Battery pack

Abstract

The present application discloses a battery pack, which includes a first bracket and a second bracket for fixing a battery management system (BMS) module. The second bracket is fixed on the first bracket and is provided with a first groove. The wiring harness or other components of the battery pack are fixed in the first groove, improving the utilization rate of the limited space inside the battery pack.

Description

Technical Field

[0001] This application relates to a battery pack. Background Art

[0002] The bracket for fixing the Battery Management System (BMS) module usually needs to avoid the wiring harness inside the battery pack during installation. Affected by the installation space limitation and the wiring route of the wiring harness, the bracket generally requires reliable fixation in a narrow installation space to avoid affecting the performance of the BMS module. Usually, screws are used to fix the bracket on the outer shell or on the end plates on both sides inside the battery pack. However, when the bracket is fixed on the outer shell, screw holes need to be provided on the outer shell, which results in a decrease in the waterproof and dustproof performance of the outer shell; when the bracket is fixed on the end plates on both sides inside the battery pack, when the distance between the two end plates increases, the manufacturing cost and the fixing difficulty of the bracket increase, and it occupies a large amount of space, increasing the complexity of the wiring route of the wiring harness. Summary of the Invention

[0003] In view of this, it is necessary to provide a battery pack to solve the above problems.

[0004] An embodiment of this application provides a battery pack, including a first bracket. The battery pack further includes a second bracket for fixing the battery management system module. The second bracket is fixed on the first bracket and is provided with a first groove.

[0005] According to some embodiments of this application, the battery pack includes an adapter board connected to the battery cells. The first bracket is disposed on one side of the adapter board, and the second bracket is disposed on the other side of the adapter board.

[0006] According to some embodiments of this application, the first bracket is provided with a first through hole. The second bracket is provided with a plurality of mounting portions, and the mounting portions are provided with second through holes. The adapter board is provided with a third through hole. The battery pack further includes a bolt. The bolt passes through the first through hole and the second through hole and is connected to the third through hole to fix the second bracket, the adapter board, and the first bracket.

[0007] According to some embodiments of this application, a plurality of fixing portions are spaced apart in the first groove.

[0008] According to some embodiments of this application, the fixing portion includes a deformation portion provided on the side wall of the first groove, and a clamping portion provided at one end of the deformation portion.

[0009] According to some embodiments of this application, the fixing portion includes two deformation portions provided on the side walls of the first groove. The two deformation portions are respectively provided with clamping portions facing each other, and the fixing portions on different side walls of the first groove are symmetrically arranged.

[0010] According to some embodiments of the present application, the holding portion of at least one of the fixing portions is farther away from the bottom wall of the first groove than the other holding portions.

[0011] According to some embodiments of the present application, one end of the first groove is wider than the other end.

[0012] According to some embodiments of the present application, the second bracket further includes a plurality of pre-embedded or hot-melt nuts.

[0013] According to some embodiments of the present application, the second bracket is further provided with a second groove, the nut is accommodated in the second groove, and the bottom wall of the second groove is lower than the end surface of the nut facing away from the first bracket.

[0014] The battery pack is provided with a first groove on the second bracket, so that the wire or other components are fixed in the first groove, thereby improving the utilization rate of the limited space in the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of a battery pack with its shell disassembled according to an embodiment of the present application.

[0016] Figure 2 This is another structural schematic diagram of the battery pack when the shell is disassembled.

[0017] Figure 3 for Figure 1 Schematic diagram of the structure of the battery pack with the shell removed.

[0018] Figure 4 for Figure 1 Schematic diagram of the structure of the second bracket of the battery pack.

[0019] Figure 5 for Figure 4 Schematic diagram of the structure of the second bracket in the X direction.

[0020] Figure 6 for Figure 4 A schematic structural diagram of the second bracket from another angle.

[0021] Figure 7 for Figure 6 Schematic cross-sectional view of the second bracket along line AA.

[0022] Figure 8 for Figure 6 Schematic cross-sectional view of the second bracket along line BB.

[0023] Figure 9 for Figure 1 Schematic diagram of the structure of the battery without the second bracket.

