Energy storage battery and processing method

Abstract

The present invention relates to the technical field of energy storage battery processing, and specifically to an energy storage battery and a processing method. The energy storage battery comprises a battery shell, a pole group and a bus. The processing method comprises the following steps: slotting, cutting and brushing folding ears, bus casting and welding, and capping and acid adding. The bus is set to a straight line and a straight line bus is used to replace a traditional folding ear type and column type bus connection method to reduce the amount of lead used in the bus. At the same time, the pole ear at the end of the bus monomer is bent to shorten the length of the bus monomer, thereby achieving the purpose of reducing the amount of lead used in the bus. While ensuring the welding quality of the bus, the bus is prevented from fusing due to the small amount of lead used, thereby improving the quality of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage battery processing, in particular to an energy storage battery and a processing method thereof. Background Art

[0002] Energy storage batteries are battery systems used to store energy for later use. These systems can be used in a variety of applications, including but not limited to energy storage in residential buildings, peak reduction in the power grid, power quality management, energy storage in renewable energy systems, and electric vehicles. There are many types of energy storage batteries, including lead-acid batteries, lithium-ion batteries, sodium-sulfur batteries, nickel-metal hydride batteries, flow batteries, and peripheral devices such as supercapacitors.

[0003] The present application is aimed at lead-acid batteries for energy storage batteries. When the existing lead-acid batteries are used to form the bus, the lead liquid needs to be cooled by a mold to form the bus. In order to reduce production costs, major lead-acid battery manufacturers are trying to reduce the amount of lead metal in the bus as much as possible while ensuring the maximum current flow.

[0004] There are several ways to reduce the amount of lead metal used in busbars:

[0005] 1. Reduce the cross-sectional width of the busbar. However, there is a limit to the reduction of the cross-sectional width of the busbar. If the width is reduced too much, it will cause the fuse to blow when the maximum current flows.

[0006] 2. Reduce the thickness of the busbar, but by reducing the thickness of the busbar, it is very easy to cause poor solder joints on the tabs.

[0007] Therefore, there is an urgent need for a method that can avoid busbar melting and prevent cold solder joints to reduce the amount of lead used in the busbar. Summary of the invention

[0008] In view of the above problems, the present invention provides an energy storage battery and a processing method. The bus is set to a straight shape and a straight bus is used to replace the traditional folded ear and column bus connection methods to reduce the amount of lead used in the bus. At the same time, the ears at the ends of the bus cells are bent to shorten the length of the bus cells, thereby achieving the purpose of reducing the amount of lead used in the bus. While ensuring the welding quality of the bus, the bus is avoided from melting due to the small amount of lead used, thereby improving the quality of the battery.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] An energy storage battery comprises a battery case, a pole group and a busbar, wherein the battery case is arranged in a square shape, comprises an upper cover and a lower case, and the lower case is divided into two groups of parallel cells, wherein the corresponding pole group is inserted into the cells of each group;

[0011] The bus is connected to the pole ears at the top of the pole group, so that the pole ears of the pole group are connected in series to form a circuit for current flow. The bus includes a plurality of bus cells arranged in a straight line and poles located at the positive and negative ends of the circuit for current flow. The pole ears at the two ends of each group of the bus cells are bent toward the middle of the bus cell.

[0012] In addition, the present application also provides a method for processing the above-mentioned energy storage battery, comprising the following steps:

[0013] Step a: inserting the electrode group into the corresponding single cell of the lower shell of the battery shell, ensuring that the electrode ears of the electrode group in each group of the single cell are arranged in parallel straight lines;

[0014] Step b, brush cutting and folding the lugs. After the slotting work is completed, the lower shell is turned upside down onto the brush cutting panel of the brush cutting machine, so that the lugs pass through the brush cutting grooves on the brush cutting panel. The brush cutting roller located below the brush cutting panel moves linearly along the arrangement direction of the lugs. The brush cutting roller rotates to scrape off the surface oxide layer of the lugs. Synchronously, the extrusion block located at the lower end surface of the brush cutting panel is pushed out to extrude and bend the vertical lugs located at the two end edges in the single grid, so that the lugs are bent toward the adjacent lugs.

