Cell equalizer and cell equalization method

Abstract

The present invention discloses a battery cell equalizing machine and a battery cell equalizing method, which include a positioning mechanism for abutting against one side plate of a restraint tray to position a battery cell in the restraint tray; a pulling and equalizing mechanism, which includes a pulling cylinder, a pulling plate, a claw and a claw driving cylinder. The claw driving cylinder drives the claw to move so that the claw is engaged with a pull rod of the restraint tray; the claw driving cylinder is arranged on the pulling plate, and the pulling cylinder drives the pulling plate to move horizontally so that the claw pulls the pull rod of the restraint tray, thereby spacing the battery cells at equal intervals; and an ejecting mechanism for jacking up the battery cells after being spaced at equal intervals. In this way, simple pulling and equalizing are achieved through the pulling and equalizing mechanism, solving the problem in the traditional technology that motors or electric cylinders are relied on to achieve the pulling action, and the cost of the device and the control system is relatively high. Moreover, through the steps of positioning, pulling and equalizing, and ejecting, the equalized battery cells are jacked up, facilitating the subsequent clamping of the battery cells by a manipulator.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production equipment, and in particular to a battery cell equalizer. Background Art

[0002] A manipulator places a battery cell in a restraint tray. When the next processing is to be carried out, the manipulator needs to take out the battery cell from the restraint tray. However, at this time, the battery cell is in contact with the tray, and directly clamping the battery cell will cause the manipulator to collide with the tray, thus causing damage to the manipulator. Therefore, it is necessary to first pull the trays at equal intervals to separate the battery cells at equal intervals for subsequent clamping by the manipulator. In the prior art, most of them realize the pulling action through a motor or an electric cylinder, and the production cost of its device is relatively high, and during operation and use, the production processing and maintenance costs are also relatively high, and it cannot better meet the production requirements.

[0003] For example, an equalizing mechanism and a battery cell equalizer disclosed in the prior art. The equalizing mechanism includes a bracket, a plurality of positioning members, an adjusting rod, a plurality of sliders and multiple pairs of connecting rods. The plurality of positioning members are arranged in sequence and are slidably connected to the bracket along a first direction; the adjusting rod extends along the first direction and is slidably connected to the bracket along a second direction, and the second direction is perpendicular to the first direction; the plurality of sliders are slidably connected to the adjusting rod along the adjusting rod; one end of each pair of connecting rods in the multiple pairs of connecting rods is pivotally connected to one of the plurality of sliders, and the other end of each pair of connecting rods is respectively pivotally connected to an adjacent positioning member, and adjacent two connecting rods of adjacent pairs of connecting rods are pivotally connected to the same positioning member. The equalizing mechanism further includes a first driving mechanism, and the first driving mechanism includes a first motor and a first screw rod. The first motor is arranged on the bracket, the first screw rod is arranged to extend along the first direction and one end is connected to the first motor, and the other end is connected to another positioning member among the plurality of positioning members. By driving the first screw rod to rotate through the first motor, another positioning member can be driven to move, thereby driving the connecting rod to move along the second direction and driving the plurality of positioning members to move evenly to form equal intervals.

[0004] For this kind of equalizing mechanism and battery cell equalizer, it relies on a motor and a screw rod to control and realize the pulling action, and it has relatively high requirements for the control of the pulling stroke. Therefore, the production cost of the device (including the setting of the control system), the operation and use cost, and the maintenance cost (including the overhaul and replacement costs) are all relatively high.

[0005] Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the Invention

[0006] In view of this, in view of the deficiencies existing in the prior art, the main object of the present invention is to provide a battery cell equalizing machine, which realizes pulling equalization through a simple pulling equalizing mechanism, solves the problem that the traditional technology relies on motors or electric cylinders to achieve pulling actions, and the manufacturing cost and operating cost of the device and control system are relatively high. Moreover, through the steps of positioning, pulling equalization and ejecting, the equalized battery cells are jacked up, facilitating the subsequent clamping of the battery cells by the manipulator.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A battery cell equalizing machine includes

[0009] a positioning mechanism, which is used to abut against a side plate of the restraint tray to position the battery cell in the restraint tray;

[0010] a pulling equalizing mechanism, which includes a pulling cylinder, a pulling plate, a hook and a hook driving cylinder; the hook driving cylinder drives the hook to move so that the hook is engaged with the pull rod of the restraint tray; the hook driving cylinder is arranged on the pulling plate, and the pulling cylinder drives the pulling plate to move horizontally so that the hook pulls the pull rod of the restraint tray, and then pulls the battery cells in the restraint tray to equally space the battery cells;

[0011] an ejecting mechanism, which is arranged below the restraint tray and is used to jack up the equally spaced battery cells upward.

