A battery module

Abstract

The application belongs to the technical field of power batteries, and discloses a battery module. The battery module comprises a plurality of battery monomers, an end plate and an integrated liquid cooling device. The plurality of battery monomers are arranged along a first direction. The battery monomers have a first end face and a second end face oppositely arranged along a second direction. The first end face is provided with a pole column. The first direction is perpendicular to the second direction. The end plate is arranged at both ends of the plurality of battery monomers along the first direction. The integrated liquid cooling device comprises a bracket, a cold plate and a conductive piece. The bracket is provided with a first window and a second window. The cold plate is at least partially embedded in the first window. One side of the cold plate facing the battery monomers is in heat exchange connection with the first end face of the battery monomers. The pole column is exposed from the second window. The conductive piece is embedded in the bracket. Part of the conductive piece is arranged corresponding to the second window to be electrically connected with the pole column exposed in the second window. The cold plate and the conductive piece do not need to be stacked, which is conducive to reducing the height of the integrated liquid cooling device and can cover a wider use scenario.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, in particular to a battery module. BACKGROUND

[0002] At present, in the new energy industry, as the requirement for the capacity of power batteries is getting higher and higher, the height of the battery cell cannot be reduced. In order to meet the requirement for high safety, the bottom guard plate and the cover of the battery box need to be designed with reinforcing ribs. The height of the power battery is getting more and more compact, which leads to that, in the case that the total height of the battery pack is unchanged, the installation space of the liquid cooling plate at the top of the battery cell is getting smaller and smaller, so that the use scene of the power battery is limited, and it cannot meet the installation requirement of small space and the requirement of high-performance charging and discharging. SUMMARY

[0003] The purpose of the present application is to provide a battery module which can make the structure compact in the height direction and meet the use requirement in multiple scenes.

[0004] To achieve this purpose, the present application adopts the following technical scheme:

[0005] A battery module comprises:

[0006] a plurality of battery monomers arranged along a first direction, the battery monomers having a first end face and a second end face oppositely arranged along a second direction, the first end face being provided with a pole column protruding therefrom, the first direction being perpendicular to the second direction;

[0007] an end plate arranged at both ends of the plurality of battery monomers along the first direction;

[0008] an integrated liquid cooling device comprising a bracket, a cooling plate and a conductive piece, the bracket being provided with a first window and a second window, the cooling plate being at least partially embedded in the first window, one side of the cooling plate facing the battery monomers being in heat exchange connection with the first end face of the battery monomers, the pole column being exposed from the second window, the conductive piece being embedded in the bracket, part of the conductive piece being provided corresponding to the second window to be electrically connected with the pole column exposed in the second window.

[0009] As an optional scheme of the above battery module, a plurality of the second windows are arranged at intervals along the first direction to form a window group, a plurality of the window groups are arranged at intervals along a third direction, the first window is arranged between two adjacent window groups, and the third direction is perpendicular to the first direction and the second direction respectively.

[0010] And / or, an edge of the first window is provided with a protruding reinforcing portion away from the side of the battery monomer, the reinforcing portion is provided with a recessed clamping groove away from the side of the battery monomer, and at least part of the edge of the cold plate is located in the clamping groove; The cold plate is provided with a heat-conducting layer away from the side of the battery monomer, and the edge of the heat-conducting layer is located in the clamping groove, so that the bottom surface of the heat-conducting layer and the bottom surface of the support abut the first end surface of the plurality of battery monomers.

[0011] As an optional solution of the above battery module, the support includes a support body, the first window and the second window are arranged on the support body, and a fixing portion is protruded away from the side of the battery monomer; At least part of the conductive piece is embedded in the fixing portion.

[0012] One end of the fixing portion extends to the reinforcing portion and at least partially overlaps the clamping groove.

[0013] As an optional solution of the above battery module, the fixing portion includes a first fixing portion, the first fixing portion is arranged on the support body between two adjacent second windows and forms a fixing hole with the support body, the middle part of the conductive piece is embedded in the fixing hole, and the two ends of the conductive piece correspond to the two adjacent second windows.

[0014] As an optional solution of the above battery module, the fixing portion includes a second fixing portion, the second fixing portion surrounds the periphery of the second window and forms at least one notch, one end of the conductive piece extends from the notch, and the other end of the conductive piece corresponds to the second window.

[0015] The second fixing portion is provided with a recessed limiting groove away from the side of the pole, and the limiting groove is used for limiting the other end of the conductive piece.

[0016] As an optional solution of the above battery module, the cold plate includes a flat plate and a flow channel plate connected to each other, the flat plate is away from the battery monomer, and part of the flow channel plate is bent and protruded away from the direction of the flat plate to form a liquid cooling flow channel with the flat plate.

