Battery module side plate assembly, battery module and battery pack

Abstract

The utility model discloses a battery module side plate assembly, a battery module and a battery pack, and relates to the technical field of power batteries. The liquid cooling structure comprises two side plates, at least one side plate comprises a first side part and a second side part, the first side part is in surface contact with a battery cell, the first side part and the second side part are welded to form a liquid cooling channel, and the liquid cooling channel is communicated with a liquid path of a battery liquid cooling system. The liquid cooling plate and the side plate are integrated, and the heat transfer path of the battery cell is directly changed from the battery cell to the side plate, so that the assembly difficulty of the battery module is reduced. Moreover, the first side part and the second side part are welded to form the liquid cooling channel, so that the liquid cooling contact area with the battery cell can be ensured, and the heat transfer efficiency of the battery cell is comprehensively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a battery module side plate assembly battery module and a battery pack. Background Art

[0002] New energy vehicles usually include pure electric vehicles, fuel cell electric vehicles, hybrid electric vehicles, etc., which usually need to accommodate power battery modules. With the increase in the market share of new energy vehicles, their cruising range has become an important indicator for measuring vehicle performance. In order to increase the cruising range, the requirements for the integration of cells accommodated in the power battery module are gradually increasing. Therefore, the current cooling method for battery modules is generally to set a liquid cooling plate on the periphery of the battery module. The liquid cooling plate is fixed to the battery module through thermal conductive structural adhesive. The heat conduction path of the battery cell is from the battery cell to the fixed plate, then through the fixed plate to the thermal conductive adhesive, and finally to the liquid cooling plate. This increases the difficulty of assembly between the module and the liquid cooling plate, and reduces the heat transfer efficiency of the battery cell. Utility Model Content

[0003] In view of the above problems, the present utility model is proposed to provide a battery module side plate assembly, a battery module and a battery pack that overcome the above problems or at least partially solve the above problems.

[0004] Based on the first aspect of the utility model, a battery module side panel assembly is provided, wherein the side panel assembly includes two side panels, at least one side panel includes a first side portion and a second side portion, wherein the first side portion contacts the battery cell surface, the first side portion and the second side portion are welded to form a liquid cooling channel, and the liquid cooling channel is connected to the liquid circuit of the battery liquid cooling system.

[0005] An optional utility model content, the first side portion and the second side portion are respectively made of aluminum alloy material.

[0006] An optional utility model content, the thermal conductivity corresponding to the first side portion and the second side portion is greater than or equal to 235 W / (m·K).

[0007] An optional utility model content, a portion of the second side portion is concavely arranged toward the first side portion to form at least one reinforcement groove.

[0008] An optional utility model content, the upper and lower ends of the first side portion are respectively provided with folded edges, and the two folded edges cooperate to form a clamping connection for the battery core.

[0009] An optional utility model content, the side panel assembly also includes a front end panel and a rear end panel, wherein the two side panels, the front end panel and the rear end panel cooperate to form a receiving cavity for installing the battery cell.

[0010] Based on the second aspect of the utility model, a battery module is also provided, which includes a battery module side panel assembly and at least one battery cell as described in any one of the above utility models, wherein the first side portion is in contact with the battery cell surface, and a thermal conductive adhesive layer is arranged between the first side portion and the battery cell.

[0011] An optional utility model content, in the case where both of the two side panels include a first side portion and a second side portion, the battery module further includes a hose, wherein the liquid cooling channels on the two side panels are connected by a liquid path through the hose.

[0012] An optional utility model content, the liquid outlet and the liquid inlet of the liquid cooling channel of the side plate are respectively provided with fixed joints, and the two ends of the hose are respectively provided with quick-change joints, and the fixed joints are press-connected with the quick-change joints.

[0013] Based on the third aspect of the utility model, a battery pack is also provided, the battery pack comprising a battery module as described in any one of the above utility models.

[0014] Compared with the prior art, the utility model discloses a battery module side panel assembly, a battery module and a battery pack. The utility model includes two side panels, at least one side panel includes a first side portion and a second side portion, wherein the first side portion contacts the surface of the battery cell, the first side portion and the second side portion are welded to form a liquid cooling channel, and the liquid cooling channel is connected to the liquid circuit of the battery liquid cooling system. The liquid cooling plate and the side panel are integrated, and the heat transfer path of the battery cell directly becomes from the battery cell to the side panel, thereby reducing the difficulty of assembling the battery module. In addition, by welding the first side portion and the second side portion to form a liquid cooling channel, the liquid cooling contact area with the battery cell can be guaranteed, and the heat transfer efficiency of the battery cell is comprehensively improved.