[0024] Figure 10 forFigure 9 Schematic diagram of the battery module structure of the shown battery

[0025] Figure 11 is Figure 10 Exploded structure schematic diagram of the shown battery module

[0026] Figure 12 is Figure 10 Enlarged view of part III in

[0027] Figure 13 is Figure 10 Enlarged view of part IV in

[0028] Figure 14 Schematic diagram of the structure of the battery module installed in the housing

[0029] Figure 15 In is Figure 14 Front view of the battery module installed in the housing

[0030] Figure 16 is Figure 15 Enlarged view of part VIII in

[0031] Figure 17 is Figure 15 Enlarged view of part IX in

[0032] Figure 18 is Figure 10 Schematic diagram of the structure of the first end plate of the battery module

[0033] Figure 19 is Figure 10 Schematic diagram of the structure of the second end plate of the battery module

[0034] Description of main component symbols

[0035] Battery pack 100

[0036] Housing 1

[0037] First housing 11

[0038] First component 111

[0039] Third through hole 112

[0040] Positioning hole 113

[0041] Positioning convex part 114

[0042] Second housing 12

[0043] First positioning part 121

[0044] Second positioning part 122

[0045] The third positioning portion 123

[0046] The fourth through hole 124

[0047] The third housing 13

[0048] The battery module 2

[0049] The battery cell 20

[0050] The first end plate 21

[0051] The first mounting portion 211

[0052] The boss 212

[0053] The second end plate 22

[0054] The second mounting portion 221

[0055] The fixing strap 23

[0056] The fixing member 24

[0057] The first fixing portion 241

[0058] The first convex portion 2411

[0059] The second convex portion 2412

[0060] The base 2413

[0061] The first fixing surface 2414

[0062] The second fixing portion 242

[0063] The second fixing surface 2421

[0064] The first bracket 25

[0065] The first through hole 251

[0066] The protruding portion 252

[0067] The spacer 26

[0068] The buffer member 27

[0069] The anti-disengagement member 28

[0070] The end plate nut 29

[0071] The adapter plate 3

[0072] The third through hole 31

[0073] The second bracket 4

[0074] The bracket body 41

[0075] First groove 42

[0076] Installation part 43

[0077] Second through hole 431

[0078] Support part 433

[0079] Reinforcing rib part 435

[0080] Bolt 44

[0081] Nut 45

[0082] Second grooves 46, 46a

[0083] Bottom walls 461, 461a, 425

[0084] Side walls 463, 463a, 421, 423

[0085] Fixing parts 47, 47a

[0086] Deformation parts 471, 471a

[0087] Clamping parts 473, 473a

[0088] Zip tie buckle 48

[0089] Wire harness 5

[0090] Output end 51

[0091] Electrode 6

[0092] Connector 7

[0093] Shell insertion direction Y

[0094] First direction Z

[0095] The following specific embodiments will further illustrate the present application in combination with the above-mentioned drawings. Specific embodiments

[0096] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.

[0097] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of the present application in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0098] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0099] Please refer to Figure 1 , the battery pack 100 includes a first bracket 25 and a second bracket 4. The second bracket 4 is used to support and fix a battery management system (BMS, BATTERY MANAGEMENT SYSTEM) module (not shown in the figure). The second bracket 4 is fixed on the first bracket 25. The second bracket 4 is provided with a first groove 42. In one embodiment, the first groove 42 is used for the wiring harness 5 in the battery pack 100 to pass through, but is not limited thereto. The first groove 42 fixes the wiring harness 5 and allows the wiring harness 5 to pass through. It can be understood that in other embodiments, other electronic components or other parts for connection such as a wiring harness or a flexible circuit board can also be fixed in the first groove 42.

[0100] Please also refer to Figure 1 and Figure 2 , the battery pack 100 further includes a housing 1 and a battery module 2 and an adapter board 3 disposed in the housing 1. The housing 1 includes a first housing 11 and a second housing 12. The second housing 12 is generally a hollow structure with openings at both ends, and the first housing 11 encapsulates one side of the second housing 12. The battery module 2 is received in the inner cavity of the second housing 12. The battery module 2 includes a plurality of the first brackets 25 arranged in sequence and a plurality of battery cells 20. In one embodiment, the first bracket 25 is used to fix the battery cells 20. The adapter board 3 is disposed on one side of the plurality of first brackets 25 and is used to electrically connect the plurality of battery cells 20. The second bracket 4 is connected to some of the first brackets 25 and is located on the side of the adapter board 3 away from the plurality of first brackets 25. In one embodiment, the wiring harness 5 is a main positive line, but is not limited thereto. The output end 51 of the wiring harness 5 is connected to a connector 7. The connector 7 is fixed on the first housing 11. The other end of the wiring harness 5 opposite to the output end 51 is connected to an electrode 6. In the first embodiment, the electrode 6 is disposed on the adapter board 3, but is not limited thereto. It can be understood that the electrode 6 can also be disposed at other positions in the battery pack 100.

