CN216251013U - Cylindrical battery module - Google Patents

Abstract

The utility model provides a cylindrical battery module. The cylinder battery module includes: a first bracket; the CCS assembly and the first support form an installation cavity in a surrounding mode, the CCS assembly comprises an FPC (flexible printed circuit) board, a bus bar and a second support, the FPC board is connected with a sampling tab of the bus bar, and the bus bar is connected with the second support; the battery cell assembly is arranged in the installation cavity and comprises a plurality of groups of cylindrical battery cells, and the CCS assembly is installed on the positive electrode side of the battery cell assembly; the heat exchange assembly is arranged in the installation cavity and comprises a plurality of heat exchange plates arranged at intervals; a plurality of heat transfer boards set up with multiunit cylinder electricity core correspondingly, and each heat transfer board contacts rather than corresponding at least a set of cylinder electricity core to be used for cooling or heating at least a set of cylinder electricity core. The utility model effectively solves the problem of lower integration degree of the battery module in the prior art.

Description

Cylindrical battery module

Technical Field

The utility model relates to the technical field of batteries, in particular to a cylindrical battery module.

Background

Currently, cylindrical battery modules generally use small-capacity and small-diameter cells, such as the commonly known 18650 cells, 21700 cells. Being limited to self structure, the multiplying power is lower than square electric core charge-discharge rate in the small capacity and minor diameter electricity core, often can not realize big multiplying power charge-discharge very hardly.

However, in the prior art, the number of grouped monomers is large, the grouping process is complex, the grouping cost is high, the integration degree of the cylindrical battery module is low, and the difficulty in assembling the battery module by workers is increased.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a cylindrical battery module to solve the problem of low integration degree of the battery module in the prior art.

In order to achieve the above object, the present invention provides a cylindrical battery module including: a first bracket; the CCS assembly and the first support form an installation cavity in a surrounding mode, the CCS assembly comprises an FPC (flexible printed circuit) board, a bus bar and a second support, the FPC board is connected with a sampling tab of the bus bar, and the bus bar is connected with the second support; the battery cell assembly is arranged in the installation cavity and comprises a plurality of groups of cylindrical battery cells, and the CCS assembly is installed on the positive electrode side of the battery cell assembly; the heat exchange assembly is arranged in the installation cavity and comprises a plurality of heat exchange plates arranged at intervals; a plurality of heat transfer boards set up with multiunit cylinder electricity core correspondingly, and each heat transfer board contacts rather than corresponding at least a set of cylinder electricity core to be used for cooling or heating at least a set of cylinder electricity core.

Furthermore, each group of cylindrical battery cells comprises a plurality of sub-cylindrical battery cells which are arranged at intervals along a first preset direction and/or a second preset direction; the heat exchange plates are arranged at intervals along a first preset direction or a second preset direction; wherein, the first preset direction and the second preset direction are arranged in an included angle.

Furthermore, each heat exchange plate extends into two adjacent groups of cylindrical battery cores to be in contact with the outer peripheral surfaces of the sub-cylindrical battery cores of at least one group of cylindrical battery cores.

Further, each heat exchange plate comprises a plurality of arc-shaped plate sections, the arc-shaped plate sections are arranged at intervals along the extending direction of the heat exchange plate, and each arc-shaped plate section is matched with at least part of the outer peripheral surface of the corresponding sub-cylindrical battery cell.

Furthermore, each heat exchange plate is bonded with at least one group of corresponding cylindrical battery cores through heat conducting glue.

Furthermore, the first bracket is provided with a first through hole and a plurality of mounting concave parts, the mounting concave parts and the sub-cylindrical battery cells are arranged in a one-to-one correspondence manner, and each mounting concave part is used for mounting the corresponding sub-cylindrical battery cell; the cylinder battery module still includes: the supporting cylinder is arranged on the first support and is positioned at the first through hole, the supporting cylinder is provided with a second through hole, the second through hole is communicated with the first through hole through an inner cavity of the supporting cylinder, and the supporting cylinder is used for penetrating a fastener; wherein, the supporting cylinder is made of insulating material.

Further, the first bracket includes: the bracket body is provided with a first through hole and a mounting concave part; the mounting ring is arranged on the surface of the support body facing the electric core assembly, the mounting ring is communicated with the first through hole, and the support cylinder extends into the mounting ring and is limited and stopped by the mounting ring.

Further, the cylinder battery module still includes: the isolation belts extend into the two adjacent groups of cylindrical battery cells; the isolation belts are arranged at intervals along a first preset direction or a second preset direction, and each isolation belt is arranged to avoid each heat exchange plate; wherein, the insulating tape is made of insulating materials, and the insulating materials comprise ceramic fiber paper, mica paper and aerogel adhesive.

