Battery module assembly, battery pack and vehicle

Abstract

The embodiment of the invention provides a battery module assembly, a battery pack and a vehicle. The battery module assembly comprises a battery module, a bar and a first liquid cooling plate. The battery module comprises a plurality of battery cells arranged along a first direction, the number of the bar sheets is multiple, and each bar sheet is connected to the pole columns of two adjacent battery cells to form a bar sheet row; the first liquid cooling plate extends along the first direction, and the first liquid cooling plate is attached to the bar row along a second direction perpendicular to the first direction. Therefore, the battery module assembly provided by the embodiment of the invention has the advantage of improving the quick charging capability and the heat dissipation capability at the pole.

Description

[0001] This application claims the priority of the Chinese patent application filed with the China Patent Office on December 7, 2023, with application number 202311677004.9 and application name “Battery module assembly, battery pack and vehicle”, all contents of which are incorporated by reference in the application. Technical Field

[0002] The present invention relates to the technical field of batteries, and in particular to a battery module assembly and a battery pack and a vehicle having the battery module assembly. Background Art

[0003] 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 higher the risk of thermal runaway. This is especially true for high-power fast-charging power batteries. At present, 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 the related technology, power batteries currently still use a liquid cooling plate at the bottom or side to control the temperature of fast-charging batteries, but this method has limited heat dissipation effect on the top of the battery cell, which in turn causes the problem of poor fast-charging capability of the battery module. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a battery module assembly. The battery module assembly has the advantage of improving the heat dissipation capacity at the pole.

[0005] An embodiment of the present invention further provides a battery pack.

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

[0007] The battery module includes a plurality of battery cells arranged along a first direction, and the plurality of bar sheets are provided, each of the bar sheets being connected to poles of two adjacent battery cells to form a bar sheet row; the first liquid cooling plate extends along the first direction, and the first liquid cooling plate is attached to the bar sheet row along a second direction perpendicular to the first direction.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] In some embodiments, the tab is welded, screwed, riveted or bonded to the pole of the battery module with conductive adhesive.

[0012] In some embodiments, in a third direction perpendicular to the first direction and the second direction, a ratio between a length L1 of the pole and a length L3 of the battery module is 0.1-0.4.

[0013] In some embodiments, in the first direction, a ratio between a width L2 of the pole and a width L4 of the battery module is 0.1-0.99.

[0014] In some embodiments, in a third direction perpendicular to the first direction and the second direction, a ratio of the length of the bar to the length L1 of the pole is 0.1-5.

[0015] 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.

[0016] In some embodiments, the battery module assembly further includes a second liquid cooling plate, which is used to be disposed on the battery module, and the second liquid cooling plate is disposed opposite to the first liquid cooling plate.

[0017] In some embodiments, a first cooling channel is disposed in the first liquid cooling plate, a second cooling channel is disposed 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.

[0018] 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.

[0019] 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 fitting area of ​​the battery module are 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.

[0020] 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;

[0021] In some embodiments, in the second direction, the thickness of one side of the first liquid cooling plate connected to the bar sheet is D3, the size of the second cooling channel is H2, and 0.02≤D3 / H2≤2.

[0022] In some embodiments, the battery module assembly further includes a heat conductive layer between the first liquid cooling plate and the bar sheet.

[0023] 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 in the housing.

[0024] The vehicle according to the embodiment of the present invention includes the battery pack described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional diagram of a battery pack according to an embodiment of the present invention.

[0026] Figure 2 It is a three-dimensional diagram of the cooperation between the first liquid cooling plate and the second liquid cooling plate according to an embodiment of the present invention.

[0027] Figure 3 is a three-dimensional diagram of a first liquid cooling plate according to an embodiment of the present invention.

[0028] Figure 4 is a three-dimensional diagram of a second liquid cooling plate according to an embodiment of the present invention.

[0029] Figure 5 It is a front view of a battery module assembly according to an embodiment of the present invention.

[0030] Figure 6 It is a three-dimensional diagram of a battery module assembly according to an embodiment of the present invention.

