Liquid cooling plate, lower box body and liquid cooling battery pack

Abstract

The utility model provides a liquid cooling plate, a lower box body and a liquid cooling battery pack. The liquid cooling plate comprises a liquid cooling cover plate, the flow channel assembly is arranged below the liquid cooling cover plate, the flow channel assembly comprises a first flow collecting pipe, a second flow collecting pipe and a plurality of harmonica-shaped pipes, a plurality of puncture flanging holes are formed in the side walls of the first flow collecting pipe and the second flow collecting pipe, the two ends of the harmonica-shaped pipes extend into the puncture flanging holes and then are welded with the puncture flanging holes, and the first flow collecting pipe is communicated with the second flow collecting pipe; and the liquid inlet pipe and the liquid outlet pipe are communicated with the first collecting pipe. According to the liquid cooling plate provided by the utility model, the side walls of the first collecting pipe and the second collecting pipe are provided with the plurality of puncture flanging holes, and the two ends of the plurality of harmonica-shaped pipes extend into the puncture flanging holes and then are welded with the puncture flanging holes, so that the welding contact area between the collecting pipes and the harmonica-shaped pipes is increased through the puncture flanging holes; therefore, the service life of the liquid cooling plate is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a liquid cooling plate, lower box and liquid cooling battery pack. BACKGROUND

[0002] Due to the continuous development of energy storage industry, the battery density is higher and higher, and the heat dissipation requirement of temperature control product is also improved, and the liquid cooling technology expands the demand of terminal market with stronger heat dissipation effect and energy saving performance. The energy storage system has the characteristics of large battery capacity, high power and high heat dissipation requirement, and the problem of uneven temperature distribution exists in the energy storage system. These characteristics determine that the energy storage system must manage the heat of the battery, otherwise the temperature will be too high to affect the capacity, life and safety of the battery, and even may cause thermal runaway.

[0003] At present, the energy storage heat management technology route is mainly divided into air cooling, liquid cooling, heat pipe cooling and phase change cooling, among which the heat pipe and phase change cooling technology are not mature, and the air cooling and liquid cooling are still the main methods. Air cooling is to use low-temperature air as medium, and use natural wind or fan to produce heat convection with the battery, so as to reduce the temperature of the battery. The air cooling structure is simple, but the heat exchange efficiency is low and precise temperature control cannot be realized. Compared with traditional air cooling, liquid cooling uses the high thermal conductivity and high heat capacity characteristics of liquid to replace air as the heat dissipation medium. Therefore, setting a liquid cooling plate under the battery module is the design of most liquid cooling battery packs.

[0004] In the process of realizing the utility model, the inventor finds that at least the following problems exist in the prior art: some liquid cooling plates adopt stamping and brazing type, the stamping and brazing type liquid cooling plate needs to open the mold, the mold cost is high, the mold manufacturing cycle is long, the overall liquid cooling plate is thin, the flatness is difficult to control, and the installation difficulty is increased. UTILITY MODEL CONTENTS

[0005] The utility model aims at least to solve one of the technical problems in the related art to some extent.

[0006] Therefore, the purpose of the utility model is to provide a liquid cooling plate, a lower box and a liquid cooling battery pack, improve the reliability of assembly, prolong the service life and reduce the manufacturing cost.

[0007] To achieve the above purpose, the utility model provides a liquid cooling plate in the first aspect, which comprises:

[0008] Liquid cooling cover plate;

[0009] Flow channel assembly, the flow channel assembly is arranged below the liquid cooling cover plate, the flow channel assembly comprises a first flow collecting pipe, a second flow collecting pipe and a plurality of mouth organ pipes, a plurality of piercing flange holes are arranged on the side wall of the first flow collecting pipe and the second flow collecting pipe, and the two ends of the plurality of mouth organ pipes are inserted into the piercing flange holes and welded therewith, so that the first flow collecting pipe and the second flow collecting pipe are communicated;

[0010] An inlet pipe and an outlet pipe, in communication with the first manifold.

