Liquid cooling plate, battery pack and vehicle

Abstract

The utility model provides a liquid cooling plate, a battery pack and a vehicle. Relates to the technical field of battery heat dissipation. The liquid cooling plate comprises a shell and an inner layer plate. A containing cavity is defined by the shell. The inner-layer plate is located in the containing cavity, and a liquid cooling cavity is formed between the inner-layer plate and the shell. Protruding ribs are arranged on the inner wall of the shell and inserted into the inner layer plate, and a movable gap is formed between the inserting end of each protruding rib and the inner layer plate. The liquid cooling plate is internally filled with cooling liquid, and the cooling liquid can absorb heat released by the battery monomers through the shell when flowing, so that the battery pack can keep a good heat dissipation function. And when the liquid cooling plate is clamped between the two single batteries, the single batteries expand, so that the thickness of the liquid cooling plate can be reduced. Therefore, enough deformation accommodating space can be provided for the single battery, so that the single battery can be prevented from being expanded and blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of battery heat dissipation, and particularly relates to a liquid cooling plate, a battery pack and a vehicle. Background Art

[0002] At present, the heat dissipation of the battery pack in new energy electric vehicles has become an important factor affecting the working performance of the battery pack.

[0003] In the battery pack, in order to improve the heat dissipation efficiency of the battery, an industry-designed liquid cooling plate that can be in large-surface contact with the battery cell for heat dissipation is provided. This liquid cooling plate is clamped in the gap between two adjacent battery cells and is in large-surface contact with the battery cell. By increasing the contact area, the heat dissipation efficiency can be improved.

[0004] However, since the liquid cooling plate occupies the reserved expansion gap between the battery cells, when the battery cells heat up and expand, there is a lack of sufficient deformation accommodation space, which in turn leads to the expansion of the battery cells being blocked. Summary of the Utility Model

[0005] The utility model discloses a liquid cooling plate, a battery pack and a vehicle. The liquid cooling plate is arranged between two adjacent battery cells in the battery pack. When the battery cells heat up and expand, the thickness of the liquid cooling plate can be reduced under the extrusion of the battery cells, so as to provide sufficient deformation accommodation space for the battery cells, thus avoiding the blockage of the expansion of the battery cells.

[0006] In order to achieve the above object, the utility model discloses a liquid cooling plate, which comprises: a housing and an inner layer plate. The housing encloses to form an accommodation cavity. The inner layer plate is located in the accommodation cavity, and a liquid cooling cavity is arranged between the inner layer plate and the housing. A convex rib is arranged on the inner wall of the housing, the convex rib is inserted into the inner layer plate, and an activity gap is arranged between the insertion end of the convex rib and the inner layer plate.

[0007] Optionally, the housing comprises a first side plate, a second side plate, a top plate and a bottom plate. The top plate connects the tops of the first side plate and the second side plate, and the bottom plate connects the bottoms of the first side plate and the second side plate. The first side plate, the second side plate, the top plate and the bottom plate enclose to form the accommodation cavity.

[0008] Optionally, the convex rib is arranged on the inner wall of the first side plate and / or the second side plate.

[0009] Optionally, the inner layer plate comprises a plurality of unit structures. In the direction from the top plate to the bottom plate, the plurality of unit structures are arranged and connected. A groove is formed by enclosing two adjacent unit structures, and the convex rib is inserted into the groove;

[0010] An active gap is provided between the raised rib and the bottom of the groove.

[0011] Optionally, the raised rib inclines towards the bottom plate, and the direction of the side wall of the groove is the same as the inclination direction of the raised rib.

[0012] Optionally, the unit structure includes two first diagonal ribs, two second diagonal ribs, two vertical ribs and a connecting rib;

[0013] The two first diagonal ribs are connected to form a V-shaped structure, and the two second diagonal ribs are connected to form a V-shaped structure. Among them, the inclination directions of the first diagonal rib and the second diagonal rib are the same, and the first diagonal rib is closer to the bottom plate than the second diagonal rib;

[0014] The two vertical ribs are arranged in parallel between the two V-shaped structures. One end of one vertical rib is respectively connected to one first diagonal rib and one second diagonal rib, and the two ends of the other vertical rib are respectively connected to the other first diagonal rib and the other second diagonal rib;

[0015] The two first diagonal ribs, the two second diagonal ribs and the two vertical ribs enclose a cavity, and the connecting rib is connected to the intersection part of the two first diagonal ribs, and the connecting rib is located outside the cavity.

