Soft package battery shell, battery unit and battery module

Abstract

The utility model provides a soft package battery shell, a battery unit and a battery module, the soft package battery shell comprises a bearing plate, and the bearing plate is provided with two first side edges and two second side edges; the first side edge and the two second side edges are respectively connected with positioning folding edges; the bearing plate and the three positioning folded edges jointly form a semi-open cavity for accommodating the soft package battery, and the semi-open cavity is provided with an opening; a blocking structure is arranged on the first side edge without the positioning folding edge, a leading-out opening communicated with the semi-open cavity is formed in the area, without the blocking structure, of the first side edge, and the leading-out opening can be used for leading out a tab of the soft package battery; the blocking structure can block a part of a gas circulation path of the semi-open cavity towards one side of the leading-out opening; the positioning folding edge is connected with an assembling folding edge, and the soft package battery shell can be connected to another soft package battery shell through the assembling folding edge.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and in particular to a soft-pack battery casing, battery cell, and battery module. Background Technology

[0002] Existing designs for pouch cell units employ a box-type containment structure to house the pouch cells. This means that, except for an opening on one side for the pouch cell's tabs to extend, the containment box is a complete rectangular shell structure, including two front panels and three side panels connecting the edges of the two front panels. These front panels also serve as the stacking surface for multiple battery cells. Based on this design, when a pouch cell experiences thermal runaway, the high-temperature flammable gas generated by the runaway battery flows along the bottom and side seals and eventually exits through the tab openings of the containment box. This can lead to tab insulation failure or residue buildup, causing a short circuit within the module. Sparks from tab insulation failure can ignite the flammable gas, or the high-temperature gas can flow into adjacent containment boxes through the tab openings of adjacent battery cells, triggering thermal runaway within those adjacent pouch cells, leading to the spread of thermal runaway and fire within the module. Furthermore, the containment box structure used in the above design is complex and occupies a large amount of space, resulting in high costs and making it difficult to meet lightweight design requirements, thus hindering energy density improvements. Utility Model Content

[0003] A primary objective of this disclosure is to overcome at least one of the deficiencies of the prior art described above, and to provide a pouch battery housing capable of effectively blocking the airflow released by the pouch battery.

[0004] To achieve the above objectives, the present disclosure adopts the following technical solution:

[0005] According to one aspect of this disclosure, a pouch battery housing is provided, wherein: the pouch battery housing includes a support plate, the support plate being rectangular, the support plate having two first sides and two second sides, the first sides extending along a first direction, the two first sides being spaced apart along a second direction perpendicular to the first direction, the second sides extending along the second direction, and the two second sides being spaced apart along the first direction; one of the first sides and the two second sides are respectively connected to a positioning flange extending toward the same side in a third direction, the third direction being perpendicular to both the first and second directions; the support plate and The three positioning flanges together form a semi-open cavity for accommodating a pouch battery, the semi-open cavity having an assembly opening facing the third direction; wherein, the first side without the positioning flange is provided with a barrier structure, and the area of ​​the first side without the barrier structure forms an outlet opening communicating with the semi-open cavity, the outlet opening allowing the tab of the pouch battery to be led out; the barrier structure can block part of the gas flow path from the semi-open cavity to the outlet opening side; wherein, the positioning flange is connected to an assembly flange, and the pouch battery housing can be connected to another pouch battery housing via the assembly flange.

[0006] According to one embodiment of this disclosure, the barrier structure includes a barrier plate connected to a first side that is not connected to the positioning fold, the barrier plate being connected to the positioning fold connected to a second side, the barrier plate and the positioning fold extending in the same direction in the third direction and having the same width in the third direction.

[0007] According to one embodiment of this disclosure, the first side edge that is not connected to the positioning fold is connected to the two ends of the barrier plate in the first direction, and the two barrier plates are respectively connected to the two positioning folds.

[0008] According to one embodiment of this disclosure, the positioning folds connected to the two second side edges are respectively connected to the assembly folds; or, the three positioning folds are respectively connected to the assembly folds.

[0009] According to one embodiment of this disclosure, the assembly fold has an "L"-shaped cross-section, one end of the assembly fold is connected to the positioning fold, and the other end is used to connect to the outer surface of the positioning fold of another soft-pack battery housing; or, the assembly fold is parallel to the support plate, and the assembly fold is used to connect to the support plate of another soft-pack battery housing.