[0017] As an optional solution of the above battery module, the cold plate includes a cold plate body and a pipe assembly, the cold plate body is embedded in the first window, part of the cold plate body extends out of the support in the first direction to form an extension end, and the extension end is connected with the pipe assembly.

[0018] The end plate is provided with a mounting hole penetrating in the second direction, and the pipe assembly extends into the mounting hole.

[0019] The side of the end plate away from the battery cell is provided with a connecting hole, and the mounting hole is communicated with the connecting hole to expose part of the pipe assembly.

[0020] As an optional solution of the above battery module, the protruding end portion is embedded in the bracket, and at least part of the liquid cooling flow channel of the protruding end is exposed to the bracket.

[0021] As an optional solution of the above battery module, the first end surface of the battery cell is provided with a support, the support is provided with a fixing column protruding thereon, a through hole is arranged on the cold plate, and a fastener passes through the through hole and cooperates with the fixing column to fasten, so as to fix the integrated liquid cooling device and the battery cell.

[0022] The periphery of the cold plate provided with the through hole is protruded in the direction away from the battery cell.

[0023] As an optional solution of the above battery module, the first end surface of the battery cell is provided with a groove, the support is fixed in the groove, so that the support is in the same plane as the first end surface, and the first end surface is provided with an insulating layer covering the support.

[0024] The beneficial effects of the present application are as follows:

[0025] In the battery module provided by the present application, the cold plate and the conductive part are embedded in the bracket and cooperate with the battery cell through the first window and the second window respectively, and the cold plate and the conductive part do not need to be stacked, which is beneficial to reduce the height of the integrated liquid cooling device, so that the overall height of the power battery is smaller, and the use scenarios can be covered more widely.

[0026] The bracket is adhesively fixed with the battery cell, which is beneficial to ensure good contact between the cold plate and the conductive part and the battery cell, so as to ensure the cooling effect and the reliability of the electrical connection.

[0027] The cold plate is connected with the support of the battery cell, which is beneficial to ensure good contact between the cold plate and the battery cell, so as to ensure the cooling effect; in addition, the connection between the cold plate and the support of the battery cell can also ensure the adhesion effect of the conductive part and the pole, so as to ensure the reliability of the electrical connection.

[0028] The mounting hole is arranged in the end plate, the pipe assembly extends into the mounting hole and is exposed through the connecting hole on the end plate, the thickness of the side wall of the end plate in the box body can be fully utilized to accommodate the pipe assembly, and the space utilization rate can be increased.

[0029] The pipe assembly comprises a telescopic pipe, the length of the telescopic pipe can be adaptively adjusted, the installation redundancy can be increased, and the size and installation tolerance can be absorbed. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1is an exploded view of the battery module provided by the present application;

[0031] Figure 2 is an exploded view of the integrated liquid cooling device provided by the present application;

[0032] Figure 3 is Figure 2 is a partial enlarged view at A in the figure;

[0033] Figure 4 is a sectional view of the integrated liquid cooling device provided by the present application;

[0034] Figure 5 is Figure 4 is a partial enlarged view at B in the figure;

[0035] Figure 6 is a structural schematic view of the battery module provided by the present application;

[0036] Figure 7 is a structural schematic view of the integrated liquid cooling device provided by the present application without the electrically conductive member;

[0037] Figure 8 is an exploded view of the battery monomer provided by the present application;

[0038] Figure 9 is a structural schematic view of the plurality of battery monomers provided by the present application.

[0039] in the figure:

[0040] 100, integrated liquid cooling device; 10, support; 11, support body; 111, first window; 112, second window; 113, reinforcing part; 1131, clamping groove; 1132, protruding hole; 1133, avoiding groove; 114, wire harness fixing structure; 12, fixing part; 12a, first fixing part; 12b, second fixing part; 121, fixing hole; 122, notch; 123, limiting groove; 20, cold plate; 21, cold plate body; 2101, liquid cooling flow channel; 2102, protruding end; 211, flow channel plate; 2111, flow channel protruding rib; 212, flat plate; 22, pipe assembly; 221, flexible pipe; 222, pipe joint; 30, electrically conductive member; 40, collection wire harness; 41, collection sheet; 50, heat-conducting layer; 60, second adhesive layer; 200, battery monomer; 201, battery cell body; 2011, groove; 202, pole; 203, support; 204, fixing column; 205, fastener; 206, insulating layer; 207, first adhesive layer; 300, battery box; 310, end plate; 311, mounting hole; 312, connecting hole; 400, foam layer. DETAILED DESCRIPTION

[0041] The application will be described in further detail below with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not to be used as limitations in the scope of the application. In addition, it is to be understood that, for ease of description, only the parts related to the application are shown in the drawings rather than all the parts.

