CN216818466U - Liquid cooling temperature equalizing plate structure for battery box - Google Patents

Abstract

The utility model provides a liquid cooling temperature equalizing plate structure for a battery box, and belongs to the technical field of new energy equipment. The liquid cooling temperature-uniforming plate structure comprises an installation base, a flow passage assembly and a temperature-uniforming plate. The mounting base comprises a first cross beam and a second cross beam, and a mounting groove is formed between the first cross beam and the second cross beam. The runner assembly comprises a water inlet buffer cavity, a water outlet buffer cavity, a middle buffer cavity, a plurality of first runners and a plurality of second runners. The temperature equalizing plate cover is arranged above the mounting groove and is fixedly connected with the mounting base. This liquid cooling samming plate structure can effectively reduce the flow resistance of cooling water wherein flowing, guarantees uniformity and reliability to battery module heat dissipation cooling in the battery case.

Description

Liquid cooling temperature equalizing plate structure for battery box

Technical Field

The utility model relates to the technical field of new energy equipment, in particular to a liquid cooling temperature equalizing plate structure for a battery box.

Background

With the development of new energy technology, energy storage equipment and application are increasingly wide, the energy storage performance of a new energy battery is higher and higher, the temperature rise of the battery is overhigh due to high-rate charge and discharge in the use process, the performance, the service life and the like of the battery are influenced, and if the temperature rise is not effectively treated, even thermal runaway can be caused, so that the life safety of a user is endangered. Therefore, a heat dissipation and cooling design is also required to be made in the battery box for storing the new energy battery so as to prolong the service life of the battery module.

In the related art, a liquid cooling plate or a liquid cooling tank structure is usually arranged between a plurality of module gaps of a battery box, a U-shaped cooling water heat exchange pipe is usually integrated in the liquid cooling plate or the liquid cooling tank structure, the liquid cooling plate or the liquid cooling tank structure is connected with a water supply mechanism such as a cooling water tank in a power utilization terminal such as a new energy automobile, and heat exchange is carried out between the cooling water and a heating battery module through flowing of the cooling water, so that heat dissipation and cooling are realized.

By adopting the heat dissipation and cooling design in the related technology, the bent turning parts of the cooling water heat exchange tubes in the liquid cooling pipelines are more, so that the flow resistance of the cooling water in the flowing process is larger, and the flow rate of the cooling water and the flow uniformity of the cooling water passing through the battery module can not be ensured. And set up the booster pump for this purpose specially and improve the velocity of flow and again can lead to whole cost to improve, be difficult to accomplish flow, flow resistance and temperature uniformity's compromise, lead to the heat dissipation cooling performance lower.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a liquid-cooling temperature equalizing plate structure for a battery box, which can effectively reduce the flow resistance of cooling water and ensure the uniformity and reliability of heat dissipation and temperature reduction of a battery module in the battery box. The technical scheme is as follows:

the embodiment of the utility model provides a liquid cooling temperature equalizing plate structure for a battery box, which comprises:

the water inlet and water outlet are arranged on the first cross beam, a partition plate is arranged in the installation groove, one end of the partition plate is vertically connected with the first cross beam, the other end of the partition plate is arranged at an interval with the second cross beam, and the installation groove is averagely divided into a first flow channel area and a second flow channel area by the partition plate;

the runner assembly comprises a water inlet buffer chamber, a water outlet buffer chamber, a middle buffer chamber, a plurality of first runners and a plurality of second runners, wherein the water inlet buffer chamber and the plurality of first runners are positioned in the first runner area, the water inlet buffer chamber is positioned between the first beam and the plurality of first runners, one end of the water inlet buffer chamber is communicated with the water inlet, the plurality of first runners are perpendicular to the first beam and are arranged side by side along the horizontal direction, the other end of the water inlet buffer chamber is communicated with one ends of the plurality of first runners, the water outlet buffer chamber and the plurality of second runners are positioned in the second runner area, the water outlet buffer chamber is positioned between the first beam and the plurality of second runners, one end of the water outlet buffer chamber is communicated with the water outlet, the plurality of second runners are perpendicular to the first beam and are arranged side by side along the horizontal direction, the other end of the water outlet buffer cavity is communicated with one end of the plurality of second flow channels, the middle buffer cavity is positioned between the other end of the partition plate and the second cross beam, and the other ends of the plurality of first flow channels and the other ends of the plurality of second flow channels are communicated with the middle buffer cavity;

the temperature equalizing plate is covered on the mounting groove and attached to the partition plate and the flow channel assembly, and the temperature equalizing plate is fixedly connected with the mounting base.

