Battery pack maintenance method and maintenance tooling

Abstract

The battery pack maintenance method provided by the embodiment of the application comprises fixing a frame assembly of the battery pack; the frame assembly comprises a plurality of cross beams arranged at intervals; a bottom plate between adjacent cross beams in the battery pack is pushed to make at least part of a battery cell group carried by the bottom plate protrude; and the protruding battery cell group is taken out. The battery pack maintenance method provided by the embodiment of the application first fixes the frame assembly of the battery pack, then pushes the bottom plate between adjacent cross beams which carries the battery cell group to be disassembled, makes at least part of the battery cell group to be disassembled protrude from other battery cell groups, and then takes out the battery cell group to be disassembled, so that the battery cell group in the battery pack can be taken out independently, the battery cell group or the battery cell in the battery cell group can be disassembled and replaced, and the disassembly process of the battery cell group is simple and fast.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery maintenance, in particular to a battery pack maintenance method and a maintenance tool. BACKGROUND

[0002] In related technologies, 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 the battery pack needs to be reassembled. Therefore, it is not possible to independently replace some battery cells in the battery pack, and the disassembly process is complex and time-consuming. SUMMARY

[0003] The present application aims to at least partially solve one of the technical problems in the related art.

[0004] To this end, an embodiment of the present application proposes a battery pack maintenance method.

[0005] An embodiment of the present application also proposes a maintenance tool for implementing the battery pack maintenance method of the present application.

[0006] The battery pack maintenance method of the present application comprises:

[0007] S1, fixing a frame assembly of a battery pack;

[0008] S2, the frame assembly comprises a plurality of cross beams arranged at intervals, and a bottom plate in the battery pack located between adjacent cross beams is pushed to make at least part of a battery cell group carried by the bottom plate protrude;

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

[0010] The battery pack maintenance method of the present application first fixes the frame assembly of the battery pack, then pushes the bottom plate carrying the battery cell group to be disassembled and located between adjacent cross beams, so that at least part of the battery cell group to be disassembled protrudes from other battery cell groups, and then the battery cell group to be disassembled is taken out. Therefore, the battery pack maintenance method of the present application can independently take out the battery cell group in the battery pack, so as to disassemble and replace the battery cell group or the battery cells in the battery cell group. The disassembly process of the battery cell group is simple and fast.

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

[0012] The first longitudinal beam and the second longitudinal beam of the frame assembly are supported and detachably connected by a support, so that the bottom plate is suspended, 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 comprises:

[0014] The telescopic device is arranged opposite to the bottom plate carrying the battery cell group to be disassembled, and the telescopic device pushes the bottom plate to move between the adjacent beams to drive at least part of the battery cell group to be disassembled to protrude from other battery cell groups.

[0015] In some embodiments, the battery pack maintenance method further comprises:

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

[0017] In some embodiments, the battery pack maintenance method further comprises:

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

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

[0020] The pushed bottom plate is removed from between the adjacent beams, and the sealant remaining on the bottom plate and the beams is cleaned;

[0021] At least part of the battery cells in the removed battery cell group are replaced with new battery cells;

[0022] Sealant is re-applied on the cleaned bottom plate and / or beams;

[0023] The cleaned bottom plate and / or the battery cell group with replaced battery cells are reinstalled between the adjacent beams and the bottom plate carries the battery cell group.

[0024] In some embodiments, the beam comprises a main body and a beam clamping table, the beam clamping table is arranged at the bottom of the main body and extends towards another beam adjacent to the beam, the side wall of the bottom plate is provided with a bottom plate clamping groove, and the beam clamping table is fitted in the bottom plate clamping groove and connected to the groove wall surface of the bottom plate clamping groove through sealant bonding.

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

[0026] The main body has a first section and a second section connected thereto, the bottom of the second section is provided with the beam clamping table, the spacing between adjacent second sections is greater than or equal to the width of the bottom plate, 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 the battery cell group is taken out, the end of the bottom plate along the arrangement direction of the beam is pushed 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 further comprises: cleaning all of at least one of the foam layer, the insulating sheet and the plastic plate on the outer wall surface of the taken-out battery cell group, then replacing at least part of the battery cells in the taken-out battery cell group with new battery cells, re-providing at least one of the foam layer, the insulating sheet and the plastic plate on the outer wall surface of the battery cell group after the battery cells are replaced, the cleaned bottom plate and the cleaned beam, and re-installing the battery cell group after the battery cells are replaced between adjacent beams.

