CN219892355U

CN219892355U - Battery pack

Info

Publication number: CN219892355U
Application number: CN202320695473.2U
Authority: CN
Inventors: 陈永; 葛有为; 许可
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-10-24
Anticipated expiration: 2033-03-31

Abstract

The utility model discloses a battery pack, comprising: the battery module comprises a plurality of battery modules, a first connecting copper bar, a first bus copper bar and a second bus copper bar, wherein the battery modules are distributed along a first direction, the battery modules are provided with first output terminals and second output terminals, the first connecting copper bar is connected with two adjacent battery modules, the battery energy distribution unit is arranged on one side of the battery module along the first direction, one end of the first bus copper bar is connected with the first output terminal closest to the battery energy distribution unit, one end of the second bus copper bar is connected with the second output terminal furthest from the battery energy distribution unit, the other end of the first bus copper bar and the other end of the second bus copper bar are connected with the battery energy distribution unit, the second bus copper bar comprises a plurality of sub-bus copper bars distributed along the first direction, and the two adjacent sub-bus copper bars are lapped. According to the battery pack provided by the embodiment of the utility model, the structural strength of the second bus bar copper bar can be improved.

Description

Battery pack

Technical Field

The utility model relates to the field of batteries, in particular to a battery pack.

Background

In the related art, the battery energy distribution units of the battery pack are generally arranged on the same side in the arrangement direction of the plurality of battery modules, copper bars connected between the battery modules furthest from the battery energy distribution units and the battery energy distribution units are large in length, and longer copper bars are easy to break due to poor rigidity and structural strength. Accordingly, improvements are needed.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a battery pack, in which one end of a second bus bar is connected to a second output terminal of a battery module farthest from a battery energy distribution unit and the other end is connected to the battery energy distribution unit, and by providing the second bus bar as a plurality of sub-bus bars and providing adjacent two sub-bus bars as lap joints, the rigidity and structural strength of the second bus bar can be improved, thereby being beneficial to solving the problem that the second bus bar is easily broken.

According to an embodiment of the present utility model, a battery pack includes: the battery assembly comprises a plurality of battery modules, a first connecting copper bar, a first bus copper bar and a second bus copper bar, wherein the battery modules are distributed along a first direction, each battery module is provided with a first output terminal and a second output terminal, one of the first output terminal and the second output terminal is an anode, the other is a cathode, and the first connecting copper bar is connected with the first output terminal of one of two adjacent battery modules and the second output terminal of the other; a battery energy distribution unit provided at one side of the battery assembly in the first direction; one end of the first bus bar is connected with the first output terminal of the battery module closest to the battery energy distribution unit, and the other end of the first bus bar is connected with the battery energy distribution unit; one end of the second bus bar is connected with the second output terminal of the battery module farthest from the battery energy distribution unit, the other end of the second bus bar is connected with the battery energy distribution unit, the second bus bar comprises a plurality of sub bus bars distributed along the first direction, the sub bus bars are respectively and independently formed, and two adjacent sub bus bars are lapped.

According to the battery pack disclosed by the utility model, one end of the second bus bar is connected with the second output terminal of the battery module furthest from the battery energy distribution unit, and the other end of the second bus bar is connected with the battery energy distribution unit, and the second bus bar is arranged into a plurality of sub bus bars, so that the adjacent two sub bus bars are arranged to be in lap joint, the rigidity and the structural strength of the second bus bar can be improved, and the problem that the second bus bar is easy to break can be solved.

According to some embodiments of the utility model, the sub-bus copper bars include a first main body portion, a lap joint portion, and an extension portion connected between the first main body portion and the lap joint portion, the first main body portion extends along the first direction, the extension portion and the first main body portion have an included angle therebetween and extend in a direction away from the battery module, the lap joint portion extends along the first direction, the lap joint portions of two adjacent sub-bus copper bars are overlapped and connected, and the lap joint portions of two adjacent sub-bus copper bars are connected or welded by a first fastener.

According to some alternative embodiments of the utility model, the battery assembly further comprises: the first protection piece is an insulating piece, the first protection piece is covered outside the lap joint part, and the outer surfaces of the extending part and the first main body part are covered with a first insulating layer.

According to some alternative embodiments of the utility model, the first guard includes first and second guard portions detachably connected, the first and second guard portions together defining a receiving cavity for receiving the overlap portion.

