Liquid cooling tray, preparation method thereof and energy storage battery pack

Abstract

The invention relates to the field of energy storage, and provides a liquid cooling tray and a preparation method thereof, and an energy storage battery pack, the liquid cooling tray comprises a support structure, the support structure comprises a first edge beam and a second edge beam, the first edge beam comprises a first part and a protruding part which are continuous along a first direction, the protruding part protrudes in the direction away from the first part along the first part. The liquid cooling plate body is located in a first cavity defined by the first edge beam and the second edge beam; the liquid cooling plate body comprises a temperature equalizing plate and a flow channel plate which are stacked, the flow channel plate is located on the first part, the temperature equalizing plate is located on the flow channel plate and the protruding part, and the temperature equalizing plate extends to the top surface of the protruding part along the side surface of the protruding part. According to the liquid cooling tray, the preparation method thereof and the energy storage battery pack provided by the embodiment of the invention, the strength and air tightness of the liquid cooling tray can be at least improved.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the field of energy storage, in particular to a liquid cooling tray and a preparation method thereof and an energy storage battery pack. BACKGROUND

[0002] The battery energy storage cabinet is composed of a plurality of battery modules, such as lithium ion battery modules, in series or parallel connection, and is the core part of the energy storage cabinet, responsible for charging, storing and releasing electric energy. When the power grid or other power supplies charge the battery energy storage cabinet, the electric energy enters the battery pack through the electrical connection and protection device, and is stored in the battery. The battery management system (BMS) is responsible for monitoring the charging state of the battery pack during this process, ensuring the safety and efficiency of the charging process. After charging is completed, the battery pack will store the electric energy in standby state, waiting for release when needed. With the continuous innovation of energy storage technology and the expansion of application scenarios, the application of battery energy storage cabinet in the field of energy internet, smart city, etc. will be more extensive.

[0003] The full-sealing design of the energy storage Pack is the key to ensure its safety and long-term stable operation. The essence of sealing is to use a device to close (seal) a gap or make a joint not to leak fluid (gas or liquid). The sealing design helps to maintain the stability of the temperature and pressure inside the energy storage Pack, which plays a key role in the normal work and performance of the battery. And the sealing design can reduce the influence of the external environment on the battery interior, such as humidity, dust and other pollutants, thereby improving the reliability and service life of the system. In addition, the use of appropriate sealing materials and structures can effectively improve the wear resistance and anti-aging performance of the sealing element, enhance the durability of the entire energy storage system, and reduce maintenance costs.

[0004] Therefore, how to design a box that meets the current needs of energy storage battery pack and has high airtightness and safety is a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] The embodiment of the present application provides a liquid cooling tray and a preparation method thereof and an energy storage battery pack, which at least helps to improve the strength and airtightness of the liquid cooling tray.

[0006] According to some embodiments of the present application, the present application provides a liquid cooling tray in one aspect, comprising: a support structure, the support structure comprising two first side beams arranged opposite along a first direction X and two second side beams arranged opposite along a second direction Y, two ends of the second side beams being connected with the first side beams respectively, the first side beams and the second side beams enclosing a first cavity; wherein the first side beam comprises a first part continuous along the first direction X and a protruding part, wherein the protruding part protrudes along a third direction Z; a liquid cooling plate body, the liquid cooling plate body being located in the first cavity; the liquid cooling plate body comprising: a layered heat spreader and a flow channel plate, the flow channel plate being located on the first part, the heat spreader being located on the flow channel plate and the protruding part, the heat spreader extending along a side surface of the protruding part to a top surface of the protruding part; wherein the third direction Z is a direction in which the flow channel plate points to the heat spreader.

[0007] According to some embodiments of the present application, the present application provides a preparation method of a liquid cooling tray in another aspect, comprising: forming a first side beam and a second side beam by a rolling process; the process step of forming the first side beam by the rolling process comprises: providing a substrate, rolling out a first part and a protruding part in sequence by a rolling process, and the protruding part protruding along a third direction Z; forming the liquid cooling plate body by a stamping process, comprising: providing a first substrate and a second substrate; stamping the first substrate into a flow channel plate, the flow channel plate having a flow channel therein; stamping the second substrate into a heat spreader, and making the heat spreader be stamped into a concave shape corresponding to the first side beam; assembling the flow channel plate and the heat spreader; assembling the liquid cooling plate body, the first side beam and the second side beam, so that the heat spreader extends along a side surface of the protruding part to a top surface of the protruding part.

