Battery module assembly, battery pack and vehicle

Abstract

The embodiments of the present invention provide a battery module assembly, a battery pack and a vehicle. The battery module assembly comprises a battery module, busbars and a first liquid-cooling plate, wherein the battery module comprises a plurality of cells arranged in a first direction; there are a plurality of busbars, each busbar being connected to terminals of two adjacent cells to form a busbar row; and the first liquid-cooling plate extends in the first direction, and is attached to the busbar row in a second direction perpendicular to the first direction. Therefore, the battery module assembly according to the embodiments of the present invention has the advantages of improving the fast charging capability and improving the heat dissipation capability at the terminals.

Description

Battery module components, battery packs and vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on Chinese patent application number 202311677004.9, filed on December 7, 2023, and Chinese patent application number 202410904419.3, filed on July 5, 2024, and claims the priority of the above two Chinese patent applications. The entire contents of the above two Chinese patent applications are hereby introduced into this application as a reference. Technical Field

[0003] The present invention relates to the technical field of batteries, and in particular to a battery module assembly, a battery pack and a vehicle having the battery module assembly. Background Art

[0004] Power batteries generate heat during the charging process, and the greater the current passing through the battery cell, the greater the heat generated, and the corresponding risk of thermal runaway is also higher. This is especially true for high-power fast-charging power batteries. Currently, in order to shorten the charging time of power batteries, the maximum fast-charging current of the battery has been set to more than 600A, especially near the poles where charging and discharging play a key role. In related technologies, power batteries currently still use a liquid cooling plate at the bottom or side to control the temperature of fast-charging batteries. However, this method has limited heat dissipation effect on the top of the battery cell, which in turn causes the battery module to have poor fast-charging capability. Summary of the Invention

[0005] The present invention aims to at least partially address one of the technical problems in the related art. To this end, embodiments of the present invention provide a battery module assembly that has the advantage of improving heat dissipation at the terminal.

[0006] An embodiment of the present invention further provides a battery pack.

[0007] An embodiment of the present invention further provides a vehicle.

[0008] The battery module includes a plurality of battery cells arranged along a first direction, and there are a plurality of bar tabs, each of which is connected to the poles of two adjacent battery cells to form a bar tab row; the first liquid cooling plate extends along the first direction, and the first liquid cooling plate is attached to the bar tab row along a second direction perpendicular to the first direction.

[0009] The battery module assembly of the embodiment of the present invention, by providing a first liquid cooling plate on the bar connected to the pole, can directly dissipate the heat generated on the pole through the first liquid cooling plate in a timely and rapid manner, thereby improving the overall cooling capacity of the liquid cooling assembly for the battery module, preventing heat from accumulating near the pole and causing the risk of thermal runaway of the battery cell due to local excessive temperature. It is suitable for fast-charging batteries, which is beneficial to improving the fast-charging capability and safety of use of the battery module.

[0010] Therefore, the battery module assembly of the embodiment of the present invention improves the heat dissipation capacity at the pole, the fast charging capability of the battery module and the safety advantages of use.

[0011] In some embodiments, the first liquid cooling plate includes a connected liquid cooling portion and an overlapping edge, the liquid cooling portion is attached to the bar array, and the overlapping edge is attached to the shoulder of the battery cell.

[0012] In some embodiments, the tab is welded, screwed, riveted, or bonded to the pole of the battery module with conductive adhesive.

[0013] In some embodiments, in a third direction perpendicular to the first direction and the second direction, a ratio between a length L1 of the electrode and a length L3 of the battery module is 0.1-0.4.

[0014] In some embodiments, in the first direction, a ratio between a width L2 of the electrode and a width L4 of the battery module is 0.1-0.99.

[0015] In some embodiments, in a third direction perpendicular to the first direction and the second direction, a ratio of the length of the tab to the length L1 of the pole is 0.1-5.

