CN217691345U - Cold drawing, battery box structure and battery package - Google Patents

Abstract

An embodiment of the utility model provides a cold drawing, battery box structure and battery package belong to secondary battery technical field. The cold plate comprises a first layer plate, a second layer plate and a third layer plate which are sequentially stacked. The battery comprises a battery core, a first laminate, a second laminate and a third laminate, wherein the battery core is provided with a battery core, the first laminate, the second laminate and the third laminate are integrally formed, a flow channel is formed between the first laminate and the second laminate, the flow channel is used for flowing of a heat exchange medium to exchange heat with the battery core, a cavity is formed between the second laminate and the third laminate, and the third laminate is used for protecting the second laminate. The cold plate can make the assembly of battery package simpler when realizing battery package thermal management, and occupation space reduces and intensity improves.

Description

Cold drawing, battery box structure and battery package

Technical Field

The utility model relates to a secondary battery is field in time, particularly, relates to a cold drawing, battery box structure and battery package.

Background

Among the prior art, the bottom assembly of battery box sets up the cold drawing, supports bubble cotton and end backplate, lets electric core bear on the cold drawing in order to carry out the thermal management of electric core in the battery box, lets end backplate pass through the below of supporting the cotton setting of bubble at the cold drawing to cold drawing safety protection. However, the assembly process is complex, and the method occupies a large installation space and has low strength.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cold drawing, battery box structure and battery package, it can be when realizing battery package thermal management, can let the assembly of battery package simpler, and occupation space reduces and intensity improves.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides a cold drawing for the thermal management of electric core, the cold drawing is including first plywood, second plywood and the third plywood of range upon range of setting in proper order, first plywood the second plywood with third plywood integrated into one piece, just first plywood with be formed with the runner between the second plywood, the runner is used for heat transfer medium to flow, with the electric core heat transfer, the second plywood with be formed with the cavity between the third plywood, the third plywood is right the second plywood is protected.

In an alternative embodiment, the cold plate further comprises a first support and a second support;

the number of the first supporting parts comprises two, the two first supporting parts are respectively arranged on two opposite sides between the first laminate and the second laminate so as to enable the first laminate and the second laminate to be arranged in parallel, and the first laminate, the first supporting parts and the second laminate surround to form the flow channel;

the number of the second supporting parts comprises two, the two second supporting parts are respectively arranged on two opposite sides between the second laminate and the third laminate so as to enable the second laminate and the third laminate to be arranged in parallel, and the second laminate, the second supporting parts and the third laminate surround to form the cavity;

the first laminate, the first support portion, the second laminate, the second support portion, and the third laminate are integrally formed.

In an optional embodiment, the cold plate further includes a partition rib, the partition rib is disposed in the flow channel, an extending direction of the partition rib is the same as an extending direction of the first support portion, and the partition rib is used for enabling the flow channel to form a plurality of water flow paths.

In an alternative embodiment, the cold plate further comprises heat dissipating ribs disposed in the water flow path.

In an optional embodiment, the cold plate further includes a plurality of reinforcing ribs, and the plurality of reinforcing ribs are disposed at intervals in the cavity and are connected to the second plate and the third plate.

In an alternative embodiment, the dimension of the first layer plate in the width direction of the flow channel is smaller than the dimension of the second layer plate in the width direction of the flow channel, so that mounting grooves are formed on two sides of the first layer plate in the width direction.

In a second aspect, the present invention provides a battery box body structure, including a side plate frame and the cold plate of any one of the foregoing embodiments;

the side plate frame is arranged on one side, close to the first layer plate, of the cold plate, the cold plate and the side plate frame enclose to form an installation cavity, the installation cavity is used for containing the battery cell, and the first layer plate is used for bearing the battery cell.

In an optional embodiment, the first layer plate and/or the side plate frame is/are provided with the liquid inlet and the liquid outlet which are communicated with the flow channel;

the battery box structure further comprises a plurality of blocking blocks, wherein the blocking blocks are arranged at the end parts of the flow channels to seal the flow channels, so that the heat exchange medium flows into the flow channels from the liquid inlet and then flows out from the liquid outlet.

