CN116259900A

CN116259900A - Battery pack

Info

Publication number: CN116259900A
Application number: CN202310446699.3A
Authority: CN
Inventors: 张玉红; 饶焰; 佘超粤; 陈智伟; 陈朝海
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-04-23
Filing date: 2023-04-23
Publication date: 2023-06-13

Abstract

The application discloses battery package, battery module's tray includes holding cavity and sets up the lug in the peripheral outside of holding cavity in the battery package. On the same side of the tray, a plurality of lugs are arranged at intervals, and a gap is arranged between two adjacent lugs. The battery pack comprises at least one battery assembly, the battery assembly comprises two adjacent battery modules, and the lugs of one tray are positioned between the lugs of the other tray through the adjacent positions of the two adjacent battery modules so as to save the space occupied by the battery modules in the arrangement direction, so that the arrangement of the battery modules in the battery pack is tighter. In other words, in the arrangement direction, a certain length can arrange more battery modules, so that the space utilization rate of the battery pack is improved.

Description

Battery pack

Technical Field

The application relates to the technical field of batteries, in particular to a battery pack.

Background

The battery modules in the battery pack have long sides and wide sides. In order to increase the capacity of the battery pack, a plurality of battery modules needs to be arranged for use. However, the number of the battery modules arranged along the long side direction is limited, and the battery modules occupy more space in the long side direction, resulting in low space utilization of the battery pack, so that the battery modules are generally arranged along the wide side direction. More battery modules are arranged in the broadside direction of the battery modules, so that the length of the battery pack in the direction is increased, the expansion force of the battery pack is increased, and the structural strength of the battery pack is reduced. Therefore, there is a need to design a battery pack to improve the space utilization rate while ensuring the capacity. In other words, under the condition that more battery modules are arranged as much as possible, the length of the battery pack in the wide-side direction of the battery modules is saved, and the strength of the battery pack is ensured.

Disclosure of Invention

The embodiment of the application provides a battery pack, and under the premise of ensuring electric capacity, the space utilization rate is improved. Under the condition that more battery modules are arranged as much as possible, the length of the battery pack in the broadside direction of the battery modules can be saved, so that the strength of the battery pack is ensured.

Embodiments of the present application provide a battery pack including at least one battery assembly including two adjacently arranged battery modules.

The battery module comprises a tray and a battery cell arranged in the tray, wherein the tray comprises a containing cavity and lugs arranged on the outer side of the periphery of the containing cavity, the lugs are arranged on the same side of the tray at intervals, and gaps are formed between every two adjacent lugs.

And at the adjacent position of the two adjacent battery modules, the lug of one tray is positioned in the notch of the other tray.

In an embodiment, in the orthographic pattern of the tray, the pattern of lugs is symmetrically disposed about the center of the tray.

In an embodiment, the battery pack further comprises a box body, the box body comprises a bottom plate, and a cross beam and a longitudinal beam which are arranged on the bottom plate, the cross beam is arranged along a first direction, the longitudinal beam is arranged along a second direction, the first direction and the second direction are intersected, and a plurality of accommodating areas are formed by enclosing the bottom plate, the cross beam and the longitudinal beam.

The battery module is installed in the accommodation area, and the lugs are fixed to the cross beam or the longitudinal beam.

In an embodiment, the battery assembly includes a first battery module and a second battery module that are adjacently arranged, the battery assembly further includes a communication harness, a communication terminal of the first battery module is connected with the communication harness, and a communication terminal of the second battery module is connected with the communication harness.

The battery pack also comprises a battery management system, and the communication wire harness is electrically connected with the battery management system.

In one embodiment, the battery pack further comprises a fixing bracket, the fixing bracket is arranged on the cross beam, and the communication wire harness is fixed on the fixing bracket.

In an embodiment, the notch further exposes a side of the beam away from the bottom plate, and the fixing bracket is located at the notch and connected to a side of the beam away from the bottom plate.

In an embodiment, the fixed support includes the support frame that sets up on the crossbeam and sets up installation roof beam on the support frame, the support frame deviates from the one end of crossbeam is connected the installation roof beam, the installation roof beam is followed the first direction sets up, the communication pencil is fixed in on the installation roof beam.

In one embodiment, the mounting beam is provided with a first mounting hole, and a first fixing strap passes through the first mounting hole to fix the communication harness.

In an embodiment, the battery pack further includes a connection bracket, one end of the connection bracket is connected with the first battery module, and the other end of the connection bracket is connected with the second battery module.

In one embodiment, the tray includes a boss disposed on the lug, and the connection bracket is disposed on the boss.

One of the bosses of the battery module is fixedly connected with one end of the connecting support, and the other boss of the battery module is fixedly connected with the other end of the connecting support.

In an embodiment, the connecting bracket is located at a connection position of the longitudinal beam and the transverse beam, and the communication wire harness is arranged along the first direction and is sequentially fixed on the connecting bracket and the fixing bracket.

