CN219873783U - Cylindrical cell battery module and electric vehicle - Google Patents

Abstract

The embodiment of the utility model provides a cylindrical cell battery module and an electric vehicle, and relates to the field of battery modules. The cylindrical cell battery module comprises a module cover plate, a module bottom plate and a cylindrical cell. The module cover plate is provided with a plurality of first circular electric core holes and a plurality of welding holes, and the welding holes are communicated with the first circular electric core holes in a one-to-one correspondence manner; a plurality of second round cell holes are formed in the module base plate; the plurality of cylindrical electric cores are positioned between the module cover plate and the module bottom plate, and correspond to the plurality of first circular electric core holes and the plurality of second circular electric core holes one by one; one end of any one cylindrical cell is fixed in a corresponding second circular cell hole through heat conducting glue, and the other end of the cylindrical cell is connected with the module cover plate through structural glue smeared in the corresponding first circular cell hole; the welding holes are used for exposing the lugs of the corresponding cylindrical battery cells. The module can be replaced and disassembled to recover the cylindrical battery cell, thereby realizing the maintenance of the battery module.

Description

Cylindrical cell battery module and electric vehicle

Technical Field

The utility model relates to the field of battery modules, in particular to a cylindrical cell battery module and an electric vehicle.

Background

The conventional cylindrical battery cell module-free scheme is that structural adhesive is coated in the shell to bond the battery cell and the shell together; some large cylindrical battery cell schemes are that the battery cell is fixed by a structural member, then glue is injected into a cavity of the structural member to fill all gaps, and the two schemes have the common problem of inconvenient disassembly and maintenance.

Disclosure of Invention

The utility model provides a cylindrical battery cell battery module and an electric vehicle, which can disassemble a battery cell with a problem, and can recover the battery module after replacement, so that the maintenance of the battery module is realized.

Embodiments of the utility model may be implemented as follows:

in a first aspect, embodiments of the present utility model provide a cylindrical battery cell module, including:

the module cover plate is provided with a plurality of first round electric core holes and a plurality of welding holes, and the welding holes are communicated with the first round electric core holes in a one-to-one correspondence manner;

the module bottom plate is provided with a plurality of second round cell holes;

the plurality of cylindrical electric cores are positioned between the module cover plate and the module bottom plate, and the plurality of cylindrical electric cores correspond to the plurality of first round electric core holes and the plurality of second round electric core holes one by one;

one end of any one cylindrical battery cell is fixed in the corresponding second round battery cell hole through heat conducting glue, and the other end of the cylindrical battery cell is connected with the module cover plate through structural glue smeared in the corresponding first round battery cell hole; the welding holes are used for exposing the corresponding lugs of the cylindrical battery cells.

In an alternative embodiment, the cylindrical battery cell module further includes a busbar, the busbar is mounted on the module cover plate, and the busbar is welded with the tabs of the plurality of cylindrical battery cells through the welding hole.

In an optional implementation manner, a sink groove is formed in one side, away from the plurality of cylindrical battery cells, of the module cover plate, and the busbar is fixedly embedded in the sink groove. In an alternative embodiment, a sink groove is formed in a side, away from the plurality of cylindrical battery cells, of the module cover plate, and the busbar is embedded in the sink groove.

In an optional embodiment, a plurality of structural members distributed in an array are arranged on the module base plate, a plurality of structural members are arranged at intervals, and at least part of the second round electric core holes are formed by surrounding four adjacent structural members.

In an alternative embodiment, the peripheral wall of the structural member comprises a first large arc section, a second large arc section, a first small arc section and a second small arc section which are sequentially arranged;

the first large arc section is used for defining a second circular cell hole with other adjacent three structural members on the corresponding side of the structural member;

the second large arc section is used for defining a second circular electric core hole with other adjacent three structural members on the corresponding side of the structural member;

the first small arc section is used for defining a second circular cell hole with other adjacent three structural members on the corresponding side of the structural member;

the second small arc section is used for defining a second circular cell hole together with other adjacent three structural members on the corresponding side of the structural member.

In an alternative embodiment, a first end face is further connected between the first large arc section and the first small arc section; a second end face is also connected between the second large arc section and the first small arc section; a third end face is also connected between the second large arc section and the second small arc section; and a fourth end face is also connected between the first large arc section and the second small arc section.