[0010] According to one embodiment of this disclosure, the positioning fold connected to the first side is provided with a vent, and the vent extends through the positioning fold along the second direction.

[0011] According to one embodiment of this disclosure, the first side with the positioning fold is provided with the vent at both ends in the first direction.

[0012] According to one embodiment of this disclosure, the pouch battery housing further includes a buffer layer disposed on the inner surface of the support plate; wherein, when the pouch battery is housed in the semi-open cavity, the pouch battery is disposed on the buffer layer on the third-side surface.

[0013] Another primary objective of this disclosure is to overcome at least one of the deficiencies of the prior art described above and to provide a battery cell employing the aforementioned pouch battery casing.

[0014] To achieve the above objectives, the present disclosure adopts the following technical solution:

[0015] According to another aspect of this disclosure, a battery cell is provided, comprising a pouch battery and a pouch battery housing as proposed in this disclosure and described in the above embodiments, wherein the pouch battery is housed in a semi-open cavity of the pouch battery housing, and the tabs of the pouch battery are led out from the lead-out opening of the pouch battery housing.

[0016] Another major objective of this disclosure is to overcome at least one of the defects of the prior art described above and to provide a battery module employing the aforementioned battery cells.

[0017] To achieve the above objectives, the present disclosure adopts the following technical solution:

[0018] According to another aspect of this disclosure, a battery module is provided, comprising a plurality of battery cells as proposed in this disclosure and described in the above embodiments, the plurality of battery cells being stacked; wherein, in two adjacent battery cells, one is abutted to the carrier plate of the other via the mounting opening and connected to the other via the mounting flange.

[0019] As can be seen from the above technical solutions, the advantages and positive effects of the soft-pack battery casing, battery cell, and battery module proposed in this disclosure are as follows:

[0020] The pouch battery casing disclosed herein includes a support plate having two first sides and two second sides; one first side and two second sides are respectively connected to positioning flanges; the support plate and the three positioning flanges together form a semi-open cavity for accommodating the pouch battery, and the semi-open cavity has an assembly opening; the first side without positioning flanges is provided with a barrier structure, and the area of ​​the first side without the barrier structure forms an outlet opening communicating with the semi-open cavity, the outlet opening allowing the tabs of the pouch battery to be led out; the barrier structure can block part of the gas flow path from the semi-open cavity to the outlet opening side; the positioning flanges are connected to assembly flanges, and the pouch battery casing can be connected to another pouch battery casing via the assembly flanges. Through the above structural design, this disclosure can use the barrier structure to block the gas flow path from the semi-open cavity to the outlet opening side, thereby preventing the high-temperature flammable gas generated when the pouch battery experiences thermal runaway from being discharged through the outlet opening, and preventing insulation failure at the tab end or the accumulation of residual material leading to a short circuit within the module. Furthermore, because the pouch battery casing adopts a semi-open cavity design and utilizes assembly folded edges to connect with adjacent pouch battery casings, it improves the convenience of stacking multiple battery cells into a group using the pouch battery casing proposed in this disclosure, and enhances the connection reliability of adjacent battery cells. In addition, the pouch battery casing proposed in this disclosure includes only one support plate, thereby reducing the space occupied by the pouch battery casing, reducing material costs, meeting the requirements of lightweight design, and helping to improve the energy density after multiple battery cells are stacked into a group. Attached Figure Description

[0021] The various objectives, features, and advantages of this disclosure will become more apparent from the following detailed description of preferred embodiments of the disclosure taken in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the disclosure and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0022] Figure 1 This is a three-dimensional structural schematic diagram of a pouch battery casing according to an exemplary embodiment;

[0023] Figure 2 yes Figure 1 A partial cross-sectional schematic diagram of the pouch battery casing is shown;

[0024] Figure 3 This is a three-dimensional structural schematic diagram of a battery cell according to an exemplary embodiment;

[0025] Figure 4 yes Figure 3 An exploded three-dimensional diagram of the battery cell is shown.

[0026] Figure 5 This is a three-dimensional structural schematic diagram of a battery module according to an exemplary embodiment.