[0011] According to the liquid cooling plate, the side walls of the first manifold and the second manifold are provided with a plurality of piercing flange holes, two ends of the plurality of accordion tubes are inserted into the piercing flange holes and welded thereto, the piercing flange holes increase the welding contact area of the manifold and the accordion tubes, the combination reliability of the two is enhanced, and therefore the service life of the liquid cooling plate is improved, and meanwhile, the accordion tube has the advantages of low cost, light weight, relatively simple structure and high production efficiency.

[0012] According to an embodiment of the utility model, the cross section of the first manifold and the second manifold is a "day" type.

[0013] According to an embodiment of the utility model, the plurality of accordion tubes are divided into four groups of pipelines along a first direction, and are respectively a first group of pipelines to a fourth group of pipelines, each group of the pipelines comprises at least one of the accordion tubes, the upper half of the "day" type of the first manifold is partitioned in the middle, and the lower half of the "day" type of the second manifold is partitioned in the middle.

[0014] According to an embodiment of the utility model, the inlet pipe and the outlet pipe are in communication with the upper half of the "day" type of the first manifold, the front ends of the first group of pipelines and the fourth group of pipelines are in communication with the upper half of the "day" type of the first manifold, the front ends of the second group of pipelines to the third group of pipelines are in communication with the lower half of the "day" type of the first manifold, and the rear ends of the first group of pipelines to the fourth group of pipelines are in communication with the lower half of the "day" type of the second manifold.

[0015] The utility model discloses a lower box body, including the liquid cooling plate of first aspect, bottom frame and support beam, bottom frame is established below the liquid cooling plate, the number of support beam is multiple, and is established above the liquid cooling plate.

[0016] According to an embodiment of the utility model, the bottom frame comprises an outer frame and an inner frame, the inner frame is arranged in the outer frame, and the inner frame is connected with the outer frame.

[0017] According to an embodiment of the utility model, the outer frame comprises a pair of first cross beams and a pair of first longitudinal beams connected together, the inner frame comprises a pair of second longitudinal beams, a pair of second cross beams, a plurality of third cross beams and a plurality of third longitudinal beams, the second longitudinal beams and the second cross beams are connected end to end, the plurality of third cross beams and the plurality of third longitudinal beams are arranged in a crisscross manner, the two ends of the third cross beams are connected with the first cross beams, the third longitudinal beams are located above the third cross beams, and the first cross beams, the first longitudinal beams, the second longitudinal beams and the second cross beams are formed into a tubular shape by bending sheet metal.

[0018] According to one embodiment of the present application, the third longitudinal beam is a square tube, and the first and second transverse beams are provided with a plurality of protruding portions.

[0019] The third aspect of the present application provides a liquid-cooled battery pack, comprising the lower box body, the cell module and the upper cover body of the second aspect, the cell module is connected above the lower box body, the upper cover body is connected with the edge of the lower box body, and the cell module is closed.

[0020] According to one embodiment of the present application, the upper cover body is provided with an opening, and the panel module is nested in the opening.

[0021] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in the different drawings represent the same or similar elements. Among them:

[0023] Figure 1 is a structural schematic diagram of a liquid cooling plate according to one embodiment of the present application.

[0024] Figure 2 is a structural schematic diagram of a flow channel assembly according to one embodiment of the present application.

[0025] Figure 3 is a structural schematic diagram of a lower box body according to one embodiment of the present application.

[0026] Figure 4 is Figure 3 is an exploded structural schematic diagram of the lower box body in

[0027] Figure 5 is a structural schematic diagram of a bottom frame of the lower box body.

[0028] Figure 6 is a structural schematic diagram of a liquid-cooled battery pack according to one embodiment of the present application.

