Liquid cooling plate and battery assembly

Abstract

The utility model discloses a liquid cooling plate and a battery pack, the liquid cooling plate comprises a first plate body part and a second plate body part, the first plate body part is provided with a plurality of first limiting ribs which are arranged side by side at intervals along a first direction and extend along a second direction, and the second plate body part is provided with a plurality of second limiting ribs which are arranged side by side at intervals along the second direction; the second plate body part is provided with a plurality of second limiting ribs which are arranged side by side at intervals in the first direction and extend in the second direction, the first free ends, away from the first plate body part, of the first limiting ribs are in clearance fit with the second plate body part, and the second free ends, away from the second plate body part, of the second limiting ribs are in clearance fit with the first plate body part. The first limiting ribs and the second limiting ribs are distributed in a staggered mode. An elastic piece is arranged between each first limiting rib and the corresponding adjacent second limiting rib, each elastic piece has deformation allowance in the third direction, and every two of the first direction, the second direction and the third direction intersect. According to the liquid cooling plate, external acting force can be absorbed, deformation recovery is carried out, unrecoverable deformation is reduced, and the battery cell and the liquid cooling plate are attached more reliably.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange, in particular to a liquid cooling plate and a battery assembly having the liquid cooling plate. Background Art

[0002] Currently, the industry has begun to adopt large-surface liquid cooling technology for power battery thermal management liquid cooling plates. However, due to the expansion and deformation of the battery cells in the later stages of the charge and discharge cycle, the large-surface liquid cooling plate is squeezed and deformed, resulting in a loose fit between the liquid cooling plate and the battery cells, affecting the thermal management performance. There is room for improvement. Utility Model Content

[0003] 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 a liquid cooling plate, in which a first partition plate and a second partition plate that can be elastically deformed are provided, so that the liquid cooling plate can well adapt to the charging and discharging deformation of the battery cell and ensure the cooling effect.

[0004] According to an embodiment of the utility model, the liquid cooling plate comprises: a first plate body and a second plate body, the first plate body and the second plate body are arranged opposite to each other, the first plate body and the second plate body are used to form a containing cavity, and the containing cavity is used to circulate heat exchange liquid; the first plate body is provided with a plurality of first limiting ribs extending along the second direction and arranged side by side and spaced apart along the first direction, the second plate body is provided with a plurality of second limiting ribs extending along the second direction and arranged side by side and spaced apart along the first direction, the first limiting rib is away from the first plate body The first free end of the first limiting rib is gap-matched with the second plate body, the second free end of the second limiting rib is away from the second plate body The second free end of the second limiting rib is away from the second plate body and gap-matched with the first plate body, and the plurality of the first limiting ribs and the plurality of the second limiting ribs are staggered; an elastic member is arranged between each adjacent first limiting rib and the second limiting rib, and the elastic member has a deformation margin along the third direction, and the first direction, the second direction and the third direction are arranged to intersect each other.

[0005] The liquid cooling plate according to the embodiment of the utility model can absorb a certain amount of external force applied to the liquid cooling plate, and can also perform a certain degree of deformation recovery after the external force is removed. In addition, when the force applied to the liquid cooling plate is too large, the structural stability of the liquid cooling plate can be ensured, and irreversible deformation of the liquid cooling plate can be prevented, thereby improving the safety and reliability of the liquid cooling plate, and thereby ensuring that the battery cell and the liquid cooling plate can always maintain a good fit.

[0006] According to the liquid cooling plate of some embodiments of the present invention, the outer periphery of the first plate body portion is welded to the outer periphery of the second plate body portion, and the first plate body portion and the second plate body portion enclose the accommodating cavity.

[0007] According to the liquid cooling plate of some embodiments of the utility model, one side of the elastic member along the first direction is connected to the first connecting end of the adjacent first limiting rib close to the first plate body, and the other side of the elastic member along the first direction is abutted against the second connecting end of the adjacent second limiting rib close to the second plate body.

