Assembled liquid cooling box body and energy storage equipment

Abstract

The utility model discloses an assembly type liquid cooling box body and energy storage equipment, and relates to the technical field of energy storage equipment, the assembly type liquid cooling box body comprises a liquid cooling plate assembly, the liquid cooling plate assembly comprises a first plate and a second plate, one of the first plate and the second plate is provided with a spiral liquid cooling groove, and the other one covers the liquid cooling groove. A cooling liquid inlet is formed in the inner end of the liquid cooling flow channel, and a cooling liquid outlet is formed in the outer end of the liquid cooling flow channel. According to the assembled liquid cooling box body and the energy storage equipment, the heat dissipation effect can be improved, and the temperature control effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, in particular to an assembled liquid cooling box and energy storage equipment. Background Art

[0002] A large amount of heat is generated during the operation of energy storage equipment. Excessive temperature can cause damage to the energy storage equipment or even explosion. Therefore, the energy storage equipment needs to be cooled. Liquid cooling is one of the better cooling methods, with better heat dissipation effect and better temperature control effect.

[0003] The liquid cooling box is a common liquid cooling device. The inner cavity of the liquid cooling box is used to accommodate the battery module. The liquid cooling box is provided with a liquid cooling plate, and the liquid cooling plate is provided with a liquid cooling channel. In the prior art, the liquid cooling channel is generally S-shaped, and the two ends of the liquid cooling channel are provided with a coolant inlet and an outlet. Since the liquid cooling channel is bent 180 degrees at multiple locations, the coolant needs to go through multiple turns when flowing, and the resistance is large, resulting in a large pressure head loss, which reduces the heat dissipation and temperature control effects. In addition, the existing liquid cooling plate cannot focus on the heat collection area near the middle of the battery module to dissipate heat, which further reduces the heat dissipation and temperature control effects. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an assembled liquid cooling box, which can improve the heat dissipation effect and thus improve the temperature control effect.

[0005] The utility model also provides an energy storage device having the above-mentioned assembled liquid cooling box.

[0006] According to the first aspect of the utility model, the assembled liquid cooling box includes a liquid cooling plate assembly, which includes a first plate and a second plate, one of the first plate and the second plate is provided with a spiral liquid cooling groove, and the other covers the liquid cooling groove to form a spiral liquid cooling channel, the inner end of the liquid cooling channel is provided with a cooling liquid inlet, and the outer end of the liquid cooling channel is provided with a cooling liquid outlet.

[0007] The assembled liquid cooling box according to the embodiment of the utility model has at least the following beneficial effects:

[0008] In the present invention, the liquid cooling plate assembly can be attached to the battery module, and the coolant enters from the coolant inlet at the inner end of the liquid cooling channel, that is, from the position close to the center of the liquid cooling channel, flows through the entire liquid cooling channel, and flows out from the coolant outlet at the outer end of the liquid cooling channel. During the flow of the coolant, the heat generated by the battery module can be absorbed, thereby achieving heat dissipation and temperature control. According to the assembled liquid cooling box of the embodiment of the present invention, the formed liquid cooling channel is spiral, and the flow direction of the coolant is roughly the circumferential direction, so that the resistance encountered by the coolant when flowing is small, and the pressure head loss is small, so that the heat dissipation and temperature control effect are better, and the coolant enters from the position close to the center of the liquid cooling channel, and the coolant with the lowest temperature just entering just dissipates the heat accumulation area near the middle of the battery module, so that the heat dissipation and temperature control effect are better. In addition, the liquid cooling plate assembly is assembled by the first plate and the second plate, and the liquid cooling channel is formed by the first plate and the second plate. Compared with directly processing the liquid cooling channel in the liquid cooling plate, the processing is more convenient, and it is also more convenient to clean the liquid cooling channel.

[0009] According to some embodiments of the present invention, the liquid cooling groove is formed by punching a surface of the first plate close to the second plate; or, the liquid cooling groove is formed by punching a surface of the second plate close to the first plate.

