Battery module with compression pad, battery pack including the same, and vehicle

Abstract

The present disclosure provides a battery module having a compression pad, a battery pack including the same, and a vehicle. The battery module according to an embodiment of the present disclosure includes a battery stack in which a plurality of batteries are stacked; and a compression pad provided on an outer surface of the battery stack, wherein the compression pad is a laminate of an elastic pad and a synthetic resin film attached to at least one surface of the elastic pad, wherein the synthetic resin film includes a length extension portion having a length greater than a length of the elastic pad, and the length extension portion is folded to cover and protect an upper surface of the battery stack.

Description

[0001] This application is a divisional application of the original patent application No. 202280007504.9 (International Application No.: PCT / KR2022 / 004898, Application Date: April 5, 2022, Invention Title: Battery Module with Improved Insulation and Assemblance Including Compression Pad, Battery Pack Including the Battery Module and Vehicle). Technical Field

[0002] This disclosure relates to battery modules, and more specifically, to improved battery modules that enhance insulation and assemblability between battery stacks and frame members. This disclosure also relates to battery packs and vehicles that include battery modules.

[0003] This application claims priority to Korean Patent Application No. 10-2021-0044324, filed in Korea on April 5, 2021, the disclosure of which is incorporated herein by reference. Background Technology

[0004] Secondary batteries, which are easy to apply according to product categories and possess electrical characteristics such as high energy density, are widely used in electric or hybrid vehicles powered by electric drive sources, energy storage systems, and portable devices. As a new energy source that improves eco-friendliness and energy efficiency, secondary batteries have attracted much attention because they not only have the major advantage of significantly reducing fossil fuel use, but also do not produce byproducts when using energy.

[0005] Small mobile devices use one or two to four batteries, while medium / large devices such as vehicles require high output and large capacity. Therefore, medium / large battery modules are used, which include battery stacks that electrically connect multiple batteries. Since it is preferable to manufacture medium / large battery modules with the smallest possible size and weight, prismatic batteries, pouch batteries, etc., which can be stacked in a highly integrated manner and have a small weight-to-capacity ratio, are mainly used as individual cells in medium / large battery modules.

[0006] Meanwhile, the battery module includes a frame structure for housing the battery stack within an internal space to protect the battery stack from external impacts, heat, or vibration. Figure 1 This is a perspective view of a conventional battery module. Figure 2 It is along Figure 1 The decomposed and assembled cross-sectional view obtained from line A-A' in the diagram.

[0007] Reference Figure 1 and Figure 2 In a conventional battery module 1, the frame member 20 housing the battery stack 10 includes a housing 22 and a cover 24. A buffer member 30 is disposed between the battery stack 10 and the housing 22.

[0008] The buffer member 30 is compressed as the battery expands due to expansion, absorbing the expansion or protecting the battery stack 10 from external shocks or vibrations. An insulator is additionally inserted into the main areas inside the frame member 20 to ensure insulation of the battery stack 10. For example, in... Figure 1 In the battery module 1 shown, a roof-shaped thin film 26 is added inside the cover 24 to protect the edges of the battery stack 10.

[0009] like Figure 2 As shown in (a), when the battery stack 10 is placed in the housing 22 and then the cover 24 is assembled onto the battery stack 10, as Figure 2 As shown in (b), the eaves-shaped film 26 is susceptible to disturbance during assembly, which may cause the film 26 to deform or be damaged upon collision with the buffer member 30 or the battery stack 10. In addition, in the battery module 1 with this structure, there are inevitably areas that are partially exposed due to assembly or process, which is a safety issue and therefore requires improvement.

[0010] In particular, the sealing portion of the pouch cell is prone to insulation issues due to the cutting process, and when the pouch cell is used as the cell constituting the battery stack 10, there is a need for continuous improvement to ensure insulation for the cell positioned particularly close to the frame member 20, i.e., the outermost cell. Summary of the Invention

[0011] Technical issues

[0012] This disclosure aims to address problems in the related field, and therefore aims to provide a battery module that can ensure the insulation of the outermost battery of the battery stack and minimize defects when assembling the battery stack and frame components.

[0013] However, the technical problems to be solved by this disclosure are not limited to the above-mentioned problems. Other problems not mentioned herein can be clearly understood by those skilled in the art from the following description of this disclosure.