[0101] Please also refer to Figure 2 and Figure 3, the second bracket 4 includes a bracket body 41 and a plurality of mounting portions 43 provided on the bracket body 41. In one embodiment, the number of the mounting portions 43 is four, and every two of the four mounting portions 43 are in a group and are respectively disposed on opposite sides of the bracket body 41, but it is not limited thereto. The first bracket 25 is provided with a first through hole 251. The mounting portion 43 is provided with a second through hole 431. The adapter plate 3 is provided with a third through hole 31. The battery pack 100 further includes a bolt 44. The bolt 44 sequentially passes through the second through hole 431 and the third through hole 31 and is connected to the first through hole 251. In one embodiment, the first through hole 251 is a threaded hole, and the bolt 44 is fixed in cooperation with the threaded hole, but it is not limited thereto, and the bolt 44 can also be other fixing members. One end of the bolt 44 presses on the mounting portion 43, and the mounting portion 43 presses the adapter plate 3 on the first bracket 25, so that the adapter plate 3 is fixed between the second bracket 4 and the plurality of first brackets 25.

[0102] Please refer to Figure 4 and Figure 5 , a support portion 433 protruding from the bracket body 41 is provided on a side of the mounting portion 43 facing the first bracket 25. The support portion 433 is attached to the adapter plate 3. The mounting portion 43 is provided with two rib portions 435 located on both sides of the second through hole 431. The rib portions 435 are connected to the bracket body 41. The rib portions 435 are used to improve the strength of the mounting portion 43. It can be understood that in other embodiments, the rib portions 435 can also be omitted.

[0103] It can be understood that in other embodiments, the number of the mounting portions 43 can also be two or other numbers. The plurality of mounting portions 43 can also be disposed on the same side of the bracket body 41.

[0104] Please refer to Figure 4 , the second bracket 4 further includes a plurality of nuts 45. In one embodiment, the number of the nuts 45 is four, but it is not limited thereto. The four nuts are disposed around the bracket body 41 and are used to connect the battery management system module.

[0105] Please refer to Figure 4 and Figure 6The second bracket 4 is provided with a second groove 46 and a second groove 46a. In one embodiment, the second groove 46 and the second groove 46a are provided in the bracket body 41, respectively, on either side of the first groove 42, but the present invention is not limited thereto. Two nuts 45 are received in the second groove 46, located at the two corners of the second groove 46 away from the first groove 42; another two nuts 45 are received in the second groove 46a, located at the two corners of the second groove 46a away from the first groove 42. The bottom wall 461 of the second groove 46 and the bottom wall 461a of the second groove 46a are lower than the end surface of the nut 45 facing away from the adapter plate 3, allowing the second groove 46 and the second groove 46a to accommodate components of the battery management system module. The side walls 463 of the second groove 46 and the side walls 463a of the second groove 46a enhance the strength of the bracket body 41. It is understood that in other embodiments, the side walls 463 of the second groove 46 and the side walls 463a of the second groove 46a may be omitted.

[0106] Please also see Figure 4 and Figure 6 In one embodiment, the first groove 42 passes through both sides of the bracket body 41. The first groove 42 includes opposite side walls 421 and side walls 423. The side wall 421 partially overlaps with the side wall 463 of the second groove 46; the side wall 423 partially overlaps with the side wall 463a of the second groove 46a. One end of the first groove 42 is wider than the other end. Specifically, the side wall 421 is roughly parallel to the side wall 423. At the end of the first groove 42 close to the wiring harness 5 connected to the electrode 6, the side wall 421 bends and extends toward the side away from the side wall 423, so that the distance between the side wall 421 and the side wall 423 gradually increases. Preferably, the distance w between the parallel sections of the side wall 421 and the side wall 423 satisfies: d+2mm≤w≤d+3mm, where d is the diameter of the wiring harness 5.