[0042] In the description of the present application, unless specifically defined and limited otherwise, the terms "connected", "connected to", "fixed", "fixed to" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the present application, unless specifically defined and limited otherwise, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "below" and "below" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0044] In the description of the present embodiment, the terms "up", "down", "right", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] As Figure 1 As shown in the drawings, the present embodiment provides a battery module including a plurality of battery cells 200. The battery cell 200 is the smallest unit in the battery that performs an electrochemical reaction. The battery cell 200 can be a secondary battery or a primary battery. The battery cell 200 can be a lithium-sulfur battery, a sodium-ion battery, a lithium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 200 can be in the shape of a cylinder, a flat body, a cuboid, a prism, or other shapes.

[0046] The embodiment provides a battery module, which comprises an integrated liquid cooling device 100, a battery box 300 and a plurality of battery monomers 200. The plurality of battery monomers 200 are arranged along a first direction X and located in the battery box 300, the battery monomer 200 comprises a battery core body 201 and a pole 202, the battery core body 201 comprises a first end face and a second end face oppositely arranged along a second direction Z, and the pole 202 is protruded on the first end face of the battery core body 201; the integrated liquid cooling device 100 is arranged on one side of the first end face of the plurality of battery monomers 200, the integrated liquid cooling device 100 can cool the first end face of the battery monomer 200 and electrically connect the plurality of battery monomers 200.

[0047] In some embodiments, the battery core body 201 comprises a shell, an end cover and an electrode assembly. The shell and the end cover jointly form an internal space for accommodating the electrode assembly. Specifically, the shell is formed with an accommodating cavity, and at least one end is open. The end cover is covered on the open end of the shell to close the accommodating cavity, and the electrode assembly is loaded in the accommodating cavity. The shell can be but is not limited to a metal shell, such as an aluminum shell, a steel shell and the like. The electrode assembly generally comprises a positive electrode sheet, a negative electrode sheet and a separator separating the positive electrode sheet and the negative electrode sheet. An electrolyte can be injected into the battery monomer, and the electrolyte can be soaked into the interior of the electrode assembly to provide an ion migration path for the electrochemical reaction of the electrode assembly and play a role of electric conduction. The electrode assembly can be in the form of a winding type, a laminated type and the like. One or more electrode assemblies can be loaded in the battery monomer. The battery monomer is provided with a pole and a pressure relief valve. In some embodiments, the pole and the pressure relief valve are arranged on the same side of the battery monomer. Specifically, the pole and the pressure relief valve are arranged on the end cover. In other embodiments, the pole and the pressure relief valve are arranged on different sides of the battery monomer.

[0048] In some embodiments, the shape of the battery monomer 200 is rectangular, the length direction of the battery monomer 200 is a third direction Y, the width direction of the battery monomer 200 is the first direction X, and the height direction of the battery monomer 200 is the second direction Z. The pole 202 is arranged on both ends of the first end face of the battery monomer 200 along the third direction Y, and the integrated liquid cooling device 100 is located above the battery monomer 200. That is, the top surface of the battery core body 201 is provided with the pole 202. At this time, the pressure relief valve can be arranged on the first end face, or the pressure relief valve can be arranged on the second end face, or the pressure relief valves of part of the battery monomers are arranged on the first end face, and the pressure relief valves of part of the battery monomers are arranged on the second end face, which can be arranged as required, and the application is not limited.

[0049] In some embodiments, the opposite two sides of the battery monomer 200 along the first direction X are provided with a foam layer 400, the foam layer 400 can separate the adjacent battery monomers 200 and buffer the stress between the adjacent battery monomers 200, so as to ensure the safety of the battery monomer 200.

[0050] As shown in Figure 2 , the integrated liquid cooling device 100 includes a bracket 10, a cold plate 20, and a conductive piece 30. The bracket 10 is provided with a first window 111 and a second window 112. The cold plate 20 is at least partially embedded in the first window 111. One side of the cold plate 20 facing the battery monomer 200 is in heat exchange connection with the first end surface of the battery monomer 200. The pole 202 is exposed from the second window 112. The conductive piece 30 is embedded in the bracket 10. Part of the conductive piece 30 is provided corresponding to the second window 112 to be electrically connected with the pole 202 exposed in the second window 112.

[0051] In the integrated liquid cooling device 100, the cold plate 20 and the conductive piece 30 are embedded in the bracket 10 and cooperate with the battery monomer 200 through the first window 111 and the second window 112 respectively. The cold plate 20 and the conductive piece 30 do not need to be stacked, which is conducive to reducing the height of the integrated liquid cooling device 100, so that the overall height is smaller and can cover a wider range of use scenarios.