[0028] The maintenance tooling of the embodiment of the present application comprises:

[0029] A tooling platform;

[0030] A support provided on the tooling platform, the top of the support being provided with a connecting piece for detachably connecting the frame assembly;

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

[0032] The maintenance tooling of the embodiment of the present application, the support on the tooling platform is used for detachably connecting with the frame assembly to fix the frame assembly, and the telescopic device is used for being provided on the tooling platform to push the bottom plate, so as to implement the battery pack maintenance method of the embodiment of the present application, and the structure is simple and the operation is convenient.

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

[0034] In some embodiments, the telescopic device is detachably connected with the tooling platform and is movable relative to the tooling platform along the longitudinal direction of the frame assembly, and the top of the telescopic device is provided with an abutting plate extending along the length direction of the bottom plate and used for abutting against the bottom plate. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a schematic view of the maintenance tooling of the embodiment of the present application;

[0036] Figure 2is a maintenance tool embodiment of the present application is a schematic diagram of a battery pack maintenance method embodiment of the present application Figure One ;

[0037] Figure 3 is Figure 2 is a partial enlarged schematic diagram of the maintenance tool in the middle

[0038] Figure 4 is a maintenance tool embodiment of the present application is a schematic diagram of a battery pack maintenance method embodiment of the present application Figure Two ;

[0039] Figure 5 is a maintenance tool embodiment of the present application is a schematic diagram of a battery pack maintenance method embodiment of the present application Figure Three ;

[0040] Figure 6 is a maintenance tool embodiment of the present application is a schematic diagram of a battery pack maintenance method embodiment of the present application Figure Four ;

[0041] Figure 7 is a maintenance tool embodiment of the present application is a schematic diagram of a battery pack maintenance method embodiment of the present application Figure Five .

[0042] Reference signs:

[0043] 10, battery pack; 1, frame assembly; 11, first longitudinal beam; 12, second longitudinal beam; 13, cross beam; 131, cross beam clamping table; 132, main body; 1321, first section; 1322, second section; 2, bottom plate; 3, electric core group; 31, electric core; 4, top pressing assembly;

[0044] 20, maintenance tool; 21, tool platform; 211, strip-shaped hole; 22, support; 221, connecting piece; 23, telescopic device; 231, abutting plate; 232, base. DETAILED DESCRIPTION

[0045] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0046] The battery pack maintenance method and maintenance tool according to the embodiments of the present application are described below with reference to Figures 1-7 .

[0047] It should be noted that the battery pack maintenance method of the embodiment of the present application is based on the battery pack 10 which preferably but not limitedly comprises a frame assembly 1, a bottom plate 2 and a cell group 3, the frame assembly 1 comprises a plurality of beams 13 arranged at intervals, the bottom plate 2 is arranged between adjacent beams 13, and the cell group 3 is arranged between at least some adjacent beams 13, and the cell group 3 is carried on the bottom plate 2.

[0048] For example, as shown in Figures 2-7 , the beam 13 extends in the front-rear direction and is arranged at intervals in the left-right direction. The bottom plate 2 is arranged between the bottom of each adjacent beam 13, the bottom plate 2 is preferably a strip-shaped plate extending in the front-rear direction, and the bottom plate 2 is detachable from the bottom of the beam 13. Preferably, the cell group 3 is arranged between the remaining adjacent beams 13 except the leftmost adjacent beam 13 and the rightmost adjacent beam 13, and the cell group 3 is carried on the corresponding bottom plate 2. It can be understood that in other embodiments, the corresponding cell group 3 can be arranged between all adjacent beams 13.

[0049] The battery pack maintenance method according to the embodiment of the present application is described below.

[0050] As shown in Figures 2-7 , the battery pack maintenance method of the embodiment of the present application comprises steps S1, S2 and 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 connecting member 211 such as a bolt, or the frame assembly 1 is clamped and fixed by a clamping device such as a mechanical hand and a clamping jaw, or the frame assembly 1 is clamped and fixed by a clamping device such as a buckle.