[0012] As a preferred solution, the positioning mechanism includes a positioning rod and a positioning cylinder, and the positioning cylinder drives the positioning rod to abut against a side plate of the restraint tray to position the battery cell in the restraint tray.

[0013] As a preferred solution, the ejecting mechanism includes an ejecting rod and a lifting cylinder, and the lifting cylinder controls the up and down movement of the ejecting rod so that the ejecting rod jacks up the equally spaced battery cells upward.

[0014] As a preferred solution, a plurality of the ejecting rods are arranged at intervals in the front-rear direction, and the lifting cylinder controls the synchronous up and down movement of the plurality of ejecting rods; the ejecting mechanism is further connected with a front-rear translation driving unit, and the front-rear translation driving unit drives the ejecting mechanism to move horizontally back and forth so that the ejecting mechanism switches to be located at a first position and a second position. When the ejecting mechanism is located at the first position, the lifting cylinder drives the plurality of ejecting rods to move upward to jack up the battery cells at odd sequence positions, and when the ejecting mechanism is located at the second position, the lifting cylinder drives the plurality of ejecting rods to move upward to jack up the battery cells at even sequence positions.

[0015] As a preferred solution, the restraint tray includes a plurality of partitions arranged side by side in the front-rear direction. Two adjacent partitions are hooked to each other and provided with a gap therebetween, so that a pullable space is left between two adjacent partitions.

[0016] As a preferred solution, two adjacent partitions are hooked to each other through a hooking convex portion and a hooking groove. The front-rear dimension of the hooking groove is larger than that of the hooking convex portion, so that the hooking convex portion can move back and forth in the corresponding hooking groove.

[0017] As a preferred solution, after the pulling and equalizing mechanism pulls the battery cell in place, the inner wall of the hooking convex portion abuts against the inner wall of the hooking groove.

[0018] As a preferred solution, a disc is provided at the front end of the pull rod. The hook claw has a clamping groove that penetrates the front and rear ends of the hook claw. The hook claw driving cylinder drives the hook claw to move so that the hook claw is located behind the corresponding disc, and the pull rod passes through the corresponding clamping groove.

[0019] As a preferred solution, the hook claw includes an upper hook claw and a lower hook claw. The hook claw driving cylinder drives the upper hook claw and the lower hook claw to move upward and downward respectively, so that the upper hook claw and the lower hook claw are respectively engaged with the corresponding pull rod.

[0020] A method for equalizing battery cells, based on the battery cell equalizing machine described in any one of the foregoing, includes the following steps

[0021] Step 1: Place the battery cell in the restraint tray, and the positioning mechanism positions the battery cell in the restraint tray;

[0022] Step 2: The hook claw cylinder drives the hook claw to be engaged with the pull rod of the restraint tray, and the pulling cylinder drives the pull plate to move horizontally, so that the hook claw pulls the pull rod of the restraint tray, so that the battery cells in the restraint tray are evenly spaced apart;

[0023] Step 3: The ejecting mechanism jacks up the released battery cell upward.

[0024] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions, it mainly includes the setting of a positioning mechanism, a pulling and equalizing mechanism, and an ejecting mechanism. In particular, the pulling and equalizing are realized through a simple pulling and equalizing mechanism, which solves the problems in the traditional technology that rely on motors or electric cylinders to realize the pulling action, and the manufacturing cost and operation cost of the device and the control system are relatively high. Moreover, through the steps of positioning, pulling and equalizing, and ejecting, the evenly divided battery cells are jacked up upward, which is convenient for the subsequent manipulator to clamp the battery cells.