[0015] Step c, busbar cast welding, after the cutting and brushing is completed, the lower shell is transferred to a cast welding machine for cast welding processing, so that the busbar is formed on the pole ear through lead liquid cooling;

[0016] Step d, sealing and adding acid. After the cast welding is completed, the bus is squeezed downward by a pin so that the bus is located on the top of the lower shell. After applying sealant on the upper cover of the battery shell, the upper cover and the lower shell are sealed together. After the sealing is completed, acid is injected into the single cell through the acid adding hole on the upper cover, and then the battery is charged and discharged.

[0017] As an improvement, in step b, four groups of positioning grooves are recessed on the brush cutting panel, and each group of positioning grooves accommodates a group of inverted lower shells.

[0018] As an improvement, in step b, the extrusion blocks each include an extrusion portion, a sliding portion and a guide portion;

[0019] The extrusion portion is arranged in a right triangle shape, and the extrusion portion is arranged in an arc shape facing the side wall of the pole ear;

[0020] The sliding part is arranged in a square shape, the sliding part is connected to the pressing part, and the sliding part is slidably installed in the sliding groove on the cutting brush panel;

[0021] The guide portion is vertically arranged on the sliding portion.

[0022] As an improvement, the width L of the extrusion portion and the distance D between the to-be-bent pole ear and the adjacent pole ear satisfy the relationship: D<L<2D.

[0023] As an improvement, a receiving groove for receiving the extrusion part is provided on the cutting brush panel, facing the pushing direction of the extrusion block.

[0024] As an improvement, the extrusion block is pushed out by a push bar, the push bar is arranged perpendicular to the extrusion block pushing direction, and the push bar is provided with an obliquely arranged guide groove, the guide groove is interlaced with the guide part;

[0025] The extrusion blocks are provided in two groups, the extrusion blocks are slidably mounted on the brush cutting panel, and spring members for driving and returning are provided between the extrusion blocks.

[0026] As an improvement, the length S1 of the guide groove in the pushing direction of the extrusion block is equal to the pushing extension length S2 of the extrusion block.

[0027] As an improvement, the brush cutting roller comprises a rotating shaft, a disc portion and a brush;

[0028] The rotating shaft is rotatably arranged, and the disc portion is arranged in the middle of the rotating shaft, and the disc portion is pressed and matched with the round head at the end of the pushing bar to drive the pushing bar to slide;

[0029] The brushes are symmetrically arranged on both sides of the disc, and the brushes roll and brush the surface of the pole lugs.

[0030] As an improvement, a spacer is further provided between the pole ear to be bent and the adjacent pole ear, and the spacer prevents the bent pole ear from conflicting with the adjacent pole ear;

[0031] The spacer includes a spacer part, a connecting rod and a sliding block. The spacer part is provided with two groups. The spacer part of each group is arranged corresponding to the corresponding pole ear to be bent. The connecting rod is connected to the spacer part. The sliding block is arranged at the end of the connecting rod. A waist-shaped slide groove is provided on the sliding block. The sliding block is slidably matched with the limit bolt on the cutting brush panel through the waist-shaped slide groove. A blocking part is provided on the spacer part, which increases the contact area with the cutting brush roller.

[0032] The beneficial effects of the present invention are:

[0033] (1) The present invention reduces the amount of lead used in the bus by setting the busbar to a straight line and replacing the traditional folding ear and column type busbar connection methods with the straight line busbar. At the same time, by bending the pole ears at the ends of the busbar monomers, the length of the busbar monomers is shortened, thereby achieving the purpose of reducing the amount of lead used in the busbar. While ensuring the welding quality of the busbar, the busbar is prevented from fusing due to the small amount of lead used, thereby improving the quality and quality of the battery.

