CN217426940U - Battery modules and battery packs - Google Patents

Abstract

The application provides a battery module and a battery pack, and relates to the field of batteries. The battery module includes a plurality of cell assemblies and a heat shield, the plurality of cell assemblies are arranged at intervals along the first direction, and a plurality of cell assemblies is formed between any two adjacent cell assemblies in the plurality of cell assemblies. an installation space, the heat shield is arranged in the installation space, the highest position of the heat shield in the second direction is higher than the highest position of the cell assembly in the second direction, the first The direction intersects the second direction. The highest position of the heat shield of the battery module of the present application in the second direction is higher than the highest position of the cell assembly in the second direction, so that the heat shield can conduct heat generated in the cell assembly to prevent The heat is diffused into other cell components, which solves the problem of thermal runaway of one row of batteries in the existing battery module, which in turn leads to the thermal runaway of other row cells of the battery module, and ensures the safe operation of the battery module. .

Description

Battery modules and battery packs

technical field

The present application relates to the field of batteries, and in particular, to a battery module and a battery pack.

Background technique

With the development of the new energy industry, the application of electric vehicles is becoming more and more extensive. As an important part of electric vehicles, battery packs are extremely important for the safety of electric vehicles. The battery pack includes a battery module, and the existing battery module is generally composed of multiple rows of cells stacked side by side, and an end plate, a side plate and an upper cover are provided outside the stacked cells. When a row of cells in the battery module is thermally out of control, the heat generated by the cells and a large amount of high-temperature gas are difficult to be released in the relatively closed space formed by the end plate, the side plate and the upper cover, so that the cells in the Thermal runaway occurs in other battery cells in the space, which affects the operation safety of the battery module.

Utility model content

In view of this, the present application provides a battery module and a battery pack, wherein the highest position of the heat shield in the second direction is higher than the highest position of the cell assembly in the second direction, so that the heat shield can prevent the cell assembly The heat generated in the battery is diverted to prevent the heat from spreading to other cell components, which solves the problem of thermal runaway in one row of batteries in the existing battery module, which in turn leads to thermal runaway in other rows of the battery module. problem, to ensure the safe operation of the battery module.

According to an aspect of the present application, a battery module is provided, the battery module includes a plurality of cell assemblies and a heat shield, the plurality of cell assemblies are spaced apart along a first direction, and the plurality of cell assemblies An installation space is formed between any two adjacent cell assemblies, the heat insulation plate is arranged in the installation space, and the highest position of the heat insulation plate in the second direction is higher than where the cell assembly is located. The highest position in the second direction, the first direction and the second direction intersect.

Preferably, any one of the plurality of cell assemblies includes a predetermined number of cells, and the predetermined number of the cells is arranged along a third direction, the third direction being the same as the first The direction is vertical, the predetermined number of the battery cells are divided into multiple groups, and the heat insulating plate is arranged between any adjacent two groups in the multiple groups.

Preferably, the thickness of the heat insulation board is 0.5mm-10mm.

Preferably, the battery module further includes a plurality of cover plates corresponding to the plurality of cell assemblies one-to-one, and the plurality of cover plates are respectively covered on the plurality of cell assemblies.

Preferably, the battery module further includes a cover plate, and each group of the plurality of groups is covered with the cover plate.

Preferably, the heat insulating plate protrudes from the cover plate, and the distance between the heat insulating plate and the cover plate is 0-20 mm.

Preferably, the tensile strength of the thermal insulation board is greater than or equal to 20Mpa, the flexural strength of the thermal insulation board is greater than or equal to 30Mpa, and the flexural modulus of the thermal insulation board is greater than or equal to 100Mpa.

Preferably, the battery module further includes a bus bar support, the bus bar support is connected to the battery core assembly, the bus bar support includes a connecting piece and a main body, the connecting piece is opposite to the main body along the first Protruding in two directions, the cover plate includes a connecting hole, and the connecting piece is clamped in the connecting hole.

Preferably, the battery module further includes two side plates, two end plates and a cable tie, the two side plates are disposed at both ends of the plurality of battery core assemblies in the first direction, and the two Each of the end plates is disposed at both ends of the plurality of cell assemblies in the third direction, and the tie wraps around the outside of both the side plates and the end plates.