[0014] Technical solution

[0015] In one aspect of this disclosure for solving the above-mentioned technical problems, a battery module is provided, including a battery stack having a plurality of batteries stacked thereon; and a compression pad disposed on the outer surface of the battery stack, wherein the compression pad is a stack of an elastic pad and a synthetic resin film attached to at least one surface of the elastic pad, wherein the synthetic resin film includes a length extension having a length greater than the length of the elastic pad, and the length extension is folded to cover and protect the upper surface of the battery stack.

[0016] The battery can be a pouch cell including a sealed portion, and the length extension can be folded to cover the sealed portion.

[0017] The elastic pad can be polyurethane foam, and the synthetic resin film can be PET.

[0018] Compression pads can be attached to the outer large areas of the two outermost batteries of the battery stack, and the length extensions on both sides of the battery stack can be folded inward to protect the two upper edges of the battery stack.

[0019] Here, the length extensions folded from both sides of the battery stack can be non-intersecting or non-overlapping on the upper surface of the battery stack.

[0020] The elastic pad of the compression pad can face inward toward the battery, while the synthetic resin film can be located on the outside.

[0021] The battery module according to an embodiment of the present disclosure may further include a U-shaped frame that accommodates a battery stack and has an open top; and a top plate that covers the battery stack on the open top of the U-shaped frame, wherein the surface of the battery stack perpendicular to the stacking direction of the plurality of batteries may be mounted on the bottom of the U-shaped frame, and there may be no components that interfere with the batteries between the top plate and the battery stack.

[0022] The top plate and battery stack can be spaced apart.

[0023] The elastic pad of the compression pad can be adhered to one surface of the battery with an adhesive, and the length extension can be adhered to the upper surface of the battery with an additional adhesive.

[0024] Here, the adhesive may be provided in one or more locations in the form of a strip extending along the longitudinal direction of the battery.

[0025] The battery module may also include additional compression pads disposed between the batteries in the battery stack.

[0026] Additional compression pads can be placed between battery groups, each battery group comprising a predetermined number of batteries.

[0027] Meanwhile, in another aspect of this disclosure, a battery pack and a vehicle including the battery module according to this disclosure as described above are provided.

[0028] Beneficial effects

[0029] According to one aspect of the invention, the compression pad is a stack of an elastic pad and a synthetic resin film, wherein the length of the synthetic resin film attached to the outermost part of the compression pad is longer than the length of the elastic pad, such that the extended portion covers the edge of the upper surface of the battery stack. Therefore, insulation can be additionally ensured for portions inevitably exposed during the assembly process of the battery stack and frame components.

[0030] In particular, when the battery included in the battery module is a pouch battery, the length extension of the synthetic resin film of the compression pad of this disclosure can minimize the cut surface of the sealed portion of the battery or the exposed portion of the folded portion of the battery, thereby improving insulation performance.

[0031] Furthermore, according to one aspect of this disclosure, no additional insulator is required to ensure the insulation of the battery stack inside the frame member, thereby simplifying the structure of the frame member. As a result, defects caused by interference can be minimized when the battery stack is inserted into the frame member and assembled. Attached Figure Description

[0032] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the foregoing disclosure, serve to provide a further understanding of the technical features of the present disclosure; therefore, the present disclosure should not be construed as limited to the drawings.

[0033] Figure 1 This is a perspective view showing a conventional battery module.

[0034] Figure 2 It is along Figure 1 The decomposed and assembled cross-sectional view obtained from line A-A' in the diagram.

[0035] Figure 3 This is an exploded perspective view showing a battery module according to an embodiment of the present disclosure.

[0036] Figure 4 It shows the combination of components Figure 3 A perspective view showing the state of the components of the battery module.

[0037] Figure 5 This is a diagram illustrating a battery applied to a battery module according to an embodiment of the present disclosure.

[0038] Figure 6a and 6b This is a diagram illustrating a battery stack applied to a battery module according to an embodiment of the present disclosure, wherein... Figure 6a This is a perspective view showing the state of the synthetic resin film before the length extension of the folded compression pad. Figure 6b It is along Figure 6a The cross-sectional view obtained by line B-B'.

