CN220628139U - Busbar bracket assembly and battery pack with same - Google Patents

Abstract

The utility model discloses a busbar bracket assembly and a battery pack with the same, wherein the busbar bracket assembly comprises: the bus bar support assemblies are arranged at intervals along the first direction, each bus bar support assembly comprises a bus bar support and a plurality of inter-cell bus bars, and the plurality of inter-cell bus bars are sequentially arranged on the bus bar support along the first direction; the two ends of the bridging busbar in the first direction are respectively connected with the two adjacent busbar bracket assemblies, a deformation part is formed between the two ends of the bridging busbar, and the deformation part can elastically deform in the first direction. The busbar bracket assembly is simple in structure, convenient and easy to connect and fix, convenient to reduce production cost, improves space utilization rate in the battery pack, and enables connection of battery monomers to be more stable and reliable.

Description

Busbar bracket assembly and battery pack with same

Technical Field

The utility model relates to the technical field of batteries, in particular to a busbar bracket assembly and a battery pack with the same.

Background

In the long-term development process of society, full and effective utilization and squeezing of space become common processing means and solutions in many fields, in a power battery, in order to improve the electric quantity and energy density of the battery to meet the requirements of vehicle endurance and the like, continuous improvement and perfection of design and arrangement of various components in the battery pack are often required, so that the limited space of the battery pack is fully and effectively utilized. Currently, a CTP (Cell To Pack) structure mode or an LCTP (Long Cell To Pack long Cell-Pack) structure mode is adopted for the battery Pack, so that intermediate structural members from the cells To the battery Pack are reduced, and the grouping rate and the space utilization rate of the battery Pack are improved. In the related art, a plurality of electric cores in the battery pack are matched to form a structure similar to a plurality of modules, connecting pieces are required to be arranged in the bus bars to electrically connect adjacent modules, the connecting piece structure is complex, the production cost is high, and the occupied space is large.

Disclosure of Invention

The present utility model has been made based on the findings of the inventors of the present application regarding the following facts and problems:

in the related art, a cross beam is arranged in a battery pack, in order to electrically connect a plurality of battery monomers at two sides of the cross beam, a middle connecting structural member is generally added at the base position of the cross beam to connect the plurality of battery monomers at two sides close to an output pole of the cross beam, and more installation and fixing operations and parts are needed during assembly, so that the production cost of the battery pack is higher, and more parts occupy more space in the battery pack; or two bus bars with male plug-in connectors and female plug-in connectors are respectively fixed with the supporting frames at the two sides and then connected with the female plug-in connectors through the male plug-in connectors, so that the cost is high, more installation and fixing operations are needed during assembly, the space occupied by the male plug-in connectors and the female plug-in connectors is large, and the space utilization rate in the battery pack is reduced.

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model aims to provide the busbar bracket assembly, which can simplify the connecting structure, save the production cost and reduce the space occupation.

The utility model also provides a battery pack with the busbar bracket assembly.

The busbar bracket assembly according to the first aspect of the present utility model includes: the bus bar support assemblies are arranged at intervals along a first direction, each bus bar support assembly comprises a bus bar support and a plurality of inter-cell bus bars, and the plurality of inter-cell bus bars are sequentially arranged on the bus bar support along the first direction; the two ends of the bridging busbar in the first direction are respectively connected with the two adjacent busbar bracket assemblies, a deformation part is formed between the two ends of the bridging busbar, and the deformation part can be elastically deformed in the first direction.

According to the busbar bracket assembly, the plurality of busbar bracket assemblies and the bridging busbar are arranged, the two ends of the bridging busbar are respectively connected with the adjacent busbar brackets, the deformation part is formed between the two ends of the bridging busbar, the structure is simple, the connection and the fixation are convenient and easy, the production cost is reduced, the space utilization rate in the battery pack is improved, and the connection of the battery monomers is more stable and reliable.

In addition, the busbar bracket assembly according to the embodiment of the utility model can also have the following additional technical characteristics:

in some embodiments of the utility model, the deformation extends along a curve or fold line protruding in the thickness direction of the jumper bus bar in a direction from one end to the other end of the jumper bus bar.

In some embodiments of the present utility model, the bridging busbar includes a connecting portion and a bridging portion, the connecting portion extends vertically, the connecting portion is connected to the busbar bracket assembly, the connecting portion is two and is arranged at intervals along the first direction, and two ends of the bridging portion in the first direction are respectively connected to vertical upper ends of the two connecting portions.

In some embodiments of the present utility model, a riveting column is disposed on a side of the busbar support facing the jumper busbar, and a riveting hole is disposed on the jumper busbar and/or the inter-cell busbar, and the riveting column is riveted in the riveting hole.

In some embodiments of the utility model, the busbar bracket assembly further comprises: the flexible circuit board is connected with the busbar bracket, and the inter-cell busbars and/or the bridging busbars are electrically connected with the flexible circuit board through the connecting pieces.