[0029] Figure 7 is Figure 6 is an exploded structural schematic diagram of the liquid-cooled battery pack in

[0030] BRIEF DESCRIPTION OF DRAWINGS:

[0031] 10 - liquid cooling plate, 11 - liquid cooling cover plate, 12 - flow channel assembly, 13 - support beam, 14 - liquid inlet pipe, 15 - liquid outlet pipe, 20 - bottom frame, 21 - outer frame, 22 - inner frame, 100 - lower box body, 121 - second manifold, 122 - first manifold, 123 - mouthpiece, 200 - battery cell module, 211 - first cross beam, 212 - first longitudinal beam, 213 - protruding part, 221 - second longitudinal beam, 222 - second cross beam, 223 - third longitudinal beam, 224 - third cross beam, 300 - upper box body, 301 - opening, 400 - panel module, 500 - lifting lug. DETAILED DESCRIPTION

[0032] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numbers represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0033] Reference is made below to Figure 1 and Figure 2 , describe the liquid cooling plate 10 according to the embodiments of the present application.

[0034] In combination with Figure 1 and Figure 2 shown, a liquid cooling plate includes a liquid cooling cover plate 11, a flow channel assembly 12, a liquid inlet pipe 14 and a liquid outlet pipe 15.

[0035] The liquid cooling cover plate 11 is flat and mainly bears the components above, such as battery modules. The flow channel assembly 12 is arranged below the liquid cooling cover plate 11 and includes a first manifold 122, a second manifold 121, and a plurality of accordion tubes 123. The sidewalls of the first manifold 122 and the second manifold 121 are provided with a plurality of piercing and flanging holes. The two ends of the plurality of accordion tubes 123 extend into the piercing and flanging holes and are welded thereto, thereby connecting the first manifold 122 and the second manifold 121. The piercing and flanging hole is a process of piercing and flanging a plate by a mold without pre-punching, and finally forms an opening with a certain shape and size. The cross section of the accordion tube 123 is similar to that of a harmonica. The accordion tube 123 is provided with a plurality of rectangular channels extending in a second direction. The second direction is exemplarily the length direction of the accordion tube. The accordion tube 123 is configured as a liquid cooling pipe to conduct and dissipate heat. The inlet pipe 14 and the outlet pipe 15 are in communication with the first manifold 122 and are respectively used for the inlet and outlet of the cooling liquid. The specific type of the first manifold 122 and the second manifold 121 is set according to actual needs. Exemplarily, the cross section of the first manifold 122 and the second manifold 121 is rectangular, which is easy to position and align. The number of the accordion tubes 123 is set according to actual needs.

[0036] According to the liquid cooling plate, the sidewalls of the first manifold and the second manifold are provided with a plurality of piercing and flanging holes, and the two ends of the plurality of accordion tubes extend into the piercing and flanging holes and are welded thereto. The piercing and flanging holes increase the welding contact area of the manifold and the accordion tube, enhance the combination reliability of the two, and improve the service life of the liquid cooling plate. Meanwhile, the accordion tube has the advantages of low cost, light weight, relatively simple structure, and high production efficiency.

[0037] In some embodiments, the cross section of the first manifold 122 and the second manifold 121 is a "sun" type. The plurality of accordion tubes 123 are divided into four groups of pipes along a first direction, which are respectively the first to fourth groups of pipes. Each group of pipes includes at least one accordion tube 123. The upper half of the "sun" type of the first manifold 122 is interrupted in the middle, and the lower half of the "sun" type of the second manifold 121 is interrupted in the middle. The type of the first direction is set according to needs. Exemplarily, the first direction is the width direction of the liquid cooling plate, and each group of pipes includes two parallel arranged accordion tubes 123.

[0038] Specifically, the inlet pipe 14 and the outlet pipe 15 are in communication with the upper half of the "sun" type of the first manifold 122. The front ends of the first and fourth groups of pipes are in communication with the upper half of the "sun" type of the first manifold 122, and the front ends of the second and third groups of pipes are in communication with the lower half of the "sun" type of the first manifold 122. The rear ends of the first to fourth groups of pipes are in communication with the lower half of the "sun" type of the second manifold 121.

[0039] AsFigure 2 As shown, the flow path of the cooling liquid is as follows: the cooling liquid enters the first header pipe 122 from the inlet pipe 14, flows to the second header pipe 121 along the positive direction of the second direction in the first group of pipes, turns back, flows to the first header pipe 122 along the reverse direction of the second direction in the second group of pipes, turns back, flows to the second header pipe 121 along the positive direction of the second direction in the third group of pipes, turns back, flows to the first header pipe 122 along the reverse direction of the second direction in the fourth group of pipes, and finally flows out from the outlet pipe 15.