[0008] According to some embodiments of the utility model, the liquid cooling plate further includes a water inlet sealing component and a water outlet sealing component, the first plate body portion and the second plate body portion are integrally formed, the water inlet sealing component is sealedly connected to one end of the liquid cooling plate along the second direction, the water outlet sealing component is sealedly connected to the other end of the liquid cooling plate along the second direction, and the water inlet sealing component, the water outlet sealing component, the first plate body portion and the second plate body portion enclose the accommodating cavity.

[0009] According to the liquid cooling plate of some embodiments of the present invention, the two ends of the elastic member along the second direction are connected to the first connecting end of the first limiting rib close to the first plate body, and / or the two ends of the elastic member along the second direction are connected to the second connecting end of the second limiting rib close to the second plate body.

[0010] According to the liquid cooling plate of some embodiments of the present invention, the extension directions of the elastic members located on both sides of the first limiting rib or the second limiting rib in the first direction intersect.

[0011] According to the liquid cooling plate of some embodiments of the present invention, the first direction is the width direction of the liquid cooling plate, the second direction is the length direction of the liquid cooling plate, and the third direction is the thickness direction of the liquid cooling plate.

[0012] According to the liquid cooling plate of some embodiments of the present invention, an extension length of the first limiting rib or the second limiting rib along the third direction is greater than half of the maximum distance between the first plate body portion and the second plate body portion.

[0013] According to the liquid cooling plate of some embodiments of the present invention, an extension length of the first limiting rib or the second limiting rib along the third direction is L, and satisfies: 0.6 mm ≤ L ≤ 1 mm.

[0014] The utility model also provides a battery assembly.

[0015] The battery assembly according to the embodiment of the utility model comprises a battery cell and the liquid cooling plate described in any one of the above embodiments, wherein the battery cell is bonded and connected to one of the first plate body part and the second plate body part.

[0016] The advantages of the battery assembly and the above-mentioned liquid cooling plate over the prior art are the same and will not be described in detail here.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural diagram of a battery assembly according to an embodiment of the utility model;

[0020] Figure 2 is a schematic structural diagram of a liquid cooling plate according to an embodiment of the utility model;

[0021] Figure 3 is a front view of a liquid cooling plate according to an embodiment of the utility model;

[0022] Figure 4 is a cross-sectional view of a liquid cooling plate according to an embodiment of the utility model;

[0023] Figure 5 is a partial enlarged view of a cross section of a liquid cooling plate according to an embodiment of the utility model;

[0024] Figure 6 is an exploded view of a liquid cooling plate according to some embodiments of the present invention.

[0025] Reference numerals:

[0026] The battery assembly 100,

[0027] Liquid cooling plate 1, first plate body 11, first limiting rib 111, second plate body 12, second limiting rib 121, elastic member 13, water inlet sealing member 14, water outlet sealing member 15, accommodating cavity 16, water inlet 17, water outlet 18,

[0028] Battery cell 2. 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 utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Reference below Figure 1-Figure 6 A liquid cooling plate 11 according to an embodiment of the utility model is described. The liquid cooling plate 11 can be used to dissipate heat for a battery cell 22, and an elastically deformable elastic member 13 is arranged in the liquid cooling plate 11, so that the liquid cooling plate 11 can adapt to the expansion and deformation of the battery cell 22 during the charging and discharging process of the battery cell 22, thereby ensuring that the liquid cooling plate 11 can maintain contact with the battery cell 22, thereby improving the heat dissipation effect of the liquid cooling plate 11 on the battery cell 22.

[0033] like Figure 1-Figure 6 As shown, the liquid cooling plate 11 according to the embodiment of the present utility model includes: a first plate body 11 and a second plate body 12 .

[0034] The first plate body 11 and the second plate body 12 are arranged opposite to each other, and the first plate body 11 and the second plate body 12 are used to form a receiving cavity 16, and the receiving cavity 16 is used to circulate heat exchange liquid, wherein the first plate body 11 and the second plate body 12 can be spaced apart and arranged opposite to each other along the third direction, so that the heat exchange liquid can circulate between the first plate body 11 and the second plate body 12. When the liquid cooling plate 1 is actually installed in the battery assembly 100, one of the first plate body 11 and the second plate body 12 is connected to the battery cell 2 in a close fit, so that the heat generated by the battery cell 2 can be taken away by the heat exchange fluid, so as to achieve the cooling effect on the battery cell 2.