[0052] S2, the frame assembly 1 comprises a plurality of beams 13 arranged at intervals, and the bottom plate 2 between the adjacent beams 13 in the battery pack 10 is pushed to make at least part of the cell group 3 carried by the bottom plate 2 protrude. For example, as shown in Figures 4-6 , the cell group 3 to be removed and the bottom plate carrying it are pushed upward to make at least the top of the cell group 3 to be removed protrude upward from other cell groups 3 in the battery pack 10.

[0053] S3, the protruding cell group 3 is taken out. For example, the cell group 3 to be removed is directly pushed out from between the adjacent beams 13 by pushing the bottom plate 2 and taken away, or the clamping device such as the mechanical hand and the clamping jaw clamps the top of the protruding cell group 3, and then the cell group 3 is pulled out from between the adjacent beams 13 and taken away.

[0054] The battery pack maintenance method of the embodiment of the application first fixes the frame assembly of the battery pack, then pushes the bottom plate carrying the to-be-detached battery cell group and located between adjacent cross beams, so that the bottom plate drives at least part of the to-be-detached battery cell group to protrude from other battery cell groups, and then the to-be-detached battery cell group is taken out. Therefore, the battery pack maintenance method of the embodiment of the application can independently take out the battery cell group in the battery pack, so that the battery cell group or the battery cell in the battery cell group can be removed and replaced, and the process of detaching the battery cell group is simple and fast.

[0055] In some embodiments, step S1 specifically comprises supporting and detachably connecting the first longitudinal beam 11 and the second longitudinal beam 12 of the frame assembly 1 by the support 22 to make the bottom plate 2 suspended, and the plurality of cross beams 13 are all connected between the first longitudinal beam 11 and the second longitudinal beam 12.

[0056] As shown in Figures 2-5 , the frame assembly 1 of the battery pack 10 further comprises the first longitudinal beam 11 and the second longitudinal beam 12. Preferably, the first longitudinal beam 11 and the second longitudinal beam 12 both extend along the left-right direction and are arranged at intervals along the front-rear direction. The cross beam 13 extends along the front-rear direction and is connected between the first longitudinal beam 11 and the second longitudinal beam 12. The plurality of cross beams 13 are arranged at intervals along the left-right direction and are connected between the first longitudinal beam 11 and the second longitudinal beam 12. The bottom plate 2 is detachable from the bottom of the first longitudinal beam 11 and the bottom of the second longitudinal beam 12.

[0057] In step S1, the frame assembly 1 is placed on the support 22 and the bottom plate 2 is suspended, so that the bottom of the bottom plate 2 has a space for pushing the bottom plate 2. Then, the first longitudinal beam 11 and the second longitudinal beam 12 are both detachably connected with the support 22, preferably but not limited to being detachably connected by a connecting member 211 such as a bolt, so as to fix the frame assembly 1.

[0058] It can be understood that the structure of the support is not limited to the structure as shown in Figure 1 and Figure 2 .

[0059] It can be understood that the frame assembly is not limited to being fixed on the support. In other embodiments, the frame assembly is fixed by a clamping device such as a mechanical hand and a clamping jaw.

[0060] The frame assembly 1 is fixed on the support 22, so that the bottom of the bottom plate 2 has a space for pushing the bottom plate 2, while avoiding the movement of the frame assembly 1 when the bottom plate 2 is subsequently pushed.

[0061] In some embodiments, step S2 specifically comprises oppositely arranging the telescopic device 23 with the bottom plate 2 carrying the to-be-detached battery cell group 3, and pushing the bottom plate 2 to move between adjacent cross beams 13 by the telescopic device 23, so as to drive at least part of the to-be-detached battery cell group 3 to protrude from other battery cell groups 3.

[0062] AsFigures 2-5 As shown in step S2, the telescopic device 23 is arranged opposite to the bottom plate 2 carrying the battery cell group 3 to be disassembled, and then the telescopic device 23 is driven to move telescopically to abut against the bottom plate 2 and push the bottom plate 2 to move upward between the adjacent cross beams 13, thereby driving at least the top of the battery cell group 3 to be disassembled 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, which makes the bottom plate 2 and the battery cell group 3 move smoothly and with small impact force, so that the bottom plate 2 and the battery cell group 3 are not damaged.

[0065] It can be understood that the bottom plate is not limited to be pushed by the telescopic device, and in other embodiments, the bottom plate is pushed by a mechanical hand or manually, for example, the bottom plate is manually hammered to push the bottom plate.