[0008] According to some embodiments of the present application, the present application provides an energy storage battery pack in still another aspect, comprising: at least one battery module, the battery module comprising a plurality of battery cells; a liquid cooling tray as described in any one of the above embodiments or a liquid cooling tray prepared by the preparation method of the liquid cooling tray as described in the above embodiments, the battery module being located on the liquid cooling tray; a shell, the shell cooperating with the liquid cooling tray and enclosing a cavity, the battery module being located in the cavity.

[0009] The technical solutions provided by the embodiments of the present application have at least the following advantages:

[0010] The liquid cooling tray provided by the embodiment of the present application is characterized in that the first side beam and the second side beam are connected with each other and surround the first cavity, the first side beam comprises the first part and the protruding part which are continuous along the first direction, the protruding part protrudes in the direction away from the first part, and the side surface of the first part, the side surface of the protruding part and the top surface of the protruding part surround a protruding structure, that is, the first part and the protruding part surround a structure similar to an L shape, so that the first part can not only serve as the bottom plate of the accommodating space for accommodating the battery cell, but also serve as the supporting structure, thereby improving the strength and safety of the whole liquid cooling tray device. In addition, the end of the vapor chamber of the liquid cooling plate body extends to the top surface of the protruding part along the side surface of the protruding part, so that the vapor chamber can wrap the connection part of the first side beam and the second side beam, thereby reducing the gap and the loophole, and the air tightness of the whole cavity is also good. BRIEF DESCRIPTION OF DRAWINGS

[0011] One or more embodiments are illustrated by way of example in the figures that form a part of this disclosure and which are not intended to limit the application unless otherwise specifically indicated, the drawings shown in the figures are not to scale; in order to more clearly illustrate the technical solutions in the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly introduced below, obviously, the drawings in the following description can only be some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0012] Figure 1 A three-dimensional structural schematic diagram of the liquid cooling tray provided by an embodiment of the present application;

[0013] Figure 2 An exploded view of the liquid cooling tray provided by an embodiment of the present application;

[0014] Figure 3 A top view of the liquid cooling tray provided by an embodiment of the present application;

[0015] Figure 4 A sectional view along the A1-A2 section; Figure 3 A sectional view along the A1-A2 section;

[0016] Figure 5 A structural schematic diagram of the first part in the liquid cooling tray provided by an embodiment of the present application;

[0017] Figure 6 A structural schematic diagram of the protruding part in the liquid cooling tray provided by an embodiment of the present application;

[0018] Figure 7 Another structural schematic diagram of the protruding part in the liquid cooling tray provided by an embodiment of the present application;

[0019] Figure 8 For Figure 3 A sectional view along the B1-B2 section;

[0020] Figure 9 A partial structural schematic view of a liquid cooling tray provided by an embodiment of the present application;

[0021] Figure 10 For Figure 9 An exploded view of the corresponding liquid cooling tray;

[0022] Figure 11 A structural schematic view of an energy storage battery pack provided by another embodiment of the present application;

[0023] Figure 12 An exploded view of an energy storage battery pack provided by another embodiment of the present application. DETAILED DESCRIPTION

[0024] As can be known from the background, the current liquid cooling tray has poor air tightness, and thus the air tightness of the chamber formed by the liquid cooling tray and the shell is poor, thereby affecting the service life of the energy storage battery pack.

[0025] Embodiments of the present application provide a liquid cooling tray and a preparation method thereof, and an energy storage battery pack. Through the design of the first part and the protruding part of the first side beam and the design of the vapor chamber, the air tightness of the liquid cooling tray and the energy storage battery pack thereof can be good.

[0026] In the description of embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0027] In this document, referring to "embodiments" means that the specific features, structures or characteristics described in conjunction with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. The skilled in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0028] In the description of embodiments of the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the existence of A, the existence of A and B, and the existence of B. In addition, the character " / " in this document generally represents an "or" relationship between the front and rear associated objects.

[0029] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0030] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0031] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, 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; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0032] In the corresponding drawings of the embodiments of the present application, the thickness and area of the layers are exaggerated for better understanding and ease of description. When describing that a component (such as a layer, a film, a region or a substrate) is on or on the surface of another component, the component can be "directly" on the surface of the other component, or there can be a third component between the two components. On the contrary, when describing that a component is on the surface of another component or that a component surface forms or is provided with another component, it means that there is no third component between the two components. In addition, when describing that a component is "formed substantially" on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a part of the edge of the entire surface.

[0033] In the description of the embodiments of the present application, when a certain component "includes" another component, unless otherwise specified, other components are not excluded, and other components can be further included. In addition, when a layer, film, region, plate, etc. component is referred to as "on / under" another component, it can be "directly on" the other component (i.e. between the other component surface and the layer, film, region, plate, etc. component, no other component is present), or another component can be present therebetween. In addition, when a layer, film, region, plate, etc. component is "directly on" another component, or when a layer, film, region, plate, etc. component is on the surface of another component, it means that no other component is present therebetween.