According to another aspect of the present application, a battery pack is provided, and the battery pack includes the above-mentioned battery module.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following drawings will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 shows a schematic three-dimensional structure diagram of a battery module according to an embodiment of the present application;

FIG. 2 shows an exploded view of a battery module according to an embodiment of the present application;

FIG. 3 shows a schematic cross-sectional structure diagram of a battery module cut along a second direction perpendicular to an embodiment of the present application;

FIG. 4 shows a schematic plan view of a battery module according to another embodiment of the present application.

Icon: 100-cell assembly; 110-cell; 200-insulation plate; 300-cover plate; 310-connection hole; 410-busbar bracket; 420-end plate; 430-side plate; L1-first direction; L2-second direction; L3-third direction.

Detailed ways

The following detailed description is provided to assist the reader in gaining a comprehensive understanding of the methods, apparatus and/or systems described herein. However, various changes, modifications and equivalents of the methods, apparatus and/or systems described herein will be apparent after understanding the disclosure of the present application. For example, the order of operations described herein is merely an example and is not limited to the order set forth herein, but rather than operations that must occur in a particular order, may be made that will become apparent upon understanding the disclosure of the present application change. Also, descriptions of features known in the art may be omitted for increased clarity and conciseness.

The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and/or systems described herein that will be apparent after an understanding of the disclosure of the present application.

Throughout the specification, when an element such as a layer, region, or substrate is described as being "on", "connected to," "coupled to," "on" another element When an element is "on" or "covering" another element, it can be directly "on" the other element, "connected to" the other element, "coupled to" the other element, "on" the other element "over" or "overlies" another element, or one or more other elements may be present therebetween. In contrast, when an element is described as being "directly on", "directly connected to," "directly coupled to," "directly on" another element Or "directly covering" another element, there may be no intervening elements.

As used herein, the term "and/or" includes any and any combination of any two or more of the associated listed items.

Although terms such as "first," "second," and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections are not subject to these terms restricted. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, reference to a first element, component, region, layer or section in the examples described herein could be termed a second element, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatially relative terms such as "above", "upper", "under", and "lower" may be used herein to describe one element as shown in the figures to another element relationship. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as being "on" or "upper" relative to another element would then be oriented "below" or "lower" relative to the other element. Thus, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be otherwise oriented (eg, rotated 90 degrees or at other orientations) and the spatially relative terms used herein interpreted accordingly.

The terminology used herein is used to describe various examples only, and not to limit the present disclosure. Singular forms are intended to include plural forms as well, unless the context clearly dictates otherwise. The terms "comprising", "comprising" and "having" enumerate the presence of stated features, quantities, operations, components, elements and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements and/or combinations thereof.

Variations from the shapes shown in the figures may occur due to manufacturing techniques and/or tolerances. Thus, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacture.

The features of the examples described herein may be combined in various ways that will be apparent after an understanding of the disclosure of this application. Furthermore, while the examples described herein have a wide variety of configurations, other configurations are possible, as will be apparent upon understanding the disclosure of this application.

According to an aspect of the present application, a battery module is provided, the battery module includes a plurality of cell assemblies and a heat shield, the plurality of cell assemblies are spaced apart along a first direction, and the plurality of cell assemblies An installation space is formed between any two adjacent cell assemblies, the heat insulation plate is arranged in the installation space, and the highest position of the heat insulation plate in the second direction is higher than where the cell assembly is located. The highest position in the second direction, the first direction and the second direction intersect. The highest position of the heat insulation plate of the battery module of the present application in the second direction is higher than the highest position of the cell assembly in the second direction, so that the heat insulation plate can divert the heat generated in the cell assembly, so as to Prevents heat from spreading to other battery components, solves the problem of thermal runaway in one row of batteries in the existing battery module, which in turn leads to thermal runaway in other rows of the battery module, ensuring the safety of the battery module run.

