Battery pack maintenance method and maintenance tool

Abstract

The embodiment of the invention provides a battery pack maintenance method and a maintenance tool. The battery pack maintenance method comprises the steps that a frame assembly of a battery pack is fixed; the frame assembly comprises a plurality of cross beams which are arranged at intervals, and a bottom plate located between the adjacent cross beams in the battery pack is pushed, so that at least part of a battery cell group borne by the bottom plate protrudes; and taking out the protruding battery cell group. According to the battery pack maintenance method provided by the embodiment of the invention, the frame assembly of the battery pack is firstly fixed, then the bottom plate which bears the to-be-disassembled battery cell group and is positioned between the adjacent cross beams is pushed, so that the bottom plate drives at least part of the to-be-disassembled battery cell group to protrude out of other battery cell groups, and then the to-be-disassembled battery cell group is taken out; therefore, the battery cell group in the battery pack can be independently taken out, the battery cell group or the battery cells in the battery cell group can be dismounted and replaced, and the battery cell group dismounting process is simple and rapid.

Description

Technical Field

[0001] The present invention relates to the field of battery maintenance, and in particular to a battery pack maintenance method and maintenance tooling. Background Art

[0002] In the related art, when the battery cells in the battery pack are damaged and need to be removed and replaced, the battery pack needs to be disassembled as a whole and all the battery cells need to be taken out, and then the damaged battery cells need to be replaced, and then the battery pack needs to be reassembled. It is impossible to replace several battery cells in the battery pack independently, and the disassembly process is complicated and time-consuming. Summary of the invention

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

[0004] To this end, an embodiment of the present invention provides a battery pack repair method.

[0005] The embodiment of the present invention further provides a maintenance tool for implementing the battery pack maintenance method of the embodiment of the present invention.

[0006] The battery pack maintenance method of the embodiment of the present invention includes:

[0007] S1, frame assembly for fixing the battery pack;

[0008] S2, the frame assembly includes a plurality of cross beams arranged at intervals, pushing the bottom plate between adjacent cross beams in the battery pack so that at least part of the battery cell group carried by the bottom plate protrudes;

[0009] S3, taking out the protruding battery cell group.

[0010] The battery pack repair method of the embodiment of the present invention first fixes the frame assembly of the battery pack, and then pushes the bottom plate that carries the battery cell group to be removed and is located between adjacent cross beams, so that the bottom plate drives at least part of the battery cell group to be removed to protrude from other battery cell groups, and then the battery cell group to be removed is taken out. Therefore, the battery pack repair method of the embodiment of the present invention can independently take out the battery cell group in the battery pack, thereby removing the battery cell group or the battery cells in the battery cell group and replacing them, and the battery cell group disassembly process is simple and quick.

[0011] In some embodiments, step S1 specifically includes:

[0012] The first longitudinal beam and the second longitudinal beam of the frame assembly are supported and detachably connected by a bracket so that the bottom plate is suspended in the air, and the plurality of cross beams are connected between the first longitudinal beam and the second longitudinal beam.

[0013] In some embodiments, step S2 specifically includes:

[0014] The telescopic device is arranged opposite to the bottom plate carrying the battery cell group to be removed, and the bottom plate is pushed to move between adjacent crossbeams by the telescopic device to drive at least a portion of the battery cell group to be removed to protrude from other battery cell groups.

[0015] In some embodiments, the battery pack repair method further includes:

[0016] Before step S1 , or between step S1 and step S2 , a top pressing assembly provided on the frame assembly in the battery pack is disassembled to open a side of the battery cell group away from the bottom plate.

[0017] In some embodiments, the battery pack repair method further includes:

[0018] S4, replacing at least part of the battery cells in the removed battery cell group with new battery cells, and then reinstalling them between the adjacent beams, and making the bottom plate support the battery cell group.

[0019] In some embodiments, step S4 specifically includes:

[0020] Taking out the pushed bottom plate from between the adjacent cross beams, and cleaning the sealant remaining on the bottom plate and the cross beams;

[0021] Replacing at least part of the removed battery cells in the battery cell group with new battery cells;

[0022] Re-applying sealant on the cleaned bottom plate and / or the cross beam;

[0023] The bottom plate after cleaning and / or re-sealing the sealant and the battery cell group after replacing the battery cells are reinstalled between the adjacent beams, and the bottom plate is made to support the battery cell group.