Further, the cylinder battery module still includes: the insulating layer covers one side, far away from the electric core assembly, of the CCS assembly and is made of an insulating material; the glue film sets up the one side of keeping away from electric core subassembly at first support to be used for bonding the cylinder battery module in the box.

Further, the insulating layer has the third through-hole, and the glue film has the fourth through-hole, and the third through-hole communicates with the second through-hole, and the fourth through-hole communicates with first through-hole, and third through-hole and fourth through-hole are used for supplying the fastener to wear to establish.

Further, the bus bar includes: the busbar body comprises a first row body and a second row body, the first row body is electrically connected with the positive electrode of one sub-cylindrical battery cell, the second row body is electrically connected with the negative electrode of the other sub-cylindrical battery cell, and the two sub-cylindrical battery cells are adjacently arranged along a first preset direction; the plurality of bus bodies are arranged at intervals along a second preset direction; a plurality of connecting portions each for connecting two adjacent bus bar bodies; wherein, the width m of the first row body and the width n of the connecting part satisfy the following relation: m is more than or equal to 3n and less than or equal to 12 n.

By applying the technical scheme of the utility model, the electric core assembly comprises a plurality of groups of cylindrical electric cores, and a CCS (cell connecting system) is arranged on the positive electrode side of the electric core assembly and is used for electrically connecting and sampling the plurality of groups of cylindrical electric cores. The heat exchange plates are arranged at a plurality of intervals of the heat exchange assembly, the heat exchange plates are correspondingly arranged with the plurality of groups of cylindrical battery cores, and each heat exchange plate is in contact with at least one group of corresponding cylindrical battery cores to cool or heat the at least one group of cylindrical battery cores, so that the cylindrical battery module works at the best temperature interval. Like this, the cylinder battery module is by CCS subassembly, electric core subassembly and heat exchange assemblies integration together, can simplify group's technology and reduce the processing cost effectively, has solved the lower problem of the degree of integration of battery module among the prior art.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 shows an exploded view of an embodiment of a cylindrical battery module according to the present invention;

fig. 2 is a perspective view illustrating a first bracket of the cylindrical battery module of fig. 1;

fig. 3 is a schematic perspective view illustrating a heat exchange assembly of the cylindrical battery module of fig. 1;

fig. 4 is a perspective view illustrating a support can of the cylindrical battery module of fig. 1;

fig. 5 is a perspective view illustrating a CCS assembly of the cylindrical battery module of fig. 1;

FIG. 6 shows an enlarged schematic view at C of the second bracket of FIG. 5; and

fig. 7 shows a partial sectional view of the cylindrical battery module in fig. 1.

Wherein the figures include the following reference numerals:

10. a first bus bar; 11. a bus bar body; 111. a first row body; 112. a second row of bodies; 12. a connecting portion; 20. a sub-cylindrical cell; 21. a positive electrode; 22. a negative electrode; 60. sampling a tab; 80. a first bracket; 81. a first through hole; 82. a mounting recess; 83. a stent body; 84. a mounting ring; 90. a CCS component; 91. an FPC board; 92. a bus bar; 93. a second bracket; 94. a CCS component mounting hole; 100. an electrical core assembly; 110. a heat exchange assembly; 1101. a heat exchange plate; 1111. an arc-shaped plate section; 1102. a header pipe; 120. a support cylinder; 121. a second through hole; 122. a limiting ring; 130. an insulating tape; 140. an insulating layer; 141. a third through hole; 150. a glue layer; 151. and a fourth via.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless stated to the contrary, use of the directional terms "upper and lower" are generally directed to the orientation shown in the drawings, or to the vertical, or gravitational direction; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; "inner and outer" refer to the inner and outer relative to the profile of the respective member itself, but the above directional terms are not intended to limit the present invention.

In order to solve the lower problem of the degree of integration of battery module among the prior art, this application provides a cylinder battery module.

As shown in fig. 1 to 7, the cylindrical battery module includes a first bracket 80, a CCS assembly 90, a cell assembly 100, and a heat exchange assembly 110. The CCS assembly 90 and the first support 80 form a mounting cavity therebetween, the CCS assembly 90 includes an FPC board 91, a bus bar 92 and a second support 93, the FPC board 91 is connected to the sampling tab 60 of the bus bar 92, and the bus bar 92 is connected to the second support 93. Battery assembly 100 sets up in the installation cavity, and battery assembly 100 includes the multiunit cylinder electricity core, and CCS subassembly 90 installs on the positive pole side of battery assembly 100. Heat exchange assembly 110 is disposed in the installation cavity, and heat exchange assembly 110 includes a plurality of heat exchange plates 1101 arranged at intervals. A plurality of heat exchange plates 1101 are disposed corresponding to the plurality of groups of cylindrical cells, and each heat exchange plate 1101 is in contact with at least one group of cylindrical cells corresponding thereto, so as to cool or heat at least one group of cylindrical cells.

