Battery module

Abstract

The present invention relates to a battery module including: a plurality of battery cells; and a heat exchange portion cooling the plurality of battery cells, wherein the heat exchange portion includes: a flow frame into and out of which a coolant flows; and a frame cover, as a frame cover in contact with the plurality of battery cells, combined to the flow frame and forming a flow space of the coolant flowing in and out together with the flow frame.

Description

Technical Field

[0001] This invention relates to a battery module, and more specifically, to a battery module with an improved heat exchange section structure. Background Technology

[0002] Unlike primary batteries, rechargeable and discharging secondary batteries are being actively researched due to the development of high-tech fields such as digital cameras, mobile phones, laptops, and hybrid vehicles. Secondary batteries can include nickel-cadmium (NiCd), nickel-metal hydride (NiMH), nickel-metal hydride (NiMH), and lithium-ion batteries. Lithium-ion batteries, with an operating voltage of 3.6V or higher, can be used as power sources for portable electronic devices or in high-power hybrid vehicles by connecting multiple lithium-ion batteries in series. Compared to NiCd or NiMH batteries, lithium-ion batteries have an operating voltage three times higher and superior energy density per unit weight, thus their use is rapidly increasing.

[0003] Lithium-ion batteries can be manufactured in various shapes, with representative shapes including cylindrical and prismatic types, primarily used in lithium-ion batteries. Lithium polymer batteries, which have gained significant attention in recent years, are manufactured in flexible pouch-type shapes, allowing for greater freedom in their shape selection.

[0004] These pouch-type lithium polymer batteries (hereinafter referred to as "pouch-type battery cells") are prone to tilting or bending, so they can only be used for a long time if protected by a robust housing. In conventional technology, for such series connection, the electrode terminals of each pouch are connected through a printed circuit board (PCB) with circuit patterns formed and placed in the housing.

[0005] However, the conventional method of constructing high-power battery modules by stacking pouch cells generates a significant amount of heat during charging or discharging, which can degrade the battery cells. Therefore, a battery pack with a structure that improves heat dissipation is needed. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] One aspect of the present invention provides a battery module with an improved structure.

[0008] In one aspect, the present invention provides a battery module with improved durability.

[0009] In one aspect, the present invention provides a battery module with improved cooling performance.

[0010] (II) Technical Solution

[0011] A battery module according to the present invention includes: a plurality of battery cells; and a heat exchange section for cooling the plurality of battery cells, the heat exchange section including: a flow frame for coolant inflow and outflow; and a frame cover, which, as a frame cover in contact with the plurality of battery cells, is attached to the flow frame and together with the flow frame forms a flow space for the coolant to flow in and out.

[0012] A pair of frame covers are provided, and the frame covers are respectively disposed on one side and the other side of the flow frame. The pair of frame covers can be configured to contact one side of the stack of the plurality of battery cells respectively.

[0013] The frame cover that contacts the plurality of battery cells may be made of a material with a higher thermal conductivity than the flow frame.

[0014] The flow frame may include a plastic material, and the frame cover may include a metal material.

[0015] The flow frame may include: a flow section configured to be covered by the frame cover to form the flow space; and an extension including an inlet and an outlet connected to the flow space and extending from the flow section.

[0016] The flow section may include: a frame body forming the outer periphery of the flow space; and a channel partition separating the flow space inside the frame body.

[0017] The flow section may include a gap space, which is configured such that the channel divider is spaced apart from the inlet.

[0018] The channel divider can separate and guide the flow of coolant through the inlet into the gap space.

[0019] The battery module includes: a module housing forming an internal space therein, wherein the plurality of battery cells and the heat exchange unit are installed in the internal space, and the heat exchange unit is configured to be respectively connected to and fixed to the module housing on one side and the other side of the frame body.

[0020] The frame body may include: a mounting portion, on which the outer periphery of the frame cover is mounted; and a mounting guide, disposed along the outer periphery of the mounting portion, to guide the frame cover to be mounted onto the mounting portion and to prevent contact between the frame cover and the module housing.