[0024] In some embodiments, the crossbeam includes a main body and a crossbeam clamping platform, the crossbeam clamping platform is arranged at the bottom of the main body and extends toward another crossbeam adjacent to the crossbeam, the side wall of the bottom plate is provided with a bottom plate clamping groove, the crossbeam clamping platform is fitted in the bottom plate clamping groove, and is connected to the groove wall surface of the bottom plate clamping groove by bonding with a sealant;

[0025] The spacing between the main bodies of adjacent cross beams is constant and greater than or equal to the width of the bottom plate, and the connected battery cell groups and the bottom plate are sequentially pushed out from between the adjacent cross beams; or

[0026] The main body has a first section and a second section that are connected, and the bottom of the second section is provided with the crossbeam card platform. The spacing between adjacent second sections is greater than or equal to the width of the bottom plate, and the spacing between adjacent first sections is less than the width of the bottom plate. The bottom plate is first pushed to move between adjacent second sections to make part of the battery cell group protrude. After taking out the battery cell group, one end of the bottom plate is pushed along the arrangement direction of the crossbeam to make the bottom plate tilt and enter between adjacent first sections, and then the bottom plate between adjacent first sections is taken out.

[0027] In some embodiments, step S4 also includes: cleaning at least one of the foam layer, insulating sheet and plastic plate on the outer wall surface of the removed battery cell group, and then replacing at least part of the battery cells in the removed battery cell group with new battery cells, re-setting at least one of the foam layer, insulating sheet and plastic plate on the outer wall surface of the battery cell group after the replacement of the battery cells, the cleaned bottom plate and the cleaned beams, and then reinstalling the battery cell group after the replacement of the battery cells between adjacent beams.

[0028] The maintenance tool of the embodiment of the present invention comprises:

[0029] Tooling platform;

[0030] A bracket, the bracket is arranged on the tooling platform, and the top of the bracket has a connecting piece for detachably connecting the frame assembly;

[0031] A telescopic device is provided on the tooling platform to push the bottom plate to move.

[0032] The maintenance tool of the embodiment of the present invention, the bracket on the tool platform is used to be detachably connected to the frame assembly to fix the frame assembly, and the telescopic device is used to be arranged on the tool platform to push the bottom plate to implement the battery pack maintenance method of the embodiment of the present invention, and has a simple structure and is easy to operate.

[0033] In some embodiments, the brackets are arranged in at least two rows at intervals, and the brackets are movable relative to the tooling platform along the transverse direction and / or longitudinal direction of the frame assembly.

[0034] In some embodiments, the telescopic device is detachably connected to the tooling platform and is movable relative to the tooling platform along the longitudinal direction of the frame assembly. The top of the telescopic device has an abutment plate, which extends along the length direction of the base plate and is used to abut the base plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of a maintenance tool according to an embodiment of the present invention;

[0036] Figure 2The invention is a schematic diagram of a maintenance tool embodiment of a battery pack maintenance method of an embodiment of the invention. Figure 1 ;

[0037] Figure 3 yes Figure 2 A partial enlarged schematic diagram of the maintenance tooling;

[0038] Figure 4 The invention is a schematic diagram of a maintenance tool embodiment of a battery pack maintenance method of an embodiment of the invention. Figure 2 ;

[0039] Figure 5 The invention is a schematic diagram of a maintenance tool embodiment of a battery pack maintenance method of an embodiment of the invention. Figure 3 ;

[0040] Figure 6 The invention is a schematic diagram of a maintenance tool embodiment of a battery pack maintenance method of an embodiment of the invention. Figure 4 ;

[0041] Figure 7 The invention is a schematic diagram of a maintenance tool embodiment of a battery pack maintenance method of an embodiment of the invention. Figure 5 .

[0042] Reference numerals:

[0043] 10. Battery pack; 1. Frame assembly; 11. First longitudinal beam; 12. Second longitudinal beam; 13. Cross beam; 131. Cross beam fixture; 132. Main body; 1321. First section; 1322. Second section; 2. Bottom plate; 3. Cell group; 31. Cell; 4. Top pressure assembly;

[0044] 20. Maintenance tool; 21. Tool platform; 211. Strip hole; 22. Bracket; 221. Connector; 23. Telescopic device; 231. Abutment plate; 232. Base. DETAILED DESCRIPTION

[0045] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0046] Reference below Figure 1-Figure 7 A battery pack repair method and repair tool according to an embodiment of the present invention are described.

[0047] It should be noted that the battery pack 10 based on the battery pack repair method of the embodiment of the present invention preferably but not limited to includes a frame assembly 1, a base plate 2 and a cell group 3, the frame assembly 1 includes a plurality of beams 13 arranged at intervals, a base plate 2 is provided between adjacent beams 13, a cell group 3 is provided between at least some adjacent beams 13, and the cell group 3 is carried on the base plate 2.

[0048] For example, Figure 2-Figure 7 As shown, the cross beams 13 extend in the front-to-back direction and are arranged in a plurality of intervals in the left-to-right direction. A corresponding bottom plate 2 is provided between the bottoms of each adjacent cross beam 13, and the bottom plate 2 is preferably a strip plate extending in the front-to-back direction, and the bottom plate 2 and the bottom of the cross beam 13 are detachable. Preferably, except for the adjacent cross beams 13 at the leftmost end and the adjacent cross beams 13 at the rightmost end, a battery cell group 3 is provided between the remaining adjacent cross beams 13, and the battery cell group 3 is carried on the corresponding bottom plate 2. It can be understood that in other embodiments, corresponding battery cell groups 3 can be provided between all adjacent cross beams 13.