[0010] According to some embodiments of the utility model, the liquid cooling groove forms a plurality of mutually parallel first grooves and a plurality of mutually parallel second grooves along its own extension direction, the extension direction of the first groove forms an angle with the extension direction of the second groove, and an arc groove is formed between the first groove and the adjacent second groove.

[0011] According to some embodiments of the present invention, an annular sealing strip is provided between the edge of the first plate and the edge of the second plate.

[0012] According to some embodiments of the present invention, a surface of the second plate facing away from the first plate forms a contact surface, and the contact surface is used to contact the battery cell module. The first plate is set to be a stainless steel plate, and the second plate is set to be an aluminum plate.

[0013] According to some embodiments of the utility model, the assembled liquid cooling box body also includes a box cover, the box cover is provided with an opening, the box cover is provided with a flange on the surrounding side of the opening, fasteners are installed between the flange and the first plate, the second plate is clamped between the box cover and the first plate, and a accommodating cavity is formed between the box cover and the second plate, and the accommodating cavity is used to accommodate the battery cell module.

[0014] According to some embodiments of the present utility model, a limiting groove is provided on the surface of the first plate close to the second plate, and the second plate is cooperatively arranged in the limiting groove.

[0015] According to some embodiments of the present invention, the liquid cooling tank includes an inner tank section and an outer tank section, the outer tank section surrounds the outer side of the inner tank section, and the width dimension of the outer tank section is greater than the width dimension of the inner tank section.

[0016] According to some embodiments of the utility model, a plurality of guide parts are provided in the outer groove section, and the plurality of guide parts are arranged along the extension direction of the outer groove section, and the two ends of the guide parts along the extension direction of the outer groove section are set to be convex arcs.

[0017] The energy storage device according to the second embodiment of the utility model includes the assembled liquid cooling box body described in the first embodiment.

[0018] The energy storage device according to the embodiment of the utility model has at least the following beneficial effects:

[0019] By adopting the assembled liquid cooling box of the first aspect of the utility model, the formed liquid cooling channel is spiral, so that the flow direction of the coolant is basically consistent, so that the coolant encounters less resistance when flowing, and the pressure head loss is smaller, thereby making the heat dissipation and temperature control effects better, and the coolant enters from a position close to the center of the liquid cooling channel, and the coolant with the lowest temperature that has just entered just dissipates the heat in the heat collection area near the middle of the battery cell module, thereby making the heat dissipation and temperature control effects better. In addition, the liquid cooling plate assembly is assembled from the first plate and the second plate, and the liquid cooling channel is formed by the first plate and the second plate. Compared with directly processing the liquid cooling channel in the liquid cooling plate, the processing is more convenient, and it is also more convenient to clean the liquid cooling channel.

[0020] Additional aspects and advantages of the present invention will be partially given in the following description, and some advantages will become apparent from the following description or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a schematic structural diagram of an assembled liquid cooling box according to an embodiment of the utility model;

[0023] Figure 2 for Figure 1 Explosion diagram of

[0024] Figure 3 for Figure 2 Schematic diagram of assembly of the first plate and the second plate;

[0025] Figure 4 for Figure 2 Schematic diagram of the structure of the first plate.

[0026] Figure Number:

[0027] Liquid cooling plate assembly 100; first plate 101; second plate 102; liquid cooling groove 103; cooling liquid inlet 104; cooling liquid outlet 105; first groove 106; second groove 107; arc groove 108; contact surface 109; limiting groove 110; inner groove section 111; outer groove section 112; guide portion 113;

[0028] Box cover 200; flange 201. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, "a plurality" refers to two or more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] With the advancement of lithium battery technology, energy storage equipment has also developed rapidly, with an increasingly high degree of integration. A large amount of heat is generated during the operation of energy storage equipment. Excessive temperature can cause damage to the energy storage equipment or even explosion. Therefore, the energy storage equipment needs to be cooled. The traditional air cooling method has low heat transfer efficiency, poor heat dissipation effect, and poor temperature control effect due to the small specific heat capacity of air and the small convection heat transfer coefficient. It is gradually being eliminated. The liquid cooling method has been increasingly widely used due to its high heat dissipation efficiency and more precise temperature control.