[0021] The installation guide may be disposed between the mounting portion and the module housing, and is formed to protrude more than the mounting portion along the outer periphery of the frame housing.

[0022] The connection between the frame body and the module shell can be achieved through at least one of bolting and heat fusion.

[0023] The plurality of battery cells may include: a sealing portion formed by an external member on three of the four outer peripheries of the battery cell and joined by the external member; an outer peripheral portion formed by the external member on the remaining side of the battery cell; and a protrusion formed between the sealing portion and the outer peripheral portion and protruding further than the outer peripheral portion, the frame cover corresponding to the outer peripheral portion and the extension corresponding to the protrusion.

[0024] The extension may be configured to have a second width that is smaller than the first width formed by the frame cover and the flow portion, in order to avoid interference with the protrusion.

[0025] The extension may include insulating material to prevent leakage of electricity from the protrusion it faces.

[0026] The extension may be formed by extending from the flow portion in the same planar direction as the flow portion.

[0027] The extension may include a reinforcement that supplements the strength of the inlet and outlet.

[0028] (III) Beneficial Effects

[0029] According to one aspect of the present invention, the cooling performance of the battery module can be improved by improving the structure of the heat exchange section.

[0030] According to one aspect of the present invention, the cost of the heat exchange section can be reduced and the battery module can be made lighter.

[0031] According to one aspect of the invention, the shape or size of the heat exchange section can be easily changed according to the shape or arrangement of the battery cells. Attached Figure Description

[0032] Figure 1 This is a perspective view of a battery module according to an embodiment of the present invention.

[0033] Figure 2 This is an exploded perspective view of a battery module according to an embodiment of the present invention.

[0034] Figure 3 This is a cross-sectional view of a battery module according to an embodiment of the present invention.

[0035] Figure 4 This is a perspective view of the heat exchange section of a battery module according to an embodiment of the present invention.

[0036] Figure 5 This is a front view of the heat exchange section of a battery module according to an embodiment of the present invention.

[0037] Figure 6 This is an exploded perspective view of the heat exchange section of a battery module according to an embodiment of the present invention.

[0038] Figure 7 This is a diagram illustrating the coolant flow in the heat exchange section of a battery module according to an embodiment of the present invention.

[0039] Figure 8 yes Figure 3 An enlarged view of A.

[0040] Figure 9 This is a perspective view of a battery cell of a battery module according to an embodiment of the present invention.

[0041] Figure 10 This is a diagram showing the arrangement of the battery cells and heat exchange section of a battery module according to an embodiment of the present invention.

[0042] Figure 11 This is a cross-sectional view of a battery module according to another embodiment of the present invention.

[0043] Figure 12 yes Figure 11 A magnified view of B.

[0044] Explanation of reference numerals in the attached figures

[0045] 1: Battery module 10: Housing

[0046] 20: Battery cell; 22: External components

[0047] 23: Sealing part 24: Peripheral part

[0048] 25: Protrusion 30: Battery Pack

[0049] 32: Stacked surface 50: Heat exchange section

[0050] 60: Flow frame 70: Flow section

[0051] 72: Flow space 73: Gap space

[0052] 74: Main frame 75: Installation section

[0053] 76: Installation guide 78: Channel divider

[0054] 80: Extension Section 83: Entrance

[0055] 84: Export 90: Frame Cover

[0056] 92: Cover body 94: Cover joint Detailed Implementation

[0057] The structures shown in the embodiments and drawings described in this specification are merely preferred embodiments of the disclosed invention, and various modifications that can replace the embodiments and drawings in this specification may be included when submitting this application.

[0058] In addition, the same reference numerals or symbols shown in the various figures of this specification indicate parts or components that perform substantially the same function.

[0059] Furthermore, the terminology used in this specification is for illustrative purposes only and is not intended to limit or restrict the disclosed invention. Unless the context clearly states otherwise, singular representations include plural representations. In this specification, terms such as "comprising" or "having" are intended to indicate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, without precluding the possibility of the presence or addition of one or more different features, numbers, steps, operations, components, parts, or combinations thereof.

