CN114204160B

CN114204160B - Liquid cooling battery box

Info

Publication number: CN114204160B
Application number: CN202111409061.XA
Authority: CN
Inventors: 宋太纪; 陈志强; 崔晓爽
Original assignee: Huaneng International Engineering Technology Co ltd
Current assignee: Huaneng International Engineering Technology Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2023-02-10
Anticipated expiration: 2041-11-24
Also published as: GB202204826D0; GB2613212A; CN114204160A

Abstract

The invention relates to the technical field of battery energy storage systems, in particular to a liquid-cooled battery box. The liquid cooling battery box comprises a box body, a heat transfer sleeve and a battery; the box body is provided with a liquid inlet for injecting cooling liquid and a liquid outlet for discharging the cooling liquid, the top of the box body is provided with a mounting hole, the heat transfer sleeve is embedded in the mounting hole, and the heat transfer sleeve is in sealing fit with the mounting hole; the heat transfer sleeve extends into the box body, the battery is placed in the heat transfer sleeve, and the heat transfer sleeve is in contact fit with the battery. The liquid cooling battery box that this embodiment provided has heat transfer area great, technical advantage such as heat exchange efficiency is higher.

Description

Liquid cooling battery box

Technical Field

The invention relates to the technical field of battery energy storage systems, in particular to a liquid-cooled battery box.

Background

At present, the mainstream cooling mode of the battery energy storage system at home and abroad is air cooling, namely, air conditioning equipment is used for cooling or heating the battery and the battery box so as to enable the battery to work in a temperature range of 15-35 ℃ all the time.

The air cooling mode based on the air conditioner has the defects of uneven cooling, high energy consumption, high failure rate and the like, and is being replaced by a liquid cooling mode; however, in the conventional liquid-cooled battery box, the contact area between the battery and the cooling liquid is too small, so that the heat transfer efficiency is low.

In summary, how to overcome the above-mentioned defects of the existing liquid-cooled battery box is a technical problem that needs to be solved urgently by those skilled in the art.

Disclosure of Invention

The invention aims to provide a liquid-cooled battery box to solve the technical problems of low heat transfer efficiency and poor safety of the liquid-cooled battery box in the prior art.

The invention provides a liquid-cooled battery box which comprises a box body and a heat transfer sleeve.

The box body is provided with a liquid inlet for injecting cooling liquid and a liquid outlet for discharging the cooling liquid, the top of the box body is provided with a mounting hole, the heat transfer sleeve is embedded in the mounting hole, and the heat transfer sleeve is in sealing fit with the mounting hole;

the heat transfer sleeve extends into the box body, a battery is placed in the heat transfer sleeve, and the heat transfer sleeve is in contact fit with the battery.

Preferably, as an implementation mode, at least part of the heat transfer sleeve protrudes out of the top surface of the box body, and/or the electrode of the battery is positioned at the top of the battery.

Preferably, as an implementation manner, the liquid inlet is formed on a first side wall of the box body, the liquid outlet is formed on a second side wall of the box body, and the first side wall and the second side wall are opposite to each other.

Preferably, as an implementation mode, the liquid inlet is close to the bottom of the box body, and the liquid outlet is close to the top of the box body.

Preferably, as an implementation mode, the liquid inlet is located at a middle position of the first side wall and the liquid outlet is located at a middle position of the second side wall in a direction parallel to the bottom surface of the box body.

Preferably, as an implementation mode, a first transverse flow guiding plate is arranged inside the box body, the first transverse flow guiding plate is close to the first side box wall, and the first transverse flow guiding plate is parallel to the first side box wall;

and/or a second transverse guide plate is arranged on the inner side of the bottom of the box body, the second transverse guide plate is close to the second side box wall, and the second transverse guide plate is parallel to the second side box wall;

and/or a longitudinal flow guide plate is arranged in the box body, and the longitudinal flow guide plate extends from the first side box wall to the second side box wall.

Preferably, as an implementation mode, the first transverse baffle is connected to the bottom of the box body, and a gap exists between the first transverse baffle and the top of the box body;

and/or the second transverse baffle is arranged at the bottom of the box body, and a gap exists between the second transverse baffle and the top of the box body;

and/or the longitudinal guide plate is connected to the middle position of the top of the box body, and a gap exists between the longitudinal guide plate and the bottom of the box body.

