Battery box
By designing a battery box that can adaptively adjust the clamping force, the compression mechanism is used to prevent the front and back of the battery cell from contacting the reaction medium, the problem of irreconciliation of clamping force and automatic loading and unloading in the prior art is solved, and the battery cell is realized Efficient passivation.
Patent Information
- Application Number
- CN202420997674.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-05-09
AI Technical Summary
Due to the unadjustable clamping force of the existing battery cell passivation furnace, the battery chips are not pressed tightly or damaged during the passivation process, which cannot realize automatic loading and unloading, and it is impossible to effectively avoid the gate line area on the front and back of the battery cell. Contact with the reaction medium.
A battery box that can adaptively adjust the clamping force is designed, adopting a box body with a top opening and at least a pair of compression mechanisms. Each pair of compression mechanisms includes a pressing plate and an elastic assembly, and the pressing plate is pushed from both sides by the elastic assembly. The battery cell ensures that the sides of the battery cell come into contact with the reaction medium, avoid contact with the gate line area on the front and back, and implements pressure on the surface of the battery cell through an adjustable compression mechanism.
Reliable compression of the battery cells is achieved, damage to the battery cells and contact with the reaction medium is avoided, automation and adaptability of the passivation process is ensured, and suitable for different numbers of battery cells.
Smart Images
Figure CN222365563U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a cell passivation furnace in the technical field of solar cells, and in particular to a battery box for carrying cells whose sides need to be passivated. Background Art
[0002] When producing solar cells, an existing process is to cut the whole cell into two or more cell slices for use. After the cell is cut into cell slices, the cut surface (i.e., the side) of the cell slice is a non-passivated section. In order to improve the power generation efficiency of the cell slice, the cell slice needs to be sent to a passivation furnace to passivate the cut surface of the cell slice. However, since there are grid lines on the front and back of the cell slice at this time, in order not to affect the conductive effect, the grid line area cannot be allowed to contact the reaction medium for reaction.
[0003] The existing passivation method is generally to manually place the battery slices in the battery box, and then manually cover the battery box cover on the grid line area of the battery slices, relying on the battery box cover to clamp the battery slices. This passivation method not only cannot realize automatic loading and unloading, but also because the clamping force of the battery box is not adjustable, it can only achieve the compression of a specific number of battery slices. When the number of battery slices is uncertain, the battery slices may not be compressed or may be damaged. Utility Model Content
[0004] In view of the problem that the clamping force of the existing battery box cannot be adjusted, the present application provides a battery box with adaptively adjustable clamping force.
[0005] The technical solution of the present application is as follows: A battery box comprises a box body with an opening at the top and at least one pair of pressing mechanisms, wherein:
[0006] Each pair of clamping mechanisms are symmetrically arranged at intervals, and each clamping mechanism includes a pressing plate and an elastic component, and the pressing plate is installed on the inner side of the box body through the elastic component, and a receiving cavity for receiving battery cells is formed between the pressing plates of the pair of clamping mechanisms, and the side edges of a group of battery cells to be passivated in the receiving cavity are placed toward the opening of the box body;
[0007] Each elastic component pushes the correspondingly connected pressing plate toward the accommodating cavity to press the battery cells in the accommodating cavity from both sides, and the pressing plate on the same side fully covers the contacted surface of the battery cells.
[0008] In the present application, a stack of battery cells is placed with the side to be passivated facing upward in a battery box, and the pressure plates on both sides of the battery box are used to press against the front or back sides of the two outermost battery cells from both sides, so that the front and back sides of the middle battery cell are pressed between the battery cells, and the battery cells on both sides are pressed by the pressure plates facing the front or back sides of the pressure plates, and only the side edges of the battery cells are exposed to contact with the reaction medium, which can prevent the grid line areas on the front and back sides of the battery cells from contacting the reaction medium and causing a passivation reaction; a pressing mechanism that can adaptively adjust the pressure acts on the two pressing plates to apply pressure to the surface of the battery cells, and reliable pressing can be achieved regardless of the number of battery cells.
[0009] Optionally, the pressing mechanism includes at least two pairs of pressing plates on the same side, which are axially symmetrically installed on the inner side of the box body through correspondingly connected elastic components.