[0034] The terms used in the description of various described embodiments herein are only used to describe specific embodiments, and are not intended to be limiting. As used in the description of various described embodiments and the appended claims, "the part" is also intended to include the plural form, unless the context clearly indicates otherwise. Among them, the components include layers, films, regions, or plates, etc.

[0035] The embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art can understand that in the embodiments of the present application, many technical details are presented in order to make the reader better understand the present application. However, the technical solutions claimed by the present application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0036] According to some embodiments of the present application, the embodiments of the present application provide a liquid cooling tray for improving the air tightness of the liquid cooling tray.

[0037] Figure 1 A perspective structural schematic diagram of a liquid cooling tray provided by an embodiment of the present application; Figure 2 An exploded view of a liquid cooling tray provided by an embodiment of the present application; Figure 3 A top view of a liquid cooling tray provided by an embodiment of the present application; Figure 4 A Figure 3 A sectional view along the A1-A2 section.

[0038] Reference Figures 1 to 4The liquid cooling tray comprises a support structure, the support structure comprises two first side beams 110 arranged opposite along a first direction X and two second side beams 101 arranged opposite along a second direction Y, two ends of the second side beam 101 are connected with the first side beam 110 respectively, and the first side beam 110 and the second side beam 101 enclose a first cavity 113; wherein the first side beam 110 comprises a first part 111 continuous along the first direction X and a protruding part 112, the protruding part 112 protrudes along a third direction Z and protrudes in a direction away from the first part 111 along the third direction Z. The liquid cooling tray comprises a liquid cooling plate body 120, which is located in the first cavity 113 enclosed by the first side beam 110 and the second side beam 101. The liquid cooling plate body 120 comprises a layered uniform temperature plate 121 and a flow channel plate 122, the flow channel plate 122 is located on the first part 111, the uniform temperature plate 121 is located on the flow channel plate 122 and the protruding part 112, and the uniform temperature plate 121 extends to the top surface of the protruding part 112 along the side surface of the protruding part 112; wherein the third direction Z is the direction in which the flow channel plate points to the uniform temperature plate.

[0039] The liquid cooling tray provided by the embodiment of the present application comprises the first side beam 110 and the second side beam 101 connected with each other and enclosing the first cavity 113, the first side beam 110 comprises the first part 111 continuous along the first direction X and the protruding part 112 protruding in the direction away from the first part 111 along the third direction Z, the side surface of the first part 111 and the protruding part 112 and the top surface of the protruding part 112 form a protruding structure, that is, the first part 111 and the protruding part 112 form a structure similar to an L shape, so that the first part 111 can not only serve as the bottom plate of the accommodation space for accommodating the battery cell, but also serve as the support structure, thereby improving the strength and safety of the entire liquid cooling tray device. In addition, the end of the uniform temperature plate 121 of the liquid cooling plate body 120 extends to the top surface of the protruding part 112 along the side surface of the protruding part 112, so that the uniform temperature plate 121 can wrap around the connection between the first side beam 110 and the second side beam 101, thereby reducing the gap and the vulnerability and improving the air tightness of the entire cavity.

[0040] In some embodiments, the material of the first side beam 110 and the second side beam 101 in the liquid cooling tray can be high-strength steel (HC550 / 980), which has high rigidity and strength and ensures the support force and stability of the liquid cooling tray.

[0041] In some embodiments, the first side beam 110 or the second side beam 101 is formed by rolling a piece of steel plate, so that the first side beam 110 or the second side beam 101 has high rigidity and strength, and damage to the liquid-cooled tray can be avoided. In addition, the thickness of the side beam formed by the rolling process is thinner than that of the side beam formed by other processes, so that the volume of the first side beam 110 and the second side beam 101 in the energy storage pack is smaller, and the integration of the energy storage pack can be improved.

[0042] In some embodiments, the second side beam 101 is clamped on or fixed on the first side beam 110, and the length of the first side beam 110 in the second direction Y is greater than or equal to the length of the liquid-cooled tray. The design of the first side beam 110 and the second side beam 101 makes the liquid-cooled tray have strong impact resistance and load dispersion capability. The vertical staggered arrangement and structural design of the first side beam 110 and the second side beam 101 make the transmission of vibration and impact load more uniform, enhance the impact resistance and vibration absorption capability of the box, and effectively improve the safety performance of the box.

[0043] In some embodiments, the clamping or connecting part of the first side beam 110 and the second side beam 101 has a sealing gasket, and the compression amount of the sealing gasket is greater than 50%, which can effectively ensure the air tightness of the box.