[0034] (2) The present invention uses a brush cutting roller to move the roller brush on the pole ear, driving the extrusion block to push out, and extruding the pole ear located at the side of the busbar monomer to bend the pole ear, thereby achieving the technical effect of automatically bending the pole ear instead of manual bending, improving the processing efficiency of the energy storage battery, and ensuring the consistency of the energy storage battery processing;

[0035] (3) The present invention not only uses an extrusion block to squeeze the pole ear to bend it, but also automatically separates the bent pole ear from the adjacent pole ear by providing a spacer, thereby avoiding excessive bending of the pole ear, causing the bent pole ear to contact with the adjacent pole ear and form a short circuit, thereby improving the quality of the energy storage battery.

[0036] In summary, the present invention has the advantages of low processing cost, consistent quality, good welding processing quality, etc., and is particularly suitable for the technical field of processing and manufacturing of energy storage batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the partial structure of an energy storage battery in accordance with Embodiment 1 of the present invention;

[0038] Figure 2 This is a schematic diagram of the three-dimensional structure of a lower shell according to an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the three-dimensional structure of an energy storage battery according to an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the three-dimensional structure of a busbar according to an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the processing method of Embodiment 2 of the present invention;

[0042] Figure 6 This is a schematic diagram of the three-dimensional structure of a brush cutting machine according to the second embodiment of the present invention;

[0043] Figure 7 This is a schematic diagram of the structure of the brush roller assembly of the second embodiment of the present invention;

[0044] Figure 8 The schematic diagram of the cooperation structure between the brush cutting roller and the brush cutting panel in the second embodiment of the present invention is shown in FIG. Figure 1 ;

[0045] Fig. 9This is a schematic diagram of the three-dimensional structure of the cutting brush roller according to the second embodiment of the present invention;

[0046] Fig.10 This is a schematic diagram of the three-dimensional structure of the brush cutting panel according to the second embodiment of the present invention;

[0047] Fig.11 This is a schematic diagram of the local structure of the brush cutting panel according to the second embodiment of the present invention;

[0048] Fig.12 The schematic diagram of the cooperation structure between the brush cutting roller and the brush cutting panel in the second embodiment of the present invention is shown in FIG. Figure 2 ;

[0049] Fig.13 This is a schematic diagram of the contraction state of the extrusion block in the second embodiment of the present invention;

[0050] Fig.14 This is a schematic diagram of the top view of the extrusion block of the second embodiment of the present invention;

[0051] Fig.15 Schematic diagram of the three-dimensional structure of the extrusion block in the second embodiment of the present invention Figure 1 ;

[0052] Fig.16 Schematic diagram of the three-dimensional structure of the extrusion block in the second embodiment of the present invention Figure 2 ;

[0053] Fig.17 This is a schematic diagram of the three-dimensional structure of the push bar according to the second embodiment of the present invention;

[0054] Fig.18 This is a schematic diagram of the three-dimensional structure of the spacer according to embodiment 3 of the present invention. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships 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.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not 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 one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0058] Embodiment 1:

[0059] like Figures 1 to 4 As shown, an energy storage battery comprises a battery shell 1, a pole group 2 and a bus bar 3. The battery shell 1 is arranged in a square shape. The battery shell 1 comprises an upper cover 11 and a lower shell 12. The lower shell 12 is divided into two groups of parallel cells 121. The corresponding pole group 2 is inserted in each group of cells 121.

[0060] The bus 3 is connected to the pole ears 21 at the top of the pole group 2, so that the pole ears 21 of the pole group 2 are connected in series to form a circuit for current flow. The bus 3 includes a plurality of bus cells 31 arranged in a straight line and poles 32 located at the positive and negative ends of the circuit for current flow. The pole ears 21 at the two ends of the bus cells 31 of each group are bent toward the middle of the bus cells 31.

[0061] First of all, it should be noted that the energy storage battery of the present application has been innovatively improved in structure. Different from the existing lead-acid energy storage battery, the bus of the energy storage battery of the present application adopts a non-bending structure, and the bus floats on the top of the lower shell 12, instead of sinking the bus in the single cell 121 like the traditional lead-acid energy storage battery, and the connection position of the bus monomer of the traditional lead-acid energy storage battery adopts a bridge-type connection method. For example, the structure disclosed in a lead-acid battery disclosed in Chinese patent application No. 201720019583.1 is that the bus is sunk in the single cell, and the bus monomer connection position adopts a bridge-type connection method. The bridge-type connection method requires the bus at the connection position to be bent and erected to cross the plastic partition of the lower shell, resulting in a significant increase in the amount of lead used. At the same time, it is difficult to make the shape of the bus at this location consistent with the rules, and it is very easy to cause melting due to the large current passing through during charging and discharging.