[0052] In some embodiments, as shown in Figure 2 , a plurality of second windows 112 are arranged in the first direction X to form a window group. A plurality of window groups are arranged in the third direction Y. The first window 111 is arranged between two adjacent window groups. This arrangement facilitates the connection of the conductive piece 30 with the poles 202 of the battery monomer 200 at both ends in the third direction Y, and the heat exchange cooperation of the cold plate 20 with the first end surface of the battery monomer 200 between the two poles 202, which is conducive to rational use of space and improves the heat exchange contact area.

[0053] Exemplarily, as shown in Figure 2 , two window groups are provided. The two window groups are respectively located at both ends of the bracket 10 in the third direction Y and are respectively arranged corresponding to the poles 202 of the plurality of battery monomers 200. The first window 111 is located between the two window groups. In other embodiments, the window group can also be provided with a plurality of window groups, as long as one first window 111 is provided between two window groups.

[0054] In some embodiments, the side of the bracket 10 facing the battery monomer 200 is provided with a second adhesive layer 60. The second adhesive layer 60 is used to connect the battery monomer 200 to fix the bracket 10 and the plurality of battery monomers 200, improve the contact area of the bracket 10 and the plurality of battery monomers 200, and improve the overall strength.

[0055] In some embodiments, as shown in Figure 2 and Figure 3As shown, the support 10 comprises a support body 11, the first window 111 and the second window 112 are arranged on the support body 11, the edge of the first window 111 away from one side of the battery monomer 200 is provided with a protruding reinforcing portion 113, the reinforcing portion 113 is provided with a recessed clamping groove 1131 towards one side of the battery monomer 200, and at least part of the edge of the cold plate 20 is located in the clamping groove 1131. By arranging the reinforcing portion 113, the strength of the support body 11 can be improved to meet the fixing requirements of the cold plate 20 and the conductive part 30; by arranging the clamping groove 1131 on the reinforcing portion 113, the fixing effect of the cold plate 20 and the support body 11 can be improved, thereby improving the stability of the cold plate 20. At the same time, the cold plate 20 can be pressed on the battery monomer 200 through the clamping groove 1131 to improve the heat exchange effect.

[0056] It should be noted here that, taking the first end surface as the top surface of the battery monomer main body 201 as an example, the reinforcing portion 113 is protruded on the top surface of the support body 11, and the clamping groove 1131 is recessed on the bottom surface of the reinforcing portion 113. On the one hand, the reinforcing portion 113 is protruded on the top, and on the other hand, the clamping groove 1131 is recessed on the bottom, so as to maintain the strength of the support body 11.

[0057] In some embodiments, the support body 11 is made of plastic material, which is low in cost, light in weight, and insulating, so as to avoid short circuit between the conductive parts 30. Alternatively, the support body 11 is formed by injection molding process.

[0058] In some embodiments, the cold plate 20 and the support body 11 can be fixedly connected by injection molding process. That is, the cold plate 20 is pre-embedded in a mold for forming the support body 11, and the cold plate 20 and the support body 11 are fixedly connected when the support body 11 is injection molded, which not only simplifies the process and structure, but also is reliable in fixation.

[0059] In some embodiments, the conductive part 30 and the support body 11 can be fixedly connected by injection molding process. That is, the conductive part 30 is pre-embedded in a mold for forming the support body 11, and the conductive part 30 and the support body 11 are fixedly connected when the support body 11 is injection molded, which not only simplifies the process and structure, but also is reliable in fixation.

[0060] In some embodiments, as shown in Figure 4 As shown, the battery module further comprises an acquisition wire harness 40, the acquisition wire harness 40 is fixed on the support 10, and the acquisition wire harness 40 is connected with a plurality of acquisition sheets 41, the acquisition sheets 41 are connected with the conductive part 30 to realize transmission of electrical signals.

[0061] Alternatively, the acquisition sheet 41 can be an acquisition nickel sheet.

[0062] In some embodiments, the collection wire harness 40 is arranged on the side of the bracket body 11 away from the battery monomer 200, and the collection wire harness 40 does not need to pass through the liquid cooling flow channel 2101, which is conducive to realizing water and electricity separation.

[0063] In some embodiments, the bracket body 11 is provided with a wire harness fixing structure 114, and the collection wire harness 40 is fixed on the bracket body 11 through the wire harness fixing structure 114, thereby improving the overall integration.

[0064] Optionally, the wire harness fixing structure 114 can include a wire harness fixing hole for fixing a wire harness band, and the wire harness band is used to tighten the collection wire harness 40 to fix the position of the collection wire harness 40.