[0060] Furthermore, the terms "first," "second," and other ordinal terms used in this specification may be used to describe various components, but the components are not limited by these terms; the terms are only used to distinguish one component from another. For example, without departing from the scope of the invention, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component. The term "and / or" includes a combination of multiple related description items or any one of multiple related description items.

[0061] In addition, terms such as “~part,” “~machine,” “~block,” “~component,” and “~module” refer to a unit that processes at least one function or operation. For example, these terms may refer to at least one piece of hardware such as a field-programmable gate array (FPGA) or application-specific integrated circuit (ASIC), at least one piece of software stored in memory, or at least one program processed by a processor.

[0062] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the drawings in this specification are only used to illustrate preferred embodiments of the present invention and to further understand the technical concept of the present invention together with the above description. The present invention should not be construed as being limited to the contents described in the drawings.

[0063] Figure 1 This is a perspective view of a battery module according to an embodiment of the present invention. Figure 2 This is an exploded perspective view of a battery module according to an embodiment of the present invention. Figure 3 This is a cross-sectional view of a battery module according to an embodiment of the present invention.

[0064] The battery module 1 may include a module housing 10, a plurality of battery cells 20 disposed inside the module housing 10, and a heat exchange section 50.

[0065] The module housing 10 may include a lower housing 11, an upper housing 12 disposed on the other side of the lower housing 11, and a front housing 13 and a rear housing 14 disposed on the front and rear sides of the upper housing 12 and the lower housing 11, respectively. Additionally, the module housing 10 may include a left housing 15 and a right housing 16 disposed on the left and right sides, respectively. In this embodiment, the left housing 15 and the right housing 16 are shown to be integrally formed with the upper housing 12, but this is not a limitation.

[0066] The module housing 10 can form a mounting space 10a inside, in which multiple battery cells 20 and a heat exchange unit 50 can be mounted. The combination of the module housing 10 with the multiple battery cells 20 and the heat exchange unit 50 will be described in detail below.

[0067] Multiple battery cells 20 can be provided. Multiple battery cells 20 can constitute a battery pack 30. The battery pack 30 can be formed by stacking multiple battery cells 20. Multiple battery packs 30 can be separated by heat exchange sections 50. The heat exchange sections 50 can be provided between the multiple battery packs 30 and contact the multiple battery packs 30 provided on both sides for heat exchange.

[0068] The heat exchange section 50 can be configured to cool the heat generated by the battery cells 20. The heat exchange section 50 can be configured to contact a plurality of stacked battery cells 20. The battery module 1 further includes a thermal contact component (not shown), and the thermal contact component can be configured to be disposed between the plurality of battery cells 20 and the heat exchange section 50 to increase the thermal contact area between the two components. The heat exchange section 50 can be disposed between a pair of battery packs 30 and is configured to face the stacking surface 32 of the pair of battery packs 30 (see reference). Figure 3That is, the heat exchange section 50 can be configured to contact the stacking surface 32 of the battery pack 30. Thus, the heat exchange section 50 is configured to separate the multiple battery packs 30, can act as a separator, and can effectively absorb heat dissipated to the stacking surface 32 of the battery pack 30. The heat exchange section 50 will be described in detail below. Although referred to as heat exchange section 50, it can also be called a heat exchanger or a radiator; any structure that cools the battery cells 20 is sufficient for the heat exchange section 50. The structure of the heat exchange section 50 is not limited by the name "heat exchange section 50" itself. Furthermore, although a structure in which refrigerant flows in the heat exchange section 50 is described in this embodiment, it can also be a structure in which refrigerant is stored internally, or a structure that does not use refrigerant.

[0069] Battery module 1 may include a busbar 40. The busbar 40 may be disposed on at least one side of the battery pack 30 to enable electrical connection between the plurality of battery cells 20 forming the battery pack 30. The busbar 40 may be configured such that electrode connectors 21 are provided in the surface covering the stacked battery cells 20 (see reference). Figure 9 The busbar cover (not shown) can cover the outside of the busbar 40 to protect the busbar 40. The busbar cover can be disposed between the busbar 40 and the front housing 13 and between the busbar 40 and the rear housing 14.