[0016] Optionally, the first diagonal rib and the connecting rib of one unit structure and the second diagonal rib of an adjacent unit structure enclose to form the groove, and the connecting rib is located at the bottom of the groove.

[0017] Optionally, at the intersection of the first diagonal rib and the vertical rib on one side of the unit structure, a fillet is provided.

[0018] Optionally, the unit structure further includes a reinforcing rib, and the reinforcing rib connects the two vertical ribs of the unit structure.

[0019] Optionally, in the direction from the top plate to the bottom plate, the lengths of the plurality of raised ribs first gradually decrease and then gradually increase.

[0020] Compared with the related art, the beneficial effects of the present application are at least as follows:

[0021] Since the liquid cooling plate includes a housing and an inner layer plate. The housing encloses to form a receiving cavity. The inner layer plate is located in the receiving cavity, and a liquid cooling cavity is provided between the inner layer plate and the housing. The inner wall of the housing is provided with protruding ribs, the protruding ribs are inserted into the inner layer plate, and a movable gap is provided between the insertion end of the protruding ribs and the inner layer plate. When in use, the liquid cooling plate is installed in the battery pack and clamped between adjacent battery cells. At this time, the housing of the liquid cooling plate abuts against the battery cells, and a coolant flows through the liquid cooling plate. When the coolant flows, it can absorb the heat released by the battery cells through the housing, so that the battery pack can maintain a good heat dissipation function.

[0022] When the battery cell generates heat and expands, the volume of the battery cell becomes larger, which will squeeze the housing of the liquid cooling plate. Since a liquid cooling cavity is provided between the inner layer plate and the housing, the liquid cooling cavity will be compressed and become smaller, so that the thickness of the liquid cooling plate can be reduced. Then, since a movable gap is provided between the insertion end of the protruding ribs and the inner layer plate, when the housing is squeezed by the battery cell, the protruding ribs can be inserted deeper into the inner layer plate, so that the thickness of the liquid cooling plate can be further reduced. This can provide enough deformation accommodation space for the battery cell, so that the expansion of the battery cell can be avoided from being blocked. Then, since the protruding ribs are inserted into the inner layer plate, the housing and the inner layer plate can be reliably connected, thereby enhancing the stability of the liquid cooling plate, so that the service life of the liquid cooling plate can be extended.

[0023] Another object of the present invention is to provide a battery pack, so that when the battery cells inside the battery pack expand, they can be prevented from being hindered by the liquid cooling plate, thereby extending the service life of the battery pack.

[0024] To achieve the above object, the technical solution of the present invention is realized as follows:

[0025] A battery pack, the battery pack includes the liquid cooling plate described in any one of the above.

[0026] Optionally, the battery pack further includes a plurality of battery cells; the plurality of battery cells are arranged in a straight line and stacked, the liquid cooling plate is disposed between adjacent battery cells, and the housing abuts against the largest surface of the battery cells.

[0027] Another object of the present invention is to provide a vehicle to extend the service life of the vehicle.

[0028] To achieve the above object, the technical solution of the present invention is realized as follows:

[0029] A vehicle, the vehicle includes the battery pack described in any one of the above.

[0030] Compared with the prior art, the battery pack and the vehicle of the present invention have the same advantages as the above-mentioned liquid cooling plate, which will not be elaborated here. Brief Description of the Drawings

[0031] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0032] Figure 1 is a schematic structural diagram of a battery pack provided by an embodiment of the present application;

[0033] Figure 2 is a schematic structural diagram of a liquid cooling plate provided by an embodiment of the present application;

[0034] Figure 3 is Figure 2 a partial enlarged view at position F in;

[0035] Figure 4 is Figure 2 a schematic structural diagram of the outer shell in;

[0036] Figure 5 is Figure 4 a partial enlarged view at position G in;

[0037] Figure 6 is Figure 2 a schematic structural diagram of the inner layer plate in;

[0038] Figure 7 is Figure 6 a partial enlarged view at position H in.