By applying the technical scheme of the present embodiment, the cell assembly 100 includes a plurality of sets of cylindrical cells, and the CCS assembly 90 is mounted on the positive electrode side of the cell assembly 100, so as to electrically connect and sample the plurality of sets of cylindrical cells. The heat exchange plates 1101 that heat exchange assembly 110 a plurality of intervals set up, a plurality of heat exchange plates 1101 set up with multiunit cylinder electricity core correspondingly, each heat exchange plate 1101 contacts rather than corresponding at least a set of cylinder electricity core to be used for cooling or heating at least a set of cylinder electricity core, and then make cylinder battery module work in the best temperature interval. Like this, the cylinder battery module is in the same place by CCS subassembly 90, electric core subassembly 100 and heat exchange assemblies 110 integration, can simplify effectively and organize technology and reduce the processing cost, has solved the lower problem of the degree of integration of battery module among the prior art.

In this embodiment, the heat exchange plate 1101 is a cold plate to cool or heat the electric core assembly 100 through the cold plate. Meanwhile, the problem of insufficient longitudinal space can be solved by using the serpentine cold plate for heat exchange.

In this embodiment, the model of the sub-cylindrical battery cell 20 of each group of cylindrical battery cells is 46800 cylindrical battery cells or 46950 cylindrical battery cells, the capacity of the sub-cylindrical battery cell 20 is above 20Ah, and the discharge rate is above 2C, that is, the battery cell assembly 100 in this embodiment is a large-diameter, large-capacity cylindrical battery cell. Like this, the cylinder battery module in this embodiment has promoted the degree of integrating under the prerequisite of increase capacity.

In this embodiment, the bus bars 92 are welded to the positive and negative poles of the positive side of the cell assembly 100, to make electrical connection between the sets of cylindrical cells,

in this embodiment, each heat exchange plate 1101 corresponds to two adjacent sets of cylindrical battery cells, so as to cool, or heat and cool, the two sets of cylindrical battery cells. Wherein the surface of each group of cylindrical cells facing heat exchange plate 1101 is in contact with heat exchange plate 1101.

Optionally, each group of cylindrical battery cells includes a plurality of sub-cylindrical battery cells 20, and the plurality of sub-cylindrical battery cells 20 are arranged at intervals along a first preset direction and/or a second preset direction. The plurality of heat exchange plates 1101 are arranged at intervals along a first preset direction or a second preset direction. Wherein, the first preset direction and the second preset direction are arranged in an included angle. Therefore, on one hand, the arrangement of the sub-cylindrical battery cell 20 is more flexible, so that different use requirements and working conditions are met, and the processing flexibility of workers is improved; on the other hand makes heat transfer board 1101 can carry out abundant cooling or heating to each group's cylinder electricity core, avoids the cylinder battery module to generate heat seriously, has promoted the operational reliability of cylinder battery module. Simultaneously, above-mentioned setting makes the inner structure overall arrangement of cylinder battery module reasonable more, compact, make full use of inner space.

Optionally, the first preset direction is a length direction of the cylindrical battery module, and the second preset direction is a width direction of the cylindrical battery module.

Specifically, heat transfer board 1101 is six, and six heat transfer boards 1101 set up along the width direction interval of cylinder battery module, and each heat transfer board 1101 extends along the length direction of cylinder battery module, has reduced the quantity of heat transfer board 1101 under the prerequisite of guaranteeing to carry out abundant cooling or heating to each group cylinder electricity core, and the staff of being convenient for maintains and the dismouting heat transfer subassembly 110. It should be noted that the number of the heat exchange plates 1101 is not limited thereto, and may be adjusted according to the working condition and the use requirement. Optionally, the number of heat exchange plates 1101 is three, or four, or five, or seven, or more.

It should be noted that, the arrangement direction of the plurality of heat exchange plates 1101 is not limited thereto, and may be adjusted according to the working condition and the use requirement. Optionally, a plurality of heat exchange plates 1101 are arranged at intervals along the length direction of the cylindrical battery module, and each heat exchange plate 1101 extends along the width direction of the cylindrical battery module.

As shown in fig. 3, the heat exchange assembly 110 further includes two manifolds 1102, each heat exchange plate 1101 has a containing cavity for containing a cooling medium or a cooling liquid, and the cooling medium or the cooling liquid flows in the containing cavity to realize heat exchange between the sub-cylindrical battery cells 20 and the heat exchange plates 1101. Each header pipe 1102 is communicated with each containing cavity, one header pipe 1102 is communicated with the liquid supply device to convey the refrigerant or the cooling liquid in the liquid supply device to each containing cavity, and one header pipe 1102 is used for enabling the cooled refrigerant or the cooled cooling liquid to flow back into the liquid supply device through each containing cavity so as to realize the circulating flow of the refrigerant or the cooling liquid in the heat exchange assembly 110.