[0016] In some embodiments, in a third direction perpendicular to the first direction and the second direction, a ratio of the length of the liquid cooling portion to the length of the bar is 0.1-2.

[0017] In some embodiments, the battery module assembly further includes a second liquid cooling plate, which is configured to be disposed on the battery module, and the second liquid cooling plate is disposed opposite to the first liquid cooling plate.

[0018] In some embodiments, a first cooling channel is provided in the first liquid cooling plate, a second cooling channel is provided in the second liquid cooling plate, and each of the first cooling channel and the second cooling channel has a cooling medium for cooling the battery module.

[0019] In some embodiments, the battery module assembly further includes a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe, the first liquid cooling plate, the liquid outlet pipe and the second liquid cooling plate are connected in sequence.

[0020] In some embodiments, the second liquid cooling plate has a heat exchange panel and a flow channel panel arranged opposite to each other along the second direction, the heat exchange panel and the flow channel panel form the second cooling flow channel, the area of ​​the heat exchange panel and the contact area of ​​the battery module is S1, the area of ​​the battery module connected to the heat exchange panel is S2, and the ratio of S1 to S2 is 0.1-1.

[0021] In some embodiments, in the second direction, the thickness of the heat exchange panel is D1, the size of the second cooling channel is H1, 0.02≤D1 / H1≤5; the thickness of the channel panel is D2, the size of the second cooling channel is H1, 0.02≤D2 / H1≤5;

[0022] In some embodiments, in the second direction, the thickness of the side of the first liquid cooling plate connected to the bar is D3, the size of the second cooling channel is H2, and 0.02≤D3 / H2≤2.

[0023] In some embodiments, the battery module assembly further includes a heat conductive layer between the first liquid cooling plate and the bar.

[0024] A battery pack according to an embodiment of the present invention includes a housing and a battery module assembly according to any one of the above-described methods disposed within the housing.

[0025] The vehicle according to the embodiment of the present invention includes the battery pack described above.

[0026] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0028] FIG1 is a perspective view of a battery pack according to an embodiment of the present invention.

[0029] FIG2 is a perspective view of the cooperation between the first liquid cooling plate and the second liquid cooling plate according to an embodiment of the present invention.

[0030] FIG3 is a perspective view of a first liquid cooling plate according to an embodiment of the present invention.

[0031] FIG4 is a perspective view of a second liquid cooling plate according to an embodiment of the present invention.

[0032] FIG5 is a front view of a battery module assembly according to an embodiment of the present invention.

[0033] FIG6 is a perspective view of a battery module assembly according to an embodiment of the present invention.

[0034] FIG. 7 is a front view of a battery module assembly according to another embodiment of the present invention.

[0035] FIG8 is a perspective view of a battery module assembly according to another embodiment of the present invention.

[0036] FIG9 is a perspective view of a battery module according to an embodiment of the present invention.

[0037] FIG10 is a three-dimensional diagram of the battery module and the tab assembly according to an embodiment of the present invention.

[0038] FIG. 11 is a perspective view of another battery module according to an embodiment of the present invention.

[0039] FIG12 is a cross-sectional view of a second liquid cooling plate according to an embodiment of the present invention.

[0040] FIG13 is a cross-sectional view of a first liquid cooling plate according to an embodiment of the present invention.

[0041] FIG14 is a perspective view of a battery cell according to an embodiment of the present invention.

[0042] The accompanying drawings in the specific implementation manner are as follows:

[0043] Battery pack 1000;

[0044] Battery module assembly 100; housing 200;

[0045] Battery module 1; battery cell 11; terminal 111; shoulder 112;

[0046] Patch 2;

[0047] First liquid cooling plate 3; liquid cooling portion 31; first cooling channel 311; heat dissipation surface 312;

[0048] overlapping edge 32;

[0049] Second liquid cooling plate 4; second cooling channel 41; heat exchange panel 42; channel panel 43;

[0050] Liquid inlet pipe 51; Liquid outlet pipe 52. DETAILED DESCRIPTION

[0051] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0052] The following describes a battery module assembly 100, a battery pack 1000, and a vehicle according to an embodiment of the present invention with reference to FIG1 to FIG13.