[0070] Figure 4 This is a perspective view of the heat exchange section of a battery module according to an embodiment of the present invention. Figure 5 This is a front view of the heat exchange section of a battery module according to an embodiment of the present invention. Figure 6 This is an exploded perspective view of the heat exchange section of a battery module according to an embodiment of the present invention. Figure 7 This is a diagram illustrating the coolant flow in the heat exchange section of a battery module according to an embodiment of the present invention. (See attached diagram.) Figure 1 Let me explain.

[0071] The heat exchange section 50 can be configured to cool a battery pack 30 consisting of multiple stacked battery cells 20.

[0072] The heat exchange section 50 may include a flow frame 60 and a frame cover 90. A flow space 72 for coolant flow (see reference) can be formed within it by combining the flow frame 60 and the frame cover 90. Figure 6 ).

[0073] The frame cover 90 forms the outer surface of the heat exchange section 50 and can be configured to contact multiple battery cells 20. The frame cover 90 can be made of a material with a higher thermal conductivity than the flow frame 60. That is, the flow frame 60 and the frame cover 90 can be made of different materials. Compared to the flow frame 60, the frame cover 90, which directly exchanges heat with the battery cells 20 and the battery pack 30, can be made of a material with relatively high thermal conductivity, thereby improving heat exchange efficiency. In addition, the shape of the flow frame 60, which does not require relatively high thermal conductivity, is easily changed, and its shape can be modified according to the capacity or arrangement of the battery pack. Thus, the flow frame 60 can change its flow space and flow channels according to the required cooling amount.

[0074] The materials of the flow frame 60 and the frame cover 90 are not limited. For example, the flow frame 60 may include a plastic material, and the frame cover 90 may include a metal material, but are not limited thereto. For the frame cover 90, the requirement is met as long as the frame cover 90 forming the outer surface is made of a material with a higher thermal conductivity than the flow frame 60.

[0075] The flow frame 60 may include a flow section 70 and an extension section 80.

[0076] The flow section 70 is configured to be covered by the frame cover 90 and can form a flow space 72 together with the frame cover 90. That is, the frame cover 90 can be configured to cover only the flow section 70 of the flow frame 60. The flow section 70 may include an opening 72a (see reference). Figure 6 The opening 72a is configured to communicate with the flow space 72 and is sealed by the frame cover 90.

[0077] The flow section 70 may include a frame body 74 and a channel partition 78.

[0078] The frame body 74 can be configured to form the frame of the flow section 70. The frame body 74 can be formed along the periphery of the flow space 72. That is, the frame body 74 can form the periphery of the flow space 72. The frame cover 90 can be attached to the flow section 70 by engaging with the frame body 74.

[0079] The channel partition 78 can be disposed inside the frame body 74. The channel partition 78 can be configured to divide the flow space 72. By dividing the flow space 72 into multiple flow channels, the channel partition 78 allows the incoming coolant to flow uniformly within the flow space 72.

[0080] The channel divider 78 may include a first divider 78a and a second divider 78b.

[0081] The first partition 78a can be disposed in the flow space 72 in the vertical direction. That is, the first partition 78a can divide the flow space 72 in the left and right directions. The width of the first partition 78a can form a flow channel for the coolant flow.

[0082] The second partition 78b can be disposed in the flow space 72 in the left-right direction. That is, the second partition 78b can divide the flow space 72 vertically. The second partition 78b can form a flow channel for coolant flow at a depth.

[0083] In this embodiment, a first partition 78a and two second partitions 78b are provided to divide the flow space 72 into six channels, but it is not limited to this.

[0084] The extension 80 can be configured to extend from the flow section 70. The extension 80 can be configured to extend in the same planar direction as the flow section 70. The extension 80 can extend from the flow section 70 and be formed in a plate-like shape. With this structure, even when the frame cover 90 is installed to the flow frame 60, the extension 80 can remain uncovered by the frame cover 90. The extension 80 may include a first extension 81 provided on one side of the flow section 70 and a second extension 82 provided on the other side of the flow section 70.