[0039] Reference Numerals:

[0040] 1 - liquid cooling plate, 11 - outer shell, 111 - raised rib, 112 - first side plate, 113 - second side plate, 114 - top plate, 115 - bottom plate, 12 - inner layer plate, 121 - unit structure, 1211 - first diagonal rib, 1212 - second diagonal rib, 1213 - vertical rib, 1214 - connecting rib, 1215 - cavity, 1216 - rounded corner, 1217 - reinforcing rib, 122 - groove, 13 - accommodation cavity, 14 - liquid cooling cavity, 15 - moving gap, 2 - battery cell, 100 - battery pack. Detailed Embodiments

[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0042] In this application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements, or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0043] Moreover, in addition to being used to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0044] In addition, the terms "mounted", "arranged", "provided with", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can also be internal communication between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] In addition, terms such as "first", "second", etc. are mainly used to distinguish different devices, elements, or components. The specific types and structures may be the same or different, and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements, or components. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0046] The technical solution of this application will be further described below in conjunction with specific embodiments and the drawings.

[0047] Figure 1 is a schematic structural diagram of a battery pack 100 provided by an embodiment of this application, Figure 2 is a schematic structural diagram of a liquid cooling plate 1 provided by an embodiment of this application, Figure 3 is Figure 2 a partial enlarged view at position F in

[0048] See Figure 1 , Figure 2 and Figure 3, the liquid cooling plate 1 includes: a housing 11 and an inner layer plate 12. The housing 11 encloses to form a receiving cavity 13. The inner layer plate 12 is located within the receiving cavity 13, and a liquid cooling cavity 14 is provided between the inner layer plate 12 and the housing 11. A protruding rib 111 is provided on the inner wall of the housing 11, the protruding rib 111 is inserted into the inner layer plate 12, and a movable gap 15 is provided between the insertion end of the protruding rib 111 and the inner layer plate 12.

[0049] Figure 1 Fig. shows the internal structure of a battery pack 100 according to an embodiment of the present invention, wherein a plurality of battery cells 2 are stacked side by side in the front and rear direction, and a liquid cooling plate 1 is placed between two adjacent battery cells 2. The liquid cooling plate 1 is in contact with the large surfaces of the two battery cells 2 on both sides at the same time to cool and dissipate heat from them. The large surfaces of the battery cells 2 are the two larger area sides perpendicular to the thickness direction.

[0050] When using the liquid cooling plate 1, the liquid cooling plate 1 is installed in the battery pack 100 and clamped between adjacent battery cells 2. At this time, the housing 11 of the liquid cooling plate 1 abuts against the battery cell 2, and a coolant flows through the liquid cooling plate 1. When the coolant flows, it can absorb the heat released by the battery cell 2 through the housing 11, so that the battery pack 100 can maintain a good heat dissipation function.

[0051] When the battery cell 2 generates heat and expands, the volume of the battery cell 2 becomes larger, which will squeeze the housing 11 of the liquid cooling plate 1. Since there is a liquid cooling cavity 14 between the inner layer plate 12 and the housing 11, the liquid cooling cavity 14 will be compressed and become smaller, so that the thickness of the liquid cooling plate 1 can be reduced. Then, since there is a movable gap 15 between the insertion end of the protruding rib 111 and the inner layer plate 12, when the housing 11 is squeezed by the battery cell 2, the protruding rib 111 can be inserted deeper into the inner layer plate 12, further reducing the thickness of the liquid cooling plate 1. This can provide enough deformation accommodation space for the battery cell 2, so that the expansion of the battery cell can be prevented from being blocked.

[0052] Then, since the protruding rib 111 is inserted into the inner layer plate 12, the housing 11 and the inner layer plate 12 can be reliably connected, thereby enhancing the stability of the liquid cooling plate 1, so that the service life of the liquid cooling plate 1 can be extended.

[0053] It should be noted that the above-mentioned housing 11 and inner layer plate 12 can be made of flexible materials or rigid materials, and the embodiments of the present application do not limit this.

[0054] It should also be noted that the cross-section of the above-mentioned housing 11 is strip-shaped, and the cross-section can be a regular rectangle or a rectangle with chamfers. The embodiments of the present application do not limit this.

[0055] It should also be noted that the above-mentioned raised ribs 111 may protrude inward perpendicular to the surface of the outer shell 11 or may protrude inward at an angle not perpendicular to the surface of the outer shell 11. The embodiments of the present application do not limit this.