Optionally, a water inlet collecting pipe is arranged in the first beam, the water inlet collecting pipe is arranged along the length direction of the first beam, one side of the water inlet collecting pipe is communicated with the water inlet, the other side of the water inlet collecting pipe is communicated with the water inlet buffer cavity through a plurality of tubular water inlet holes, and the plurality of tubular water inlet holes are uniformly arranged at intervals along the length direction of the first beam.

Optionally, a water outlet collecting pipe is arranged in the first beam, the water outlet collecting pipe is arranged along the length direction of the first beam, one side of the water outlet collecting pipe is communicated with the water outlet, the other side of the water outlet collecting pipe is communicated with the water outlet buffer cavity through a plurality of tubular water outlet holes, and the plurality of tubular water outlet holes are uniformly arranged at intervals along the length direction of the first beam.

Optionally, the number of the tubular water outlet holes is less than the amount of water in the tubular water inlet hole.

Optionally, a guide plate is arranged in the middle buffer cavity, one end of the guide plate is fixedly connected with the second cross beam, the other end of the guide plate is fixedly connected with the side wall of the middle buffer cavity close to one side of the second flow channel region, and the guide plate and the second cross beam are arranged at an acute angle.

Optionally, the angle of the deflector to the second beam ranges from 10 ° to 15 °.

Optionally, the temperature equalization plate comprises a first plate body and a second plate body, and the first plate body and the second plate body are symmetrically arranged relative to the partition plate and are connected through tailor welding.

Optionally, the cross sections of the first flow channel and the second flow channel are square, and the length range of the side of the cross section of the first flow channel and the length range of the side of the cross section of the second flow channel are less than or equal to 10 mm.

Optionally, the mounting base, the runner assembly and the temperature-uniforming plate are all aluminum alloy structural members.

The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:

when the new energy battery box is assembled, the installation base of the liquid cooling temperature equalizing plate framework can be arranged at the bottom of the battery box, and a water inlet and a water outlet on the first cross beam can be respectively connected with a cooling water circulation structure, such as a water tank, configured in the electric terminal. After cooling water let in the installation base by the water inlet, can preferentially enter into the buffer chamber of intaking in first flow channel district and assemble the back and get into a plurality of first flow channels by the other end again, get into the middle buffer chamber that is close to the second crossbeam by a plurality of first flow channels again. After entering the middle buffer cavity and being gathered, the cooling water flows to one end close to the second flow channel area under the action of the power of the subsequently poured cooling water and enters the second flow channels from the communication part of the middle buffer cavity. And the cooling water in the second flow channels enters the water outlet buffer cavity in the direction opposite to that in the first flow channels, and finally is discharged out of the mounting base through the water outlet to complete the circulation.

The battery module in the battery box can be arranged on the surface of the temperature-equalizing plate which covers the mounting groove and is back to one side of the mounting groove, and the work of the battery module and the generated heat can be transferred to a plurality of first runners and a plurality of second runners on the other side through the temperature-equalizing plate. Through carrying out the heat exchange with the cooling water that flows, the cooling water can absorb heat and leave the battery case with the heat band at the circulation in-process, realizes the heat dissipation cooling. A plurality of first runners and a plurality of second runners for cooling water power in the liquid cooling temperature equalizing plate structure are evenly arranged in parallel along the horizontal direction during working, the contact area between cooling water and the temperature equalizing plate can be increased by the arrangement mode of harmonica tubes, and the heat exchange efficiency is guaranteed. And only one turning of the middle buffer cavity is arranged in the flowing process, so that the flowing resistance of the cooling water can be effectively reduced. Simultaneously correspond at water inlet and delivery port department and set up into water cushion chamber and play water cushion chamber, can collect before the cooling water carries out the heat exchange circulation, make the flow and the pressure of the cooling water of business turn over first runner and second runner invariable, guarantee the homogeneity and the reliability to battery module heat dissipation cooling in the battery case.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic perspective view illustrating a liquid-cooled temperature-uniforming plate structure for a battery box according to an embodiment of the present invention;

fig. 2 is a schematic top view of a liquid-cooled vapor chamber structure for a battery case according to an embodiment of the present invention;

fig. 3 is a schematic view of an internal structure of a liquid-cooled temperature-uniforming plate structure provided in the embodiment of the present invention after a temperature-uniforming plate is removed;

FIG. 4 is a cross-sectional view of the structure as shown at A-A in FIG. 3;