In an alternative embodiment, the side of the edge of the module bottom plate facing the structural member is in a circular arc shape, and the circular arc shape is used for forming part of the second circular cell hole together with two adjacent structural members of the module bottom plate.

In an alternative embodiment, the welding hole is square.

In an alternative embodiment, the top of the cylindrical battery cell is provided with an explosion-proof valve; and an electric core explosion-proof valve opening hole is formed in the module cover plate, and the position of the electric core explosion-proof valve opening hole corresponds to the explosion-proof valve.

In an alternative embodiment, the cell explosion-proof valve opening hole is waist-shaped.

In a second aspect, an embodiment of the present utility model further provides an electric vehicle, including the cylindrical battery cell module according to any one of the foregoing embodiments.

The cylindrical battery cell module and the electric vehicle provided by the embodiment of the utility model have the beneficial effects that:

the cylindrical cell battery module comprises a module cover plate, a module bottom plate and a cylindrical cell. The module cover plate is provided with a plurality of first circular electric core holes and a plurality of welding holes, and the welding holes are communicated with the first circular electric core holes in a one-to-one correspondence manner; a plurality of second round cell holes are formed in the module base plate; the plurality of cylindrical electric cores are positioned between the module cover plate and the module bottom plate, and the plurality of cylindrical electric cores correspond to the plurality of first round electric core holes and the plurality of second round electric core holes one by one; one end of any one cylindrical battery cell is fixed in a corresponding second round battery cell hole through heat conducting glue, and the other end of the cylindrical battery cell is connected with the module cover plate through structural glue smeared in the corresponding first round battery cell hole; the welding holes are used for exposing the corresponding lugs of the cylindrical battery cells. The welding hole can only expose the lug of the cylindrical battery cell, only welds the part, and the module cover plate and the module bottom plate are connected with the cylindrical battery cell by adopting the method, so that the module cover plate is convenient to cut off when the problem battery cell is found, and the module cover plate and the module bottom plate are separated from the cylindrical battery cell. When finding the cylinder electric core that has the problem, be more convenient for change and dismantle the cylinder electric core, and can resume cylinder electric core battery module after changing, realize battery module's maintenance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an electric vehicle according to an embodiment of the present utility model;

fig. 2 is an overall schematic diagram of a cylindrical battery cell module provided in an embodiment of the present utility model;

fig. 3 is an exploded view of a cylindrical battery cell module according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a first view of a module cover plate according to an embodiment of the utility model;

FIG. 5 is a partially enlarged schematic view of a first view of a module cover plate according to an embodiment of the utility model;

FIG. 6 is a schematic diagram of a second view of a module cover plate according to an embodiment of the utility model;

fig. 7 is a schematic diagram of a module chassis according to an embodiment of the present utility model.

Icon: 1000-a cylindrical cell battery module; 2000-car body; 100-module cover plate; 110-a first circular cell hole; 120-welding holes; 130-a sink; 140-an explosion-proof valve opening hole of the battery cell; 200-module bottom plate; 210-a second circular cell hole; 220-structural member; 221-a first large arc segment; 222-a second large arc segment; 223-a first small arc segment; 224-a second small arc segment; 225-a first end face; 226-a second end face; 227—a third end face; 228-a fourth end face; 300-a cylindrical cell; 310-explosion-proof valve; 320-tab; 400-bus.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

It should be noted that the features of the embodiments of the present utility model may be combined with each other without conflict.

The conventional cylindrical battery cell module-free scheme is that structural adhesive is coated in a shell to bond the battery cell and the shell together, and the scheme of large cylindrical battery cells is that the battery cell is fixed by a structural member, then the adhesive is injected into a cavity of the structural member to fill all gaps, and the two schemes have the common problem of inconvenient disassembly and maintenance.

Based on this, referring to fig. 1, the cylindrical battery cell module 1000 and the electric vehicle provided in the embodiment of the utility model can effectively improve the above-mentioned technical problems.

Fig. 1 is a schematic structural diagram of an electric vehicle according to an embodiment of the present utility model; fig. 2 is an overall schematic diagram of a battery module provided in an embodiment of the present utility model, as shown in fig. 1 and 2, the electric vehicle includes a vehicle body 2000 and a cylindrical battery cell module 1000, the cylindrical battery cell module 1000 is disposed in the vehicle body 2000, and the cylindrical battery cell module 1000 provides electric energy for the vehicle body 2000, so as to realize various functions of the vehicle body 2000.

The structure of the cylindrical battery cell module 1000 will be described in detail below.