[0065] In some embodiments, in combination with Figure 4 and Figure 5 As shown in FIG. 1, the cold plate 20 is provided with a heat conduction layer 50 on the side facing the battery monomer 200, and the edge of the heat conduction layer 50 is located in the clamping groove 1131, so that the bottom surface of the heat conduction layer 50 and the bottom surface of the bracket 10 jointly abut the first end surface of the plurality of battery monomers 200. By arranging the heat conduction layer 50, the contact effect is guaranteed, thereby improving the heat exchange efficiency between the battery monomer 200 and the cold plate 20.

[0066] Optionally, the heat conduction layer 50 can be made of a heat conduction material. For example, the heat conduction layer 50 is a heat conduction adhesive layer, which not only can accelerate heat conduction, but also can connect the cold plate 20 and the first end surface of the battery monomer 200 to guarantee the contact effect. The heat conduction adhesive layer can absorb the assembly flatness tolerance, fill the air layer, and improve the heat conduction efficiency.

[0067] In addition, by arranging the edge of the heat conduction layer 50 in the clamping groove 1131, the edge side wall of the clamping groove 1131 and the bottom surface of the bracket body 11 can limit the heat conduction adhesive, avoid the heat conduction adhesive from overflowing, and improve the uniformity of the heat conduction adhesive. It should be noted that when the second adhesive layer 60 is not arranged, the bottom surface of the heat conduction layer 50 and the bottom surface of the bracket 10 directly abut the first end surface of the plurality of battery monomers 200. When the second adhesive layer 60 is arranged, the second adhesive layer 60 is arranged on the bottom surface of the bracket 10, and the bottom surface of the heat conduction layer 50 and the bottom surface of the second adhesive layer 60 of the bracket 10 abut the first end surface of the plurality of battery monomers 200. At this time, the side wall of the second adhesive layer 60 can also play a role in limiting the heat conduction adhesive.

[0068] In some embodiments, as shown in Figure 6As shown, the bracket 10 also includes a fixing part 12, which protrudes from the side of the bracket body 11 away from the battery cell 200. At least a portion of the conductive element 30 is embedded in the fixing part 12 so that the conductive element 30 can be located above the second window 112 so that the conductive element 30 can be electrically connected to the terminal post 202 extending from the second window 112.

[0069] In some embodiments, the end of the fixing portion 12 away from the conductive member 30 extends to the reinforcing portion 113 and at least partially overlaps with the snap-fit ​​groove 1131 to increase the connection strength between the fixing portion 12 and the bracket body 11, thereby improving the fixing effect of the fixing portion 12 on the conductive member 30. The fixing portion 12 extends to the top of the reinforcing portion 113, and the projection of the fixing portion 12 in the height direction of the bracket 10 partially overlaps with the projection of the snap-fit ​​groove 1131. This design not only further extends the length of the fixing portion 12, but also extends the width of the snap-fit ​​groove 1131, thereby increasing the contact area between the snap-fit ​​groove 1131 and the cold plate 20.

[0070] In some embodiments, such as Figure 7 As shown, the fixing part 12 includes a first fixing part 12a, which is mounted on the bracket body 11 between two adjacent second windows 112. The first fixing part 12a and the bracket body 11 form a fixing hole 121. The middle part of the conductive element 30 is embedded in the fixing hole 121, and the two ends of the conductive element 30 correspond to the two adjacent second windows 112. This arrangement allows each conductive element 30 to be fixed by only one fixing part 12, and it can cooperate with the pole post 202 extending from the two second windows 112 respectively, which helps to reduce the number of fixing parts 12 and make reasonable use of the space on the bracket body 11. At the same time, the first fixing part 12a extends to the top of the reinforcing part 113 and together with the side wall of the reinforcing part 113, it forms the fixing hole 121, which improves the space utilization rate and the strength of the fixing hole 121 along the height direction. It also allows the width of the fixing hole 121 to be maximized in a limited space, which facilitates the fixing of the conductive element 30.

[0071] In some embodiments, the fixing part 12 includes a second fixing part 12b, which surrounds the periphery of the second window 112 and forms at least one notch 122. One end of the conductive member 30 extends from the notch 122 in a direction away from the bracket 10 to facilitate electrical connection with an external structure. The other end of the conductive member 30 corresponds to the second window 112 to be electrically connected with the pole post 202.

[0072] Exemplarily, in each of the two window groups, the periphery of the second window 112 at the outermost end along the first direction X is provided with the second fixing part 12b, and the remaining second windows 112 are each provided with a first fixing part 12a between two second windows 112. In the other window group, the periphery of the second window 112 at the outermost end along the first direction X is provided with the second fixing part 12b, and the remaining second windows 112 are each provided with a first fixing part 12a between two second windows 112. This arrangement allows the corresponding second window 112 of the two second fixing parts 12b to be located at the edge of the first direction X, facilitating the corresponding conductive part 30 to extend out through the gap 122 to be electrically connected to the external structure, serving as the output end and input end of the plurality of battery monomers 200. In other embodiments, the two second fixing parts 12b can also be arranged at the same end of the first direction X, which can be arranged as needed.