FIG. 5 is an enlarged view of a portion of the structure shown at B in FIG. 4;

fig. 6 is a schematic structural diagram of a flow channel assembly according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the related art, a liquid cooling plate or a liquid cooling tank structure is usually arranged between a plurality of module gaps of a battery box, a U-shaped cooling water heat exchange pipe is usually integrated in the liquid cooling plate or the liquid cooling tank structure, the liquid cooling plate or the liquid cooling tank structure is connected with a water supply mechanism such as a cooling water tank in a power utilization terminal such as a new energy automobile, and heat exchange is carried out between the cooling water and a heating battery module through flowing of the cooling water, so that heat dissipation and cooling are realized.

By adopting the heat dissipation and cooling design in the related technology, the bent turning parts of the cooling water heat exchange tubes in the liquid cooling pipelines are more, so that the flow resistance of the cooling water in the flowing process is larger, and the flow rate of the cooling water and the flow uniformity of the cooling water passing through the battery module can not be ensured. And set up the booster pump for this purpose specially and improve the velocity of flow and again can lead to whole cost to improve, be difficult to accomplish flow, flow resistance and temperature uniformity's compromise, lead to the heat dissipation cooling performance lower.

Fig. 1 is a schematic perspective view of a liquid-cooled temperature equalization plate structure for a battery case according to an embodiment of the present invention. Fig. 2 is a schematic top view of a liquid-cooled temperature equalization plate structure for a battery box according to an embodiment of the present invention. Fig. 3 is a schematic view of an internal structure of a liquid-cooled temperature-uniforming plate structure with a temperature-uniforming plate removed according to an embodiment of the present invention. Fig. 4 is a cross-sectional view of the structure as shown at a-a in fig. 3. Fig. 5 is a partial structure enlarged schematic view as at B in fig. 4. Fig. 6 is a schematic structural diagram of a flow channel assembly according to an embodiment of the present invention. As shown in fig. 1 to 6, by practice, the present applicant provides a liquid-cooled temperature-uniforming plate structure for a battery case, including a mounting base 1, a flow channel assembly 2, and a temperature-uniforming plate 3.

The mounting base 1 is provided with a first beam 11 and a second beam 12 at two ends thereof, the first beam 11 and the second beam 12 are arranged in parallel at intervals, a mounting groove 13 is arranged between the first beam 11 and the second beam 12, and the first beam 11 is provided with a water inlet 111 and a water outlet 112. A partition plate 131 is disposed in the installation groove 13, one end of the partition plate 131 is vertically connected to the first beam 11, the other end of the partition plate 131 is spaced apart from the second beam 12, and the partition plate 131 equally divides the installation groove 13 into a first flow path region 13a and a second flow path region 13 b.

The flow channel assembly 2 includes a water inlet buffer chamber 21, a water outlet buffer chamber 22, an intermediate buffer chamber 23, a plurality of first flow channels 24, and a plurality of second flow channels 25. The intake buffer chamber 21 and the plurality of first flow passages 24 are located in the first flow passage section 13a, and the intake buffer chamber 21 is located between the first beam 11 and the plurality of first flow passages 24. One end of the water inlet buffer chamber 21 is communicated with the water inlet 111, the plurality of first flow channels 24 are perpendicular to the first beam 11 and are arranged in parallel along the horizontal direction, and the other end of the water inlet buffer chamber 21 is communicated with one end of the plurality of first flow channels 24. The outlet buffer chamber 22 and the plurality of second flow channels 25 are located in the second flow channel region 13b, and the outlet buffer chamber 22 is located between the first beam 11 and the plurality of second flow channels 25. One end of the water outlet buffer cavity 22 is communicated with the water outlet 112, the plurality of second flow channels 25 are perpendicular to the first beam 11 and are arranged in parallel along the horizontal direction, and the other end of the water outlet buffer cavity 22 is communicated with one end of the plurality of second flow channels 25. The intermediate buffer chamber 23 is located between the other end of the partition plate 131 and the second cross member 12, and the other ends of the plurality of first flow passages 24 and the other ends of the plurality of second flow passages 25 are both communicated with the intermediate buffer chamber 23.

The temperature-uniforming plate 3 is covered above the mounting groove 13 and attached to the partition plate 131 and the flow channel assembly 2, and the temperature-uniforming plate 3 is fixedly connected with the mounting base 1.