[0025] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a side view of the battery cell equalizing machine of the first embodiment of the present invention;

[0027] Figure 2 It is a first partial three-dimensional diagram of the battery cell equalizing machine according to the first embodiment of the present invention;

[0028] Figure 3 It is a second partial three-dimensional diagram of the battery cell equalizing machine according to the first embodiment of the present invention;

[0029] Figure 4 It is a third partial three-dimensional diagram of the battery cell equalizing machine according to the first embodiment of the present invention;

[0030] Figure 5 It is a fourth partial three-dimensional diagram of the battery cell equalizing machine according to the first embodiment of the present invention;

[0031] Figure 6 is a partial side view of a partition of a restraining tray according to the first embodiment of the present invention;

[0032] Figure 7 is a three-dimensional diagram of a battery cell equalizing machine according to a second embodiment of the present invention;

[0033] Figure 8 It is a partial three-dimensional diagram of the battery cell equalizing machine according to the second embodiment of the present invention.

[0034] Description of the accompanying drawings: frame 1, tray side panel 2, battery cell 3, restraint tray 4, positioning rod 5, positioning cylinder 6, pulling cylinder 7, pulling plate 8, upper hook 9, lower hook 10, clamping cylinder 11, pulling rod 12, disc 13, upper hook part 14, lower hook part 15, partition 16, snap-in groove 17, push rod 18, lifting cylinder 19, gap 20, hook protrusion 21, hook groove 22, extension part 23, stop wall 24, front and rear translation drive unit 25, hook 26, hook driving cylinder 27. Implementation

[0035] Please refer to Figures 1 to 8 As shown, it shows the specific structures and method steps of various embodiments of the present invention.

[0036] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0037] As shown Figures 1 to 6 in the figure, it shows the specific structure and method steps of the first embodiment of the present invention.

[0038] A cell equalizing machine includes a frame 1 and a positioning mechanism, a pulling and equalizing mechanism, and an ejecting mechanism provided on the frame 1. The positioning mechanism and the pulling and equalizing mechanism are arranged above the top of the frame 1. An equalizing work position is provided at the top of the frame 1, and the ejecting mechanism is arranged below the frame 1.

[0039] The positioning mechanism is used to abut against one side plate of the restraint tray (i.e., the tray side plate 2) to position the cell 3 in the restraint tray 4; the positioning mechanism includes a positioning rod 5 and a positioning cylinder 6, and the telescopic rod of the positioning cylinder 6 moves horizontally back and forth; the positioning cylinder 6 drives the positioning rod 5 to abut against and position the tray side plate 2 to position the cell 3 in the restraint tray 4.

[0040] The pulling and equalizing mechanism includes a pulling cylinder 7, a pulling plate 8, a hook, and a hook driving cylinder. The hook driving cylinder drives the hook to move so that the hook is engaged with the pull rod 12 of the restraint tray 4; the hook driving cylinder is arranged on the pulling plate 8, and the pulling cylinder 7 drives the pulling plate 8 to move horizontally (taking the illustrated direction as a reference, it can be understood that the telescopic rod of the pulling cylinder 7 moves horizontally back and forth), so that the hook pulls the pull rod 12 of the restraint tray 4, and then pulls the cell 3 in the restraint tray 4 to equally space the cells 3; in the first embodiment, the hook includes an upper hook 9 and a lower hook 10, and the hook driving cylinder is a clamping jaw cylinder 11, which drives the upper hook 9 and the lower hook 10 to move upward and downward respectively, so that the upper hook 9 and the lower hook 10 are respectively engaged with the corresponding pull rod 12.

[0041] A disc 13 is provided at the front end of the pull rod 12. The rear end of the upper hook 9 has an upwardly extending upper hook portion 14, and the rear end of the lower hook 10 has a downwardly extending lower hook portion 15. The jaw cylinder 11 drives the upper hook 9 and the lower hook 10 to move upward and downward respectively, so that the upper hook portion 14 and the lower hook portion 15 are located behind the corresponding disc 13. For the restraint trays in the same row, a plurality of pull rods 12 are arranged at the upper and lower intervals at the front end of the frontmost partition 16, and the force balance is better during pulling. The upper hook portion 14 is located behind the upper disc 13, and the lower hook portion 15 is located behind the lower disc 13. Here, the upper hook portion 14 and the lower hook portion 15 both have a clamping groove 17, and the clamping groove 17 penetrates the front and rear ends of the corresponding upper hook portion 14 and lower hook portion 15. When the upper hook portion 14 and the lower hook portion 15 are located behind the corresponding disc 13, the pull rod 12 passes through the corresponding clamping groove 17, which is beneficial to improve the cooperation and clamping reliability between the upper hook portion 14, the lower hook portion 15 and the corresponding pull rod 12, avoid offset in the left and right directions, and ensure that the pulling operation is feasible and controllable. Also, the jaw cylinder 11 is connected with a solenoid valve. After the pulling cylinder 7 pulls the restraint trays 4 apart at equal intervals, the solenoid valve controls the jaw cylinder 11 to release the force and reset the lower hook 10 and the upper hook 9.