In an optional embodiment, the side plate frame comprises a plurality of side plates connected end to end in sequence, and the plurality of blocking blocks are integrally formed with at least one side plate.

In a third aspect, the present invention provides a battery pack comprising a cold plate according to any one of the previous embodiments; or, the battery box body structure of any one of the previous embodiments is included.

The embodiment of the utility model provides a cold drawing, battery box structure and battery package's beneficial effect includes:

this application is through range upon range of and integrated into one piece with first plywood, second plywood and third plywood in proper order to let and form the runner between first plywood and the second plywood, thereby can realize that heat transfer medium flows at the runner, in order to lower the temperature for electric core. And the cavity arranged between the second layer plate and the third layer plate can protect the second layer plate through the third layer plate and can also preserve heat at the same time. Meanwhile, the first layer plate, the second layer plate and the third layer plate are integrally formed, so that the battery pack is simpler to assemble, and the integral bearing capacity can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a battery box body provided by an embodiment of the present invention;

fig. 2 is a schematic diagram of a cold plate structure according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a battery box body structure between a first layer plate and a second layer plate according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a battery box body structure between a second layer plate and a third layer plate according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a side plate frame of a battery box body structure according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a partial explosion structure of a side plate frame of a battery box body structure according to some embodiments of the present invention.

Icon 100-cold plate; 111-a first ply; 113-a second ply; 115-third layer plate; 117-flow channel; 119-a cavity; 121-a first support; 123-a second support; 124-reinforcing ribs; 125-separating ribs; 126-a water flow path; 127-heat dissipation ribs; 128-mounting grooves; 129-a liquid inlet; 131-a liquid outlet; 133-buffer area; 300-battery box body structure; 310-side panel frame; 311-a mounting cavity; 313-a first side panel; 315-a second side panel; 317-a third side plate; 319-fourth side panel; 330-plugging block; 350-a first conduit; 351-a first main conduit; 353-a first branch conduit; 357-a second branch conduit; 370-a second conduit; 371 — a second main conduit; 373-a third branched conduit; 375-fourth branch conduit; 500-battery pack.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of the embodiments of the present invention 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 invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Referring to fig. 1, an embodiment of the present invention provides a battery pack 500. The battery pack 500 includes a battery box housing structure 300 and a plurality of battery cells (not shown) disposed within the battery box housing structure 300.

In the present embodiment, the battery case structure 300 includes the side plate frame 310 and the cold plate 100. The side panel frame 310 is fixed to the cold plate 100. The side plate frame 310 and the cold plate 100 enclose a mounting cavity 311. The cells are disposed within the mounting cavity 311 and the cells are carried on the cold plate 100.

Referring to fig. 2, in the present embodiment, the cold plate 100 includes a first plate 111, a second plate 113 and a third plate 115, which are sequentially stacked. The first, second, and third laminate sheets 111, 113, and 115 are integrally formed, and a flow channel 117 is formed between the first and second laminate sheets 111 and 113. The flow channel 117 is used for flowing a heat exchange medium to exchange heat with the battery cell. A cavity 119 is formed between the second laminate 113 and the third laminate 115. Third laminate 115 is used to protect second laminate 113.

In this embodiment, the first layer plate 111, the second layer plate 113 and the third layer plate 115 are sequentially stacked and integrally formed, so that the flow channel 117 is formed between the first layer plate 111 and the second layer plate 113, and thus the heat exchange medium can flow in the flow channel 117 to cool the battery cell. The provision of cavity 119 between second and third plies 113, 115 allows for insulation while protecting second ply 113 from third ply 115. Meanwhile, since the first laminate sheet 111, the second laminate sheet 113 and the third laminate sheet 115 are integrally formed, the assembly of the battery pack 500 is simpler, and the overall load-bearing capacity can be improved.