[0027] The following are the descriptions of the reference numerals:

[0028] 100. Soft-pack battery casing;

[0029] 110. Support plate;

[0030] 111. First side;

[0031] 112. Second side;

[0032] 120. Positioning fold;

[0033] 1201. Vent;

[0034] 130. Assemble the folded edge;

[0035] 140. Barrier plate;

[0036] 150. Buffer layer;

[0037] 200. Soft-pack battery;

[0038] 210. Electrode;

[0039] X. First direction;

[0040] Y. Second direction;

[0041] Z. Third-party orientation. Detailed Implementation

[0042] Typical embodiments embodying the features and advantages of this disclosure will be described in detail in the following description. It should be understood that this disclosure can have various variations in different embodiments without departing from the scope of this disclosure, and the descriptions and drawings therein are illustrative in nature and not intended to limit this disclosure.

[0043] In the following description of various exemplary embodiments of this disclosure, reference is made to the accompanying drawings, which form part of this disclosure, and which illustrate by way of example different exemplary structures, systems, and steps that can implement various aspects of this disclosure. It should be understood that other specific embodiments of the components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of this disclosure. Furthermore, while the terms “above,” “between,” “within,” etc., may be used in this specification to describe different exemplary features and elements of this disclosure, these terms are used herein only for convenience, such as the orientation according to the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this disclosure.

[0044] See Figure 1This illustration represents a three-dimensional structural schematic diagram of the pouch battery housing 100 proposed in this disclosure. In this exemplary embodiment, the pouch battery housing 100 proposed in this disclosure is described as an example of its application in an automotive battery device. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this disclosure to other types of battery devices employing the pouch battery 200, and these changes are still within the scope of the principles of the pouch battery housing 100 proposed in this disclosure.

[0045] See also Figure 2 , Figure 2 The accompanying drawings represent a partial cross-sectional view of the pouch battery housing 100 that embodies the principles of this disclosure. The cross-section is, for example, at the connection point between the positioning fold 120 and the assembly fold 130. The specific plane used for the cross-section can be parallel to the second direction Y and perpendicular to the first direction X (i.e., showing the cross-sectional structure at the connection point between the positioning fold 120 and the assembly fold 130 connected to the first side 111), or it can be parallel to the first direction X and perpendicular to the second direction Y (i.e., showing the cross-sectional structure at the connection point between the positioning fold 120 and the assembly fold 130 connected to the second side 112). The structure, connection method, and functional relationship of the main components of the pouch battery housing 100 proposed in this disclosure will be described in detail below with reference to the above drawings.

[0046] like Figure 1As shown, in one embodiment of this disclosure, the pouch battery housing 100 includes a support plate 110, which is rectangular and has two first sides 111 and two second sides 112. The first sides 111 extend along a first direction X, and the two first sides 111 are spaced apart along a second direction Y perpendicular to the first direction X. The second sides 112 extend along the second direction Y, and the two second sides 112 are spaced apart along the first direction X. One of the first sides 111 and the two second sides 112 are respectively connected to positioning flanges 120 extending towards the same side in a third direction Z, which is perpendicular to both the first direction X and the second direction Y. The third direction Z can also be understood as the thickness direction of the support plate 110. Accordingly, the support plate 110 and the three positioning flanges 120 together form a semi-open cavity for accommodating the pouch battery 200, the semi-open cavity having an assembly opening facing the third direction Z. Based on this, a barrier structure is provided on the first side 111 where the positioning flange 120 is not provided, and the area of ​​the first side 111 where the barrier structure is not provided forms an outlet opening communicating with the semi-open cavity. This outlet opening allows the tab 210 of the pouch battery 200 to be led out. The barrier structure can block part of the gas flow path from the semi-open cavity to the outlet opening side. Accordingly, using the barrier structure and the three positioning flanges 120, the pouch battery housing 100 can position the pouch battery 200 it contains. Furthermore, the positioning flange 120 is connected to an assembly flange 130. For example, the assembly flange 130 can be connected to the end of the positioning flange 120 in the third direction Z away from the support plate 110. Accordingly, the pouch battery housing 100 can be connected to another pouch battery housing 100 via the assembly flange 130. Through the above structural design, this disclosure can block the gas flow path from the semi-open cavity to the lead-out opening side using a barrier structure, thereby preventing the high-temperature flammable gas generated when the pouch battery 200 experiences thermal runaway from being discharged through the lead-out opening, and preventing insulation failure at the tab 210 end or the accumulation of residual material that could lead to a short circuit within the module. Furthermore, the support plate 110, positioning folded edge 120, and assembly folded edge 130 can accelerate heat conduction when the pouch battery 200 experiences thermal runaway, reducing the risk of thermal runaway propagation from adjacent pouch batteries 200. During normal use, the fit and heat conduction between the assembly folded edge 130 and the adjacent pouch battery housing 100 can achieve temperature balance within the module, which also helps improve the battery's cycle life. Moreover, since the pouch battery housing 100 adopts a semi-open cavity design and is connected to adjacent pouch battery housings 100 using the assembly folded edge 130, the convenience of stacking multiple battery cells using the pouch battery housing 100 proposed in this disclosure is improved, and the connection reliability of adjacent battery cells is enhanced.Furthermore, the pouch battery housing 100 disclosed herein includes only one support plate 110, which reduces the space occupied by the pouch battery housing 100, lowers material costs, meets the requirements of lightweight design, and is conducive to improving the energy density of multiple battery cells stacked together.