[0010] By configuring at least two pairs of clamping mechanisms, the two pairs of clamping mechanisms can realize two-step clamping of the battery cells. When the battery cells are transported into the battery box by the feeding mechanism, the first pair of clamping mechanisms can avoid the area where the feeding mechanism clamps the battery cells to clamp the battery cells, then the feeding mechanism withdraws, and then the second pair of clamping mechanisms compress the remaining area of the battery cells. By compressing the battery cells in two steps, the battery cells can be compressed more reliably.
[0011] Optionally, a step structure is formed between adjacent pressing plates on the same side, and the adjacent pressing plates abut against each other via the step structure, so that the pressing plates on the same side form flush pressing surfaces.
[0012] By forming a step structure between adjacent pressing plates on the same side, the sealing of the pressing plate joints can be ensured, preventing the grid line area of the battery cell from contacting the reaction medium and affecting its conductive performance.
[0013] Optionally, an elastic isolation membrane is applied to the pressing surface of the pressing plate.
[0014] The elastic isolation membrane located between the pressing plate and the battery cell can fully fill the gap between them when the pressing plate presses the battery cell, thereby obtaining better sealing performance.
[0015] Optionally, each clamping mechanism includes at least one group of elastic components, each group of elastic components includes a spring and a guide column; the first end of the guide column is installed on the pressure plate, the second end of the guide column is slidably installed on the side plate of the box body, and the spring is mounted on the guide column between the pressure plate and the box body.
[0016] The pressing mechanism adopts an elastic component, which can elastically press the pressing plate against the battery cell, so that the pressing plate and the battery cell can fit more closely, avoiding the failure of the pressing plate to press the battery cell due to the thickness error of the battery cell.
[0017] Optionally, each clamping mechanism includes four groups of elastic components, and the four groups of elastic components are installed corresponding to the four corners of the pressing plate respectively.
[0018] Each clamping mechanism uses four sets of elastic components to clamp the four corners of the clamping plate, which can make the clamping plate evenly stressed and avoid warping of the clamping plate due to uneven stress.
[0019] Optionally, each group of elastic components further includes a limit block, which is mounted on the box body and has a cavity on the inner side of the limit block for the guide post to slide, wherein the diameter of the cavity is smaller than the diameter of the second end of the guide post.
[0020] By limiting the maximum travel of the guide post by the limit block, damage to the battery cell due to excessive pressure of the elastic component on the pressure plate can be avoided.
[0021] Optionally, the top of the box body is open, and the box body includes a bottom plate, a first side plate, a second side plate, a third side plate and a fourth side plate, and the first side plate, the second side plate, the third side plate and the fourth side plate are fixed on the four sides of the bottom plate in sequence; the pressure plate is symmetrically installed between the second side plate and the fourth side plate of the box body through an elastic component.
[0022] The box body is formed by combining a bottom plate and four side plates, and has a simple structure and is easy to manufacture.
[0023] Optionally, a plurality of first through holes for the reaction medium to pass through are formed on the first side plate, the third side plate and the bottom plate of the box body.
[0024] The side plates and the bottom plate of the box body are provided with first through holes, so that the reaction medium can enter the box body through the first through holes to perform a passivation reaction with the side edges of the battery cells.
[0025] Optionally, a tensioning plate is installed on the outer wall of each pressing plate, and second through holes for the tensioning plate to pass through are respectively opened on the second side plate and the fourth side plate, and a slot for inserting an operating member for operating the pressing plate to move is formed between the tensioning plate and the pressing plate.
[0026] By configuring a tensioning plate on the pressure plate, it is convenient for the operating part to operate the pressure plate through the tensioning plate; a slot is configured between the tensioning plate and the pressure plate for the operating part to be inserted, and it is compatible with operating parts of various specifications for insertion and driving the tensioning plate to move closer or farther. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a schematic diagram of a three-dimensional structure of an optional embodiment of the present application;
[0028] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure from another perspective;
[0029] Figure 3 for Figure 1 The main view;
[0030] Figure 4 for Figure 3A top view of
[0031] Figure 5 for Figure 3 Left view of
[0032] Figure 6 for Figure 1 A schematic diagram of the three-dimensional structure of the clamping mechanism;
[0033] Figure 7 for Figure 6 Disassembly diagram of
[0034] Figure 8 for Figure 6 Bottom view of .
