CN220065912U - Box, liquid cooling plate assembly and battery pack - Google Patents

Abstract

The utility model relates to the technical field of power batteries, in particular to a box body, a liquid cooling plate assembly and a battery pack, wherein the box body comprises a box body bottom plate, and the box body bottom plate is respectively provided with two sinking grooves for assembling a collecting pipe; the liquid cooling plate assembly comprises the box body, and the collecting pipe is arranged on the sinking grooves at two ends of the bottom plate of the box body, so that the height difference between the collecting pipe and the harmonica pipe is reduced, the distance between the collecting pipe and the bottom plate of the box body is increased, and the problem that the harmonica pipe in the prior art can be inserted into a collecting pipe cavity only by a warp-up bending process is solved; the battery pack comprises the liquid cooling plate assembly, the height of the bottom space of the box bottom is reduced on the premise that the design of the liquid cooling plate is not changed, and the volume utilization rate of a battery system is improved.

Description

Box, liquid cooling plate assembly and battery pack

Technical Field

The utility model relates to the technical field of power batteries, in particular to a box body, a liquid cooling plate assembly and a battery pack.

Background

The power of the new energy electric automobile mainly comes from a battery system, the charging and discharging and the safety performance of the battery system directly influence the power performance of the electric automobile, and the battery thermal management system at present mainly takes a liquid cooling mode with higher heat transfer efficiency and more uniform temperature control as a main part. The existing harmonica pipe type liquid cooling system has strict requirements on the inner module of the box body and the space at the bottom of the box, and the height of the space at the bottom of the box is required to meet the requirements of the thickness of supporting foam, the thickness of the harmonica pipe and the thickness of a heat conducting medium.

As shown in FIG. 1, the prior art harmonica-type liquid cooling system mainly comprises harmonica tubes and a collecting pipe, and because the harmonica tubes and the bottom of the collecting pipe have a certain height difference, the harmonica tubes can be inserted into the collecting pipe cavity only by a warp upward bending process, which can lead to the increase of the dimension of the liquid cooling plate in the length direction, occupy the space in the length direction of a battery pack and are not beneficial to the improvement of the volume energy density of the battery system.

Disclosure of Invention

The utility model aims at: aiming at the technical problem that a harmonica pipe in the prior art can be inserted into a collecting pipe cavity only by a warp-up bending process, the box body is provided, and meanwhile, the liquid cooling plate assembly and the battery pack are also provided.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a box, includes the box bottom plate, be equipped with at least one heavy groove on the box bottom plate, heavy groove is used for installing the pressure manifold of liquid cooling board, every heavy tank bottom is equipped with the locating hole respectively.

The utility model relates to a box body, wherein two sinking grooves for assembling a collecting pipe are respectively formed in a bottom plate of the box body, and the collecting pipe of a liquid cooling plate is connected with a positioning hole in the sinking groove through a positioning column, so that the fixing and limiting of the liquid cooling plate are realized, the mounting height difference of the collecting pipe of the liquid cooling plate and a harmonica pipe is reduced, the harmonica pipe can be straightly inserted into a collecting pipe cavity, the process cost for manufacturing the liquid cooling plate is saved, and the technical problem that the harmonica pipe in the prior art can be inserted into the collecting pipe cavity only by a warp-up bending process is solved.

As a preferable scheme of the utility model, the box body comprises two sinking grooves which are arranged on the bottom plate of the box body in parallel, and the two sinking grooves are respectively arranged at two ends of the bottom plate of the box body, which are connected with the side wall frames.

As a preferable scheme of the utility model, the bottom of each sinking tank is provided with one positioning hole for fixing and limiting the liquid cooling plate, the positioning holes are used for assembling a collecting pipe of the liquid cooling plate, and the two positioning holes are respectively arranged at two ends of the bottom of the sinking tank in a diagonal manner to prevent the liquid cooling plate from moving along the horizontal direction.

As a preferable scheme of the utility model, the thickness of the bottom plate of the box body is 15-20mm, the depth of each sink groove relative to the surface of the bottom plate of the box body is 3-5mm, the depth of each sink groove is larger than or equal to the distance from the lower end face of the harmonica pipe to the lower end face of the collecting pipe, the collecting pipe is prevented from colliding with the bottom of the sink groove during vibration, the width of the sink groove is larger than the width of the collecting pipe, and the length of the sink groove is longer than the length of the collecting pipe.