[0031] Figure 7 It is a front view of a battery module assembly according to another embodiment of the present invention.

[0032] Figure 8 It is a three-dimensional diagram of a battery module assembly according to another embodiment of the present invention.

[0033] Fig. 9 It is a three-dimensional diagram of a battery module according to an embodiment of the present invention.

[0034] Fig.10 It is a three-dimensional diagram of the battery module and the battery plate according to an embodiment of the present invention.

[0035] Fig.11 is a three-dimensional diagram of another battery module according to an embodiment of the present invention.

[0036] Fig.12 is a cross-sectional view of a second liquid cooling plate according to an embodiment of the present invention.

[0037] Fig.13 is a cross-sectional view of a first liquid cooling plate according to an embodiment of the present invention.

[0038] Fig.14 4 is a three-dimensional diagram of a battery cell according to an embodiment of the present invention.

[0039] Reference numerals:

[0040] Battery pack 1000;

[0041] Battery module assembly 100; housing 200;

[0042] Battery module 1; battery cell 11; pole 111; shoulder 112;

[0043] Ba Pian 2;

[0044] First liquid cooling plate 3; liquid cooling portion 31; first cooling channel 311; heat dissipation surface 312;

[0045] overlapping edge 32;

[0046] Second liquid cooling plate 4; second cooling channel 41; heat exchange panel 42; channel panel 43;

[0047] Liquid inlet pipe 51; Liquid outlet pipe 52. DETAILED DESCRIPTION

[0048] 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.

[0049] Reference below Figure 1-Figure 13 A battery module assembly 100 , a battery pack 1000 , and a vehicle according to an embodiment of the present invention are described.

[0050] The battery module assembly 100 of the embodiment of the present invention includes a battery module 1 , a bar 2 and a first liquid cooling plate 3 .

[0051] The battery module 1 includes a plurality of Figure 1 The battery cells 11 are arranged in the left and right directions (as shown in the figure), the bar sheets 2 have a plurality of bar sheets, each bar sheet 2 is connected to the poles 111 of two adjacent battery cells 11 to form a bar sheet row; the first liquid cooling plate 3 extends along the first direction, and the first liquid cooling plate 3 extends along the second direction perpendicular to the first direction (for example, Figure 1The up and down directions shown in FIG) are attached to the bar sheet row.

[0052] 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 through the first liquid cooling plate 3 in a timely and rapid manner, 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 use of the battery module 1.

[0053] 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 capacity at the pole 111.

[0054] Specifically, the bar 2 can connect two adjacent cells 11 in the battery module 1 in series and / or in parallel. The pole 111 is arranged on the top of the cell 11, the bar 2 is connected to the pole 111, and the first liquid cooling plate 3 is arranged on the upper surface of the bar 2.

[0055] like Figures 7 and 8 As shown, the first liquid cooling plate 3 includes a connected liquid cooling portion 31 and an overlapping edge 32 , the liquid cooling portion 31 is attached to the bar sheet row, and the overlapping edge 32 is attached to the shoulder 112 of the battery cell 11 .

[0056] 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 overlapped edge 32, wherein the liquid cooling portion 31 is attached to the bar sheet row, and the overlapped edge 32 is attached to the shoulder 112 of the battery cell 11. The overlapped 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, which 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 overlapped edge 32 has the function of evenly dissipating heat), 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.

[0057] 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 electrode column and the negative electrode column of the battery cell 11 are both arranged on the top surface of the battery cell 11, and the positive electrode column and the negative electrode column are arranged near the middle of the battery cell 11, the shoulder 112 can be formed on the battery cell 11 along the third direction (for example, Figure 1 ) on both sides of the front-to-back direction as shown in Fig.11As shown. The positive pole and the negative pole are arranged near the edge of the battery cell 11, and the shoulder 112 is formed between the explosion-proof valve of the battery cell 11 and the positive pole, and between the explosion-proof valve of the battery cell 11 and the negative pole. When the positive pole and the negative pole of the battery cell 11 are relatively arranged at the top and bottom of the battery cell 11. For example, the positive pole is arranged in the middle area of ​​the top surface of the battery cell 11, and the shoulder 112 can be formed on both sides of the positive pole of the battery cell 11 along the third direction, for example, a blade battery cell 11.