[0035] The first plate body 11 is provided with a plurality of first limiting ribs 111 extending along the second direction and arranged side by side and spaced apart along the first direction, and the second plate body 12 is provided with a plurality of second limiting ribs 121 extending along the second direction and arranged side by side and spaced apart along the first direction, the first limiting rib 111 has a first free end away from the first plate body 11 and is loosely fitted with the second plate body 12, and the second limiting rib 121 has a second free end away from the second plate body 12 and is loosely fitted with the first plate body 11. In other words, the first limiting rib 111 is arranged to be connected to the first plate body 11 and protrude toward the second plate body 12, and at the same time, the second limiting rib 121 is arranged to be connected to the second plate body 12 and protrude toward the first plate body 11.

[0036] Among them, a plurality of first limiting ribs 111 and a plurality of second limiting ribs 121 are staggered, that is, a plurality of first limiting ribs 111 and a plurality of second limiting ribs 121 are provided, and a plurality of first limiting ribs 111 and a plurality of second limiting ribs 121 are staggered along the first direction. The first direction, the second direction and the third direction are provided to intersect in pairs, such as the first direction, the second direction and the third direction are provided to be perpendicular to each other, for example, the first direction is provided to be along the width direction of the liquid cooling plate 1, the second direction is provided to be along the length direction of the liquid cooling plate 1, and the third direction is provided to be along the thickness direction of the liquid cooling plate 1, or the first direction, the second direction and the third direction may be combined and designed in other forms, and the scheme in the utility model may be realized.

[0037] And, an elastic member 13 is arranged between each adjacent first limiting rib 111 and second limiting rib 121, and the elastic member 13 has a deformation margin along the third direction. Among them, when the battery cell 2 expands during the charging and discharging process, its expansion force acts on the liquid cooling plate 1 from the outside, such as acting on the first plate body 11 or the second plate body 12 along the third direction. Therefore, when the liquid cooling plate 1 is subjected to the force in the third direction, the first plate body 11 and the second plate body 12 can be relatively close, and the elastic member 13 is squeezed in the process of being relatively close, and with the elastic deformation of the elastic member 13 in the third direction, the external force on the liquid cooling plate 1 can be buffered and absorbed, thereby reducing the overall deformation of the liquid cooling plate 1, and after being free from external force, the elastic force can be used to achieve structural recovery. At the same time, the first limiting rib 111 and the second limiting rib 121 are provided to play a supporting role between the first plate body 11 and the second limiting part. For example, after the liquid cooling plate 1 is subjected to pressure and the elastic member 13 is deformed to a certain extent, the gap between the first limiting rib 111 and the second plate body 12 is reduced and the first limiting rib 111 is gradually pressed against the second plate body 12, and the gap between the second limiting rib 121 and the first plate body 11 is reduced and the second limiting rib 121 is gradually pressed against the first plate body 11.

[0038] In other words, when the liquid cooling plate 1 is deformed to the maximum extent, the elastic member 13 absorbs the force, and when the liquid cooling plate 1 is not subjected to external force, it can recover from deformation under the elastic action of the elastic member 13. At the same time, the first limiting rib 111 and the second limiting rib 121 support and limit between the first plate body 11 and the second plate body 12 to prevent the first plate body 11 and the second plate body 12 from further deformation, that is, to avoid the liquid cooling plate 1 from being subjected to excessive force and causing irreversible deformation, thereby ensuring the overall structural stability of the liquid cooling plate 1 and, at the same time, ensuring that the heat exchange fluid in the accommodating cavity 16 can flow normally, thereby improving the structural safety of the liquid cooling plate 1. In this way, the outer surface of the liquid cooling plate 1 can be relatively flat, thereby ensuring that the liquid cooling plate 1 and the battery cell 2 are effectively pressed into contact, thereby ensuring the cooling effect on the battery cell 2.