In an embodiment, the connecting bracket comprises an upper plate, a lower plate and a side plate, one end of the upper plate is abutted to one end of the side plate, the other end of the side plate is abutted to one end of the lower plate, a second mounting hole is formed in the upper plate, and a second fixing strap penetrates through the second mounting hole to fix the communication wire harness.

In an embodiment, the battery pack includes a first battery assembly and a second battery assembly arranged along a first direction, the first battery assembly includes a first battery module and a second battery module arranged along a second direction, the second battery assembly includes a third battery module and a fourth battery module arranged along the second direction, the first direction crosses the second direction, the first battery module is adjacent to the third battery module, and electrode terminals of the first battery module are opposite in polarity to electrode terminals of the third battery module at an adjacent place of the first battery module and the third battery module.

The battery pack further comprises a first connection row, one end of the first connection row is connected with the electrode terminal of the first battery module, and the other end of the first connection row is connected with the electrode terminal of the third battery module.

In an embodiment, the battery pack further includes a third battery assembly and a second connection row, the first battery assembly and the third battery assembly are arranged along the second direction, the third battery assembly includes a fifth battery module and a sixth battery module, the fifth battery module is adjacent to the second battery module, polarities of electrode terminals on the same side of the second battery module and the fifth battery module are opposite, one end of the second connection row is connected with the electrode terminal of the second battery module, and the other end of the second connection row is connected with the electrode terminal of the fifth battery module.

In an embodiment, the battery pack further includes a fourth battery assembly, the second battery assembly and the fourth battery assembly are arranged along the second direction, the third battery assembly and the fourth battery assembly are arranged along the first direction, and the fourth battery assembly includes a seventh battery module and an eighth battery module.

The positive electrode terminal of the first battery module is electrically connected with the negative electrode terminal of the third battery module, the positive electrode terminal of the third battery module is electrically connected with the negative electrode terminal of the fourth battery module, the positive electrode terminal of the fourth battery module is electrically connected with the negative electrode terminal of the seventh battery module, the positive electrode terminal of the seventh battery module is electrically connected with the negative electrode terminal of the eighth battery module, the positive electrode terminal of the eighth battery module is electrically connected with the negative electrode terminal of the sixth battery module, the positive electrode terminal of the sixth battery module is electrically connected with the negative electrode terminal of the fifth battery module, and the positive electrode terminal of the fifth battery module is electrically connected with the negative electrode terminal of the second battery module.

The battery pack further comprises a battery cutting unit, the battery cutting unit is arranged corresponding to the first battery assembly, the battery cutting unit is provided with a positive electrode connector and a negative electrode connector, the positive electrode connector is connected with a positive electrode terminal of the second battery module, and the negative electrode connector is connected with a negative electrode terminal of the first battery module.

The beneficial effects of this application:

the tray of battery module in the battery package of this application includes holding cavity and sets up the lug in the peripheral outside of holding cavity. On the same side of the tray, a plurality of lugs are arranged at intervals, and a gap is arranged between two adjacent lugs. The battery pack comprises at least one battery assembly, the battery assembly comprises two adjacent battery modules, and the lugs of one tray are positioned between the lugs of the other tray through the adjacent positions of the two adjacent battery modules so as to save the space occupied by the battery modules in the arrangement direction, so that the arrangement of the battery modules in the battery pack is tighter. In other words, in the arrangement direction, a certain length can arrange more battery modules, so that the space utilization rate of the battery pack is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a battery pack according to an embodiment of the present application;

fig. 2 is a schematic perspective view of a battery pack according to an embodiment of the present disclosure;

fig. 3 is a schematic top view of a tray of a battery pack according to an embodiment of the present disclosure;

fig. 4 is a schematic top view of a case and a tray of the battery pack according to the embodiment of the present application;

fig. 5 is a schematic perspective view of a box, a tray, a fixing bracket, a connection bracket and a communication harness of the battery pack according to the embodiment of the present application;

FIG. 6 is an enlarged partial schematic view of the connecting bracket of FIG. 5;

fig. 7 is a schematic top view of a battery assembly, a first connection row, a second connection row, and a battery cutoff unit of the battery pack according to the embodiment of the present application.

Reference numerals: a battery pack 100; a battery assembly C; a first battery assembly C1; a second battery assembly C2; a third battery assembly C3; a fourth battery assembly C4; a communication harness S; a battery management system BMS; a battery shut-off unit BDU; a positive electrode tab T1; a negative electrode tab T2; a battery module 10; a first battery module 10A; a second battery module 10B; a third battery module 10C; a fourth battery module 10D; a fifth battery module 10E; a sixth battery module 10F; a seventh battery module 10G; an eighth battery module 10H; a tray 11; a housing chamber 111; lugs 112; a notch 113; a boss 114; a cell 12; a case 20; a bottom plate 21; a cross beam 22; a stringer 23; a housing area U; a fixing bracket 30; a support frame 31; a mounting beam 32; a first mounting hole K1; a second mounting hole K2; a connection bracket 40; an upper plate 41; a lower plate 42; a side plate 43; a first connection row 51; a second connection row 52; a first direction X; a second direction Y.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application. In this application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.