[0034] The liquid cooling box is a common liquid cooling device. The inner cavity of the liquid cooling box is used to accommodate the battery module. The liquid cooling box is provided with a liquid cooling plate. The liquid cooling plate is generally provided at the bottom of the liquid cooling box. The battery module is attached to the top surface of the liquid cooling plate. The liquid cooling plate is provided with a liquid cooling channel. In the prior art, the liquid cooling channel is generally S-shaped, and the two ends of the liquid cooling channel are provided with a coolant inlet and an outlet. Since the liquid cooling channel is bent 180 degrees at multiple locations, the coolant needs to be turned back multiple times when flowing, and the resistance is large, resulting in a large pressure head loss, thereby reducing the heat dissipation and temperature control effects. In addition, the existing liquid cooling plate cannot focus on the heat collection area near the middle of the battery module to dissipate heat, thereby further reducing the heat dissipation and temperature control effects.

[0035] To this end, the utility model proposes an assembled liquid cooling box and energy storage equipment, which can effectively improve the above-mentioned problems.

[0036] Reference below Figures 1 to 4 An assembled liquid cooling box and an energy storage device according to an embodiment of the utility model are described.

[0037] According to the assembled liquid cooling box of the first aspect of the utility model, Figures 1 to 4 As shown, the liquid cooling plate assembly 100 includes a first plate 101 and a second plate 102, one of the first plate 101 and the second plate 102 is provided with a spiral liquid cooling groove 103, and the other covers the liquid cooling groove 103 to form a spiral liquid cooling channel, the inner end of the liquid cooling channel is provided with a cooling liquid inlet 104, the cooling liquid inlet 104 can be connected to a liquid inlet pipe, and the outer end of the liquid cooling channel is provided with a cooling liquid outlet 105, and the cooling liquid outlet 105 can be connected to a liquid outlet pipe.

[0038] In the utility model, the liquid cooling plate assembly 100 can be arranged at the bottom end of the assembled liquid cooling box body. The inner cavity of the assembled liquid cooling box body is used to accommodate the battery cell module. The battery cell module can be attached to the top surface of the liquid cooling plate assembly 100. The coolant enters from the coolant inlet 104 at the inner end of the liquid cooling channel, that is, enters from a position close to the center of the liquid cooling channel. After flowing through the entire liquid cooling channel, it flows out from the coolant outlet 105 at the outer end of the liquid cooling channel. During the flow of the coolant, the heat generated by the battery cell module can be absorbed, thereby achieving heat dissipation.

[0039] According to the assembled liquid cooling box of the embodiment of the utility model, the formed liquid cooling flow channel is spiral, and the flow direction of the coolant is roughly the circumferential direction, so the coolant encounters less resistance when flowing, and the pressure head loss is smaller, thereby making the heat dissipation and temperature control effects better, and the coolant enters from a position close to the center of the liquid cooling flow channel, and the coolant with the lowest temperature that has just entered just dissipates the heat in the heat collection area near the middle of the battery cell module, thereby making the heat dissipation and temperature control effects better. In addition, the liquid cooling plate assembly 100 is assembled from the first plate 101 and the second plate 102, and the liquid cooling flow channel is formed by the first plate 101 and the second plate 102. Compared with directly processing the liquid cooling flow channel in the liquid cooling plate, the processing is more convenient, and it is also more convenient to clean the liquid cooling flow channel.