[0039] The liquid cooling plate 1 according to the embodiment of the utility model can absorb a certain amount of external force applied to the liquid cooling plate 1, and can also perform a certain degree of deformation recovery after the external force is removed, and can ensure the structural stability of the liquid cooling plate 1 when the force applied to the liquid cooling plate 1 is too large, prevent the liquid cooling plate 1 from having irreversible deformation, improve the safety and reliability of the liquid cooling plate 1, and thereby ensure that the battery cell 2 and the liquid cooling plate 1 can always maintain a good fit.

[0040] In some embodiments, the outer periphery of the first plate body 11 is welded to the outer periphery of the second plate body 12, and the first plate body 11 and the second plate body 12 enclose a receiving cavity 16. That is, in actual design, the first plate body 11 and the second plate body 12 can be formed separately, and the formed first plate body 11 and the second plate body 12 are welded together to form a receiving cavity 16 with a closed outer periphery.

[0041] Therefore, by separately forming the first plate body 11 and the second plate body 12, the overall design difficulty of the liquid cooling plate 1 can be reduced. In particular, if the first plate body 11 and the second plate body 12 are both formed by stamping and are welded together after stamping, the processing difficulty of the liquid cooling plate 1 is greatly reduced, which is beneficial to improving the processing and forming efficiency and reducing the setting cost.

[0042] In a further embodiment, one side of the elastic member 13 along the first direction is connected to the first connecting end of the adjacent first limiting rib 111 close to the first plate body portion 11, and the other side of the elastic member 13 along the first direction is abutted against the second connecting end of the adjacent second limiting rib 121 close to the second plate body portion 12, that is, during actual molding, the elastic member 13 can be fixedly connected to the first plate body portion 11, and after the first plate body portion 11 and the second plate body portion 12 are welded together, the other side of the elastic member 13 in the first direction is pressed against the second limiting rib 121.

[0043] Therefore, after the first plate body 11 and the second plate body 12 are welded, the elastic member 13 is located between the first plate body 11 and the second plate body 12, and the two ends of the elastic member 13 can act on the first limiting rib 111 and the second limiting rib 121 respectively, and then when the liquid cooling plate 1 such as the first plate body 11 or the second plate body 12 is subjected to external force, the elastic member 13 can be elastically deformed under the action of the external force, and, after the liquid cooling plate 1 is not subjected to external force, the elastic force of the elastic member 13 can act on the first limiting rib 111 and the second limiting rib 121, and the first limiting rib 111 and the second limiting rib 121 are used or the first plate body 11 and the second plate body 12 are directly pushed to restore the compressive deformation, so that the liquid cooling plate 1 will not have serious structural deformation.

[0044] In other embodiments, Figure 2 , Figure 3 and Figure 6 As shown, the liquid cooling plate 1 further includes a water inlet sealing member 14 and a water outlet sealing member 15, and the first plate body 11 and the second plate body 12 are integrally formed, such as the first plate body 11 and the second plate body 12 are configured as an inflatable structure similar to a harmonica tube.

[0045] The water inlet sealing component 14 is sealedly connected to one end of the liquid cooling plate 1 along the second direction, and the water outlet sealing component 15 is sealedly connected to the other end of the liquid cooling plate 1 along the second direction. In other words, after the first plate body 11 and the second plate body 12 are integrally formed, the space between the first plate body 11 and the second plate body 12 is open at both ends in the second direction, and the water inlet sealing component 14 and the water outlet sealing component 15 are respectively located at the two ends of the first plate body 11 and the second plate body 12 to close the two ends of the space between the first plate body 11 and the second plate body 12, so that the water inlet sealing component 14, the water outlet sealing component 15, the first plate body 11 and the second plate body 12 enclose a receiving cavity 16.

[0046] Among them, a water inlet 17 is arranged on the water inlet sealing member 14, and a water outlet 18 is arranged on the water outlet sealing member 15. Therefore, after the water inlet sealing member 14, the water outlet sealing member 15, the first plate body 11 and the second plate body 12 are connected and fixed, the water can enter the accommodating cavity 16 from the water inlet 17, and after entering the water inlet sealing member 14, the water flows toward the space between the first plate body 11 and the second plate body 12, and flows toward the water outlet sealing member 15, and then flows out of the accommodating cavity 16 from the water outlet 18.