[0085] The extension 80 may include an inlet 83 and an outlet 84 connected to the flow space 72. The inlet 83 and the outlet 84 may be respectively provided on the first extension 81 and the second extension 82. Coolant flowing in from the inlet 83 may flow through the flow space 72 of the flow section 70 and then be discharged from the outlet 84.

[0086] The extension 80 may include a reinforcing portion 86 to strengthen the inlet 83 and the outlet 84. The reinforcing portion 86 is formed in a lattice shape, thereby performing the function of strengthening the inlet 83 and the outlet 84.

[0087] The flow section 70 may include a gap space 73 (see reference). Figure 6 and Figure 7 The gap space 73 is provided in the flow space 72 and can be configured to prevent the coolant flow rate from being reduced due to the flow resistance of the channel partition 78.

[0088] A gap space 73 can be formed between the channel partition 78 and the extension 80. Specifically, the gap space 73 can be formed between the channel partition 78 and the inlet 83, and between the channel partition 78 and the outlet 84. The gap space 73 can be formed by separating the channel partition 78 from the inlet 83 and the outlet 84.

[0089] The coolant flowing in through inlet 83 first flows into the gap space 73 between inlet 83 and channel partition 78. Figure 7 (a) and the flow is divided in the gap space 73 into the flow channels separated by the channel divider 78. Figure 7 (b) The coolant flowing through the flow channel flows into the gap space 73 between the outlet 84 and the channel partition 78. Figure 7 c), and discharged from the gap space 73 to the outlet 84. Through this process, the reduced flowability of the coolant due to differences in the flow cross-sectional areas or flow friction in the inlet 83, outlet 84, and flow space 72 can be prevented.

[0090] A pair of frame covers 90 can be provided, and the frame covers 90 can be respectively provided on both sides of the flow portion 70. That is, the pair of frame covers 90 cover the openings 72a formed on both sides of the flow portion 70, thereby forming a flow space 72 inside. The frame cover 90 may include: a cover body 92, which forms the flow space 72 together with the flow portion 70; and a cover connecting portion 94, which is provided on the outer periphery of the cover body 92 and connected to the flow portion 70.

[0091] The cover joint 94 can be configured to engage with the mounting portion 75 of the frame body 74, which will be described below. The method by which the cover joint 94 engages with the mounting portion 75 of the frame body 74 is not limited. For example, the cover joint 94 can be engaged with the mounting portion 75 by heat fusion or by bolting. For the cover joint 94, any structure that allows the cover joint 94 to engage with the mounting portion 75 to seal the flow space 72 is sufficient.

[0092] Figure 8 yes Figure 3 An enlarged view of A is shown in the attached diagram above.

[0093] The frame body 74 is attached to the module housing 10, thereby allowing the heat exchange section 50 to be fixed to the module housing 10. The frame body 74 can be configured to be attached to the module housing 10. Specifically, it is shown that one side and the other side of the frame body 74 are attached to the upper housing 12 and the lower housing 11, respectively. For example, as... Figure 8 As shown, the frame body 74 and the upper shell 12 can be connected by bolts 18 to pass through the holes in the frame body 74 and the connecting groove 12a in the upper shell 12. However, it is not limited to this. The frame body 74 of the heat exchange part 50 can be directly connected to the module shell 10 or formed integrally.

[0094] The frame body 74 may include a mounting section 75 and a mounting guide 76.

[0095] The mounting portion 75 can be configured such that the frame cover 90 is mounted to the mounting portion 75. Specifically, the cover joint portion 94 of the frame cover 90 can be configured to be mounted to the mounting surface 75a of the mounting portion 75.

[0096] The mounting guide 76 can be formed along the outer periphery of the mounting portion 75. The mounting guide 76 can be configured to guide the cover joint 94 of the frame cover 90 to be mounted to the mounting portion 75. The mounting guide 76 can be configured to be disposed along the outer periphery of the cover joint 94 when the frame cover 90 is mounted to the mounting portion 75. When the cover joint 94 is located in the mounting portion 75, the mounting guide 76 supports the outer periphery of the cover joint 94, thereby determining the position of the cover joint 94.