[0047] like Figure 1 As shown, in one embodiment of this disclosure, the barrier structure may include a barrier plate 140. The barrier plate 140 is connected to a first side 111 that is not connected to the positioning folded edge 120, and the barrier plate 140 is connected to the positioning folded edge 120 connected to a second side 112. The barrier plate 140 and the positioning folded edge 120 extend in the same direction in the third direction Z and have the same width in the third direction Z. Through the above structural design, this disclosure utilizes the barrier plate 140 to block the gas flow path from the semi-open cavity to the outlet opening side. In some embodiments, the barrier structure may also adopt other structural designs, such as, but not limited to, being provided on a rib or folded edge, and the barrier structure may only be connected to the support plate 110 and have no connection relationship with the positioning folded edge 120, or it may only be connected to the positioning folded edge 120 and have no connection relationship with the support plate 110, and neither is limited to this embodiment.

[0048] like Figure 1 As shown, based on the structural design of the barrier structure including the barrier plate 140, in one embodiment of this disclosure, the two ends of the first side 111 not connected to the positioning fold 120 in the first direction X can be respectively connected to the barrier plate 140, and these two barrier plates 140 are respectively connected to the two positioning folds 120 (i.e., the two positioning folds 120 each of the two second sides 112 are connected to). Through the above structural design, since the tabs 210 of part of the soft-pack battery 200 are located in its central region in the first direction X, for example... Figure 3 As shown, this disclosure utilizes two barrier plates 140 respectively arranged on both sides of the lead-out opening to block the gas flow path on both sides of the tab 210, further preventing the high-temperature flammable gas generated when the pouch battery 200 experiences thermal runaway from being discharged through the lead-out opening, and further preventing insulation failure at the tab 210 end or the accumulation of residual material leading to a short circuit within the module. In some embodiments, depending on different design needs, or to accommodate different tab 210 structures of the pouch battery 200, the barrier plate 140 may be only one, i.e., connected to one end of the first side 111 in the first direction X, and is not limited to this embodiment.

[0049] like Figure 1As shown, in one embodiment of this disclosure, the three positioning folds 120 can be respectively connected to the assembly folds 130. Accordingly, when multiple battery cells of a battery module are stacked, in two adjacent battery cell pouch battery housings 100, one can be connected to the other through its own three positioning folds 120, realizing the connection of the two pouch battery housings 100 on all sides except the tab 210 lead-out side, further improving the stacking assembly effect of the battery module. In some embodiments, the pouch battery housing 100 may also only have the assembly folds 130 connected to the positioning folds 120 connected to its two second sides 112, that is, the positioning folds 120 connected to the first side 111 are not connected to the assembly folds 130, and have no direct connection relationship with the adjacent pouch battery housing 100, or can be connected by other means (e.g., but not limited to additional connectors or adhesives), and is not limited to this embodiment.