In the embodiment of the present invention, when assembling the new energy battery box, the mounting base 1 of the liquid-cooled temperature-equalizing plate structure may be disposed at the bottom of the battery box, wherein the water inlet 111 and the water outlet 112 on the first beam 11 may be respectively connected to a cooling water circulation structure, such as a water tank, disposed in the electric terminal. After the cooling water is introduced into the mounting base 1 through the water inlet 111, the cooling water preferentially enters the water inlet buffer cavity 21 of the first flow channel area 13a to be converged, then enters the plurality of first flow channels 24 through the other end, and then enters the middle buffer cavity 23 close to the second cross beam 12 through the plurality of first flow channels 24. After entering the intermediate buffer cavity 23 and converging, the cooling water flows toward one end close to the second flow channel region 13b under the power of the subsequently inrush cooling water, and enters the plurality of second flow channels 25 from the communication part with the intermediate buffer cavity 23. The cooling water in the plurality of second flow channels 25 enters the outlet buffer chamber 22 in the opposite direction to that in the first flow channel 24, and finally exits the mounting base 1 through the outlet 112 to complete the cycle. The battery modules in the battery box may be disposed on a surface of the temperature-uniforming plate 3 covering the mounting groove 13, the surface facing away from one side of the mounting groove 13, and work and generated heat may be transferred to the plurality of first flow channels 24 and the plurality of second flow channels 25 located at the other side through the temperature-uniforming plate 3. Through carrying out the heat exchange with the cooling water that flows, the cooling water can absorb heat and leave the battery case with the heat band at the circulation in-process, realizes the heat dissipation cooling. A plurality of first runners 24 and a plurality of second runners 25 for cooling water power in the liquid cooling temperature equalizing plate structure are evenly arranged in parallel along the horizontal direction during working, the contact area between cooling water and the temperature equalizing plate 3 can be increased by the arrangement mode of harmonica tubes, and the heat exchange efficiency is guaranteed. And only one turning part of the middle buffer cavity 23 is arranged in the flowing process, so that the flowing resistance of the cooling water can be effectively reduced. Simultaneously, the water inlet buffer cavity 21 and the water outlet buffer cavity 22 are correspondingly arranged at the water inlet 111 and the water outlet 112, and can be converged before cooling water is subjected to heat exchange circulation, so that the flow and the pressure of the cooling water flowing into and out of the first flow passage 24 and the second flow passage 25 are constant, and the uniformity and the reliability of heat dissipation and cooling of the battery modules in the battery box are ensured.

Optionally, the cross sections of the first flow channel 24 and the second flow channel 25 are in a square shape, and the length range of the side of the cross section of the first flow channel 24 and the second flow channel 25 is less than or equal to 10 mm. Illustratively, in the embodiment of the present invention, the first flow channel 24 and the second flow channel 25 are square structures formed by extrusion through an extrusion die, the structure is simple, the formation is convenient, the contact area with the temperature equalization plate 3 can be increased on the basis of improving the uniformity of the fluid, the heat exchange efficiency is improved, and the production cost is reduced.

Optionally, a water inlet collecting pipe 113 is arranged in the first beam 11, the water inlet collecting pipe 113 is arranged along the length direction of the first beam 11, one side of the water inlet collecting pipe 113 is communicated with the water inlet 111, the other side of the water inlet collecting pipe 113 is communicated with the water inlet buffer cavity 21 through a plurality of tubular water inlet holes 1131, and the plurality of tubular water inlet holes 1131 are arranged at even intervals along the length direction of the first beam 11. Illustratively, in the embodiment of the present invention, by providing the water inlet collecting pipe 113, the cooling water entering from the water inlet 111 is preferentially collected in the water inlet collecting pipe 113 for the first time before flowing into the water inlet buffer cavity 21, and is collected for the second time after flowing into the water inlet buffer cavity 21 after the uniform flow guidance of the plurality of tubular water inlet holes 1131, so as to achieve the secondary flow stabilization, so that the flow distribution and the pressure of the cooling water entering the plurality of first flow channels 24 are more uniform and constant, and the uniformity and the reliability of cooling and heat dissipation of the battery modules in the battery box are further improved.