[0107] It is understood that, in other embodiments, the second groove 46 and the second groove 46a may also be combined into one groove and located on one side of the first groove 42. The second groove 46 and / or the second groove 46a may also be divided into multiple grooves.

[0108] In some embodiments, the second bracket 4 is an injection-molded shell structure, and the nut 45 is pre-embedded in the second bracket 4. Preferably, the material for making the second bracket 4 includes PPO and PC+ABS, but is not limited thereto.

[0109] It can be understood that in other embodiments, the second bracket 4 can also be made of other materials. For example, the second bracket 4 is made of nylon material and is formed by machining. The nut 45 can also be hot-melted or ultrasonically implanted into the bracket body 41.

[0110] Please also refer to Figure 2 and Figure 4 , a plurality of fixing parts 47 are arranged at intervals in the first groove 42. The fixing parts 47 are used to hold the wire harness 5 in the first groove 42. The number of the fixing parts 47 is set according to the length of the first groove 42. Preferably, the distance between adjacent fixing parts 47 ranges from 35 mm to 45 mm.

[0111] Please also refer to Figure 4 and Figure 7 , the fixing part 47 includes two deformation parts 471. The two deformation parts 471 are respectively arranged on the side wall 421 and the side wall 423 of the first groove 42. The fixing parts 47 on different side walls of the first groove 42 are symmetrically arranged. Specifically, in one embodiment, the deformation part 471 is formed on the side wall 421 or the side wall 423. One end of the deformation part 471 facing the adapter plate 3 is arranged on the side wall 421 or the side wall 432, and both sides of the deformation part 471 are disconnected from the side wall 421 or the side wall 432 to be elastically deformable. The two deformation parts 471 are respectively provided with clamping parts 473 facing each other, and the two clamping parts 473 are symmetrically arranged. The two clamping parts 473 are spaced apart by a set distance, but are not limited thereto. The clamping parts 473 are pressed by the wire harness 5 to enable the two deformation parts 471 to open relatively, so as to allow the wire harness 5 to enter the first groove 42 through the two clamping parts 473. The two deformation parts 471 reset and the two clamping parts 473 abut against the wire harness 5, so that the wire harness 5 is received in the first groove 42.

[0112] It can be understood that in other embodiments, the fixing part 47 can also include one deformation part 471 and one clamping part 473. One deformation part 471 is arranged on one of the side walls of the first groove 42, and the clamping part 473 is arranged at one end of the deformation part 471 and extends towards the other side wall of the first groove 42 to be able to block the wire harness 5 in the first groove 42.

[0113] Please refer to Figure 7 , preferably, the distance h1 between the clamping part 473 and the bottom wall 425 of the first groove 42 satisfies: d + 2 mm ≤ h1 ≤ d + 3 mm, where d is the diameter of the wire harness 5.

[0114] Please also refer to Figure 4 and Figure 8, the first groove 42 is further provided with a fixing portion 47a. The fixing portion 47a is used for clamping the wire harness 5 in the first groove 42. The fixing portion 47a is located on one side of the plurality of fixing portions 47. The structure of the fixing portion 47a is substantially the same as that of the fixing portion 47. The fixing portion 47a includes two deformation portions 471 and two clamping portions 473a. The two deformation portions 471a are respectively arranged on the side walls 421 and 423 of the first groove 42, and the two deformation portions 471a are arranged facing each other. The difference between the fixing portion 47a and the fixing portion 47 is that the distance h2 between the clamping portion 473a of the fixing portion 47a and the bottom wall 425 of the first groove 42 satisfies: h2 > h1.

[0115] It can be understood that in other embodiments, the two clamping portions 473 of the fixing portion 47 can also be attached or partially overlapped, as long as the relatively open distance of the two deformation portions 471 under pressure elastic deformation is sufficient for the wire harness 5 to pass through the two clamping portions 473 and enter the first groove 42.

[0116] It can be understood that in other embodiments, the number of the fixing portions 47a can also be two or other numbers. The heights of the plurality of fixing portions 47a gradually increase to allow the output end 51 of the wire harness 5 to be evenly bent. The fixing portion 47a can also be omitted.

[0117] Please also refer to Figure 4 and Figure 5 , the second bracket 4 further includes a plurality of cable tie buckles 48. The plurality of cable tie buckles 48 are respectively arranged on both sides of the bracket body 41 and are used for limiting other wire harnesses in the battery pack 100 other than the wire harness 5.