[0053] The battery module assembly 100 according to the embodiment of the present invention includes a battery module 1 , a bar 2 and a first liquid cooling plate 3 .

[0054] The battery module 1 includes a plurality of battery cells 11 arranged along a first direction (for example, the left-right direction shown in FIG1 ), and a plurality of tabs 2, each of which is connected to the poles 111 of two adjacent battery cells 11 to form a tab row; the first liquid cooling plate 3 extends along the first direction, and the first liquid cooling plate 3 is attached to the tab row along a second direction perpendicular to the first direction (for example, the up-down direction shown in FIG1 ).

[0055] The battery module assembly 100 of the embodiment of the present invention, by providing a first liquid cooling plate 3 on the bar 2 connected to the pole 111, can directly dissipate the heat generated on the pole 111 promptly and quickly through the first liquid cooling plate 3, thereby improving the overall cooling capacity of the liquid cooling assembly for the battery module 1, preventing heat from accumulating at the pole 111 and causing the battery cell temperature to be too high, limiting the charging current, and being suitable for fast-charging batteries, thereby helping to improve the fast-charging capability and safety of the battery module 1.

[0056] Therefore, the battery module assembly 100 of the embodiment of the present invention has the advantages of improving the heat dissipation capacity and fast charging capability at the pole 111.

[0057] Specifically, the tab 2 can connect two adjacent cells 11 in the battery module 1 in series and / or in parallel. The pole 111 is set on the top of the cell 11, the tab 2 is connected to the pole 111, and the first liquid cooling plate 3 is set on the upper surface of the tab 2.

[0058] As shown in FIG7 and FIG8 , the first liquid cooling plate 3 includes a liquid cooling portion 31 and an overlapping edge 32 connected to each other. The liquid cooling portion 31 is attached to the tab array, and the overlapping edge 32 is attached to the shoulder 112 of the battery cell 11 .

[0059] The battery module assembly 100 of the embodiment of the present invention divides the first liquid cooling plate 3 into a connected liquid cooling portion 31 and an overlapping edge 32. The liquid cooling portion 31 is attached to the bar array, and the overlapping edge 32 is attached to the shoulder 112 of the battery cell 11. The overlapping edge 32 can not only dissipate heat from the shoulder 112 of the battery cell 11, but also dissipate heat from the shoulder 112 of the battery cell 11 through the liquid cooling portion 31. This not only helps to reduce or even eliminate the temperature difference between the shoulder 112 of the battery cell 11 and the pole 111 (the overlapping edge 32 has the function of uniform heat distribution), but also reduces the overall cooling capacity of the battery module 1. As a result, the battery module assembly 100 further improves the heat dissipation capacity of the battery module 1.

[0060] Specifically, the battery module 1 includes a plurality of battery cells 11 arranged along the second direction, and each battery cell 11 has a shoulder 112. When the positive and negative electrode posts of the battery cell 11 are both arranged on the top surface of the battery cell 11, and the positive and negative electrode posts are arranged near the middle of the battery cell 11, the shoulders 112 can be formed on both sides of the battery cell 11 along the third direction (for example, the front-to-back direction shown in Figure 1), as shown in Figure 11. When the positive and negative electrode posts are arranged near the edges of the battery cell 11, the shoulders 112 are formed between the explosion-proof valve of the battery cell 11 and the positive electrode post, and between the explosion-proof valve of the battery cell 11 and the negative electrode post. When the positive and negative electrode posts of the battery cell 11 are arranged relative to each other at the top and bottom of the battery cell 11. For example, the positive electrode post is arranged in the middle area of ​​the top surface of the battery cell 11, the shoulders 112 can be formed on both sides of the positive electrode post of the battery cell 11 along the third direction, for example, a blade battery cell 11.