[0015] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.

[0017] In the attached picture:

[0018] Figure 1It is a structural schematic diagram of a battery module side panel assembly provided by an embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of a battery module provided by an embodiment of the utility model;

[0020] Figure numerals: 1, side panel; 101, liquid cooling channel; 11, first side portion; 12, second side portion; 121, reinforcement groove; 13, folded edge; 2, battery cell; 3, front end panel; 4, rear end panel; 5, hose; 6, fixed joint; 7, quick-change joint. DETAILED DESCRIPTION

[0021] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0022] The current cooling method for battery modules is generally to set a liquid cooling plate on the periphery of the battery module. The liquid cooling plate is fixed to the battery module through heat-conducting structural adhesive. The heat conduction path of the battery cell 2 is from the battery cell 2 to the fixing plate, then through the fixing plate to the heat-conducting adhesive, and finally to the liquid cooling plate. This increases the difficulty of assembly between the module and the liquid cooling plate, and reduces the heat transfer efficiency of the battery cell 2. Based on the above technical problems, the present utility model is proposed.

[0023] The utility model discloses a battery module side panel assembly, a battery module and a battery pack, which include two side panels 1, at least one side panel 1 includes a first side portion 11 and a second side portion 12, wherein the first side portion 11 is in surface contact with a battery cell 2, the first side portion 11 and the second side portion 12 are welded to form a liquid cooling channel 101, and the liquid cooling channel 101 is connected to the liquid path of the battery liquid cooling system. The liquid cooling plate and the side panel 1 are integrated, and the heat transfer path of the battery cell 2 is directly changed from the battery cell 2 to the side panel 1, thereby reducing the difficulty of assembling the battery module. In addition, by welding the first side portion 11 and the second side portion 12 to form the liquid cooling channel 101, the liquid cooling contact area with the battery cell 2 can be ensured, and the heat transfer efficiency of the battery cell 2 is comprehensively improved.

[0024] The battery module side panel assembly, battery module and battery pack disclosed in the following utility model embodiments are all used in new energy vehicles, including but not limited to pure electric vehicles, fuel cell electric vehicles and hybrid electric vehicles.

[0025] Reference Figure 1 and Figure 2An embodiment of the utility model provides a battery module side panel assembly, the side panel assembly includes two side panels 1, at least one side panel 1 includes a first side portion 11 and a second side portion 12, wherein the first side portion 11 is in surface contact with the battery cell 2, the first side portion 11 and the second side portion 12 are welded to form a liquid cooling channel 101, and the liquid cooling channel 101 is connected to the liquid circuit of the battery liquid cooling system.

[0026] In the embodiment of the utility model, the side panel assembly refers to the general term for a series of components that support, fix and protect the battery cells 2 of the battery module. For example, the side panel assembly may include two side panels 1, and the two side panels 1 are respectively arranged on both sides of the battery cells 2 of the battery module, and form surface contact with the battery cells 2. Among them, at least one of the side panels 1 may include a first side portion 11 and a second side portion 12, and the end surface of the first side portion 11 away from the second side portion 12 is in surface contact with the battery cell 2. The first side portion 11 and the second side portion 12 form a liquid cooling channel 101 by welding. Thus, the liquid cooling channel 101 can be provided on one of the side panels 1, or can be provided on both side panels 1. In some preferred embodiments, in order to improve the heat dissipation efficiency of the battery cell 2, the liquid cooling channel 101 can be provided on the two side panels 1 respectively.

[0027] By integrating the liquid cooling plate and the side plate 1, the heat transfer path of the battery cell 2 is directly changed from the battery cell 2 to the side plate 1, thereby reducing the difficulty of assembling the battery module. The number of parts of the battery module is reduced, and the assembly space required for the battery module is reduced. In addition, by welding the first side portion 11 and the second side portion 12 to form a liquid cooling channel 101, the liquid cooling contact area with the battery cell 2 can be ensured, and the heat transfer efficiency of the battery cell 2 is comprehensively improved.