Optionally, each heat exchange plate 1101 extends into two adjacent sets of cylindrical cells to contact the outer peripheral surfaces of the sub-cylindrical cells 20 of at least one set of cylindrical cells. Like this, above-mentioned setting has increased the area of contact of each heat transfer board 1101 rather than the corresponding at least a set of cylinder electricity core, and then has promoted heat exchange assembly 110's cooling effect, has also reduced heat exchange assembly 110's whole occupation space, has promoted the inner space utilization of cylinder battery module.

In this embodiment, each heat exchange plate 1101 extends into two adjacent sets of cylindrical battery cells to contact with the outer peripheral surfaces of the sub-cylindrical battery cells 20 of the two sets of cylindrical battery cells, so that each set of cylindrical battery cells contacts with the heat exchange plate 1101 toward the outer peripheral surface of the heat exchange plate 1101, and the cooling area of the heat exchange plate 1101 and the sub-cylindrical battery cells 20 is further increased. On the premise of ensuring the cooling effect, the usage amount of the heat exchange plates 1101 is reduced, and then each heat exchange plate 1101 cools only a part of the outer peripheral surface of the sub-cylindrical battery core 20.

As shown in fig. 3, each heat exchange plate 1101 includes a plurality of arc-shaped plate segments 1111, the plurality of arc-shaped plate segments 1111 are disposed at intervals along the extending direction of the heat exchange plate 1101, and each arc-shaped plate segment 1111 is adapted to at least a portion of the outer peripheral surface of the corresponding sub-cylindrical battery core 20. Thus, the above arrangement not only makes the heat exchange plate 1101 easier to be disassembled from each group of cylindrical battery cells, avoids the occurrence of structural interference phenomenon, but also further increases the contact area between the heat exchange plate 1101 and the sub-cylindrical battery cells 20, thereby improving the cooling effect of the heat exchange assembly 110.

Specifically, each arc-shaped plate segment 1111 is coaxial with the outer peripheral surface of the corresponding sub-cylindrical battery cell 20, so that the arc-shaped plate segment 1111 and the corresponding sub-cylindrical battery cell 20 can be better contacted with each other, and the scratch of the sub-cylindrical battery cell 20 by a worker during the process of assembling and disassembling the heat exchange plate 1101 can be avoided.

Optionally, each heat exchange plate 1101 is bonded to at least one corresponding group of cylindrical cells by a heat conducting glue. Like this, above-mentioned setting has not only promoted the inner structure stability of cylinder battery module, avoids heat transfer plate 1101 and cylinder electricity core alternate segregation and influences the cooling effect of heat exchange assembly 110, also ensures that the heat that produces on the cylinder electricity core can conduct to heat transfer plate 1101 through the heat conduction glue on to carry out heat exchange with heat transfer plate 1101.

As shown in fig. 2 and 7, the first bracket 80 has a first through hole 81 and a plurality of mounting recesses 82, the plurality of mounting recesses 82 are provided in one-to-one correspondence with the plurality of sub-cylindrical cells 20, and each mounting recess 82 is used to mount the sub-cylindrical cell 20 corresponding thereto. The cylindrical battery module further includes a support cylinder 120. The supporting cylinder 120 is arranged on the first support 80 and located at the first through hole 81, the supporting cylinder 120 is provided with a second through hole 121, the second through hole 121 is communicated with the first through hole 81 through an inner cavity of the supporting cylinder 120, and the supporting cylinder 120 is used for penetrating a fastener. Wherein the support cylinder 120 is made of an insulating material. Like this, first support 80 is used for supporting, the cylindrical battery core of installation, and a support section of thick bamboo 120 is used for wearing to establish the fastener, plays supplementary fixed action, fixes cylindrical battery module at upper cover or in the box through the fastener. Meanwhile, the support cylinder 120 made of an insulating material can insulate the fastener, thereby preventing the normal operation of the cylindrical battery module from being affected by the short circuit phenomenon.

Optionally, the fastener is a screw or bolt.

Specifically, first support 80 bonds with each sub-cylinder electricity core 20, and a support section of thick bamboo 120 is used for wearing to establish the fastener and can support CCS subassembly 90, has promoted the structural strength and the structural stability of cylinder battery module. The fastener is worn to establish in second through-hole 121, the inner chamber of a support section of thick bamboo 120 and first through-hole 81 to connect cylinder battery module and upper cover and/or box.