According to some embodiments of the utility model, the battery pack includes: the battery assembly is arranged in the battery box, the battery energy distribution unit is arranged on one side of the battery box along the first direction, the battery box comprises a lower shell and a cross beam arranged in the lower shell, the cross beam extends along the second direction and is positioned between two adjacent battery modules, and the second direction is perpendicular to the first direction;

the battery assembly further comprises an isolation structural member, the isolation structural member comprises an isolation member, the isolation member is an insulation member, the isolation member is U-shaped and clamped on the cross beam, and the first connecting copper bar and the second bus copper bar pass through the upper wiring of the isolation member.

According to some alternative embodiments of the present utility model, the insulating structure further includes a second protection member, the second protection member is disposed on the insulating member and defines a routing channel with the insulating member, the first connection copper bar and the second bus copper bar are routed through the routing channel, and the second protection member is detachably connected with the insulating member.

According to some embodiments of the utility model, the first output terminal and the second output terminal are both formed with a mating groove, the first connection copper bar includes a second body portion and a mating portion, the second body portion extends along the first direction, the two mating portions are arranged at intervals along the first direction, the two mating portions are connected to the same side of the second body portion, the mating portion is accommodated in the mating groove and is in conductive contact with an inner wall of the mating groove, the mating portion is connected with the first output terminal or the second output terminal through a second fastener, the second fastener is an insulating member, and an outer surface of the second body portion is covered with a second insulating layer.

According to some embodiments of the utility model, the battery pack comprises a battery management unit, a high-voltage sampling wire harness is connected between the battery management unit and the battery energy distribution unit, the battery energy distribution unit is provided with a second connecting copper bar, the free end of the second connecting copper bar is bent to form a connecting lug, and the high-voltage sampling wire harness is provided with a connecting terminal;

the battery pack further comprises an inserting structure, the inserting structure is an insulating structure and is provided with a first inserting groove and a second inserting groove communicated with the first inserting groove, the connecting lug is inserted into the first inserting groove, and the connecting terminal is inserted into the second inserting groove and is in conductive contact with the connecting lug.

According to some alternative embodiments of the present utility model, the mating structure includes a first mating shell and a second mating shell detachably connected to the second mating shell and collectively defining the first mating groove and the second mating groove.

According to some alternative embodiments of the present utility model, the battery energy distribution unit includes a high voltage connector and a relay, the high voltage connector and the relay are connected by a high voltage harness, and the high voltage harness includes a soft copper bar and a third insulating layer coated on an outer surface of the soft copper bar.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a partial structural view of a battery pack according to some embodiments of the present utility model;

FIG. 2 is a partial block diagram of another angle of the battery pack of FIG. 1;

fig. 3 is an enlarged view at a in fig. 2;

fig. 4 is a perspective view of a partial structure of the battery pack of fig. 1;

fig. 5 is an enlarged view at B in fig. 4;

fig. 6 is a perspective view of a partial structure of the battery pack of fig. 1;

fig. 7 is an enlarged view at C in fig. 6;

fig. 8 is an enlarged view at D in fig. 6;

fig. 9 is a perspective view of the battery energy distribution unit of fig. 1;

fig. 10 is an enlarged view at E in fig. 9;

FIG. 11 is another angular perspective view of the battery energy distribution unit of FIG. 1;

fig. 12 is an enlarged view at F in fig. 11;

FIG. 13 is another angular perspective view of the battery energy distribution unit of FIG. 1;

fig. 14 is a schematic illustration of the connection of the high voltage sampling harness of fig. 1 to a patch structure.

Reference numerals:

100. a battery pack;

10. a battery assembly;

11. a battery module; 12. a first battery module; 14. a third battery module; 15. a fourth battery module; 16. a first output terminal; 17. a second output terminal; 18. a mating groove;

19. a first connecting copper bar; 20. a second body portion; 21. a mating portion;

22. a first busbar copper;

23. a second bus bar copper bar; 24. copper bars are used for sub-bus; 25. a first body portion; 26. a lap joint; 27. an extension; 28. a first bending part; 29. a second bending part; 30. a third bending part; 31. a first fastener;

32. a first guard; 33. a first guard; 34. a second guard; 35. a receiving chamber;