[0061] Tab 2 can be welded, screwed, riveted, or bonded to the post 111 of the battery module 1 using conductive adhesive. Thus, the battery module assembly 100 of this embodiment of the present invention offers the advantage of convenient connection. For example, tab 2 can be connected to the post 111 of the battery cell 11 using processes such as riveting or laser welding, thereby enabling high-voltage series or parallel connection of the entire battery module 1.

[0062] Optionally, the tab 2 may be a copper alloy tab 2 or an aluminum alloy tab 2, and an observation hole is provided on the tab 2. Furthermore, the tab 2 may be formed by a process such as stamping, machining or casting.

[0063] Optionally, the bar 2 and the first liquid cooling plate 3 are connected via various heat-conducting media such as heat-conducting structural adhesive, heat-conducting pad, heat-conducting gel, heat-conducting silicone grease, structural adhesive, etc.

[0064] Optionally, the poles may be square or circular. The poles generally include a positive pole and a negative pole, which may be arranged on the same side of the battery module 1 or opposite to each other.

[0065] In a third direction perpendicular to the first and second directions (for example, the front-to-back direction shown in FIG1 and the third direction shown in FIG6 ), the ratio between the length L1 of the pole 111 and the length L3 of the battery module 1 is 0.1-0.4. This avoids the problem of the top surface of the battery cell 11 not having enough area to accommodate the necessary electrical safety distance between the positive pole and the negative pole of the battery cell 11, which would result in poor safety, and the problem of the top surface of the battery cell 11 not having enough area to accommodate the necessary electrical safety distance between the positive pole and the negative pole of the battery cell 11, which would result in poor safety. It also avoids the problem of the top surface of the battery cell 11 being in contact with the first liquid cooling plate 3, which would result in a small proportion of the area, which would lead to poor heat exchange efficiency at the top of the battery cell 11. Therefore, the battery module assembly 100 has the advantages of both good cooling effect and high structural strength.

[0066] Specifically, the positive electrode column and the negative electrode column of the battery cell 11 are both arranged on the same side of the battery cell 11 , or there may be two or more positive electrode columns + two or more negative electrode columns.

[0067] In the first direction, as shown in Figure 14 , the ratio of the width L2 of the pole 111 to the width L4 of the battery module 1 is 0.1-0.99. This avoids the problem of poor cooling performance caused by an excessively small ratio between the width L2 of the pole 111 and the width L4 of the battery module 1, and also avoids the problem of interference with the installation of the first liquid cooling plate 3 caused by an excessively large ratio between the width L2 of the pole 111 and the width L4 of the battery module 1. Therefore, the battery module assembly 100 combines the advantages of excellent cooling performance with ease of installation.

[0068] In a third direction perpendicular to the first and second directions, the ratio of the length of the tab 2 to the length L1 of the terminal 111 is 0.1-5. This avoids both the problem of the tab 2 interfering with the installation caused by an excessively large ratio of the tab 2 to the length L1 of the terminal 111, and the problem of the tab 2 being too small, which would result in a small contact surface between the tab 2 and the terminal 111 and, in turn, poor electrical connection or heat exchange efficiency of the battery cell 11. Therefore, the battery module assembly 100 combines the advantages of excellent cooling performance with high installation convenience.

[0069] The ratio of the length of the tab 2 to the length L1 of the pole 111 is 1.5-5. In other words, the length of the tab 2 is greater than the length of the pole 111. Furthermore, the tab 2 includes a connected overlapping portion and an extended portion. The overlapping portion overlaps the two poles 111 of two adjacent battery cells 11, and the extended portion extends to the shoulder 112 of the battery cell 11.