As a preferable scheme of the utility model, the box bottom plate is divided into an upper bottom plate and a lower bottom plate, the upper bottom plate is connected with the lower bottom plate through a bottom plate bracket, a frame is arranged around the box bottom plate, a step is arranged at the bottom of the frame, and the lower bottom plate is spliced with the step.

As a preferable mode of the utility model, the length of the lower base plate is longer than that of the upper base plate, the upper base plate is positioned in the lower base plate in the orthographic projection area of the lower base plate, so that protruding parts are formed on the periphery of the lower base plate relative to the upper base plate, the protruding parts of the lower base plate are abutted with the steps, and the upper base plate is abutted with the frame to realize sealing of the base plate and the frame.

As a preferable scheme of the utility model, the upper bottom plate is provided with a plurality of groups of positioning grooves for assembling foam, so that the foam is prevented from being installed and misplaced, each group of positioning grooves comprises two positioning grooves which are oppositely arranged, and each positioning groove is positioned at one side of the sinking groove far away from the side wall frame.

The utility model also provides a liquid cooling plate assembly, which comprises the box body and the liquid cooling plates arranged on the bottom plate of the box body, wherein collecting pipes of the liquid cooling plates are respectively arranged in the sinking grooves.

As a preferable scheme of the utility model, the collecting pipe is connected with the positioning hole on the sink through the positioning column so as to realize the fixed installation of the liquid cooling plate.

As a preferable scheme of the utility model, a plurality of foam is assembled on the positioning groove of the upper bottom plate of the box body, each group of positioning grooves is at least provided with two foam, and the foam is used for supporting a liquid cooling plate, so that the liquid cooling plate can upwards compress the heat conducting medium, and the heat conducting medium is tightly attached to the bottom of the battery cell, thereby ensuring the cooling and heating effects.

As a preferable scheme of the utility model, the harmonica pipe of the liquid cooling plate is laid on the foam, two ends of the harmonica pipe are connected with the cavity of the collecting pipe of the liquid cooling plate, the lower end face of the collecting pipe is lower than the lower end face of the harmonica pipe, and the two ends of the harmonica pipe can be inserted into the cavity of the collecting pipe straightly.

As a preferred scheme of the utility model, the collecting pipe comprises a water inlet pipe and a water outlet pipe, and the cooling liquid flows into the cooling liquid flow channel of the harmonica pipe through the water inlet pipe and flows out of the water outlet pipe, and the water inlet pipe, the water outlet pipe and the harmonica pipe of the collecting pipe form a cooling loop to realize the heat management function of the liquid cooling plate.

As a preferable scheme of the utility model, each harmonica pipe of the liquid cooling plate is provided with a heat conducting medium, two sides of the heat conducting medium are respectively provided with an insulating strip, the insulating strips and the heat conducting medium are arranged in parallel on the same plane, the insulating strips are perpendicular to the collecting pipe, and the insulating strips are used for preventing a battery cell from being in direct contact with the harmonica pipe to influence insulation and simultaneously preventing the heat conducting medium from overflowing.

As a preferred embodiment of the present utility model, the heat-conducting medium includes, but is not limited to, heat-conducting silica gel and heat-conducting pad.

The utility model also provides a battery pack, which comprises the liquid cooling plate assembly, wherein the upper end face of the heat conducting medium of the liquid cooling plate assembly is connected with a module.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

1. according to the box body, the two sinking grooves for assembling the collecting pipes are respectively formed in the bottom plate of the box body, and the collecting pipes of the liquid cooling plate are connected with the positioning holes in the sinking grooves through the positioning columns, so that the fixing and limiting of the liquid cooling plate are realized, the mounting height difference between the collecting pipes of the liquid cooling plate and the harmonica pipe is reduced, the harmonica pipe can be straightly inserted into the collecting pipe cavity, the process cost for manufacturing the liquid cooling plate is saved, and the technical problem that the harmonica pipe in the prior art can be inserted into the collecting pipe cavity only by a warp-up bending process is solved; meanwhile, the step is formed in the bottom of the side wall frame, so that the lower bottom plate of the box body and the step can be directly welded, the sealing performance of the box body is enhanced, and the structural strength of the box body is improved.

