) forms a first observation port on the outer wall surface of the first moving rod (232), and the width of the first sliding groove (2321) is smaller than the diameter of the first elastic member (233); The second sliding groove (2421) forms a second observation port on the outer wall surface of the second moving rod (242), and the width of the second sliding groove (2421) is smaller than the diameter of the second elastic member (243).

16. The position limiting tool for battery stack assembly according to claim 13, characterized in that: The first moving rod (232) comprises a first rod body (2322) and a first pivot seat (2323), the first rod body (2322) is provided with a first through hole, the first through hole is inserted with the first pivot rod (231) and is provided with the first elastic member (233), the first pivot seat (2323) is detachably provided at one end of the first rod body (2322) away from the first pivot rod (231) and closes the opening of the first through hole, one end of the first pivot seat (2323) abuts against the first elastic member (233), and the other end of the first pivot seat (2323) is pivotally connected to the first slider (144); The second movable rod (242) includes a second rod body and a second pivot seat, the second rod body is provided with a second through hole, the second through hole is inserted with the second pivot rod (241) and is provided with the second elastic member (243), the second pivot seat is detachably provided at one end of the second rod body away from the second pivot rod (241) and closes the opening of the second through hole, one end of the second pivot seat is abutted against the second elastic member (243), and the other end of the second pivot seat is pivotally connected to the second slider (145).

17. The position limiting tool for battery stack assembly according to claim 11, characterized in that: A first pivot groove (2312) is provided at one end in the thickness direction of the first pivot rod (231), and the first pivot groove (2312) is located in the middle of the first pivot rod (231). A second pivot groove (2412) is provided at the other end in the thickness direction of the second pivot rod (241), and the second pivot groove (2412) is located in the middle of the second pivot rod (241). The middle of the first pivot rod (231) is engaged in the second pivot groove (2412), and the middle of the second pivot rod (241) is engaged in the first pivot groove (2312). One of the first pivot groove (2312) and the second pivot groove (2412) is provided with a pivot (25) and the other is provided with a pivot hole (26), and the pivot (25) is engaged in the pivot hole (26).

Images