[0056] It should also be noted that the above-mentioned raised ribs 111 and the inner layer plate 12 may be in a sliding connection or a rolling connection, or may be other contact connection methods. The embodiments of the present application do not limit this.

[0057] Optionally, in some embodiments, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the outer shell 11 includes a first side plate 112, a second side plate 113, a top plate 114 and a bottom plate 115. The top plate 114 connects the tops of the first side plate 112 and the second side plate 113, and the bottom plate 115 connects the bottoms of the first side plate 112 and the second side plate 113. The first side plate 112, the second side plate 113, the top plate 114 and the bottom plate 115 enclose an accommodation cavity 13.

[0058] Among them, the first side plate 112, the second side plate 113, the top plate 114 and the bottom plate 115 are all flat plates. In this way, the first side plate 112, the second side plate 113, the top plate 114 and the bottom plate 115 of the outer shell 11 can enclose an outer shell 11 with a rectangular cross-section.

[0059] Since the surface of the battery cell 2 in contact with the liquid cooling plate 1 is generally flat, when the liquid cooling plate 1 is clamped between two adjacent battery cells 2, the effective contact area between the outer shell 11 and the surface of the battery cell 2 is larger, which is beneficial for the outer shell 11 to fully absorb the heat released by the battery cell 2, so the heat dissipation effect of the liquid cooling plate 1 can be improved.

[0060] In addition, setting the cross-section of the outer shell 11 to be rectangular is beneficial for the cross-section adaptation of the outer shell 11 and the inner layer plate 12, and further beneficial for reducing the volume of the liquid cooling plate 1, so it is beneficial for reducing the volume of the battery pack 100.

[0061] Optionally, in some embodiments, referring to Figure 1 , Figure 2 and Figure 3 , the inner wall of the first side plate 112 is provided with raised ribs 111. Since the battery cell 2 generally presses the first side plate 112 of the outer shell 11, after the raised ribs 111 are provided on the inner wall of the first side plate 112, the raised ribs 111 can play a guiding role in the movement of the first side plate 112, and can enable the outer shell 11 to deform in a specified direction.

[0062] And / or, the inner wall of the second side plate 113 is provided with a raised rib 111. Since the battery cell 2 generally also presses against the second side plate 113 of the housing 11, after the raised rib 111 is provided on the inner wall of the second side plate 113, the raised rib 111 can play a guiding role in the movement of the second side plate 113, and can also enable the housing 11 to deform in a specified direction.

[0063] Optionally, in some embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 , the inner layer plate 12 includes a plurality of unit structures 121. In the direction from the top plate 114 to the bottom plate 115, the plurality of unit structures 121 are arranged and connected. Adjacent two unit structures 121 enclose a groove 122, and the raised rib 111 is inserted into the groove 122. An activity gap 15 is provided between the raised rib 111 and the bottom of the groove 122.

[0064] Since in the direction from the top plate 114 to the bottom plate 115 ( Figure 2 the Z direction in

[0065] ), the deformation of the battery cell 2 at each position on the contact surface is uneven, so the inner layer plate 12 will be locally bent. Setting the inner layer plate 12 in the form of a plurality of unit structures 121 arranged and connected in the direction from the top plate 114 to the bottom plate 115 can make the inner layer plate 12 more likely to be bent, and thus is beneficial to the deformation of the liquid cooling plate 1.

[0066] Then, since adjacent two unit structures 121 enclose a groove 122 and the raised rib 111 is inserted into the groove 122. In this way, the groove 122 can play a guiding role in the movement of the raised rib 111, and thus can play a guiding role in the movement of the first side plate 112 or the second side plate 113, so that the housing 11 is further deformed in a specified direction.

[0067] It should be noted that the shape of the above unit structure 121 can be a closed shape or a non-closed shape, and the embodiments of the present application do not limit this.

[0068] Optionally, in some embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 andFigure 5 , the raised rib 111 is inclined towards the bottom plate 115, and the direction of the side wall of the groove 122 is the same as the inclined direction of the raised rib 111.

