Battery module assembly, battery pack and vehicle

Abstract

The utility model relates to a battery module assembly, a battery pack and a vehicle. The battery module assembly comprises a battery module, a busbar and a liquid cooling plate, the battery module comprises a plurality of battery cells arranged in the first direction, the busbar is connected to pole columns of the battery cells of the battery module, the liquid cooling plate extends in the first direction, and the liquid cooling plate is attached to the busbar in the second direction perpendicular to the first direction; the liquid cooling plate is provided with flat plate sections and arched sections, the plurality of flat plate sections are arranged along the first direction, the flat plate sections are connected with the busbar, the arched sections are arranged between the adjacent flat plate sections, and the arched sections are arched in the second direction. According to the battery module assembly disclosed by the utility model, the maximum value of stress between the liquid cooling plate and the pole column is reduced, and the constraining force of the liquid cooling plate on the pole column is reduced, so that the problem of structural failure and damage of the pole column of the battery cell is avoided, the service life of the battery module assembly is prolonged, and the use safety of the battery module assembly is improved.

Description

Technical Field

[0001] The utility model 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

[0002] High-rate fast charging means a huge fast charging current, which will cause the Joule heat generated by the over-current mechanical parts in the battery cell, the bus bar in the battery pack and other over-current components to increase exponentially. One important way to increase the speed of energy replenishment is high-rate fast charging. In the traditional cooling scheme, the liquid cooling plate and the over-current components are separated by the battery cell. The thermal resistance of the battery cell body is high, resulting in insufficient heat exchange efficiency. The heat generated by the over-current components cannot be taken away in time, and then transferred to the battery cell winding, causing rapid temperature rise, causing over-temperature limit current, and also increasing the risk of high-temperature thermal runaway. In the related art, the cooling efficiency is improved by directly cooling the battery cell pole or bus bar through a liquid cooling plate. However, the liquid cooling plate is a flat structure. When the liquid cooling plate is directly connected to the bus bar, it is easy to cause the distance between the poles to increase after the battery cell expands, causing the liquid cooling plate to exert stress on the poles, resulting in damage to the battery cell poles. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art to at least a certain extent. To this end, an embodiment of the utility model proposes a battery module assembly. The battery module assembly reduces the maximum stress between the liquid cooling plate and the pole, reduces the constraint force of the liquid cooling plate on the pole, thereby avoiding the problem of structural failure and damage of the pole of the battery cell, thereby improving the life of the battery module assembly and the safety of use.

[0004] An embodiment of the present invention further provides a battery pack.

[0005] An embodiment of the utility model further provides a vehicle.

[0006] According to an embodiment of the utility model, a battery module assembly includes a battery module, a bus and a liquid cooling plate, wherein the battery module includes a plurality of battery cells arranged along a first direction; the bus is connected to the poles of the battery cells of the battery module; the liquid cooling plate extends along the first direction, and the liquid cooling plate is attached to the bus along a second direction perpendicular to the first direction, the liquid cooling plate has a flat section and a arched section, a plurality of the flat sections are arranged along the first direction, the flat sections are connected to the bus, the arched sections are provided between adjacent flat sections, and the arched sections are arched in the second direction.

[0007] The battery module assembly of the embodiment of the utility model reduces the maximum value of the stress between the liquid cooling plate and the pole, reduces the constraint force of the liquid cooling plate on the pole, thereby avoiding the problem of structural failure and damage of the pole of the battery cell, and further improves the life of the battery module assembly and the safety of use.

[0008] In some embodiments, the arched section is arched, and the radius of curvature of the arched section is 5mm-50mm; and / or, the liquid cooling plate includes a plate body and ribs arranged inside the plate body, the thickness of the plate body is 0.35mm-2mm, and the thickness of the ribs is 0.1mm-1mm; and / or, the liquid cooling plate includes a plate body and an insulating layer arranged on the surface of the plate body, and the thickness of the insulating layer is greater than or equal to 0.3mm.

[0009] In some embodiments, two adjacent battery cells have a spacing area in the first direction, and the orthographic projection of the arched segment in the second direction covers the spacing area.

[0010] In some embodiments, the battery module assembly further includes a limit bar, and the limit bar is attached between the bus and the liquid cooling plate.

[0011] In some embodiments, a heat conductor is further included, and the heat conductor is attached between the bus and the liquid cooling plate.