[0073] In some embodiments, the second fixing part 12b is provided with a recessed limiting groove 123 on the side facing the battery monomer 200, which is used to limit the other end of the conductive part 30, so as to improve the fixing effect of the conductive part 30.

[0074] It should be noted here that the side of the second fixing part 12b facing the battery monomer 200 refers to the side of the second fixing part 12b facing the center direction of the second window 112, that is, the inner wall surface of the space surrounded by the second fixing part 12b is provided with the limiting groove 123. The limiting groove 123 can limit the position of the conductive part 30 along the second direction Z, and at the same time, the limiting groove 123 extends along the edge of the second window 112, which can limit the position of the conductive part 30 along the first direction X and the third direction Y, thereby improving the connection reliability of the conductive part 30.

[0075] In some embodiments, in combination with Figure 5 As shown, the cold plate 20 includes a flow channel plate 211 and a flat plate 212 connected to each other, the flat plate 212 faces the battery monomer 200, and part of the flow channel plate 211 is curved and protruded in a direction away from the flat plate 212 to form a liquid cooling flow channel 2101 together with the flat plate 212, and the liquid cooling flow channel 2101 protrudes towards the first window 111.

[0076] Specifically, the side of the flow channel plate 211 facing the flat plate 212 is provided with a flow channel groove, and correspondingly, the side of the flow channel plate 211 away from the flat plate 212 is formed with a flow channel convex ridge 2111 at the position of the flow channel groove. After the flow channel plate 211 is connected with the flat plate 212, the flow channel groove and the flat plate 212 enclose the liquid cooling flow channel 2101. With this arrangement, the liquid cooling flow channel 2101 is formed in the space above the flat plate 212, and the flat plate 212 does not need to be bent, so the thickness of the flat plate 212 can be relatively small. At the same time, the flow channel plate 211 uses the depth of the first window 111 to accommodate the flow channel groove and the flow channel convex ridge 2111, which reduces the impact on the overall height of the battery module.

[0077] With reference to Figure 7 , the cold plate 20 includes a cold plate body 21 and a pipe assembly 22. The cold plate body 21 includes the flow channel plate 211 and the flat plate 212. Part of the cold plate body 21 is embedded in the first window 111, and part of the cold plate body 21 extends out of the bracket 10 in the first direction X to form an extended end 2102. The extended end 2102 is connected with the pipe assembly 22, so that the cooling medium can be introduced into or discharged from the liquid cooling flow channel 2101 through the pipe assembly 22.

[0078] In some embodiments, part of the extended end 2102 is embedded in the bracket 10, and part of the extended end 2102 extends out of the bracket 10, so that the liquid cooling flow channel 2101 can be communicated with the external structure through the pipe assembly 22. At the same time, part of the liquid cooling flow channel 2101 on the extended end 2102 is exposed to the bracket 10, so as to further save the space in the height direction.

[0079] In some embodiments, as shown in Figure 3 , the reinforcing portion 113 is provided with an extended hole 1132 extending in the first direction X. The extended hole 1132 is communicated with the clamping groove 1131, so that part of the edge of the cold plate body 21 can extend out of the bracket 10 in the first direction X through the extended hole 1132, which simplifies the structure and ensures the contact area of the cold plate 20 and the bracket 10, and ensures the connection reliability. An avoidance groove 1133 is formed on the hole wall of the extended hole 1132, which is used to avoid the liquid cooling flow channel 2101 connected with the pipe assembly 22, so as to balance the reliability of the connection of the cold plate 20 and the overall height of the reinforcing portion 113, and further improve the space utilization.

[0080] Exemplarily, the cold plate body 21 is formed with an extended end 2102 at each end in the first direction X. Two pipe assemblies 22 are connected with the two extended ends 2102, respectively. One pipe assembly 22 is used for the inflow of the cooling medium, and the other pipe assembly 22 is used for the outflow of the cooling medium.

[0081] In some embodiments, the pipe assembly 22 includes a telescopic pipe 221 and a pipe connector 222. Both ends of the telescopic pipe 221 are connected to pipe connectors 222. One pipe connector 222 communicates with the protruding end 2102, and the other pipe connector 222 extends into the connection hole 312 to communicate with external equipment. By providing the telescopic pipe 221, installation redundancy can be increased and tolerances can be absorbed.

[0082] Optionally, the telescopic tube 221 can be a corrugated tube.

