KR20240101323A - Battery module with integrated cell fixing tray, battery pack and vehicle comprising the battery module - Google Patents

Abstract

A battery module according to the present invention includes a plurality of battery cells; and a module case that stores the plurality of battery cells therein and includes a case body that partially holds and supports the plurality of battery cells.

Description

Battery module with integrated cell fixing tray, battery pack and vehicle including the same {BATTERY MODULE WITH INTEGRATED CELL FIXING TRAY, BATTERY PACK AND VEHICLE COMPRISING THE BATTERY MODULE}

The present invention relates to a battery module, and more specifically, a cell fixing tray integrated into a module case, which secures structural rigidity while reducing the number of parts, thereby reducing production costs and making the assembly process easier. It relates to a battery module equipped with.

Recently, as the demand for portable electronic products such as laptops, video cameras, and portable phones has rapidly increased, and as the development of electric vehicles, energy storage batteries, robots, and satellites has begun, high-performance secondary batteries capable of repeated charging and discharging have been developed. Research is actively underway.

Currently commercialized secondary batteries include nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, and lithium secondary batteries. Among these, lithium secondary batteries are in the spotlight for their advantages of free charging and discharging, very low self-discharge rate, and high energy density as they have almost no memory effect compared to nickel-based secondary batteries.

These lithium secondary batteries mainly use lithium-based oxide and carbon material as positive and negative electrode active materials, respectively. In addition, the lithium secondary battery includes a positive and negative electrode plate coated with the positive and negative electrode active materials, an electrode assembly in which the positive and negative electrode plates are disposed with a separator in between, and an exterior material that seals and stores the electrode assembly with an electrolyte.

Meanwhile, lithium secondary batteries can be classified into pouch-type secondary batteries, in which the electrode assembly is built into a pouch of an aluminum laminate sheet, and can-type secondary batteries, in which the electrode assembly is built in a metal can, depending on the shape of the battery case. Also, can-type secondary batteries can be further classified into cylindrical batteries and prismatic batteries depending on the shape of the metal can.

The lithium secondary battery is made into a dense structure by overlapping or stacking multiple battery cells mounted on themselves or in a cartridge to provide high voltage and current, and then electrically connecting them into a battery module or battery pack. It is being used.

Figure 1 is a diagram schematically showing a battery module with a storage structure for storing a conventional cylindrical battery.

Referring to FIG. 1, in the case of a battery module of a cylindrical battery, a cell frame (2) is attached to the rear of the module case (1) to store and fix a plurality of cylindrical cells arranged in the horizontal direction and upright in the vertical direction. The cell frame 20 is provided with a storage groove 3 of a shape corresponding to the shape of the cylindrical battery to stably accommodate and secure the cylindrical batteries 4. Next, it is completed by injecting structural resin (5). Here, the cell frame 2 can be manufactured by injection molding.

However, since the conventional cell frame 2 is prepared as a separate part from the module case, production costs increase due to an increase in the number of parts, and since it is attached to the module case, structural rigidity is impaired.

In addition, after storing the cylindrical battery (4) in the existing cell frame (2), structural resin (5) is injected into each storage groove (3) to fix the battery cell. The gap is small and the injection amount is constant depending on the work environment. Therefore, there is a problem in that the contact area between the cylindrical battery 4 and the structural resin 5 is not uniform, making it impossible to stably fix the cylindrical battery 4.

The present invention was created in consideration of the above problems, and the problem to be solved by the present invention is to secure the structural rigidity of the module case, reduce the weight of the battery module and reduce production costs, and ensure uniformity of the structural resin material. By enabling injection, the contact area between the battery cell and the structural resin material is sufficient to provide a battery module that can stably fix the battery cell.

The technical problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention described below.

A battery module according to the present invention includes a plurality of battery cells; and a module case that stores the plurality of battery cells therein and includes a case body that partially holds and supports the plurality of battery cells.

A filling space for filling the structural resin material may be formed in the case body.

The case body includes: a case bottom plate that partially accommodates the plurality of battery cells and abuts lower surfaces of the plurality of battery cells; a receiving step portion disposed on both sides of the case bottom plate, formed to be bent in multiple stages from the case bottom plate and protruding upward to partially accommodate the plurality of battery cells; And it may include a cell fixing tray that is formed to be recessed from the receiving step.

The case bottom plate, the receiving step, and the cell fixing tray may be formed integrally.

The module case includes a case front plate disposed in front of the case bottom plate and covering the front of the case main body; and a case rear plate disposed behind the case bottom plate and covering the rear of the case body.

The filling space is a closed space formed by the case bottom plate, the receiving step, the cell fixing tray, the case front plate, and the case rear plate, and the longitudinal cross section of the filling space may be provided in a closed loop shape. there is.

The cell fixing tray may be arranged in parallel with the case bottom plate and spaced apart by a predetermined distance.

The cell fixing tray may be provided with a plurality of insertion holes on the bottom surface into which the battery cells are inserted.

The plurality of battery cells may be press-fitted into the plurality of insertion holes.

In another embodiment, the plurality of insertion holes may be recessed outward in the radial direction along the circumference to provide an insert groove in which the structural resin material is interposed.

In another embodiment, one of the plurality of insertion holes may be provided with a step along the periphery that is recessed from the bottom surface of the cell fixing tray and detects the injection state of the structural resin material.