36. isolating the structural member; 37. an insulating member; 38. a clamping groove; 39. a second threaded hole;

40. a second guard; 41. a buckle; 42. a first threaded hole; 43. a second fastener; 44. the first limiting structural member; 45. a first threaded fastener;

50. a battery energy distribution unit; 51. a high voltage connector; 52. a relay;

53. a high voltage harness; 54. thirdly, connecting copper bars; 55. a soft copper bar; 56. a third insulating layer;

57. the second connecting copper bar; 58. a connecting lug;

59. a high voltage sampling harness;

60. a plug-in structure; 61. a first socket groove; 62. a second insertion groove; 63. a first plug housing; 64. a second plug housing; 65. rolling the belt;

70. a battery case; 71. a lower housing; 72. and a cross beam.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

A battery pack 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 14.

As shown in fig. 1 to 14, a battery pack 100 according to an embodiment of the present utility model includes: a battery assembly 10 and a battery energy distribution unit 50. The battery assembly 10 includes a plurality of battery modules 11, a first connection copper bar 19, a first bus copper bar 22, and a second bus copper bar 23, the plurality of battery modules 11 being arranged in a first direction (refer to the e1 direction in the drawing), each battery module 11 having a first output terminal 16 and a second output terminal 17, one of the first output terminal 16 and the second output terminal 17 being a positive electrode and the other being a negative electrode, the first connection copper bar 19 connecting the first output terminal 16 of one of the adjacent two battery modules 11 with the second output terminal 17 of the other. The battery energy distribution unit 50 is disposed at one side of the battery assembly 10 along a first direction (refer to the e1 direction in the drawing), wherein one end of the first bus bar 22 is connected to the first output terminal 16 of the battery module 11 closest to the battery energy distribution unit 50, the other end of the first bus bar 22 is connected to the battery energy distribution unit 50, one end of the second bus bar 23 is connected to the second output terminal 17 of the battery module 11 farthest from the battery energy distribution unit 50, the other end of the second bus bar 23 is connected to the battery energy distribution unit 50, the second bus bar 23 includes a plurality of sub-bus bars 24 arranged along the first direction (refer to the e1 direction in the drawing), the plurality of sub-bus bars 24 are respectively formed independently, and two adjacent sub-bus bars 24 overlap.

One end of the second bus bar copper 23 is connected with the second output terminal 17 of the battery module 11 farthest from the battery energy distribution unit 50, the other end of the second bus bar copper 23 is connected with the battery energy distribution unit 50, the length of the second bus bar copper 23 is longer, the longer copper bar is easy to break due to poor rigidity and structural strength, the second bus bar copper 23 is changed into a plurality of sub bus bar copper bars 24 distributed along the first direction, the second bus bar copper 23 is changed into a plurality of short sub bus bar copper bars 24 from one long copper bar, and the two adjacent sub bus bar copper bars 24 are connected in a lap joint mode.

Alternatively, the battery assembly 10 includes four battery modules 11, the battery module 11 closest to the battery energy distribution unit 50 is the first battery module 12, and the battery modules 11 arranged in the direction away from the battery energy distribution unit 50 in the first direction (refer to the e1 direction in the drawing) are the first battery module 12, the second battery module, the third battery module 14, and the fourth battery module 15 in this order. For example, the first output terminal 16 is a positive electrode, the second output terminal 17 is a negative electrode, the first connection copper bar 19 is three, the negative electrode of the first battery module 12 is connected with the positive electrode of the second battery module through the first connection copper bar 19, the negative electrode of the second battery module is connected with the positive electrode of the third battery module 14 through the first connection copper bar 19, the negative electrode of the third battery module 14 is connected with the positive electrode of the fourth battery module 15 through the first connection copper bar 19, the positive electrode of the first battery module 12 is connected with the battery energy distribution unit 50 through the first bus copper bar 22, and the negative electrode of the third battery module 14 is connected with the battery energy distribution unit 50 through the second bus copper bar 23.

Alternatively, the second bus bar copper 23 includes three sub-bus bars 24 arranged in the first direction (refer to the e1 direction in the drawing), and the connection strength of the second bus bar copper 23 can be improved by dividing one long second bus bar copper 23 into three short sub-bus bars 24 arranged in the first direction.