[0049] The following describes a battery pack repair method according to an embodiment of the present invention.

[0050] like Figure 2-Figure 7 As shown, the battery pack maintenance method of the embodiment of the present invention includes step S1, step S2 and step S3.

[0051] S1. Fix the frame assembly 1 of the battery pack 10. For example, the frame assembly 1 is detachably connected and fixed by a connector 211 such as a bolt, or the frame assembly 1 is clamped and fixed by a clamping device such as a manipulator and a clamping claw, or the frame assembly 1 is clamped and fixed by a clamping device such as a buckle.

[0052] S2. The frame assembly 1 includes a plurality of cross beams 13 arranged at intervals, and pushes the bottom plate 2 between adjacent cross beams 13 in the battery pack 10, so that at least a portion of the battery cell group 3 carried by the bottom plate 2 protrudes. Figure 4-Figure 6 As shown, the battery cell group 3 to be removed and the bottom plate supporting the battery cell group 3 are pushed upward to make at least the top of the battery cell group 3 to be removed protrude upward from other battery cell groups 3 in the battery pack 10 .

[0053] S3, remove the protruding battery cell group 3. For example, the battery cell group 3 to be removed is directly pushed out from between the adjacent beams 13 by pushing the bottom plate 2, or the protruding top of the battery cell group 3 is clamped by a clamping device such as a manipulator and a clamping claw, and then the battery cell group 3 is pulled out from between the adjacent beams 13 and removed.

[0054] The battery pack repair method of the embodiment of the present invention first fixes the frame assembly of the battery pack, and then pushes the bottom plate that carries the battery cell group to be removed and is located between adjacent cross beams, so that the bottom plate drives at least part of the battery cell group to be removed to protrude from other battery cell groups, and then the battery cell group to be removed is taken out. Therefore, the battery pack repair method of the embodiment of the present invention can independently take out the battery cell group in the battery pack, thereby removing the battery cell group or the battery cells in the battery cell group and replacing them, and the battery cell group disassembly process is simple and quick.

[0055] In some embodiments, step S1 specifically includes supporting and detachably connecting the first longitudinal beam 11 and the second longitudinal beam 12 of the frame assembly 1 through the bracket 22 so that the bottom plate 2 is suspended, and the plurality of cross beams 13 are connected between the first longitudinal beam 11 and the second longitudinal beam 12 .

[0056] like Figure 2-Figure 5 As shown, the frame assembly 1 of the battery pack 10 also includes a first longitudinal beam 11 and a second longitudinal beam 12. Preferably, the first longitudinal beam 11 and the second longitudinal beam 12 both extend in the left-right direction and are arranged at intervals in the front-to-back direction. The cross beam 13 extends in the front-to-back direction and is connected between the first longitudinal beam 11 and the second longitudinal beam 12. A plurality of cross beams 13 are arranged at intervals in the left-to-right direction and are connected between the first longitudinal beam 11 and the second longitudinal beam 12. The bottom plate 2 and the bottom of the first longitudinal beam 11 and the bottom of the second longitudinal beam 12 are all removable.

[0057] In step S1, the frame assembly 1 is placed on the bracket 22 and the base plate 2 is suspended so that there is space under the base plate 2 for pushing the base plate 2, and then the first longitudinal beam 11 and the second longitudinal beam 12 are detachably connected to the bracket 22, preferably but not limited to being detachably connected by a connector 211 such as a bolt, so as to fix the frame assembly 1.

[0058] It is understood that the structure of the bracket is not limited to Figure 1 and Figure 2 The structure shown.

[0059] It is understandable that the frame assembly is not limited to being fixed on the bracket. In other embodiments, the frame assembly is fixed by a clamping device such as a robot arm and a clamping claw.

[0060] The frame assembly 1 is fixed on the bracket 22 so that there is space under the bottom plate 2 for pushing the bottom plate 2, and the frame assembly 1 is prevented from moving when the bottom plate 2 is pushed subsequently.

[0061] In some embodiments, step S2 specifically includes disposing the telescopic device 23 relative to the bottom plate 2 carrying the battery cell group 3 to be removed, and pushing the bottom plate 2 to move between adjacent beams 13 through the telescopic device 23 to drive at least part of the battery cell group 3 to be removed to protrude from other battery cell groups 3.

[0062] like Figure 2-Figure 5 As shown, in step S2, the telescopic device 23 is arranged relative to the bottom plate 2 carrying the battery cell group 3 to be removed, and then the telescopic device 23 is driven to telescopically move to abut the bottom plate 2 and push the bottom plate 2 to move upward between adjacent beams 13, thereby driving at least the top of the battery cell group 3 to be removed to protrude from other battery cell groups 3.

[0063] The telescopic device 23 is preferably, but not limited to, a hydraulic jack.