Optionally, a water outlet collecting pipe 114 is disposed in the first cross beam 11, the water outlet collecting pipe 114 is arranged along the length direction of the first cross beam 11, one side of the water outlet collecting pipe 114 is communicated with the water outlet 112, the other side of the water outlet collecting pipe 114 is communicated with the water outlet buffer cavity 22 through a plurality of tubular water outlet holes 1141, and the plurality of tubular water outlet holes 1141 are uniformly arranged at intervals along the length direction of the first cross beam 11. Exemplarily, in the embodiment of the present invention, by providing the water outlet collecting pipe 114, the cooling water that completes the heat exchange cycle in the plurality of second flow channels 25 is collected at one side of the water storage buffer cavity 23, and then enters the water outlet collecting pipe 114 for secondary collection after being guided by the uniform flow of the plurality of tubular water outlet holes 1141, so as to be discharged from the water outlet 112 after secondary stable flow, so that the water discharge is more stable, the flow resistance is prevented from increasing to cause backward flow, and the uniformity and reliability of the heat dissipation and cooling of the battery modules in the battery box are further improved.

Optionally, the number of tubular water outlet holes 1141 is less than the amount of water in the tubular water inlet holes 1131. Illustratively, in the embodiment of the present invention, since the distribution requirement of the flow rate and the pressure of the cooling water introduced into the water inlet 111 is high, it is necessary to ensure sufficient flow rate and pressure to complete the whole set of heat exchange cycle while ensuring uniformity, and the distribution requirement of the flow rate and the pressure is low due to the power supply of the subsequent cooling water during the water discharging process. Therefore, on the basis of ensuring smooth water outlet, the number of the tubular water outlet holes 1141 can be properly reduced relative to the tubular water inlet holes 1131 to reduce the material consumption and the processing procedures, thereby reducing the production cost.

Optionally, a flow guide plate 231 is arranged in the middle buffer cavity 23, one end of the flow guide plate 231 is fixedly connected with the second beam 12, the other end of the flow guide plate 231 is fixedly connected with the side wall of the middle buffer cavity 23 close to one side of the second flow passage area 13b, and the flow guide plate 231 and the second beam 12 are arranged at an acute angle. Exemplarily, in the embodiment of the present invention, after the cooling water enters the middle buffer cavity 23 after heat exchange in the first flow channel region 13a is completed, the flow guide plate 231 is disposed in an inclined arrangement by brazing, so that the cooling water entering the middle buffer cavity 23 can be effectively extruded and distributed, and can more smoothly enter the plurality of second flow channels 25 of the second flow channel region 13b, thereby further improving the uniformity of the fluid flowing in the liquid-cooled temperature equalizing plate structure.

Exemplarily, in the embodiment of the present invention, the angle of the deflector 231 with the second beam 12 ranges from 10 ° to 15 °.

Alternatively, the vapor chamber 3 includes a first plate 31 and a second plate 32, and the first plate 31 and the second plate 32 are symmetrically arranged with respect to the partition 131 and are connected by tailor welding. Illustratively, in the embodiment of the utility model, the edges of the temperature equalization plates 3 are respectively welded and connected with the mounting base 1 by a friction stir welding process. The temperature-uniforming plate 3 is welded by two plate bodies, so that the connection strength of the temperature-uniforming plate 3 and the mounting base 1 is further improved, the number of assembling procedures and parts is reduced, the assembling efficiency is improved, and the overall cost is reduced.

Optionally, the mounting base 1, the flow channel assembly 2 and the temperature-uniforming plate 3 are all aluminum alloy structural members. Exemplarily, in the embodiment of the present invention, the mounting base 1, the flow channel assembly 2, and the temperature-uniforming plate 3 are all made of high-quality 6-series aluminum alloy produced by a heat treatment pre-stretching process, and the 6-series aluminum alloy has good formability, weldability, and machinability, and high mechanical strength, so as to ensure gravity on a new energy battery cell or module, and effectively improve the practical life.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.

The utility model is not to be considered as limited to the particular embodiments shown and described, but is to be understood that various modifications, equivalents, improvements and the like can be made without departing from the spirit and scope of the utility model.

Claims (9)

1. The utility model provides a liquid cooling samming plate structure for battery case which characterized in that includes:

the mounting structure comprises a mounting base (1), wherein a first cross beam (11) and a second cross beam (12) which are arranged in parallel at intervals are arranged at two ends of the mounting base (1), a mounting groove (13) is formed between the first cross beam (11) and the second cross beam (12), a water inlet (111) and a water outlet (112) are formed in the first cross beam (11), a partition plate (131) is arranged in the mounting groove (13), one end of the partition plate (131) is vertically connected with the first cross beam (11), the other end of the partition plate (131) is arranged in an interval with the second cross beam (12), and the partition plate (131) divides the mounting groove (13) into a first flow channel area (13a) and a second flow channel area (13b) on average;