In one embodiment of the present utility model, the flexible circuit board includes: the plate comprises a plate body and a plurality of connecting cantilevers, wherein one ends of the connecting cantilevers are connected with the plate body, and the other ends of the connecting cantilevers are connected with the connecting pieces.

In some embodiments of the utility model, the thickness of the crossover bus is 1.2mm or greater.

In some embodiments of the present utility model, foolproof structures are provided on the inter-cell buss bars and/or the crossover buss bars.

In some embodiments of the present utility model, the bus bar support is provided with a plurality of partition ribs, and the partition ribs are arranged between two adjacent inter-cell buses, or the partition ribs are arranged between the inter-cell buses and the bridging buses.

The battery pack according to the second aspect of the present utility model includes: the shell is internally provided with a cross beam extending perpendicular to the first direction; a plurality of battery cells arranged in a stacked manner along the first direction and respectively arranged on both sides of the cross beam in the first direction; according to the busbar bracket assembly of the first aspect of the present utility model, the crossover busbar is connected between two of the busbar bracket assemblies on both sides of the width of the cross beam.

According to the battery pack disclosed by the utility model, the busbar bracket assembly of the first aspect is arranged, a plurality of busbar bracket assemblies and the bridging busbars are arranged, two ends of the bridging busbars are respectively connected with the adjacent busbar brackets, the deformation parts are formed between the two ends of the bridging busbars, the structure is simple, the connection and fixation are convenient and easy, the production cost is reduced, the space utilization rate in the battery pack is improved, and the connection of the bridging busbars to the battery cells is more stable and reliable.

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

FIG. 1 is a schematic view of a busway bracket assembly according to an embodiment of the present utility model;

FIG. 2 is a schematic illustration of a buss bar bracket assembly and a jumper buss bar according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram at A shown in FIG. 2;

FIG. 4 is a schematic diagram of a jumper bus according to an embodiment of the utility model;

FIG. 5 is a schematic diagram of an inter-cell bus bar according to an embodiment of the present utility model;

fig. 6 is a schematic view of a busbar holder according to an embodiment of the present utility model.

Reference numerals:

10. a busbar bracket assembly;

11. a busbar support; 111. riveting a column; 112. a separation rib; 113. a groove; 114. positioning columns; 115. a through hole; 116. a pressure relief hole; 117. avoidance holes; 118. a fitting hole;

12. a flexible circuit board; 121. a plate main body; 122. connecting the cantilever; 123. positioning holes;

13. a bus bar between the electric cores; 131. a stretching section; 14. a connecting sheet;

20. a jumper bus; 21. a connection part; 22. a bridging portion; 221. a deformation section;

301. riveting holes; 302. a via hole; 303. fool-proof holes;

100. a bus bar bracket assembly.

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 and intended to explain the present utility model and should not be construed as limiting the utility model.

First, a battery pack according to a second aspect of the present utility model will be briefly described with reference to fig. 1 to 6, the battery pack including a case in which a cross beam extending perpendicular to a first direction (left and right directions as viewed in fig. 1) is provided, a plurality of battery cells arranged in a stacked manner along the first direction and disposed on both sides of the cross beam in the first direction, and a bus bar holder assembly 100 for connecting the plurality of battery cells in series-parallel and electrically connecting the plurality of battery cells on both sides of the cross beam.

A busbar bracket assembly 100 according to an embodiment of the first aspect of the present utility model is described below with reference to fig. 1 to 6.

Referring to fig. 1 and 4, a bus bar bracket assembly 100 according to an embodiment of the first aspect of the present utility model includes: the bus bar support assembly 10 comprises a bus bar support 11 and a plurality of inter-cell buses 13, wherein the plurality of bus bar support assemblies 10 are arranged at intervals along a first direction, and the plurality of inter-cell buses 13 are sequentially arranged on the bus bar support 11 along the first direction; the both ends of the crossover bus bar 20 in the first direction are respectively connected to the adjacent two bus bar bracket assemblies 10, and a deformation portion 221 is formed between the both ends of the crossover bus bar 20, and the deformation portion 221 is elastically deformable in the first direction.

In this embodiment, the plurality of inter-cell bus bars 13 are fixed on the bus bar bracket 11, the bus bar bracket 11 can perform a good supporting and fixing function on the plurality of inter-cell bus bars 13, when a plurality of battery cells are electrically connected, the inter-cell bus bars 13 can connect two adjacent battery cells, so as to sequentially connect the plurality of battery cells along the first direction, and the plurality of bus bar bracket assemblies 10 arranged at intervals can respectively electrically connect the plurality of battery cells on two sides of the beam.

When a plurality of battery monomers on two sides of the beam are electrically connected to form a unified circuit structure, the bridging busbar 20 can be arranged at the position of the beam, two ends of the bridging busbar 20 in the first direction can be respectively fixed on the busbar brackets 11 on two sides and electrically connected with the output poles of the battery monomers on two sides, so that the circuit of the battery monomers on two sides is communicated to form the unified circuit structure, and the connection is convenient and easy.