[0039] Figure 7a and 7b This is a diagram illustrating a battery stack applied to a battery module according to an embodiment of the present disclosure, wherein... Figure 7a This is a perspective view showing the state of the synthetic resin film after the length extension of the folded compression pad. Figure 7b It is along Figure 7a The cross-sectional view obtained by the line C-C'.

[0040] Figure 8 These are side and front views showing a compression pad applied to a battery module according to an embodiment of the present disclosure.

[0041] Figure 9 This is a diagram showing the location of the adhesive applied to the compression pad of a battery module according to an embodiment of the present disclosure.

[0042] Figure 10 It shows along Figure 7a An exploded and assembled cross-sectional view of a battery module according to an embodiment of the present disclosure is obtained by line C-C'.

[0043] Figure 11 This is a schematic diagram illustrating a battery pack according to an embodiment of the present disclosure.

[0044] Figure 12 This is a schematic diagram illustrating a vehicle according to an embodiment of the present disclosure. Detailed Implementation

[0045] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Before the description, it should be understood that the terminology used in the specification and appended claims should not be construed as limited to its general and dictionary meaning, but rather is interpreted based on the meaning and concept corresponding to the technical aspects of the present disclosure, on the basis of allowing the inventors to appropriately define the terms to obtain the best interpretation. Therefore, the description presented herein is merely a preferred example for illustrative purposes and is not intended to limit the scope of the present disclosure; thus, it should be understood that other equivalent substitutions and modifications can be made thereto without departing from the scope of the present disclosure.

[0046] First, refer to Figures 3 to 5 A battery module according to an embodiment of this disclosure is described.

[0047] Figure 3 This is an exploded perspective view showing a battery module according to an embodiment of the present disclosure. Figure 4 It indicates that the combination constitutes Figure 3 A perspective view showing the state of the components of the battery module. Figure 5 This is a diagram illustrating a battery applied to a battery module according to an embodiment of the present disclosure.

[0048] Reference Figures 3 to 5 According to an embodiment of the present disclosure, the battery module 90 includes a battery stack 100 and a frame member 200 for accommodating the battery stack 100.

[0049] The battery stack 100 is formed by stacking multiple batteries 110. The frame member 200 includes a U-shaped frame 210 that houses the battery stack 100 and is open at the top, and a top plate 220 that covers the battery stack 100 on top of the U-shaped frame 210. The surface of the battery stack 100, perpendicular to the stacking direction of the multiple batteries 110, is mounted on the bottom of the U-shaped frame 210.

[0050] The upper, left, and right surfaces of the U-shaped frame 210 are open. End plates 230 may be located on the left and right surfaces of the battery stack 100, respectively. Additionally, a busbar frame 240 may be included between the battery stack 100 and the end plates 230.

[0051] When the two open sides of the U-shaped frame 210 are referred to as the first side and the second side, respectively, the U-shaped frame 210, except for the surfaces of the battery stack 100 corresponding to the first and second sides, allows the plate-like structure to be folded continuously around the adjacent front, lower, and rear surfaces of the remaining outer surfaces. The upper surface corresponding to the lower surface of the U-shaped frame 210 is open. A thermally conductive resin layer 212 can be formed at the bottom of the U-shaped frame 210.

[0052] The top plate 220 has a single plate-like structure that surrounds the remaining upper surface, excluding the front, lower, and rear surfaces surrounded by the U-shaped frame 210. The U-shaped frame 210 and the top plate 220 can be formed in a state where their corresponding edge portions are in contact with each other, and can be joined around the battery stack 100 by welding or the like. That is, the U-shaped frame 210 and the top plate 220 can be joined at their respective edge portions by joining methods such as welding to form a welded portion CP.

[0053] For example, a pouch cell battery can be used as battery 110. When battery 110 is the aforementioned pouch cell battery, as... Figure 5 As shown, the battery 110 can be formed to include an electrode assembly (not shown), a pouch 111, electrode leads 112, and a sealing strip 113.

[0054] Although not shown in the figure, it is preferred that the electrode assembly has a separator between alternatingly stacked positive and negative plates, and the separator is located on the outermost sides for insulation.

[0055] The positive electrode plate includes a positive current collector and a layer of positive active material coated on one surface of the positive current collector. An uncoated positive electrode area without positive active material is formed at one end of the positive current collector to serve as a positive electrode contact.