[0047] In a further embodiment, both ends of the elastic member 13 along the second direction are connected to the first connecting end of the first limiting rib 111 close to the first plate body portion 11, and / or both ends of the elastic member 13 along the second direction are connected to the second connecting end of the second limiting rib 121 close to the second plate body portion 12.

[0048] That is to say, during actual installation, the elastic member 13 can be first installed between the first plate body 11 and the second plate body 12, and then the water inlet sealing member 14 and the water outlet sealing member 15 can be installed at both ends of the first plate body 11 and the second plate body 12, wherein the elastic member 13 can be installed in the first plate body 11 and the second plate body 12 and then welded and fixed to the first plate body 11, or welded and fixed to the second plate body 12. It can be understood that the space between the first plate body portion 11 and the second plate body portion 12 is open at both ends along the second direction, and the elastic member 13 is penetrated in the space between the first plate body portion 11 and the second plate body portion 12 along the second direction. After the penetration is completed, the end of the elastic member 13 is close to the end of the first plate body portion 11 or the end of the second plate body portion 12. At this time, the end of the elastic member 13 can be welded to one of the ends of the first plate body portion 11 and the second plate body portion 12, so that the elastic member 13 can be stably installed between the first plate body portion 11 and the second plate body portion 12 to achieve the installation and fixation of the structure.

[0049] In some embodiments, Figure 4 and Figure 5 As shown, the extension directions of the elastic members 13 on both sides of the first limiting rib 111 or the second limiting rib 121 in the first direction intersect. In other words, the elastic member 13 is obliquely arranged between the first plate body portion 11 and the second plate body portion 12, and there is an angle between the elastic member 13 and the first direction, and there is also an angle between the elastic member 13 and the third direction.

[0050] Therefore, during the expansion of the battery cell 2, the force generated by the battery cell 2 can directly act on the first plate body 11 or the second plate body 12, and transmit the force in the third direction to the elastic member 13. After receiving the force, the elastic member 13 can deform along the third direction, thereby absorbing the expansion force of the battery cell 2, and after the battery cell 2 cools and shrinks, the elastic member 13 recovers the deformation along the third direction, thereby squeezing the first plate body 11 and the second plate body 12, and realizing the deformation recovery of the liquid cooling plate 1. In short, the elastic member 13 is set to be inclined relative to the first plate body 11 and the second plate body 12, so that it can effectively deform and absorb the force when under pressure, and can automatically realize deformation recovery after the force is removed.

[0051] The angle between the elastic member 13 and the first plate portion 11 and the angle between the elastic member 13 and the second plate portion 12 may be between 45° and 50° to better absorb stress.

[0052] In some embodiments, Figure 4 and Figure 5As shown, the first direction is the width direction of the liquid cooling plate 1, the second direction is the length direction of the liquid cooling plate 1, and the third direction is the thickness direction of the liquid cooling plate 1. Therefore, the first plate body 11 and the second plate body 12 can be arranged to be relatively arranged along the thickness direction of the liquid cooling plate 1, and the battery cell 2 can be attached and connected to the first plate body 11 or the second plate body 12 along the thickness direction on the outer side of the liquid cooling plate 1. In this way, when the expansion force of the battery cell 2 acts on the first plate body 11 or the second plate body 12 along the thickness direction of the liquid cooling plate 1, the elastic member 13 can absorb the force and restore the deformation along the thickness direction of the liquid cooling plate 1.

[0053] Among them, multiple first limiting ribs 111 and multiple second limiting ribs 121 are staggered along the width direction of the liquid cooling plate 1, so that after the liquid cooling plate 1 is deformed by force, the multiple first limiting ribs 111 and the multiple second limiting ribs 121 can provide strength support at multiple positions along the width direction of the liquid cooling plate 1, thereby increasing the structural stability of the liquid cooling plate 1; at the same time, there are also multiple elastic members 13, and the multiple elastic members 13 are spaced apart along the width direction of the liquid cooling plate 1, so that the multiple elastic members 13 can buffer and absorb the force at different positions in the width direction of the liquid cooling plate 1, and restore the structural deformation of the liquid cooling plate 1.