Referring to fig. 1 to 3, a battery pack 100 is provided in an embodiment of the present application, wherein the battery pack 100 includes at least one battery module C, and the battery module C includes two adjacent battery modules 10. The battery module 10 includes a tray 11 and a battery cell 12 disposed in the tray 11. The tray 11 includes a receiving cavity 111 and lugs 112 disposed outside the periphery of the receiving cavity 111. On the same side of the tray 11, a plurality of lugs 112 are arranged at intervals, and a gap 113 is arranged between two adjacent lugs 112. At the abutment of the adjacent two battery modules 10, the lugs 112 of one tray 11 are positioned in the notches 113 of the other tray 11. That is, the lugs 112 of one tray 11 and the lugs 112 of the other tray 11 are staggered at the abutment of the adjacent two battery modules 10.

The battery pack 100 of the present application can make the arrangement of the battery modules 10 in the battery pack 100 more compact by arranging the lugs 112 of one tray 11 between the lugs 112 of the other tray 11 at the adjacent positions of the two adjacent battery modules 10 to save the space occupied by the battery modules 10 in the arrangement direction. In other words, a certain length can arrange more battery modules 10 in the arrangement direction, improving the space utilization of the battery pack 100.

The plurality of battery modules 10 are arranged along the width direction of the battery modules 10, and the adjacent portions between the battery modules 10 are provided with the lugs 112 in a staggered manner, so that the width direction can be shortened. Along the long side direction of the battery modules 10, a plurality of battery modules 10 are arranged, and the adjacent parts between the battery modules 10 are provided with lugs 112 in a staggered manner, so that the long side direction can be shortened. The two battery modules 10 in the battery assembly C are arranged in the broadside direction, and the lugs 112 are disposed at adjacent positions of the two battery modules 10 in a staggered manner. When the two battery modules C are arranged in the broadside direction, the lugs 112 are staggered at adjacent positions of the two battery modules C. That is, the battery assembly C includes two adjacent battery modules 10, and the lugs 112 at the adjacent positions are alternately arranged, and when the two battery assemblies C are adjacent, the lugs 112 of the two adjacent battery modules 10 may be alternately arranged. The same applies to the arrangement along the longitudinal direction.

In the embodiment of the application, the long side direction of the battery module is a first direction X, the wide side direction of the battery module is a second direction Y, and the first direction X and the second direction Y intersect perpendicularly. The ratio of the long sides to the wide sides of the battery modules 10 is greater than 1 and less than or equal to 2.5, so that the lugs 112 of the adjacent two trays 11 are staggered in the wide side direction to shorten the occupied space, and more battery modules 10 can be arranged. In the long side direction, two lugs 112 are respectively arranged at two ends of each tray 11, and the lugs 112 of two adjacent trays 11 are not staggered. However, in order to shorten the longitudinal direction, the lugs 112 of two adjacent trays 11 in the longitudinal direction may be alternately arranged, which is not limited in this application. Alternatively, the ratio of the long side to the wide side of the battery module 10 is 1.25, 1.5, 1.75, 1.8, 2.0, 2.1, 2.25, 2.5, or the like.

Alternatively, the number of lugs 112 on a broad side of the tray 11 is 1, 2, 3, 4 or 5. In the present embodiment, the number of lugs 112 on one broad side of the tray 11 is 1. Alternatively, the number of lugs 112 on one long side of the tray 11 is 1, 2, 3, 4 or 5. In the embodiment of the present application, the number of lugs 112 on one long side of the tray 11 is 4, and 4 lugs 112 are spaced apart. The specific number of lugs 112 may also be set as desired.

Alternatively, in the orthographic pattern of a tray 11, the pattern of lugs 112 is symmetrically disposed about the center of the tray 11. It will be appreciated that one tray 11 may be aligned with another tray 11 after being rotated 180 degrees, and the lugs 112 of the two trays 11 may be staggered without interference. Thus, only one structure of tray 11 needs to be manufactured when manufacturing the tray 11, which is beneficial to saving the process.

Referring to fig. 4, in the embodiment of the present application, the battery pack 100 further includes a case 20. The case 20 includes a floor 21, and a cross member 22 and a side member 23 provided on the floor 21. Wherein the cross members 22 are arranged in a first direction X and the stringers 23 are arranged in a second direction Y, the first direction X intersecting the second direction Y. The floor 21, cross members 22 and stringers 23 enclose a plurality of receiving areas U. The battery module 10 is mounted in the receiving region U. The lugs 112 are used to secure with the housing 20 of the battery pack 100. Lugs 112 connect tray 11 to case 20 by being secured to cross member 22 or longitudinal member 23.