[0069] In the embodiment of the present application, since the raised rib 111 is inclined towards the bottom plate 115, when the raised rib 111 is inserted into the bottom of the groove 122 along the groove 122, it is easier to bend under the action of an external force. After bending, the first side wall or the second side wall can further move towards the inner layer plate 12, and further reduce the thickness of the liquid cooling plate 1. This can further provide sufficient deformation accommodation space for the battery cell 2, and thus further avoid the obstruction of the battery single expansion.

[0070] Next, since the direction of the side wall of the groove 122 is the same as the inclined direction of the raised rib 111. This can be adapted to the inclined raised rib 111 and is convenient for better guiding the movement of the raised rib 111.

[0071] Optionally, in some embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 , the unit structure 121 includes two first diagonal ribs 1211, two second diagonal ribs 1212, two vertical ribs 1213 and a connecting rib 1214. The two first diagonal ribs 1211 are connected to form a V-shaped structure, and the two second diagonal ribs 1212 are connected to form a V-shaped structure. Among them, the inclined directions of the first diagonal rib 1211 and the second diagonal rib 1212 are the same, and the first diagonal rib 1211 is closer to the bottom plate 115 than the second diagonal rib 1212. The two vertical ribs 1213 are arranged in parallel between the two V-shaped structures. One end of one vertical rib 1213 is respectively connected to one first diagonal rib 1211 and one second diagonal rib 1212, and the other end of the other vertical rib 1213 is respectively connected to the other first diagonal rib 1211 and the other second diagonal rib 1212. The two first diagonal ribs 1211, the two second diagonal ribs 1212, and the two vertical ribs 1213 enclose a cavity 1215, and the connecting rib 1214 is connected to the intersection part of the two first diagonal ribs 1211, and the connecting rib 1214 is located outside the cavity 1215.

[0072] In the embodiments of the present application, since two first diagonal ribs 1211 are connected to form a V-shaped structure, two second diagonal ribs 1212 are connected to form a V-shaped structure, and two vertical ribs 1213 are arranged in parallel between the two V-shaped structures. The two ends of one vertical rib 1213 are respectively connected to one first diagonal rib 1211 and one second diagonal rib 1212, and the two ends of the other vertical rib 1213 are respectively connected to the other first diagonal rib 1211 and the other second diagonal rib 1212. In this way, the unit structure 121 is symmetric about its own central axis. When the unit structure 121 is subjected to symmetric pressures from the first side plate 112 and the second side plate 113, symmetric deformations can be generated, thereby making its own structure more stable. Then, since the first diagonal rib 1211 and the second diagonal rib 1212 have the same inclination direction, the first diagonal rib 1211 and the second diagonal rib 1212 are located on the same side of the unit structure 121. In this way, the two groove walls of the groove 122 can be made parallel, which is beneficial to making the structure of the groove 122 more stable and also beneficial to the mating connection with the convex rib 111.

[0073] Then, since the two first diagonal ribs 1211, the two second diagonal ribs 1212, and the two vertical ribs 1213 enclose a cavity 1215. The cavity 1215 formed in this way is isolated from the external liquid cooling cavity 14. After coolant is passed through its interior, it can form a liquid cooling channel. In this way, after the external liquid cooling cavity 14 of the unit structure 121 is damaged, the liquid cooling channel can still play a liquid cooling role, thereby improving the service life of the liquid cooling plate 1 and also improving the service life of the battery pack 100. Then, since the connecting rib 1214 is connected to the intersection part of the two first diagonal ribs 1211 and the connecting rib 1214 is located outside the cavity 1215. In this way, the connecting rib 1214 is located on the axis of symmetry of the unit structure 121, and the connecting rib 1214 can be used to connect to another unit structure 121, thereby making the structure of the formed inner layer plate 12 more stable.

[0074] Optionally, in some embodiments, refer to Figure 1 , Figure 2 and Figure 3 , the first diagonal rib 1211 and the connecting rib 1214 of one unit structure 121 and the second diagonal rib 1212 of another adjacent unit structure 121 enclose a groove 122, and the connecting rib 1214 is located at the bottom of the groove 122. In this way, a groove 122 can be formed between two adjacent structural units. The connecting rib 1214 on the one hand plays a role in connecting adjacent unit structures 121 and is also used to enclose and form the groove 122, so that the use of the connecting rib 1214 can be fully utilized. The unit structure 121 is simplified, that is, the structure of the inner layer plate 12 is simplified. In addition, the groove 122 is located between two adjacent unit structures 121, which is beneficial to the bending of adjacent unit structures 121 and also beneficial to the bending deformation of the inner layer plate 12.