[0058] The tab 2 can be welded, screwed, riveted or bonded with conductive adhesive to the pole 111 of the battery module 1. Therefore, the battery module assembly 100 of the embodiment of the present invention has the advantage of high connection convenience. For example, the tab 2 connecting the battery cells can be connected to the pole 111 of the battery cell 11 by riveting or laser welding, thereby realizing high-voltage series or parallel connection of the entire battery module 1.

[0059] Optionally, the bar piece 2 may be a copper alloy bar piece 2 or an aluminum alloy bar piece 2, and an observation hole is provided on the bar piece 2. Furthermore, the bar piece 2 may be formed by stamping, machining or casting.

[0060] 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.

[0061] Optionally, the pole can be square or circular. The pole generally includes a positive pole and a negative pole, and the positive pole and the negative pole can be arranged on the same side of the battery module 1 or opposite to each other.

[0062] In a third direction perpendicular to the first direction and the second direction (eg, Figure 1 The front-to-back direction shown in Figure 6 In the third direction shown in the figure, the ratio between the length L1 of the pole 111 and the length L3 of the battery module 1 is 0.1-0.4. In this way, it is avoided that the ratio is too large (exceeding 0.40), the top surface of the battery cell 11 does not have enough area to accommodate the necessary electrical safety distance between the positive pole and the negative pole of the battery cell 11, and there is a problem of poor safety; and it is avoided that the ratio is too small, which will cause the top surface of the battery cell 11 to be in contact with the first liquid cooling plate 3. The area accounts for a small proportion, and then leads to the problem of poor heat exchange efficiency at the top of the battery cell 11. Therefore, the battery module assembly 100 has the advantages of good cooling effect and high structural strength.

[0063] 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 2 or more positive electrode columns + 2 or more negative electrode columns.

[0064] In the first direction, Fig.14As shown, the ratio between the width L2 of the pole 111 and the width L4 of the battery module 1 is 0.1-0.99. Thus, the problem of poor cooling effect caused by the ratio between the width L2 of the pole 111 and the width L4 of the battery module 1 being too small is avoided, and the problem of installation interference of the first liquid cooling plate 3 caused by the ratio between the width L2 of the pole 111 and the width L4 of the battery module 1 being too large is avoided. Therefore, the battery module assembly 100 has the advantages of good cooling effect and high installation convenience.

[0065] In the third direction perpendicular to the first direction and the second direction, the ratio of the length of the bar piece 2 to the length L1 of the pole 111 is 0.1-5. Thus, it is possible to avoid the problem of the bar piece 2 interfering with the installation when the ratio of the length of the bar piece 2 to the length L1 of the pole 111 is too large, and to avoid the problem of the bar piece 2 interfering with the installation when the ratio is too small, which will result in a small proportion of the contact surface between the bar piece 2 and the pole 111, and thus lead to poor electrical connection or heat exchange efficiency of the battery cell 11. Therefore, the battery module assembly 100 has the advantages of good cooling effect and high installation convenience.

[0066] The ratio of the length of the bar 2 to the length L1 of the pole 111 is 1.5-5. That is, the length of the bar 2 is greater than the length of the pole 111. Further, the bar 2 includes a connected overlap portion and an extension portion, the overlap portion overlaps the two poles 111 of two adjacent battery cells 11, and the extension portion extends to the shoulder 112 of the battery cell 11.

[0067] In the third direction perpendicular to the first direction and the second direction, the ratio of the length of the liquid cooling part 31 to the length of the bar piece 2 is 0.1-2. In this way, the problem of poor cooling effect caused by the ratio of the length of the liquid cooling part 31 to the length of the bar piece 2 being too small is avoided. It also avoids the advantage of the length of the liquid cooling part 31 being too large to the length of the bar piece 2, resulting in a small contact area between the liquid cooling part 31 and the bar piece 2, thereby avoiding material waste at the liquid cooling part 31. Furthermore, the ratio of the length of the liquid cooling part 31 to the length of the bar piece 2 can be 1, so that the battery module assembly 100 achieves better results in both cooling efficiency and cost.