In this embodiment, when assembling the plurality of bus bar bracket assemblies 10 and the bridging bus bar 20, the bridging bus bar 20 can be connected and fixed with the inter-cell bus bar 13 and the bus bar bracket 11, and is arranged in the battery pack together with the bus bar bracket assembly, so that the installation and the fixation are convenient.

The bridging busbar 20 of this embodiment is simple in structure, and the installation is fixed convenient, and manufacturing cost is lower, has less space occupation, makes the space utilization in the battery package higher, and then can promote the energy density of battery package to a certain extent.

It can be appreciated that, in the long-term use process, a certain expansion occurs in the stacking direction of the battery cells, and the distance between the two output poles connected with the bridging busbar 20 along with the expansion of the corresponding battery cells in the first direction increases, in this embodiment, the deformation portion 221 is formed between the two ends of the bridging busbar 20, and the deformation portion 221 can elastically deform in the first direction, so that the bridging busbar 20 can adapt to the expansion of the battery cells through the deformation of the deformation portion 221 in the first direction, and the stability and reliability of the electrical connection of the bridging busbar 20 to the battery cells on the two sides of the cross beam are better.

According to the busbar bracket assembly 100 of the embodiment of the utility model, by arranging the plurality of busbar bracket assemblies 10 and the bridging busbar 20, two ends of the bridging busbar 20 are respectively connected with the adjacent busbar brackets 11, and the deformation part 221 is formed between the two ends of the bridging busbar 20, so that the busbar bracket assembly is simple in structure, convenient and easy to connect and fix, convenient to reduce the production cost, improves the space utilization rate in the battery pack, and ensures that the connection of the battery monomers is more stable and reliable.

In some embodiments of the present utility model, as shown in fig. 4, the deformation 221 may extend along a curve or a fold line protruding in the thickness direction of the crossover bus 20 in a direction from one end to the other end of the crossover bus 20.

In this embodiment, the deformation portion 221 may extend along a protrusion in the thickness direction of the bridging busbar 20 toward the battery cell, the deformation portion 221 may also extend along a protrusion in the thickness direction of the bridging busbar 20 toward a direction away from the battery cell, the protrusion may be a curved or broken line, for example, the protrusion may be a semi-arc-shaped protrusion or a wavy protrusion, and the protrusion may also be a protrusion formed with a plurality of broken lines. Alternatively, the deformation portion 221 may extend in an arc shape protruding in the thickness direction of the crossover bus bar 20.

In this embodiment, the deformation portion 221 is configured to extend along a curve or a fold line protruding in the thickness direction of the bridging busbar 20, so that the deformation portion 221 has good ductility in the first direction, and when the deformation portion 221 is deformed in the first direction, the deformation portion 221 can be stretched well in the first direction, so as to accommodate expansion of the battery cell. Simple structure and good stretching effect.

In some embodiments of the present utility model, as shown in fig. 1 and 4, the jumper bus bar 20 has a shape of a plate body 121 extending in a vertical direction, the jumper bus bar 20 includes a connection portion 21 and a jumper portion 22, the connection portion 21 extends in the vertical direction (up-down direction as shown in fig. 1), the connection portion 21 is connected to the bus bar bracket assembly 10, the connection portion 21 is two and arranged at intervals in a first direction, and both ends of the jumper portion 22 in the first direction are connected to the vertical upper ends of the two connection portions 21, respectively.

The bridging busbar 20 is provided with two connecting portions 21 and is distributed along the first direction at intervals, the bridging busbar 20 can be stably and reliably connected and fixed with busbar brackets 11 on two sides of the cross beam through the connecting portions 21 and is connected with output poles of the battery cells, the two connecting portions 21 are communicated through bridging portions 22, specifically, when the bridging busbar 20 is actually installed and arranged, the connecting portions 21 can be respectively located on two sides of the cross beam, the bridging portions 22 are arranged on the upper side of the cross beam, two ends of the bridging portions 22 in the first direction are respectively connected with the connecting portions 21 on two sides of the cross beam, and then the output poles of the battery cells on two sides of the cross beam are communicated.

The present embodiment provides the jumper bus bar 20 in the shape of the plate body 121 extending in the vertical direction and is provided with the connection portion 21 and the jumper portion 22, and is simple in structure and convenient in connection arrangement. Alternatively, the deformed portion 221 of the crossover bus bar 20 is provided on the crossover portion 22.

In one embodiment of the present utility model, referring to fig. 3 and 4, the connection portion 21 and the bridging portion 22 may cooperate to define a relief groove, which is downwardly open. Therefore, the installation space in the vertical direction can be reduced when the bridging busbar 20 is arranged on the cross beam, a good avoidance effect is achieved on the cross beam, the bridging busbar 20 and the cross beam are arranged in a matched mode, the space arrangement in the battery pack can be optimized to a certain extent, and the space utilization rate of the battery pack is improved.