[0044] In some embodiments, the first side beam 110 and the second side beam 101 are provided with weight reduction holes, which can effectively reduce the total weight of the box and improve the specific energy index of the battery system.

[0045] In some embodiments, the first side beam 110 is a one-piece structure, that is, the first side beam 110 is a one-piece structure. When the battery module is placed on the first part 111, the weight of the battery module can be transmitted to the protruding part 112, so that part of the gravity can be shared. In addition, the one-piece structure has high strength, so that the first side beam 110 can have a protruding height and a wide width in a limited area, so as to have high rigidity and improve the safety of the liquid-cooled tray. Thirdly, the one-piece structure has good air tightness, which avoids the risk of leakage of the energy storage battery pack.

[0046] Figure 5 A structural schematic diagram of the first part in the liquid-cooled tray provided by an embodiment of the present application.

[0047] In some embodiments, in combination with reference to Figure 4 and Figure 5, the first part 111 includes a body part 161 and a bending part 162, the flow channel plate 122 is located on the body part 161, the body part 161 and the bending part 162 are connected with the protruding part 112, and the bending part 162 includes at least one second protruding part 114 protruding away from the body part 161. In this way, the first part 111 includes a two-layer stacked structure, and the strength of the first part 111 is relatively high. The bending part 162 includes at least one second protruding part 114, and the bending design of the second protruding part 114 can form a plurality of reinforcing rib structures between the bending part 162 and the body part 161, thereby improving the strength of the first part 111; and the cavity structure formed between the bending part 162 and the body part 161 can reduce the weight and the manufacturing cost of the first side beam 110.

[0048] In some embodiments, the cavity formed between the body part 161 and the bending part 162 can be filled with a thermal insulation layer or a phase change material. The thermal insulation layer can reduce the condensation problem caused by the temperature difference between the liquid cooling plate and the external environment, and the phase change material can quickly conduct the heat generated by the battery module, thereby reducing the risk of thermal runaway of the battery cell. When the phase change material starts to work, it continuously absorbs and conducts the heat generated inside the battery cell, so that the liquid cooling system does not need to be started when the heat generated by the battery cell is small; or the phase change material can make the battery cell in the battery module work in a safe and controllable temperature environment, improve the working efficiency of the battery module, and prolong the cycle life of the battery module.

[0049] Continuing to refer to Figure 4 , the protruding part 112 protrudes in the direction Z away from the first part 111 along the first part 111, and the height of the protruding part 112 is relatively high, that is, the height of the figure surrounded by the protruding part 112 is relatively high. On the one hand, the relatively high protruding part 112 can have relatively high strength, so that the strength of the first side beam 110 is relatively high; on the other hand, the protruding part 112 itself as a limiting component has a certain height with the first cavity surrounded by the other first side beam 110 and the two second side beams 101, thereby limiting and fixing the formed battery cell.

[0050] In some embodiments, the height L of the protruding part 112 is greater than or equal to 30 mm, for example, the height of the protruding part 112 can be 30 mm, 40 mm, 50 mm, 60 mm, 70 mm or 80 mm.

[0051] Figure 6 A structural schematic diagram of a protruding part in a liquid cooling tray provided by an embodiment of the present application.

[0052] In some embodiments, referring to Figure 6The protruding portion 112 comprises a continuous first bearing portion 141, a first sidewall portion 142, a second bearing portion 143, a second sidewall portion 144, a third bearing portion 145, a third sidewall portion 146, and a fourth bearing portion 147. The first bearing portion 141 is located on the third bearing portion 145, and the vapor chamber 121 is located on the first bearing portion 141. The fourth bearing portion 147 is located on the second bearing portion 143. The first bearing portion 141, the first sidewall portion 142, the second sidewall portion 144, and the second bearing portion 143 form a second cavity. The third bearing portion 145, the third sidewall portion 146, and the fourth bearing portion 147 divide the second cavity into a first sub-chamber 151 and a second sub-chamber 152. Through the bending design of the protruding portion 112, the fourth bearing portion 147 is located on the second bearing portion 143. The first bearing portion 141, the first sidewall portion 142, the second sidewall portion 144, and the second bearing portion 143 form a second cavity. The third bearing portion 145, the third sidewall portion 146, and the fourth bearing portion 147 divide the second cavity into a first sub-chamber 151 and a second sub-chamber 152. In this way, the two cavities formed by the first sub-chamber 151 and the second sub-chamber form two reinforcing ribs, which can increase the strength of the protruding portion 112. In addition, the first bearing portion 141 and the third bearing portion 145 are stacked with each other, and the fourth bearing portion 147 is located on the second bearing portion 143, thereby forming a supportable bottom plate. In this way, part of the gravity or impact force can be shared, and the strength and rigidity of the protruding portion 112 can be improved.