[0064] The telescopic device 23 pushes the bottom plate 2 to move so that the bottom plate 2 and the battery cell group 3 move smoothly and receive little impact force, thus preventing the bottom plate 2 and the battery cell group 3 from being damaged.

[0065] It is understandable that the bottom plate is not limited to being pushed by the telescopic device. In other embodiments, the bottom plate is pushed by a robot or manually, such as manually hammering the bottom plate to push the bottom plate.

[0066] In some embodiments, the battery pack repair method of the embodiment of the present invention also includes disassembling the top pressure assembly 4 provided on the frame assembly 1 in the battery pack 10 before step S1, or between step S1 and step S2, so that the side of the battery cell group 3 facing away from the bottom plate 2 is open.

[0067] like Figure 2 As shown, the battery pack 10 also includes a top pressing assembly 4 arranged on the top of the frame assembly 1, and the top pressing assembly 4 is used to abut the top of the battery cell group 3, so as to cooperate with the bottom plate 2 to limit the position of the battery cell group 3 along the up and down directions. The top pressing assembly 4 preferably but not limited to includes a pressure strip and a cover plate (not shown in the figure), the pressure strip is connected to the top of the adjacent beam 31 with the battery cell group 3 in the middle, and the cover plate is connected to the top of the first longitudinal beam 11, the second longitudinal beam 12, and the two beams 13 at the leftmost and rightmost ends.

[0068] After step S1, in other words, after the first longitudinal beam 11 and the second longitudinal beam 12 are detachably connected to the bracket 22, the top pressing assembly 4 is removed from the top of the frame assembly 1, so that the top of the battery cell group 3 is open, so that the top of the battery cell group 3 to be removed protrudes upward from other battery cell groups 3, and the battery cell group 3 to be removed is conveniently taken out. Step S2 is performed after the top pressing assembly 4 is removed, in other words, the telescopic device 23 pushes the bottom plate 2 to move after the top pressing assembly 4 is removed.

[0069] It is understandable that the pressing assembly is not limited to being disassembled between step S1 and step S2. In other embodiments, the pressing assembly is disassembled before step S1. In other words, the pressing assembly is first disassembled, and then the frame assembly is placed on the bracket and connected.

[0070] In some embodiments, the battery pack repair method of the embodiment of the present invention further includes step S4.

[0071] S4, replacing at least part of the battery cells 31 in the removed battery cell group 3 with new battery cells 31, and then reinstalling them between adjacent beams 13, and making the bottom plate 2 support the battery cell group 3.

[0072] Specifically, after the cell group 3 to be removed is taken out, the removal operation of the cell group 3 of the battery pack 10 has been completed. At this time, the pushed bottom plate 2 can be removed or reset, and then the battery pack 10 can be used in a state where the cell group 3 is missing. It is also possible to replace all the cells 31 in the removed cell group 3 with new cells 31 or replace some damaged cells 31 in the cell group 3 with new cells 31, and then reinstall the cell group 3 after the cells 31 are replaced between adjacent crossbeams 13, while resetting the pushed bottom plate 2 and carrying the cell group 3 after the cells 31 are replaced, so as to replace the cell group 3 of the battery pack 10, and then use the battery pack 10 in a state where the cells 31 are replaced. Preferably, after the removal operation of the cell group 3 of the battery pack 10 is completed, at least some of the cells 31 in the cell group 3 are replaced with new cells 31.

[0073] In some embodiments, step S4 specifically includes taking out the pushed bottom plate 2 from between the adjacent cross beams 13, and cleaning the sealant remaining on the bottom plate 2 and the cross beams 13. Replacing at least part of the cells 31 in the removed cell group 3 with new cells 31. Resetting the sealant on the cleaned bottom plate 2 and / or cross beam 13. Reinstalling the cleaned and / or re-sealed bottom plate 2 and the cell group 3 after replacing the cells 31 between the adjacent cross beams 13, and allowing the bottom plate 2 to carry the cell group 3.

[0074] Specifically, the side wall surface of the bottom plate 2 is bonded to the bottom of the cross beam 13 by sealant, and the bonding strength of the sealant will not hinder the removal of the bottom plate 2. When the bottom plate 2 is pushed, the sealant between the bottom plate 2 and the cross beam 13 is torn and attached to the bottom plate 2 and the cross beam 13.

[0075] After the battery cell group 3 to be disassembled is taken out, the pushed bottom plate 2 is taken out from between the adjacent cross beams 13, and the sealant remaining on the bottom plate 2 and the cross beams 13 is cleaned. At least part of the battery cells 31 in the removed battery cell group 3 is replaced with new battery cells 31. It should be noted that the steps of replacing the battery cells 31 and cleaning the sealant can be performed simultaneously or sequentially.

[0076] Then, sealant is re-applied on the side wall surface of the cleaned bottom plate 2 and the bottom of the beam 13, and then the bottom plate 2 with sealant re-applied and the battery cell group 3 after replacing the battery cell 31 are reinstalled between adjacent beams 13, so that the bottom plate 2 is bonded between the bottoms of adjacent beams 13 and supports the battery cell group 3.