[0075] Optionally, in some embodiments, referring to Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 , a fillet 1216 is provided at the junction of the first diagonal rib 1211 and the vertical rib 1213 on one side of the unit structure 121. In this way, when the convex rib 111 is inserted along the groove 122 to the bottom of the groove 122, it will bend under the action of an external force. After bending, the first side wall or the second side wall can further move towards the inner layer board 12, so that the thickness of the liquid cooling plate 1 can be further reduced.

[0076] In order to make the convex rib 111 bend more easily and without causing damage to itself, setting the junction of the first diagonal rib 1211 and the vertical rib 1213 as a fillet 1216 can achieve this technical effect.

[0077] It should be noted that the radius of the fillet 1216 depends on the size of the unit structure 121.

[0078] Optionally, in some embodiments, referring to Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 , the unit structure 121 further includes a reinforcing rib 1217, and the reinforcing rib 1217 connects the two vertical ribs 1213 of the unit structure 121.

[0079] In this way, a reinforcing member is added to the cavity 1215 formed by enclosing the unit structure 121. When the unit structure 121 is deformed under the extrusion of the first side plate 112 and the second side plate 113, after the external force is removed, the reinforcing rib 1217 can make the two vertical ribs 1213 of the unit structure 121 move away from each other, making the unit structure 121 elastic, and further making the inner layer board 12 elastic, so that the liquid cooling plate 1 has elasticity.

[0080] It should be noted that the reinforcing rib 1217 can be perpendicular to the two vertical ribs 1213 at the same time, or can be in an acute angle state with the two vertical ribs 1213. The embodiments of the present application do not limit this.

[0081] Optionally, in some embodiments, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , in the direction from the top plate 114 to the bottom plate 115, the lengths of the plurality of convex ribs 111 first gradually decrease and then gradually increase.

[0082] When the liquid cooling plate 1 is installed in the battery pack 100, it is clamped between two adjacent battery cells 2, and both the first side wall and the second side wall are in contact with the surface of the battery cell 2. When the battery cell 2 expands, the expansion amount is larger at the positions of the battery cell 2 close to the top plate 114 and the bottom plate 115, and smaller at the positions away from the top plate 114 and the bottom plate 115. That is, in the direction from the top plate 114 to the bottom plate 115, the expansion amount of the battery cell 2 first increases and then decreases.

[0083] In the direction from the top plate 114 to the bottom plate 115, the lengths of the multiple protruding ribs 111 are set in a form that gradually decreases first and then gradually increases, which can just match the expansion amount of the battery cell 2 in this direction, thereby making the pressure distribution between the liquid cooling plate 1 and the battery cell 2 more uniform, and further extending the service life of the liquid cooling plate 1.

[0084] See Figure 1 , the embodiment of the present application also discloses a battery pack 100, which includes any one of the above liquid cooling plates 1.

[0085] By using the above liquid cooling plate 1 in the battery pack 100, based on the structure of the liquid cooling plate 1, the working reliability of the battery pack 100 can be further improved. In addition, when the battery cells 2 inside the battery pack 100 expand, they can avoid being hindered by the liquid cooling plate 1, thereby extending the service life of the battery pack 100.

[0086] Optionally, in some embodiments, see Figure 1 , Figure 2 and Figure 3 , the battery pack 100 further includes a plurality of battery cells 2; the plurality of battery cells 2 are arranged and stacked in a straight line direction ( Figure 1 the X direction in

[0087] ), the liquid cooling plate 1 is arranged between adjacent battery cells 2, and the outer shell 11 is in contact with the largest surface of the battery cell 2. Among them, the battery cell 2 can be in a cube shape, and the plurality of battery cells 2 are arranged and stacked in a straight line, and the arrangement direction can be the direction consistent with the length of the vehicle body. A gap for installing the liquid cooling plate 1 is reserved between adjacent battery cells 2, and the liquid cooling plate 1 can be inserted and fixed in this gap, and the outer shell 11 of the liquid cooling plate 1 can be in contact with the largest surfaces of the battery cells 2 at different positions respectively, so as to realize large-area heat dissipation and cooling with the battery cells 2. When the battery cells 2 on both sides of the liquid cooling plate 1 expand, they will squeeze the first side surface and the second side surface of the outer shell 11, thereby reducing the thickness of the liquid cooling plate 1. This can provide enough deformation accommodation space for the battery cells 2, so that the expansion of the battery cells can be avoided from being blocked.