Referring to fig. 2 and 3, fig. 3 is an exploded view of fig. 2, and the cylindrical battery cell module 1000 according to the present embodiment includes a module cover plate 100, a module bottom plate 200, a cylindrical battery cell 300 and a bus bar 400. The cylindrical battery cell 300 is installed between the module cover plate 100 and the module bottom plate 200, the bus bar 400 is fixed on the module cover plate 100, and the bus bar 400 and the cylindrical battery cell 300 are welded to realize serial-parallel connection of the lugs 320 of the cylindrical battery cell 300.

The specific structure of the cylindrical battery cell module 1000 will be described in detail below.

Referring to fig. 3, in order to install the fixed cylindrical battery cell 300, a second circular battery cell hole 210 is formed in the module base plate 200, and a heat-conducting adhesive is applied in the second circular battery cell hole 210 of the module base plate 200, and the cylindrical battery cell 300 is adhered in the second circular battery cell hole 210. The heat-conducting adhesive has good heat conduction and electrical insulation properties, and good adhesion, can well fill gaps between contact surfaces to transfer heat, can well fix the cylindrical battery cell 300 on the module base plate 200, can play an insulating role, can also play a good heat conduction effect, and is convenient for leading out heat generated during the operation of the cylindrical battery cell 300 to cooling components such as a liquid cooling plate. The common heat-conducting glue is heat-conducting silica gel, epoxy resin AB glue, polyurethane glue and the like, and the heat-conducting silica gel is adopted in the embodiment, so that the production cost can be reduced.

In order to achieve better insulation effect and more convenient disassembly of the cylindrical battery cell 300, in this embodiment, the battery cell blue film is wrapped on the outer side of the cylindrical battery cell 300, and only the tab 320 part is not wrapped on the battery cell blue film. When the cylindrical battery cell 300 is adhered to the module cover plate 100 and the module bottom plate 200, part of the cylindrical battery cell 300 is adhered through the battery cell blue film, so that the cylindrical battery cell 300 is more easily separated from the module cover plate 100 and the module bottom plate 200 when the cylindrical battery cell 300 is disassembled. The cell blue film is an insulating material, and can separate the cells, so that the influence of various faults on other cells of a single cell is blocked, and the damage is prevented. The cell blue film has the function of insulation protection and also has the waterproof effect.

With continued reference to fig. 3, in order to ensure the safety of the cylindrical battery cell module 1000, an explosion-proof valve 310 is disposed at the top of the cylindrical battery cell 300, so that the cylindrical battery cell 300 can be timely destroyed when the pressure is too high, and the electrolyte is sprayed out from the opening to release the pressure inside the cylindrical battery cell 300, thereby preventing the explosion of the cylindrical battery cell 300 in thermal runaway and further causing a series of safety problems.

With continued reference to fig. 3, in order to ensure stability and reliability of the conductive circuit, the cylindrical battery cell module 1000 in this embodiment further includes a bus bar 400, where the bus bar 400 is mounted on the module cover 100. The bus bar 400 is generally composed of a conductive plate, on which a plurality of shorting bars are formed for connecting the positive and negative poles of the battery and other components of the cylindrical battery cell module 1000 through connectors, and the like. The bus bar 400 has high conductivity, high strength and high stability, and can make the electric energy flow in the cylindrical cell battery module 1000 more uniform and stable, thereby improving the working efficiency and the service life of the cylindrical cell battery module 1000.

Referring to fig. 4 and 5, fig. 4 is a schematic view of a first view of a module cover 100 according to an embodiment of the utility model, and fig. 5 is a partially enlarged schematic view of fig. 4. In order to connect and fix the cylindrical battery cells 300 with the module cover plate 100, in this embodiment, the module cover plate 100 is provided with a plurality of first circular battery cells holes 110, the first circular battery cells 110 are blind holes, the plurality of cylindrical battery cells 300 are located between the module cover plate 100 and the module bottom plate 200, and the plurality of cylindrical battery cells 300 are in one-to-one correspondence with the plurality of first circular battery cells 110 and the plurality of second circular battery cells 210.