[0077] It is understandable that the bottom plate and the cross beam are not limited to being provided with sealant. In other embodiments, sealant is only provided on the side wall of the bottom plate, or only on the bottom of the cross beam. When sealant is only provided on the bottom of the cross beam, the cleaned bottom plate and the battery cell group after the battery cell is replaced are reinstalled between adjacent cross beams.

[0078] In some embodiments, the beam 13 includes a main body 132 and a beam clamp 131. The beam clamp 131 is disposed at the bottom of the main body 132 and extends toward another beam 13 adjacent to the beam 13. The side wall of the bottom plate 2 is provided with a bottom plate clamping groove. The beam clamp 131 is fitted in the bottom plate clamping groove and is bonded to the groove wall of the bottom plate clamping groove by means of sealant.

[0079] like Figure 4-Figure 6 As shown, the beam 13 includes a main body 132 and a beam bracket 131 which are connected in sequence along the vertical direction. The beam bracket 131 is arranged at the bottom of the main body 132 and extends toward another beam 13 adjacent to the beam 13. In other words, the leftmost beam 13 in the frame assembly 1 has a beam bracket 131 extending to the right, the rightmost beam 13 has a beam bracket 131 extending to the left, and the remaining beams 13 have beam brackets 131 extending to the left and right respectively.

[0080] The left and right walls of the bottom plate 2 are both provided with bottom plate slots, and the bottom plate slots are also formed on the bottom surface of the bottom plate 2. The beam clamping platform 131 extending to the right of the left end beam 13 of the bottom plate 2 is fitted in the bottom plate slot of the left side wall of the bottom plate 2, and the beam clamping platform 131 extending to the left of the right end beam 13 of the bottom plate 2 is fitted in the bottom plate slot of the right side wall of the bottom plate 2, thereby supporting the bottom plate 2 and making the bottom plate 2 detachably connected between the bottoms of adjacent beams 13.

[0081] The sealant is disposed between the beam clamping platform 131 and the groove wall surface of the bottom plate clamping groove.

[0082] In such Figure 4 In the example shown, the spacing between the main bodies 132 of adjacent crossbeams 13 is constant and greater than or equal to the width of the bottom plate 2 , and the connected battery cell groups 3 and the bottom plate 2 are pushed out from between the adjacent crossbeams 13 in sequence.

[0083] Specifically, the width of the main body 132 along the left-right direction is constant, so that the spacing between the main bodies 132 of adjacent beams 13 is constant, and the spacing between adjacent main bodies 132 is greater than or equal to the width of the bottom plate 2 along the left-right direction, so that the bottom plate 2 can move up and down between adjacent main bodies 132 in a horizontal posture. Therefore, when the bottom plate 2 is pushed to move, the bottom plate 2 together with the battery cell group 3 carried by it can be directly pushed out from between the adjacent beams 13, so that the bottom plate 2 and the battery cell group 3 can be taken out.

[0084] It is understandable that when the bottom plate 2 is reinstalled between the bottoms of adjacent beams 13, the bottom plate 2 is placed horizontally between adjacent bodies 132 and moved downward between adjacent beam clamps 131. The battery cell group 3 after replacing the battery cell 31 can be reinstalled together with the bottom plate 2, or after the bottom plate 2 is installed.

[0085] In such Figure 5 and Figure 6 In the example shown, the main body 132 has a connected first section 1321 and a second section 1322, and a crossbeam clamp 131 is provided at the bottom of the second section 1322. The spacing between adjacent second sections 1322 is greater than or equal to the width of the bottom plate 2, and the spacing between adjacent first sections 1321 is less than the width of the bottom plate 2. The bottom plate 2 is first pushed to move between adjacent second sections 1322 to allow part of the battery cell group 3 to protrude. After the battery cell group 3 is taken out, one end of the bottom plate 2 along the arrangement direction of the crossbeam 13 is pushed to tilt the bottom plate 2 and enter between adjacent first sections 1321, and then the bottom plate 2 between adjacent first sections 1321 is taken out.

[0086] Specifically, the main body 132 includes a first section 1321 and a second section 1322 which are sequentially connected along the vertical direction. The first section 1321 is located at the upper end of the second section 1322 , and a crossbeam clamp 131 is provided at the bottom of the second section 1322 .

[0087] The width of the first section 1321 along the left-right direction is constant, and the width of the second section 1322 along the left-right direction is constant, but the width of the first section 1321 is greater than the width of the second section 1322, so that in adjacent beams 13, the spacing between adjacent first sections 1321 is smaller than the spacing between adjacent second sections 1322, the spacing between adjacent first sections 1321 is smaller than the width of the bottom plate 2, and the spacing between adjacent second sections 1322 is greater than or equal to the width of the bottom plate 2.