[0054] Furthermore, the first limiting rib 111, the second limiting rib 121 and the elastic member 13 are all extended along the length direction of the liquid cooling plate 1. In this way, the first limiting rib 111 and the second limiting rib 121 can provide strength support at multiple positions in the length direction of the liquid cooling plate 1. Similarly, the elastic member 13 can buffer and absorb the force at different positions in the width direction of the liquid cooling plate 1, and restore the structural deformation of the liquid cooling plate 1.

[0055] Thereby, the structural stability and reliability of the liquid cooling plate 1 can be greatly improved.

[0056] In some embodiments, the extension length of the first limiting rib 111 or the second limiting rib 121 along the third direction is greater than half of the maximum spacing between the first plate body 11 and the second plate body 12. As a result, the spacing between the first limiting rib 111 and the second plate body 12, and the spacing between the second limiting rib 121 and the first plate body 11 are both small, so that the liquid cooling plate 1 can be effectively supported between the first plate body 11 and the second plate body 12 by the first limiting rib 111 and the second limiting rib 121 before irreversible deformation occurs, thereby ensuring the structural stability of the liquid cooling plate 1.

[0057] In some embodiments, at least two adjacent elastic members 13 are symmetrically distributed on both sides of the corresponding first limiting rib 111 or second limiting rib 121, so that the force acting on the first plate body 11 or the second plate body 12 can be diffused in symmetrical directions through the two adjacent elastic members 13, respectively, to achieve effective dispersion of the expansion force, avoid the expansion force from being concentrated on a local position of the liquid cooling plate 1, and reduce the deformation of the local position.

[0058] In some embodiments, the extension length of the first limiting rib 111 or the second limiting rib 121 along the third direction is L, and satisfies: 0.6mm≤L≤1mm. For example, L is set to 0.7mm, or L is set to 0.8mm, or to other sizes within the above range.

[0059] Thus, the gap between the first limiting rib 111 and the second plate body portion 12, and the gap between the second limiting rib 121 and the first plate body portion 11 can be maintained within a relatively small range. In this way, after the liquid cooling plate 1 is deformed to a certain extent under force, the first limiting rib 111 or the second limiting rib 121 plays an effective supporting role to prevent the liquid cooling plate 1 from excessive deformation.

[0060] Furthermore, in some embodiments, the elastic member 13 can divide the accommodating chamber 16 into a plurality of sub-channels, and the liquid cooling plate 1 is provided with a water inlet 17 and a water outlet 18 communicating with the accommodating chamber 16. In this way, the operator can connect the water inlet 17 and the water outlet 18 of the liquid cooling plate 1 to the external cooling water circuit, so that the external cooling water can enter the accommodating chamber 16 from the water inlet 17, and then flow out from the water outlet 18, and in the process of flowing in the accommodating chamber 16, it can realize effective heat exchange with the battery cell 2, thereby reducing the temperature of the battery cell 2.

[0061] The utility model also provides a battery assembly 100 .

[0062] According to the battery assembly 100 of the embodiment of the utility model, the battery cell 2 and the liquid cooling plate 1 described in any of the above embodiments are connected to the first plate body 11 and the second plate body 12 so that the liquid cooling plate 1 can cool and reduce the temperature of the battery cell 2 to avoid overheating of the battery cell 2.

[0063] In actual design, the battery cell 2 can be set to one, two or more, and multiple battery cells 2 can share one liquid cooling plate 1 to reduce cooling costs. Figure 1 As shown, the battery cells 2 can be set to 4, and 2 of the battery cells 2 are arranged above the liquid cooling plate 1, and the other 2 battery cells 2 are arranged below the liquid cooling plate 1, and a large surface of each battery cell 2 is in contact with the first plate body 11 of the liquid cooling plate 1 to achieve effective cooling and heat dissipation of the battery cells 2.