Preferably, as an implementation mode, a first temperature measuring element and a second temperature measuring element are installed in the box body, the first temperature measuring element is close to the liquid inlet, the second temperature measuring element is close to the liquid outlet, and the first temperature measuring element and the second temperature measuring element are used for being connected with a testing system.

Preferably, as an embodiment, the bottom surface of the battery abuts against the heat transfer jacket, and the side wall of the battery is in clearance fit with the heat transfer jacket.

Preferably, as an implementable mode, the box includes the case lid and the uncovered body in top that sets up, the case lid closes the uncovered department in top of body, the mounting hole is seted up on the case lid, just the case lid with the connection can be dismantled to the body.

Compared with the prior art, the invention has the advantages that:

according to the liquid-cooled battery box provided by the invention, when the battery heats, the heat generated by the battery can be transferred to the heat transfer sleeve contacted with the battery; simultaneously, the low-temperature coolant entering the box body from the liquid inlet can take away the heat on the heat transfer sleeve and is discharged from the liquid outlet after absorbing the heat and raising the temperature, so that the cooling effect on the battery can be realized.

It should be noted that the heat transfer sleeve extends into the box body, so that the cooling liquid injected into the box body can surround the heat transfer sleeve, and the battery is arranged in the heat transfer sleeve and is in contact fit with the heat transfer sleeve, so that the cooling liquid in the box body also surrounds the battery, the contact area of the cooling liquid and the battery is indirectly increased, the heat exchange area is increased, and the heat exchange efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is an exploded view of a liquid-cooled battery box according to an embodiment of the present invention;

FIG. 2 is an exploded view of a liquid-cooled battery box according to another aspect of the present invention;

FIG. 3 is a cross-sectional view of a liquid-cooled battery box according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of another view of a liquid-cooled battery box according to an embodiment of the present invention.

Icon:

100-a box body; 110-a body; 111-a liquid inlet; 112-a liquid outlet; 120-a box cover; 130-a first transverse baffle; 140-a second transverse baffle; 150-longitudinal baffles;

200-a heat transfer jacket;

300-a battery; 310-electrode.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

Referring to fig. 1 to 4, the present embodiment provides a liquid-cooled battery box including a box body 100, a heat transfer jacket 200, and a battery 300; a liquid inlet 111 for injecting cooling liquid and a liquid outlet 112 for discharging the cooling liquid are formed in the box body 100, a mounting hole is formed in the top of the box body 100, the heat transfer sleeve 200 is embedded in the mounting hole, and the heat transfer sleeve 200 is in sealing fit with the mounting hole; the heat transfer jacket 200 extends into the case 100, the battery 300 is placed in the heat transfer jacket 200, and the heat transfer jacket 200 is in contact fit with the battery 300.

In the liquid-cooled battery box provided by the embodiment, when the battery 300 generates heat, the heat generated by the battery 300 is transferred to the heat transfer sleeve 200 in contact with the battery; meanwhile, the low-temperature cooling liquid entering the box 100 through the liquid inlet 111 can take away the heat on the heat transfer sleeve 200, and the low-temperature cooling liquid is discharged through the liquid outlet 112 after absorbing the heat and increasing the temperature, so that the cooling effect on the battery 300 can be realized.

It should be noted that, the heat transfer jacket 200 extends into the box body 100, so that the cooling liquid injected into the box body 100 can surround the heat transfer jacket 200, and the battery 300 is installed in the heat transfer jacket 200, and the battery 300 is in contact fit with the heat transfer jacket 200, so that the cooling liquid in the box body 100 also surrounds the battery 300, thereby indirectly increasing the contact area between the cooling liquid and the battery 300, that is, increasing the heat exchange area, not only improving the heat exchange efficiency, but also cooling the battery 300 more uniformly.

Preferably, referring to fig. 3 and 4, the heat transfer jacket 200 is at least partially protruded from the top surface of the case 100, and when a slight leakage occurs at a sealing surface between the heat transfer jacket 200 and the mounting hole or other sealing surfaces, the cooling liquid is less likely to enter the heat transfer jacket 200 because the cooling liquid flows downward under the action of gravity, so that the battery 300 in the heat transfer jacket 200 is less likely to contact the cooling liquid, and thus, the battery 300 is less likely to be short-circuited, and the safety is high.

Further, the electrode 310 of the battery 300 may be disposed on the top of the battery 300, so that even if the cooling liquid enters the heat transfer jacket 200, the electrode is not easily soaked, the risk of short circuit of the battery 200 may be further reduced, and the safety may be higher.