[0012] In some embodiments, the bus includes a plurality of first bars, the first bars include a first conductive body, a bending section, and a second conductive body sequentially connected along the first direction, the first conductive body is electrically connected to the pole of one of the two adjacent battery cells, the second conductive body is electrically connected to the pole of the other of the two adjacent battery cells, and the bending section is bent in the second direction toward a direction close to the battery cell.

[0013] In some embodiments, the battery module assembly also includes a first current collecting member and a second current collecting member, the first current collecting member and the second current collecting member are correspondingly arranged at the two ends of the liquid cooling plate in the first direction, the first current collecting member and the second current collecting member both include a current collector, the current collector is arranged at the two ends of the liquid cooling plate in the first direction, an insertion groove is arranged on the current collector, the liquid cooling plate is inserted into the insertion groove, and at least one of the first current collecting member and the second current collecting member also includes a water nozzle, and the water nozzle is arranged on the corresponding current collector.

[0014] In some embodiments, the busbar also includes a second bar piece, the second bar piece having a third conductive body and a connecting end, the third conductive body is connected to the outermost pole of the battery cell located in the battery module in the first direction, the connecting end extends out of the battery module along the first direction, and the connecting end has a gap with the corresponding water nozzle in the first direction.

[0015] The battery pack of the embodiment of the utility model comprises a housing and a battery module assembly as described in any one of the above embodiments, and the battery module assembly is arranged in the housing.

[0016] The vehicle of the embodiment of the utility model includes the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is one of the structural schematic diagrams of a battery module assembly according to one embodiment of the utility model;

[0018] Figure 2 It is a schematic structural diagram of a battery module, a bus bar, a limit bar and a heat conducting member in one embodiment of the utility model;

[0019] Figure 3 This is the second structural schematic diagram of a battery module assembly according to an embodiment of the utility model;

[0020] Figure 4 It is a structural schematic diagram of a first current collecting member of an embodiment of the utility model.

[0021] Reference numerals:

[0022] Battery module assembly 100;

[0023] Battery module 1, battery cell 11;

[0024] Busbar 2, first bar piece 21, first conductive body 211, second conductive body 212, bending section 213, second bar piece 22, third conductive body 221, connecting end 222;

[0025] Liquid cooling plate 3, flat plate section 31, arched section 32;

[0026] The first current collecting part 4, the current collector 41, the insertion groove 411, the plug 412, the water nozzle 42;

[0027] The second current collecting member 5 , the limiting strip 6 , and the heat conducting member 7 . DETAILED DESCRIPTION

[0028] 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 cannot be understood as limiting the present invention.

[0029] Reference below Figure 1-Figure 4 , describing a battery module assembly 100, a battery pack and a vehicle according to an embodiment of the present utility model.

[0030] The battery module assembly 100 of the embodiment of the present invention includes a battery module 1 , a bus bar 2 and a liquid cooling plate 3 .

[0031] The battery module 1 includes a first direction (eg Figures 1 to 3The plurality of battery cells 11 are arranged in a front-to-back direction (as shown in FIG. 1 ). The busbar 2 is connected to the poles of the battery cells 11 of the battery module 1. The liquid cooling plate 3 extends along a first direction, and the liquid cooling plate 3 extends along a second direction (e.g. Figure 1 The liquid cooling plate 3 is attached to the bus 2 in the upper and lower directions shown in the figure. The liquid cooling plate 3 has a flat section 31 and a raised section 32. A plurality of flat sections 31 are arranged along the first direction. The flat sections 31 are connected to the bus 2. There are raised sections 32 between adjacent flat sections 31. The raised sections 32 are raised in the second direction.

[0032] The liquid cooling plate 3 of the battery module assembly 100 of the embodiment of the utility model is arranged on the bus 2, which directly cools the bus 2 and can achieve efficient cooling of the battery cell 11 under high-rate fast charging conditions. In addition, the liquid cooling plate 3 of the battery module assembly 100 of the embodiment of the utility model is provided with an arched section 32 between adjacent flat sections 31. When the arched section 32 is subjected to external force, the arched section 32 is deformed and straightened by the external force. The arched section 32 can absorb at least a part of the external force by deforming itself, so that when the battery cell 11 expands and bulges, resulting in a tendency for the poles of adjacent battery cells 11 to separate, correspondingly, when the stress between the pole and the liquid cooling plate 3 tends to increase along the first direction, the arched section 32 itself deforms and absorbs at least a part of the stress between the pole and the liquid cooling plate 3, thereby realizing the transfer and release of at least a part of the stress between the pole and the liquid cooling plate 3, so that when the battery cell 11 expands and bulges, the interaction force between the liquid cooling plate 3 and the pole is reduced, the maximum value of the stress between the liquid cooling plate 3 and the pole is reduced, and the constraint force of the liquid cooling plate 3 on the pole is reduced, thereby avoiding the problem of structural failure and damage of the pole of the battery cell 11, thereby improving the life of the battery module assembly 100 and the safety of use.