[0066] In some embodiments, the battery pack maintenance method of the embodiments of the present application further comprises, before step S1, or between step S1 and step S2, disassembling the top pressing assembly 4 provided on the frame assembly 1 in the battery pack 10 to open the side of the battery cell group 3 away from the bottom plate 2.

[0067] As shown in step S2, the telescopic device 23 is arranged opposite to the bottom plate 2 carrying the battery cell group 3 to be disassembled, and then the telescopic device 23 is driven to move telescopically to abut against the bottom plate 2 and push the bottom plate 2 to move upward between the adjacent cross beams 13, thereby driving at least the top of the battery cell group 3 to be disassembled to protrude from other battery cell groups 3. Figure 2 As shown, the battery pack 10 further comprises a top pressing assembly 4 provided on the top of the frame assembly 1, the top pressing assembly 4 is used to abut against the top of the battery cell group 3, thereby cooperating with the bottom plate 2 to limit the position of the battery cell group 3 in the up-down direction, and the top pressing assembly 4 preferably but not limited to comprises a pressing strip and a cover plate (not shown in the figure), the pressing strip is connected to the top of the adjacent cross beams 31 with the battery cell group 3 arranged 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 cross 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 both detachably connected with the support 22, the top pressing assembly 4 is disassembled from the top of the frame assembly 1 to open the top of the battery cell group 3, so as to facilitate the top of the battery cell group 3 to be disassembled to protrude upward from other battery cell groups 3, and facilitate the battery cell group 3 to be disassembled to be taken out. Step S2 is performed after the top pressing assembly 4 is disassembled, in other words, the telescopic device 23 pushes the bottom plate 2 to move after the top pressing assembly 4 is disassembled.

[0069] It can be understood that the top pressing assembly is not limited to be disassembled between step S1 and step S2, and in other embodiments, the top pressing assembly is disassembled before step S1, in other words, the top pressing assembly is disassembled first, and then the frame assembly is placed on the support and connected.

[0070] In some embodiments, the battery pack maintenance method of the embodiments of the present application further comprises 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 re-installing the battery cell group 3 between the adjacent cross beams 13, and making the base plate 2 carry the battery cell group 3.

[0072] Specifically, after the battery cell group 3 to be disassembled is removed, the disassembling work of the battery cell group 3 of the battery pack 10 is completed. At this time, the pushed base plate 2 can be disassembled or reset, and then the battery pack 10 can be used in a state of lacking the battery cell group 3. Also, all of the battery cells 31 in the removed battery cell group 3 can be replaced with new battery cells 31, or part of the damaged battery cells 31 in the battery cell group 3 can be replaced with new battery cells 31, and then the battery cell group 3 with the replaced battery cells 31 is re-installed between the adjacent cross beams 13, while the pushed base plate 2 is reset and carries the battery cell group 3 with the replaced battery cells 31, so that a replacement work of the battery cell group 3 of the battery pack 10 is performed, and then the battery pack 10 can be used in a state of the replaced battery cells 31. Preferably, after the disassembling work of the battery cell group 3 of the battery pack 10 is completed, at least part of the battery cells 31 in the battery cell group 3 are replaced with new battery cells 31.

[0073] In some embodiments, the step S4 specifically includes removing the pushed base plate 2 from between the adjacent cross beams 13, and cleaning the sealant remaining on the base plate 2 and the cross beams 13. At least part of the battery cells 31 in the removed battery cell group 3 are replaced with new battery cells 31. The sealant is re-applied on the cleaned base plate 2 and / or the cross beams 13. The cleaned base plate 2 with / without the re-applied sealant and the battery cell group 3 with the replaced battery cells 31 are re-installed between the adjacent cross beams 13, and the base plate 2 carries the battery cell group 3.

[0074] Specifically, the side wall surface of the base plate 2 and the bottom of the cross beam 13 are connected by the sealant, and the adhesion strength of the sealant does not hinder the disassembly of the base plate 2. When the base plate 2 is pushed, the sealant between the base plate 2 and the cross beam 13 is torn and adheres to the base plate 2 and the cross beam 13.

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

[0076] Then the sealant is re-applied on the side wall surface of the cleaned base plate 2 and the bottom of the cross beam 13, and the base plate 2 with the re-applied sealant and the battery cell group 3 with the replaced battery cells 31 are re-installed between the adjacent cross beams 13, so that the base plate 2 is adhered between the bottoms of the adjacent cross beams 13 and carries the battery cell group 3.