[0053] In some embodiments, the end of the fourth bearing portion 147 is in abutment with the first sidewall portion 142. In this way, the edge of the protruding portion 112 can be enclosed in the cavity inside the protruding portion 112, thereby avoiding the scratching problem and safety hazard caused by the edge of the protruding portion 112. In addition, the corrosion and oxidation problems caused by the exposure of the edge of the protruding portion 112 to the air can also be avoided.

[0054] Figure 7 Another structure diagram of the protruding portion in the liquid cooling tray is provided for an embodiment of the present application.

[0055] In some embodiments, in combination with reference to Figure 4 and Figure 7The protruding portion 112 further comprises a continuous fourth side wall portion 148 connected with the fourth bearing portion 147 and a fifth bearing portion 149 located on one side of the first bearing portion 141 towards the third bearing portion 145. The vapor chamber 121 is fixed to the laminated area 150 of the fifth bearing portion 149 and the first bearing portion 141 by the fixing structure. In this way, the fifth bearing portion 149 is located on one side of the first bearing portion 141, and the laminated area, i.e. the overlapping area, between the two has high strength. The rivet 124 is arranged in the laminated area 150, which can make the connection between the vapor chamber 121 and the first edge beam 110 more firm and have better stability.

[0056] In some embodiments, the first side wall portion 142 and the fourth side wall portion 148 abut each other, so that the edge of the first edge beam 110 towards the outside is arranged in two layers of steel materials, which can resist the impact force from the outside. The abutment between the first side wall portion 142 and the fourth side wall portion 148 also makes the edge of the first edge beam 110 have high strength and strong drawing force, so that it is not easy to be deformed by the weight of the battery module, thereby improving the service life and stiffness of the liquid cooling tray.

[0057] In some embodiments, multiple reinforcement rib structures can be formed in the protruding portion 112 by the side wall portions and the bearing portions, i.e. not limited to the two reinforcement rib structures exemplified in the embodiments of the present application.

[0058] In some embodiments, the support structure further comprises a support plate 115 located between the first portion 111 and the flow channel plate 122. The support plate 115 can improve the strength of the liquid cooling plate body 120, avoid deformation of the liquid cooling plate body 120 due to the weight of the battery module, and thereby improve the stiffness and service life of the liquid cooling tray.

[0059] In some embodiments, the support plate 115 can have a reinforcement rib design for improving the strength of the liquid cooling plate body 120. The reinforcement rib design can include a bending design along the first direction X and a bending design along the second direction Y.

[0060] It should be noted that the reinforcement rib design of the support plate 115 needs to avoid the flow channel design of the flow channel plate 122, i.e. the reinforcement rib avoids the flow channel 123 or is adjusted correspondingly according to the design of the flow channel plate 122.

[0061] In some embodiments, the support plate 115 can be designed to be attached to the flow channel plate 122, and structural glue is provided between the support plate 115 and the flow channel plate 122 to attach the support plate 115 to the flow channel plate 122. The support plate 115 can provide strong support to the flow channel plate 122 to prevent the flow channel plate 122 from being deformed. In other embodiments, the support plate 115 is provided at a distance from the flow channel plate 122 to avoid the support plate 115 and the flow channel plate 122 from contacting each other. In this way, the support plate 115 can act as a force-absorbing plate to absorb external impact forces and prevent the impact forces from impacting the flow channel plate 122, thereby avoiding the problem of poor air tightness of the flow channel.

[0062] In some embodiments, the support plate 115 can be a steel plate, which has high rigidity and can provide high strength to the liquid cooling plate body 120.

[0063] In some embodiments, the support plate 115 can be made of thermal insulation material. The support plate containing the thermal insulation material can improve the condensation problem of the liquid cooling plate body 120 while providing support to the liquid cooling plate body 120.

[0064] Figure 8 For Figure 3 A sectional view along the B1-B2 section.

[0065] In some embodiments, referring to Figure 8 , the liquid cooling plate body 120 is also fixed to the second side beam 101. The end of the uniform plate 121 extends along the side surface of the second side beam 101 to the top surface of the second side beam 101, and is then fixed to the second side beam 101 by rivets 124. In this way, the uniform plate 121 is placed on the first side beam 110 and the second side beam 101 as a whole by the roll-pressing design, and has good overall air tightness. The full encapsulation with good performance can prevent the liquid and gas in the battery cell from leaking, and can also help to maintain the temperature and pressure stability inside the energy storage pack.