[0040] In summary, the liquid cooling plate can flexibly adjust the length of the organ pipe, can arrange multiple parallel branches as needed, is simple and convenient to integrate and lightweight, has small welding area, rarely uses flux, and cannot cause the cooling liquid to generate a large number of conductive ions, reduces flow channel corrosion, is suitable for a high-pressure liquid cooling energy storage system, reduces assembly space and simplifies the structure of parts, and thus improves the reliability of liquid cooling plate assembly.

[0041] In combination Figures 1 to 5 As shown, the utility model embodiment further provides a lower box 100, including the liquid cooling plate 10 of the above embodiment, the bottom frame 20 and the support beam 13, the bottom frame 20 is arranged below the liquid cooling plate 10, and the number of support beams 13 is multiple and is arranged above the liquid cooling plate 10. The support beam 13 is used to fix the battery cell module, and the specific type is set according to actual needs. For example, the support beam 13 adopts a hollow structure to realize lightweight. The bottom frame 20 adopts lightweight design, ensures that the overall strength of the liquid cooling battery pack meets the different scene requirements of transportation, hoisting and operation, reduces the weight, and optimizes the cost.

[0042] In some embodiments, in combination Figures 3 to 5 As shown, the bottom frame 20 includes an outer frame 21 and an inner frame 22, the inner frame 22 is arranged in the outer frame 21, and the inner frame 22 is connected with the outer frame 21. The outer frame 21 and the inner frame 22 form a stable frame structure and can bear a large weight.

[0043] The outer frame 21 includes a pair of first cross beams 211 and a pair of first longitudinal beams 212 connected together, the inner frame 22 includes a pair of second longitudinal beams 221, a pair of second cross beams 222, a plurality of third cross beams 224 and a plurality of third longitudinal beams 223, the second longitudinal beams 221 and the second cross beams 222 are connected end to end, the plurality of third cross beams 224 and the plurality of third longitudinal beams 223 are cross arranged, the two ends of the third cross beam 224 are connected with the first cross beam 211, and the third longitudinal beam 223 is located above the third cross beam 224. The first cross beam 211, the first longitudinal beam 212, the second longitudinal beam 221 and the second cross beam 222 are formed into a tubular shape by bending sheet metal.

[0044] Compared with other forms of lower box, the lower box of the embodiment is formed by bending sheet metal into a fitting, is simple to process, is lighter in weight, and has more advantages in cost.

[0045] In one example, the third longitudinal beam 223 is a square tube, which strengthens the strength in the first direction and better supports the battery cell module. The first transverse beam 211 and the second transverse beam 222 are provided with a plurality of protrusions 213, which can limit the first current collecting pipe 122 and the second current collecting pipe 121.

[0046] In combination with Figure 6 , Figure 7 The utility model discloses an embodiment further provides a liquid cooling battery pack, including the lower box body 100 of above -mentioned embodiment, the battery cell module 200 and the upper box body 300, the battery cell module 200 is connected at the upper of lower box body, and the upper box body 300 is connected with the edge of lower box body, and the battery cell module 200 is enclosed.

[0047] The liquid cooling battery pack of the embodiment utilizes the liquid circulating in the liquid cooling plate to control temperature, so that the operating temperature of the battery cell is consistent, which is beneficial to prolong the service life of the battery cell

[0048] In addition, the liquid cooling battery pack further includes a panel module 400 and an ear 500. The upper box body 300 is provided with an opening 301, and the panel module 400 is nested in the opening 301, so as to realize an aesthetic and tidy appearance. The ear is arranged at the edge of the upper box body 300, so that the liquid cooling battery pack can be conveniently hoisted, moved and positioned by using a hoisting device.

[0049] It should be noted that, in the description of the utility model, the terms "first", "second" and the like are only used for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, in the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0050] In the utility model, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise specified. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0051] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0052] In the description of the present application, the terms "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation of the present application.