As shown in fig. 2 and 7, the first bracket 80 includes a bracket body 83 and a mounting ring 84. Wherein the first through hole 81 and the mounting recess 82 are provided on the holder body 83. The mounting ring 84 is arranged on the surface of the bracket body 83 facing the electric core assembly 100, the mounting ring 84 is communicated with the first through hole 81, and the support barrel 120 extends into the mounting ring 84 and is limited and stopped by the mounting ring 84. Like this, above-mentioned setting makes the dismouting of a support section of thick bamboo 120 and first support 80 easier, simple and convenient, has reduced the dismouting degree of difficulty, also makes the overall structure of the first support 80 and a support section of thick bamboo 120 after accomplishing the assembly more firm, has promoted the structural stability of cylindrical battery module.

Specifically, the support cylinder 120 is a cylinder, and the mounting ring 84 is a circular ring, which is disposed coaxially with the cylinder.

As shown in fig. 4 and 7, the supporting cylinder 120 includes a cylinder body and a limiting ring 122 disposed on the cylinder body, wherein the limiting ring 122 is pressed on the mounting ring 84 and is limited and stopped with the mounting ring 84. The first through hole 81 is a circular hole, and the circular hole is coaxially arranged with the mounting ring 84.

As shown in fig. 1, the cylindrical battery module further includes a plurality of insulating tapes 130. Each isolation strip 130 extends into two adjacent groups of cylindrical cells; the isolation belts 130 are arranged at intervals along a first preset direction or a second preset direction, and each isolation belt 130 is arranged to be away from each heat exchange plate 1101. The insulating tape 130 is made of insulating material, which includes ceramic fiber paper, mica paper and aerogel. In this way, the insulating strip 130 plays a role of heat insulation and insulation, and prevents the heat exchange between two adjacent sets of cylindrical battery cores from affecting the cooling effect of the heat exchange assembly 110. Simultaneously, above-mentioned setting makes the inner structure overall arrangement of cylinder battery module reasonable more, compact, has promoted the interior space utilization.

Specifically, isolated area 130 is five, and five isolated areas 130 set up along the width direction interval of cylinder battery module, and each isolated area 130 extends along the length direction of cylinder battery module, and five isolated areas 130 and six heat transfer boards 1101 set up along the width direction interval of cylinder battery module, and only set up one heat transfer board 1101 or one isolated area 130 between two sets of adjacent cylinder electricity cores promptly.

In this embodiment, each isolated area 130 includes the isolated area section of arc that a plurality of intervals set up, and each isolated area section of arc is rather than the outer peripheral face looks adaptation of corresponding sub-cylinder electricity core 20, and then has increased each isolated area 130 and each group's contact area between the cylinder electricity core, has promoted the thermal-insulated, insulating effect of isolated area 130. Wherein, each arc-shaped isolation strip section is coaxially arranged with the outer peripheral surface of the corresponding sub-cylindrical battery cell 20.

It should be noted that the number of the isolation belts 130 is not limited to this, and may be adjusted according to the working condition and the use requirement. Optionally, the insulating strips 130 are three, or four, or six, or seven, or more.

As shown in fig. 1, the cylindrical battery module further includes an insulating layer 140 and a glue layer 150. Wherein the insulating layer 140 covers a side of the CCS assembly 90 away from the core assembly 100, the insulating layer 140 being made of an insulating material. The adhesive layer 150 is disposed on one side of the first support 80 away from the cell assembly 100 for bonding the cylindrical battery module in the case. In this way, the insulating layer 140 plays an insulating role, so as to prevent the cylindrical battery module from short-circuiting, and the cylindrical battery module is bonded in the box body through the glue layer 150, so that the structure of the assembled battery pack is more stable.

As shown in fig. 1, the insulating layer 140 has a third through hole 141, the adhesive layer 150 has a fourth through hole 151, the third through hole 141 is communicated with the second through hole 121, the fourth through hole 151 is communicated with the first through hole 81, and the third through hole 141 and the fourth through hole 151 are used for a fastener to penetrate. Like this, the fastener can pass cylindrical battery module and upper cover and/or box be connected is ensured in above-mentioned setting, and the staff of being convenient for carries out the dismouting to the battery package.

Optionally, the number of the fasteners is multiple, the number of the third through holes 141 is multiple, and the multiple third through holes 141 and the multiple fasteners are arranged in a one-to-one correspondence manner, so that the fastening reliability of the fasteners is improved.

Optionally, the number of the fasteners is multiple, the number of the fourth through holes 151 is multiple, and the multiple fourth through holes 151 and the multiple fasteners are arranged in a one-to-one correspondence manner, so that fastening reliability of the fasteners is improved.

As shown in fig. 6, CCS assembly 90 has CCS assembly mounting holes 94, and fasteners are inserted through CCS assembly mounting holes 94 to ensure that the fasteners can be inserted through first bracket 80, CCS assembly mounting holes 94, insulating layer 140 and adhesive layer 150.