In the present embodiment, the cold plate 100 further includes a first support part 121 and a second support part 123. The number of the first support parts 121 includes two, and the two first support parts 121 are respectively disposed at opposite sides between the first layer plate 111 and the second layer plate 113 so that the first layer plate 111 and the second layer plate 113 are disposed in parallel. The first deck 111, the first support 121, and the second deck 113 enclose a runner 117. The number of the second supporting parts 123 includes two, and the two second supporting parts 123 are respectively disposed at opposite sides between the second laminate sheet 113 and the third laminate sheet 115 such that the second laminate sheet 113 and the third laminate sheet 115 are disposed in parallel. The second layer plate 113, the second support 123 and the third layer plate 115 enclose a cavity 119. The first layer panel 111, the first support part 121, the second layer panel 113, the second support part 123, and the third layer panel 115 are integrally formed.

In the embodiment, the first supporting part 121 and the second supporting part 123 are arranged, so that the first laminate 111, the second laminate 113 and the third laminate 115 are arranged in parallel two by two to help to bear the battery core and facilitate installation.

In the present embodiment, two first support portions 121 are provided at both sides in the width direction between the first deck 111 and the second deck 113. Two second supporting portions 123 are provided on both sides in the width direction between the second layer plate 113 and the third layer plate 115. And the arrangement direction of the first support part 121 is the same as that of the second support part 123, which is more beneficial to the integral casting or extrusion molding of the cold plate 100.

Of course, in other embodiments of the present application, the directions of the first supporting portion 121 and the second supporting portion 123 may be different, for example, the projection of the first supporting portion 121 and the second supporting portion 123 on the plane of the third layer plate 115 is perpendicular.

Referring to fig. 2 and 3, in the present embodiment, the cold plate 100 further includes a partition rib 125, the partition rib 125 is disposed in the flow channel 117, an extending direction of the partition rib 125 is the same as an extending direction of the first supporting portion 121, and the partition rib 125 is used for enabling the flow channel 117 to form a plurality of water flow paths 126.

In this embodiment, the partition ribs 125 are arranged to partition the flow channel 117 into a plurality of water flow paths 126, so that the heat exchange medium can flow better, and the thermal management of the battery cell is realized. Meanwhile, the partition ribs 125 can also form effective support between the first laminate 111 and the second laminate 113, so that the bearing capacity of the cold plate 100 can be improved, and more cells can be borne on the cold plate 100.

In the present embodiment, the arrangement direction of the partition rib 125 is parallel to the direction of the first support part 121, and the partition rib 125 is integrally formed with the first layer plate 111, the second layer plate 113, the third layer plate 115, the first support part 121, and the second support part 123.

In this embodiment, the partition ribs 125 are integrally formed with the first and second sheets 111 and 113 in the same direction as the first support 121, thereby facilitating the manufacture of the cold plate 100.

In the present embodiment, the number of the partition ribs 125 includes three, and the three partition ribs 125 are spaced apart from each other, so that the flow passage 117 forms four water flow paths 126 side by side.

Of course, in other embodiments of the present application, the number of the separating ribs 125 may also be set according to the size of the cold plate 100, and may be one, two or more. In some embodiments of the present disclosure, the partition rib 125 may also be assembled in the flow channel 117 by a separate design and then by a slot or the like. In this embodiment, the cold plate 100 further includes heat dissipating ribs 127, the heat dissipating ribs 127 are disposed in the water flow path 126, and the heat dissipating ribs 127 are disposed in parallel with the separating ribs 125.

This embodiment is through setting up heat dissipation muscle 127 to can increase heat transfer area, with the thermal management of better realization battery package 500.

In the present embodiment, three heat dissipation ribs 127 are disposed in each water flow path 126, and the three heat dissipation ribs 127 are disposed in parallel. The heat dissipation ribs 127 are integrally formed with the first layer board 111, the second layer board 113, the third layer board 115, and the like.