Preferably, referring to fig. 1 to 3, the liquid inlet 111 and the liquid outlet 112 are respectively formed on two opposite side walls of the box 100, so that the cooling liquid injected through the liquid inlet 111 can be discharged through the opposite liquid outlet 112 after traversing the whole box 100, thereby facilitating the contact between the cooling liquid and the heat transfer jacket 200 and improving the heat exchange efficiency.

Specifically, the side wall of the box 100 with the liquid inlet 111 is defined as a first side wall, and the side wall of the box 100 with the liquid outlet 112 is defined as a second side wall, that is, the first side wall and the second side wall are disposed opposite to each other.

Preferably, referring to fig. 3, the liquid inlet 111 is disposed at a position of the first sidewall near the bottom of the box 100, and the liquid outlet 112 is disposed at a position of the second sidewall near the top of the box 100, so that the cooling liquid can flow vertically from bottom to top in the box 100 to a certain extent, and thus, the contact sufficiency of the cooling liquid with the heat transfer jacket 200 can be further improved, and the heat exchange efficiency is higher.

Further, referring to fig. 1, the inlet port 111 may be provided at an intermediate position of the first side case wall in a direction parallel to the bottom surface of the case 100, so that the cooling liquid is more sufficiently in contact with the heat transfer jacket 200; similarly, referring to fig. 2, the outlet 112 may be disposed at an intermediate position of the second sidewall wall to allow the coolant to contact the heat transfer jacket 200 more fully.

Further, can set up first horizontal guide plate 130 in the inside of box 100, be close to first lateral box wall with first horizontal guide plate 130 and set up first horizontal guide plate 130 to be parallel with first lateral box wall, the coolant liquid that is injected by inlet 111 alright flow toward both sides along first horizontal guide plate 130, just can converge the heat transfer region afterwards and contact with heat transfer jacket 200, after converging the heat transfer region, partial coolant liquid still can flow toward the centre along first horizontal guide plate 130, partial coolant liquid then can directly flow towards second lateral box wall in addition, so, coolant liquid is close to one side of inlet 111 in box 100, alright formation microcirculation, be convenient for further improve the contact sufficiency of coolant liquid and heat transfer jacket 200.

Specifically, the first transverse baffle 130 may be connected to the bottom of the box 100, so that the first transverse baffle 130 is used as a reinforcing rib at the bottom of the box 100 to improve the structural strength at the bottom of the box 100; meanwhile, a gap is formed between the first transverse flow guide plate 130 and the top of the box body 100, so that the cooling liquid injected from the liquid inlet 111 can partially flow to the heat exchange area through the gap between the first transverse flow guide plate 130 and the top of the box body 100, the contact uniformity of the cooling liquid and the heat transfer sleeve 200 is improved, and the cooling effect uniformity of the batteries in different areas is improved.

Correspondingly, a second transverse flow guiding plate 140 may be disposed inside the box 100, the second transverse flow guiding plate 140 is disposed near the second sidewall wall, and the second transverse flow guiding plate 140 is disposed parallel to the second sidewall wall, so that after the cooling liquid in the heat exchange region contacts with the heat transfer jacket 200 for heat exchange, a part of the cooling liquid may flow along the second transverse flow guiding plate 140 toward both ends, and then enter the channel between the second transverse flow guiding plate 140 and the second sidewall wall from both ends of the second transverse flow guiding plate 140, and a part of the cooling liquid may directly enter the channel between the second transverse flow guiding plate 140 and the second sidewall from both ends of the second transverse flow guiding plate 140, and finally, the cooling liquid entering the channel between the second transverse flow guiding plate 140 and the second sidewall wall may flow toward the liquid outlet along the second transverse flow guiding plate 140 and be discharged from the liquid outlet 112, so that the cooling liquid on the side of the box 100 near the liquid outlet 112 may also form a micro-cycle, thereby further improving contact sufficiency of the cooling liquid and the heat transfer jacket 200.

Specifically, the second transverse baffle 140 may be connected to the bottom of the box 100, so that the second transverse baffle 140 is used as a reinforcing rib at the bottom of the box 100, thereby further improving the structural strength at the bottom of the box 100; meanwhile, a gap is formed between the second transverse flow guide plate 140 and the top of the box 100, so that the coolant in the heat exchange region can partially flow to the channel between the second transverse flow guide plate 140 and the second side box wall through the gap between the second transverse flow guide plate 140 and the top of the box 100, the contact uniformity of the coolant and the heat transfer sleeve 200 is further improved, and the uniformity of the cooling effect of the batteries 300 in different regions is improved.