[0070] In a third direction perpendicular to the first and second directions, the ratio of the length of the liquid cooling portion 31 to the length of the bar 2 is 0.1-2. This avoids the problem of a poor cooling effect caused by a ratio of the length of the liquid cooling portion 31 to the length of the bar 2 being too small. It also avoids the problem of a small contact area between the liquid cooling portion 31 and the bar 2 caused by a ratio of the length of the liquid cooling portion 31 to the length of the bar 2 being too large, thereby avoiding the advantage of wasting material in the liquid cooling portion 31. Furthermore, the ratio of the length of the liquid cooling portion 31 to the length of the bar 2 can be 1, so that the battery module assembly 100 achieves better cooling efficiency and cost.

[0071] As shown in Figures 1 to 6 , the battery module assembly 100 according to the embodiment of the present invention further includes a second liquid cooling plate 4, which is configured to be disposed on the battery module 1 and is disposed opposite the first liquid cooling plate 3. It will be appreciated that the second liquid cooling plate 4 and the first liquid cooling plate 3 are disposed opposite each other on either side of the battery module 1 in the vertical direction shown in Figure 1 .

[0072] The battery module assembly 100 of this embodiment of the present invention cools the other side of the battery module 1 by disposing a second liquid cooling plate 4 on the side of the battery module 1 opposite the first liquid cooling plate 3. This further improves the heat dissipation effect and uniformity of the battery module 1.

[0073] As shown in FIG12 and FIG13 , a first cooling channel 311 is provided in the first liquid cooling plate 3 , and a second cooling channel 41 is provided in the second liquid cooling plate 4 . Each of the first cooling channel 311 and the second cooling channel 41 has a cooling medium for cooling the battery module 1 .

[0074] The battery module assembly 100 of the present embodiment, by providing a first cooling channel 311 within the first liquid cooling plate 3 and a second cooling channel 41 within the second liquid cooling plate 4, controls the flow path of the cooling medium, thereby extending the time the cooling medium flows through the liquid cooling plates (first liquid cooling plate 3 and second liquid cooling plate 4), thereby improving the cooling effect of the liquid cooling plates. As a result, the battery module assembly 100 improves the heat dissipation effect of the battery module 1.

[0075] Optionally, the first liquid cooling plate 3 and the second liquid cooling plate 4 may be in the form of harmonica tubes or may be stamped and brazed.

[0076] Furthermore, as shown in Figures 1 to 4, the battery module assembly 100 of an embodiment of the present invention also includes a first convergence piece and a second convergence piece, and the first cooling channel 311 and the second cooling channel 41 both include multiple branch channels extending along the second direction. The first convergence piece is correspondingly arranged at both ends of the extension direction of the first liquid cooling plate 3, and the second convergence piece is correspondingly arranged at both ends of the extension direction of the second liquid cooling plate 4.

[0077] In the battery module assembly 100 of the embodiment of the present invention, the first cooling channel 311 and the second cooling channel 41 each include multiple sub-channels extending along the second direction, thereby expanding the area covered by the cooling channel when flowing through the liquid cooling plate, thereby further improving the cooling effect of the liquid cooling plate on the battery module 1. Furthermore, the first and second conduits are provided to converge the cooling medium in the sub-channels, eliminating the need for connecting pipes to each sub-channel, thereby improving the convenience of connection and layout.

[0078] As shown in FIG1 to FIG4 , the battery module assembly 100 of the embodiment of the present invention further includes a liquid inlet pipe 51 and a liquid outlet pipe 52 . The liquid inlet pipe 51 , the first liquid cooling plate 3 , the liquid outlet pipe 52 and the second liquid cooling plate 4 are connected in sequence.

[0079] The battery module assembly 100 of the embodiment of the present invention connects the first liquid cooling plate 3 and the second liquid cooling plate 4 through the provided liquid inlet pipe 51 and liquid outlet pipe 52 to realize the circulation of the internal cooling medium, thereby improving the cooling uniformity and control convenience of the battery module 1.