[0062] The busbar of the energy storage battery of the present application adopts a linear connection structure, which does not need to be bent or erected. The connection positions of the busbar monomers are directly connected in a linear manner, which makes the connection more stable, with strong cross-sectional consistency and strong current consistency.

[0063] Embodiment 2:

[0064] like Figures 5 to 17As shown, referring to Example 1, a method for processing the energy storage battery described in Example 1 according to Example 2 of the present invention is described, comprising the following steps:

[0065] Step a: inserting the electrode group 2 into the corresponding single cell 121 of the lower shell 12 of the battery shell 1, ensuring that the electrode ears 21 of the electrode group 2 in each group of the single cell 121 are arranged in parallel and straight lines;

[0066] Step b, brush cutting and folding ears. After the groove insertion work is completed, the lower shell 12 is turned upside down onto the brush cutting panel 4 of the brush cutting machine 1, so that the pole ear 21 passes through the brush cutting groove 40 on the brush cutting panel 4. The brush cutting roller 5 located below the brush cutting panel 4 moves linearly along the arrangement direction of the pole ear 21. The brush cutting roller 5 rotates to scrape off the surface oxide layer of the pole ear 21. Synchronously, the extrusion block 6 located on the lower end surface of the brush cutting panel 4 is pushed out to extrude and bend the vertical pole ears 21 located at the two end edges of the single grid 121, so that the pole ears 21 are bent toward the adjacent pole ears 21.

[0067] Step c, busbar cast welding: after the cutting and brushing is completed, the lower shell 12 is transferred to a cast welding machine for cast welding, so that the busbar 3 is formed on the pole ear 21 through lead liquid cooling;

[0068] Step d, sealing and adding acid. After the cast welding is completed, the bus 3 is squeezed downward by a ejector so that the bus 3 is located on the top of the lower shell 12. After the sealant is applied on the upper cover 11 of the battery shell 1, the upper cover 11 and the lower shell 12 are fitted and sealed. After the sealing is completed, the acid is injected into the single cell 121 through the acid adding hole on the upper cover 11, and then the battery is charged and discharged.

[0069] Among them, in the step b, four groups of positioning grooves 42 are recessed on the cutting and brushing panel 4, and each group of the positioning grooves 42 accommodates a group of inverted lower shells 12, which can realize the cutting and brushing processing of four groups of energy storage battery pole ears with high processing efficiency.

[0070] Firstly, unlike the processing method of traditional lead-acid energy storage batteries, in the present application, when the pole ears are cut and brushed to remove the oxide layer on the surface, the two sidemost pole ears of each group of pole ears are automatically bent simultaneously, so that when the pole ears are connected to the bus, the length of the bus can be shortened, the amount of lead metal used can be reduced, and the production cost can be reduced.

[0071] It should be emphasized here that although the existing lead-acid battery processing method includes manually bending the pole ears to shorten the formed length of the bus, the manual bending of the pole ears is very easy to cause the pole ears to be bent excessively or the bending angle to be insufficient due to manual operation. Excessive bending of the pole ears will cause the bent pole ears to overlap with adjacent pole ears, causing a short circuit, while insufficient bending angle of the pole ears will result in limited shortening of the length of the formed bus, and the cost reduction is not obvious.

[0072] The present application is based on the step of removing the oxide on the surface of the tab during the brushing and cutting process, and directly uses an improved brushing and cutting machine to realize the automatic bending of the tab. The bending angle is consistent and can maximize the bending angle of the tab, while avoiding overlapping of the tab and causing a short circuit.