[0033] Therefore, the battery module assembly 100 of the embodiment of the utility model has the advantages of efficient cooling and the ability to avoid damage to the pole, thereby improving the safety of use.

[0034] See also Figure 1 and Figure 3 The arched section 32 is arched, and the arched structure is simple and easy to manufacture and form, which is beneficial to reducing the cost of the battery module assembly 100.

[0035] See also Figure 1 and Figure 3 , the arched section 32 arches upward, in other words, the arched section 32 arches in the second direction away from the battery cell 11. It can be understood that the arched section 32 of the embodiment of the utility model is not limited thereto. For example, in other embodiments, the arched section 32 arches in the second direction in a direction close to the battery cell 11, thereby saving space occupied by the liquid cooling plate 3 and the battery module assembly 100 in the second direction, which is conducive to miniaturization of the battery module assembly 100.

[0036] In some embodiments, the radius of curvature of the arched section 32 is 5mm-50mm. When the battery cell 11 expands and bulges, causing the distance between the poles of adjacent battery cells 11 to increase, the deformation of the arched section 32 is ensured to adapt to the change in the distance between the adjacent poles. The deformation of the arched section 32 can meet the pulling between the adjacent poles, thereby ensuring that the poles do not suffer structural failure or damage.

[0037] For example, the radius of curvature of the arched section 32 is 5 mm, 10 mm, 20 mm, 30 mm, 40 mm or 50 mm.

[0038] It can be understood that the arched section 32 of the embodiment of the present invention is not limited thereto. For example, in other embodiments, the arched section 32 is in a corrugated shape that arches in the second direction.

[0039] Furthermore, the liquid cooling plate 3 includes a plate body and ribs arranged inside the plate body, the thickness of the plate body is 0.35 mm-2 mm, and the thickness of the ribs is 0.1 mm-1 mm.

[0040] For example, the thickness of the plate is 0.35 mm, 1 mm or 2 mm, and the thickness of the rib is 0.1 mm, 0.5 mm or 1 mm.

[0041] like Figure 1 and Figure 3 As shown, two adjacent battery cells 11 have a spacing area in the first direction, and the orthographic projection of the arched section 32 in the second direction covers the spacing area. When two adjacent battery cells 11 expand and deform, causing the distance between the poles of the two battery cells 11 to change, the arched section 32 can be deformed in time to release the stress between the pole and the liquid cooling plate 3, thereby improving the timeliness of the arched section 32 absorbing and releasing stress through deformation, thereby further ensuring that the pole does not suffer structural failure and damage. In addition, there is a gap between two adjacent battery cells 11, which can provide a layout space for the arched section 32 of the non-flat section 31, thereby saving the space occupied by the liquid cooling plate 3 and the battery module assembly 100 in the second direction, which is conducive to the miniaturization of the battery module assembly 100.

[0042] Furthermore, the liquid cooling plate 3 also includes an insulating layer arranged on the surface of the plate body, and the thickness of the insulating layer is greater than or equal to 0.3 mm, thereby ensuring the insulation performance of the liquid cooling plate 3. After being in a high temperature environment of 1000°C for 10 minutes, the leakage current can still be satisfied to be no higher than 3 mA under a voltage of 1000V, thereby avoiding the risk of insulation between the liquid cooling plate 3 and the poles of the battery cell 11, which is beneficial to improving the safety of the use of the battery module assembly 100 of the embodiment of the utility model.

[0043] Specifically, the insulating layer is made of insulating powder, insulating paint or insulating film.

[0044] In some embodiments, see Figure 1 , Figure 3 and Figure 4 The battery module assembly 100 further includes a first current collector 4 and a second current collector 5. The first current collector 4 and the second current collector 5 are correspondingly arranged at both ends of the liquid cooling plate 3 in the first direction. The first current collector 4 and the second current collector 5 both include a current collector 41, which is arranged at both ends of the liquid cooling plate 3 in the first direction. An insertion groove 411 is arranged on the current collector 41, and the liquid cooling plate 3 is inserted into the insertion groove 411. At least one of the first current collector 4 and the second current collector 5 further includes a water nozzle 42, which is arranged on the corresponding current collector 41.