[0068] like Figures 1 to 6 As shown, the battery module assembly 100 of the embodiment of the present invention further includes a second liquid cooling plate 4, which is used to be arranged on the battery module 1, and the second liquid cooling plate 4 is arranged opposite to the first liquid cooling plate 3. It can be understood that the second liquid cooling plate 4 and the first liquid cooling plate 3 are arranged along Figure 1 The up and down directions shown in are relatively arranged on both sides of the battery module 1 .

[0069] The battery module assembly 100 of the embodiment of the present invention can cool the other side of the battery module 1 by disposing the second liquid cooling plate 4 on the side of the battery module 1 opposite to the first liquid cooling plate 3. Therefore, the battery module assembly 100 further improves the heat dissipation effect and uniformity of the battery module 1.

[0070] like Fig.12 and Fig.13 As shown, 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 .

[0071] The battery module assembly 100 of the embodiment of the present invention controls the flow path of the cooling medium by providing a first cooling channel 311 in the first liquid cooling plate 3 and a second cooling channel 41 in the second liquid cooling plate 4, thereby extending the time for the cooling medium to flow in the liquid cooling plates (the first liquid cooling plate 3 and the second liquid cooling plate 4) and 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.

[0072] 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.

[0073] Furthermore, if Figures 1 to 4 As shown, the battery module assembly 100 of the embodiment of the present invention also includes a first collector and a second collector, the first cooling channel 311 and the second cooling channel 41 both include a plurality of branch channels extending along the second direction, the first collector is correspondingly arranged at both ends of the extension direction of the first liquid cooling plate 3, and the second collector is correspondingly arranged at both ends of the extension direction of the second liquid cooling plate 4.

[0074] The battery module assembly 100 of the embodiment of the present invention includes a plurality of sub-channels extending along the second direction through the first cooling channel 311 and the second cooling channel 41, thereby expanding the area covered by the cooling channel when flowing in the liquid cooling plate, thereby better improving the cooling effect of the liquid cooling plate on the battery module 1. The cooling medium in the sub-channels can be converged by the first and second converging pieces, and there is no need to set a connecting pipe for each sub-channel, thereby improving the convenience of connection and layout.

[0075] like Figures 1 to 4 As shown, 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, and 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.

[0076] 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 the 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.

[0077] 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 and then 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 of which 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 connected to the second liquid cooling plate 4.

[0078] like Fig.12 As shown, the second liquid cold plate 4 has a heat exchange panel 42 and a flow channel panel 43 arranged opposite to each other along the second direction, and the heat exchange panel 42 and the flow channel panel 43 form a second cooling flow channel 41, and the area of ​​the heat exchange panel 42 and the bonding area of ​​the battery module 1 are S1, and the area of ​​the battery module 1 and the heat exchange panel 42 are connected to the side area S2, and the ratio of S1 to S2 is 0.1-1. In this way, the problem of poor cooling effect caused by the small heat exchange area of ​​the second liquid cold plate 4 can be avoided, and the problem of the heat exchange panel 42 being too large to occupy the internal space of the battery pack 1000 can be avoided.

[0079] like Fig.12 As shown, in the second direction, the thickness of the heat exchange panel 42 is D1, the size of the second cooling channel 41 is H1, 0.02≤D1 / H1≤5; the thickness of the channel panel 43 is D2, the size of the second cooling channel 41 is H1, 0.02≤D2 / H1≤5. As a result, the battery module assembly 100 avoids the problem of poor cooling effect caused by the excessive thickness of the heat exchange panel 42 and / or the channel panel 43 occupying the space of the second cooling channel 41, and avoids the problem of weak structural strength caused by the excessive thickness of the heat exchange panel 42 and / or the channel panel 43. Therefore, the battery module assembly 100 has the advantages of good cooling effect and high structural strength.