[0077] It is understood that the base plate and crossbeams are not limited to having sealant applied to both. In other embodiments, sealant is applied only to the sidewalls of the base plate, or only to the bottom of the crossbeams. When sealant is applied only to the bottom of the crossbeams, the cleaned base plate and the battery pack with the replaced cells are reinstalled between the adjacent crossbeams.

[0078] In some embodiments, the crossbeam 13 includes a main body 132 and a crossbeam mounting platform 131. The crossbeam mounting platform 131 is located at the bottom of the main body 132 and extends toward another crossbeam 13 adjacent to the crossbeam 13. The side wall of the bottom plate 2 is provided with a bottom plate groove. The crossbeam mounting platform 131 is fitted into the bottom plate groove and is bonded to the groove wall surface of the bottom plate groove by a sealant.

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

[0080] Both the left and right sides of the base plate 2 are provided with base plate slots, and the base plate slots are formed on the bottom surface of the base plate 2. The right-extending beam bracket 131 of the left end beam 13 of the base plate 2 is fitted into the base plate slot on the left side of the base plate 2, and the left-extending beam bracket 131 of the right end beam 13 of the base plate 2 is fitted into the base plate slot on the right side of the base plate 2, thereby supporting the base plate 2 and making the base plate 2 detachably connected between the bottoms of the adjacent beams 13.

[0081] The sealant is applied between the crossbeam mounting plate 131 and the groove wall of the base plate mounting slot.

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

[0083] Specifically, the width of the main body 132 in the left-right direction is constant, so the distance between the main bodies 132 of the adjacent crossbeams 13 is constant. The distance between the adjacent main bodies 132 is greater than or equal to the width of the base plate 2 in the left-right direction, so that the base plate 2 can move up and down between the adjacent main bodies 132 in a horizontal posture. Therefore, when the base plate 2 is pushed to move, the base plate 2 together with the battery cell assembly 3 it carries can be directly pushed out from between the adjacent crossbeams 13, so as to remove the base plate 2 and the battery cell assembly 3.

[0084] It can be understood that when reinstalling the bottom plate 2 to the bottom of the adjacent cross beams 13, the bottom plate 2 is placed in a horizontal posture between the adjacent main bodies 132 and is moved downward to between the adjacent cross beam clamping tables 131. The battery cell group 3 after replacing the battery cell 31 can be reinstalled together with the bottom plate 2, or can be installed after the installation of the bottom plate 2 is completed.

[0085] In the example as shown in Figure 5 and Figure 6 The main body 132 has the first section 1321 and the second section 1322 connected thereto, the bottom of the second section 1322 is provided with the cross beam clamping table 131, the spacing between the adjacent second sections 1322 is greater than or equal to the width of the bottom plate 2, the spacing between the adjacent first sections 1321 is less than the width of the bottom plate 2, the bottom plate 2 is first pushed to move between the adjacent second sections 1322 so that part of the battery cell group 3 protrudes, after the battery cell group 3 is taken out, the bottom plate 2 is pushed at one end along the arrangement direction of the cross beam 13 so that the bottom plate 2 is inclined and enters between the adjacent first sections 1321, and then the bottom plate 2 between the adjacent first sections 1321 is taken out.

[0086] Specifically, the main body 132 includes the first section 1321 and the second section 1322 connected in sequence in the vertical direction, the first section 1321 is located at the upper end of the second section 1322, and the bottom of the second section 1322 is provided with the cross beam clamping table 131.

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

[0088] When the bottom plate 2 is pushed to move, the bottom plate 2 is first pushed to move in a horizontal posture between the adjacent second sections 1322, so that the top of the carried battery cell group 3 protrudes, the battery cell group 3 is taken out from between the adjacent cross beams 13 in a manner such as pulling through the part of the battery cell group 3 protruding, then the left end or the right end of the bottom plate 2 is pushed again, for example, the position of the telescopic device 23 is adjusted so that the telescopic device 23 moves from the middle of the bottom plate 2 in the left-right direction to the left end or the right end of the bottom plate 2, then the bottom plate 2 is pushed again through the telescopic device 23, or the left end or the right end of the bottom plate 2 is manually pushed, so that the bottom plate 2 rotates around the left-right direction to be inclined and can enter between the adjacent first sections 1321, the bottom plate 2 in the inclined posture is captured from the top of the adjacent cross beams 13 by manually or tools such as clamps, suction cups and the like to extend between the adjacent cross beams 13, so that the bottom plate 2 is taken out from between the adjacent cross beams 13.