[0088] When pushing the bottom plate 2 to move, first push the bottom plate 2 to move between adjacent second sections 1322 in a horizontal posture, thereby driving the top of the carried battery cell group 3 to protrude, and take the battery cell group 3 out from between adjacent beams 13 by the protruding part of the battery cell group 3 in a manner such as pulling, and then push the left or right end of the bottom plate 2, for example, adjust the position of the telescopic device 23, so that the telescopic device 23 moves from the middle of the bottom plate 2 along the left-right direction to the left or right end of the bottom plate 2, and then push the bottom plate 2 again through the telescopic device 23, or manually push the left or right end of the bottom plate 2 to make the bottom plate 2 rotate around the left-right direction and tilt, and be able to enter between adjacent first sections 1321, and manually or through tools such as clamps, suction cups, etc., extend from the top of the adjacent beams 13 into between the adjacent beams 13, so as to capture the bottom plate 2 in an inclined posture and take the bottom plate 2 out from between the adjacent beams 13.

[0089] Preferably, the first section 1321 and the second section 1322 are inclined to transition to facilitate the rotation and tilting of the base plate 2 .

[0090] It is understandable that when the bottom plate 2 is reinstalled between the bottoms of adjacent beams 13, the bottom plate 2 is first placed between the adjacent first sections 1321 in an inclined posture and moved downward, and after the bottom plate 2 enters between the adjacent second sections 1322, the bottom plate 2 is rotated to a horizontal posture and continues to move downward to between the adjacent beam clamps 131. The battery pack 3 after the battery cell 31 is replaced needs to be installed after the bottom plate 2 is installed.

[0091] In some embodiments, step S4 also includes cleaning at least one of the foam layer, insulating sheet and plastic plate on the outer wall surface of the removed battery cell group 3, and then replacing at least part of the battery cells 31 in the removed battery cell group 3 with new battery cells 31, and re-setting at least one of the foam layer, insulating sheet and plastic plate on the outer wall surface of the battery cell group 3 after replacing the battery cells 31, and then reinstalling the battery cell group 3 after replacing the battery cells 31 between adjacent beams 13.

[0092] like Figure 4-Figure 7 As shown, the battery pack 10 also includes at least one of a foam layer, an insulating sheet and a plastic plate. Preferably, a foam layer and an insulating sheet, or a foam layer and a plastic plate, or an insulating sheet are provided between the cross beam 13 and the battery cell group 3, and an insulating sheet is provided between the bottom plate 2 and the battery cell group 3.

[0093] Before replacing at least part of the battery cells 31 in the removed battery cell group 3 with new battery cells 31, the foam layer, insulating sheet and plastic plate remaining on the removed battery cell group 3 are removed, and then the battery cells 31 are replaced. When cleaning the sealant remaining on the bottom plate 2 and the cross beam 13, the foam layer, insulating sheet and plastic plate remaining on the bottom plate 2 and the cross beam 13 also need to be removed.

[0094] After the replacement of the battery cell 31 is completed, the foam layer, the insulating sheet and the plastic plate are re-arranged on the outer wall surface of the battery cell group 3 after the replacement of the battery cell 31, the cleaned bottom plate 2 and the cleaned cross beam 13. Then the battery cell group 3 and the bottom plate 2 are reinstalled between adjacent cross beams 13.

[0095] In some embodiments, the battery pack repair method of the embodiment of the present invention further includes reinstalling the top pressing assembly 4 to the top of the frame assembly 1 after step S4.

[0096] The following describes a maintenance tool according to an embodiment of the present invention.

[0097] The maintenance tool of the embodiment of the present invention is used to implement the battery pack maintenance method of the embodiment of the present invention.

[0098] like Figure 1-Figure 7As shown, the maintenance tool of the embodiment of the present invention includes a tool platform 21, a bracket 22 and a telescopic device 23.

[0099] The bracket 22 is arranged on the tooling platform 21, and the top of the bracket 22 has a connecting piece 221 for detachably connecting the frame assembly 1. For example, Figure 1 and Figure 2 As shown, the tooling platform 21 is horizontally arranged, and a bracket 22 is provided on the top surface of the tooling platform 21 for supporting the first longitudinal beam 11 and the second longitudinal beam 12. A connecting member 221 such as a bolt is provided on the top of the bracket 22 for detachably connecting the corresponding first longitudinal beam 11 or the corresponding second longitudinal beam 12, thereby fixing the frame assembly 1. It can be understood that the connecting member is not limited to a bolt, and in other embodiments, the connecting member is a positioning pin, a slot, a buckle, a clamping claw, etc.

[0100] The telescopic device 23 is used to be arranged on the tooling platform 21 to push the bottom plate 2 to move. Figure 1 , Figure 4-Figure 6 As shown, the telescopic device 23 is arranged on the top surface of the tooling platform 21, and is used to push the bottom plate 2 to move upward.