[0042] The ejection mechanism is arranged below the restraint tray 4 and is used to jack up the battery cells 3 after being pulled apart at equal intervals, so as to facilitate the subsequent robot to pick up the battery cells 3. The ejection mechanism includes a ejector rod 18 and a lifting cylinder 19. The lifting cylinder 19 controls the up and down movement of the ejector rod 18, and the ejector rod 18 is used to jack up the battery cells 3. Usually, a plurality of ejector rods are arranged at intervals in the front-rear direction, and the lifting cylinder controls the up and down movement of the plurality of ejector rods together. In this way, the lifting cylinder can jack up a plurality of battery cells 3 at one time. In order to further increase the interval between the jacked-up battery cells 3, the ejection mechanism is also connected with a front-rear translation drive unit 25. The front-rear translation drive unit 25 drives the ejection mechanism to perform front-rear translation movement, so that the ejection mechanism switches between a first position and a second position. When the ejection mechanism is in the first position, the lifting cylinder 19 drives the plurality of ejector rods 18 to move upward to jack up the battery cells 3 in the odd-numbered positions. When the ejection mechanism is in the second position, the lifting cylinder 19 drives the plurality of ejector rods 18 to move upward to jack up the battery cells 3 in the even-numbered positions. In this way, the interval between two adjacent jacked-up battery cells 3 is approximately doubled, making it very convenient for the subsequent robot to pick up the battery cells 3 and reducing the requirement for the movement accuracy of the robot.

[0043] The restraint tray 4 includes a plurality of partitions 16 arranged side by side in the front-rear direction. Adjacent partitions 16 are hooked to each other and provided with a gap 20 therebetween, so as to leave a pullable space between adjacent partitions 16. The partitions 16 of adjacent restraint trays 4 are hooked to each other through a hooking convex portion 21 and a hooking groove 22. Except for the two partitions 16 at the foremost end and the rearmost end, the front and rear ends of other partitions 16 respectively have a hooking convex portion 21 and a hooking groove 22. The hooking convex portion 21 is hooked in the hooking groove 22 of the partition 16 of an adjacent restraint tray 4. The front-rear dimension of the hooking groove 22 is larger than that of the hooking convex portion 21, so that the hooking convex portion 21 can move back and forth in the corresponding hooking groove 22. The pull rod 12 of the restraint tray is connected to or acts on the partition 16 at the foremost end. When pulling, the partition 16 at the foremost end and the second partition 16 adjacent thereto are first pulled to the maximum distance, and then, in turn, the second partition 16 and the third partition 16 are pulled to the maximum distance, and so on until the two partitions 16 at the rearmost end reach the maximum distance. After the pulling equalizing mechanism pulls the battery cells in place, the inner wall of the hooking convex portion abuts against the inner wall of the hooking groove. The sum of the pullable spaces between all adjacent battery cells is the actual working pulling stroke of the pulling cylinder 7.

[0044] In the first embodiment, the rear end of the partition 16 at the foremost end is provided with a hooking groove 22, and the front end of the partition 16 at the foremost end is connected to the pull rod 12; the front end of the partition 16 at the rearmost end is provided with a hooking convex portion 21; an extension portion 23 extends forward from the front end of the partition 16. The hooking convex portions 21 respectively protrude upward from the upper side surface of the front end of the extension portion 23 and downward from the lower side surface of the front end of the extension portion 23 to form an upper and lower double-sided convex portion structure. Correspondingly, a hooking groove 22 is recessed forward at the rear end of the partition 16. In the front-rear direction, the hooking groove 22 is in a convex shape. Therefore, stop walls 24 corresponding to the upper and lower ends inside the hooking groove 22 are formed at the rear end of the partition 16 for the upper and lower double-sided convex portion structure to extend into and be limited by the front side of the stop walls 24. When pulling, the upper and lower double-sided convex portion structure slides in the hooking groove 22. Similarly, the stop walls 24 slide relatively along the extension portion 23, which is beneficial to ensuring the smoothness and accuracy of the movement during pulling and avoiding jamming phenomena.