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

[0090] It can be understood that, when reinstalling the bottom plate 2 between the bottom of the adjacent cross beams 13, the bottom plate 2 is first placed in an inclined posture between the adjacent first sections 1321 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 cross beam clamping tables 131. The battery cell group 3 after replacing the battery cell 31 needs to be installed again after the installation of the bottom plate 2 is completed.

[0091] In some embodiments, step S4 further comprises cleaning all of 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 cell 31 in the removed battery cell group 3 with a new battery cell 31, and re-installing the battery cell group 3 after replacing the battery cell 31 between the adjacent cross beams 13.

[0092] As shown in FIG. 1, the battery pack 10 further comprises at least one of a foam layer, an insulating sheet and a plastic plate, preferably, the cross beam 13 and the battery cell group 3 are provided with the foam layer and the insulating sheet, or the foam layer and the plastic plate, or the insulating sheet, and the bottom plate 2 and the battery cell group 3 are provided with the insulating sheet. Figures 4-7

[0093] Before replacing at least part of the battery cell 31 in the removed battery cell group 3 with a new battery cell 31, the foam layer, the insulating sheet and the plastic plate remaining on the removed battery cell group 3 are removed, and then the battery cell 31 is replaced. When cleaning the sealant remaining on the bottom plate 2 and the cross beam 13, the foam layer, the insulating sheet and the 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-installed on the outer wall surface of the battery cell group 3 after replacing 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 re-installed between the adjacent cross beams 13.

[0095] In some embodiments, the battery pack maintenance method of the embodiments of the present application further comprises re-installing the top pressing assembly 4 to the top of the frame assembly 1 after step S4.

[0096] The maintenance tool according to the embodiments of the present application is described below.

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

[0098] As shown in FIG. 1, the battery pack 10 further comprises at least one of a foam layer, an insulating sheet and a plastic plate, preferably, the cross beam 13 and the battery cell group 3 are provided with the foam layer and the insulating sheet, or the foam layer and the plastic plate, or the insulating sheet, and the bottom plate 2 and the battery cell group 3 are provided with the insulating sheet. Figures 1-7 ​As shown, the repair tool of the embodiment of the present application comprises a tool platform 21, a support 22 and a telescopic device 23.

[0099] The support 22 is arranged on the tool platform 21, and the top of the support 22 is provided with a connecting piece 221 for detachably connecting the frame assembly 1. For example, as shown in Figure 1 and Figure 2 shown, the tool platform 21 is horizontally arranged, and the top surface of the tool platform 21 is provided with the support 22 for supporting the first longitudinal beam 11 and the second longitudinal beam 12. The top of the support 22 is provided with a connecting piece 221 such as a bolt for detachably connecting the corresponding first longitudinal beam 11 or the corresponding second longitudinal beam 12, so as to fix the frame assembly 1. It can be understood that the connecting piece is not limited to the bolt, and in other embodiments, the connecting piece is a positioning pin, a clamping groove, a buckle, a clamping jaw, etc.

[0100] The telescopic device 23 is arranged on the tool platform 21 to push the bottom plate 2 to move. For example, as shown in Figure 1 , Figures 4-6 shown, the telescopic device 23 is arranged on the top surface of the tool platform 21 to push the bottom plate 2 to move upward.

[0101] The repair tool of the embodiment of the present application, the support on the tool platform is used for detachably connecting with the frame assembly to fix the frame assembly, and the telescopic device is arranged on the tool platform to push the bottom plate, so as to implement the battery pack repair method of the embodiment of the present application, and the structure is simple and the operation is convenient.

[0102] In some embodiments, the supports 22 are at least two rows arranged at intervals, and the supports 22 are movable relative to the tool platform 21 along the transverse direction (e.g., the front-rear direction as shown in Figure 1 ) and / or the longitudinal direction (e.g., the left-right direction as shown in Figure 1 ).