[0083] In some embodiments, the telescopic tube 221 and the pipe fitting 222 can be connected by a thermoplastic process to improve the connection effect and simplify the structure.

[0084] In some embodiments, combined with Figure 1 and Figure 6 As shown, the battery housing 300 includes two end plates 310 arranged opposite each other along a first direction X to hold multiple battery cells 200. The battery housing 300 also includes two side plates arranged opposite each other along a third direction Y. The side plates and end plates 310 form a receiving cavity to accommodate the multiple battery cells 200. The end plates 310 are provided with mounting holes 311 extending through along a second direction Z, into which tube assemblies 22 extend. A connection hole 312 is provided on the side of the end plate 310 opposite to the battery cells 200, communicating with the mounting hole 311 to expose part of the tube assembly 22, thus facilitating connection of the tube assembly 22 to other structures. This arrangement utilizes the internal space of the end plates 310 to arrange the tube assembly 22, which is beneficial for efficient space utilization, reducing the overall size of the battery module, and also provides protection for the tube assembly 22.

[0085] like Figure 8 As shown, in some embodiments, in order to ensure sufficient contact between the cold plate 20 and the battery cell 200, a support 203 is provided on the first end face of the cell body 201, and a fixing post 204 is protruding on the support 203. A through hole is provided on the cold plate 20, and a fastener 205 passes through the through hole and is fastened to the fixing post 204 to fix the integrated liquid cooling device 100, improve the reliability of the integrated liquid cooling device 100, and ensure sufficient contact between the integrated liquid cooling device 100 and the battery cell 200.

[0086] In addition, the fixing column 204 is fixed to the cold plate 20 by the fastener 205, which can resist the reaction force of the heat-conducting layer 50 on the cold plate 20, reduce the deflection of the cold plate 20, and improve the heat conduction efficiency.

[0087] Optionally, the fastener 205 can be a rivet, which connects the cold plate 20 and the battery cell 200, thereby reducing the height of the battery module along the second direction Z.

[0088] In addition, by fixing the cold plate 20 to the battery monomer 200, the fixing of the entire integrated liquid cooling device 100 can be achieved, which is conducive to ensuring the conductive contact effect of the conductive part 30 and the pole 202.

[0089] Optionally, the cold plate 20 is provided with a peripheral edge of the through hole protruding away from the battery monomer 200, so as to strengthen the structure of the cold plate 20, reduce the influence of the through hole on the strength of the cold plate 20, and avoid fatigue fracture due to stress concentration at the fixed position of the cold plate 20.

[0090] In some embodiments, the first end surface of the battery cell body 201 is provided with a groove 2011, and the support 203 is arranged in the groove 2011, so that the support 203 is in the same plane as the first end surface, avoiding the support 203 protruding from the first end surface to affect the contact between the battery cell body 201 and the cold plate 20, and increasing the overall height. The groove 2011 is arranged between the two poles 202 arranged along the third direction Y, so as to reasonably utilize the space.

[0091] In some embodiments, the support 203 and the groove 2011 can be fixedly connected through the first adhesive layer 207, so as to improve the structural strength of the support 203 and the battery cell body 201.

[0092] In some embodiments, the support 203 and the groove 2011 can be fixedly connected through welding, so as to improve the connection strength of the support 203 and the battery cell body 201.

[0093] In some embodiments, the battery monomer 200 further comprises an insulating layer 206, which covers the first end surface of the battery cell body 201 and covers the support 203. The fixed column 204 and the pole 202 all pass through the insulating layer 206.

[0094] Optionally, the insulating layer 206 can be sprayed or printed on the first end surface of the battery cell body 201 by UV, which is conducive to improving the tensile strength between the battery monomer 200 and the support 10, and enhancing the structural strength of the support 203 and the battery cell body 201.

[0095] In some embodiments, part of the battery monomers 200 in the plurality of battery monomers 200 are provided with the support 203, so as to simplify the structure, simplify the assembly steps, and reduce the cost while ensuring the fixing effect of the cold plate 20 and the contact effect with the battery cell body 201.

[0096] Exemplarily, as shown in Figure 9 Two of the plurality of battery monomers 200 are provided with the support 203, and the two supports 203 are respectively located at the two ends of the battery module along the first direction X, so as to improve the fixing effect and facilitate the full contact of the cold plate 20 with each battery monomer 200.