The first and second

lateral baffles

130, 140 may be integrally formed with the bottom of the enclosure 100.

In addition, referring to fig. 4, a longitudinal flow guiding plate 150 may be further disposed inside the box 100, and the longitudinal flow guiding plate 150 is extended from the first sidewall to the second sidewall, so that the cooling liquid entering the heat exchanging region may flow toward the liquid outlet 112 along the longitudinal flow guiding plate 150, which may make each battery 300 heated more uniformly, and meanwhile, the first transverse flow guiding plate 130 and the second transverse flow guiding plate 140 may cooperate to form a micro-circulation in the heat exchanging region, which further improves the contact sufficiency between the cooling liquid and the heat transfer jacket 200.

The longitudinal guide plate 150 may be an integrally formed structure with the top of the cabinet 100.

Specifically, the longitudinal baffle 150 may be connected to the middle position of the top of the box body 100, so that the longitudinal baffle 150 is used as a reinforcing rib at the top of the box body 100 to improve the structural strength at the top of the box body 100; meanwhile, a gap is provided between the longitudinal flow guide plate 150 and the bottom of the case 100, so that the cooling liquids at both sides of the longitudinal flow guide plate 150 can be in contact with each other for exchange, which is convenient for improving the distribution uniformity and temperature uniformity of the cooling liquid in the heat exchange region, and further, the cooling uniformity of each battery 300 is improved.

A first temperature measuring element and a second temperature measuring element can be installed in the box body 100, the first temperature measuring element is arranged at a position close to the liquid inlet 111, and the temperature of the cooling liquid near the liquid inlet 111 is detected by the first temperature measuring element; the second temperature measuring element is arranged at a position close to the liquid outlet 112 so as to detect the temperature of the cooling liquid near the liquid outlet 112 by using the second temperature measuring element, and the first temperature measuring element and the second temperature measuring element are both connected to the test system, so that the distribution of the temperature field in the box body 100 can be reflected or calculated according to the temperatures of the liquid inlet 111 and the liquid outlet 112.

The bottom surface of the battery 300 is abutted against the heat transfer sleeve 200, and the side wall of the battery 300 is in clearance fit with the heat transfer sleeve 200, so that the heat exchange effect of the battery 300 and the heat transfer sleeve 200 can be ensured, and the gap between the battery 300 and the side wall and the heat transfer sleeve 200 is convenient for the installation of the battery 300.

Specifically, the range of the gap between the side wall of the battery 300 and the heat transfer jacket 200 is set to 0.2-0.4mm, preferably 0.2mm, which can ensure both the convenience of installation and the heat exchange effect between the battery 300 and the heat transfer jacket 200.

The box body 100 specifically comprises a box cover 120 and a body 110 with an open top, the box cover 120 is covered on the open top of the body 110, a mounting hole is formed in the box cover 120, and the box cover 120 is detachably connected with the body 110, namely, the box cover 120 and the body 110 are of a split structure and can be processed respectively, the processing difficulty is low, the processing cost is convenient to reduce, and when one of the box cover 120 or the body 110 is damaged, the damaged part can be replaced independently, so that the maintenance cost can be reduced; in addition, the cover 120 may be opened to facilitate cleaning of the inside of the case 100.

Specifically, a flange may be disposed at the top of the body 110, the cover 120 may be connected to the top flange of the body 110 through a first threaded connection, and a first sealing gasket may be disposed between the cover 120 and the top flange of the body 110, so that the connection reliability is high, the sealing performance between the cover 120 and the body 110 is maintained well, the coolant is prevented from leaking from the connection between the cover 120 and the body 110, the outside of the box 100 is not easily contacted with the cooling water, and insulation and drying are ensured.

Correspondingly, a flanging can be arranged on the top edge of the heat transfer sleeve 200, the flanging on the top of the heat transfer sleeve 200 is connected with the box cover 120 through a second threaded connecting piece, and a second sealing gasket is arranged between the flanging of the heat transfer sleeve 200 and the box cover 120, so that the connection reliability is good, the good sealing performance between the heat transfer sleeve 200 and the mounting hole is convenient to maintain, the leakage of cooling liquid from the joint of the heat transfer sleeve 200 and the mounting hole is prevented, the outside of the box body 100 is not easy to contact with cooling water, and the insulation and the drying are ensured.