It will be appreciated that the lugs 112 of the tray 11 are provided on the cross members 22 or the longitudinal members 23 to effect the fixing of the tray 11 carrying the battery modules 10 to the case 20. The lugs 112 of two adjacent trays 11 are staggered, so that the space occupied by the arrangement of the battery modules 10 can be saved, and the fixing of the lugs 112 of the trays 11 and the cross beam 22 or the longitudinal beam 23 can be prevented.

Referring again to fig. 1, in the embodiment of the present application, the battery assembly C includes a first battery module 10A and a second battery module 10B that are adjacently arranged. The battery assembly C further includes a communication harness S. The communication terminal of the first battery module 10A is connected with the communication harness S, and the communication terminal of the second battery module 10B is connected with the communication harness S. The battery pack 100 further includes a battery management system (Battery Management System, BMS) BMS to which the communication harness S is electrically connected.

It can be appreciated that two battery modules 10 arranged adjacently are connected to the battery management system BMS through a communication harness S, so as to avoid confusion caused by too many harnesses.

Specifically, the battery assembly C includes a first battery module 10A and a second battery module 10B arranged along the second direction Y, the communication terminal of the first battery module 10A is disposed at one end of the battery assembly C along the first direction X, and the communication terminal of the second battery module 10B is disposed at the other end of the battery assembly C along the first direction X. It is understood that the arrangement of the tray 11, the battery cells 12, the communication terminals, etc. of the first battery module 10A and the second battery module 10B is identical before the first battery module 10A and the second battery module 10B are arranged to constitute the battery assembly C. The process can be saved when the battery module 10 is produced and assembled, and the risk of misloading of the wire harness is avoided. After the first battery module 10A and the second battery module 10B are arranged to form the battery assembly C, the communication terminal of the first battery module 10A and the communication terminal of the second battery module 10B are arranged at opposite sides, the communication harness S is routed between the first battery module 10A and the second battery module 10B, and the communication terminals of the first battery module 10A and the second battery module 10B can be connected to the battery management system BMS, so that disorder of routing is avoided.

Referring to fig. 5, in the embodiment of the present application, the battery pack 100 further includes a fixing bracket 30, and the fixing bracket 30 is used for fixing the communication harness S. The communication harness S is disposed along the cross beam 22, the fixing bracket 30 is disposed on the cross beam 22, and the communication harness S is fixed on the fixing bracket 30. It will be appreciated that securing the communication harness S may avoid harness clutter.

Alternatively, the fixing bracket 30 may be directly fixed to the cross member 22 or may be fixed to the tray 11.

In the present embodiment, the notch 113 between the lugs 112 of the tray 11 may not only place the lug 112 of another tray 11, but also accommodate the fixing bracket 30. The notches 113 between the lugs 112 provided on the cross beam 22 expose the side of the cross beam 22 facing away from the base plate 21, and the fixing bracket 30 is located at the notches 113 and is connected to the side of the cross beam 22 facing away from the base plate 21. In the present embodiment, the fixing bracket 30 is directly fixed to the cross member 22, so that damage to the tray 11 of the battery module 10 due to installation can be prevented.

Optionally, at the adjacent position of the first battery module 10A and the second battery module 10B where the communication harness S is routed, the tray 11 of the first battery module 10A and/or the second battery module 10B is provided with a shorter lug 112, so that the length of the notch 113 is longer, so as to accommodate the lug 112 and the fixing bracket 30 of the adjacent tray 11.

Referring to fig. 3 again, in the embodiment of the present application, 2 short lugs 112, 1 long lug 112 and 1 short lug 112 are sequentially arranged on one long side of the tray 11 at intervals, and 1 short lug 112, 2 long lugs 112 and 1 short lug 112 are sequentially arranged on the other long side of the tray 11 at intervals. In the battery pack C, the long side split having 3 short lugs 112 in total may form 3 notches 113, which may accommodate 3 fixing brackets 30.

In the present embodiment, in the orthographic projection pattern of two adjacent split trays 11 in the battery assembly C, the pattern of the lugs 112 is disposed symmetrically with respect to the center of the pattern of the two trays 11. That is, the patterns of the two split trays 11 in the battery pack C are identical to the patterns of the two split trays 11 rotated 180 degrees. In other words, the front projection pattern of one tray 11 in the battery assembly C is rotated 180 degrees and is identical to the front projection pattern of the other tray 11 in the battery assembly C. It will be appreciated that the same construction of tray 11 facilitates process savings in manufacturing.

It will be appreciated that the communication harness S requires a certain amount of space to be fixed. However, the adjacent two battery modules 10 are not enough to fix the communication harness S due to the closely staggered arrangement of the lugs 112, and thus the fixing brackets 30 are required to be disposed above the cross members 22 and the lugs 112 to mount the communication harness S. At the same time, the provision of the fixing brackets 30 at the gaps 113 between the lugs 112 prevents damage to the tray 11.