[0050] like Figure 2 As shown, in one embodiment of this disclosure, the cross-section of the assembly flange 130 can be approximately "L"-shaped. Specifically, one end of the assembly flange 130 is connected to the positioning flange 120. The assembly flange 130 extends outward (i.e., away from the semi-open cavity) relative to the positioning flange 120 along the first direction X or the second direction Y, and then bends to extend away from the positioning flange 120 and the support plate 110 along the third direction Z. Accordingly, when the assembly flange 130 is connected to another adjacent soft-pack battery housing 100, the other end of the assembly flange 130 is used to connect to the outer surface of the positioning flange 120 of the other soft-pack battery housing 100. Through the above structural design, this disclosure can realize the extension of the assembly flange 130 to the outside of the positioning flange 120 of another soft-pack battery housing 100 for connection, which is convenient to operate and has a better connection effect. Furthermore, compared to an existing design where the pouch battery 200 is integrated into a module without constraints between adjacent heat sinks, the semi-disclosed design utilizes the aforementioned structural design to constrain the positioning edge 120 of another pouch battery housing 100 with the assembly edge 130, preventing deformation during module assembly, improving assembly efficiency and post-assembly flatness, thereby increasing the module integration yield. Additionally, during module stacking, the assembly edge 130, located outside the positioning edge 120 of adjacent pouch battery housings 100, can also enhance guiding functionality, providing auxiliary positioning and improving assembly accuracy and efficiency. In some embodiments, the assembly edge 130 may also be parallel to the support plate 110, i.e., the assembly edge 130 is used to connect to the support plate 110 of another pouch battery housing 100, and is not limited to this embodiment.

[0051] In one embodiment of this disclosure, the assembly connection between the folded edge 130 and another soft-pack battery housing 100 can be achieved by overlapping, snap-fitting, gluing, welding, riveting, etc. The specific connection method can be selected based on the intensity of the battery reaction and the structural requirements for thermoelectric separation. The selection of multiple methods can meet different battery performance requirements.

[0052] like Figure 1 As shown, in one embodiment of this disclosure, the positioning flange 120 connected to the first side 111 may be provided with a vent 1201, which penetrates the positioning flange 120 along the second direction Y. Through the above structural design, this disclosure can utilize the vent 1201 as an outlet for high-temperature gas release when the soft-pack battery 200 experiences thermal runaway, further improving the thermal safety performance of the battery module.

[0053] like Figure 1 As shown, based on the structural design of the positioning folded edge 120 with vent 1201, in one embodiment of this disclosure, vent 1201 can be respectively provided at both ends of the first side 111 connected to the positioning folded edge 120 in the first direction X. Through the above structural design, when the soft-pack battery 200 experiences thermal runaway, this disclosure can utilize two vent 1201 to improve the speed and uniformity of high-temperature gas release.

[0054] like Figure 1 As shown, in one embodiment of this disclosure, the soft-pack battery casing 100 may further include a buffer layer 150, which is disposed on the inner surface of the support plate 110. Accordingly, see [reference needed]. Figure 3 and Figure 4 When the pouch battery 200 is housed within the semi-open cavity of the pouch battery casing 100, a buffer layer 150 can be disposed on one surface of the pouch battery 200 in the third direction Z. In existing pouch battery heat dissipation devices, module length deviations caused by battery charging and discharging require buffer materials placed between batteries to mitigate the impact. This increases module cost and reduces assembly efficiency, while the assembly of multiple components also reduces module structural strength. In contrast, this disclosure, through the aforementioned structural design, utilizes the buffer layer 150 to mitigate stress on the pouch battery 200 during charging and discharging through gas deformation, thereby improving battery cycle life while avoiding impact on module assembly efficiency and ensuring module structural strength.

[0055] Based on the structural design of the soft-pack battery casing 100 including the buffer layer 150, in one embodiment of this disclosure, the plane formed by the first direction X and the second direction Y is defined as the reference plane. On this reference plane, the area of ​​the orthographic projection pattern of the buffer layer 150 and the area of ​​the orthographic projection pattern of the carrier plate 110 can account for 30% to 80%, such as 30%, 40%, 50%, 60%, 80%, etc.

[0056] It should be noted that the pouch battery housing 100 shown in the accompanying drawings and described in this specification is merely a few examples among many pouch battery housings 100 capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the pouch battery housing 100 shown in the accompanying drawings or described in this specification.

[0057] Based on the detailed description of several exemplary embodiments of the soft-pack battery housing 100 proposed in this disclosure above, an exemplary embodiment of the battery cell proposed in this disclosure will be described below.

[0058] See Figure 3 The illustration shows a representative three-dimensional structural diagram of the battery cell proposed in this disclosure. In this exemplary embodiment, the battery cell proposed in this disclosure is described as an example of its application in an automotive battery device. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this disclosure to other types of battery devices employing the pouch battery 200, and these changes are still within the scope of the principles of the battery cell proposed in this disclosure.