The first circular cell hole 110 is coated with structural adhesive, and then the module cover plate 100 is buckled on the cylindrical cell 300, so that the cylindrical cell 300 and the module cover plate 100 are connected and fixed. The connection between the module cover plate 100 and the cylindrical battery cell 300 is realized by adopting the method, so that the module cover plate 100 is convenient to cut off when a problem battery cell is found, and the module cover plate 100 is separated from the cylindrical battery cell 300. In order to cut out the module cover plate 100 more conveniently, the module cover plate 100 in this embodiment is made of plastic material, however, the utility model is not limited thereto, and other materials which are convenient for cutting out can be used.

Referring to fig. 4, in conjunction with fig. 5, in order to facilitate welding between the cylindrical battery cells 300 and the bus bars 400, in this embodiment, a plurality of welding holes 120 are formed in the module cover plate 100, the welding holes 120 are through holes, the plurality of welding holes 120 are correspondingly communicated with the plurality of first circular battery cells 110 one by one, and the bus bars 400 are welded with the tabs 320 of the plurality of cylindrical battery cells 300 through the welding holes 120 throughout the module cover plate 100. The welding holes 120 are square, and the welding holes 120 only expose the tabs 320 of the corresponding cylindrical battery cell 300, so that the bus bar 400 is welded with the cylindrical battery cell 300 in a small range, and the bus bar 400 is convenient to detach when a defective battery cell is found.

With continued reference to fig. 4, and with reference to fig. 5, in order to timely destroy the cylindrical battery cell 300 when the pressure is too high, the electrolyte is sprayed from the explosion-proof valve 310 to release the pressure inside the cylindrical battery cell 300, in this embodiment, the module cover plate 100 is provided with a battery cell explosion-proof valve opening hole 140, and the battery cell explosion-proof valve opening hole 140 is a through hole and corresponds to the position of the explosion-proof valve 310 opened on the top of the cylindrical battery cell 300. When the pressure of the cylindrical battery cell 300 is too high, electrolyte can be sprayed out from the battery cell explosion-proof valve opening hole 140 to release the internal pressure, so that the cylindrical battery cell 300 is prevented from explosion, and the whole cylindrical battery cell battery module 1000 is damaged.

Because the cylindrical battery cell 300 may have an angle deflection during the production process, in order to prevent the battery cell explosion-proof valve opening hole 140 from not completely corresponding to the possible positions of the explosion-proof valve 310, the battery cell explosion-proof valve opening hole 140 is designed to be waist-shaped in the embodiment, so that the fault tolerance of the deflection angle of the cylindrical battery cell 300 during the production process can be improved.

Referring to fig. 6, fig. 6 is a schematic diagram of another view angle of the module cover 100 according to the embodiment of the utility model, where the bus bar 400 is mounted on the module cover 100, and in this embodiment, specifically, a side of the module cover 100 away from the plurality of cylindrical cells 300 is provided with a bus groove 130, and the bus bar 400 is fixedly embedded in the bus groove 130. The shape of the sink 130 is the same as the shape of the installed bus bar 400, and the bus bar 400 is connected with the sink 130 by pins, thereby realizing the fixed installation of the bus bar 400 on the module cover plate 100.

Referring to fig. 7, fig. 7 shows a module bottom plate 200, in this embodiment, a plurality of structural members 220 are distributed on the module bottom plate 200 in an array manner, the plurality of structural members 220 are arranged at intervals, and at least a portion of the second circular cell holes 210 are formed by surrounding four adjacent structural members 220. The structural member 220 is bow-tie-shaped, and the peripheral wall of the structural member 220 comprises a first large arc section 221, a second large arc section 222, a first small arc section 223 and a second small arc section 224 which are sequentially arranged.

The first major arc segment 221 is configured to define a second circular cell hole 210 with other adjacent three structural members 220 of the structural member 220 adjacent to the side of the first major arc segment 221; the second large arc segment 222 is configured to define a second circular cell hole 210 with other adjacent three structural members 220 of the structural member 220 adjacent to the second large arc segment 222; the first small arc section 223 is configured to define a second circular cell hole 210 with other adjacent three structural members 220 on the side of the structural member 220 adjacent to the first small arc section 223; the second small arc segment 224 is configured to define a second circular cell hole 210 with other adjacent three structural members 220 of the structural members 220 adjacent to the side of the second small arc segment 224.

The second circular cell hole 210 enclosed in this way is not a closed hole, a gap is formed in the middle, and when the heat-conducting glue is smeared in the second circular cell hole 210, the heat-conducting glue cannot be accumulated, so that only the bottom of the cylindrical cell 300 and the position contacted with the large and small circular arc sections of the structural member 220 are adhered to the module base plate 200, and when a problem cell is taken out, the cylindrical cell 300 is relatively easy to separate from the bottom of the module by rotating along the circumferential direction, and the problem cell is convenient to take out and replace.