Specifically, the fixing bracket 30 may be a supporting bracket 31. The supporting frames 31 are disposed in the notches 113, and the communication harness S is directly fixed on the supporting frames 31. The fixing bracket 30 may further include a support bracket 31 and a mounting beam 32 provided on the support bracket 31.

In the present embodiment, the fixing bracket 30 includes a support frame 31 and a mounting beam 32 provided on the support frame 31. The support frame 31 is used as a support leg and is fixedly connected with the surface of the cross beam 22 through the notch 113, and one end of the support frame 31, which is away from the cross beam 22, is connected with the mounting beam 32. The mounting beams 32 are arranged along the cross beam 22, i.e. along the first direction X. The communication harness S is fixed to the mounting beam 32.

Alternatively, the supporting frame 31 and the mounting beam 32 may be integrally provided, or may be separately provided. In the present embodiment, the support frame 31 and the mounting beam 32 are separately provided, and the mounting beam 32 is connected to the support frame 31 by a connecting member such as a bolt.

It should be noted that, in order to meet the process specification, the fixed distance between the communication wires S is preferably 150 mm to 180 mm. The fixing bracket 30 includes the mounting beam 32 disposed along the first direction X, and can fix the communication harness S at a plurality of positions on the mounting beam 32 without being restricted by the arrangement of the lugs 112 of the tray 11 and without damaging the structure of the tray 11.

In the embodiment of the present application, a plurality of first mounting holes K1 are formed in the mounting beam 32, and the first fixing strap passes through the first mounting holes K1 to fix the communication harness S. In this embodiment, the first mounting hole K1 is formed in the side of the mounting beam 32 away from the base plate 21, so that the communication harness S can be fixed to the mounting beam 32, and the problem of insufficient mounting hole positions is solved.

Alternatively, the number of the first mounting holes K1 on the mounting beam 32 may be 4, 5 or 6, and may be specifically set according to actual needs. In the present embodiment, the number of the first mounting holes K1 in the mounting beam 32 is 4. The first securing strap may be a tie strap.

It is understood that the communication harness S is fixed by way of the first fixing strap passing through the first mounting hole K.

Referring to fig. 6, in the embodiment of the present application, the battery pack 100 further includes a connection bracket 40, one end of the connection bracket 40 is connected to the first battery module 10A, and the other end of the connection bracket 40 is connected to the second battery module 10B.

It can be appreciated that the connection bracket 40 connects and fixes two adjacent battery modules 10, further reinforcing the connection of the battery modules 10.

Specifically, the tray 11 includes a boss 114 provided on the lug 112, and the protruding direction of the boss 114 is perpendicular to the plane in which the first direction X and the second direction Y lie. The connection bracket 40 is disposed on the boss 114. The boss 114 of one battery module 10 is fixedly connected with one end of the connection bracket 40, and the boss 114 of the other battery module 10 is fixedly connected with the other end of the connection bracket 40.

Alternatively, the connection bracket 40 may be fixedly coupled to the boss 114 by a connection member such as a bolt.

The trays 11 of the adjacent two battery modules 10 are fixedly connected by the connection brackets 40, so that the structural strength of the battery pack 100 can be improved.

In the embodiment of the present application, the connection bracket 40 is located at the connection between the longitudinal beam 23 and the transverse beam 22, and the communication harness S is disposed along the first direction X and is sequentially fixed to the connection bracket 40 and the fixing bracket 30.

Since the cross member 22 and the side member 23 define the receiving region U, the connection between the adjacent two battery modules 10 is located at the connection point of the connection bracket 40, so that the connection bracket 40 connects the adjacent two battery modules 10 to strengthen the stability. And the connecting bracket 40 at the connection position and the fixing bracket 30 arranged on the cross beam 22 are sequentially arranged along the first direction X, so that the communication harness S arranged along the first direction X can be sequentially fixed on the connecting bracket 40 and the fixing bracket 30, so that the communication harness S has more fixing positions and is more stable.

In this embodiment, the connection bracket 40 includes an upper plate 41, a lower plate 42 and a side plate 43, one end of the upper plate 41 is abutted to one end of the side plate 43, the other end of the side plate 43 is abutted to one end of the lower plate 42, the upper plate 41 is provided with a second mounting hole K2, and a second fixing strap passes through the second mounting hole K2 to fix the communication harness S.

It is understood that the lower plate 42 of the connection bracket 40 is adjacent to the tray 11 of the battery modules 10, one end of the lower plate 42 in the arrangement direction of the battery modules 10 is connected to the first battery module 10A, and the other end in the arrangement direction of the battery modules 10 is connected to the second battery module 10B. That is, the lower plate 42 serves as a plate body connecting the first battery module 10A and the second battery module 10B as the connecting bracket 40.

And the upper plate 41 is disposed on a side of the lower plate 42 away from the bottom plate 21, and is connected and fixed to the lower plate 42 by a side plate 43. Specifically, the second mounting hole K2 is formed in the surface of the upper plate 41 away from the bottom plate 21, so that the battery assembly C has more mounting holes, and the communication harness S can be fixed.