[0059] See also Figure 4 , Figure 4 The figure shows a representative exploded perspective view of a battery cell that embodies the principles of this disclosure, specifically showing the separation of the pouch battery casing 100 and the pouch battery 200 along the third direction Z. The structure, connection method, and functional relationship of the main components of the battery cell proposed in this disclosure will be described in detail below with reference to the above figures.

[0060] like Figure 3 and Figure 4 As shown, in one embodiment of this disclosure, the battery cell proposed in this disclosure includes a pouch battery 200 and a pouch battery housing 100 proposed in this disclosure and described in detail in the above embodiment. The pouch battery 200 is housed in a semi-open cavity of the pouch battery housing 100, and the tabs 210 of the pouch battery 200 are led out from the lead-out opening of the pouch battery housing 100.

[0061] It should be noted that the battery cells shown in the accompanying drawings and described in this specification are merely a few examples among many battery cells capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the battery cells shown in the accompanying drawings or described in this specification.

[0062] Based on the above detailed description of several exemplary embodiments of the battery cell proposed in this disclosure, an exemplary embodiment of the battery module proposed in this disclosure will be described below.

[0063] See Figure 5 , Figure 5 The diagram illustrates a three-dimensional structural schematic of a battery module embodying the principles of this disclosure in an exemplary embodiment. The battery module of this disclosure includes multiple battery cells as described in detail in the above embodiment, stacked together. In adjacent battery cells, one cell is abutted to the support plate 110 of the other cell via a mounting opening and connected to the other cell via a mounting flange 130.

[0064] Specifically, in one embodiment of this disclosure, the stacking direction of multiple battery cells is defined as the aforementioned third direction Z, where the third direction Z is horizontal, and the tabs 210 of the pouch battery 200 are defined to extend from the top, thus the aforementioned second direction Y is vertical. Based on this, the support plate 110 is a structure perpendicular to the module stacking direction, which can quickly transfer heat from the "large surface" of the pouch battery 200. Furthermore, the positioning folded edge 120 connected to the first side 111 can contact the bottom structure of the battery device (e.g., the bottom plate of the battery box), and the positioning folded edge 120 connected to the second side 112 can contact the side structure of the battery device (e.g., the side beam or middle beam of the battery box), thereby further increasing the heat dissipation area of ​​the battery and achieving rapid heat dissipation.

[0065] It should be noted that the battery modules shown in the accompanying drawings and described in this specification are merely a few examples among many battery modules capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the battery modules shown in the accompanying drawings or described in this specification.

[0066] In summary, the pouch battery housing 100 proposed in this disclosure includes a support plate 110, which has two first sides 111 and two second sides 112. Positioning flanges 120 are respectively connected to one first side 111 and the two second sides 112. The support plate 110 and the three positioning flanges 120 together form a semi-open cavity for accommodating the pouch battery 200, and the semi-open cavity has an assembly opening. A barrier structure is provided on the first side 111 where no positioning flange 120 is provided, and the area of ​​the first side 111 where no barrier structure is provided forms an outlet opening communicating with the semi-open cavity. The outlet opening allows the tab 210 of the pouch battery 200 to be led out. The barrier structure can block part of the gas flow path from the semi-open cavity to the outlet opening. An assembly flange 130 is connected to the positioning flange 120, and the pouch battery housing 100 can be connected to another pouch battery housing 100 via the assembly flange 130. Through the above structural design, this disclosure can block the gas flow path from the semi-open cavity to the lead-out opening side using a barrier structure, thereby preventing the high-temperature flammable gas generated when the pouch battery 200 experiences thermal runaway from being discharged through the lead-out opening, and preventing insulation failure at the tab 210 end or the accumulation of residual material leading to a short circuit within the module. Furthermore, since the pouch battery housing 100 adopts a semi-open cavity design and is connected to adjacent pouch battery housings 100 using assembly flanges 130, it improves the convenience of stacking multiple battery cells using the pouch battery housing 100 proposed in this disclosure, and enhances the connection reliability of adjacent battery cells. In addition, the pouch battery housing 100 proposed in this disclosure includes only one support plate 110, thereby reducing the space occupied by the pouch battery housing 100, lowering material costs, meeting the requirements of lightweight design, and contributing to improving the energy density after multiple battery cells are stacked together.