According to the battery pack 100 of the present utility model, one end of the second bus bar copper 23 is connected to the second output terminal 17 of the battery module 11 farthest from the battery energy distribution unit 50 and the other end is connected to the battery energy distribution unit 50, and by providing the second bus bar copper 23 as a plurality of sub-bus bar copper bars 24 and providing adjacent two sub-bus bar copper bars 24 as lap joints, the rigidity and structural strength of the second bus bar copper bar 23 can be improved, thereby being advantageous in solving the problem that the second bus bar copper bar 23 is easily broken.

According to some embodiments of the present utility model, referring to fig. 2 and 3, the sub-bus copper bars 24 include a first body portion 25, a lap joint portion 26, and an extension portion 27 connected between the first body portion 25 and the lap joint portion 26, the first body portion 25 extending in a first direction (referring to the e1 direction in the drawings), the extension portion 27 having an angle with the first body portion 25 and extending in a direction away from the battery module 11, the lap joint portion 26 extending in the first direction (referring to the e1 direction in the drawings), the lap joint portions 26 of two adjacent sub-bus copper bars 24 being overlapped and connected, the lap joint portions 26 of two adjacent sub-bus copper bars 24 being connected or welded by a first fastener 31. This arrangement can strengthen the connection strength of the junction of the adjacent two sub-bus copper bars 24 by stacking and connecting the lap joint portions 26, and the connection is more reliable and stable, thereby being favorable to strengthening the structural strength of the second bus copper bar 23, and the structure of this arrangement is simple, and the production and the manufacturing of the sub-bus copper bars 24 are facilitated.

For example, the lap joint portions 26 of two adjacent sub-bus copper bars 24 are connected by a first fastener 31, and the first fastener 31 can be a bolt, so that the arrangement is stable in connection and convenient to install and detach; for another example, the lap joint portions 26 of the adjacent two sub-bus bars 24 are connected by welding, and the arrangement connection is reliable and stable.

Optionally, the first main body portion 25 extends along the first direction (refer to the e1 direction in the drawing), the extending portion 27 and the first main body portion 25 have an included angle of 90 degrees and extend towards a direction away from the battery module 11, and the overlap portion 26 and the extending portion 27 have an included angle of 90 degrees and extend along the first direction (refer to the e1 direction in the drawing), so that the arrangement structure is simple, the production and manufacturing of the sub-bus copper bar 24 are convenient, and the production efficiency can be improved.

According to some alternative embodiments of the present utility model, referring to fig. 1, 2, 4 and 6, the battery assembly 10 further includes: the first guard 32, the first guard 32 is an insulating member, the first guard 32 is covered outside the lap joint portion 26, and the outer surfaces of the extension portion 27 and the first main body portion 25 are covered with a first insulating layer. By providing the outer surfaces of the extension portion 27 and the first body portion 25 with the first insulating layer, an installation worker can be protected, and short-circuiting between the extension portion 27 and the first body portion 25 and other components in the battery pack 100 due to conduction can be avoided. By covering the first protection member 32 outside the lap joint 26, the lap joint 26 can be insulated, the protection effect on the installation staff can be enhanced, and the conduction between the lap joint 26 and other parts in the battery pack 100 can be effectively prevented.

According to some alternative embodiments of the present utility model, referring to fig. 1, 2, 4 and 6, the first guard 32 includes a first guard 33 and a second guard 34 detachably connected, and the first guard 33 and the second guard 34 together define a receiving cavity 35 for receiving the overlap 26. The first protection piece 32 is arranged to be the first protection part 33 and the second protection part 34, the structure is simple, the installation and the disassembly are convenient, the production efficiency can be improved, and the first protection part 33 and the second protection part 34 can play a good role in insulation and protection on the lap joint part 26 through jointly defining the accommodating cavity 35.

Optionally, the first protection portion 33 and the second protection portion 34 are connected by means of a clamping connection, so that the first protection portion 33 and the second protection portion 34 can be conveniently mounted and dismounted, the first limit structural members 44 are arranged on two opposite sides of the extension of the first protection portion 33 and the second protection portion 34 along the first direction (refer to the e1 direction in the drawing), the first limit structural members 44 are used for fixedly connecting and limiting the first protection portion 33 and the second protection portion 34, and the first protection member 32 can be prevented from shaking in the working process of the battery pack 100.