Alternatively, the second fixing strap may be a tie strap, and the second fixing strap passes through the second mounting hole K2 to fix the communication harness S.

Referring to fig. 7, in the embodiment of the present application, a battery pack 100 includes a first battery assembly C1 and a second battery assembly C2 arranged along a first direction X. The first battery assembly C1 includes a first battery module 10A and a second battery module 10B aligned in the second direction Y. The second battery assembly C2 includes a third battery module 10C and a fourth battery module 10D aligned in the second direction Y. The first direction X intersects the second direction Y. The first battery module 10A is adjacent to the third battery module 10C. At the abutment of the first battery module 10A and the third battery module 10C, the electrode terminals of the first battery module 10A and the electrode terminals of the third battery module 10C are opposite in polarity. The battery pack 100 further includes a first connection row 51, one end of the first connection row 51 is connected to the electrode terminal of the first battery module 10A, and the other end of the first connection row 51 is connected to the electrode terminal of the third battery module 10C.

It can be appreciated that by arranging the electrode terminals at the adjacent positions of the first battery component C1 and the second battery component C2 in opposite polarity, the electrode terminals of the first battery component C1 can be directly connected with the electrode terminals of the adjacent second battery component C2 through the first connection row 51, so that the circuit contact failure and even disconnection caused by overlong first connection row 51, less rigidity and easy damage are avoided. In addition, the first connection row 51 is too long, and the first connection row 51 needs to be fixed, so that the risk of falling off due to failure of fixation may occur.

Alternatively, the first connection line 51 is made of metallic copper (Cu), which is excellent in conductive property.

In the embodiment of the present application, the battery pack 100 further includes a third battery assembly C3 and a second connection row 52. The first and third battery packs C1 and C3 are arranged in the second direction Y. The third battery assembly C3 includes a fifth battery module 10E and a sixth battery module 10F. The fifth battery module 10E is adjacent to the second battery module 10B. The electrode terminals on the same side of the second battery module 10B and the fifth battery module 10E are opposite in polarity. One end of the second connection row 52 is connected to the electrode terminal of the second battery module 10B, and the other end of the second connection row 52 is connected to the electrode terminal of the fifth battery module 10E.

In the embodiment of the present application, the side plates 43 of the connection bracket 40 may be additionally provided with insulating fixtures to fixedly connect the connection rows between the electrode terminals of the battery module 10.

Optionally, the battery pack 100 further comprises a liquid-cooled tube. The liquid cooling pipe is disposed between the first cell assembly C1 and the third cell assembly C3. In the embodiment of the present application, at the adjacent position of the first battery assembly C1 and the third battery assembly C3, a pipe fixing frame is further provided for fixing the liquid cooling pipe.

It should be noted that, adjacent two battery modules C arranged in the second direction Y are connected by the second connection row 52. In the second direction Y, the fifth battery module 10E and the second battery module 10B are adjacent, and the polarities of the electrode terminals on the same side of the two battery modules 10 are opposite, the second connection row 52 may connect two electrode terminals of the second battery module 10B and the fifth battery module 10E that are close to each other, so that the second connection row 52 is prevented from being excessively long to connect the battery packs C arranged in the second direction Y.

It is also understood that electrode terminals of opposite polarities may be connected between adjacent two battery packs C arranged in the first direction X through the first connection row 51. Electrode terminals of opposite polarities on the same side may be connected between adjacent two battery packs C arranged in the second direction Y through the second connection rows 52.

In the embodiment of the present application, the battery pack 100 further includes a fourth battery assembly C4. The second cell assembly C2 and the fourth cell assembly C4 are arranged in the second direction Y. The third and fourth battery packs C3 and C4 are arranged in the first direction X. The fourth battery assembly C4 includes a seventh battery module 10G and an eighth battery module 10H.

The positive terminal of the first battery module 10A is electrically connected to the negative terminal of the third battery module 10C. The positive terminal of the third battery module 10C is electrically connected to the negative terminal of the fourth battery module 10D. The positive terminal of the fourth battery module 10D is electrically connected to the negative terminal of the seventh battery module 10G. The positive terminal of the seventh battery module 10G is electrically connected to the negative terminal of the eighth battery module 10H. The positive terminal of the eighth battery module 10H is electrically connected to the negative terminal of the sixth battery module 10F. The positive terminal of the sixth battery module 10F is electrically connected to the negative terminal of the fifth battery module 10E. The positive terminal of the fifth battery module 10E is electrically connected to the negative terminal of the second battery module 10B.

The battery pack 100 further includes a battery shut-off unit (Battery Disconnect Unit, BDU) BDU provided corresponding to the first battery pack C1. The battery shut-off unit BDU has a positive electrode tab T1 and a negative electrode tab T2, the positive electrode tab T1 being connected to the positive electrode terminal of the second battery module 10B, and the negative electrode tab T2 being connected to the negative electrode terminal of the first battery module 10A.