In this embodiment, the heat dissipation ribs 127 are connected to the first layer board 111 on one side and the second layer board 113 on the other side. Of course, in some other embodiments of the present application, the heat dissipating ribs 127 may be protruded from the first layer 111 to the water flow path 126, and not connected to the second layer 113. In the embodiment, one side of the heat dissipation path is connected to the first layer plate 111, and the other side is connected to the second layer plate 113, so that the heat exchange of the cold plate 100 can be improved, and the strength of the cold plate can be enhanced.

Of course, in other embodiments of the present application, the number of the heat dissipating ribs 127 may also be set according to the width and length of the water flow path 126, and may be one, or two or more. The shape of the heat dissipation ribs 127 may also be set to be curved.

Referring to fig. 2 and 4, in the present embodiment, the cold plate 100 further includes a plurality of ribs 124, and the plurality of ribs 124 are disposed in the cavity 119 at intervals and are connected to the second layer plate 113 and the third layer plate 115.

The reinforcing ribs 124 are arranged in the embodiment, so that the connection strength between the second layer plate 113 and the third layer plate 115 can be improved through the supporting parts, and the strength of the cold plate 100 can be improved.

In the present embodiment, the reinforcing ribs 124 are disposed in the same direction as the second supporting portion 123, so that the strength of the cold plate 100 can be improved, and the cold plate can be easily processed.

It should be noted that the number of the reinforcing ribs 124 may be determined according to the number and the weight of the load-bearing cells. When the number of the bearing cells is small, and the weight is light, a few reinforcing ribs 124 can be arranged. When the number of the bearing cells is large and the weight is large, a plurality of the bearing cells can be arranged.

Referring to fig. 2, 3 and 4, in the present embodiment, the dimension of the first layer plate 111 in the width direction of the flow channel 117 is smaller than the dimension of the second layer plate 113 in the width direction of the flow channel 117, so that the mounting grooves 128 are formed on two sides of the first layer plate 111 in the width direction. The side plate frame 310 is partially installed in the installation groove 128. The positioning of the side plate frame 310 with the cold plate 100 can be conveniently accomplished by providing the mounting groove 128.

In the present embodiment, the side plate frame 310 includes a first side plate 313, a second side plate 315, a third side plate 317, and a fourth side plate 319 which are connected end to end in sequence, the first side plate 313 and the third side plate 317 are disposed at both sides of the width direction of the flow channel 117 of the cold plate 100, and the first side plate 313 and the third side plate 317 are respectively disposed in the mounting groove 128. The second and fourth side panels 315 and 319 are disposed at both ends of the first side panel 313 and are connected with the third side panel 317 to form the side panel frame 310 into a rectangular structure. And the second side plate 315 and the fourth side plate 319 are also used for blocking both ends of the flow channel 117, so that the flow channel 117 forms a closed structure.

Of course, in other examples of the present application, the side panel frame 310 may also include a plurality of end-to-end connected side panels, for example, the number of the side panels may be six, which form a hexagonal side panel frame, and of course, may also be 8 side panels or more. It can be seen that the number of the side plates is not limited in the present embodiment, and the number of the side plates may be determined according to the shape of the battery pack 500.

In this embodiment, the first plate 111 is provided with an inlet 129 and an outlet 131 which communicate with the water flow path 126. The heat exchange medium flows into the water flow path 126 from the inlet 129, flows through the water flow path 126, and flows out from the outlet 131.

Of course, in some embodiments of the present application, the liquid inlet 129 and the liquid outlet 131 may be disposed on the side plate frame 310.

With continued reference to fig. 2 and 5, in the present embodiment, the liquid inlet 129 and the liquid outlet 131 are disposed at the same end of the first layer 111. The battery box body structure 300 further includes a plurality of blocking blocks 330, and the blocking blocks 330 are disposed at the end portions of the water flow paths 126 to block the water flow paths 126, so that the heat exchange medium flows in from the liquid inlet 129 and then flows out from the liquid outlet 131.