According to some embodiments of the present utility model, referring to fig. 1-7, a battery pack 100 includes a battery case 70. The battery assembly 10 is provided in the battery case 70, and the battery energy distribution unit 50 is provided at one side of the battery case 70 in the first direction (refer to the e1 direction in the drawing). The battery case 70 includes a lower case 71 and a cross member 72 provided in the lower case 71, the cross member 72 extending in a second direction (refer to the e2 direction in the drawing) perpendicular to the first direction (refer to the e1 direction in the drawing) and being positioned between the adjacent two battery modules 11. The battery assembly 10 further includes an isolation structure 36, the isolation structure 36 includes an isolation member 37, the isolation member 37 is an insulating member, the isolation member 37 is U-shaped and is clamped on the beam 72, and the first connection copper bar 19 and the second bus copper bar 23 are routed above the isolation member 37. Through establishing the insulating member 37 card on the crossbeam 72, can prevent electrically conductive between first connection copper bar 19 and second busbar copper bar 23 and the crossbeam 72 to through establishing the insulating member 37 to the U-shaped, can wrap up the surface of crossbeam 72 betterly, thereby can make insulating member 37 to the crossbeam 72, between first connection copper bar 19 and the second busbar copper bar 23 insulating effect betterly.

Optionally, the sub-bus bar 24 includes a first main body portion 25, a first bending portion 28, a second bending portion 29 and a third bending portion 30, the first bending portion 28 extends along a second direction (refer to an e2 direction in the drawing) and forms an angle of 90 degrees with the first main body portion 25, the second bending portion 29 forms an angle of 90 degrees with the first bending portion 28 and connects the first bending portion 28 and the third bending portion 30, the third bending portion 30 extends along the first direction (refer to an e1 direction in the drawing) and forms an angle of 90 degrees with the second bending portion 29, the third bending portion 30 is located above the insulating member 37, and the first bending portion 28, the second bending portion 29 and the third bending portion 30 are all tightly attached to the insulating member 37. The first connection copper bar 19 is directly routed through the upper part of the isolation piece 37, and the first connection copper bar 19 is located below the third bending part 30, so that the height difference is conveniently displayed when the first connection copper bar 19 and the second bus copper bar 23 pass through the cross beam 72, the first connection copper bar 19 and the second bus copper bar 23 can be effectively prevented from being in contact with each other and conducting, and the short circuit of the battery module 11 can be avoided.

According to some alternative embodiments of the present utility model, referring to fig. 2, 4, 5 and 6, the insulating structure 36 further includes a second protection member 40, the second protection member 40 is disposed on the insulating member 37 and defines a routing channel with the insulating member 37, the first connection copper bar 19 and the second bus copper bar 23 are routed through the routing channel, and the second protection member 40 is detachably connected with the insulating member 37. This setting can prevent to electrically conduct between first connection copper bar 19 and second copper bar 23 and the other spare part in the battery package 100, can effectively play insulating guard action when installing, maintaining the spare part in the battery package 100 to through establishing second protector 40 and isolation piece 37 to detachable the connection, the installation and the dismantlement of the second protector 40 of being convenient for.

Optionally, the second protection member 40 is formed with a first threaded hole 42 and provided with a buckle 41, the isolation member 37 is formed with a second threaded hole 39 and provided with a clamping groove 38, the second protection member 40 can play a role in positioning the second protection member 40 by inserting the buckle 41 into the clamping groove 38, and the first threaded fastener 45 is connected with the second protection member 40 and the isolation member 37 by penetrating through the first threaded hole 42 and the second threaded hole 39, so that the second protection member 40 is convenient to mount and dismount, and the connection is stable and reliable.