[0080] Optionally, there may be multiple first liquid cooling plates 3, and the first liquid cooling plates 3 may be connected in parallel or in series before being connected to the second liquid cooling plate 4. Furthermore, the second liquid cooling plate 4 may be a plate structure having a liquid cavity, and the plate structure has a liquid outlet and a liquid inlet. The battery module 1 may have multiple rows of battery cells arranged in rows, each battery cell row may have two shoulders 112, and each shoulder 112 is correspondingly provided with a first liquid cooling plate 3. Multiple first liquid cooling plates 3 may be connected in series or in parallel to form a whole and then be connected to the second liquid cooling plate 4.

[0081] As shown in Figure 12, the second liquid cooling plate 4 has a heat exchange panel 42 and a flow channel panel 43 arranged opposite each other along the second direction. The heat exchange panel 42 and the flow channel panel 43 form a second cooling channel 41. The area of ​​the heat exchange panel 42 in contact with the battery module 1 is S1, and the area of ​​the battery module 1 connecting to the heat exchange panel 42 is S2. The ratio of S1 to S2 is 0.1-1. This avoids the problem of poor cooling effect caused by the small heat exchange area of ​​the second liquid cooling plate 4, while also preventing the problem of the heat exchange panel 42 being too large and occupying the internal space of the battery pack 1000.

[0082] As shown in Figure 12, in the second direction, the thickness of the heat exchange panel 42 is D1, the dimension of the second cooling channel 41 is H1, and 0.02≤D1 / H1≤5; the thickness of the channel panel 43 is D2, and the dimension of the second cooling channel 41 is H1, and 0.02≤D2 / H1≤5. Thus, the battery module assembly 100 avoids the problem of poor cooling effect caused by excessive thickness of the heat exchange panel 42 and / or channel panel 43 occupying space in the second cooling channel 41, while also avoiding the problem of weak structural strength caused by excessive thickness of the heat exchange panel 42 and / or channel panel 43. Therefore, the battery module assembly 100 combines the advantages of good cooling effect and high structural strength.

[0083] Optionally, the heat exchange panel 42 can be a flat plate, and the flow channel panel 43 can be a corrugated structure plate. The heat exchange panel 42 and the flow channel panel 43 can be formed into the second liquid cooling plate 4 by stamping, brazing, and inflation manufacturing. The second liquid cooling plate 4 can also be a harmonica tube or aluminum profile tube.

[0084] Optionally, in order to ensure the connection strength between the second liquid cooling plate 4 and the battery module 1 and further improve the cooling effect between the second liquid cooling plate 4 and the battery module 1, the heat conduction between the second liquid cooling plate 4 and the battery module 1 can be increased by various heat exchange media such as thermal pads, thermal adhesives, structural adhesives, double-sided tape, etc.

[0085] In the second direction, the thickness of the side of the first liquid cooling plate 3 connected to the bar 2 (heat dissipation surface 312) is D3, and the dimension of the first cooling channel 311 is H2, where 0.02≤D3 / H2≤2. Thus, the battery module assembly 100 avoids both the problem of poor cooling effect caused by an excessively thick first liquid cooling plate 3 occupying space in the second cooling channel 41, and the problem of weak structural strength caused by an excessively thin first liquid cooling plate 3. Therefore, the battery module assembly 100 combines the advantages of good cooling effect and high structural strength.

[0086] The battery pack 1000 of the embodiment of the present invention includes a heat-conducting layer disposed between the first liquid cooling plate 3 and the bar 2. Thus, the battery pack 1000 can further improve the heat transfer efficiency between the bar 2 and the first liquid cooling plate 3.

[0087] Furthermore, the thermal conductive layer may be a thermal conductive pad, thermal conductive adhesive, structural adhesive or double-sided adhesive.

[0088] The battery pack 1000 according to the embodiment of the present invention may include a housing 200 and a battery module assembly 100 according to any one of the above items disposed in the housing 200 .