[0045] The first current collecting part 4 and the second current collecting part 5 are respectively located at the two ends of the liquid cooling plate 3 in the first direction. The first current collecting part 4 and the second current collecting part 5 are water inlets and outlets connecting the liquid cooling plate 3 and the external cooling liquid pipeline and / or the adjacent liquid cooling plate 3. The cooling liquid enters the liquid cooling plate 3 after passing through the first current collecting part 4 or the second current collecting part 5, and then flows out of the liquid cooling plate 3 after passing through the second current collecting part 5 or the first current collecting part 4.

[0046] The liquid cooling plate 3 is inserted into the insertion groove 411 to realize the connection between the collector 41 and the liquid cooling plate 3. The connection method between the collector 41 and the liquid cooling plate 3 is simple and easy to process and manufacture. In addition, the number of quick-connect connectors and pipelines designed in the related art for connecting the liquid cooling plate 3 and the external coolant pipeline is reduced, which is beneficial to reducing the cost of the battery module assembly 100 of the embodiment of the utility model and saving the space occupied by the battery module assembly 100.

[0047] Specifically, after the liquid cooling plate 3 is inserted into the insertion groove 411 , the mechanical connection between the liquid cooling plate 3 and the current collector 41 and the sealing between the liquid cooling plate 3 and the insertion groove 411 are achieved by brazing or laser welding.

[0048] See also Figure 4 The collector 41 is extruded in one piece along the left and right directions using a square-shaped profile, and the openings at the left and right ends of the square-shaped profile are welded and sealed using plugs 412. After the square-shaped profile is extruded, it is machined and inserted into the groove 411.

[0049] Specifically, the water nozzle 42 and the current collector 41 are connected by hinge or welding. However, the embodiments of the utility model are not limited thereto. For example, in other embodiments, the water nozzle 42 and the current collector 41 are machined in one piece, so that there is no need to reserve a welding support boss at the connection between the water nozzle 42 and the current collector 41, which is conducive to miniaturization of the current collector 41, and thus to miniaturization of the battery module assembly 100 of the embodiment of the utility model.

[0050] In some embodiments, for a liquid cooling plate 3, the first current collecting member 4 and the second current collecting member 5 at both ends thereof both include a current collector 41 and a water nozzle 42, and the two water nozzles 42 are respectively connected to the external cooling liquid pipeline to form a water inlet and outlet, then for multiple liquid cooling plates 3, parallel cooling liquid flow paths can be formed. It can be understood that the embodiments of the utility model are not limited to this. In some other embodiments, multiple liquid cooling plates 3 of multiple battery module assemblies 100 can adopt a partially series and partially parallel cooling liquid flow path. For example, the second current collecting member 5 does not include the water nozzle 42, and the second current collecting member 5 connects two adjacent liquid cooling plates 3 to form a series cooling liquid flow path, and the first current collecting member 4 includes the current collector 41 and the water nozzle 42, and the water nozzle 42 of the first current collecting member 4 is connected to the external cooling liquid pipeline.

[0051] like Figure 1 As shown, the first current collecting component 4 includes a water nozzle 42 and a current collector 41, the rear ends of two adjacent liquid cooling plates 3 on the two groups of battery module assemblies 100 are connected through the first current collecting component 4, the water nozzle 42 on the first current collecting component 4 is a water inlet, the front ends of the two liquid cooling plates 3 of each group of battery module assemblies 100 are connected through the second current collecting component 5, the rear ends of the two liquid cooling plates 3 opposite to each other on the two battery module assemblies 100 are both provided with a first current collecting component 4, the water nozzles 42 on the two first current collecting components 4 are water outlets, so that a parallel cooling liquid flow path with one water inlet and two water outlets is formed on the two groups of battery module assemblies 100. For a group of battery module assemblies 100, two liquid cooling plates 3 are connected in series, and for a group of battery cells 11 of the battery module assembly 100, there are two corresponding columns of liquid cooling plates 3, and the flow direction of the coolant is formed as follows: one column of coolant flows in and one column of coolant flows out, so that the average temperature of the coolant corresponding to the battery cells 11 at different positions in the first direction is equivalent, which improves the temperature uniformity to a certain extent.

[0052] For further information, see Figure 3 The upper edge of the arched section 32 is lower than the upper edge of the current collector 41 or is at the same height as the upper edge of the current collector 41, thereby not increasing the size and space occupied by the battery module assembly 100 in the second direction of the embodiment of the utility model.