[0101] The maintenance tool of the embodiment of the present invention, the bracket on the tool platform is used to be detachably connected to the frame assembly to fix the frame assembly, and the telescopic device is used to be arranged on the tool platform to push the bottom plate to implement the battery pack maintenance method of the embodiment of the present invention, and has a simple structure and is easy to operate.

[0102] In some embodiments, the brackets 22 are arranged in at least two rows at intervals, and the brackets 22 are arranged in a lateral direction (such as Figure 1 anteroposterior direction) and / or longitudinal direction (as shown Figure 1 The left and right directions shown are movable.

[0103] like Figure 1 As shown, the brackets 22 are arranged in at least two rows, preferably two rows, along the front-to-back direction, wherein one row of brackets 22 is used to support the first longitudinal beam 11, and the other row of brackets 22 is used to support the second longitudinal beam 12. Each row of brackets 22 includes a plurality of brackets 22 arranged in a spaced relationship along the left-right direction, and each bracket 22 has a connecting member 221 such as a bolt at the top.

[0104] The tooling platform 21 is provided with a plurality of strip holes 211 corresponding to each bracket 22 , the strip holes 211 extend in the left-right direction, and the plurality of strip holes 211 are arranged at intervals in the front-back direction. The bottom of the bracket 22 is provided with bolts for passing through the strip holes 211 .

[0105] Placing the bracket 22 and the bolts at the bottom at different strip holes 211 can change the position of the bracket 22 relative to the tooling platform 21 along the front-to-back direction, so that the bracket 22 can be aligned with and support the corresponding first longitudinal beam 11 or the corresponding second longitudinal beam 12. Furthermore, the distance between the two rows of brackets 22 can be adjusted to support battery packs 10 of various sizes and models with different distances between the first longitudinal beam 11 and the second longitudinal beam 12.

[0106] When the bolts at the bottom of the bracket 22 are loosened, the bracket 22 can move along the strip hole 211 to change the position of the bracket 22 relative to the tooling platform 21 along the direction of action, thereby ensuring the stability of the battery pack 10 when supported, while avoiding the protrusions at the bottom of the corresponding first longitudinal beam 11 or the corresponding second longitudinal beam 12 and protruding parts such as bolts.

[0107] It is understandable that the bracket is not limited to changing the position relative to the tooling platform through the bar-shaped hole. In other embodiments, a guide rail is provided on the top of the tooling platform, and the bracket is provided on the guide rail and is movable along the guide rail.

[0108] In some embodiments, the telescopic device 23 is detachably connected to the tooling platform 21 and is movable relative to the tooling platform 21 along the longitudinal direction of the frame assembly 1. The top of the telescopic device 23 has an abutment plate 231, which extends along the length direction of the base plate 2 and is used to abut the base plate 2.

[0109] like Figure 1 As shown, the telescopic device 23 is detachably connected to the tooling platform 21 by means of slots, bolts, etc., and can be connected to different positions of the tooling platform 21 along the left and right directions. Therefore, after the bracket 22 supports and fixes the frame assembly 1, the telescopic device 23 is placed on the tooling platform 21, and the position of the telescopic device 23 is adjusted at the same time so that the telescopic device 23 is located below the bottom plate 2 carrying the battery cell group 3 to be removed, and then the telescopic device 23 is connected to the tooling platform 21 to prevent the telescopic device 23 from moving. After the telescopic device 23 is connected to the tooling platform 21, the telescopic device 23 is driven to abut against the bottom plate 2 and push the bottom plate 2 to move upward.

[0110] The top of the telescopic device 23 has an abutment plate 231 extending in the front-to-back direction. The length of the abutment plate 231 in the front-to-back direction is less than or equal to the length of the base plate 2 between the first longitudinal beam 11 and the second longitudinal beam 12, and is preferably equal. The width of the abutment plate 231 in the left-right direction is less than or equal to the width of the base plate 2, thereby being able to push the base plate 2 to move upward smoothly.

[0111] Preferably, the telescopic device 23 has a base 232 extending in the front-to-back direction, the length and width of the base 232 are substantially consistent with the abutment plate 231 to ensure the stability of the telescopic device 23, and the base 232 is detachably connected to the tooling platform 21 by means of a slot, bolts, etc.

[0112] The telescopic device 23 is preferably, but not limited to, a jack.

[0113] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to 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.

[0114] In addition, the terms "first" and "second" are only used for distinction, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0115] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0116] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0117] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0118] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A battery pack maintenance method, characterized in that: include: S1, a frame assembly (1) for fixing a battery pack (10); S2, the frame assembly (1) comprises a plurality of cross beams (13) arranged at intervals, pushing a bottom plate (2) located between adjacent cross beams (13) in the battery pack (10) so that at least a portion of the battery cell group (3) carried by the bottom plate (2) protrudes; S3, taking out the protruding battery cell group (3).