As shown in fig. 6, the bus bar 92 includes a bus bar body 11 and a plurality of connecting portions 12. The busbar body 11 comprises a first row body 111 and a second row body 112, the first row body 111 is electrically connected with the positive electrode 21 of one sub-cylindrical battery cell 20, the second row body 112 is electrically connected with the negative electrode 22 of the other sub-cylindrical battery cell 20, and the two sub-cylindrical battery cells 20 are adjacently arranged along a first preset direction; the plurality of bus bar bodies 11 are arranged at intervals along the second preset direction. Each connecting portion 12 is used to connect two adjacent bus bar bodies 11. Like this, connect through connecting portion 12 between two adjacent busbar bodies 11, because the area of contact between first busbar body 111 and the anodal 21 has been increased in above-mentioned setting, the joint strength and the connection stability between first busbar body 111 and the anodal 21 have been promoted, in order to ensure that first busbar 10 can connect the major diameter, large capacity electricity core, avoid taking place to break away from each other and influence the electric connection validity of first busbar 10 between two adjacent sub-cylinder electricity cores 20 between first busbar 10 and electricity core subassembly 100, the electric connection validity of busbar subassembly to electricity core has been promoted.

Alternatively, the width m of the first row 111 and the width n of the connection portion 12 satisfy the following relationship: m is more than or equal to 3n and less than or equal to 12 n. In the present embodiment, the first row body 111 has a narrow diameter (connecting portion 12) between the sub-cylindrical cells 20 connected in parallel, the width of the narrow diameter is n, and the width of the current carrier (the width of the first row body 111) is m between the sub-cylindrical cells connected in series, so as to ensure electrical performance. Wherein, the design characteristics that the value of m is far greater than the value of n are as follows: m to ensure that bus 92 has sufficient current carrying capability, n functions as a fuse.

Note that the width m refers to the minimum width of the first row 111, and the width n refers to the minimum width of the connection portion 12.

In this embodiment, the bus-bar 92 is disposed on the positive side of the electric core assembly 100, that is, a single-side welding manner is employed between the bus-bar 92 and the electric core assembly 100, so as to facilitate disposing a cooling device on the negative side of the electric core assembly 100 or using the negative side of the electric core assembly 100 as an adhesion surface, thereby facilitating the grouping design of the electric cores ctp (cell to pack) and ctc (cell to sessions).

Specifically, CCS assembly 90 eliminates the conventional split low voltage harness collection and high voltage connectors and integrates them into one assembly, which may also be used as a part of the cell grouping assembly, thereby reducing the process steps and cost. After CCS subassembly 90 and electric core are in groups, because of having reduced the use of pencil, and effectively avoided the alternately of pencil, make electrical safety higher to the inefficacy risk that arouses because of the electric connector trouble has been reduced.

In this embodiment, the parallel direction of the sub-cylindrical battery cells 20 is parallel to the first bus bar 10 or approximately the same as the layout trend, and it is necessary to ensure that the high-voltage bus bar is connected to one side of the first bus bar 10 in series, and the low-voltage sampling is performed on the other side.

In the present embodiment, each connecting portion 12 is provided with a narrow fuse structure, and when the current flowing through the connecting portion 12 is greater than a predetermined current value, the narrow fuse structure generates heat to fuse the connecting portion 12. Thus, if a single sub-cylindrical battery cell 20 fails due to leakage or overdischarge or other abnormal factors existing in a certain sub-cylindrical battery cell 20, the sub-cylindrical battery cell 20 is reversely charged to cause overload equalization, and the connecting portion 12 is fused to avoid causing a secondary disaster or thermal runaway.

Specifically, be the fourth contained angle setting between the extending direction of narrow position fuse structure and each connecting portion 12 to ensure that the narrow position fuse structure can fuse connecting portion 12, promoted the fusing reliability of narrow position fuse structure.

In the present embodiment, the first bus bar 10 is an integrally formed structure. Like this, above-mentioned setting has not only promoted the structural strength of first busbar 10, has prolonged the life of first busbar 10, also makes the processing of first busbar 10 easier, simple and convenient, has reduced the processing cost and the processing degree of difficulty of busbar subassembly.

Alternatively, the thickness of the busbar body 11 is 0.5mm or more and 2.0mm or less. In this way, the arrangement ensures that the first bus bar 10 can normally carry current, so that all the sub-cylindrical cells 20 can normally operate, and the structure of the bus bar body 11 is simpler, and the processing and the implementation are easier. Simultaneously, the miniaturized design of busbar subassembly has been realized to above-mentioned setting, and then has reduced the whole occupation space of cylinder battery module.

In the present embodiment, the thickness of the busbar body 11 is 1.0 mm. The thickness of the bus bar body 11 is not limited to this, and may be adjusted according to the operating condition and the use requirement. Optionally, the thickness of the busbar body 11 is 0.8mm, or 1.2mm, or 1.5mm, or 1.6mm, or 1.8 mm.