In some examples of the present utility model, referring to fig. 3 and 4, the bridging portion 22 may be horizontally disposed and extend in the first direction, and the upper ends of both the connection portions 21 may be connected to the bridging portion 22 at one side in the extending direction of the cross member.

According to the embodiment, the bridging part 22 is horizontally arranged, so that the dimension of the bridging part 22 in the vertical direction can be reduced, the length dimension of the cross beam in the vertical direction can be properly increased during processing and production, the structural strength of the shell of the battery pack is better, and the overall structural strength of the battery pack is better. It should be noted that, the connection portion 21 in the bridging busbar 20 needs to be electrically connected with the battery cells having the output poles at two sides of the beam, the vertical dimension of the connection portion 21 needs to be adapted to the vertical dimension of the battery cells, and the vertical position of the bridging busbar 20 is higher than the upper end of the battery cells when the bridging busbar 20 is horizontally arranged, so that the bridging busbar 20 structure of the embodiment can be adopted when the upper portion of the battery cells is not provided with a cold plate structure.

In some embodiments of the present utility model, the thickness of the crossover bus 20 may be 1.2mm or greater.

Therefore, the bridging busbar 20 has enough thickness to maintain good structural strength, the deformation of the bridging busbar 20 during transportation or assembly is reduced, the connection and fixation of the bridging busbar 20 are more reliable and stable, and good overcurrent effect is achieved. For example, the thickness of the crossover bus 20 may be 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, etc. Preferably, the thickness of the crossover bus 20 is 1.2mm.

In some embodiments of the present utility model, as shown in fig. 3, the crossover bus bar 20 and the inter-cell bus bar 13 may be disposed on a side of the bus bar bracket 11 facing away from the battery cells, and the bus bar bracket 11 may have a plurality of through holes 115 formed thereon, the plurality of through holes 115 being in one-to-one correspondence with the connection portions 21 of the crossover bus bar 20 and the inter-cell bus bar 13, and the inter-cell bus bar 13 and the crossover bus bar 20 being adapted to be electrically connected to the corresponding battery cells through the through holes 115.

According to the embodiment, the inter-cell bus bar 13 and the bridging bus bar 20 are arranged on one side, deviating from a battery monomer, of the bus bar support 11, the bus bar support 11 can play a role in certain separation protection on the inter-cell bus bar 13, the bridging bus bar 20 and the battery monomer, specifically, one side, facing the battery monomer, of the bus bar support 11 is abutted against the battery monomer, and the other side, deviating from the battery monomer, of the bus bar support 11 is fixedly connected with the inter-cell bus bar 13 and the bridging bus bar 20, so that the inter-cell bus bar 13 and the bridging bus bar 20 can have good installation arrangement space, influences of the battery monomer on the inter-cell bus bar 13 and the bridging bus bar 20 are reduced, for example, when thermal runaway occurs to the battery monomer, the bus bar support 11 can play a certain separation role, and stability is better and more reliable after the inter-cell bus bar 13 and the bridging bus bar 20 are assembled and used.

In this embodiment, the plurality of through holes 115 are formed on the bus bar bracket 11, and the through holes 115 are in one-to-one correspondence with the connecting portions 21 of the inter-cell bus bar 13 and the bridging bus bar 20, so that the electrical connection between the inter-cell bus bar 13 and the bridging bus bar 20 to the plurality of battery cells is easy and convenient.

In one embodiment of the present utility model, as shown in fig. 5, a tensile portion 131 deformable in the first direction is formed between both ends of the inter-cell bus bar 13 in the first direction, the tensile portion 131 extends vertically, and the tensile portion 131 extends in a curve protruding in the thickness direction of the inter-cell bus bar 13 in the direction from one end to the other end of the inter-cell bus bar 13.

According to the embodiment, the stretching part 131 capable of deforming along the first direction is arranged on the inter-cell bus bar 13, so that the inter-cell bus bar 13 deforms along the first direction when a plurality of battery cells expand to adapt to the expansion of the battery cells, and the connection between the inter-cell bus bar 13 and the adjacent battery cells is more stable and reliable. Alternatively, the stretching portion 131 may extend in an arc shape protruding in the thickness direction of the inter-cell bus bar 13.

In some examples of the present utility model, as shown in fig. 3 and 5, the inter-cell buss bar 13 is formed with a via 302, the via 302 being adapted to be opposite to the post addressing hole of the battery cell in the thickness direction. Therefore, when the inter-cell bus bar 13 is welded with the battery single pole, the welding equipment can conveniently conduct identification addressing from the through hole 302 according to the exposed pole addressing hole, and the structure is simple, and welding operation is convenient. Alternatively, the aperture of the via 302 may be 2.5mm larger than the post addressing hole, which may better ensure that the post addressing hole is exposed from the via 302.

In some examples of the present utility model, as shown in fig. 3 and 6, the busbar support 11 may be formed with a plurality of grooves 113, the grooves 113 are disposed in a one-to-one correspondence with the stretching portions 131 of the inter-cell busbar 13, the grooves 113 are shaped to fit the stretching portions 131, and the stretching portions 131 are disposed in the grooves 113.