The battery pack 100 of the present application is provided with 8 battery modules 10, and the electric capacity of the battery pack 100 can be greatly increased. Alternatively, the battery pack 100 may be provided with 2, 4, 8 or 16 battery modules 10, which is not limited in this application.

It can be understood that the 8 battery modules 10 in the battery pack 100 are connected to form a circuit, and the total output is performed at the first battery assembly C1. On the one hand, the long connection rows of the connection between the battery modules 10 can be avoided; on the other hand, by providing the battery shut-off unit BDU corresponding to the first battery assembly C1, the distance between the total output positive electrode and the battery shut-off unit BDU positive electrode joint T1 and the distance between the total output negative electrode and the battery shut-off unit BDU negative electrode joint T2 can be shortened. In this way, the overlong output row connecting the total output anode and the anode connector T1 can be avoided, and the overlong output row connecting the total output cathode and the cathode connector T2 can be avoided.

Alternatively, the output bar is a copper bar, and is made of metallic copper (Cu).

Alternatively, the battery shut-off unit BDU is disposed at a side of the battery module 10 remote from the bottom plate 21. Specifically, a battery cutter is arranged by arranging a placement frame

And breaking the unit BDU. Likewise, the battery management system BMS may also be provided on the rack. The rack is fixedly connected with the bottom plate 21.

The embodiment of the application provides a battery pack, which comprises at least one battery assembly, wherein the battery assembly comprises two adjacently arranged battery modules. The battery module comprises a tray and an electric core arranged in the tray. The tray comprises a containing cavity and lugs arranged on the outer side of the periphery of the containing cavity. On the same side of the tray, a plurality of lugs are arranged at intervals, and a gap is arranged between two adjacent lugs. At the adjacent place of two adjacent battery modules, the lug of one tray is positioned in the notch of the other tray. That is, the lugs of one tray and the lugs of the other tray are staggered at the abutment of the adjacent two battery modules.

According to the battery pack, the adjacent two battery modules are adjacent, the lug of one tray is located between the lugs of the other tray, so that the space occupied by the battery modules in the arrangement direction is saved, and the battery modules in the battery pack can be arranged more tightly. In other words, in the arrangement direction, a certain length can arrange more battery modules, so that the space utilization rate of the battery pack is improved.

The foregoing has outlined rather broadly the more detailed description of embodiments of the present application, wherein specific examples are provided herein to illustrate the principles and embodiments of the present application, the above examples being provided solely to assist in the understanding of the methods of the present application and the core ideas thereof; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.

Claims

1. A battery pack, characterized in that the battery pack (100) comprises at least one battery assembly (C), the battery assembly (C) comprising two adjacently arranged battery modules (10);

the battery module (10) comprises a tray (11) and a battery cell (12) arranged in the tray (11), the tray (11) comprises a containing cavity (111) and lugs (112) arranged on the outer side of the periphery of the containing cavity (111), a plurality of lugs (112) are arranged at intervals on the same side of the tray (11), and gaps (113) are formed between two adjacent lugs (112);

at the adjacent place of two adjacent battery modules (10), the lug (112) of one tray (10) is positioned in the notch (113) of the other tray (10).

2. The battery pack according to claim 1, wherein in the battery assembly (C), the orthographic projection pattern of one tray (11) is the same as the orthographic projection pattern of the other tray (11) after rotating 180 degrees.

3. The battery pack according to claim 1, wherein the battery pack (100) further comprises a case (20), the case (20) comprising a bottom plate (21) and a cross member (22) and a side member (23) provided on the bottom plate (21), the cross member (22) being provided along a first direction (X), the side member (23) being provided along a second direction (Y), the first direction (X) and the second direction (Y) intersecting, the bottom plate (21), the cross member (22) and the side member (23) enclosing to form a plurality of accommodation areas (U);

the battery module (10) is mounted in the accommodating area (U), and the lug (112) is fixed to the cross beam (22) or the longitudinal beam (23).

4. A battery pack according to claim 3, wherein the battery assembly (C) includes a first battery module (10A) and a second battery module (10B) arranged adjacently, the battery assembly (C) further includes a communication harness (S), a communication terminal of the first battery module (10A) is connected to the communication harness (S), and a communication terminal of the second battery module (10B) is connected to the communication harness (S);

the battery pack (100) further includes a Battery Management System (BMS), and the communication harness (S) is electrically connected with the Battery Management System (BMS).

5. The battery pack according to claim 4, wherein the battery pack (100) further comprises a fixing bracket (30), the fixing bracket (30) is provided on the cross member (12), and the communication harness (S) is fixed to the fixing bracket (30).

6. The battery pack according to claim 5, wherein the notch (113) further exposes a side of the beam (12) away from the bottom plate (21), and the fixing bracket (30) is located at the notch (113) and is connected to a side of the beam (12) away from the bottom plate (21).