[0028] In one example, the first side portion 11 and the second side portion 12 can be plate-shaped structures, and the first side portion 11 and the second side portion 12 can be made of metal materials with excellent thermal conductivity. For example, the first side portion 11 and the second side portion 12 can be formed by an integrated stamping process. Thus, the first side portion 11 and the second side portion 12 are matched in shape, and the liquid cooling channel 101 is formed inside after welding, and the sealing of the liquid cooling channel 101 can be ensured.

[0029] In an optional utility model, the first side portion 11 and the second side portion 12 are respectively made of aluminum alloy material.

[0030] In the embodiment of the utility model, the first side portion 11 can be made of aluminum alloy material, and the second side portion 12 can also be made of aluminum alloy material. The side panel 1 made of aluminum alloy material has the advantages of good thermal conductivity and light weight, and can further optimize the product performance of the side panel assembly.

[0031] In an optional utility model, the thermal conductivity corresponding to the first side portion 11 and the second side portion 12 is greater than or equal to 235 W / (m·K).

[0032] In the embodiment of the utility model, in order to improve the heat transfer efficiency of the battery core 2, the aluminum alloy material of the first side portion 11 and the second side portion 12 has a corresponding thermal conductivity greater than or equal to 235W / (m·K). The thermal conductivity refers to the heat transferred through an area of ​​1 square meter in 1 second under stable heat transfer conditions when the temperature difference between the two sides of a 1 meter thick material is 1 degree (K, ℃), and the unit is watt / meter·degree (also written as W / (m·K)).

[0033] For example, a 3-series aluminum plate (also referred to as an aluminum-manganese alloy aluminum plate) may be selected and stamped to form the first side portion 11 and the second side portion 12 .

[0034] An optional utility model, referring to Figure 1 and Figure 2 As shown, a portion of the second side portion 12 is concavely disposed toward the first side portion 11 to form at least one reinforcement groove 121 .

[0035] In the embodiment of the utility model, a portion of the second side portion 12 is concavely arranged toward the first side portion 11, forming at least one reinforcement groove 121. Therefore, the groove wall of the reinforcement groove 121 can increase the structural strength of the second side portion 12, thereby improving the overall structural strength of the side plate 1, and can better support the battery cell 2. Those skilled in the art can determine the number of the reinforcement grooves 121 according to actual design requirements. For example, the reinforcement grooves 121 can be 1, 3, 5, 8, 11, etc., and no excessive restrictions are made here.

[0036] The end surface of the second side portion 12 facing the first side portion 11 may also be provided with a channel groove, and correspondingly, the first side portion 11 may be a flat plate structure, so that when the second side portion 12 is welded to the first side portion 11, the channel groove cooperates with the first side portion 11 to form the liquid cooling channel 101. Thus, the liquid cooling contact area between the liquid cooling channel 101 and the battery cell 2 can be ensured, and the heat transfer efficiency of the battery cell 2 can be improved.

[0037] An optional utility model, referring to Figure 1 and Figure 2 As shown, the upper and lower ends of the first side portion 11 are respectively provided with folded edges 13 , and the two folded edges 13 cooperate to form a clamping connection with the battery core 2 .

[0038] In the embodiment of the utility model, the folded edge 13 and the first side portion 11 can be an integrated structure, and the two folded edges 13 are respectively located at the upper and lower ends of the first side portion 11, so that the battery cell 2 can be clamped through the space formed between the two folded edges 13. In other words, the folded edge 13 located at the upper end forms a surface contact with the upper end surface of the battery cell 2, and the folded edge 13 located at the lower end forms a surface contact with the lower end surface of the battery cell 2. For example, the cross-sectional shape of the first side portion 11 can be U-shaped, so that the side panel assembly can be limited to the battery cell 2, so as to support, fix and protect the battery cell 2 on three sides.

[0039] An optional utility model, referring to Figure 2 As shown, the side panel assembly further includes a front end panel 3 and a rear end panel 4, wherein the two side panels 1, the front end panel 3 and the rear end panel 4 cooperate to form a receiving cavity for installing the battery cell 2.

[0040] In the embodiment of the utility model, the front end plate 3 and the rear end plate 4 are respectively located on both sides of the two side plates 1, so that the side plates 1, the front end plate 3 and the rear end plate 4 cooperate to form a accommodating cavity for fixing the battery cell 2, wherein one end of the side plate 1 can be welded and fixed to the front end plate 3, and the other end can be welded and fixed to the rear end plate 4. In this way, the connection stability between the side plate 1 and the front end plate 3 and the rear end plate 4 can be improved, and the overall structural strength of the battery module can be improved. In other embodiments, the side plate 1 and the front end plate 3 can also be fixed by means of threaded connection or the like; the side plate 1 and the rear end plate 4 can also be fixed by means of threaded connection or the like, which are not excessively limited here.