According to some embodiments of the present utility model, referring to fig. 6 and 8, the first output terminal 16 and the second output terminal 17 are each formed with a fitting groove 18, the first connection copper bar 19 includes a second body portion 20 and a fitting portion 21, the second body portion 20 extends in a first direction (referring to an e1 direction in the drawings), the fitting portions 21 are two and are arranged at intervals in the first direction (referring to the e1 direction in the drawings), the two fitting portions 21 are connected to the same side of the second body portion 20, the fitting portion 21 is accommodated in the fitting groove 18 and contacts an inner wall of the fitting groove 18, the fitting portion 21 is connected to the first output terminal 16 or the second output terminal 17 through a second fastener 43, the second fastener 43 is an insulating member, and an outer surface of the second body portion 20 is covered with a second insulating layer. By accommodating the mating portion 21 of the first connection copper bar 19 in the mating groove 18 of the first output terminal 16 or the second output terminal 17, the mating portion 21 of the first connection copper bar 19 can be directly inserted into the mating groove 18 of the first output terminal 16 or the second output terminal 17 and fixed by an insulating member, and compared with the original connection mode that the first connection copper bar 19 is overlapped with the first output terminal 16 or the second output terminal 17, the arrangement can have a better insulating protection effect on an installer, and the connection part of the mating portion 21 and the mating groove 18 can be prevented from conducting electricity with other parts in the battery pack 100.

According to some embodiments of the present utility model, referring to fig. 9-13, a battery pack 100 includes a battery management unit with a high voltage sampling harness 59 connected between the battery management unit and the battery energy distribution unit 50. The battery power distribution unit 50 has a second connection copper bar 57, a free end of the second connection copper bar 57 is bent to form a connection lug 58, and a high-voltage sampling harness 59 has a connection terminal. The battery pack 100 further includes a plugging structure 60, the plugging structure 60 is an insulating structure, the plugging structure 60 has a first plugging slot 61 and a second plugging slot 62 communicating with the first plugging slot 61, the connection lug 58 is inserted into the first plugging slot 61, and the connection terminal is inserted into the second plugging slot 62 and contacts with the connection lug 58.

The high-voltage sampling wire harness 59 has a plurality of plug-in structures 60 in the battery energy distribution unit 50 corresponding to the high-voltage wire harness 53, the high-voltage sampling wire harness 59 is used for analyzing and measuring the electric potential of the plug-in position, and the connection and disconnection of the circuit in the battery energy distribution unit 50 can be judged through the measured electric potential, so that the fault position of the battery energy distribution unit 50 can be conveniently judged when the fault occurs. Through inserting the engaging lug 58 into the first inserting groove 61 and inserting the engaging terminal into the second inserting groove 62, contact between the engaging lug 58 and the engaging terminal is realized, and the inserting structure 60 can provide insulation protection for the engaging lug 58 and the engaging terminal, so that workers can be safer during assembly operation, and the inserting manner is convenient for installing and maintaining the engaging lug 58 and the engaging terminal.

According to some alternative embodiments of the present utility model, referring to fig. 14, the mating structure 60 includes a first mating shell 63 and a second mating shell 64, the first mating shell 63 and the second mating shell 64 being detachably connected and together defining a first mating groove 61 and a second mating groove 62. This arrangement is simple in structure, and the production manufacturing of the plug structure 60 of being convenient for is convenient for the installation, dismantlement and the maintenance of plug structure 60.

Optionally, the plugging structure 60 further includes a rolling belt 65, and the rolling belt 65 may be used to fix the first plugging shell 63 and the second plugging shell 64, so that the plugging structure 60 and the connecting lug 58 can be connected more stably.

According to some alternative embodiments of the present utility model, referring to fig. 9 to 13, the battery power distribution unit 50 includes a high voltage connector 51 and a relay 52, the high voltage connector 51 and the relay 52 are connected by a high voltage harness 53, and the high voltage harness 53 includes a soft copper bar 55 and a third insulation layer 56 coated on an outer surface of the soft copper bar 55. The space inside the battery energy distribution unit 50 occupied by the original copper bars for connecting the high-voltage connector 51 and the relay 52 is reduced by changing the original hard copper bars into the soft copper bars 55, a large number of copper bars are prevented from occupying the space inside the battery energy distribution unit 50, and the problem that the hard copper bars cannot be branched is solved by setting the high-voltage wire harness 53 to include the soft copper bars 55, so that the space utilization rate inside the battery energy distribution unit 50 is improved.

For example, the battery power distribution unit 50 is a dual system, and if two sets of copper bar lines are required to be designed by adopting hard copper bars, the two sets of copper bar lines occupy more battery power distribution unit 50. The high-voltage wire harness 53 includes the soft copper bar 55, and can perform high-voltage transmission with the dual-system battery module 11 in the battery pack 100 by utilizing the characteristic that the soft copper bar 55 can be branched, so that the space of the high-voltage wire harness 53 occupying the interior of the battery energy distribution unit 50 is reduced.