[0053] Any process or method descriptions in flow charts or otherwise described herein can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for implementing specific logic functions or other processes, and the various embodiments of the present application include additional implementations in which the order of execution is different, in which other code modules are utilized, in which not all code modules are utilized, in which code modules are utilized in combination with one another, and in which other structures and methods of implementation are utilized, all of which are within the scope of the present application.

[0054] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A liquid-cooled plate, characterized in that, Comprising: A liquid-cooling cover plate (11); A flow channel assembly (12), the flow channel assembly (12) being provided under the liquid-cooling cover plate (11), the flow channel assembly (12) including a first manifold (122), a second manifold (121) and multiple corrugated tubes (123), multiple piercing flanging holes being provided on the side walls of the first manifold (122) and the second manifold (121), and both ends of the multiple corrugated tubes (123) extending into the piercing flanging holes and being welded thereto to connect the first manifold (122) and the second manifold (121); An inlet pipe (14) and an outlet pipe (15), being connected to the first manifold (122).

2. The liquid cooling plate according to claim 1, characterized in that, The cross-sections of the first manifold (122) and the second manifold (121) are "day"-shaped.

3. The liquid cooling plate according to claim 2, characterized in that, The multiple corrugated tubes (123) are divided into 4 groups of pipelines along a first direction, namely the 1st to 4th groups of pipelines, each group of pipelines including at least one corrugated tube (123), the middle part of the upper half of the "day"-shape of the first manifold (122) being partitioned, and the middle part of the lower half of the "day"-shape of the second manifold (121) being partitioned.

4. The liquid cooling plate according to claim 3, characterized in that, The inlet pipe (14) and the outlet pipe (15) are connected to the upper half of the "day"-shape of the first manifold (122); the front ends of the 1st group of pipelines and the 4th group of pipelines are connected to the upper half of the "day"-shape of the first manifold (122), the front ends of the 2nd to 3rd groups of pipelines are connected to the lower half of the "day"-shape of the first manifold (122); the rear ends of the 1st to 4th groups of pipelines are connected to the lower half of the "day"-shape of the second manifold (121).

5. A lower housing, characterized in that, Including the liquid-cooling plate (10) as described in any one of claims 1 to 4, a bottom frame (20) and support beams (13), the bottom frame (20) being provided under the liquid-cooling plate (10), and the number of the support beams (13) being multiple, and being provided above the liquid-cooling plate (10).

6. The lower housing according to claim 5, characterized in that, The bottom frame (20) includes an outer frame (21) and an inner frame (22), the inner frame (22) being provided inside the outer frame (21), and the inner frame (22) being connected to the outer frame (21).

7. The lower housing according to claim 6, characterized in that, The outer frame (21) includes a pair of first cross beams (211) and a pair of first longitudinal beams (212) connected together, the inner frame (22) includes a pair of second longitudinal beams (221), a pair of second cross beams (222), multiple third cross beams (224) and multiple third longitudinal beams (223), the second longitudinal beams (221) and the second cross beams (222) being connected end to end, the multiple third cross beams (224) and the multiple third longitudinal beams (223) being arranged in a cross manner, both ends of the third cross beams (224) being connected to the first cross beams (211), the third longitudinal beams (223) being located above the third cross beams (224), and the first cross beams (211), the first longitudinal beams (212), the second longitudinal beams (221) and the second cross beams (222) being formed into a tubular shape by sheet metal bending.

8. The lower housing according to claim 7, characterized in that, The third longitudinal beam (223) is a square tube, and the first crossbeam (211) and the second crossbeam (222) are provided with a plurality of protrusions (213).

9. A liquid-cooled battery pack, characterized in that, The device includes a lower housing, a battery cell module (200), and an upper cover (300) as described in any one of claims 5 to 8, wherein the battery cell module (200) is connected above the lower housing, and the upper cover (300) is connected to the edge of the lower housing to enclose the battery cell module (200).

10. The liquid-cooled battery pack according to claim 9, characterized in that, It also includes a panel module (400), the upper cover (300) has an opening (301), and the panel module (400) is nested in the opening (301).

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