[0118] Please refer to Figure 9 , Figure 10 and Figure 11 , the battery pack 100 further includes end plates, a fixing strap 23 and fixing members 24. The end plates include a first end plate 21 and a second end plate 22, which are respectively arranged on the two end faces of the battery module 2. The fixing strap 23 is sleeved on the battery module 2 and fixes the first end plate 21 and the second end plate 22. A positioning member is further arranged in the housing 1, and the fixing members 24 are arranged on the battery module 2. When the battery module 2 is inserted into the housing 1, the fixing members 24 cooperate with the positioning member in the housing 1 to limit the movement of the battery module 2.

[0119] Specifically, a plurality of the battery cells 20 are stacked together, and each battery cell 20 is received in the first bracket 25. The battery cell 20 is generally rectangular, and the size of the first bracket 25 matches the size of the battery cell 20. The first bracket 25 is generally a hollow rectangular frame, and the first bracket 25 is fixed on the peripheral side of the battery cell 20. The fixing belt 23 is sleeved on the outer sides of a plurality of the first brackets 25 along the direction parallel to the stacking of the battery cells 20, so as to fix the plurality of battery cells 20 together and prevent the plurality of battery cells 20 from coming loose. The first end plate 21 and the second end plate 22 are respectively disposed on the end faces of the two outermost battery cells 20 of the battery module 2. When the fixing belt 23 is sleeved on a plurality of the first brackets 25, the first end plate 21 and the second end plate 22 are also fixed in the fixing belt 23, and press the plurality of battery cells 20 under the tension of the fixing belt 23 to further fix the plurality of battery cells 20. The adapter plate 3 is fixedly disposed on the short side of the first bracket 25.

[0120] An anti-loosening member 28 is further disposed at the end of the long side of the first bracket 25. The anti-loosening member 28 is generally an elastic sheet. In one embodiment, the anti-loosening member 28 and the first bracket 25 are of an integrally formed structure. After the fixing belt 23 is sleeved on a plurality of the first brackets 25, the fixing belt 23 is pushed toward the anti-loosening member 28, so that a part of the fixing belt 23 is inserted between the outer side of the first bracket 25 and the inner side of the anti-loosening member 28. The anti-loosening member 28 restricts the movement of the fixing belt 23, thereby preventing the fixing belt 23 from falling off from the end of the first bracket 25. An isolation member 26 is further disposed between any adjacent battery cells 20 to provide an expansion space for the expansion of the battery cells 20. Specifically, in this embodiment, the isolation member 26 is a foam. When the battery cells expand, the isolation member 26 can be compressed. An isolation member 26 is also disposed between the first end plate 21 and the battery cell 20 and between the second end plate 22 and the battery cell 20.

[0121] The housing 1 further includes a third housing 13. The third housing 13 is disposed at one end of the second housing 12 away from the first housing 11, and the first housing 11 and the third housing 13 encapsulate the second housing 12. In other words, the first housing 11 and the third housing 13 serve as end caps of the second housing 12. A buffer member 27 is disposed between the first end plate 21 and the first housing 11 and is disposed within the second housing 12. A buffer member 27 is also disposed between the second end plate 22 and the third housing 13 to buffer the vibration of the battery module 2 within the housing 1. The buffer member 27 is made of an elastic material, preferably a rubber pad. In other embodiments, the buffer member 27 may also be a flexible material such as foam, foamed silica gel, or sponge, and the present application does not limit this. In one embodiment, the buffer member 27 is bonded to the surfaces of the first end plate 21 and the second end plate 22 away from the battery module 2. It can be understood that in other embodiments, the buffer member 27 may also be fixed to the surfaces of the first housing 11 and the second housing 12 facing the battery module 2.