2. The liquid cooling plate assembly comprises the box body, the collecting pipe is arranged on the sink grooves at two ends of the bottom plate of the box body, so that the height difference between the collecting pipe and the harmonica pipe is reduced, the distance between the collecting pipe and the bottom plate of the box body is increased, the harmonica pipe can be straightly inserted into the collecting pipe cavity, the technical problem that the harmonica pipe can be inserted into the collecting pipe cavity only by a warp-up bending process is solved, and the process cost for manufacturing the liquid cooling plate is saved.

3. The liquid cooling plate assembly comprises a liquid cooling plate assembly, wherein the collecting pipe is arranged on the sinking grooves at two ends of the bottom plate of the box body, so that the height difference between the collecting pipe and the harmonica pipe is reduced, the distance between the collecting pipe and the bottom plate of the box body is increased, the harmonica pipe can be straightly inserted into the collecting pipe cavity, and therefore the height of the bottom space of the box bottom is reduced and the volume utilization rate of a battery system is improved on the premise that the design of the liquid cooling plate is not changed.

Drawings

FIG. 1 is a schematic diagram of a partial structure of a prior art harmonica-type liquid cooling system;

FIG. 2 is a schematic exploded view of the structure of the present utility model;

FIG. 3 is an exploded view of the case structure of the present utility model;

FIG. 4 is an enlarged schematic view of the structure of portion C in FIG. 3;

FIG. 5 is a schematic diagram of the connection between the base plate and the frame of the present utility model;

FIG. 6 is an enlarged schematic view of the structure of portion F in FIG. 5;

FIG. 7 is a schematic diagram of the connection between the base plate and the frame of the present utility model;

FIG. 8 is a schematic top view of the case structure of the present utility model;

FIG. 9 is an enlarged schematic view of the structure of portion A in FIG. 8;

FIG. 10 is a schematic diagram of a liquid cooling structure according to the present utility model;

FIG. 11 is a schematic view of a liquid cooling structure according to the present utility model;

FIG. 12 is an enlarged schematic view of the structure of portion D of FIG. 11;

FIG. 13 is a schematic view of a liquid cooling plate assembly according to the present utility model;

FIG. 14 is an enlarged schematic view of the structure of the portion G in FIG. 13;

FIG. 15 is a cross-sectional view of the overall structure of the present utility model;

FIG. 16 is an enlarged schematic view of the structure of portion B of FIG. 15 (rotated 90 clockwise);

FIG. 17 is a cross-sectional view of the overall structure of the present utility model;

fig. 18 is an enlarged schematic view of the E-section structure of fig. 17 (rotated 90 ° clockwise).

The marks in the figure: 101-collecting pipe; 102-harmonica tube; 1-a box bottom plate; 111-an upper base plate; 112-a lower plate; 113-a floor support; 2-soaking cotton; 3-liquid cooling plate; 4-a heat conducting medium; 5-insulating strips; 6-module; 7-frame; 8-a sink; 9-positioning holes; 91-positioning columns; 10-positioning grooves; 11-steps; 12-collecting pipe; 121-a water inlet pipe; 122-outlet pipe; 13-harmonica tube.

Detailed Description

The present utility model will be described in detail with reference to the accompanying drawings.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

As shown in fig. 3-4 and fig. 8-9, a box body comprises a box body bottom plate 1, wherein at least one sinking groove 8 is arranged on the box body bottom plate 1, the sinking groove 8 is used for installing a collecting pipe 12 of a liquid cooling plate 3, and a positioning hole 9 is respectively arranged at the bottom of each sinking groove 8.

The box comprises two sinking grooves 8 which are arranged on a box bottom plate 1 in parallel, the two sinking grooves 8 are respectively arranged at two ends of the box bottom plate 1 connected with a side wall frame 7, a positioning hole 9 for fixing and limiting the liquid cooling plate 3 is arranged at the bottom of each sinking groove 8, the positioning hole 9 is used for assembling a collecting pipe 12 of the liquid cooling plate 3, the two positioning holes 9 are respectively arranged at the bottoms of the sinking grooves 8 in a diagonal manner, the liquid cooling plate 3 is prevented from moving along the horizontal direction, and the installation stability is better, as shown in fig. 4 and 9.

The thickness of the bottom plate 1 of the box body is 15-20mm, the depth of each sinking groove 8 relative to the surface of the bottom plate 1 of the box body is 3-5mm, the depth of each sinking groove 8 is greater than or equal to the distance from the lower end face of the harmonica pipe 13 to the lower end face of the collecting pipe 12, the collecting pipe 12 is prevented from colliding with the bottom of the sinking groove 8 during vibration, the width of the sinking groove 8 is greater than the width of the collecting pipe 12, and the length of the sinking groove 8 is longer than the length of the collecting pipe 12, so that the collecting pipe 12 can be completely placed on the sinking groove 8, as shown in fig. 4.