[0080] Optionally, the heat exchange panel 42 may be a flat panel, and the flow channel panel 43 may be a corrugated structured panel. The heat exchange panel 42 and the flow channel panel 43 may be formed into the second liquid cooling plate 4 by stamping, brazing, and inflation manufacturing, and the second liquid cooling plate 4 may also be a harmonica tube or an aluminum profile tube.

[0081] 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, various heat exchange media such as thermal pads, thermal conductive adhesives, structural adhesives, double-sided adhesives, etc. can be used between the second liquid cooling plate 4 and the battery module 1 to increase heat conduction.

[0082] In the second direction, the thickness of the side (heat dissipation surface 312) where the first liquid cooling plate 3 is connected to the bar sheet 2 is D3, and the size of the first cooling channel 311 is H2, 0.02≤D3 / H2≤2. Thus, the battery module assembly 100 avoids the problem of poor cooling effect caused by the excessive thickness of the first liquid cooling plate 3 occupying the space of the second cooling channel 41, and also avoids the problem of weak structural strength caused by the excessive thickness of the first liquid cooling plate 3. Therefore, the battery module assembly 100 has the advantages of good cooling effect and high structural strength.

[0083] The battery pack 1000 of the embodiment of the present invention includes a heat-conducting layer, which is disposed between the first liquid cooling plate 3 and the bar sheet 2. Therefore, the battery pack 1000 can further improve the heat transfer efficiency between the bar sheet 2 and the first liquid cooling plate 3.

[0084] Furthermore, the thermally conductive layer may be a thermally conductive pad, thermally conductive adhesive, structural adhesive or double-sided adhesive.

[0085] The battery pack 1000 of 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 .

[0086] 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.

[0087] The vehicle according to the embodiment of the present invention includes a battery pack 1000 according to any one of the above items.

[0088] Therefore, the vehicle according to the embodiment of the present invention has the advantages of good fast charging capability and improved heat dissipation capability.

[0089] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0090] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0091] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0092] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0093] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0094] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A battery module assembly, characterized in that: include: A battery module, the battery module comprising a plurality of battery cells arranged along a first direction; A plurality of bar plates, each of which is connected to the poles of two adjacent battery cells to form a bar plate row; A first liquid cooling plate extends along the first direction and is attached to the bar row along a second direction perpendicular to the first direction.

2. The battery module assembly according to claim 1, characterized in that: The first liquid cooling plate comprises a connected liquid cooling portion and an overlapped edge, the liquid cooling portion is attached to the bar sheet row, and the overlapped edge is attached to the shoulder of the battery cell; And / or, the tab is welded, screwed, riveted or bonded to the pole of the battery module by conductive adhesive.

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

4. The battery module assembly according to claim 1, characterized in that: It also includes a second liquid cooling plate, which is used to be arranged on the battery module, and the second liquid cooling plate is arranged opposite to the first liquid cooling plate.

5. The battery module assembly according to claim 4, characterized in that: A first cooling channel is disposed in the first liquid cooling plate, and a second cooling channel is disposed in the second liquid cooling plate. Each of the first cooling channel and the second cooling channel has a cooling medium for cooling the battery module.

6. The battery module assembly according to claim 5, characterized in that: It also 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.

7. The battery module assembly according to claim 5, characterized in that: 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 bonding area of ​​the battery module are 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; And / or, 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; And / or, in the second direction, the thickness of one side of the first liquid cooling plate connected to the bar sheet is D3, the size of the second cooling channel is H2, and 0.02≤D3 / H2≤2.

8. The battery module assembly according to claim 1, characterized in that: A heat-conducting layer is also included between the first liquid cooling plate and the bar.

9. A battery pack, characterized in that: The invention comprises a shell and a battery module assembly according to any one of claims 1 to 8 arranged in the shell.

10. A vehicle, characterized in that: Comprising a battery pack according to claim 9.

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