[0035] Figures 1 to 8 Including:
[0036] Battery box 1;
[0037] Box body 10, first side plate 11, second side plate 12, third side plate 13, fourth side plate 14, bottom plate 15, first through hole 16, second through hole 17;
[0038] The clamping mechanism 20 , the pressing plate 21 , the elastic component 22 , the guide column 221 , the spring 222 , the limit block 223 , the accommodating cavity 23 , the step structure 24 , the tensioning plate 25 , the slot 26 , the first pair of clamping mechanisms 27 , and the second pair of clamping mechanisms 28 . DETAILED DESCRIPTION
[0039] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0040] like Figure 1 to Figure 5 As shown, the present application is a battery box 1, which is used in a battery cell passivation furnace and is used to load battery cells whose cut surfaces need to be passivated.
[0041] The battery box 1 includes a box body 10 with an opening at the top and at least one pair of pressing mechanisms 20 .
[0042] Wherein: each pair of clamping mechanisms 20 are symmetrically arranged at intervals, each clamping mechanism 20 comprises a pressing plate 21 and an elastic component 22, the pressing plate 21 is installed on the inner side of the box body 10 through the elastic component 22, and a receiving cavity 23 for receiving battery cells is formed between the pressing plates 21 of the pair of clamping mechanisms 20, and the side edges of a group of battery cells to be passivated in the receiving cavity 23 are placed toward the opening of the box body 10;
[0043] Each elastic component 22 pushes the correspondingly connected pressing plate 21 toward the accommodating cavity 23 to press the battery cells in the accommodating cavity 23 from both sides, and the pressing plates 21 on the same side fully cover the contacted surfaces of the contacted battery cells. Specifically, the pressing plates 21 on both sides press the front or back surfaces of the two outermost battery cells of a group of battery cells in the accommodating cavity 23 respectively.
[0044] In the present application, a stack of battery cells is placed with the side to be passivated facing upward in a battery box 1, and the pressure plates 21 on both sides of the battery box 1 are used to press against the front or back sides of the two outermost battery cells from both sides, so that the front and back sides of the middle battery cell are pressed between the battery cells, and the battery cells on both sides are pressed by the pressure plates 21 facing the front or back sides of the pressure plates 21, and only the side edges of the battery cells are exposed to contact with the reaction medium, which can prevent the grid line areas on the front and back sides of the battery cells from contacting the reaction medium and causing a passivation reaction; a pressing mechanism 20 that can adaptively adjust the pressure acts on the two pressing plates 21 to apply pressure to the surface of the battery cells, and reliable pressing can be achieved regardless of the number of battery cells.
[0045] As an optional implementation, the pressing mechanism 20 includes at least two pairs of pressing plates 21 on the same side, which are axially symmetrically installed on the inner side of the box body 10 through correspondingly connected elastic components 22.
[0046] By configuring at least two pairs of clamping mechanisms 20, the two pairs of clamping mechanisms 20 can realize two-step clamping of the battery cells. When the battery cells are transported into the battery box 1 by the feeding mechanism, the first pair of clamping mechanisms 27 can avoid the area where the feeding mechanism clamps the battery cells to clamp the battery cells, then the feeding mechanism withdraws, and then the second pair of clamping mechanisms 28 compresses the remaining area of the battery cells. By compressing the battery cells in two steps, the battery cells can be compressed more reliably.
[0047] In this embodiment, optionally, a step structure 24 is formed between adjacent pressing plates 21 on the same side, and the adjacent pressing plates 21 abut against each other via the step structure 24 so that the pressing plates 21 on the same side form a flush pressing surface.
[0048] By forming a step structure 24 between adjacent pressing plates 21 on the same side, the sealing of the joints of the pressing plates 21 can be ensured, preventing the grid line area of the battery cell from contacting the reaction medium and affecting its conductive performance.
[0049] In one of the embodiments, optionally, an elastic isolation membrane is applied to the pressing surface of the pressing plate 21 .
[0050] The elastic isolation membrane located between the pressing plate 21 and the battery cell can fully fill the gap between them when the pressing plate 21 presses the battery cell, thereby achieving better sealing performance.
[0051] As an optional implementation, Figure 6 to Figure 8As shown, each clamping mechanism 20 includes at least one group of elastic components 22, and each group of elastic components 22 includes a spring 222 and a guide column 221; the first end of the guide column 221 is installed on the pressure plate 21, and the second end of the guide column 221 is slidably installed on the side plate of the box body 10, and the spring 222 is mounted on the guide column 221 between the pressure plate 21 and the box body 10.