[0097] The mounting guide 76 can be configured to prevent direct contact between the cover joint 94 of the frame cover 90 and the module housing 10. For this purpose, the mounting guide 76 can be configured to protrude from the mounting surface 75a of the mounting portion 75. That is, when the frame cover 90 is mounted to the mounting portion 75, the mounting guide 76 can be positioned between the outer periphery of the cover joint 94 of the frame cover 90 and the module housing 10 to prevent direct contact between the cover joint 94 and the module housing 10. This prevents heat transfer to the frame cover 90 from being transferred to the module housing 10.

[0098] Figure 9 This is a perspective view of a battery cell in a battery module according to an embodiment of the present invention. Figure 10 This is a diagram showing the arrangement of the battery cells and heat exchange section of a battery module according to an embodiment of the present invention.

[0099] The battery cell 20 may include an electrode assembly (not shown) with an electrode connector 21 and an external member 22 for housing the electrode assembly. The external member 22 may include a sealing portion 23 that engages between the external members 22 and an outer peripheral portion 24 that does not engage between the external members 22. The outer peripheral portion 24 may refer to the portion of the outer periphery of the external member 22 other than the sealing portion 23. The sealing portion 23 may be formed on three of the four sides of the outer periphery formed by the external member 22, and the outer peripheral portion 24 may be formed on the remaining side.

[0100] The external member 22 may include a protrusion 25. The protrusion 25 may be formed between the sealing portion 23 and the outer peripheral portion 24. That is, the protrusion 25 may be configured to protrude more than the outer peripheral portion 24 during the formation of the sealing portion 23 and the outer peripheral portion 24.

[0101] The heat exchange section 50 may include a heat exchange section 52 and an extension 80. The heat exchange section 52 may include a flow section 70 for the aforementioned coolant flow and a frame cover 90 attached to the flow section 70.

[0102] The frame cover 90 of the heat exchange section 52 can correspond to the outer periphery 24 of the battery cell 20, and the extension 80 can be configured to correspond to the protrusion 25 of the battery cell 20. Since the protrusion 25 is formed to protrude more than the outer periphery 24, there may be a problem that the durability of the secondary battery is reduced due to wear caused by the external environment.

[0103] The extension 80 can be configured to prevent interference with the protrusion 25 of the battery cell 20. The extension 80 can be configured to form a second width w2 smaller than the first width w1 formed by the heat exchange section 52. That is, the frame cover 90 of the heat exchange section 52 can contact the outer periphery 24 of the battery cell 20, and the extension 80 can be formed with a narrower width to avoid interference with the protrusion 25, which protrudes more than the outer periphery 24. With this structure of the extension 80, when the battery cell 20 contacts the heat exchange section 50, wear and tear on the protrusion 25 from contacting the heat exchange section 50 can be prevented.

[0104] The extension 80 can be made of insulating material. Because the extension 80 is made of insulating material, leakage of electricity from the protrusion 25 can be prevented.

[0105] Hereinafter, a battery module according to another embodiment of the present invention will be described. In the description, structures identical to those described above will be omitted from the repetition of the above description.

[0106] Figure 11 This is a cross-sectional view of a battery module according to another embodiment of the present invention. Figure 12 yes Figure 11 A magnified view of B.

[0107] In the previous embodiment, the heat exchange section 50 and the module housing 10 were joined by bolts 18. In this embodiment, the heat exchange section 50 and the module housing 10 can be joined by thermal fusion 19.

[0108] The frame body 74 can be configured to be attached to the module housing 10. Specifically, it is shown that one side and the other side of the frame body 74 are attached to the upper housing 12 and the lower housing 11, respectively. Figure 11 , 12 As shown, the frame body 74 and the upper shell 12 can be joined by thermal fusion 19, but not limited thereto. The frame body 74 of the heat exchange part 50 can be directly joined to the module shell 10 or formed integrally.

[0109] The above description illustrates specific embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made by those skilled in the art without departing from the spirit of the technical concept of the invention as set forth in the claims.