Alternatively, each connecting portion 12 has a plate shape, and the plate thickness of the connecting portion 12 is 0.5mm or more and 2.0mm or less. Thus, the arrangement ensures that two adjacent bus bar bodies 11 can be electrically connected, so that the FPC board 91 samples a plurality of sub-cylindrical battery cells 20, and the bus bar bodies 11 are simpler in structure and easy to process and implement. Simultaneously, the miniaturized design of busbar subassembly has been realized to above-mentioned setting, and then has reduced the whole occupation space of cylinder battery module.

In the present embodiment, the plate thickness of the connecting portion 12 is 1.0mm, which corresponds to that of the busbar body 11. The thickness of the connecting portion 12 is not limited to this, and may be adjusted according to the operating conditions and the use requirements. Optionally, the thickness of the connecting portion 12 is 0.8mm, or 1.2mm, or 1.5mm, or 1.6mm, or 1.8 mm.

In the present embodiment, the first row body 111 is connected to the positive electrode 21 of the sub-cylindrical cell 20 by laser welding. Like this, the above-mentioned joint strength who sets up first row of body 111 and anodal 21 that has promoted has further promoted the busbar subassembly to the electric connection validity between electric core to ensure that cylinder battery module can normal operating.

In this embodiment, the second row 112 is connected to the negative electrodes 22 of the sub-cylindrical cells 20 by laser welding. Thus, the arrangement improves the connection strength between the second row body 112 and the negative electrode 22, and further improves the effectiveness of the electric connection between the busbar assembly and the battery cells, so as to ensure that the cylindrical battery module can normally run.

In this embodiment, the positive electrode 21 is cylindrical or annular, the outer peripheral surface of the first row 111 includes a first plane, an arc surface and a second plane, the first plane and the second plane are parallel to each other, and the arc surface and the positive electrode 21 are coaxial. Wherein, the distance between the first plane and the second plane is the width of the first row body 111.

Optionally, the first row body 111 and the positive electrode 21 are welded by using a ring-shaped welding spot layout to ensure the welding strength of the two. In this embodiment, the positive electrode welding area is semicircular, and a circular welding area or an annular welding area is reserved.

It should be noted that the solder joint layout is not limited to this, and can be adjusted according to the working condition and the use requirement. Optionally, the solder joint layout is in the shape of a bar or a star or other shapes.

It should be noted that the welding manner between the first row 111 and the positive electrode 21 is not limited to this, and may be adjusted according to the working condition and the use requirement. Alternatively, resistance welding or bonding welding is used between the first bank 111 and the positive electrode 21.

It should be noted that the welding between the first row 111 and the positive electrode 21 and between the second row 112 and the negative electrode 22 needs to meet the current-carrying requirement of the sub-cylindrical battery cells 20.

Optionally, the second row 112 and the negative electrode 22 are welded by using a ring-shaped welding spot layout to ensure the welding strength of the two.

It should be noted that the welding manner between the second row 112 and the negative electrode 22 is not limited to this, and may be adjusted according to the working condition and the use requirement. Optionally, resistance welding, or bonding welding, is used between the second row 112 and the negative electrode 22.

Optionally, the first bus bar 10 is made of 1-series aluminum, red copper, or copper-aluminum composite material, so that the material of the first bus bar 10 is more flexibly selected, different use requirements and different working conditions are met, and the processing flexibility of workers is improved.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

the electric core assembly comprises a plurality of groups of cylindrical electric cores, and the CCS assembly is arranged on the positive pole side of the electric core assembly and is used for electrically connecting and sampling the plurality of groups of cylindrical electric cores. The heat exchange plates are arranged at a plurality of intervals of the heat exchange assembly, the heat exchange plates are correspondingly arranged with the plurality of groups of cylindrical battery cores, and each heat exchange plate is in contact with at least one group of corresponding cylindrical battery cores to cool or heat the at least one group of cylindrical battery cores, so that the cylindrical battery module works at the best temperature interval. Like this, the cylinder battery module is by CCS subassembly, electric core subassembly and heat exchange assemblies integration together, can simplify group's technology and reduce the processing cost effectively, has solved the lower problem of the degree of integration of battery module among the prior art.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. The utility model provides a cylinder battery module which characterized in that includes:

a first bracket (80);

the CCS assembly (90) and the first support (80) form a mounting cavity in a surrounding mode, the CCS assembly (90) comprises an FPC board (91), a bus bar (92) and a second support (93), the FPC board (91) is connected with a sampling tab (60) of the bus bar (92), and the bus bar (92) is connected with the second support (93);

an electrical core assembly (100) disposed within the mounting cavity, the electrical core assembly (100) comprising a plurality of sets of cylindrical electrical cores, the CCS assembly (90) being mounted on a positive side of the electrical core assembly (100);

the heat exchange assembly (110) is arranged in the mounting cavity, and the heat exchange assembly (110) comprises a plurality of heat exchange plates (1101) arranged at intervals; the plurality of heat exchange plates (1101) are arranged corresponding to the plurality of groups of cylindrical battery cells, and each heat exchange plate (1101) is in contact with at least one group of corresponding cylindrical battery cells so as to be used for cooling or heating the at least one group of cylindrical battery cells.