[0045] Next, the working process of the battery cell equalizer in the first embodiment is roughly as follows:

[0046] Place the battery cell 3 in the restraint tray 4 and position it at the equalizing station. The positioning cylinder 6 drives the positioning rod 5 to abut against the front side plate 2 of the tray to position the battery cell 3 in the restraint tray 4. Then, the jaw cylinder 11 drives the upper hook 9 and the lower hook 10 to move upward and downward respectively to cooperate with and latch onto the pull rod 12 of the restraint tray 4. After the upper hook 9 and the lower hook 10 are latched, the pulling cylinder 7 pulls the pull plate 8, thereby pulling the upper hook 9 and the lower hook 10 together, driving the pull rod 12 to move through the upper hook 9 and the lower hook 10, so that the restraint tray 4 can be evenly spaced apart. After being spaced apart, the solenoid valve controls the jaw cylinder 11 to release the force of the lower hook 10 and the upper hook 9 to reset. The lifting cylinder 19 drives the ejector rod 18 to move upward to lift the released battery cell 3 upward. Subsequently, the manipulator grabs the battery cell 3 above the ejector partition 16 to the next processing station.

[0047] Next, an equalizing method for battery cells is introduced, including the following steps:

[0048] Step 1, positioning step: Place the battery cell 3 in the restraint tray 4 and position it at the equalizing station, and use the positioning mechanism to position the battery cell 3 in the restraint tray 4;

[0049] Step 2-1, gripping step: The jaw cylinder 11 drives the upper hook 9 and the lower hook 10 to move upward and downward respectively to cooperate with and latch onto the pull rod 12 of the restraint tray 4;

[0050] Step 2-2, pulling and equalizing step: The pulling cylinder 7 pulls the upper hook 9 and the lower hook 10 and then pulls the pull rod 12 of the restraint tray 4, so that the battery cells in the restraint tray 4 are evenly spaced apart; Preferably, when designing the telescopic stroke of the pulling cylinder 7, its rated telescopic stroke is a little larger than the actual working pulling stroke. In this step 2-2, the pulling cylinder 7 directly pulls the partition 16 of the restraint tray 4 to the bottom to expand the gap 20 to the maximum, so there is no need to consider the actual pulling stroke, the control system is simple, and the production and operation costs are greatly reduced.

[0051] Step 3, resetting step: The jaw cylinder 11 controls the lower hook 10 and the upper hook 9 to release the force and reset;

[0052] Step 4, the step of ejecting the battery cell: The ejected battery cell 3 is lifted upward by the ejection mechanism. Specifically, when the ejection mechanism is in the first position, the lifting air cylinder 19 drives several ejector rods 18 to move upward to lift the battery cells 3 in the odd sequence positions upward. After the manipulator takes away the battery cells 3 in the odd sequence positions above the ejection partition 16, the front-back translation drive unit 25 drives the ejection mechanism to perform a front-back translation movement so that the ejection mechanism is in the second position. The lifting air cylinder 19 drives several ejector rods 18 to move upward to lift the battery cells 3 in the even sequence positions upward. Then, the manipulator takes away the battery cells 3 in the even sequence positions above the ejection partition 16.

[0053] As Figures 7 to 8 shown, it shows the specific structure of the second embodiment of the present invention. The structure and the battery cell equalization method of the second embodiment are basically the same as those of the first embodiment. The main difference lies in:

[0054] In the second embodiment, the claw 26 is located above the pull rod 12, and the claw driving air cylinder 27 drives the claw 26 to move up and down. When the claw driving air cylinder 27 drives the claw 26 to move downward, the claw 26 moves downward to cooperate and engage with the pull rod 12 of the restraint tray 4. Specifically, it means that the claw 26 extends downward to the rear side of the disc 13, and the clamping groove 17 has an open lower end to facilitate clamping on the pull rod 12. For the case where the restraint tray 4 is provided with multiple pull rods 12, multiple claws can be integrally designed on the same component, and the clamping grooves 17 are arranged at intervals to correspond to the corresponding pull rods 12. In this way, when the claw driving air cylinder 27 drives the same component to move downward, it can meet the purpose of multiple claws cooperating and engaging with multiple corresponding pull rods 12 together. Of course, if the pulling direction of the pull rod 12 is defined as the front-back direction, in addition to the claw being able to move in the up-down direction to cooperate and engage with the pull rod 12 of the restraint tray 4, in any movement direction in the vertical plane perpendicular to the pulling direction of the pull rod 12, the claw can extend to the pull rod 12 to form a cooperative engagement. Therefore, in actual design, it can be flexibly set as needed.