[0056] The negative electrode plate includes a negative current collector and a layer of negative active material coated on one or both surfaces of the negative current collector. An uncoated negative electrode area without negative active material is formed at one end of the negative current collector to serve as a negative electrode contact.

[0057] In addition, the separator can be made of porous material, allowing ions to move between the positive and negative plates by using an electrolyte as a medium, while the separator is located between the positive and negative plates to prevent the electrode plates with different polarities from coming into direct contact with each other.

[0058] The bag shell 111 includes a receiving portion 111a for accommodating the electrode assembly, and a sealing portion 111b extending circumferentially from the receiving portion 111a and sealing the bag shell 111 by thermal bonding and sealing when the electrode leads 112 are led out to the outside.

[0059] Although not shown in the figure, the bag shell 111 is sealed by heat-bonding the contact portions of each edge of the upper and lower shells, which are made of a multilayer bag film with resin layers / metal layers / resin layers stacked in sequence.

[0060] A pair of electrode leads 112 are connected to a positive electrode contact (not shown) and a negative electrode contact (not shown), respectively, and are led out to the outside of the casing 111. The pair of electrode leads 112 face each other and protrude from one end and the other end of the battery 110, respectively. The direction in which the electrode leads 112 protrude from both ends of the casing 111 can be defined as the longitudinal direction of the battery 110.

[0061] The sealing tape 113 is attached to the periphery of the electrode lead 112 and is located between the inner surface of the sealing portion 111b of the bag shell 111 and the electrode lead 112. The sealing tape 113 prevents the sealing performance of the sealing portion 111b from being weakened due to the lead-out of the electrode lead 112.

[0062] Multiple batteries 110 can be used as Figure 3 As shown, the batteries are stacked along the Y-axis. If the surface of the pouch 111 is smooth, the multiple batteries 110 are prone to slipping due to external impacts during stacking. Therefore, to prevent such slippage and maintain a stable stacked structure of the batteries 110, adhesives such as double-sided tape or chemical adhesives that bond through a chemical reaction during the bonding process can be attached to the surface of the pouch 111 to form the battery stack 100. In this embodiment, the battery stack 100 is stacked along the Y-axis and housed in a U-shaped frame 210 along the Z-axis, thereby allowing cooling via the thermally conductive resin layer 212.

[0063] Before mounting the battery stack 100 to the bottom of the U-shaped frame 210, a thermally conductive resin can be applied to the bottom of the U-shaped frame 210, and the thermally conductive resin can be cured to form a shape such as Figure 3 The thermally conductive resin layer 212 is shown. Before the thermally conductive resin layer 212 is formed, i.e., before the applied thermally conductive resin cures, the battery stack 100 can be mounted on the bottom of the U-shaped frame 210 while moving the battery stack 100 in a direction perpendicular to the bottom of the U-shaped frame 210. Thereafter, the thermally conductive resin layer 212, formed by curing the thermally conductive resin, is disposed between the bottom of the U-shaped frame 210 and the battery stack 100. The thermally conductive resin layer 212 can be used to transfer heat generated by the battery 110 to the bottom of the battery module 90 and to fix the battery stack 100.

[0064] Because the resin layer / metal layer / resin layer of the bag shell 111 is exposed at the cross-section due to the cutting process, therefore Figure 5 The sealed portion 111b of the battery 110 shown is a weakly insulating part. In this disclosure, as... Figure 3 As shown, a compression pad 120 is disposed on the outer surface of the battery stack 100 to protect the sealing portion 111b. (Refer to...) Figures 6a to 9 A more detailed description of compression pad 120.

[0065] Figure 6a and 6b This is a diagram illustrating a battery stack applied to a battery module according to an embodiment of the present disclosure, wherein... Figure 6a This is a perspective view showing the state of the synthetic resin film before the length extension of the folded compression pad. Figure 6b It is along Figure 6a The cross-sectional view obtained by line B-B'. Figure 7a and 7b This is a diagram illustrating a battery stack applied to a battery module according to an embodiment of the present disclosure, wherein... Figure 7a This is a perspective view showing the state of the synthetic resin film after the length extension of the folded compression pad. Figure 7b It is along Figure 7a The cross-sectional view obtained by the line C-C'. Figure 8 These are side and front views showing a compression pad applied to a battery module according to an embodiment of the present disclosure. Figure 9 This is a diagram showing the location of the adhesive applied to the compression pad of a battery module according to an embodiment of the present disclosure.