Therefore, the connection and fixation of the bus bar 13 and the bus bar bracket 11 between the battery cells can be more compact and firm, and meanwhile, the bus bar bracket 11 can also have certain capacity of deforming along the first direction at the groove 113, so that the bus bar bracket assembly 100 can better adapt to the position change of a plurality of battery monomers in the first direction when the battery monomers expand, and the connection and fixation of the bus bar bracket assembly 100 and the battery monomers are more stable and reliable.

In some embodiments of the present utility model, as shown in fig. 3 and 6, a side of the busbar holder 11 facing the jumper busbar 20 may be provided with a rivet hole 301, and the jumper busbar 20 and/or the inter-cell busbar 13 may be provided with a rivet hole 301, and the rivet hole 301 may be riveted with the rivet hole 111.

In this embodiment, the bridging busbar 20 and/or the inter-cell busbar 13 is/are connected and fixed with the busbar bracket 11 by means of the riveting connection between the riveting holes 301 and the riveting columns 111, so that the structure is simple, and the fixation is convenient and firm. Optionally, the cross-over buss 20 and/or inter-cell buss 13 are heat staked. Alternatively, the crossover bus bar 20 and/or the inter-cell bus bar 13 may be connected by gluing.

In one embodiment of the present utility model, as shown in fig. 4, the connection portion 21 of the crossover bus 20 may be provided with a plurality of rivet holes 301, the plurality of rivet holes 301 being arranged at vertical intervals. This makes it possible to connect and fix the jumper bus bar 20 to the bus bar bracket 11 more firmly and reliably. For example, the rivet holes 301 may be provided with two, three, four, etc. Preferably, the connection portion 21 is provided with two caulking holes 301, and the two caulking holes 301 are provided at both ends of the connection portion 21 in the vertical direction, respectively.

In one embodiment of the present utility model, as shown in fig. 5, the inter-cell bus bar 13 may be provided with a plurality of rivet holes 301, and the plurality of rivet holes 301 are arranged at intervals in the first direction at the upper end of the inter-cell bus bar 13. Thus, the connection and fixation of the inter-cell bus bar 13 and the bus bar bracket 11 can be more stable and reliable. For example, the staking holes 301 may be provided with two, three, four, five, six, etc. Preferably, the inter-cell bus bar 13 is provided with two caulking holes 301, and the two caulking holes 301 are provided at both ends of the inter-cell bus bar 13 in the first direction, respectively.

In one embodiment of the present utility model, the diameter of the rivet 111 may be 4mm or 5mm, and the diameter of the rivet hole 301 may be set to 4.4mm or 5.4mm, respectively.

It will be appreciated that certain dimensional deviations can occur in the actual processing of the inter-cell bus bar 13, the jumper bus bar 20 and the bus bar bracket 11, especially when the inter-cell bus bar 13 or the jumper bus bar 20 is provided with a plurality of rivet holes 301, the distances between the rivet holes 301 are deviated, in this embodiment, the diameter of the rivet holes 301 is set larger than that of the rivet posts 111, so that the situation that dimensional deviations occur can be better adapted when the rivet holes 301 are in rivet connection with the rivet posts 111, and thus the inter-cell bus bar 13 and the jumper bus bar 20 are more convenient and easier to rivet with the bus bar bracket 11.

In one embodiment of the present utility model, the bus bar bracket 11 may be a plastic suction member. This allows the bus bar bracket 11 to be manufactured at a lower cost and the bus bar bracket 11 to be lighter in weight.

In one embodiment of the utility model, the bus bar bracket 11 may be a polycarbonate piece. In this way, the busbar bracket 11 has good strength and toughness and certain flame retardance, thereby better playing roles of supporting and fixing as well as separating and protecting.

In some examples of the utility model, the thickness of the busbar holder 11 may be 0.5mm-0.8mm. Therefore, the bus bar bracket 11 has good supporting and fixing strength, so that the bus bar 13 and the bridging bus bar 20 between the battery cells are better supported and fixed, and meanwhile, the bus bar bracket 11 is prevented from being too thick to reduce the space utilization rate in the battery pack, and the bus bar bracket 11 is more convenient and easy to arrange. For example, the thickness of the busbar holder 11 may be 0.5mm, 0.6mm, 0.7mm, 0.8mm, or the like. Preferably, the thickness of the busbar holder 11 is 0.5mm.

In some embodiments of the present utility model, as shown in fig. 2 and 3, the busbar bracket assembly 10 may further include: the flexible circuit board 12 and a plurality of connection pieces 14, the flexible circuit board 12 is connected with the bus bar bracket 11, and the inter-cell bus bars 13 and/or the bridging bus bars 20 are electrically connected with the flexible circuit board 12 through the connection pieces 14.