[0103] As shown in Figure 1 , the supports 22 are at least two rows arranged at intervals along the front-rear direction, and preferably two rows. One row of supports 22 is used for supporting the first longitudinal beam 11, and the other row of supports 22 is used for supporting the second longitudinal beam 12. Each row of supports 22 comprises a plurality of supports 22 arranged at intervals along the left-right direction, and the top of each support 22 is provided with a connecting piece 221 such as a bolt.

[0104] The tool platform 21 is provided with a plurality of strip-shaped holes 211 corresponding to each support 22, respectively. The strip-shaped holes 211 extend along the left-right direction, and the plurality of strip-shaped holes 211 are arranged at intervals along the front-rear direction. The bottom of the support 22 is provided with a bolt for being arranged in the strip-shaped hole 211.

[0105] The bolts at the bottom of the bracket 22 and the bottom are arranged at different strip-shaped holes 211, which can change the position of the bracket 22 relative to the tool platform 21 along the front-back direction, so that the bracket 22 can be aligned and support the corresponding first longitudinal beam 11 or the corresponding second longitudinal beam 12, and further adjust the distance between the two rows of brackets 22 to support the battery pack 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-shaped hole 211 to change the position of the bracket 22 relative to the tool platform 21 along the action direction, to ensure the stability of the battery pack 10 when it is supported, while avoiding the protrusions at the bottom of the corresponding first longitudinal beam 11 or the corresponding second longitudinal beam 12 and the protruding components such as bolts.

[0107] It can be understood that the bracket is not limited to changing the position relative to the tool platform through the strip-shaped hole, and in other embodiments, the tool platform top is provided with a guide rail, and the bracket is arranged on the guide rail and is movable along the guide rail.

[0108] In some embodiments, the telescopic device 23 is detachably connected with the tool platform 21 and is movable relative to the tool platform 21 along the longitudinal direction of the frame assembly 1, and the top of the telescopic device 23 is provided with an abutting plate 231 extending along the length direction of the bottom plate 2 and used for abutting the bottom plate 2.

[0109] As shown in Figure 1 , the telescopic device 23 is detachably connected with the tool platform 21 through a clamping groove, a bolt or the like, and can be connected at different positions of the tool platform 21 along the left-right direction, so that after the bracket 22 supports and fixes the frame assembly 1, the telescopic device 23 is placed on the tool platform 21, and the position of the telescopic device 23 is adjusted so that the telescopic device 23 is located below the bottom plate 2 carrying the battery cell group 3 to be detached, and then the telescopic device 23 is connected with the tool platform 21 to avoid the telescopic device 23 from moving, and after the telescopic device 23 is connected with the tool platform 21, the telescopic device 23 is driven to abut the bottom plate 2 and push the bottom plate 2 to move upward.

[0110] The top of the telescopic device 23 is provided with an abutting plate 231 extending along the front-back direction, and the length of the abutting plate 231 along the front-back direction is less than or equal to the length of the bottom plate 2 between the first longitudinal beam 11 and the second longitudinal beam 12, and is preferably equal, and the width of the abutting plate 231 along the left-right direction is less than or equal to the width of the bottom plate 2, so that the bottom plate 2 can be pushed to move upward stably.

[0111] Preferably, the telescopic device 23 has a base 232 extending along the front-back direction, and the length and width of the base 232 are substantially the same as those of the abutting plate 231 to ensure the stability of the telescopic device 23, and the base 232 is detachably connected with the tool platform 21 through a clamping groove, a bolt or the like.

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

[0113] In the description of the application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0114] In addition, the terms "first", "second" are only used for differentiation, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0115] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0116] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0117] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terminology "comprising" is used in the disclosure as comprising but not limited to, that is, it is open-ended and does not exclude the presence of additional features, structures, materials, or characteristics.

[0118] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present disclosure, and the ordinary skilled person in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present disclosure.

Claims

1. A method of repairing a battery pack, characterized by, The method comprises the following steps: S1, fixing a frame assembly (1) of a battery pack (10); S2, the frame assembly (1) comprises a plurality of beams (13) arranged at intervals, and a bottom plate (2) in the battery pack (10) located between adjacent beams (13) is pushed to make at least part of the battery cell group (3) carried by the bottom plate (2) protrude; the beam (13) comprises a main body (132) and a beam clamping table (131), the beam clamping table (131) is arranged at the bottom of the main body (132) and extends towards another adjacent beam (13), the side wall of the bottom plate (2) is provided with a bottom plate clamping groove, and the beam clamping table (131) is matched in the bottom plate clamping groove and connected with the groove wall surface of the bottom plate clamping groove through sealing glue bonding; S3, the protruding battery cell group (3) is taken out; Step S1 specifically comprises: The first longitudinal beam (11) and the second longitudinal beam (12) of the frame assembly (1) are supported and detachably connected through the support (22), so that the bottom plate (2) is suspended, and a plurality of beams (13) are connected between the first longitudinal beam (11) and the second longitudinal beam (12).