In this embodiment, the partition ribs 125 are flush with the first plate 111 and the second plate 113 on the side where the liquid inlet 129 and the liquid outlet 131 are disposed, and are inserted into the four flow passages 117 through the four blocks 330, respectively. One side of the middle separating rib 125, which is far away from the liquid inlet 129 and the liquid outlet 131, is flush with the end surfaces of the first layer plate 111 and the second layer plate 113, and one sides of the other two separating ribs, which are far away from the liquid inlet 129 and the liquid outlet 131, are shorter than the middle separating rib 125 to form a gap at the end part, and the two end sealing blocks are respectively arranged at two sides of the middle separating rib 125, so that the four water flow paths 126 form two circulating flow paths 117. There are two liquid inlets 129, and the two liquid inlets 129 are respectively communicated with the water flow paths 126 provided on both sides of the intermediate partition rib 125. The two liquid outlets 131 are respectively communicated with the water flow paths 126 on the two sides, so that liquid can be fed from the middle of the cold plate 100, and liquid can be discharged from the two sides, and the temperature uniformity of the battery pack 500 can be realized when the battery pack 500 dissipates heat.

In the present embodiment, both ends of the partition rib 125 provided in the middle are respectively abutted against the first side plate 313 and the third side plate 317, and the partition rib serves to partition the flow channel 117. One end of each of the two partition ribs 125 located on both sides of the middle partition rib 125 abuts against the first side plate 313, and the other end of each of the two partition ribs is not abutted against the third side plate 317, so that the two adjacent water flow paths 126 are communicated with each other, one of the two water flow paths 126 communicated with each other can be used for the inflow of the cooling medium, and the other can be used for the outflow of the cooling medium. That is, the two partition ribs 125 disposed on the two sides of the middle partition rib 125 are used to communicate two water flows, one of the two water flows forms a liquid inlet flow channel, and the other water flow forms a liquid outlet flow channel.

In this embodiment, the two ends of the heat dissipating ribs 127 are provided with buffer areas 133, and the buffer areas 133 allow the heat exchange medium flowing from the liquid inlet 129 to flow into the gaps between the heat dissipating ribs 127 after being shunted by the buffer areas 133.

It should be noted that the liquid inlet 129 and the liquid outlet 131 of the present application are only used for distinguishing features, and it is not limited that the liquid inlet 129 can only feed liquid, and the liquid outlet 131 can only discharge liquid. For example, the cold plate 100 provides the inlet port 129 for inlet fluid and the outlet port 131 for outlet fluid when cooling the battery pack 500. When the cold plate 100 heats the battery pack 500, the liquid can be fed from the liquid outlet 131, and the liquid can be discharged from the liquid inlet 129, so that the temperature uniformity management of the battery pack 500 can be improved, and the problems of heat convergence and temperature unevenness of the central position of the battery pack 500 can be avoided. Secondly, the above-mentioned circulation flow channel 117 is only an example of one usage of the cold plate 100, and in other embodiments of the present application, the flow sequence of the flow channel 117 may be changed by changing the length of the partition rib 125 and the retraction of the two ends according to the specific design of the flow channel 117.

In this embodiment, a portion of the blocking piece 330 is integrally formed with the first side panel 313, and another portion of the blocking piece 330 is integrally formed with the third side panel 317.

Referring to fig. 6, of course, in other embodiments of the present application, the end block may be separately designed and manufactured and then installed at the end of the water flow path 126 by means of assembling.

In this embodiment, the battery box case structure 300 further includes a first duct 350 and a second duct 370. The first conduit 350 communicates with the inlet port 129 and the second conduit 370 communicates with the outlet port 131.

In this embodiment, the first conduit 350 includes a first main conduit 351, a first branch conduit 353 and a second branch conduit 357, one ends of the first branch conduit 353 and the second branch conduit 357 are respectively communicated with the two liquid inlet ports 129, and the other ends of the second branch conduit 357 and the first branch conduit 353 are respectively connected with the first main conduit 351. The second pipeline 370 includes a second main pipeline 371, a third branch pipeline 373 and a fourth branch pipeline 375, one ends of the third branch pipeline 373 and the fourth branch pipeline 375 are respectively communicated with the two liquid outlets 131, and the other ends of the third branch pipeline 373 and the fourth branch pipeline 375 are connected with the second main pipeline 371.