In this embodiment, the connecting piece 14 connects the plurality of inter-cell buses 13 and/or the bridging buses 20 with the flexible circuit board 12 to sample parameters such as voltage, current, temperature, etc., so that the structure is simple, the connection is convenient and easy, the installation and arrangement are convenient, the occupied space is small, and the space utilization rate of the battery pack can be improved to a certain extent, thereby enabling the battery pack to have larger energy density.

In one embodiment of the present utility model, as shown in fig. 2 and 3, the flexible circuit board 12 may include: the plate body 121 and a plurality of connecting cantilevers 122, one end of the connecting cantilevers 122 is connected to the plate body 121, and the other end of the connecting cantilevers 122 is connected to the connecting piece 14.

Therefore, the connecting cantilever 122 is arranged in the flexible circuit board 12 to connect the board main body 121 with the connecting sheet 14, the structure is simple, and when a plurality of connecting sheets 14 are connected with the flexible circuit bar, the connecting cantilever 122 can play a certain positioning connection effect, so that the connection between the board main body 121 and the connecting sheet 14 is more convenient.

In some examples of the utility model, as shown in fig. 3, at least a portion of the connecting cantilever 122 extends in a first direction. In this way, when the plurality of cells are expanded, the connecting cantilever 122 can adapt to the deformation of the connecting piece 14 in the first direction in cooperation with the displacement of the connecting piece 14 along the first direction under the influence of the expansion of the cells, so that the connection between the connecting piece 14 and the plate main body 121 is more stable and reliable.

In some examples of the present utility model, referring to fig. 3 and 6, the bus bar bracket 11 may further be formed with a relief hole 117, and the connection cantilever 122 may be disposed at least partially opposite to the relief hole 117 in the thickness direction of the bus bar. Therefore, when the connection surface of the inter-cell bus bar 13 or the bridging bus bar 20 and the connection piece 14 and the connection surface of the connection cantilever 122 and the connection piece 14 are located on different planes in the thickness direction, the connection cantilever 122 can deflect towards the avoidance hole 117 so that the connection surface of the connection cantilever 122 is flush with the connection surface of the inter-cell bus bar 13 or the bridging bus bar 20, and therefore bending of the connection piece 14 is reduced, and connection of the connection piece 14 is more stable and reliable.

In some embodiments of the present utility model, as shown in fig. 1 and 6, the busbar bracket 11 may be further formed with a pressure relief hole 116, and the pressure relief hole 116 is provided with a plurality of explosion-proof valves arranged in one-to-one correspondence with the explosion-proof valves on the battery cells. Therefore, when the explosion-proof valve is sprayed, high-temperature gas can flow out of the pressure relief hole 116 more conveniently, and the explosion-proof valve is simple in structure and good in use effect.

In one embodiment of the present utility model, as shown in fig. 3 and 6, the busbar support 11 may further be formed with a plurality of positioning columns 114, the positioning columns 114 are disposed in plurality, the positioning columns 114 are disposed at intervals along the first direction, the plate body 121 is provided with a plurality of positioning holes 123, and the positioning holes 123 are disposed in plurality and correspond to the positioning columns 114 one by one. Thus, the flexible circuit board 12 and the bus bar bracket 11 can be well positioned and fixed, the assembly of the flexible circuit board 12 and the bus bar bracket 11 is easier,

in some examples of the utility model, the height of the positioning posts 114 may be 1.5mm-2.5mm. In this way, the positioning column 114 has a sufficient height so as to be matched with the positioning hole 123 for positioning, and meanwhile, the interference caused by the positioning column 114 on the assembly of the busbar bracket assembly 100 can be reduced, so that the busbar bracket assembly 100 is convenient to assemble in a battery pack. For example, the height of the positioning posts 114 may be 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, and so forth. Preferably, the height of the positioning posts 114 is 2mm.

Further, the diameter of the positioning post 114 may be 3mm, so that the positioning post 114 may be well matched with the positioning hole 123 for positioning, and in one example of the present utility model, the diameter of the positioning post 114 may be increased to perform hot riveting connection, where the space of the flexible circuit board 12 allows, so that the flexible circuit board 12 and the busbar bracket 11 are fixed by hot riveting.

In one embodiment of the present utility model, as shown in fig. 3 and 6, the bus bar bracket 11 may be further formed with a plurality of mounting holes 118, the plurality of mounting holes 118 being disposed at an upper end of the bus bar bracket 11 at intervals in the first direction, the mounting holes 118 being for cooperation with positioning pins of the positioning work of the bus bar bracket assembly 100.

In this embodiment, the plurality of assembly holes 118 are formed on the bus bar bracket 11, so that the positioning and fixing of the bus bar bracket assembly 100 can be more convenient during assembly, thereby facilitating the assembly operation of the bus bar bracket assembly 100.

In some embodiments of the present utility model, as shown in fig. 4 and 5, fool-proof structures may be provided on the inter-cell buss 13 and/or the crossover buss 20.