[0040] It should be noted that the liquid cooling plate assembly 100 can be located at the bottom end of the assembled liquid cooling box. In this case, the first plate 101 can be located below the second plate 102. Of course, the liquid cooling plate assembly 100 can also be located in other positions of the assembled liquid cooling box, for example, located on the side of the assembled liquid cooling box. In this case, the first plate 101 and the second plate 102 can be arranged side by side. The first plate 101 and the second plate 102 can be snap-connected, fastener-connected or crimped. In addition, the coolant inlet 104 can be provided on the first plate 101 or on the second plate 102, and the coolant outlet 105 can be provided on the first plate 101 or on the second plate 102.

[0041] It can be understood that the liquid cooling groove 103 can be arranged on the surface of the first plate 101 close to the second plate 102, and the second plate 102 covers the liquid cooling groove 103 to form a liquid cooling channel. In addition, the liquid cooling groove 103 can also be arranged on the surface of the second plate 102 close to the first plate 101, and the first plate 101 covers the liquid cooling groove 103 to form a liquid cooling channel.

[0042] refer to Figure 4 As shown, in some embodiments of the present invention, the surface of the first plate 101 close to the second plate 102 is punched to form a liquid cooling groove 103. Compared with welding a plurality of spacers on the surface of the first plate 101 close to the second plate 102 to form the liquid cooling groove 103 between two adjacent spacers, the liquid cooling groove 103 of this embodiment is directly formed by punching the surface of the first plate 101 close to the second plate 102, which is not only more convenient to process and has lower production costs, but also can avoid the risk of liquid leakage caused by poor welding, thereby improving reliability.

[0043] It should be noted that, in some other embodiments of the present invention, the liquid cooling groove 103 may also be formed by stamping the surface of the second plate 102 close to the first plate 101 .

[0044] refer to Figure 4As shown, in some embodiments of the present invention, the liquid cooling groove 103 is formed with a plurality of mutually parallel first grooves 106 and a plurality of mutually parallel second grooves 107 along its own extension direction, the extension direction of the first groove 106 and the extension direction of the second groove 107 form an angle, and an arc groove 108 is formed between the first groove 106 and the adjacent second groove 107. For example, the first groove 106 can extend along the length direction of the liquid cooling plate assembly 100, the second groove 107 can extend along the width direction of the liquid cooling plate assembly 100, the extension direction of the first groove 106 and the extension direction of the second groove 107 form an angle of 90°, the arc groove 108 is located between the first groove 106 and the adjacent second groove 107, and the arc groove 108 can be arc-shaped or nearly arc-shaped.

[0045] In this embodiment, the arc groove 108 is provided to further reduce the resistance encountered by the coolant during its flow, thereby reducing the loss of the cooling liquid head, thereby achieving better heat dissipation and temperature control effects and better practicality.

[0046] It should be noted that the angle between the extension direction of the first groove 106 and the extension direction of the second groove 107 may also be 80°, 85° or other suitable degrees.

[0047] In some embodiments of the present invention, an annular sealing strip is provided between the edge of the first plate 101 and the edge of the second plate 102. The annular sealing strip can seal the edge of the first plate 101 and the edge of the second plate 102, thereby preventing the coolant from leaking. Moreover, the entire liquid cooling plate assembly 100 does not require welding, further preventing leakage caused by poor welding, improving reliability, and reducing production costs.

[0048] refer to Figure 2 As shown, in some embodiments of the utility model, the surface of the second plate 102 facing away from the first plate 101 forms a contact surface 109, and the contact surface 109 is used to contact the battery module. The first plate 101 is set as a stainless steel plate, and the second plate 102 is set as an aluminum plate. The first plate 101 plays a supporting role, and the second plate 102 contacts the battery module to play a heat transfer role. In this embodiment, the first plate 101 is set as a stainless steel plate, which has a higher structural strength and can provide stronger support, which can make up for the lack of strength of the second plate 102 made of aluminum. In addition, the thermal conductivity of stainless steel is about 1 / 4 of that of aluminum, which can reduce the problem of reducing the heat dissipation effect due to heat exchange between the coolant and the outside through the first plate 101.