The embodiment of the utility model provides a cold drawing 100, battery box structure 300 and battery package 500's theory of operation and beneficial effect include:

this application is through range upon range of and integrated into one piece with first plywood 111, second plywood 113 and third plywood 115 in proper order to let and form runner 117 between first plywood 111 and the second plywood 113, thereby can realize that heat transfer medium flows at runner 117, in order to lower the temperature for electric core. The provision of cavity 119 between second layer sheet 113 and third layer sheet 115 allows for insulation while protecting second layer sheet 113 from third layer sheet 115. Meanwhile, since the first laminate sheet 111, the second laminate sheet 113 and the third laminate sheet 115 are integrally formed, the assembly of the battery pack 500 is simpler, and the overall load-bearing capacity can be improved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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 (10)

1. The utility model provides a cold drawing for the thermal management of electric core, its characterized in that, the cold drawing is including first plywood, second plywood and the third plywood that stacks gradually the setting, first plywood, the second plywood with third plywood integrated into one piece, just first plywood with be formed with the runner between the second plywood, the runner is used for heat transfer medium to flow, with the electricity core heat transfer, the second plywood with be formed with the cavity between the third plywood, the third plywood is used for right the second plywood protects.

2. The cold plate of claim 1, further comprising a first support and a second support;

the number of the first supporting parts comprises two, the two first supporting parts are respectively arranged on two opposite sides between the first laminate and the second laminate so as to enable the first laminate and the second laminate to be arranged in parallel, and the first laminate, the first supporting parts and the second laminate surround to form the flow channel;

the number of the second supporting parts comprises two, the two second supporting parts are respectively arranged on two opposite sides between the second laminate and the third laminate so as to enable the second laminate and the third laminate to be arranged in parallel, and the second laminate, the second supporting parts and the third laminate surround to form the cavity;

the first laminate, the first support portion, the second laminate, the second support portion, and the third laminate are integrally formed.

3. The cold plate as claimed in claim 2, further comprising a partition rib disposed within the flow passage and extending in the same direction as the first support portion, the partition rib being configured to allow the flow passage to form a plurality of water flow paths.

4. The cold plate of claim 3, further comprising heat dissipating ribs disposed in the water flow path.

5. The cold plate of any one of claims 2 to 4, further comprising a plurality of reinforcing ribs spaced within the cavity and each connected to the second and third plates.

6. The cold plate of any one of claims 2 to 4, wherein the dimension of the first plate in the width direction of the flow passage is smaller than the dimension of the second plate in the width direction of the flow passage, such that the first plate forms mounting grooves on both sides in the width direction of the flow passage.

7. A battery box body structure, characterized by comprising a side plate frame and the cold plate of any one of claims 1 to 6;

the curb plate frame sets up the cold drawing is close to one side of first plywood, the cold drawing with the curb plate frame encloses to close and forms the installation cavity, the installation cavity is used for holding electric core, first plywood is used for bearing electric core.

8. The battery box body structure as claimed in claim 7, wherein the first laminate and/or the side plate frame is provided with a liquid inlet and a liquid outlet communicated with the flow channel;

the battery box structure further comprises a plurality of blocking blocks, wherein the blocking blocks are arranged at the end parts of the flow channels and used for sealing the flow channels, so that the heat exchange medium flows into the flow channels from the liquid inlet and then flows out from the liquid outlet.

9. The battery box body structure of claim 8, wherein the side plate frame comprises a plurality of side plates connected end to end in sequence, and a plurality of the blocking blocks are integrally formed with at least one of the side plates.

10. A battery pack characterized by comprising the battery case body structure of any one of claims 7 to 9.

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