[0066] like Figure 3 , Figure 6a , 6b and Figure 7a , Figure 7b As shown, the compression pad 120, which is unique to this disclosure, is disposed on the outer surface of the battery stack 100.

[0067] like Figure 8 As shown in detail, the compression pad 120 is a laminate of an elastic pad 122 and a synthetic resin film 124 attached to at least one surface of the elastic pad 122. Figure 8 In the image, (a) is a side view of the compression pad 120, and (b) is a front view of the compression pad 120. The synthetic resin film 124 includes a length extension 125, the length of which in the Z-axis direction is greater than the length of the elastic pad 122, and as shown... Figure 7aAs shown, the length extension 125 is folded in the Y-axis direction to cover and protect the upper surface of the battery stack 100. In particular, when the battery 110 is a pouch battery, the length extension 125 can be folded to cover the sealing portion 111b. The elastic pad 122 and the synthetic resin film 124 can be the same length in the X-axis direction, which can be the same as the length of the receiving portion 111a of the battery 110's pouch 111 or the same as the length of the battery 110.

[0068] like Figure 6a and 6b As shown, the elastic pad 122 of the compression pad 120 is positioned inwardly at the battery 110, and the synthetic resin film 124 is positioned outwardly at the outermost edge. When the battery 110 expands due to repeated charging and discharging of the battery module, causing the battery 110 to bulge and expand along the stacking direction (Y-axis direction), the elastic pad 122 can be compressed to absorb the expansion. Additionally, it can absorb impacts from the outside. Considering this function, the elastic pad 122 can be made of a suitable elastic material; specifically, the elastic pad 122 can be polyurethane foam.

[0069] The synthetic resin film 124 can minimize heat transfer to the elastic pad 122. Furthermore, the synthetic resin film 124 facilitates the handling of the compression pad 120. Preferably, the synthetic resin film 124 can be a material with very low thermal conductivity. The synthetic resin film 124 can be PET.

[0070] As shown in Figures 7a and 7b, the compression pads 120 can be attached to the outer large areas of the two outermost batteries 110 of the battery stack 100, respectively. The length extensions 125 located on both sides of the battery stack 100 can be folded inwards to protect the two upper edges of the battery stack 100. Here, as... Figure 7a and Figure 7b As shown, the length extensions 125 folded from both sides of the battery stack 100 can be arranged without intersecting or overlapping each other on the upper surface of the battery stack 100. When other components are included on the upper surface of the battery stack 100, the length extensions 125 are arranged without intersecting or overlapping each other on the upper surface of the battery stack 100, so that other components can be provided on the exposed portions.

[0071] The elastic pad 122 of the compression pad 120 can be adhered to one surface of the battery 110 by adhesive 126, and the length extension 125 can be adhered to the upper surface of the battery 110 by additional adhesive 127. (See reference...) Figure 9 One or more adhesives 126 are configured as strips extending longitudinally along the battery 110. Adhesives 126, 127 may be double-sided tape or adhesive.

[0072] At the same time, such as Figure 6a ,6b As shown in 7a and 7b, an additional compression pad 120' may be further included between batteries 110 in the battery stack 100.

[0073] An additional compression pad 120' is positioned between adjacent batteries 110, and only one additional compression pad 120' can be provided to minimize the increase in thickness of the battery stack 100. Therefore, when only one additional compression pad 120' is provided, it is preferable to position the additional compression pad 120' at the center of the battery stack 100 along the stacking direction. This is to effectively prevent thermal runaway from propagating between adjacent batteries 110.

[0074] The battery stack 100 may include multiple additional compression pads 120'. In this case, as... Figure 6a , 6b As shown in 7a and 7b, additional compression pads 120' can be provided between battery groups 110', each battery group 110' including a predetermined number of batteries. The number of batteries 110 to be included in a battery group can be determined by considering the number of batteries 110 included in the battery module, the capacity of the batteries 110, the thickness of the additional compression pads 120', etc.