[0053] See also Figure 2 and Figure 3The busbar 2 includes a plurality of first tabs 21. The first tab 21 includes a first conductive body 211, a bent section 213, and a second conductive body 212 which are sequentially connected along a first direction. The first conductive body 211 is electrically connected to the pole of one of the two adjacent cells 11, and the second conductive body 212 is electrically connected to the pole of the other of the two adjacent cells 11. The bent section 213 is bent in the second direction toward the direction close to the cell 11. The bent section 213 of the first tab 21 has a certain amount of deformation. When the cell 11 expands and bulges, resulting in a tendency for the poles of the adjacent cells 11 to separate, the bent section 213 deforms accordingly and tends to be straightened to adapt to the increase in the distance between the two poles, thereby avoiding an increase in stress between the first tab 21 and the corresponding two poles, thereby further avoiding the problem of structural failure and damage of the poles of the cell 11, and further improving the life and safety of the battery module assembly 100.

[0054] See also Figures 1 to 3 The busbar 2 of the embodiment of the utility model further includes a second bar 22, which has a third conductive body 221 and a connection end 222. The third conductive body 221 is connected to the pole of the outermost battery cell 11 of the battery module 1 in the first direction, and the connection end 222 extends out of the battery module 1 along the first direction. There is a gap between the connection end 222 and the corresponding water nozzle 42 in the first direction. In other words, the connection end 222 and the corresponding water nozzle 42 are not opposite to each other in the second direction (staggered with each other), thereby leaving space on the connection end 222 so that the connection end 222 can be threaded or welded to the external high-voltage connection copper busbar.

[0055] See also Figure 2 and Figure 3 The battery module assembly 100 of the embodiment of the utility model further includes a limit bar 6, which is attached between the bus bar 2 and the liquid cooling plate 3. The limit bar 6 can prevent the bus bar 2 from directly contacting the liquid cooling plate 3, and further prevent the liquid cooling plate 3 from directly contacting the pole of the battery cell 11 to cause insulation risks, further improving the safety of the battery module assembly 100 of the embodiment of the utility model.

[0056] Specifically, the limiting strip 6 is glued to the first bar piece 21 and the second bar piece 22 .

[0057] The limit strip 6 is made of PC (polycarbonate) material with a certain hardness, and the thickness of the limit strip 6 is 0.5mm-2mm. The material of the limit strip 6 is not limited thereto. For example, in some other embodiments, the limit strip 6 is made of hard PU (polyurethane), PET (polyethylene terephthalate), PE (polyethylene or polyethylene) or MPP (microporous foamed polypropylene) and other insulating materials.

[0058] See also Figure 2The bus 2 is provided with limiting bars 6 on both sides (left and right sides) in the width direction thereof. The limiting bars 6 extend along the first direction. The two limiting bars 6 make the connection between the bus 2 and the liquid cooling plate 3 more stable.

[0059] Optionally, the limiting strip 6 is attached to the bus 2 in an integral form, which can simplify the bonding process of the limiting strip 6 to the bus 2 and the liquid cooling plate 3 .

[0060] The limiting bars 6 of the embodiments of the utility model are not limited thereto. For example, in some other embodiments, the limiting bars 6 on the bus 2 have one or more extending along the first direction, for example, the limiting bars 6 have three, or the limiting bars 6 have multiple extending along the width direction of the bus.

[0061] For further information, see Figure 2 and Figure 3 The battery module assembly 100 of the embodiment of the utility model further includes a heat conductor 7, which is attached between the bus 2 and the liquid cooling plate 3, thereby improving the heat transfer efficiency between the bus 2 and the liquid cooling plate 3, and improving the cooling effect of the liquid cooling plate 3 on the bus 2 and the poles of the battery cell 11.

[0062] like Figure 2 As shown, the heat conducting element 7 is located between the two limiting strips 6 .

[0063] Optionally, the thermal conductivity of the heat conducting member 7 is in the range of 0.3-3 W / (m*K).

[0064] In this embodiment, the heat conductive member 7 is a heat conductive structural adhesive. During the assembly process of the battery module assembly 100 of the utility model embodiment, the limit strip 6 is pre-installed on the bus 2. After the laser welding between the bus 2 and the pole of the battery cell 11 is completed, the heat conductive structural adhesive is applied to the area between the two limit strips 6 of the bus 2, and then the liquid cooling plate 3 is placed in place. The heat conductive structural adhesive is pressed by the liquid cooling plate 3 to spread the heat conductive structural adhesive. After the heat conductive structural adhesive is cured, the heat conductive member 7 is formed, and the thickness of the formed heat conductive member 7 is consistent with the thickness of the limit strip 6. The heat conductive member 7 adopts a heat conductive structural member, which can simultaneously achieve the bonding and heat conduction of the liquid cooling plate 3 and the bus 2.