[0073] Furthermore, in the step b, the extrusion block 6 includes an extrusion portion 61, a sliding portion 62 and a guide portion 63;

[0074] The extrusion portion 61 is arranged in a right triangle shape, and the extrusion portion 61 is arranged in an arc shape facing the side wall of the pole ear 21;

[0075] The sliding part 62 is arranged in a square shape, and the sliding part 62 is connected to the pressing part 61, and the sliding part 62 is slidably installed in the sliding groove 43 on the cutting brush panel 4;

[0076] The guide portion 63 is vertically disposed on the sliding portion 62 .

[0077] Furthermore, the width L of the extrusion portion 61 and the distance D between the to-be-bent pole tab 21 and the adjacent pole tab 21 satisfy the relationship: D<L<2D.

[0078] Furthermore, a receiving groove 44 for receiving the extrusion portion 61 is provided on the cutting and brushing panel 4 , facing the pushing direction of the extrusion block 6 .

[0079] It should be noted that in the present application, when the pole ears are cut and brushed to remove the oxidized materials on the surface, the pole ears at the side of each group of pole ears are bent by moving the extrusion block 6 out, wherein the arc-shaped side wall of the extrusion portion 61 is used to contact the pole ears. Since the pole ears are made of lead metal with a soft texture, the bending of the pole ears can be achieved by extrusion of the extrusion portion 61.

[0080] It is further explained that the width of the extrusion portion 61 is set just to ensure that when the extrusion portion 61 is in the extreme position, the tab can also be extruded and bent by the extrusion portion 61 .

[0081] It is further explained that, by providing the receiving groove 44 , the extrusion portion 61 can reach the receiving groove 44 , thereby achieving perfect bending of the electrode tab.

[0082] Specifically, the extrusion block 6 is driven to be pushed out by a push bar 7, the push bar 7 is arranged perpendicular to the pushing direction of the extrusion block 6, and the push bar 7 is provided with an obliquely arranged guide groove 71, the guide groove 71 is interlaced with the guide portion 63;

[0083] The extrusion blocks 6 are provided in two groups, and the extrusion blocks 6 are slidably installed on the brush cutting panel 4 , and spring members 72 for driving and returning are provided between the extrusion blocks 6 .

[0084] Furthermore, a length S1 of the guide groove 71 in the pushing direction of the extrusion block 6 is equal to a length S2 of the extrusion block 6 when pushed.

[0085] Furthermore, the cutting brush roller 5 includes a rotating shaft 51, a disc 52 and a brush 53;

[0086] The rotating shaft 51 is rotatably arranged, and the disk portion 52 is arranged in the middle of the rotating shaft 51. The disk portion 52 is pressed and matched with the round head at the end of the pushing bar 7 to drive the pushing bar 7 to slide;

[0087] The brushes 53 are symmetrically arranged on both sides of the disk 52 , and the brushes 53 roll and brush the surface of the pole tab 21 .

[0088] It should be noted that the pushing out of the squeezing block 6 is driven by the pushing bar 7 , and the movement of the pushing bar 7 is caused by the rotation and squeezing of the cutting brush roller 5 , so that the pushing bar 7 moves, thereby driving the squeezing block 6 to be pushed out.

[0089] Specifically, when the brush roller 5 rotates, the disk 52 located in the middle of the brush roller 5 is squeezed and matched with the round head of the push bar 7, so that the push bar 7 moves, and the brushes 53 on both sides of the disk 52 cut and brush the pole ears to remove oxides on the pole ears.

[0090] It is further explained that when the push bar 7 moves, the obliquely arranged guide groove 71 cooperates with the guide portion 63 to enable the extrusion block 6 to be pushed out horizontally. After the pushing is completed, the push bar 7 is restored by the restoring force of the stretched spring member 72.

[0091] It should be noted here that when the brush cutting roller 5 is working, it drives the pole ear to be cut and brushed through the moving assembly on the brush cutting machine. After the brush cutting roller 5 completes one brushing of the pole ear, the brush cutting roller 5 will move in the reverse direction and also rotate in the reverse direction to cut and brush the pole ear again.