[0064] By fitting the above-mentioned liquid cooling plate 1, and by setting an elastic member 13 in the liquid cooling plate 1, the liquid cooling plate 1 can be effectively restored to deformation, and the first limiting rib 111 and the second limiting rib 121 are conducive to ensuring the deformable range of the elastic member 13, and then when the battery cell 2 expands and squeezes the liquid cooling plate 1, it will not cause the liquid cooling plate 1 to be irreversibly deformed, thereby improving the safety of the liquid cooling plate 1, ensuring that the liquid cooling plate 1 always fits the large surface of the battery cell 2, ensuring an effective heat exchange contact surface, and ensuring the heat dissipation effect. Even if the battery cell 2 is repeatedly charged and discharged, it can still be ensured that the battery cell 2 will not be troubled by the poor heat dissipation performance caused by the expansion force in the later stage, and completely solving the expansion force problem of the large surface liquid cooling technology of the battery cell 2.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0066] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A liquid cooling plate, It is characterized in that include: A first plate body and a second plate body, wherein the first plate body and the second plate body are arranged opposite to each other, and the first plate body and the second plate body are used to form a containing cavity, and the containing cavity is used to circulate a heat exchange liquid; The first plate body is provided with a plurality of first limiting ribs extending in the second direction and arranged side by side and spaced apart along the first direction, the second plate body is provided with a plurality of second limiting ribs extending in the second direction and arranged side by side and spaced apart along the first direction, a first free end of the first limiting rib away from the first plate body is gap-matched with the second plate body, a second free end of the second limiting rib away from the second plate body is gap-matched with the first plate body, and a plurality of the first limiting ribs and a plurality of the second limiting ribs are staggeredly distributed; An elastic member is disposed between each adjacent first limiting rib and second limiting rib, wherein the elastic member has a deformation margin along a third direction, and the first direction, the second direction and the third direction are arranged to intersect each other.

2. The liquid cooling plate according to claim 1, It is characterized in that The outer periphery of the first plate body portion is welded to the outer periphery of the second plate body portion, and the first plate body portion and the second plate body portion enclose the accommodating cavity.

3. The liquid cooling plate according to claim 2, It is characterized in that One side of the elastic member along the first direction is connected to the first connecting end of the adjacent first limiting rib close to the first plate body, and the other side of the elastic member along the first direction is abutted against the second connecting end of the adjacent second limiting rib close to the second plate body.

4. The liquid cooling plate according to claim 1, It is characterized in that It also includes a water inlet sealing component and a water outlet sealing component, the first plate body portion and the second plate body portion are integrally formed, the water inlet sealing component is sealedly connected to one end of the liquid cooling plate along the second direction, the water outlet sealing component is sealedly connected to the other end of the liquid cooling plate along the second direction, and the water inlet sealing component, the water outlet sealing component, the first plate body portion and the second plate body portion enclose the accommodating cavity.

5. The liquid cooling plate according to claim 4, It is characterized in that Both ends of the elastic member along the second direction are connected to the first connecting end of the first limiting rib close to the first plate body, and / or both ends of the elastic member along the second direction are connected to the second connecting end of the second limiting rib close to the second plate body.

6. The liquid cooling plate according to claim 1, It is characterized in that The extension directions of the elastic members located on both sides of the first limiting rib or the second limiting rib in the first direction intersect with each other.

7. The liquid cooling plate according to claim 1, It is characterized in that The first direction is a width direction of the liquid cooling plate, the second direction is a length direction of the liquid cooling plate, and the third direction is a thickness direction of the liquid cooling plate.

8. The liquid cooling plate according to claim 1, It is characterized in that An extension length of the first limiting rib or the second limiting rib along the third direction is greater than half of a maximum distance between the first plate body portion and the second plate body portion.

9. The liquid cooling plate according to claim 1, It is characterized in that An extension length of the first limiting rib or the second limiting rib along the third direction is L, and satisfies: 0.6 mm≤L≤1 mm.

10. A battery assembly, It is characterized in that The invention comprises a battery core and the liquid cooling plate according to any one of claims 1 to 9, wherein the battery core is bonded and connected to one of the first plate body part and the second plate body part.

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