7. The battery pack according to claim 5, wherein the fixing bracket (30) comprises a support frame (31) arranged on the cross beam (12) and a mounting beam (32) arranged on the support frame (31), one end of the support frame (31) facing away from the cross beam (12) is connected with the mounting beam (32), the mounting beam (32) is arranged along the first direction (X), and the communication harness (S) is fixed on the mounting beam (32).

8. The battery pack according to claim 7, wherein the mounting beam (32) is provided with a first mounting hole (K1), and a first fixing strap passes through the first mounting hole (K1) to fix the communication harness (S).

9. The battery pack according to claim 5, wherein the battery pack (100) further comprises a connection bracket (40), one end of the connection bracket (40) is connected to the first battery module (10A), and the other end of the connection bracket (40) is connected to the second battery module (10B).

10. The battery pack according to claim 9, wherein the tray (11) includes a boss (114) provided on the lug, the connection bracket (40) being provided on the boss (114);

one boss (114) of the battery module (10) is fixedly connected with one end of the connecting support (40), and the other boss (114) of the battery module (10) is fixedly connected with the other end of the connecting support (40).

11. The battery pack according to claim 9, wherein the connection bracket (40) is located at a junction of the longitudinal beam (23) and the transverse beam (22), and the communication harness (S) is disposed along the first direction (X) and is sequentially fixed to the connection bracket (40) and the fixing bracket (30).

12. The battery pack according to claim 11, wherein the connection bracket (40) includes an upper plate (41), a lower plate (42) and a side plate (43), one end of the upper plate (41) is abutted to one end of the side plate (43), the other end of the side plate (43) is abutted to one end of the lower plate (42), a second mounting hole (K2) is provided in the upper plate (41), and a second fixing strap passes through the second mounting hole (K2) to fix the communication harness (S).

13. The battery pack according to any one of claims 1 to 12, wherein the battery pack (100) includes a first battery module (C1) and a second battery module (C2) arranged in a first direction (X), the first battery module (C1) includes a first battery module (10A) and a second battery module (10B) arranged in a second direction (Y), the second battery module (C2) includes a third battery module (10C) and a fourth battery module (10D) arranged in the second direction (Y), the first direction (X) intersects the second direction (Y), the first battery module (10A) is adjacent to the third battery module (10C), and an electrode terminal of the first battery module (10A) is opposite in polarity to an electrode terminal of the third battery module (10C) at an abutment of the first battery module (10A) and the third battery module (10C);

the battery pack (100) further comprises a first connection row (51), one end of the first connection row (51) is connected with the electrode terminal of the first battery module (10A), and the other end of the first connection row (51) is connected with the electrode terminal of the third battery module (10C).

14. The battery pack according to claim 13, wherein the battery pack (100) further comprises a third battery assembly (C3) and a second connection row (52), the first battery assembly (C1) and the third battery assembly (C3) are arranged along the second direction, the third battery assembly (C3) comprises a fifth battery module (10E) and a sixth battery module (10F), the fifth battery module (10E) and the second battery module (10B) are adjacent, electrode terminals on the same side of the second battery module (10B) and the fifth battery module (10E) are opposite in polarity, one end of the second connection row (52) is connected with an electrode terminal of the second battery module (10B), and the other end of the second connection row (52) is connected with an electrode terminal of the fifth battery module (10E).

15. The battery pack according to claim 14, wherein the battery pack (100) further comprises a fourth battery assembly (C4), the second battery assembly (C2) and the fourth battery assembly (C4) being arranged along the second direction (Y), the third battery assembly (C3) and the fourth battery assembly (C4) being arranged along the first direction (X), the fourth battery assembly (C4) comprising a seventh battery module (10G) and an eighth battery module (10H);

the positive electrode terminal of the first battery module (10A) is electrically connected to the negative electrode terminal of the third battery module (10C), the positive electrode terminal of the third battery module (10C) is electrically connected to the negative electrode terminal of the fourth battery module (10D), the positive electrode terminal of the fourth battery module (10D) is electrically connected to the negative electrode terminal of the seventh battery module (10G), the positive electrode terminal of the seventh battery module (10G) is electrically connected to the negative electrode terminal of the eighth battery module (10H), the positive electrode terminal of the eighth battery module (10H) is electrically connected to the negative electrode terminal of the sixth battery module (10F), the positive electrode terminal of the sixth battery module (10F) is electrically connected to the negative electrode terminal of the fifth battery module (10E), and the positive electrode terminal of the fifth battery module (10E) is electrically connected to the negative electrode terminal of the second battery module (10B);

the battery pack (100) further comprises a battery cutting unit (BDU), the battery cutting unit (BDU) corresponds to the first battery component (C) and is provided with a positive electrode connector (T1) and a negative electrode connector (T2), the positive electrode connector (T1) is connected with a positive electrode terminal of the second battery module (10B), and the negative electrode connector (T2) is connected with a negative electrode terminal of the first battery module (10A).