The cooling liquid can be desalted water or other heat-absorbing liquid, and the desalted water is selected, so that no water scale and impurities are generated in the long-term 10-35 ℃ operation temperature range, and the maintenance is free.

The box body 100 can be made of heat-resistant plastic, can effectively insulate heat from the environment, is made of thick materials, is not easy to deform and is easy to shape and machine.

Similarly, the heat transfer sleeve 200 can be made of aluminum, and has high heat transfer coefficient, low cost and difficult damage.

In summary, the present invention discloses a liquid-cooled battery box, which overcomes many technical defects of the conventional liquid-cooled battery box. The liquid cooling battery box that this embodiment provided has heat transfer area great, technical advantage such as heat exchange efficiency is higher.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid cooling battery box is characterized by comprising a box body (100) and a heat transfer sleeve (200);

a liquid inlet (111) for injecting cooling liquid and a liquid outlet (112) for discharging the cooling liquid are formed in the box body (100), a mounting hole is formed in the top of the box body (100), the heat transfer sleeve (200) is embedded in the mounting hole, and the heat transfer sleeve (200) is in sealing fit with the mounting hole;

the heat transfer sleeve (200) extends into the box body (100), a battery (300) is placed in the heat transfer sleeve (200), and the heat transfer sleeve (200) is in contact fit with the battery (300);

the box body (100) comprises a box cover (120) and a body (110) with an open top, the box cover (120) covers the open top of the body (110), the mounting hole is formed in the box cover (120), and the box cover (120) is detachably connected with the body (110);

the top of the body (110) is provided with a flanging, and the box cover (120) is connected with the flanging at the top of the body (110) through a first threaded connecting piece;

the top edge of the heat transfer sleeve (200) is provided with a flanging, and the top flanging of the heat transfer sleeve (200) is connected with the box cover (120) through a second threaded connecting piece.

2. The liquid-cooled battery box of claim 1, wherein at least a portion of the heat transfer jacket (200) protrudes above a top surface of the box (100) and/or wherein the electrodes (310) of the battery (300) are located on top of the battery (300).

3. A liquid-cooled battery box according to claim 1, characterized in that the liquid inlet (111) opens in a first side wall of the box (100) and the liquid outlet (112) opens in a second side wall of the box (100), the first side wall being opposite to the second side wall.

4. The liquid-cooled battery box of claim 3, wherein said inlet (111) is proximate a bottom of said box (100) and said outlet (112) is proximate a top of said box (100).

5. A liquid-cooled battery box according to claim 3, characterized in that said inlet (111) is located in a middle position of said first side wall and said outlet (112) is located in a middle position of said second side wall in a direction parallel to the bottom surface of said box (100).

6. A liquid-cooled battery box according to any of claims 3 to 5, characterised in that the interior of the box (100) is provided with a first transverse baffle (130), the first transverse baffle (130) being adjacent the first side wall and the first transverse baffle (130) being parallel to the first side wall;

and/or a second transverse flow guide plate (140) is arranged on the inner side of the bottom of the box body (100), the second transverse flow guide plate (140) is close to the second side box wall, and the second transverse flow guide plate (140) is parallel to the second side box wall;

and/or a longitudinal flow guide plate (150) is arranged inside the box body (100), and the longitudinal flow guide plate (150) extends from the first side box wall to the second side box wall.

7. The liquid-cooled battery box of claim 6, wherein said first lateral baffle (130) is attached to a bottom of said enclosure (100) and wherein said first lateral baffle (130) is spaced from a top of said enclosure (100);

and/or the second transverse baffle (140) is arranged at the bottom of the box body (100), and a gap exists between the second transverse baffle (140) and the top of the box body (100);

and/or the longitudinal flow guide plate (150) is connected to the middle position of the top of the box body (100), and a gap exists between the longitudinal flow guide plate (150) and the bottom of the box body (100).

8. The liquid-cooled battery box of any of claims 1-5, wherein a first temperature measuring element and a second temperature measuring element are installed in the box body (100), the first temperature measuring element is close to the liquid inlet (111), the second temperature measuring element is close to the liquid outlet (112), and the first temperature measuring element and the second temperature measuring element are used for connecting a testing system.

9. The liquid-cooled battery box according to any of claims 1-5, characterized in that the bottom surface of the battery (300) abuts against the heat transfer jacket (200), and the side walls of the battery (300) are clearance-fitted to the heat transfer jacket (200).