[0055] The design focus of the present invention is that it mainly includes the settings of the positioning mechanism, the pulling equalization mechanism, and the ejection mechanism. In particular, the pulling equalization is achieved through a simple pulling equalization mechanism, which solves the problems in the traditional technology that rely on motors or electric cylinders to perform pulling actions, and the manufacturing cost and operating cost of the device and the control system are relatively high. Moreover, through the positioning, pulling equalization, and ejection steps, the equalized battery cells are lifted upward, which is convenient for the subsequent manipulator to clamp the battery cells.

[0056] The above is only a preferred embodiment of the present invention, and it does not impose any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A cell equalizer, characterized in that: Comprising a positioning mechanism for abutting against a side plate of a restraint tray to position an electric core within the restraint tray; a pulling and equalizing mechanism including a pulling cylinder, a pulling plate, a hook and a hook driving cylinder; the hook driving cylinder drives the hook to move so that the hook is engaged with a pull rod of the restraint tray; the hook driving cylinder is disposed on the pulling plate, and the pulling cylinder drives the pulling plate to move horizontally so that the hook pulls the pull rod of the restraint tray, and further pulls the electric core in the restraint tray to equally space the electric cores apart; a disc is provided at the front end of the pull rod, the hook has a clamping groove that penetrates the front and rear ends of the hook, and the hook driving cylinder drives the hook to move so that the hook is located behind the corresponding disc, and the pull rod passes through the corresponding clamping groove; a jacking mechanism disposed below the restraint tray and for jacking up the equally spaced electric cores; the jacking mechanism includes a jacking rod and a lifting cylinder, and the lifting cylinder controls the up and down movement of the jacking rod so that the jacking rod jacks up the equally spaced electric cores; a plurality of the jacking rods are spaced in the front-rear direction, and the lifting cylinder controls the synchronous up and down movement of the plurality of jacking rods; the jacking mechanism is further connected to a front-rear translation driving unit, and the front-rear translation driving unit drives the jacking mechanism to perform front-rear translation movement so that the jacking mechanism switches between a first position and a second position. When the jacking mechanism is in the first position, the lifting cylinder drives the plurality of jacking rods to move upward to jack up the electric cores in odd sequence positions, and when the jacking mechanism is in the second position, the lifting cylinder drives the plurality of jacking rods to move upward to jack up the electric cores in even sequence positions.

2. The cell equalizer according to claim 1, wherein: The positioning mechanism includes a positioning rod and a positioning cylinder, and the positioning cylinder drives the positioning rod to abut against a side plate of the restraint tray to position the electric core in the restraint tray.

3. The cell equalizer according to claim 1, characterized in that: The restraint tray includes a plurality of partitions arranged side by side in the front-rear direction, and adjacent two of the partitions are hooked to each other and provided with a gap therebetween so that a pulling space is left between the adjacent two partitions.

4. The cell equalizer according to claim 3, wherein: Adjacent two of the partitions are hooked to each other through a hooking convex portion and a hooking groove, and the front-rear dimension of the hooking groove is larger than that of the hooking convex portion, so that the hooking convex portion can move back and forth in the corresponding hooking groove.

5. The cell equalizer according to claim 4, wherein: After the pulling and equalizing mechanism pulls the electric core in place, the inner wall of the hooking convex portion abuts against the inner wall of the hooking groove.

6. The cell equalizer according to claim 1, characterized in that: The hook includes an upper hook and a lower hook, and the hook driving cylinder drives the upper hook and the lower hook to move upward and downward respectively so that the upper hook and the lower hook are respectively engaged with the corresponding pull rod.

7. A method for equalizing battery cells, characterized in that: The electric core equalizing machine according to any one of claims 1 to 6 includes the following steps Step 1, placing the electric core in the restraint tray, and the positioning mechanism positions the electric core in the restraint tray; Step 2: The claw driving cylinder drives the claw to be engaged with the pull rod of the restraint tray, and the pulling cylinder drives the pull plate to move horizontally, so that the claw pulls the pull rod of the restraint tray, and the battery cells in the restraint tray are pulled apart at equal intervals. Step 3: The ejection mechanism jacks up the released battery cells upward.

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