[0075] Similar to compression pad 120, additional compression pad 120' can be a stack of elastic pad 122 and synthetic resin film 124. Specifically, additional compression pad 120' can be a stack of elastic pad 122 and synthetic resin film 124 as shown in the figure, but it can also be a sandwich structure with elastic pad 122 in the middle and synthetic resin film 124 on both sides of elastic pad 122. In additional compression pad 120', the length of synthetic resin film 124 can be the same as the length of elastic pad 122.

[0076] Meanwhile, a frame member 200 including a U-shaped frame 210 and a top plate 220 has been described as an example of an embodiment of this disclosure. The U-shaped frame 210 has an open upper surface, left surface, and right surface, making it easy to handle when mounting the battery stack 100. Since the top plate 220 and the battery stack 100 are spaced apart, it is easy to include other components on the upper surface of the battery stack 100.

[0077] Other frame members 200 structures can be used. For example, frame member 200 may include a single frame with open left and right surfaces to cover battery stack 100. In this case, after compression pad 120 is adhered to battery stack 100, at the length extension 125, as... Figure 7a and 7bIn the folded state shown, the battery stack 100 can be inserted into the open left or right surface of a single frame to be assembled. Alternatively, the frame member 200 may include a first L-shaped frame housing the battery stack 100 and having an open upper and one side, and a second L-shaped frame housing the battery stack 100 and having an open lower and one side, the first and second L-shaped frames being able to engage to surround the four surfaces of the battery stack 100.

[0078] As described above, the compression pad 120 is a stack of an elastic pad 122 and a synthetic resin film 124. The length of the synthetic resin film 124 attached to the outermost portion of the compression pad 120 is increased to be longer than the length of the elastic pad 122, such that the length extension 125 covers the edge of the upper surface of the battery stack 100. Therefore, insulation can be additionally ensured for portions inevitably exposed during the assembly process of the battery stack 100 and the frame members 200, particularly the top plate 220. In particular, when the battery 110 is a pouch battery, insulation performance can be improved by minimizing the cut surface of the sealing portion 111b or the exposed portion of the folded battery portion obtained by folding the sealing portion 111b.

[0079] Furthermore, when the battery stack 100 is inserted into the U-shaped frame 210 and the top plate 220 is assembled, defects caused by interference can be minimized. Figure 10 It shows along Figure 7a An exploded and assembled cross-sectional view of a battery module according to an embodiment of the present disclosure, obtained along line C-C'. See also... Figure 3 and Figure 10 The top plate 220 and the battery stack 100 are spaced apart, and there are no components between the top plate 220 and the battery stack 100 that would interfere with the battery 110. Since the compression pad 120 has a length extension 125 of the synthetic resin film 124 to cover the edge of the upper surface of the battery stack 100, the film with a structure such as an eaves, as is common in conventional battery modules 1, is not required. Even if an additional insulating film 222 is included, it will not interfere with the battery 110 because the insulating film 222 does not need to have an eaves structure and only needs to be flat.

[0080] In conventional battery module 1, the film of the top plate has an eaves shape to protect the edges, but it is highly susceptible to interference during assembly. In this disclosure, it is desirable to remove the corresponding shape to improve assembly. Even if the eaves shape used to protect the edges is removed from the existing film of the top plate, the length extension 125 of the synthetic resin film 124 of the outermost compression pad 120 of the battery stack 100 will cover and protect the edge of the upper surface of the battery stack 100, thus making it less likely to affect the insulation.

[0081] As described above, according to this disclosure, when a pouch cell is used as the cell 110 constituting the battery stack 100, it is excellent in ensuring insulation of the outermost cell 110, which is particularly close to the frame member 200, and can minimize defects in the assembly of the battery stack 100 and the frame member 200.

[0082] Figure 11 This is a schematic diagram illustrating a battery pack according to an embodiment of the present disclosure. The battery pack 300 is suitable for use as a battery pack for an electric vehicle. Figure 12 This is a schematic diagram illustrating a vehicle according to an embodiment of the present disclosure.

[0083] Reference Figure 11 and Figure 12 The battery pack 300 may include at least one battery module 90 according to the above embodiments and a battery pack housing 310 for encapsulating at least one battery module 90.

[0084] In addition to the battery module 90 and the battery pack housing 310, the battery pack 300 according to this disclosure may also include various devices for controlling the charging and discharging of the battery module 90, such as a BMS, a current sensor, a fuse, etc.