[0049] refer to Figure 1 and Figure 2As shown, in some embodiments of the utility model, the assembled liquid cooling box body also includes a box cover 200, the box cover 200 is provided with an opening, the box cover 200 is provided with a flange 201 on the surrounding side of the opening, fasteners are installed between the flange 201 and the first plate 101, the second plate 102 is clamped between the box cover 200 and the first plate 101, and a accommodating cavity is formed between the box cover 200 and the second plate 102, and the accommodating cavity is used to accommodate the battery cell module.

[0050] For example, the box cover 200 may include a top plate and multiple side plates, the bottom ends of the multiple side plates are enclosed to form an opening, the flange 201 may be an annular structure and surround the bottom ends of the side plates of the box cover 200, the liquid cooling plate assembly 100 may be located at the bottom end of the box cover 200, the first plate 101 is located below the second plate 102, a plurality of fasteners are installed between the flange 201 and the first plate 101, the second plate 102 is clamped between the box cover 200 and the first plate 101, the second plate 102, the top plate of the box cover 200 and the side plates of the box cover 200 are enclosed to form a receiving cavity, and the battery cell module is received in the receiving groove.

[0051] In this embodiment, the flange 201 of the box cover 200 is connected to the first plate 101 through fasteners, so that the second plate 102 can be clamped and positioned, thereby realizing the assembly of the liquid cooling plate assembly 100 and the box cover 200, which is convenient to operate, saves time and effort. Moreover, when clamping the second plate 102, the second plate 102 and the first plate 101 can also cooperate to clamp the annular sealing strip, so as to achieve a better sealing effect.

[0052] refer to Figure 4 As shown, in some embodiments of the present invention, a limiting groove 110 is provided on the surface of the first plate 101 close to the second plate 102, and the second plate 102 is arranged in the limiting groove 110. The limiting groove 110 can limit the second plate 102 and prevent the second plate 102 from moving out of the gap between the box cover 200 and the first plate 101, so that the second plate 102 is installed more stably.

[0053] refer to Figure 4As shown, in some embodiments of the present invention, the liquid cooling tank 103 includes an inner tank section 111 and an outer tank section 112, the outer tank section 112 surrounds the outer side of the inner tank section 111, and the width of the outer tank section 112 is greater than the width of the inner tank section 111. Due to the heat collection effect, in general, the heat near the middle of the battery module is higher, and the heat near the edge is lower. In this embodiment, the width of the outer tank section 112 can be set wider, and the liquid cooling tank 103 can be provided with multiple circles of inner tank sections 111 in the middle area corresponding to the liquid cooling plate assembly 100, and the liquid cooling tank 103 can be provided with only one circle of outer tank sections 112 in the edge area corresponding to the liquid cooling plate assembly 100. In this way, while ensuring effective heat dissipation of the heat collection area in the middle of the battery module, the processing of the portion of the liquid cooling tank 103 corresponding to the edge of the liquid cooling plate assembly 100 can be made simpler and more convenient, and more practical.

[0054] refer to Figure 4 As shown, in some embodiments of the utility model, a plurality of guides 113 are provided in the outer groove section 112, and the plurality of guides 113 are arranged along the extension direction of the outer groove section 112, and the two ends of the guides 113 along the extension direction of the outer groove section 112 are set to be convex arcs. Since the outer groove section 112 is relatively wide, in this embodiment, a plurality of guides 113 are provided, which can guide the coolant to various positions of the outer groove section 112, thereby achieving a better heat dissipation effect, and the two ends of the guides 113 along the extension direction of the outer groove section 112 are convex arcs, thereby reducing the resistance caused by the guides 113 to the flow of the coolant, making the coolant flow smoother, and the pressure head loss is small, thereby achieving better heat dissipation and temperature control effects.

[0055] The energy storage device according to the second embodiment of the utility model includes the assembled liquid cooling box body of the first embodiment.