In an embodiment of the present application, as shown in FIG. 1 to FIG. 3 , the first direction L1 , the second direction L2 and the third direction L3 are perpendicular to each other. A cover plate 300 is disposed above the cell assemblies 100 , and the cover plates 300 are in one-to-one correspondence with the cell assemblies 100 , that is, the number of the cell assemblies 100 is the same as the number of the cover plates 300 , and each cell assembly 100 is provided with a cover board 300. Specifically, a bus bar bracket 410 is provided above the cell assembly 100 . The bus bar bracket 410 includes a main body and a connecting piece. The connecting piece protrudes from the main body along the second direction L2 , and the cover plate 300 is disposed above the bus bar bracket 410 . , the cover plate 300 includes a connecting hole 310, and the connecting piece is used to cooperate with the connecting hole 310 to realize the connection between the cover plate 300 and the bus bar bracket 410, and the connecting piece can be formed as a snap structure. Specifically, the connecting piece is a plastic material The upper end of the connecting piece may include a plurality of parts spaced apart along the circumferential direction of the connecting hole 310. When the cover plate 300 is installed on the bus bar bracket 410, the distance between two adjacent parts of the plurality of parts decreases. It is small, so that the multiple parts of the upper end of the connecting piece protrude into the connecting hole 310 , and then the distance between the multiple parts is restored, so that the connecting piece is clamped in the connecting hole 310 . Compared with the number of cover plates of the battery module in the prior art, the number of the cover plates 300 in this embodiment is the same as the number of the cell components 100 , which can facilitate the removal of high-temperature gas and further avoid one cell When the battery cells 110 in the assembly 100 experience thermal runaway, the impact on other battery cells improves the reliability of the battery module. At the same time, the number of cover plates 300 in the present embodiment is the same as that of the cell assembly 100 , so that each cover plate 300 can be designed separately, which reduces the manufacturing cost and the mold cost. In this embodiment, the number of cell assemblies 100 may be 2, 3 or 5.

In another embodiment of the present application, any cell assembly 100 includes a predetermined number of cells 110, and the predetermined number of cells 110 are arranged along the third direction L3. As shown in FIG. 4 , the predetermined number of cells 110 are arranged in the third direction L3. The 110 can be divided into multiple groups, the installation space formed between the adjacent cell assemblies 100 is provided with a heat insulation board 200, and the heat insulation board 200 is also provided between two adjacent groups of the multiple groups. In this way, the cells 110 in the battery module are further separated, which further reduces the influence of one cell on other cells when thermal runaway occurs. When the heat insulating plate 200 is also disposed between two adjacent two groups among the multiple groups, a cover plate 300 is disposed above each group. In this way, when the cells in one group are thermally out of control, other groups in the cell assembly 100 and other cell assemblies 100 will not be affected, thereby further improving the reliability of the module. In this embodiment, the predetermined number of battery cells 110 may be divided into 2 groups, 3 groups or 4 groups.

It should be noted that the above-mentioned predetermined number is not the specific number of cells in the cell assembly 100 , and the number of cells in the cell assembly 100 can be selected according to usage requirements.

Further, the protruding distance of the heat insulating plate 200 relative to the cover plate 300 is 0 mm-20 mm. For example, the protruding distance of the heat insulating plate 200 relative to the cover plate 300 may be 3 mm, 5 mm, 7 mm, 10 mm, 12 mm, 15 mm or 20 mm. Specifically, the thermal insulation board 200 may include a protruding plane (the upper plane of the thermal insulation board 200 ) perpendicular to the second direction L2, and the protruding plane protrudes from the cover plate 300 in the second direction L2, that is, the thermal insulation board The height of 200 is higher than the upper surface of the cover plate 300, and at this time, the protruding plane is also higher than the upper surface of the cell, so that the high-temperature gas generated by a cell assembly 100 can be diverted to prevent the high-temperature gas from being discharged into the phase. In the adjacent cell components, it can effectively prevent thermal runaway at the module level and improve the reliability of the module.

Further, the thickness of the heat insulation board 200 is 0.5mm-10mm, for example, the thickness of the heat insulation board 200 may be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm or 9mm.

Preferably, the tensile strength of the thermal insulation board 200 is greater than or equal to 20Mpa, the flexural strength of the thermal insulation board 200 is greater than or equal to 30Mpa, and the flexural modulus of the thermal insulation board is greater than or equal to 100Mpa. In this way, the rigidity and mode of the battery module can be improved by arranging the heat shield 200 , and then the rigidity and mode of the battery pack including the battery module of the present application can be improved.