With continued reference to fig. 7, in order not to damage the cylindrical battery 300 when the cylindrical battery 300 is mounted, the large and small arc segments of the structural member 220 are connected by smooth end surfaces. A first end surface 225 is also connected between the first large arc section 221 and the first small arc section 223; a second end face 226 is also connected between the second large arc section 222 and the first small arc section 223; a third end face 227 is also connected between the second large arc segment 222 and the second small arc segment 224; a fourth end face 228 is also connected between the first major arc segment 221 and the second minor arc segment 224.

The working principle of the cylindrical battery cell module 1000 according to the present embodiment is as follows:

the cylindrical battery cell module 1000 comprises a module cover plate 100, wherein the module cover plate 100 is provided with a first circular battery cell hole 110; the module base plate 200 is provided with a second round cell hole 210; the cylindrical battery cells 300, the cylindrical battery cells 300 are located between the module cover plate 100 and the module bottom plate 200, and the plurality of cylindrical battery cells 300 are in one-to-one correspondence with the plurality of first circular battery cells holes 110 and the plurality of second circular battery cells holes 210. The second round cell hole 210 of the module base plate 200 is coated with heat conducting glue, and the cylindrical cell 300 is adhered in the second round cell hole 210, so that the connection and fixation of the cylindrical cell 300 and the module base plate 200 are realized; the first circular cell hole 110 is coated with structural adhesive, and then the module cover plate 100 is buckled on the cylindrical cell 300, so that the cylindrical cell 300 and the module cover plate 100 are connected and fixed. The module cover plate 100 is far away from one side of the plurality of cylindrical battery cells 300 and is provided with a sink groove 130, a busbar 400 is embedded in the sink groove 130, the module cover plate 100 is also provided with a plurality of welding holes 120, the plurality of welding holes 120 are communicated with the plurality of first round battery cells 110 in a one-to-one correspondence manner, the welding holes 120 can be only formed in the lug 320 of the cylindrical battery cells 300, and the busbar 400 and the cylindrical battery cells 300 are welded through the welding holes 120.

After the problematic cylindrical battery cell 300 is found, firstly, removing the busbar 400 above the problematic cylindrical battery cell 300, then cutting off the module cover plate 100 along the circumference of the ring of the problematic cylindrical battery cell 300 to one side, exposing the top end surface of the cylindrical battery cell 300, then coating structural adhesive on the top of the cylindrical battery cell 300, externally introducing a disassembly tool, fixedly connecting the cylindrical battery cell 300 with the disassembly tool through the structural adhesive, rotating the cylindrical battery cell 300 along the circumferential direction after the structural adhesive is completely solidified, and then vertically extracting the cylindrical battery cell 300.

At this time, the cell blue film outside the pulled-out cylindrical cell 300 falls off inside the module base plate 200, after the problematic cylindrical cell 300 is taken out, the cell blue film inside the module base plate 200 is removed, then a new cylindrical cell 300 which is wrapped with the cell blue film again is put in, then the cut-out module cover plate 100 is put back, and the structural adhesive is knotted around the cutting seam for fixation, and finally the busbar 400 is welded, thus completing the maintenance process.

In summary, the cylindrical battery cell module 1000 includes the module cover 100, the module bottom plate 200, and the cylindrical battery cell 300. The module cover plate 100 is provided with a plurality of first circular electric core holes 110 and a plurality of welding holes 120, and the plurality of welding holes 120 are correspondingly communicated with the plurality of first circular electric core holes 110 one by one; the module base plate 200 is provided with a plurality of second round cell holes 210; the plurality of cylindrical battery cells 300 are located between the module cover plate 100 and the module bottom plate 200, and the plurality of cylindrical battery cells 300 are in one-to-one correspondence with the plurality of first circular battery cell holes 110 and the plurality of second circular battery cell holes 210; wherein, for any one cylindrical cell 300, one end of the cylindrical cell 300 is fixed in the corresponding second circular cell hole 210 through heat conducting glue, and the other end of the cylindrical cell 300 is connected with the module cover plate 100 through structural glue smeared in the corresponding first circular cell hole 110; the soldering holes 120 are used for exposing the tabs 320 of the corresponding cylindrical battery cells 300.