[0097] Obviously, the above embodiments of the present application are merely exemplary but not intended to limit the embodiments of the present application. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the scope of the present application. It is not necessary or possible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A battery module, characterized by, include: Multiple battery cells (200) are arranged along a first direction. Each battery cell (200) has a first end face and a second end face that are arranged opposite to each other along a second direction. An electrode post (202) is protruding from the first end face. The first direction is perpendicular to the second direction. End plates (310) are disposed at both ends of the plurality of battery cells (200) along the first direction; An integrated liquid cooling device (100) includes a bracket (10), a cold plate (20), and a conductive element (30). The bracket (10) is provided with a first window (111) and a second window (112). The first window (111) penetrates the bracket (10). The cold plate (20) is at least partially embedded in the first window (111). The side of the cold plate (20) facing the battery cell (200) is heat-exchange connected to the first end face of the battery cell (200). The electrode post (202) is exposed from the second window (112). The conductive element (30) is embedded in the bracket (10). Part of the conductive element (30) is correspondingly arranged with the second window (112) to be electrically connected to the electrode post (202) exposed in the second window (112). The edge of the first window (111) is provided with a raised reinforcing part (113) on the side away from the battery cell (200), and the reinforcing part (113) is provided with a recessed snap-fit ​​groove (1131) on the side facing the battery cell (200). At least a portion of the edge of the cold plate (20) is located in the snap-fit ​​groove (1131). The bracket (10) includes a bracket body (11), the first window (111) and the second window (112) are disposed on the bracket body (11), and a fixing part (12) is protruding on the side of the bracket body (11) away from the battery cell (200), and at least part of the conductive element (30) is embedded in the fixing part (12). One end of the fixing part (12) extends to the reinforcing part (113) and at least partially overlaps with the snap-fit ​​groove (1131); The first end face of the battery cell (200) is provided with a support (203), and a fixing post (204) is protruding on the support (203). A through hole is provided on the cold plate (20), and a fastener (205) passes through the through hole and engages with the fixing post (204) to fix the integrated liquid cooling device (100) to the battery cell (200).

2. The battery module of claim 1, wherein, Multiple second windows (112) are spaced apart along the first direction to form a window group, and multiple groups of the window group are spaced apart along a third direction. The first window (111) is located between two adjacent groups of the window group, and the third direction is perpendicular to the first direction and the second direction, respectively. And / or, the cold plate (20) is provided with a heat conduction layer (50) on the side facing the battery monomer (200), the edge of the heat conduction layer (50) is located in the clamping groove (1131), so that the bottom surface of the heat conduction layer (50) and the bottom surface of the support (10) are abutted on the first end surface of the plurality of battery monomers (200) together.

3. The battery module of claim 1, wherein, The fixed part (12) includes a first fixed part (12a) which is arranged on the support body (11) between two adjacent second windows (112) and forms a fixed hole (121) with the support body (11), the middle part of the conductive part (30) is embedded in the fixed hole (121), and the two ends of the conductive part (30) correspond to two adjacent second windows (112).

4. The battery module of claim 1, wherein, The fixed part (12) includes a second fixed part (12b) which is arranged around the periphery of the second window (112) and forms at least one notch (122), one end of the conductive part (30) extends from the notch (122), and the other end of the conductive part (30) corresponds to the second window (112). The second fixed part (12b) is provided with a recessed limiting groove (123) on the side facing the pole (202), and the limiting groove (123) is used for limiting the other end of the conductive part (30).

5. The battery module of claim 1, wherein, The cold plate (20) includes a flat plate (212) and a flow channel plate (211) connected to each other, the flat plate (212) faces the battery monomer (200), and part of the flow channel plate (211) is curved and protruded in the direction away from the flat plate (212) to form a liquid cooling flow channel (2101) with the flat plate (212).

6. The battery module of claim 5, wherein, The cold plate (20) includes a cold plate body (21) and a pipe assembly (22), the cold plate body (21) is embedded in the first window (111), part of the cold plate body (21) extends out of the support (10) in the first direction to form an extension end (2102), and the extension end (2102) is connected with the pipe assembly (22). The end plate (310) is provided with a mounting hole (311) penetrating in the second direction, and the pipe assembly (22) extends into the mounting hole (311). The end plate (310) is provided with a connecting hole (312) on the side away from the battery monomer (200), and the mounting hole (311) and the connecting hole (312) are communicated to expose part of the pipe assembly (22).

7. The battery module of claim 6, wherein, Part of the extension end (2102) is embedded in the support (10), and at least part of the liquid cooling flow channel (2101) of the extension end (2102) is exposed to the support (10).

8. The battery module of any one of claims 1-7, wherein, The cold plate (20) is provided with a periphery of the through hole which is protruded in the direction away from the battery monomer (200).

9. The battery module of claim 8, wherein, The first end surface of the battery cell (200) is provided with a groove (2011), the support (203) is fixed to the groove (2011), so that the support (203) is in the same plane with the first end surface, the first end surface is provided with an insulating layer (206), and the insulating layer (206) covers the support (203).

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