2. The cylindrical battery module according to claim 1, wherein each group of cylindrical cells comprises a plurality of sub-cylindrical cells (20), and the plurality of sub-cylindrical cells (20) are arranged at intervals along a first preset direction and/or a second preset direction; the heat exchange plates (1101) are arranged at intervals along a first preset direction or a second preset direction; wherein, the first preset direction and the second preset direction are arranged in an included angle.

3. The cylindrical battery module according to claim 1, wherein each heat exchange plate (1101) extends into two adjacent groups of cylindrical cells to contact the outer peripheral surfaces of the sub-cylindrical cells (20) of at least one group of cylindrical cells.

4. The cylindrical battery module according to claim 1, wherein each heat exchange plate (1101) comprises a plurality of arc-shaped plate segments (1111), the plurality of arc-shaped plate segments (1111) are arranged at intervals along the extending direction of the heat exchange plate (1101), and each arc-shaped plate segment (1111) is adapted to at least part of the outer peripheral surface of the corresponding sub-cylindrical battery cell (20).

5. The cylindrical battery module according to claim 1, wherein each heat exchange plate (1101) is bonded with at least one corresponding cylindrical battery cell by a heat conducting adhesive.

6. The cylindrical battery module according to claim 2, wherein the first bracket (80) has a first through hole (81) and a plurality of mounting recesses (82), the plurality of mounting recesses (82) are arranged in one-to-one correspondence with the plurality of sub-cylindrical cells (20), and each mounting recess (82) is used for mounting the sub-cylindrical cell (20) corresponding thereto; the cylindrical battery module further comprises:

the supporting cylinder (120) is arranged on the first bracket (80) and located at the first through hole (81), the supporting cylinder (120) is provided with a second through hole (121), the second through hole (121) is communicated with the first through hole (81) through an inner cavity of the supporting cylinder (120), and the supporting cylinder (120) is used for penetrating a fastener; wherein the support cylinder (120) is made of an insulating material.

7. The cylindrical battery module according to claim 6, wherein the first bracket (80) comprises:

a holder body (83), the first through hole (81) and the mounting recess (82) being provided on the holder body (83);

the mounting ring (84) is arranged on the surface, facing the electric core assembly (100), of the support body (83), the mounting ring (84) is communicated with the first through hole (81), and the support barrel (120) extends into the mounting ring (84) and is limited and stopped by the mounting ring (84).

8. The cylindrical battery module according to claim 1, further comprising:

the insulating strips (130) extend into the two adjacent groups of cylindrical battery cells; the isolation belts (130) are arranged at intervals along a first preset direction or a second preset direction, and each isolation belt (130) is arranged to be away from each heat exchange plate (1101); wherein the insulating tape (130) is made of insulating material comprising ceramic fiber paper, mica paper and aerogel.

9. The cylindrical battery module according to claim 6, further comprising:

an insulating layer (140) covering a side of the CCS assembly (90) remote from the core assembly (100), the insulating layer (140) being made of an insulating material;

glue film (150), set up and be in first support (80) are kept away from one side of electric core subassembly (100) for with cylinder battery module bonds in the box.

10. The cylindrical battery module according to claim 9, wherein the insulating layer (140) has a third through hole (141), the adhesive layer (150) has a fourth through hole (151), the third through hole (141) is communicated with the second through hole (121), the fourth through hole (151) is communicated with the first through hole (81), and the third through hole (141) and the fourth through hole (151) are used for the fastener to pass through.

11. The cylindrical battery module according to claim 1, wherein the bus bar (92) comprises:

the busbar body (11) comprises a first row body (111) and a second row body (112), the first row body (111) is electrically connected with a positive electrode (21) of one sub-cylindrical battery cell (20), the second row body (112) is electrically connected with a negative electrode (22) of the other sub-cylindrical battery cell (20), and the two sub-cylindrical battery cells (20) are adjacently arranged along a first preset direction; the bus bar bodies (11) are multiple, and the bus bar bodies (11) are arranged at intervals along a second preset direction;

a plurality of connecting portions (12), each connecting portion (12) connecting two adjacent bus bar bodies (11);

wherein the width m of the first row body (111) and the width n of the connecting part (12) satisfy the following relation: m is more than or equal to 3n and less than or equal to 12 n.

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