[0066] In some embodiments, the support plate 115 is also fixed to the flow channel plate 122 and the second side beam 101 by blind hole pull rivets 125. The support plate 115 is connected to the second side beam 101 to improve the overall strength of the second side beam 101 while ensuring the internal sealing, and to prevent the liquid cooling plate body 120 from being deformed.

[0067] Figure 9 A partial structure schematic view of a liquid cooling tray provided by an embodiment of the present application; Figure 10 For Figure 9 An exploded view of a liquid cooling tray corresponding thereto. In this way, Figure 9 and Figure 10 For Figure 3 A partial view of C in

[0068] In some embodiments, in combination with reference to Figure 3 , Figure 9 and Figure 10 , further comprising: a cooling joint 131, the cooling joint 131 is used to connect a water nozzle of the liquid cooling plate body 120 and a cooling pipe 132, the cooling joint 131 is located in the first cavity 113, and the cooling pipe 132 passes through the second edge beam 101 and extends out of the second edge beam 101 away from one side of the first cavity 113. In this way, the cooling joint 131 is located inside the liquid cooling tray, which can reduce the risk of breakage caused by external bumps to the liquid cooling plate body 120, effectively improving the air tightness and service life of the liquid cooling plate body 120.

[0069] In some embodiments, further comprising: a reinforcing part 134, the reinforcing part 134 is located on the side of the second edge beam 101 away from the first cavity 113, the cooling pipe 132 passes through the second edge beam 101 and passes through the reinforcing part 134 and extends away from the first cavity 113; wherein the reinforcing part 134 is fixed on the second edge beam 101 by brazing process. The setting of the reinforcing part 134 can make the subsequently connected and movable cooling pipe 132 be firmly fixed on the second edge beam 101, and the strength of the second edge beam 101 itself is also high, preventing the cooling pipe 132 from moving. Secondly, the setting of the reinforcing part 134 can not only ensure the installation convenience of the cooling pipe 132, but also make the strength of the second edge beam 101 higher, thereby avoiding the problem of deformation of the second edge beam 101.

[0070] In some embodiments, the reinforcing part 134 is fixed on the second edge beam 101 by brazing process, and the sealing performance of the joint formed by the brazing process is good, so as to improve the air tightness of the liquid cooling tray. Secondly, the heat input required by the brazing process is low, which greatly reduces the penetration depth and has high strength, so as to improve the strength between the reinforcing part 134 and the second edge beam 101.

[0071] Referring to Figure 10 , the liquid cooling tray further comprises: a reinforcing plate 133, the reinforcing plate 133 is fixed on the second edge beam 101 by a nut.

[0072] Referring to Figure 1 , the liquid cooling tray further comprises: a third edge beam 102, the third edge beam 102 is located on the liquid cooling plate body 120 and is used to fix the liquid cooling plate body 120.

[0073] The liquid cooling tray provided by the embodiments of the present application is characterized in that the first side beam 110 and the second side beam 101 are connected with each other and surround the first cavity 113, the first side beam 110 comprises the first part 111 and the protruding part 112 which are continuous along the first direction X, the protruding part 112 protrudes in a direction away from the first part 111, the side surface of the first part 111 and the protruding part 112 and the top surface of the protruding part 112 form a protruding structure, that is, the first part 111 and the protruding part 112 form a structure similar to an L shape, in this way, the first part 111 can not only serve as the bottom plate of the accommodating space for accommodating the battery cell but also serve as a support structure, thereby improving the strength and safety of the whole liquid cooling tray device. In addition, the end of the vapor chamber 121 of the liquid cooling plate body 120 extends along the side surface of the protruding part 112 to the top surface of the protruding part 112, so that the vapor chamber 121 can wrap around the connection between the first side beam 110 and the second side beam 101, thereby reducing the gaps and loopholes and improving the air tightness of the whole cavity.

[0074] According to some embodiments of the present application, another aspect of the embodiments of the present application provides a preparation method of a liquid cooling tray, which is used for preparing the liquid cooling tray provided in the above embodiments, and has the same or corresponding technical features as the above embodiments, which will not be described in detail here.

[0075] The preparation method of the liquid cooling tray comprises: forming the first side beam 110 and the second side beam 101 through a rolling process.

[0076] In some embodiments, the process step of forming the first side beam 110 through the rolling process comprises: providing a substrate, and rolling out the first part 111 and the protruding part 112 in sequence through a rolling process, and the protruding part 112 protrudes along the third direction Z.

[0077] The preparation method of the liquid cooling tray comprises: forming the liquid cooling plate body 120 through a stamping process, comprising: providing a first substrate and a second substrate; stamping the first substrate into the flow channel plate 122, the flow channel plate 122 having a flow channel inside; stamping the second substrate into the vapor chamber 121, and making the vapor chamber 121 be stamped into a concave shape corresponding to the first side beam 110; assembling the flow channel plate 122 and the vapor chamber 121.