2. The battery pack repair method according to claim 1, characterized by, Step S2 specifically comprises: The telescopic device (23) is arranged opposite to the bottom plate (2) carrying the battery cell group (3) to be disassembled, and the bottom plate (2) is pushed to move between adjacent beams (13) through the telescopic device (23), so that at least part of the battery cell group (3) to be disassembled protrudes from other battery cell groups (3).

3. The battery pack repair method of claim 1, wherein, Further comprising: Before step S1, or between step S1 and step S2, disassemble the top pressing assembly (4) arranged in the frame assembly (1) of the battery pack (10), so that the side of the battery cell group (3) away from the bottom plate (2) is open.

4. The battery pack repair method of claim 1, wherein Further comprising: S4, at least part of the battery cell (31) in the taken-out battery cell group (3) is replaced with a new battery cell (31), and then reinstalled between adjacent beams (13), and the bottom plate (2) carries the battery cell group (3).

5. The battery pack repair method according to claim 4, characterized by, Step S4 specifically comprises: The pushed bottom plate (2) is taken out from between adjacent beams (13), and the remaining sealing glue on the bottom plate (2) and the beam (13) is cleaned; At least part of the battery cell (31) in the taken-out battery cell group (3) is replaced with a new battery cell (31); Sealing glue is re-set on the cleaned bottom plate (2) and / or the beam (13); The cleaned bottom plate (2) and / or the beam (13) after re-setting the sealing glue, and the battery cell group (3) after replacing the battery cell (31) are reinstalled between adjacent beams (13), and the bottom plate (2) carries the battery cell group (3).

6. The battery pack repair method according to claim 5, characterized by, The distance between the main bodies (132) of adjacent beams (13) is constant and 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 adjacent beams (13); or The main body (132) has a first section (1321) and a second section (1322) connected thereto, the bottom of the second section (1322) is provided with the beam clamping table (131), the distance between adjacent second sections (1322) is greater than or equal to the width of the bottom plate (2), and the distance between adjacent first sections (1321) is less than the width of the bottom plate (2). First, push the bottom plate (2) to move between adjacent second sections (1322) to make part of the battery cell group (3) protrude, after taking out the battery cell group (3), push the bottom plate (2) to one end of the arrangement direction of the beam (13), so that the bottom plate (2) is inclined and enters between adjacent first sections (1321), and then the bottom plate (2) between adjacent first sections (1321) is taken out.

7. The battery pack repair method according to claim 5, characterized by, Step S4 further comprises: cleaning all of at least one of the foam layer, the insulating sheet and the plastic plate on the outer wall surface of the taken-out battery cell group (3), then replacing at least part of the battery cells (31) in the taken-out battery cell group (3) with new battery cells (31), and re-providing 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 replacing the battery cells (31), the cleaned bottom plate (2) and the cleaned beam (13), and then reinstalling the battery cell group (3) after replacing the battery cells (31) between adjacent beams (13).

8. A repair tool for implementing the battery pack repair method of any one of claims 1-7, characterized by, Comprise: A tooling platform (21); A support (22) provided on the tooling platform (21), the top of the support (22) has a connecting piece (221) for detachably connecting the frame assembly (1); A telescopic device (23) provided on the tooling platform (21) for pushing the bottom plate (2) to move.

9. The service tool of claim 8, wherein, The supports (22) are arranged in at least two rows, and the supports (22) are movable relative to the tooling platform (21) in the transverse and / or longitudinal direction of the frame assembly (1).

10. The service tool of claim 8, wherein, The telescopic device (23) is detachably connected with the tooling platform (21) and is movable relative to the tooling platform (21) in the longitudinal direction of the frame assembly (1), and the top of the telescopic device (23) has an abutting plate (231) extending in the length direction of the bottom plate (2) and used for abutting the bottom plate (2).

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