The bottom plate 1 of the box body is divided into an upper bottom plate 111 and a lower bottom plate 112, the upper bottom plate 111 and the lower bottom plate 112 are connected through a bottom plate bracket 113, a frame 7 is arranged around the bottom plate 1 of the box body, a step 11 is arranged at the bottom of the frame 7, and the lower bottom plate 112 and the step 11 are directly subjected to friction stir welding. In particular, the length of the lower base plate 112 is longer than that of the upper base plate 111, the upper base plate 111 is located in the lower base plate 112 in the orthographic projection area of the lower base plate 112, so that the periphery of the lower base plate 112 forms a protruding portion relative to the upper base plate 111, the protruding portion of the lower base plate 112 is abutted with the step 11, the upper base plate 111 is abutted with the frame 7, so that the sealing between the base plate and the frame 7 is realized, meanwhile, the structural strength of the box body is improved, and the welding tightness is enhanced, as shown in fig. 5-7.

Wherein the upper base plate 111 is provided with a plurality of groups of positioning slots 10 for assembling the foam 2, so as to prevent the foam 2 from being installed in a dislocation, each group of positioning slots 10 comprises two positioning slots 10 which are oppositely arranged, and each positioning slot 10 is positioned on one side of the sinking slot 8 far away from the side wall frame 7, as shown in fig. 8-9.

Example 2

The utility model also provides a liquid cooling plate assembly, which comprises the box body and the liquid cooling plates 3 arranged on the bottom plate 1 of the box body, wherein the collecting pipes 12 of the liquid cooling plates 3 are respectively arranged in the sink 8, and the collecting pipes 12 are connected with the positioning holes 9 on the sink 8 through the positioning columns 91 so as to realize the fixed installation of the liquid cooling plates 3, as shown in figures 10-14.

Wherein, be equipped with a plurality of bubble cotton 2 on the constant head tank 10 of box bottom plate 1 upper plate 111, every group constant head tank 10 is equipped with two bubble cotton 2 at least, and bubble cotton 2 is used for supporting liquid cooling board 3, makes liquid cooling board 3 compress tightly heat-conducting medium 4 upwards, makes heat-conducting medium 4 closely laminate with the electric core bottom, makes isolated air increase area of contact simultaneously between electric core and the liquid cooling board 3, has improved heat conduction efficiency to guarantee cooling and heating effect, as shown in fig. 14.

The foam 2 is paved with a harmonica pipe 13 of the liquid cooling plate 3, two ends of the harmonica pipe 13 are connected with a cavity of a collecting pipe 12 of the liquid cooling plate 3, the lower end face of the collecting pipe 12 is lower than the lower end face of the harmonica pipe 13, two ends of the harmonica pipe 13 can be straightly inserted into the cavity of the collecting pipe 12, and the collecting pipe 12 is connected with a positioning hole 9 on a sink 8 through a positioning column 91 so as to realize fixed limiting of the liquid cooling plate 3, as shown in fig. 10-11.

The collecting pipe 12 comprises a water inlet pipe 121 and a water outlet pipe 122, and the cooling liquid flows into a cooling liquid flow channel of the harmonica pipe 13 through the water inlet pipe 121 and flows out of the water outlet pipe 122, and the water inlet pipe 121, the water outlet pipe 122 and the harmonica pipe 13 of the collecting pipe 12 form a cooling loop to realize the heat management function of the liquid cooling plate 3, as shown in fig. 10-11.

Each harmonica pipe 13 of the liquid cooling plate 3 is provided with a heat conducting medium 4, the heat conducting medium 4 is used for transferring heat between the electric core and the harmonica pipe 13, two sides of the heat conducting medium 4 are respectively provided with an insulating strip 5, the insulating strips 5 and the heat conducting medium 4 are arranged in parallel on the same plane, the insulating strips 5 are perpendicular to the collecting pipe 12, the insulating strips 5 are used for preventing the electric core from being in direct contact with the harmonica pipe 13 to affect insulation, and meanwhile, the heat conducting medium 4 is prevented from overflowing, as shown in fig. 14 and 18.