[0041] In summary, the embodiment of the utility model discloses a battery module side panel assembly, the side panel assembly may include two side panels 1, at least one side panel 1 includes a first side portion 11 and a second side portion 12, wherein the first side portion 11 is in surface contact with the battery cell 2, the first side portion 11 and the second side portion 12 are welded to form a liquid cooling channel 101, and the liquid cooling channel 101 is connected to the liquid circuit of the battery liquid cooling system. The liquid cooling plate and the side panel 1 are integrated, and the heat transfer path of the battery cell 2 is directly changed from the battery cell 2 to the side panel 1, thereby reducing the difficulty of assembling the battery module. In addition, by welding the first side portion 11 and the second side portion 12 to form the liquid cooling channel 101, the liquid cooling contact area with the battery cell 2 can be ensured, and the heat transfer efficiency of the battery cell 2 is comprehensively improved.

[0042] Reference Figure 2As shown, an embodiment of the utility model further provides a battery module, which includes a battery module side panel assembly as described in any one of the above utility models and at least one battery cell 2, wherein the first side portion 11 is in surface contact with the battery cell 2, and a thermal conductive adhesive layer is arranged between the first side portion 11 and the battery cell 2.

[0043] In the embodiment of the utility model, the battery module integrates the liquid cooling plate and the side plate 1, and the heat transfer path of the battery cell 2 is directly changed from the battery cell 2 to the side plate 1, thereby reducing the difficulty of assembling the battery module. The number of parts of the battery module is reduced, and the assembly space required for the battery module is reduced. In addition, the liquid cooling channel 101 is formed by welding the first side portion 11 and the second side portion 12, which can ensure the liquid cooling contact area with the battery cell 2, and comprehensively improve the heat transfer efficiency of the battery cell 2.

[0044] Furthermore, the thermally conductive adhesive layer can be used to fill the surface contact gap between the first side portion 11 and the battery core 2, so as to avoid the presence of a gap between the first side portion 11 and the battery core 2 when the surface contact is formed, thereby affecting the efficiency of heat transfer from the battery core 2 to the first side portion 11. After the thermally conductive adhesive layer is provided, its thermal conductivity is greater than the thermal conductivity of the air in the gap, thereby improving the heat transfer efficiency of the battery core 2.

[0045] An optional utility model, referring to Figure 2 As shown, in the case where both of the two side plates 1 include a first side portion 11 and a second side portion 12 , the battery module further includes a hose 5 , wherein the liquid cooling channels 101 on the two side plates 1 are connected by a liquid path through the hose 5 .

[0046] In the embodiment of the utility model, when both the side panels 1 include the first side portion 11 and the second side portion 12, that is, when both the side panels 1 are provided with the liquid cooling channel 101, the battery module may further include a hose 5, and the hose 5 is used to connect the liquid cooling channels 101 on the two side panels 1. In some embodiments, the hose 5 may be made of polylaurolactam material.

[0047] When the battery liquid cooling system is working, the coolant of the battery liquid cooling system flows into the liquid cooling channel 101 of one side plate 1, flows into the liquid cooling channel 101 of the other side plate 1 through the hose 5, and finally flows out of the liquid cooling channel 101 of the other side plate 1, thereby realizing the water circulation of the coolant, thereby cooling the battery cell 2.

[0048] An optional utility model, referring to Figure 2As shown, the liquid outlet and the liquid inlet of the liquid cooling channel 101 of the side plate 1 are respectively provided with fixed joints 6, and the two ends of the hose 5 are respectively provided with quick-change joints 7, and the fixed joints 6 are buckled and connected with the quick-change joints 7.

[0049] In the embodiment of the utility model, the liquid outlet and the liquid inlet of the liquid cooling channel 101 are respectively provided with a fixed joint 6, and the fixed joint 6 is used to connect other pipes, and it can be welded and fixed to the side plate 1. In one example, the fixed joint 6 can be made of aluminum alloy material. Preferably, the thermal conductivity of the aluminum alloy material used in the fixed joint 6 is greater than or equal to 235W / (m·K).