[0065] The embodiments of the utility model are not limited to this. For example, in some other embodiments, the limit strip 6 is pre-installed on the liquid cooling plate 3. When the liquid cooling plate 3 and the bus 2 are connected, the thermal conductive structural adhesive is applied to the area between the two limit strips 6 of the liquid cooling plate 3, and then the thermal conductive structural adhesive is spread by pressing between the liquid cooling plate 3 and the bus 2.

[0066] The heat conducting member 7 of the embodiment of the utility model is not limited thereto. For example, in some other embodiments, the heat conducting member 7 is a non-adhesive thermal conductive adhesive or a thermal conductive pad. The non-adhesive thermal conductive adhesive or the thermal conductive pad is easy to disassemble and can meet the requirement of the liquid cooling plate 3 being removable.

[0067] The battery pack of the embodiment of the present invention includes a housing and a battery module assembly 100 according to any one of the above items.

[0068] Because the battery pack of the embodiment of the utility model has the advantages of efficient cooling and can avoid damage to the pole, thereby improving the safety of use.

[0069] The vehicle of the embodiment of the utility model includes a battery pack.

[0070] Because the vehicle of the embodiment of the utility model has the advantages of efficient cooling and can avoid damage to the pole, thereby improving the safety of use.

[0071] 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 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, 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 a limitation on the present invention.

[0072] 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 utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0073] 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.

[0074] In the present utility model, 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.

[0075] In the present utility model, 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 utility model. 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.

[0076] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify 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 busbar, the busbar being connected to the poles of the battery cells of the battery module; and A liquid cooling plate, the liquid cooling plate extends along the first direction, and the liquid cooling plate is attached to the bus along a second direction perpendicular to the first direction, the liquid cooling plate has a flat section and a raised section, a plurality of the flat sections are arranged along the first direction, the flat sections are connected to the bus, the raised sections are provided between adjacent flat sections, and the raised sections are raised in the second direction.

2. The battery module assembly according to claim 1, characterized in that: The arched section is arched, and the curvature radius of the arched section is 5mm-50mm; And / or, the liquid cooling plate comprises a plate body and ribs arranged inside the plate body, the plate body has a thickness of 0.35 mm-2 mm, and the ribs have a thickness of 0.1 mm-1 mm; And / or, the liquid cooling plate includes a plate body and an insulating layer arranged on a surface of the plate body, and a thickness of the insulating layer is greater than or equal to 0.3 mm.

3. The battery module assembly according to claim 1, characterized in that: Two adjacent battery cells have a spacing area in the first direction, and the orthographic projection of the arched segment in the second direction covers the spacing area.

4. The battery module assembly according to claim 1, characterized in that: It also includes a limiting strip, which is attached between the bus bar and the liquid cooling plate.

5. The battery module assembly according to claim 1, characterized in that: It also includes a heat conducting member, which is attached between the bus bar and the liquid cooling plate.

6. The battery module assembly according to claim 1, characterized in that: The busbar includes a plurality of first bars, each of which includes a first conductive body, a bending section, and a second conductive body that are sequentially connected along the first direction, the first conductive body being electrically connected to a pole of one of two adjacent battery cells, the second conductive body being electrically connected to a pole of the other of the two adjacent battery cells, and the bending section being bent in the second direction toward a direction close to the battery cell.

7. The battery module assembly according to claim 1, characterized in that: It also includes a first current collecting part and a second current collecting part, the first current collecting part and the second current collecting part are correspondingly arranged at the two ends of the liquid cooling plate in the first direction, the first current collecting part and the second current collecting part both include a current collector, the current collector is arranged at the two ends of the liquid cooling plate in the first direction, the current collector is provided with an insertion groove, the liquid cooling plate is inserted into the insertion groove, at least one of the first current collecting part and the second current collecting part also includes a water nozzle, and the water nozzle is arranged on the corresponding current collector.

8. The battery module assembly according to claim 7, characterized in that: The busbar also includes a second bar piece, which has a third conductive body and a connecting end, the third conductive body is connected to the pole of the battery cell located on the outermost side of the battery module in the first direction, the connecting end extends out of the battery module along the first direction, and there is a gap between the connecting end and the corresponding water nozzle in the first direction.

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, wherein the battery module assembly is arranged in the shell.

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

Images