[0092] In addition, it should be noted that the structure of the brush cutting machine of the present application has been fully disclosed in the patent document with application number 202211493099.4. The only difference is that the brush cutting machine of the present application does not require the use of a clamp. After the pole group is directly inserted into the lower shell, the pole group is carried by the lower shell to cut and brush the pole ears.

[0093] Embodiment 3:

[0094] like Fig.18 As shown, the components identical or corresponding to those in the second embodiment are marked with the corresponding reference numerals in the second embodiment. For the sake of simplicity, only the differences from the second embodiment are described below. The difference between the third embodiment and the second embodiment is that:

[0095] As shown in the figure, a spacer 8 is further provided between the pole ear 21 to be bent and the adjacent pole ear 21, and the spacer 8 prevents the bent pole ear 21 from conflicting with the adjacent pole ear 21;

[0096] The spacer 8 includes a spacer portion 81, a connecting rod 82 and a sliding block 83. The spacer portion 81 is provided with two groups. The spacer portion 81 of each group is provided corresponding to the corresponding pole ear 21 to be bent. The connecting rod 82 connects the spacer portion 81. The sliding block 83 is arranged at the end of the connecting rod 82. A waist-shaped slide groove 831 is provided on the sliding block 83. The sliding block 83 is slidably matched with the limiting bolt 45 on the cutting brush panel 4 through the waist-shaped slide groove 831. A blocking portion 84 is provided on the spacer portion 81. The blocking portion 84 increases the contact area with the cutting brush roller 5.

[0097] It should be noted that in order to maximize the bending of the pole ear and avoid collision of the bent pole ears, the present application isolates the bent pole ear from the adjacent pole ear by setting a spacer 8, so that when the pole ear is bent, it will not conflict with the adjacent pole ear. At the same time, due to the setting of the spacer 8, when the pole ear is bent, it can be bent to the maximum bending distance, thereby minimizing the length of the bus cell.