This advantageously prevents counter-assembly of the inter-cell buss bar 13 and/or the crossover buss bar 20 with the buss bar bracket 11, thereby facilitating assembly of the buss bar bracket assembly 100. Alternatively, the fool-proof structure may be a fool-proof hole 303, fool-proof protrusion, or the like. Preferably, the fool-proof structure is fool-proof hole 303. Alternatively, the fool-proof hole 303 may be a round hole, a square hole, a polygonal hole, a special-shaped hole, or the like.

In some embodiments of the present utility model, as shown in fig. 3 and 6, the bus bar bracket 11 may be provided with a plurality of partition ribs 112, the partition ribs 112 being disposed between two adjacent inter-cell bus bars 13, or the partition ribs 112 being disposed between the inter-cell bus bars 13 and the crossover bus bars 20.

In this embodiment, the bus bar bracket 11 is provided with the plurality of separation ribs 112 to separate the adjacent inter-cell bus bars 13 or the inter-cell bus bars 13 and the bridging bus bars 20, which can well play a role in electrical separation protection, avoid the occurrence of short circuits, and make the circuit stability of the bus bar bracket assembly 100 and the plurality of battery cells after assembly better.

A battery pack according to an embodiment of the second aspect of the present utility model is described below with reference to fig. 1 to 6.

Referring to fig. 1 to 6, a battery pack according to an embodiment of the second aspect of the present utility model includes: a housing, a plurality of battery cells, and a busbar bracket assembly 100 according to an embodiment of the first aspect of the present utility model, wherein a cross beam extending perpendicular to the first direction is provided in the housing; the plurality of battery cells are arranged in a stacked manner along the first direction and are respectively arranged at two sides of the cross beam in the first direction; the crossover bus 20 is connected between two bus bar bracket assemblies 10 on either side of the beam width.

Other constructions and operations of the battery pack according to the embodiment of the present utility model are known to those of ordinary skill in the art, and will not be described in detail herein.

According to the battery pack of the embodiment of the present utility model, by providing the busbar bracket assembly 100 of the first embodiment, providing the plurality of busbar bracket assemblies 10 and the bridging busbar 20, two ends of the bridging busbar 20 are respectively connected with the adjacent busbar brackets 11, and the deformation portion 221 is formed between two ends of the bridging busbar 20, so that the structure is simple, the connection and fixation are convenient and easy, the production cost is reduced, the space utilization rate in the battery pack is improved, and the connection of the battery cells is more stable and reliable.

A battery pack according to an embodiment of the present utility model will be described with reference to fig. 1 to 6.

As shown in fig. 1 to 6, the battery pack includes a bus bar bracket assembly 100, a housing, and a plurality of battery cells, the housing is formed with a beam extending perpendicular to a first direction, the plurality of battery cells are arranged in a stacked manner along the first direction and are respectively arranged at two sides of the beam, the plurality of battery cells are arranged at two ends of the battery cells in the extending direction of the beam, the bus bar bracket assembly 100 is provided with four bus bar bracket assemblies 10 and bridging buses 20, the four bus bar bracket assemblies 10 are respectively arranged at intervals in the extending direction of the first direction, the four buses are respectively arranged at two ends of the plurality of battery cells in the extending direction of the beam for electrically connecting the plurality of battery cells, the bridging buses 20 are arranged between the two bus bar bracket assemblies 10 at one end of the housing for connecting the two bus bar bracket assemblies 10, and the bridging buses 20 are aluminum plates of 1060H24 type.

The busbar bracket assembly 10 includes a busbar bracket 11, a flexible circuit board 12, a connecting piece 14, and a plurality of inter-cell busbars 13. The busbar support 11 is provided with assembly holes 118, through holes 115, avoidance holes 117 and pressure relief holes 116, the assembly holes 118 are two, the two assembly holes 118 are arranged at the upper end of the busbar support 11 and are arranged at intervals along the first direction, the through holes 115 are multiple, the multiple through holes 115 are arranged at intervals along the first direction, the avoidance holes 117 are multiple and are arranged at intervals along the first direction, the pressure relief holes 116 are multiple and are arranged at intervals along the first direction, and the multiple pressure relief holes 116 are respectively arranged in one-to-one correspondence with the explosion-proof valves of the multiple batteries.

The flexible circuit board 12 includes board main part 121 and connection cantilever 122, and connection cantilever 122 is equipped with a plurality of and extends along the first direction, and a plurality of connection cantilevers 122 and a plurality of hole 117 setting of dodging one-to-one, and the one end of connection cantilever 122 links to each other with board main part 121, and the other end of connection cantilever 122 is connected with the connection piece 14, and the connection piece 14 is the nickel piece, is equipped with three locating hole 123 along first direction interval arrangement on the board main part 121, is equipped with reference column 114 on the busbar support 11 correspondingly, and flexible circuit board 12 passes through locating hole 123 and reference column 114 cooperation location.