[0088] After installing the above battery pack 100 on a vehicle, the reliability of the vehicle's power supply can be improved. In addition, since the battery pack 100 has a long service life, the service life of the vehicle can be extended.

[0089] It should be noted that the above vehicle can be a sedan, an off-road vehicle or a bus, or other types of vehicles, and the embodiments of the present application do not limit this.

[0090] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A liquid cooling plate, characterized in that: include: A housing, wherein the housing is enclosed to form a receiving cavity; An inner plate, the inner plate being located in the accommodating cavity, and a liquid cooling cavity being provided between the inner plate and the outer shell; The inner wall of the shell is provided with a raised rib, the raised rib is inserted into the inner plate, and a movable gap is provided between the insertion end of the raised rib and the inner plate.

2. The liquid cooling plate according to claim 1, characterized in that: The shell includes a first side plate, a second side plate, a top plate and a bottom plate, the top plate connects the tops of the first side plate and the second side plate, the bottom plate connects the bottoms of the first side plate and the second side plate, and the first side plate, the second side plate, the top plate and the bottom plate enclose the accommodating cavity.

3. The liquid cooling plate according to claim 2, characterized in that: The inner wall of the first side plate and / or the second side plate is provided with raised ribs.

4. The liquid cooling plate according to claim 3, characterized in that: The inner plate comprises a plurality of unit structures, and in the direction from the top plate to the bottom plate, the plurality of unit structures are arranged and connected, and two adjacent unit structures are enclosed to form a groove, and the raised ribs are inserted into the groove; A movable gap is arranged between the raised rib and the bottom of the groove.

5. The liquid cooling plate according to claim 4, characterized in that: The protruding rib is inclined toward the direction approaching the bottom plate, and the direction of the groove side wall is the same as the inclined direction of the protruding rib.

6. The liquid cooling plate according to claim 5, characterized in that: The unit structure includes two first oblique ribs, two second oblique ribs, two vertical ribs and one connecting rib; Two of the first oblique ribs are connected to form a V-shaped structure, and two of the second oblique ribs are connected to form a V-shaped structure, wherein the first oblique ribs and the second oblique ribs have the same inclination direction, and the first oblique ribs are closer to the bottom plate than the second oblique ribs; Two vertical ribs are arranged in parallel between the two V-shaped structures, two ends of one vertical rib are respectively connected to one first oblique rib and one second oblique rib, and two ends of another vertical rib are respectively connected to another first oblique rib and another second oblique rib; Two of the first oblique ribs, two of the second oblique ribs, and two of the vertical ribs enclose a cavity, and the connecting rib is connected to the intersection of the two first oblique ribs, and the connecting rib is located outside the cavity.

7. The liquid cooling plate according to claim 6, characterized in that: The first oblique ribs and the connecting ribs of one of the unit structures and the second oblique ribs of another adjacent unit structure form the groove, and the connecting ribs are located at the bottom of the groove.

8. The liquid cooling plate according to claim 7, characterized in that: On one side of the unit structure, a rounded corner is provided at the intersection of the first oblique rib and the vertical rib.

9. The liquid cooling plate according to claim 8, characterized in that: The unit structure further includes a reinforcing rib, which connects two vertical ribs of the unit structure.

10. The liquid cooling plate according to claim 9, characterized in that: In the direction from the top plate to the bottom plate, the lengths of the plurality of raised ribs first gradually decrease and then gradually increase.

11. A battery pack, characterized in that: The liquid cooling plate comprises the liquid cooling plate according to any one of claims 1 to 10.

12. The battery pack according to claim 11, characterized in that: The battery pack also includes a plurality of battery cells; The plurality of battery cells are stacked and arranged in a straight line, the liquid cooling plate is arranged between adjacent battery cells, and the housing abuts against the largest surface of the battery cells.

13. A vehicle, characterized in that: A battery pack comprising any one of claims 11-12.

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