[0098] Specifically, when the brush cutting roller 5 rotates and brushes the pole ear, the brush cutting roller 5 will push the spacer 8 so that the spacer 8 is inserted between the pole ear to be bent and the adjacent pole ear before the extrusion block 6. Then the extrusion block 6 will extrude and bend the pole ear. When not processing, the spacer 8 is retracted and will not hinder the insertion of the pole ear. After the spacer 8 completes the blocking, it can be brought back to its original position by resetting the brush cutting roller 5 that rotates in the opposite direction.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for processing an energy storage battery, characterized in that: An energy storage battery comprises a battery shell (1), a pole group (2) and a busbar (3); the battery shell (1) is arranged in a square shape, the battery shell (1) comprises an upper cover (11) and a lower shell (12); the lower shell (12) is divided into two groups of parallel cells (121), and the corresponding pole group (2) is inserted into each group of cells (121); the busbar (3) is connected to the pole ears (21) at the top of the pole group (2), so that the pole ears (21) of the pole group (2) are connected in series to form a circuit for current flow; the busbar (3) comprises a plurality of busbar monomers (31) arranged in a straight line and poles (32) located at the positive and negative ends of the circuit for current flow; the pole ears (21) at the two ends of the busbar monomer (31) of each group are bent toward the middle of the busbar monomer (31); The processing method comprises the following steps: Step a, inserting the electrode group (2) into the corresponding single cell (121) of the lower shell (12) of the battery shell (1), ensuring that the electrode ears (21) of the electrode group (2) in each group of the single cell (121) are arranged in parallel and in a straight line; Step b, after the brush ears are cut and folded, the lower shell (12) is turned upside down onto the brush cutting panel (4) of the brush cutting machine (I), so that the pole ears (21) pass through the brush cutting groove (40) on the brush cutting panel (4), and the brush cutting roller (5) located below the brush cutting panel (4) moves linearly along the arrangement direction of the pole ears (21). The brush cutting roller (5) rotates to scrape off the surface oxide layer of the pole ears (21). Synchronously, the brush cutting roller (5) located at the lower end of the brush cutting panel (4) The extrusion block (6) on the surface is pushed out to extrude and bend the vertical pole ears (21) located at the edges of the two ends in the single cell (121), so that the pole ears (21) are bent toward the adjacent pole ears (21), and the extrusion block (6) is driven to be pushed out by a push bar (7), and the push bar (7) is arranged perpendicular to the pushing direction of the extrusion block (6), and the disk portion (52) on the cutting brush roller (5) is extruded and matched with the round head at the end of the push bar (7), so as to drive the push bar (7) to slide; The extrusion blocks (6) each comprise an extrusion portion (61), a sliding portion (62) and a guiding portion (63); the extrusion portion (61) is arranged in a right triangle shape, and the extrusion portion (61) is arranged in an arc shape facing the side wall of the pole ear (21); the sliding portion (62) is arranged in a square shape, and the sliding portion (62) is connected to the extrusion portion (61); the sliding portion (62) is slidably installed in a sliding groove (43) on the cutting brush panel (4); and the guiding portion (63) is vertically arranged on the sliding portion (62); The push bar (7) is provided with an obliquely arranged guide groove (71), the guide groove (71) is interlaced with the guide portion (63), two groups of the extrusion blocks (6) are provided, the extrusion blocks (6) are slidably mounted on the brush cutting panel (4), and spring members (72) for driving and returning are provided between the extrusion blocks (6); The cutting brush roller (5) comprises a rotating shaft (51), a disk portion (52) and a brush (53); the rotating shaft (51) is rotatably arranged, the disk portion (52) is arranged in the middle of the rotating shaft (51), and the brush (53) is symmetrically arranged on both sides of the disk portion (52); the brush (53) rolls and brushes the surface layer of the pole lug (21); Step c, busbar cast welding: after the cutting and brushing is completed, the lower shell (12) is transferred to a cast welding machine for cast welding processing, so that the busbar (3) is formed on the pole ear (21) through lead liquid cooling; Step d, sealing and acid addition. After the casting welding is completed, the busbar (3) is pressed downward by a pin so that the busbar (3) is located on the top of the lower shell (12). After the sealant is applied to the upper cover (11) of the battery shell (1), the upper cover (11) and the lower shell (12) are fitted and sealed. After the sealing is completed, acid is injected into the single cell (121) through the acid addition hole on the upper cover (11), and then the battery is tested for charge and discharge.

2. The energy storage battery processing method according to claim 1, characterized in that: In the step b, four groups of positioning grooves (42) are recessed on the brush cutting panel (4), and each group of the positioning grooves (42) accommodates a group of inverted lower shells (12).

3. The energy storage battery processing method according to claim 1, characterized in that: The width L of the extrusion portion (61) and the distance D between the to-be-bent pole lug (21) and the adjacent pole lug (21) satisfy the relationship: D<L<2D.

4. The energy storage battery processing method according to claim 1, characterized in that: A receiving groove (44) for receiving the extrusion portion (61) is provided on the brush cutting panel (4) facing the pushing direction of the extrusion block (6).

5. The energy storage battery processing method according to claim 1, characterized in that: The length S1 of the guide groove (71) in the pushing direction of the extrusion block (6) is equal to the pushing extension length S2 of the extrusion block (6).

6. The energy storage battery processing method according to claim 1, characterized in that: A spacer (8) is also provided between the pole lug (21) to be bent and the adjacent pole lug (21), and the spacer (8) prevents the bent pole lug (21) from contacting the adjacent pole lug (21); The spacer (8) includes a spacer portion (81), a connecting rod (82) and a sliding block (83). The spacer portion (81) is provided with two groups. The spacer portion (81) of each group is arranged corresponding to the corresponding pole ear (21) to be bent. The connecting rod (82) is connected to the spacer portion (81). The sliding block (83) is arranged at the end of the connecting rod (82). A waist-shaped sliding groove (831) is provided on the sliding block (83). The sliding block (83) is slidably matched with the limiting bolt (45) on the cutting brush panel (4) through the waist-shaped sliding groove (831). The spacer portion (81) is provided with a blocking portion (84), and the blocking portion (84) increases the contact area with the cutting brush roller (5).

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