[0050] The two ends of the hose 5 may be provided with quick-change connectors 7 respectively, so that when the hose 5 is assembled, the quick-change connectors 7 can be buckled onto the fixed connectors 6, thereby improving the assembly efficiency of the battery module.

[0051] In other embodiments, both ends of the hose 5 may also be provided with flange joints, and correspondingly, the liquid outlet and the liquid inlet of the liquid cooling channel 101 are respectively provided with flange joints, so that threaded connection can be performed through the flange joints.

[0052] The present utility model embodiment further provides a battery pack, which may include a battery module as described in any one of the utility model embodiments described above.

[0053] In summary, the utility model discloses a battery module side panel assembly, a battery module and a battery pack. The utility model includes two side panels 1, at least one side panel 1 includes a first side portion 11 and a second side portion 12, wherein the first side portion 11 is in surface contact with the battery cell 2, the first side portion 11 and the second side portion 12 are welded to form a liquid cooling channel 101, and the liquid cooling channel 101 is connected to the liquid circuit of the battery liquid cooling system. The liquid cooling plate and the side panel 1 are integrated, and the heat transfer path of the battery cell 2 is directly changed from the battery cell 2 to the side panel 1, thereby reducing the difficulty of assembling the battery module. In addition, by welding the first side portion 11 and the second side portion 12 to form the liquid cooling channel 101, the liquid cooling contact area with the battery cell 2 can be ensured, and the heat transfer efficiency of the battery cell 2 is comprehensively improved.

[0054] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0055] It is easy for a person skilled in the art to think that any combination of the above embodiments is feasible, so any combination of the above embodiments is an implementation scheme of the present utility model. However, due to space limitations, this specification will not describe them in detail here.

[0056] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0057] Similarly, it should be understood that in order to simplify the present invention and help understand one or more of the various aspects of the present invention, in the above description of exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof.

[0058] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

Claims

1. A battery module side panel assembly, It is characterized in that The side plate assembly comprises two side plates (1), at least one side plate (1) comprises a first side portion (11) and a second side portion (12), wherein the first side portion (11) is in surface contact with the battery cell (2), the first side portion (11) and the second side portion (12) are welded to form a liquid cooling channel (101), and the liquid cooling channel (101) is in liquid communication with a battery liquid cooling system.

2. The battery module side panel assembly according to claim 1, It is characterized in that The first side portion (11) and the second side portion (12) are respectively made of aluminum alloy material.

3. The battery module side panel assembly according to claim 2, It is characterized in that The thermal conductivity corresponding to the first side portion (11) and the second side portion (12) is greater than or equal to 235 W / (m·K).

4. The battery module side panel assembly according to claim 1, It is characterized in that A portion of the second side portion (12) is arranged inwardly concavely toward the first side portion (11), forming at least one reinforcement groove (121).

5. The battery module side panel assembly according to claim 1, It is characterized in that The upper and lower ends of the first side portion (11) are respectively provided with folded edges (13), and the two folded edges (13) cooperate to form a clamping connection with the battery core (2).

6. The battery module side panel assembly according to claim 1, It is characterized in that The side panel assembly also includes a front end panel (3) and a rear end panel (4), wherein the two side panels (1), the front end panel (3) and the rear end panel (4) cooperate to form a receiving cavity for installing the battery cell (2).

7. A battery module, It is characterized in that The battery module comprises a battery module side panel assembly as described in any one of claims 1 to 6 and at least one battery cell (2), wherein the first side portion (11) is in surface contact with the battery cell (2), and a thermally conductive adhesive layer is provided between the first side portion (11) and the battery cell (2).

8. The battery module according to claim 7, It is characterized in that When both of the side plates (1) include a first side portion (11) and a second side portion (12), the battery module further includes a hose (5), wherein the liquid cooling channels (101) on the two side plates (1) are connected by a liquid path through the hose (5).

9. The battery module according to claim 8, It is characterized in that The liquid outlet and the liquid inlet of the liquid cooling channel (101) of the side plate (1) are respectively provided with fixed joints (6), and both ends of the hose (5) are respectively provided with quick-change joints (7), and the fixed joints (6) are connected to the quick-change joints (7) by buckling.

10. A battery pack, It is characterized in that The battery pack comprises a battery module as described in any one of claims 7 to 9.

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