[0067] The foregoing has described and / or illustrated exemplary embodiments of the soft-pack battery casing, battery cell, and battery module proposed in this disclosure. However, the embodiments of this disclosure are not limited to the specific embodiments described herein; rather, components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment may also be used in combination with other components and / or steps of other embodiments. In describing the elements / components / etc. described and / or illustrated herein, the terms “a,” “an,” and “the above” are used to indicate the presence of one or more elements / components / etc. The terms “comprising,” “including,” and “having” are used to indicate an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to those listed. Furthermore, the terms “first” and “second” in the claims and specification are used only as illustrative marks and are not intended to limit the numerical scope of the subject matter.

[0068] Although the pouch battery housing, battery cell and battery module of this disclosure have been described with respect to different specific embodiments, those skilled in the art will recognize that modifications may be made to the implementation of this disclosure within the spirit and scope of the claims.

Claims

1. A soft-pack battery casing, characterized in that: The pouch battery housing includes a support plate, which is rectangular and has two first sides and two second sides. The first sides extend along a first direction, and the two first sides are spaced apart along a second direction perpendicular to the first direction. The second sides extend along the second direction, and the two second sides are spaced apart along the first direction. One of the first sides and the two second sides are respectively connected to a positioning flange extending towards the same side in a third direction, which is perpendicular to both the first and second directions. The support plate and the three positioning flanges together form a semi-open cavity for accommodating the pouch battery, and the semi-open cavity has an assembly opening facing the third direction. Wherein, the first side without the positioning fold is provided with a barrier structure, and the area of ​​the first side without the barrier structure forms an outlet opening connected to the semi-open cavity, the outlet opening allowing the tabs of the soft-pack battery to be led out; the barrier structure can block part of the gas flow path from the semi-open cavity to the outlet opening side. The positioning folded edge is connected to the assembly folded edge, and the soft-pack battery housing can be connected to another soft-pack battery housing via the assembly folded edge.

2. The soft-pack battery casing according to claim 1, characterized in that, The barrier structure includes a barrier plate connected to the first side that is not connected to the positioning fold, and the barrier plate connected to the positioning fold connected to the second side. The barrier plate and the positioning fold extend in the same direction in the third direction and have the same width in the third direction.

3. The soft-pack battery casing according to claim 2, characterized in that, The first side edge that is not connected to the positioning fold is connected to the two ends of the first direction with the barrier plate, and the two barrier plates are respectively connected to the two positioning folds.

4. The soft-pack battery casing according to claim 1, characterized in that: The positioning flanges connected to the two second side edges are respectively connected to the assembly flanges; or The three positioning flanges are respectively connected to the assembly flanges.

5. The soft-pack battery casing according to claim 1, characterized in that: The cross-section of the assembly fold is "L" shaped. One end of the assembly fold is connected to the positioning fold, and the other end is used to connect to the outer surface of the positioning fold of another soft-pack battery housing. or The assembly flange is parallel to the support plate, and the assembly flange is used to connect to the support plate of another soft-pack battery housing.

6. The soft-pack battery casing according to claim 1, characterized in that, The positioning fold connected to the first side is provided with a vent, and the vent extends through the positioning fold along the second direction.

7. The soft-pack battery casing according to claim 6, characterized in that, The first side, which is connected to the positioning fold, has vents at both ends in the first direction.

8. The soft-pack battery casing according to claim 1, characterized in that, The pouch battery housing further includes a buffer layer disposed on the inner surface of the support plate; wherein, when the pouch battery is housed in the semi-open cavity, the pouch battery is disposed on the buffer layer on the third-side surface.

9. A battery cell, characterized in that, The invention includes a pouch cell battery and a pouch cell battery housing as described in any one of claims 1 to 8, wherein the pouch cell battery is housed in a semi-open cavity of the pouch cell battery housing, and the tabs of the pouch cell battery are led out from the lead-out opening of the pouch cell battery housing.

10. A battery module, characterized in that, It includes a plurality of battery cells as described in claim 9, wherein the plurality of battery cells are stacked together; wherein, in two adjacent battery cells, one of them is mated to the carrier plate of the other through the assembly opening and is connected to the other through the assembly fold.

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