The heat-conducting medium 4 includes, but is not limited to, heat-conducting silica gel and heat-conducting pad.

Example 3

The utility model also provides a battery pack, which comprises the liquid cooling plate assembly, wherein the upper end face of the heat conducting medium 4 of the liquid cooling plate assembly is connected with a module 6, as shown in fig. 2, 15 and 17. Through installing the pressure manifold 12 on the sink 8 at two ends of the box bottom plate 1 to reduce the difference in height between the pressure manifold 12 and the harmonica pipe 13, increase the distance from the pressure manifold 12 to the box bottom plate 1, make the harmonica pipe 13 insert straight into the pressure manifold 12 cavity, the coolant flows into the coolant flow channel of the harmonica pipe 13 through the inlet pipe 121 of the pressure manifold 12, and then flows out from the outlet pipe 122 of the pressure manifold 12, the inlet pipe 121, the outlet pipe 122 and the harmonica pipe 13 of the pressure manifold 12 form a cooling loop, and realize thermal management control on the battery module 6.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (14)

1. The utility model provides a box, includes box bottom plate (1), its characterized in that, be equipped with at least one heavy groove (8) on box bottom plate (1), heavy groove (8) are used for installing collecting main (12) of liquid cooling board (3), every heavy groove (8) bottom is equipped with locating hole (9) respectively.

2. A box according to claim 1, comprising two said sinking grooves (8) arranged in parallel on said bottom plate (1), said sinking grooves (8) being respectively provided at both ends of said bottom plate (1) connected to said side wall frames (7).

3. A tank according to claim 2, characterized in that the bottom of each sinking groove (8) is provided with one positioning hole (9), and two positioning holes (9) are respectively arranged at two ends of the bottom of the sinking groove (8) in a diagonal line.

4. A tank according to claim 2, characterized in that the thickness of the tank bottom plate (1) is 15-20mm, and the depth of each of the sink grooves (8) with respect to the surface of the tank bottom plate (1) is 3-5mm.

5. A box according to any of claims 1-4, characterized in that the box bottom plate (1) is divided into an upper bottom plate (111) and a lower bottom plate (112), a frame (7) is arranged around the box bottom plate (1), a step (11) is arranged at the bottom of the frame (7), and the lower bottom plate (112) is spliced with the step (11).

6. A box according to claim 5, characterized in that the orthographic projection area of the upper base plate (111) on the lower base plate (112) is located in the lower base plate (112) so that the periphery of the lower base plate (112) forms a protruding part relative to the upper base plate (111), the protruding part of the lower base plate (112) is abutted with the step (11), and the upper base plate (111) is abutted with the frame (7).

7. A box according to claim 5, wherein the upper base plate (111) is provided with a plurality of sets of positioning grooves (10), each set of positioning grooves (10) comprising two positioning grooves (10) arranged opposite to each other.

8. A box according to claim 7, characterized in that each of the positioning slots (10) provided in the upper base plate (111) is located on the side of the sink (8) remote from the side wall frame (7).

9. A liquid cooling plate assembly, characterized by comprising a box body according to any one of claims 1-8, and the liquid cooling plate (3) arranged on the bottom plate (1) of the box body, wherein collecting pipes (12) of the liquid cooling plate (3) are respectively arranged in the sink (8).

10. A liquid cooling plate assembly according to claim 9, wherein the header (12) is connected to the locating hole (9) in the sink (8) by a locating post (91).

11. A liquid cooling plate assembly according to claim 9, wherein a plurality of foam (2) are mounted on the positioning grooves (10) of the upper plate (111) of the bottom plate (1) of the box body, and each group of positioning grooves (10) is provided with at least two foam (2).

12. The liquid cooling plate assembly according to claim 11, wherein a harmonica tube (13) of the liquid cooling plate (3) is laid on the foam (2), and two ends of the harmonica tube (13) are connected with a cavity of the collecting pipe (12) of the liquid cooling plate (3).

13. A liquid cooling plate assembly according to claim 12, wherein each harmonica tube (13) of the liquid cooling plate (3) is provided with a heat conducting medium (4), and both sides of the heat conducting medium (4) are respectively provided with insulating strips (5).

14. A battery pack, characterized by comprising a liquid cooling plate assembly according to claim 13, wherein a module (6) is connected to an upper end surface of the heat conducting medium (4) of the liquid cooling plate assembly.