[0085] The battery module 90 has a generally cuboid shape and can be arranged in an orderly manner in the battery pack housing 310. Each battery module 90 is connected to ensure the power required to drive the vehicle 400.

[0086] The battery pack housing 310 is a container for fixing and housing the battery module 90, and is a rectangular box. Furthermore, the battery pack housing 310 can be positioned at a predetermined location within the vehicle 400.

[0087] Preferably, vehicle 400 can be an electric vehicle. Battery pack 300 can be used as an electrical energy source to drive vehicle 400 by providing driving force to the motor of the electric vehicle. In this case, battery pack 300 has a high nominal voltage of 100V or higher.

[0088] The battery pack 300 can be charged or discharged by the inverter according to the drive of the electric motor and / or internal combustion engine. The battery pack 300 can be charged by a regenerative charging device coupled to the brake. The battery pack 300 can be electrically connected to the motor of the vehicle 400 via the inverter. In addition, it is obvious that besides the vehicle, the battery pack 300 can also be installed in other devices, appliances, facilities, etc. that use secondary batteries, such as energy storage systems (ESS).

[0089] As described above, the battery pack 300 according to this embodiment, as well as devices, appliances, and facilities including the battery pack 300 such as a vehicle 400, include the battery module 90 described above, so that the battery pack 300 and devices, appliances, and facilities including the battery pack 300 can achieve all the advantages of the battery module 90 described above.

[0090] Meanwhile, the directional terms used herein, such as up, down, front, back, left, and right, are used for ease of description only, and it will be apparent to those skilled in the art that the terms can be changed depending on the position of the element or the observer.

[0091] This disclosure has been described in detail. However, it should be understood that while the detailed description and specific examples indicate preferred embodiments of this disclosure, they are given by way of illustration only, as various variations and modifications within the scope of this disclosure as defined by the appended claims will be apparent to those skilled in the art from the detailed description.

Claims

1. A battery module, the battery module comprising: Battery stacking; as well as A pair of compression pads are respectively attached to the outer side of the outermost battery in the battery stack, wherein the pair of compression pads are spaced apart from each other and do not extend between the batteries. Each compression pad is a stack of an elastic pad and a synthetic resin film attached to at least one surface of the elastic pad. The synthetic resin film is located outside the elastic pad and includes a length extension, the length of which is greater than the length of the elastic pad. The length extension is located outside the battery stack and at the upper edge of the battery stack, and each length extension is folded toward the middle of the battery stack to protect the upper edge of the battery stack and cover and protect the upper surface of the battery stack.

2. The battery module according to claim 1, in, The battery is a pouch cell including a sealed portion, and each length extension is folded to cover the sealed portion.

3. The battery module according to claim 1, in, The elastic pad is polyurethane foam, and the synthetic resin film is PET.

4. The battery module according to claim 1, in, The length extensions folded from both sides of the battery stack do not intersect or overlap each other on the upper surface of the battery stack.

5. The battery module according to claim 1, further comprising: A U-shaped frame that houses the battery stack and has an open top; as well as A top plate, which covers the battery stack on the open top of the U-shaped frame. The surface of the battery stack, perpendicular to the stacking direction of the plurality of batteries, is mounted on the bottom of the U-shaped frame, and There are no components that interfere with the batteries between the top plate and the battery stack.

6. The battery module according to claim 5, The top plate and the battery stack are spaced apart.

7. The battery module according to claim 1, in, The elastic pad of each compression pad is attached to one surface of the battery by adhesive, and each length extension is attached to the upper surface of the battery by additional adhesive.

8. The battery module according to claim 7, in, The adhesive is provided in one or more locations in the form of a strip extending along the longitudinal direction of the battery.

9. The battery module according to claim 1, further comprising: Additional compression pads are disposed between the batteries in the battery stack.

10. The battery module according to claim 9, in, The additional compression pads are disposed between the battery groups, each battery group comprising a predetermined number of batteries.

11. The battery module according to claim 9, in, The synthetic resin film of the first compression pad in the pair of compression pads is spaced apart from the synthetic resin film of the second compression pad in the pair of compression pads.

12. A battery pack comprising a battery module according to any one of claims 1 to 11.

13. A vehicle comprising a battery module according to any one of claims 1 to 11.

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