2. The battery pack repair method according to claim 1, characterized in that: Step S1 specifically includes: The first longitudinal beam (11) and the second longitudinal beam (12) of the frame assembly (1) are supported and detachably connected by a bracket (22) so that the base plate (2) is suspended in the air, and the plurality of cross beams (13) are connected between the first longitudinal beam (11) and the second longitudinal beam (12).

3. The battery pack repair method according to claim 2, characterized in that: Step S2 specifically includes: The telescopic device (23) is arranged opposite to the bottom plate (2) carrying the battery cell group (3) to be removed, and the bottom plate (2) is pushed to move between adjacent crossbeams (13) by the telescopic device (23), so as to drive at least a portion of the battery cell group (3) to be removed to protrude from other battery cell groups (3).

4. The battery pack repair method according to claim 1, characterized in that: Also includes: Before step S1, or between step S1 and step S2, the top pressing assembly (4) provided on the frame assembly (1) in the battery pack (10) is disassembled so that the side of the battery cell group (3) facing away from the bottom plate (2) is opened.

5. The battery pack repair method according to claim 1, characterized in that: Also includes: S4, replacing at least part of the battery cells (31) in the removed battery cell group (3) with new battery cells (31), and then reinstalling them between adjacent crossbeams (13), and allowing the bottom plate (2) to support the battery cell group (3).

6. The battery pack repair method according to claim 5, characterized in that: Step S4 specifically includes: The pushed bottom plate (2) is removed from between the adjacent cross beams (13), and the sealant remaining on the bottom plate (2) and the cross beams (13) is cleaned; Replacing at least part of the battery cells (31) in the removed battery cell group (3) with new battery cells (31); Re-applying sealant on the cleaned bottom plate (2) and / or the crossbeam (13); The base plate (2) that has been cleaned and / or re-sealed with sealant, and the battery cell group (3) after the battery cells (31) have been replaced, are reinstalled between adjacent beams (13), and the base plate (2) supports the battery cell group (3).

7. The battery pack repair method according to claim 6, characterized in that: The crossbeam (13) comprises a main body (132) and a crossbeam clamping platform (131), the crossbeam clamping platform (131) being arranged at the bottom of the main body (132) and extending toward another crossbeam (13) adjacent to the crossbeam (13), the side wall of the bottom plate (2) being provided with a bottom plate clamping groove, the crossbeam clamping platform (131) being fitted in the bottom plate clamping groove and being bonded to the groove wall surface of the bottom plate clamping groove by means of a sealant; The spacing between the main bodies (132) of adjacent cross beams (13) is constant and is greater than or equal to the width of the bottom plate (2), and the connected battery cell group (3) and the bottom plate (2) are sequentially pushed out from between the adjacent cross beams (13); or The main body (132) comprises a first section (1321) and a second section (1322) connected to each other. The bottom of the second section (1322) is provided with the crossbeam clamping platform (131). The spacing between adjacent second sections (1322) is greater than or equal to the width of the bottom plate (2), and the spacing between adjacent first sections (1321) is less than the width of the bottom plate (2). The bottom plate (2) is first pushed to move between adjacent second sections (1322) so that part of the battery cell group (3) protrudes. After the battery cell group (3) is taken out, one end of the bottom plate (2) is pushed along the arrangement direction of the crossbeam (13) so that the bottom plate (2) is tilted and enters between adjacent first sections (1321). Then, the bottom plate (2) between adjacent first sections (1321) is taken out.

8. The battery pack repair method according to claim 6, characterized in that: Step S4 also includes: completely cleaning at least one of the foam layer, the insulating sheet and the plastic plate on the outer wall surface of the removed battery cell group (3), then replacing at least part of the battery cells (31) in the removed battery cell group (3) with new battery cells (31), re-arranging at least one of the foam layer, the insulating sheet and the plastic plate on the outer wall surface of the battery cell group (3) after the replacement of the battery cells (31), the cleaned bottom plate (2) and the cleaned cross beam (13), and then reinstalling the battery cell group (3) after the replacement of the battery cells (31) between adjacent cross beams (13).

9. A maintenance tool for implementing the battery pack maintenance method according to any one of claims 1 to 8, characterized in that: include: Tooling platform (21); A bracket (22), the bracket (22) being arranged on the tooling platform (21), and the top of the bracket (22) being provided with a connecting piece (221) for detachably connecting to the frame assembly (1); A telescopic device (23), wherein the telescopic device (23) is arranged on the tooling platform (21) to push the bottom plate (2) to move.

10. The maintenance tool according to claim 9, characterized in that: The brackets (22) are arranged in at least two rows at intervals, and the brackets (22) are movable in the transverse direction and / or longitudinal direction of the frame assembly (1) relative to the tooling platform (21).

11. The maintenance tool according to claim 9, characterized in that: The telescopic device (23) is detachably connected to the tooling platform (21) and is movable relative to the tooling platform (21) along the longitudinal direction of the frame assembly (1). The top of the telescopic device (23) is provided with an abutment plate (231), which extends along the length direction of the base plate (2) and is used to abut against the base plate (2).

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