[0078] The preparation method of the liquid cooling tray comprises: assembling the liquid cooling plate body 120, the first side beam 110 and the second side beam 101, so that the vapor chamber 121 extends along the side surface of the protruding part 112 to the top surface of the protruding part 112.

[0079] The preparation method of the liquid cooling tray provided by the embodiments of the present application is simple and easy to operate, and does not deform the uniform temperature plate 121 too much, thereby ensuring the strength and stability of the uniform temperature plate 121, and further ensuring the air tightness and safety of the finally prepared liquid cooling tray, and prolonging the service life of the liquid cooling tray.

[0080] According to some embodiments of the present application, the embodiments of the present application further provide a kind of energy storage battery pack, including the liquid cooling tray provided by the above-mentioned embodiments, with the same or corresponding technical features of the above-mentioned embodiments, which will not be described in detail here.

[0081] Figure 11 A structural schematic diagram of an energy storage battery pack provided by another embodiment of the present application; Figure 12 An exploded view of an energy storage battery pack provided by another embodiment of the present application.

[0082] Reference Figure 11 And Figure 12 According to some embodiments of the present application, the embodiments of the present application further provide a kind of energy storage battery pack, including: at least one battery module 12, battery module 12 includes a plurality of battery cells 200;Liquid cooling tray 10 of any one of the above-mentioned embodiments or liquid cooling tray 10 prepared by the preparation method of the liquid cooling tray of the above-mentioned embodiments, battery module 12 is located on the liquid cooling tray 10;Shell 11, shell 11 cooperates with liquid cooling tray 10, and forms cavity 14, battery module 12 is located in cavity 14.

[0083] In some embodiments, the energy storage battery pack is a whole unit assembled by a plurality of energy storage modules, used for storing and providing electric energy. The energy storage battery pack is usually composed of several battery modules 12, connectors, battery management systems, heat dissipation systems, electrical interfaces and shells, etc.

[0084] The battery management system is responsible for monitoring and managing the charging and discharging process of the battery to ensure the safety and performance stability of the battery. BMS can monitor the voltage, temperature and current of the battery cell, and perform battery state estimation and balance control to avoid overcharging, overdischarging, overtemperature and other situations, and provide a communication interface to interact with external systems.

[0085] The battery module 12 is connected by a plurality of battery cells in parallel or series to increase the voltage, capacity or power of the battery system. The energy storage battery pack is also responsible for providing other functions and characteristics required by the battery management system, such as electrical interface for connecting to external systems.

[0086] In some embodiments, the energy storage battery pack also generally has a heat dissipation system for controlling the temperature of the battery. Through the heat dissipation system, the battery module 12 can be effectively cooled to prevent overheating and maintain the battery within an appropriate operating temperature range.

[0087] In some embodiments, the energy storage battery pack protection structure is used to protect the battery module 12 and the BMS and provide physical support and isolation while ensuring the safety and reliability of the battery system.

[0088] In some embodiments, the housing 11 can provide protection, heat dissipation, and protection of the battery system from external environments. The housing cooperates with the liquid cooling tray to form a closed cavity (chamber 14) that can provide protection and heat dissipation functions for the battery module 12.

[0089] In some embodiments, the housing 11 and the liquid cooling tray 10 have a sealing layer 13 that achieves the sealing of the energy storage battery pack. The sealing layer 13 has certain chemical and pressure compatibility and can withstand the operating temperature range of the system, including high and low temperature environments. The material selection of the sealing layer 13 depends on the use environment and service life requirements. The materials of the sealing layer 13 include rubber, polytetrafluoroethylene (PTFE), nylon, metal, etc.

[0090] The sealing layer 13 can adapt to the slight deformation that may occur during the operation of the system to ensure good sealing effect under various working conditions. The deformation of a general gasket is greater than 30% and less than 60%, and the sealing interface pressure is greater than 30 kPa.

[0091] It can be understood by those skilled in the art that the above embodiments are specific embodiments for implementing the present application, and in actual application, various changes can be made in form and details without departing from the spirit and scope of the present application. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, therefore the protection scope of the present application should be limited by the scope defined in the claims.