The cell-to-cell bus bars 13 are arranged at intervals along the first direction, the cell-to-cell bus bars 13 are arranged in one-to-one correspondence with the through holes 115, two ends of the cell-to-cell bus bars 13 along the first direction are respectively connected with two adjacent battery cells, two riveting holes 301 are formed at the upper ends of the cell-to-cell bus bars 13 along the first direction at intervals, the bus bar bracket 11 is correspondingly provided with two riveting columns 111, the cell-to-cell bus bars 13 are riveted and fixed with the riveting columns 111 through the riveting holes 301, the middle part of the cell-to-cell bus bars 13 is provided with a stretching part 131 which extends vertically, the stretching part 131 is an arc-shaped bulge in the thickness direction, the bus bar bracket 11 is correspondingly provided with a groove 113, the cell-to-cell bus bars bracket 11 is also provided with a separation rib 112 for separating the adjacent cell-to-cell bus bars 13 or between the cell-to-cell bus bars 13 and the bridging bus bars 20, the cell-to-cell bus bars 13 is also provided with a through hole 302 and a fool-proof hole 303, the through hole 302 is correspondingly arranged with the pole addressing hole of the battery cell.

The bridging busbar 20 comprises a connecting part 21 and a bridging part 22, wherein the connecting part 21 is provided with two ends which are respectively connected with the bridging part 22 along the first direction, the connecting part 21 is vertically arranged and provided with riveting holes 301 which are vertically arranged at the two ends of the connecting part 21 at intervals, and pole addressing holes, one connecting part 21 is provided with a foolproof hole 303, the busbar bracket 11 is correspondingly provided with a riveting column 111 and a matched through hole 115, and the bridging busbar 20 is fixedly connected with the busbar brackets 11 at the two sides through the riveting holes 301 and the riveting column 111; the bridging portion 22 is provided with a vertically extending deformation portion 221, the deformation portion 221 is an arc-shaped protrusion in the thickness direction, and the bridging portion 22 and the two connecting portions 21 are matched to define an avoidance groove convenient for the cross beam to pass through.

According to the battery pack of the embodiment of the present utility model, by providing the busbar bracket assembly 100 of the first embodiment, providing the plurality of busbar bracket assemblies 10 and the bridging busbar 20, two ends of the bridging busbar 20 are respectively connected with the adjacent busbar brackets 11, and the deformation portion 221 is formed between two ends of the bridging busbar 20, so that the structure is simple, the connection and fixation are convenient and easy, the production cost is reduced, the space utilization rate in the battery pack is improved, and the connection of the battery cells is more stable and reliable.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some 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 present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

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 (10)

1. A busbar bracket assembly, comprising:

the bus bar support assemblies are arranged at intervals along a first direction, each bus bar support assembly comprises a bus bar support and a plurality of inter-cell bus bars, and the plurality of inter-cell bus bars are sequentially arranged on the bus bar support along the first direction;

the two ends of the bridging busbar in the first direction are respectively connected with the two adjacent busbar bracket assemblies, a deformation part is formed between the two ends of the bridging busbar, and the deformation part can be elastically deformed in the first direction.

2. The busbar bracket assembly of claim 1, wherein the deformation portion extends along a curve or a fold line that is convex in a thickness direction of the jumper busbar in a direction from one end to the other end of the jumper busbar.

3. The buss bar bracket assembly of claim 1, wherein the cross-over buss bar comprises a connecting portion and a cross-over portion, the connecting portion extends vertically, the connecting portion is connected with the buss bar bracket assembly, the connecting portion is two and is arranged at intervals along the first direction, and two ends of the cross-over portion in the first direction are respectively connected with the vertical upper ends of the two connecting portions.

4. The busbar bracket assembly of claim 1, wherein a side of the busbar bracket facing the jumper busbar is provided with a rivet post, and the jumper busbar and/or the inter-cell busbar is provided with a rivet hole, and the rivet post is riveted in the rivet hole.

5. The busway bracket assembly of claim 1, further comprising: the flexible circuit board is connected with the busbar bracket, and the inter-cell busbars and/or the bridging busbars are electrically connected with the flexible circuit board through the connecting pieces.

6. The busbar bracket assembly of claim 5, wherein the flexible circuit board includes: the plate comprises a plate body and a plurality of connecting cantilevers, wherein one ends of the connecting cantilevers are connected with the plate body, and the other ends of the connecting cantilevers are connected with the connecting pieces.

7. The busbar bracket assembly of claim 1, wherein the thickness of the crossover busbar is 1.2mm or greater.

8. The buss bar support assembly of claim 1, wherein fool-proof structures are provided on the inter-cell buss bars and/or the crossover buss bars.

9. The buss bar support assembly of claim 1, wherein a plurality of spacer ribs are provided on the buss bar support, the spacer ribs being disposed between two adjacent inter-cell buss bars or between the inter-cell buss bars and the crossover buss bars.

10. A battery pack, comprising:

the shell is internally provided with a cross beam extending perpendicular to the first direction;

a plurality of battery cells arranged in a stacked manner along the first direction and respectively arranged on both sides of the cross beam in the first direction;

the busway bracket assembly of any of claims 1-9, the crossover busway being connected between two of the busway bracket assemblies on either side of the beam width.