Alternatively, the high voltage connector 51 is connected to the high voltage wire harness 53 through the third connection copper bar 54, for example, the connection manner of the third connection copper bar 54 and the high voltage wire harness 53 may be welding, which facilitates connection of the high voltage connector 51 to the high voltage wire harness 53, and the connection is stable and reliable.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, comprising:

the battery assembly comprises a plurality of battery modules, a first connecting copper bar, a first bus copper bar and a second bus copper bar, wherein the battery modules are distributed along a first direction, each battery module is provided with a first output terminal and a second output terminal, one of the first output terminal and the second output terminal is an anode, the other is a cathode, and the first connecting copper bar is connected with the first output terminal of one of two adjacent battery modules and the second output terminal of the other;

a battery energy distribution unit provided at one side of the battery assembly in the first direction;

one end of the first bus bar is connected with the first output terminal of the battery module closest to the battery energy distribution unit, and the other end of the first bus bar is connected with the battery energy distribution unit; one end of the second bus bar is connected with the second output terminal of the battery module farthest from the battery energy distribution unit, the other end of the second bus bar is connected with the battery energy distribution unit, the second bus bar comprises a plurality of sub bus bars distributed along the first direction, the sub bus bars are respectively and independently formed, and two adjacent sub bus bars are lapped.

2. The battery pack according to claim 1, wherein the sub-bus copper bars include a first main body portion, a lap joint portion, and an extension portion connected between the first main body portion and the lap joint portion, the first main body portion extends in the first direction, an included angle is formed between the extension portion and the first main body portion, the extension portion extends in a direction away from the battery module, the lap joint portion extends in the first direction, the lap joint portions of two adjacent sub-bus copper bars are stacked and connected, and the lap joint portions of two adjacent sub-bus copper bars are connected or welded by a first fastener.

3. The battery pack of claim 2, wherein the battery assembly further comprises: the first protection piece is an insulating piece, the first protection piece is covered outside the lap joint part, and the outer surfaces of the extending part and the first main body part are covered with a first insulating layer.

4. The battery pack of claim 3, wherein the first guard includes first and second guard portions detachably connected, the first and second guard portions collectively defining a receiving cavity for receiving the overlap portion.

5. The battery pack according to claim 1, comprising: the battery assembly is arranged in the battery box, the battery energy distribution unit is arranged on one side of the battery box along the first direction, the battery box comprises a lower shell and a cross beam arranged in the lower shell, the cross beam extends along the second direction and is positioned between two adjacent battery modules, and the second direction is perpendicular to the first direction;

6. The battery pack of claim 5, wherein the insulating structure further comprises a second shield member covering the insulating member and defining a routing channel with the insulating member, the first connecting copper bar and the second bussing copper bar being routed through the routing channel, the second shield member being removably connected to the insulating member.

7. The battery pack according to claim 1, wherein the first output terminal and the second output terminal are each formed with a mating groove, the first connection copper bar includes a second main body portion and mating portions, the second main body portion extends in the first direction, the mating portions are two and are arranged at intervals in the first direction, the two mating portions are connected to the same side of the second main body portion, the mating portions are accommodated in the mating grooves and are in conductive contact with inner walls of the mating grooves, the mating portions are connected with the first output terminal or the second output terminal through second fasteners, the second fasteners are insulating members, and the outer surfaces of the second main body portion are covered with second insulating layers.

8. The battery pack according to any one of claims 1-7, wherein the battery pack comprises a battery management unit, a high-voltage sampling wire harness is connected between the battery management unit and the battery energy distribution unit, the battery energy distribution unit is provided with a second connecting copper bar, the free end of the second connecting copper bar is bent to form a connecting lug, and the high-voltage sampling wire harness is provided with a connecting terminal;

9. The battery pack of claim 8, wherein the plug structure comprises a first plug housing and a second plug housing, the first plug housing and the second plug housing being removably connected and together defining the first plug slot and the second plug slot.

10. The battery pack of any one of claims 1-7, wherein the battery energy distribution unit comprises a high voltage connector and a relay connected by a high voltage harness comprising a soft copper bar and a third insulating layer coating an outer surface of the soft copper bar.