Claims

1. A liquid-cooled tray, characterized by, Comprise: Support structure, the support structure comprises two first edge beams (110) which are oppositely arranged along a first direction X and two second edge beams (101) which are oppositely arranged along a second direction Y, two ends of the second edge beam (101) are connected with the first edge beam (110) respectively, and the first edge beam (110) and the second edge beam (101) enclose a first cavity (113); wherein the first edge beam (110) comprises a first part (111) which is continuous along the first direction X and a protruding part (112), Wherein, the protruding part (112) protrudes along a third direction Z; Liquid cooling plate body (120), the liquid cooling plate body (120) is located in the first cavity (113); the liquid cooling plate body (120) comprises: a layered temperature equalization plate (121) and a flow channel plate (122), the flow channel plate (122) is located on the first part (111), the temperature equalization plate (121) is located on the flow channel plate (122) and the protruding part (112), and the temperature equalization plate (121) extends to the top surface of the protruding part (112) along the side surface of the protruding part (112); Wherein, the third direction Z is the direction in which the flow channel plate (122) points to the temperature equalization plate (121).

2. The liquid-cooled tray of claim 1, wherein, The protruding part (112) and the first part (111) are integrally formed.

3. The liquid-cooled tray of claim 1 or 2, wherein, The protruding part (112) comprises: a continuous first bearing part (141), a first side wall part (142), a second bearing part (143), a second side wall part (144), a third bearing part (145), a third side wall part (146) and a fourth bearing part (147), the first bearing part (141) is located on the third bearing part (145), the temperature equalization plate (121) is located on the first bearing part (141), the fourth bearing part (147) is located on the second bearing part (143), and the first bearing part (141), the first side wall part (142), the second side wall part (144) and the second bearing part (143) constitute a second cavity, and the third bearing part (145), the third side wall part (146) and the fourth bearing part (147) divide the second cavity into a first sub-chamber (151) and a second sub-chamber (152).

4. The liquid-cooled tray of claim 3, wherein, The protruding part (112) further comprises: a continuous fourth side wall part (148) and a fifth bearing part (149), the fourth side wall part (148) is connected with the fourth bearing part (147), and the fifth bearing part (149) is located on one side of the first bearing part (141) towards the third bearing part (145); the temperature equalization plate (121) is fixed to the laminated area (150) of the fifth bearing part (149) and the first bearing part (141) through a fixing structure.

5. The liquid-cooled tray of claim 1, wherein, The first part (111) comprises a body part (161) and a bending part (162), the flow channel plate (122) is located on the body part (161), the body part (161) and the bending part (162) are connected with the protruding part (112), and the bending part (162) comprises at least one second protruding part (114) protruding away from the body part (161).

6. The liquid-cooled tray of claim 1, wherein, The support structure further comprises a support plate (115) located between the first part (111) and the flow channel plate (122).

7. The liquid-cooled tray of claim 1, wherein, Further comprising: A cooling joint (131) for connecting a water nozzle of the liquid cooling plate body (120) and a cooling pipe (132), the cooling joint (131) is located in the first cavity (113), and the cooling pipe (132) passes through the second edge beam (101) and extends out of the second edge beam (101) away from one side of the first cavity (113).

8. The liquid-cooled tray of claim 7, wherein, Further comprising: A reinforcing part (134) located on the side of the second edge beam (101) away from the first cavity (113), the cooling pipe (132) passes through the second edge beam (101) and the reinforcing part (134) and extends away from the first cavity (113); Wherein, the reinforcing part (134) is fixed on the second edge beam (101) through a brazing process.

9. A method of manufacturing a liquid-cooled tray, characterized by, Including: Forming the first edge beam (110) and the second edge beam (101) through a rolling process, the process steps for forming the first edge beam (110) through the rolling process include: providing a substrate, and sequentially rolling out the first part (111) and the protruding part (112) through a rolling process, and the protruding part (112) protrudes in a third direction Z; Forming the liquid cooling plate body (120) through a stamping process, including: providing a first substrate and a second substrate; stamping the first substrate into a flow channel plate (122), the flow channel plate (122) has a flow channel (123) therein; stamping the second substrate into a uniform temperature plate (121), and making the uniform temperature plate (121) be stamped into a concave shape corresponding to the first edge beam (110); Assembling the flow channel plate (122) and the uniform temperature plate (121); Assembling the liquid cooling plate body (120), the first edge beam (110) and the second edge beam (101), so that the uniform temperature plate (121) extends along the side surface of the protruding part (112) to the top surface of the protruding part (112).

10. An energy storage battery pack, characterized by, Including: At least one battery module (12) comprising a plurality of battery cells (200); The liquid cooling tray (10) of any one of claims 1-8 or the liquid cooling tray (10) prepared by the preparation method of the liquid cooling tray of claim 9, the battery module (12) is located on the liquid cooling tray (10); A housing (11) cooperating with the liquid cooling tray (10) and enclosing a cavity (14), and the battery module (12) is located in the cavity (14).

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