[0052] The pressing mechanism 20 uses an elastic component 22 to elastically press the pressing plate 21 against the battery cell, so that the pressing plate 21 and the battery cell can fit more closely, avoiding the failure of the pressing plate 21 to press the battery cell due to thickness errors of the battery cell.
[0053] In one embodiment, optionally, each clamping mechanism 20 includes four groups of elastic components 22 , and the four groups of elastic components 22 are installed corresponding to the four corners of the pressing plate 21 respectively.
[0054] Each pressing mechanism 20 uses four sets of elastic components 22 to press the four corners of the pressing plate 21, so that the pressing plate 21 can be evenly stressed and the pressing plate 21 can be prevented from warping due to uneven stress.
[0055] Optionally, each group of elastic components 22 also includes a limit block 223, which is installed on the box body 10 and has a cavity inside the limit block 223 for the guide column 221 to slide, and the diameter of the cavity is smaller than the diameter of the second end of the guide column 221.
[0056] The limiting block 223 limits the maximum travel of the guide pillar 221 , thereby preventing the battery cell from being damaged due to excessive pressure of the elastic component 22 on the pressure plate 21 .
[0057] like Figure 1 to Figure 5 As shown, optionally, the top of the box body 10 is open, and the box body 10 includes a bottom plate 15, a first side plate 11, a second side plate 12, a third side plate 13 and a fourth side plate 14, and the first side plate 11, the second side plate 12, the third side plate 13 and the fourth side plate 14 are sequentially fixed on the four sides of the bottom plate 15; the pressing plate 21 is symmetrically installed between the second side plate 12 and the fourth side plate 14 of the box body 10 through the elastic component 22. Optionally, the box body 10 is made of metal material (such as aluminum) to facilitate conductivity.
[0058] The box body 10 is formed by combining a bottom plate 15 with four side plates, and has a simple structure and is easy to manufacture.
[0059] Optionally, a plurality of first through holes 16 for the reaction medium to pass through are formed on the first side plate 11 , the third side plate 13 and the bottom plate 15 of the box body 10 .
[0060] The side plates and the bottom plate 15 of the box body 10 are provided with first through holes 16 to facilitate the reaction medium to enter the box body 10 through the first through holes 16 to perform a passivation reaction with the side edges of the battery cells.
[0061] like Figure 6 to Figure 8 As shown, optionally, a tensioning plate 25 is installed on the outer wall of each pressure plate 21, and a second through hole 17 for the tensioning plate 25 to pass through is respectively opened on the second side plate 12 and the fourth side plate 14, and a slot 26 is formed between the tensioning plate 25 and the pressure plate 21 for inserting an operating member for operating the pressure plate 21 to move.
[0062] By configuring the tensioning plate 25 on the pressing plate 21, it is convenient for the operating member to operate the pressing plate 21 through the tensioning plate 25; a slot 26 is configured between the tensioning plate 25 and the pressing plate 21 for the operating member to be inserted, so that the operating member can more reliably dock with the tensioning plate 25. Optionally, the operating member can operate the tensioning plate 25 through the second through hole 17, or operate the tensioning plate 25 through the slot 26, and the manner in which the operating member controls the movement of the tensioning plate 25 is not further limited.
[0063] like Figure 1 to Figure 5 As shown, it is one embodiment of the battery box 1. In this embodiment, the battery box 1 is equipped with three pairs of clamping mechanisms 20, including a first pair of clamping mechanisms 27 located in the middle and two second pairs of clamping mechanisms 28 located on both sides of the first pair of clamping mechanisms 27. The first pair of clamping mechanisms 27 is used to clamp the middle of the battery cell, and the second pair of clamping mechanisms 28 is used to clamp the two ends of the battery cell. The feeding mechanism can use a clamping claw to clamp the two ends of the battery cell for loading and unloading. The operating part first opens the three pairs of clamping mechanisms 20. After the feeding claws put a group of battery cells into the battery box 1, the operating part controls the first pair of clamping mechanisms 27 to clamp the middle part of the battery cell. At this time, the feeding claws can be withdrawn, and then the operating part controls the second pair of clamping mechanisms 28 to clamp the remaining part of the battery cell. Of course, the second pair of clamping mechanisms 28 can be set in multiple groups or only one group.