the flow channel assembly (2) comprises a water inlet buffer cavity (21), a water outlet buffer cavity (22), a middle buffer cavity (23), a plurality of first flow channels (24) and a plurality of second flow channels (25), wherein the water inlet buffer cavity (21) and the plurality of first flow channels (24) are positioned in the first flow channel area (13a), the water inlet buffer cavity (21) is positioned between the first cross beam (11) and the plurality of first flow channels (24), one end of the water inlet buffer cavity (21) is communicated with the water inlet (111), the plurality of first flow channels (24) are perpendicular to the first cross beam (11) and are arranged in parallel along the horizontal direction, the other end of the water inlet buffer cavity (21) is communicated with one ends of the plurality of first flow channels (24), the water outlet buffer cavity (22) and the plurality of second flow channels (25) are positioned in the second flow channel area (13b), the water outlet buffer cavity (22) is located between the first cross beam (11) and the plurality of second flow channels (25), one end of the water outlet buffer cavity (22) is communicated with the water outlet (112), the plurality of second flow channels (25) are perpendicular to the first cross beam (11) and are arranged in parallel along the horizontal direction, the other end of the water outlet buffer cavity (22) is communicated with one ends of the plurality of second flow channels (25), the middle buffer cavity (23) is located between the other end of the partition plate (131) and the second cross beam (12), and the other ends of the plurality of first flow channels (24) and the other ends of the plurality of second flow channels (25) are communicated with the middle buffer cavity (23);

the temperature-equalizing plate (3), establish in temperature-equalizing plate (3) lid mounting groove (13) top and with baffle (131) with runner subassembly (2) paste mutually, temperature-equalizing plate (3) with installation base (1) fixed connection.

2. The liquid-cooled temperature equalizing plate structure for the battery box according to claim 1, wherein a water inlet collecting pipe (113) is arranged in the first beam (11), the water inlet collecting pipe (113) is arranged along the length direction of the first beam (11), one side of the water inlet collecting pipe (113) is communicated with the water inlet (111), the other side of the water inlet collecting pipe (113) is communicated with the water inlet buffer cavity (21) through a plurality of tubular water inlet holes (1131), and the plurality of tubular water inlet holes (1131) are uniformly arranged along the length direction of the first beam (11) at intervals.

3. The liquid-cooled temperature equalizing plate structure for the battery box according to claim 2, wherein a water outlet collecting pipe (114) is provided in the first beam (11), the water outlet collecting pipe (114) is arranged along the length direction of the first beam (11), one side of the water outlet collecting pipe (114) is communicated with the water outlet (112), the other side of the water outlet collecting pipe (114) is communicated with the water outlet buffer cavity (22) through a plurality of tubular water outlet holes (1141), and the plurality of tubular water outlet holes (1141) are arranged along the length direction of the first beam (11) at uniform intervals.

4. The liquid-cooled temperature equalization plate structure for battery case according to claim 3, wherein the number of the tubular water outlet holes (1141) is less than the amount of water of the tubular water inlet holes (1131).

5. The liquid-cooled temperature equalizing plate structure for the battery box according to claim 1, wherein a flow guiding plate (231) is disposed in the middle buffer chamber (23), one end of the flow guiding plate (231) is fixedly connected to the second beam (12), the other end of the flow guiding plate (231) is fixedly connected to the side wall of the middle buffer chamber (23) close to the second flow channel region (13b), and the flow guiding plate (231) and the second beam (12) are arranged at an acute angle.

6. The liquid-cooled temperature equalization plate structure for battery case according to claim 5, wherein the angle of the flow guide plate (231) to the second beam (12) ranges from 10 ° to 15 °.

7. The liquid-cooled temperature-equalizing plate structure for battery cases according to any one of claims 1 to 6, characterized in that the temperature-equalizing plate (3) comprises a first plate body (31) and a second plate body (32), the first plate body (31) and the second plate body (32) being symmetrically arranged with respect to the partition plate (131) and being connected by means of tailor welding.

8. The liquid-cooled temperature-equalizing plate structure for battery case according to any one of claims 1 to 6, wherein the cross-sections of the first flow channel (24) and the second flow channel (25) are square, and the length of the side of the cross-section of the first flow channel (24) and the second flow channel (25) is less than or equal to 10 mm.

9. The liquid-cooled temperature-equalizing plate structure for battery box according to any one of claims 1 to 6, characterized in that the mounting base (1), the flow channel assembly (2) and the temperature-equalizing plate (3) are all aluminum alloy structural members.

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