[0122] Please refer to Figures 11 to 14 , the fixing member 24 includes a first fixing portion 241 and a second fixing portion 242. The first fixing portion 241 and the second fixing portion 242 are disposed on the sides of the battery module 2, and the first fixing portion 241 and the second fixing portion 242 are spaced apart. Figure 14 The direction indicated by the arrow in

[0123] Please continue to refer to Figure 15 , Figure 16 and Figure 17, the fixing member 24 is arranged on the long side of the first bracket 25, and the first fixing portion 241 and the second fixing portion 242 are arranged on the same side of the first bracket 25. Specifically, the first fixing portion 241 is arranged close to the adapter plate 3, and the second fixing portion 242 is arranged at one end of the long side of the first bracket 25 away from the adapter plate 3. The cross-section of the first fixing portion 241 is roughly "U"-shaped, and it includes a first protrusion 2411, a second protrusion 2412 and a base 2413. The first protrusion 2411 and the second protrusion 2412 are arranged opposite to each other and protrude outward from both ends of the base 2413 respectively. The first positioning portion 121 is arranged between the first protrusion 2411 and the second protrusion 2412, and cooperates with the first fixing portion 241. The side of the second protrusion 2412 facing the first protrusion 2411 is a first fixing surface 2414, and the first fixing surface 2414 supports the first positioning portion 121, that is, the first positioning portion 121 abuts against the first fixing surface 2414 to limit the movement of the battery module 2 along the first direction. In this embodiment, the first direction refers to Figure 9 The direction shown by the Z axis.

[0124] The sidewall of the second shell 12 has an inclined surface and a vertical surface. The inclined surface is close to the top surface of the second shell 12. The first fixing portion 241 and the first positioning portion 121 are approximately located at the intersection of the inclined surface and the vertical surface. The first protrusion 2411 is located above the second protrusion 2412. To ensure that the battery module 2 can be smoothly inserted into the second shell 12, the length of the first protrusion 2411 is shorter than the length of the second protrusion 2412. It is understood that in other embodiments, the length of the first protrusion 2411 can be the same as the length of the second protrusion 2412, which is determined by the actual shape of the shell 1 and is not limited in this application.

[0125] The cross section of the second fixing portion 242 is substantially rectangular. The side of the second fixing portion 242 facing away from the first fixing portion 241 is a second fixing surface 2421. The second positioning portion 122 supports or contacts the second fixing surface 2421 to limit the movement of the battery module 2 along the second direction, that is, to limit the movement of the battery module 2 in the second direction. Figure 14 The second direction is Figure 9It is opposite to the Z-axis direction. It can be understood that the second convex part 2412 of the first fixing part 241 and the second fixing part 242 are arranged between the first positioning part 121 and the second positioning part 122, so as to limit the up and down movement of the battery module 2 in the second housing 12. At the same time, since fixing members 24 are arranged on both sides of the battery module 2, positioning members corresponding to the fixing members 24 are correspondingly arranged on two symmetric inner side walls of the second housing 12, thereby effectively reducing mechanical damage caused by external vibration and impact to the battery module 2 and improving the use safety of the battery module 2.

[0126] While the fixing member 24 cooperates with the positioning member in the second housing 12 to limit the circumferential movement of the battery module 2, it can also guide the insertion direction of the battery module 2.

[0127] Please refer to again Figure 11 As shown, the lengths of the first fixing part 241 and the second fixing part 242 are the same as the side widths of a single first bracket 25, and a plurality of the first fixing parts 241 and a plurality of the second fixing parts 242 are spliced respectively as the plurality of battery cells 20 are stacked to form the fixing member 24. It can be understood that in other embodiments, the lengths of the first fixing part 241 and the second fixing part 242 can be the same as the length of the battery module 2, and a single first fixing part 241 and a single second fixing part 242 can be simultaneously connected and fixed to the sides of a plurality of first brackets 25.

[0128] Please refer to again Figure 11 and Figure 15 As shown, a protruding part 252 is further arranged on the first bracket 25, and the protruding part 252 is only arranged on one side of the first bracket 25. As described above, the battery module 2 includes a plurality of stacked battery cells 20 and first brackets 25, and the battery cells 20 are arranged in the first brackets 25. The protruding part 252 is used to prevent the first brackets 25 from being installed reversely during the stacking installation process, and is also used to prevent the installed battery module 2 from being welded reversely when welded to the adapter board 3.