The welding hole 120 only exposes the tab 320 of the cylindrical battery cell 300, and the bus bar 400 is welded with only the exposed portion, so that the connection of the module cover plate 100 and the module bottom plate 200 with the cylindrical battery cell 300 is realized, the module cover plate 100 is conveniently cut off when a defective battery cell is found, and the module cover plate 100 and the module bottom plate 200 are separated from the cylindrical battery cell 300. When the cylinder cell 300 with the problem is found, the cylinder cell 300 is more convenient to replace and detach, and the cylinder cell battery module 1000 can be restored after the replacement, so that the maintenance of the battery module is realized.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model.

Claims (10)

1. A cylindrical cell battery module, comprising:

the module cover plate (100), a plurality of first circular electric core holes (110) and a plurality of welding holes (120) are formed in the module cover plate (100), and the plurality of welding holes (120) are communicated with the plurality of first circular electric core holes (110) in a one-to-one correspondence manner;

a module base plate (200), wherein a plurality of second round electric core holes (210) are formed in the module base plate (200); and

the plurality of cylindrical battery cells (300), the plurality of cylindrical battery cells (300) are positioned between the module cover plate (100) and the module base plate (200), and the plurality of cylindrical battery cells (300) are in one-to-one correspondence with the plurality of first circular battery cell holes (110) and the plurality of second circular battery cell holes (210);

one end of the cylindrical battery cell (300) is fixed in the corresponding second round battery cell hole (210) through heat conducting glue, and the other end of the cylindrical battery cell (300) is connected with the module cover plate (100) through structural glue smeared in the corresponding first round battery cell hole (110); the welding holes (120) are used for exposing the corresponding lugs (320) of the cylindrical battery cells (300).

2. The cylindrical cell battery module according to claim 1, wherein the cylindrical cell battery module (1000) further comprises a bus bar (400), the bus bar (400) is mounted on the module cover plate (100), and the bus bar (400) is welded with the tabs (320) of the plurality of cylindrical cells (300) through the welding holes (120).

3. The cylindrical cell battery module according to claim 2, wherein a sink groove (130) is formed on one side of the module cover plate (100) away from the plurality of cylindrical cells (300), and the bus bar (400) is fixedly embedded in the sink groove (130).

4. The cylindrical battery cell module according to claim 1, wherein a plurality of structural members (220) are distributed on the module base plate (200) in an array manner, the plurality of structural members (220) are arranged at intervals, and at least part of the second circular battery cell holes (210) are formed by surrounding four adjacent structural members (220).

5. The cylindrical cell battery module according to claim 4, wherein the peripheral wall of the structural member (220) includes a first large arc section (221), a second large arc section (222), a first small arc section (223) and a second small arc section (224) which are sequentially arranged;

the first large arc section (221) is used for defining a second circular cell hole (210) together with other adjacent three structural components (220) on the corresponding side of the structural component (220);

the second large arc section (222) is used for defining one second circular cell hole (210) together with other adjacent three structural members (220) on the corresponding side of the structural member (220);

the first small arc section (223) is used for defining one second circular cell hole (210) together with other adjacent three structural components (220) on the corresponding side of the structural component (220);

the second small arc section (224) is configured to define one second circular cell hole (210) together with other adjacent three structural members (220) on the corresponding side of the structural member (220).

6. The cylindrical cell battery module according to claim 5, wherein a first end face (225) is further connected between the first large arc section (221) and the first small arc section (223); a second end face (226) is also connected between the second large arc section (222) and the first small arc section (223); a third end face (227) is also connected between the second large arc section (222) and the second small arc section (224); a fourth end face (228) is further connected between the first large arc section (221) and the second small arc section (224).

7. The cylindrical cell battery module according to claim 5, wherein a side of the module bottom plate (200) facing the structural member (220) is arc-shaped for forming part of the second circular cell hole (210) together with two structural members (220) adjacent to the corresponding side of the arc shape.

8. The cylindrical cell battery module according to claim 1, wherein the welding hole (120) is square.

9. The cylindrical cell battery module according to claim 1, wherein an explosion-proof valve (310) is provided at the top of the cylindrical cell (300); and an electric core explosion-proof valve opening hole (140) is formed in the module cover plate (100), and the position of the electric core explosion-proof valve opening hole (140) corresponds to the explosion-proof valve (310).

10. An electric vehicle characterized by comprising a cylindrical cell battery module (1000) according to any one of claims 1-9.