[0089] Therefore, the battery pack 1000 of the embodiment of the present invention has the advantages of good fast charging capability and improved heat dissipation capability.

[0090] A vehicle according to an embodiment of the present invention includes a battery pack 1000 according to any one of the above items.

[0091] Therefore, the vehicle according to the embodiment of the present invention has the advantages of good fast charging capability and improved heat dissipation capability.

[0092] In the description of the present invention, it should be understood 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 to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0093] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0094] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0095] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0096] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean 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 present invention. In this specification, the schematic expressions of the above terms do 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. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0097] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery module assembly, comprising: A battery module, the battery module including a plurality of battery cells arranged in a first direction; Bars, there are a plurality of the bars, each of the bars being connected to the pole posts of two adjacent battery cells to form a bar row; A first liquid cooling plate, the first liquid cooling plate extending along the first direction, and the first liquid cooling plate being attached to the bar row along a second direction perpendicular to the first direction.

2. The battery module assembly according to claim 1, the first liquid cooling plate includes a connected liquid cooling portion and a lapping edge, the liquid cooling portion being attached to the bar row, and the lapping edge being attached to the shoulders of the battery cells; And / or, the bars are welded, screwed, riveted or adhesively bonded with conductive adhesive to the pole posts of the battery module.

3. The battery module assembly according to claim 2, in a third direction perpendicular to the first direction and the second direction, the ratio between the length L1 of the pole post and the length L3 of the battery module is 0.1 - 0.4; And / or, in the first direction, the ratio between the width L2 of the pole post and the width L4 of the battery module is 0.1 - 0.99; And / or, in a third direction perpendicular to the first direction and the second direction, the ratio between the length of the bar and the length L1 of the pole post is 0.1 - 5; And / or, in a third direction perpendicular to the first direction and the second direction, the ratio between the length L5 of the liquid cooling portion and the length L6 of the bar is 0.1 - 2.

4. The battery module assembly according to any one of claims 1 to 3, further comprising a second liquid cooling plate, the second liquid cooling plate being configured to be disposed on the battery module, and the second liquid cooling plate being disposed opposite to the first liquid cooling plate.

5. The battery module assembly according to claim 4, a first cooling flow channel is provided in the first liquid cooling plate, a second cooling flow channel is provided in the second liquid cooling plate, and each of the first cooling flow channel and the second cooling flow channel has a cooling medium for cooling the battery module.

6. The battery module assembly according to claim 4 or 5, further comprising an inlet pipe and an outlet pipe, the inlet pipe, the first liquid cooling plate, the outlet pipe and the second liquid cooling plate are sequentially communicated.

7. The battery module assembly according to claim 5 or 6, the second liquid cooling plate has a heat exchange panel and a flow channel panel disposed opposite to each other along the second direction, the heat exchange panel and the flow channel panel form the second cooling flow channel, the area of the heat exchange panel in contact with the battery module is S1, the area of the side of the battery module connected to the heat exchange panel is S2, and the ratio of S1 to S2 is 0.1 - 1; And / or, in the second direction, the thickness of the heat exchange panel is D1, the size of the second cooling flow channel is H1, 0.02 ≤ D1 / H1 ≤ 5; the thickness of the flow channel panel is D2, the size of the second cooling flow channel is H1, 0.02 ≤ D2 / H1 ≤ 5; And / or, in the second direction, the thickness of the side of the first liquid cooling plate connected to the bar piece is D3, the size of the second cooling flow channel is H2, and 0.02 ≤ D3 / H2 ≤ 2.

8. The battery module assembly according to any one of claims 1 to 7 further includes a heat conduction layer between the first liquid cooling plate and the bar piece.

9. A battery pack includes a housing and the battery module assembly according to any one of claims 1 to 8 provided in the housing.

10. A vehicle includes the battery pack according to claim 9.

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