[0129] Please refer to Figure 9 、 Figure 18 and Figure 19, first mounting portions 211 are provided on both sides of the first end plate 21, and second mounting portions 221 similar in structure to the first mounting portions 211 are provided on both sides of the second end plate 22. The first mounting portions 211 and the second mounting portions 221 are substantially perpendicular to the end faces of the first end plate 21 and the second end plate 22. End plate nuts 29 are provided on both the first mounting portions 211 and the second mounting portions 221, and fourth through holes 124 corresponding to the end plate nuts 29 are formed in the side wall of the second housing 12. In one embodiment, the end plate nut 29 is preferably a blind hole nut, and fasteners such as bolts and screws matching the end plate nut 29 are screwed into the fourth through hole 124 and fixedly connected to the end plate nut 29, so that the first end plate 21 and the second end plate 22 are fixedly connected to the second housing 12.

[0130] A third positioning portion 123 is further provided at the top end of the inner cavity of the second housing 12. Mounting holes are formed in the first positioning portion 121, the second positioning portion 122 and the third positioning portion 123, and another bolt corresponding to the mounting hole is provided on the first housing 11 and the third housing 13 for fixedly mounting the first housing 11 and the third housing 13 at both ends of the second housing 12.

[0131] The battery pack 100 further includes a first component 111, and the first component 111 is disposed on the surface of the first housing 11 facing away from the battery module 2. A convex column 212 is provided on the end face of the first end plate 21 facing the first housing 11, and a through hole (not labeled) is provided on the convex column 212. A third through hole 112 corresponding to the convex column 212 is formed in the first housing 11, and another bolt passes through the first component 111 and the third through hole 112 and is connected to the convex column 212, so that the first component 111, the first housing 11 and the first end plate 21 are fixedly connected together. A positioning hole 113 is further formed in the first housing 11, and positioning convex portions 114 are provided at both ends of the first component 111, and the positioning convex portions 114 are received in the positioning hole 113 to prevent the first component 111 from being displaced during installation.

[0132] The above battery pack 100 is fixed to the first bracket 25 by using the second bracket 4. Although the number of the first brackets 25 increases, corresponding first through holes 251 are provided on each first bracket 25, and the installation of the second bracket 4 is not affected by the change in the number of battery cells; and a first groove 42 is provided on the second bracket 4 to fix the wire harness 5 or other components in the first groove 42, and the utilization rate of the limited space inside the battery pack 100 is improved.

[0133] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and essence of the technical solutions of the present application.

Claims

1. A battery pack, comprising a battery module, the battery module including a wiring harness, a plurality of battery cells, and a plurality of first brackets arranged in sequence, characterized in that, Each of the battery cells is accommodated in the first bracket, and the first bracket is fixed to the peripheral side of the battery cell. The battery pack also includes a second bracket for fixing the battery management system module, and the second bracket is fixed above the first bracket and is provided with a first groove. The first groove fixes the wiring harness, and the wiring harness passes through the first groove; the first bracket has a first through hole, and the second bracket has a plurality of mounting parts, and the mounting parts have a second through hole. The battery pack also includes a bolt, and the bolt passes through the second through hole and is connected to the first through hole to fix the second bracket and the first bracket.

2. The battery pack according to claim 1, wherein: The battery pack includes an adapter plate connected to the battery cell, the first bracket is arranged on one side of the adapter plate, and the second bracket is arranged on the other side of the adapter plate.

3. The battery pack according to claim 2, wherein: The adapter plate defines a third through hole, and the bolt passes through the second through hole and the third through hole in sequence and is connected to the first through hole to fix the second bracket, the adapter plate, and the first bracket.

4. The battery pack according to claim 1, wherein: A plurality of fixing portions are arranged at intervals in the first groove.

5. The battery pack according to claim 4, characterized in that: The fixing portion includes a deformation portion provided on a side wall of the first groove, and a clamping portion provided at one end of the deformation portion.

6. The battery pack according to claim 5, characterized in that: The fixing portion includes two deformable portions provided on the side walls of the first groove, the two deformable portions are provided with clamping portions facing each other, and the fixing portions on different side walls of the first groove are symmetrically provided.

7. The battery pack according to claim 6, wherein: The holding portion of at least one of the fixing portions is farther away from the bottom wall of the first groove than the other holding portions.

8. The battery pack according to claim 1, characterized in that: One end of the first groove is wider than the other end.

9. The battery pack according to claim 1, characterized in that: The second bracket further includes a plurality of pre-embedded or hot-melt nuts.

10. The battery pack according to claim 9, wherein: The second bracket is further provided with a second groove, and the nut is received in the second groove. The bottom wall of the second groove is lower than the end surface of the nut on the side facing away from the first bracket.

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