[0056] By adopting the assembled liquid cooling box of the first aspect of the utility model, the formed liquid cooling channel is spiral, so that the flow direction of the coolant is basically consistent, so that the coolant encounters less resistance when flowing, and the pressure head loss is smaller, thereby making the heat dissipation and temperature control effects better, and the coolant enters from a position close to the center of the liquid cooling channel, and the coolant with the lowest temperature that has just entered just dissipates the heat in the heat collection area near the middle of the battery cell module, thereby making the heat dissipation and temperature control effects better. In addition, the liquid cooling plate assembly 100 is assembled from the first plate 101 and the second plate 102, and the liquid cooling channel is formed by the first plate 101 and the second plate 102. Compared with directly processing the liquid cooling channel in the liquid cooling plate, the processing is more convenient, and it is also more convenient to clean the liquid cooling channel.

[0057] It should be noted that, since the energy storage device can adopt all the technical solutions of the assembled liquid cooling box of the first aspect embodiment mentioned above, it at least has all the beneficial effects brought by the technical solutions of the first aspect embodiment mentioned above, and these additional beneficial effects will not be repeated here.

[0058] It is understandable that the energy storage device may be a battery pack, a battery box, an energy storage cabinet or an energy storage container, etc. Other configurations and operations of the energy storage device according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0059] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An assembled liquid cooling box, characterized in that: include: The liquid cooling plate assembly comprises a first plate and a second plate, wherein one of the first plate and the second plate is provided with a spiral liquid cooling groove, and the other covers the liquid cooling groove to form a spiral liquid cooling channel, wherein the inner end of the liquid cooling channel is provided with a cooling liquid inlet, and the outer end of the liquid cooling channel is provided with a cooling liquid outlet.

2. The assembled liquid cooling box according to claim 1, characterized in that: The liquid cooling groove is formed by punching a surface of the first plate close to the second plate; or, The liquid cooling groove is formed by punching a surface of the second plate close to the first plate.

3. The assembled liquid cooling box according to claim 1, characterized in that: The liquid cooling groove is formed with a plurality of mutually parallel first grooves and a plurality of mutually parallel second grooves along its own extension direction. The extension direction of the first groove forms an angle with the extension direction of the second groove. An arc groove is formed between the first groove and the adjacent second groove.

4. The assembled liquid cooling box according to claim 1, characterized in that: An annular sealing strip is provided between the edge of the first plate and the edge of the second plate.

5. The assembled liquid cooling box according to claim 1, characterized in that: The surface of the second plate facing away from the first plate forms a contact surface, and the contact surface is used to contact the battery cell module. The first plate is set to be a stainless steel plate, and the second plate is set to be an aluminum plate.

6. The assembled liquid cooling box according to any one of claims 1 to 5, characterized in that: The assembled liquid cooling box also includes: The box cover is provided with an opening, and a flange is provided on the peripheral side of the opening. A fastener is installed between the flange and the first plate. The second plate is clamped between the box cover and the first plate. A accommodating cavity is formed between the box cover and the second plate, and the accommodating cavity is used to accommodate the battery cell module.

7. The assembled liquid cooling box according to claim 6, characterized in that: A limiting groove is provided on the surface of the first plate close to the second plate, and the second plate is matched and arranged in the limiting groove.

8. The assembled liquid cooling box according to any one of claims 1 to 5, characterized in that: The liquid cooling tank comprises an inner tank section and an outer tank section, wherein the outer tank section surrounds the outer side of the inner tank section, and the width of the outer tank section is greater than the width of the inner tank section.

9. The assembled liquid cooling box according to claim 8, characterized in that: A plurality of guide parts are arranged in the outer groove section, and the plurality of guide parts are arranged along the extension direction of the outer groove section. Both ends of the guide parts along the extension direction of the outer groove section are configured to be outwardly convex arcs.

10. An energy storage device, characterized in that: It comprises an assembled liquid cooling box as claimed in any one of claims 1 to 9.

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