In the embodiment of the present application, the thermal insulation board 200 may be an epoxy board.

In the battery module, preventing the thermal runaway of the battery module and effective dredging after the occurrence of thermal runaway is an important means to ensure the safety of the battery module. When the thermal runaway occurs in the battery cells of the 1, it prevents the heat from being transferred to the adjacent cell components, and at the same time, the heat insulation plate can divert the high-temperature air generated by the battery components, so that the thermal runaway at the module level can be effectively reduced.

As shown in FIG. 1 and FIG. 2 , the battery module further includes two side plates 430 , two end plates 420 and a tie 440 , and the two side plates 430 are disposed on the plurality of cell assemblies 100 in the first direction L1 At both ends, the two end plates 420 are disposed at both ends of the plurality of cell assemblies 100 in the third direction L3, and the cable ties 440 are wrapped around the outside of both the side plates 430 and the end plates 420. Fixation between core assemblies 100 .

According to another aspect of the present application, a battery pack is provided, which includes the above-mentioned battery module.

According to the battery module of the present application, the highest position of the heat shield in the second direction is higher than the highest position of the cell assembly in the second direction, so that the heat shield can divert the heat generated in the cell assembly, In order to prevent the heat from spreading to other cell components, it solves the problem of thermal runaway of one row of batteries in the existing battery module, which in turn leads to the thermal runaway of other row cells of the battery module. safe operation.

According to the battery pack provided by the present application, the battery pack includes a battery module, and the battery pack has the same technical effect as the above-mentioned battery module, which will not be repeated here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application. scope.

Claims (10)

1. A battery module, characterized in that the battery module comprises a plurality of cell assemblies and a heat shield, the plurality of cell assemblies are arranged at intervals along a first direction, and among the plurality of cell assemblies An installation space is formed between any two adjacent cell assemblies, and the heat insulation plate is arranged in the installation space, The highest position of the heat shield in the second direction is higher than the highest position of the cell assembly in the second direction, and the first direction intersects the second direction. 2 . The battery module according to claim 1 , wherein any one of the plurality of cell assemblies comprises a predetermined number of cells, and the predetermined number of the cells is along a third direction. 3 . arranged, the third direction is perpendicular to the first direction, The predetermined number of the battery cells are divided into multiple groups, and the heat insulating plate is disposed between any adjacent two groups in the multiple groups. 3 . The battery module according to claim 1 , wherein the thickness of the heat insulating plate is 0.5 mm-10 mm. 4 . 4 . The battery module according to claim 1 , wherein the battery module further comprises a plurality of cover plates corresponding to the plurality of cell assemblies one-to-one, and the plurality of cover plates are respectively covered with on the plurality of cell assemblies. 5 . The battery module according to claim 2 , wherein the battery module further comprises a cover plate, and each group of the plurality of groups is covered with the cover plate. 6 . 6 . The battery module according to claim 4 , wherein the heat insulating plate protrudes from the cover plate, and the distance between the heat insulating plate and the cover plate is 0-20 mm. 7 . . 7 . The battery module according to claim 1 , wherein the tensile strength of the heat shield is greater than or equal to 20Mpa, the bending strength of the heat shield is greater than or equal to 30Mpa, and the The flexural modulus is greater than or equal to 100Mpa. 8 . The battery module according to claim 6 , wherein the battery module further comprises a busbar support, the busbar support is connected to the battery core assembly, and the busbar support comprises a connector and a The main body, the connecting piece protrudes in the second direction relative to the main body, the cover plate includes a connecting hole, and the connecting piece is clamped in the connecting hole. 9 . The battery module according to claim 2 , wherein the battery module further comprises two side plates, two end plates and a cable tie, and the two side plates are arranged on the plurality of battery packs. 10 . The two ends of the core assembly in the first direction, the two end plates are arranged at the two ends of the plurality of cell assemblies in the third direction, and the cable ties surround the side plates and the end plates. outside of both end plates. 10. A battery pack, wherein the battery pack comprises the battery module according to any one of claims 1-9.

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