Claims

1. A battery module, comprising: Multiple battery cells, wherein the multiple battery cells are arranged in at least two stacks adjacent to each other; The heat exchange section includes: a flow frame and a frame cover, which are joined together to form a flow space for coolant flow, and The module housing is configured to form an internal space, in which the at least two stacks and the heat exchange unit are mounted. The frame cover is in contact with the plurality of battery cells. The frame cover is integrated with the flow frame to form a flow space for the inflow and outflow of the coolant. The frame cover that contacts the plurality of battery cells is made of a material with higher thermal conductivity than the material of the flow frame. Wherein, the at least two stacks are arranged adjacent to each other along a direction perpendicular to the stacking direction of the plurality of battery cells in each stack. The heat exchange section is disposed between the at least two stacks and is parallel to the stacking direction of the plurality of battery cells in each stack. The heat exchange section faces one side of each of the plurality of battery cells, and the plurality of battery cells form the at least two stacks. The frame cover includes a pair of frame covers disposed on opposite sides of the flow frame, and each of the pair of frame covers contacts the outer periphery of each battery cell in the two adjacent stacks, the outer periphery being formed on one of the four outer peripheries of the battery cell.

2. The battery module according to claim 1, wherein, The material of the flow frame includes plastic, and The frame cover is made of metal.

3. The battery module according to claim 1, wherein, The flow framework includes: The flow section is configured to be covered by the frame cover to form the flow space; and The first and second extensions each include an inlet and an outlet, which are fluidly connected to the flow space and extend from the flow section.

4. The battery module according to claim 3, wherein, The flow section includes: The main frame forms the outer periphery of the flow space; and The channel divider separates the flow space inside the main frame body.

5. The battery module according to claim 4, wherein, The flow section includes a gap space, which is configured such that the channel divider is spaced apart from the inlet.

6. The battery module according to claim 5, wherein, The channel divider separates and guides the flow of coolant through the inlet into the gap space.

7. The battery module according to claim 5, The heat exchange section is configured such that one side and the other side of the frame body are respectively joined and fixed to the module housing.

8. The battery module according to claim 7, wherein, The main body of the framework includes: Mounting portion, the outer periphery of the frame cover is mounted on the mounting portion; and Installation guides are provided along the outer periphery of the mounting portion to guide the frame cover to be installed into the mounting portion and to prevent contact between the frame cover and the module housing.

9. The battery module according to claim 8, wherein, The mounting guide is configured to be disposed between the mounting portion and the module housing, and is formed to protrude more than the mounting portion along the outer periphery of the frame housing.

10. The battery module according to claim 7, wherein, The frame body and the module shell are joined by at least one of bolting and heat fusion.

11. The battery module according to claim 3, wherein, The plurality of battery cells include: A sealing portion, formed by an external member, is formed on three sides of the outer periphery of the four sides of the battery cell, and is formed by joining the external member; The outer periphery, formed by an external component, is formed on the remaining side of the battery cell; and A protrusion is formed between the sealing portion and the outer peripheral portion, and protrudes further than the outer peripheral portion. The frame cover is configured to be positioned adjacent to and in contact with the outer periphery, and the extension is configured to accommodate the protrusion.

12. The battery module according to claim 11, wherein, The extension is configured to have a second width that is smaller than the first width formed by the frame cover and the flow portion, in order to avoid interference with the protrusion.

13. The battery module according to claim 11, wherein, The extension includes an insulating material to prevent leakage of electricity from the protrusion it faces.

14. The battery module according to claim 3, wherein, The extension extends from the flow portion in the same plane direction as the flow portion and is not covered by the frame cover.

15. The battery module according to claim 3, wherein, The extension includes a reinforcement that supplements the strength of the inlet and outlet.

16. The battery module according to claim 3, wherein, The extension includes a first extension and a second extension, the first extension being disposed on a first side of the flow portion, and the second extension being disposed on a second side of the flow portion opposite to the first side.

17. The battery module according to claim 3, wherein, The flow section includes an opening that communicates with the flow space and is open toward the plurality of battery cells, the opening being sealed by the frame cover to form the flow space.

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