[0064] Below Figure 1 to Figure 5 Taking the battery box 1 including three pairs of pressing mechanisms 20 as an example, the specific action flow of the present application is described:
[0065] 1. Use operating parts such as clamping claws or cylinders to open the first pair of clamping mechanisms 27 and the second pair of clamping mechanisms 28 together, so that the accommodating cavity 23 in the middle of the battery box 1 becomes larger;
[0066] 2. The loading mechanism places the battery cells in the accommodating cavity 23 of the battery box 1, and cooperates with three pairs of pressing mechanisms 20 to release and press the battery cells;
[0067] 3. Loosen the clamps or cylinders corresponding to the first pair of clamping mechanisms 27 to allow the first pair of clamping mechanisms 27 to clamp the battery cells, and then withdraw the feeding mechanism from the battery box 1;
[0068] 4. Release the clamping claws or cylinders corresponding to the second pair of pressing mechanisms 28, so that the second pair of pressing mechanisms 28 press the battery cell to complete the wrapping of the grid line surface of the battery cell.
[0069] Of course, the order of step 3 and step 4 is not limited, and the order of the two steps can be swapped.
[0070] The present application is described in sufficient detail above with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the scope of protection of the present application. The scope of protection claimed in the present application is defined by the claims, rather than by the above description in the embodiments.
Claims
1. A battery box, characterized in that: The battery box comprises a box body with an opening at the top and at least one pair of pressing mechanisms, wherein: Each pair of the clamping mechanisms are symmetrically arranged at intervals, each of the clamping mechanisms comprises a pressing plate and an elastic component, the pressing plate is mounted on the inner side of the box body through the elastic component, a receiving cavity for receiving battery cells is formed between the pressing plates of the pair of the clamping mechanisms, and a side edge of a group of battery cells to be passivated in the receiving cavity is placed toward the opening of the box body; Each of the elastic components pushes the correspondingly connected pressing plate toward the accommodating cavity to press the battery cells in the accommodating cavity from both sides, and the pressing plate on the same side completely covers the contacted surface of the battery cells.
2. The battery box according to claim 1, characterized in that: The clamping mechanism comprises at least two pairs, and the pressing plates on the same side are axially symmetrically mounted on the inner side of the box body through the correspondingly connected elastic components.
3. The battery box according to claim 2, characterized in that: A step structure is formed between adjacent pressing plates on the same side, and the adjacent pressing plates abut against each other through the step structure, so that the pressing plates on the same side form a flush pressing surface.
4. The battery box according to claim 1, characterized in that: An elastic isolation membrane is attached to the pressing surface of the pressing plate.
5. The battery box according to claim 1, characterized in that: Each of the clamping mechanisms includes at least one group of elastic components, and each group of the elastic components includes a spring and a guide column; the first end of the guide column is installed on the pressure plate, and the second end of the guide column is slidably installed on the side plate of the box body, and the spring is mounted on the guide column between the pressure plate and the box body.
6. The battery box according to claim 5, characterized in that: Each of the clamping mechanisms includes four groups of elastic components, and the four groups of elastic components are installed corresponding to the four corners of the pressing plate respectively.
7. The battery box according to claim 5, characterized in that: Each group of the elastic components also includes a limit block, which is installed on the box body and has a cavity inside the limit block for the guide column to slide, and the diameter of the cavity is smaller than the diameter of the second end of the guide column.
8. The battery box according to claim 1, characterized in that: The top of the box body is open, and the box body includes a bottom plate, a first side plate, a second side plate, a third side plate and a fourth side plate, and the first side plate, the second side plate, the third side plate and the fourth side plate are sequentially fixed on the four sides of the bottom plate; the pressure plate is symmetrically installed between the second side plate and the fourth side plate of the box body through the elastic component.
9. The battery box according to claim 8, characterized in that: The first side plate, the third side plate and the bottom plate of the box body are provided with a plurality of first through holes for the reaction medium to pass through.
10. The battery box according to claim 8, characterized in that: A tensioning plate is installed on the outer side wall of each pressing plate, and a second through hole for the tensioning plate to pass through is respectively opened on the second side plate and the fourth side plate, and a slot for inserting an operating member for operating the pressing plate to move is formed between the tensioning plate and the pressing plate.