Additionally, according to the present invention, a battery pack including one or more of the above-described battery modules can be provided.

Additionally, according to the present invention, a vehicle including one or more of the above-described battery packs can be provided.

According to one aspect of the present invention, a cell fixing tray integrated into the module case is provided to hold and support the battery cells, and a structural resin material filled in the filling space of the module case can fix the battery cells. As a result, the cell frame, which is an existing separate component, can be deleted, ensuring the structural rigidity of the module case, while reducing the weight of the battery module and reducing production costs.

In addition, according to one aspect of the present invention, uniform injection of the structural resin material is possible through the continuously provided filling space inside the module case, so that the contact area between the battery cell and the structural resin material is sufficient to stably fix the battery cell. there is. In addition, the assembly process can be relatively simplified and the tact time can be reduced.

In addition, excellent cooling efficiency can be ensured by partially contacting the structural resin material for each battery cell.

Additionally, since the bottom of the battery cell can be placed in direct or indirect contact with the module case, heat management is relatively easy and cooling performance can be improved.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the invention described later, so the present invention includes the matters described in such drawings. It should not be interpreted as limited to only .
Figure 1 is an exploded perspective view of the main components of a typical conventional battery module.
Figure 2 is a combined perspective view of the main components of a battery module according to an embodiment of the present invention.
Figure 3 is an exploded perspective view of the main components of a battery module according to an embodiment of the present invention.
Figure 4 is an enlarged perspective view of a portion of the case body in the battery module according to an embodiment of the present invention.
Figure 5 is a longitudinal cross-sectional view of the case body in a battery module according to an embodiment of the present invention.
Figure 6 is a diagram showing a state in which battery cells are stored inside a case body and filled with a structural resin material in a battery module according to an embodiment of the present invention.
Figure 7 is a longitudinal cross-sectional view of the battery module of Figure 6.
Figure 8 is a top view of the case body in a battery module according to another embodiment of the present invention.
Figure 9 is a cross-sectional view of the periphery of the insertion hole of the case body in the battery module according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, the terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, and the inventor should appropriately define the concept of terms in order to explain his or her invention in the best way. It must be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle of definability.

Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only some of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so at the time of filing the present application, various options that can replace them are available. It should be understood that equivalents and variations may exist.

In the drawings, the size of each component or specific part constituting the component is exaggerated, omitted, or schematically shown for convenience and clarity of explanation. Therefore, the size of each component does not entirely reflect the actual size. If it is determined that specific descriptions of related known functions or configurations may unnecessarily obscure the gist of the present invention, such descriptions will be omitted.

Figure 2 is a combined perspective view of the main components of the battery module 10 according to an embodiment of the present invention, and Figure 3 is an exploded perspective view of the main components of the battery module 10 according to an embodiment of the present invention. am.

Referring to Figures 2 and 3, the battery module 10 according to an embodiment of the present invention includes a plurality of battery cells 200, the plurality of battery cells 200 are stored therein, and the plurality of battery cells 200 are stored in the battery module 10. It includes a module case 100 including a case body 101 that partially holds and supports the battery cell 200.

The plurality of battery cells 200 may be provided as secondary batteries, such as cylindrical secondary batteries, pouch-shaped secondary batteries, or prismatic secondary batteries. Hereinafter, in this embodiment, the description will be limited to the case where the plurality of battery cells 200 are provided as cylindrical secondary batteries as shown in FIG. 3. These battery cells 200 may be a plurality of cylindrical cells arranged in a horizontal direction and standing upright.

The module case 100 is a part that stores the plurality of battery cells therein. Additionally, the module case 100 may partially hold and support the battery cell 200. The module case 100 may include a case body 101 that accommodates a plurality of battery cells 200 and a case cover 180 that covers the top of the case body 101.

Referring mainly to FIG. 3, the case body 101 may have a longitudinal cross-sectional shape of an approximately U-shaped casing with the opening facing upward. And a hollow empty space may be provided inside. The empty space of the case body 101 may be formed as a filling space S in which the structural resin material 160 is filled.

That is, a portion of the case body 101 partially holds the battery cell 200, and a section of the battery cell 200 is used as a filling space (S2), which is an empty space inside the case body 101. ) can be arranged to accommodate. And the filling space (S) may be filled with a resin material 160 for fixing the battery cell 200. Accordingly, one (lower) section of the battery cell 200 accommodated in the charging space can be fixed using the structural resin material 160.

As will be described in detail later, the case body 101 includes a case bottom plate 110 in contact with the lower surface of the battery cell 200, and a cell fixing tray disposed at a predetermined distance apart and partially holding the battery cell 200. 130) can be provided. Here, the cell fixing tray 130 may be integrally formed as a part of the case body 101.

The case cover 180 is provided to cover the upper part of the case body 101 and may be provided to surround the upper area of the battery cell 200 stored in the case body 101.

Although not shown in the drawing, the bus bar assembly may be provided between the case cover 180 and the battery cells 200. The bus bar assembly is provided on one side of the plurality of battery cells 200 and may be electrically connected to the plurality of battery cells 200, and detailed description thereof will be omitted.

In addition, the module case 100 includes a case front plate 140 disposed in front of the case bottom plate 110 and covering the front of the case body 101; And it may include a case rear plate 150 that is disposed behind the case bottom plate 110 and covers the rear of the case body 101.

As shown in the drawing, the case front plate 140 may cover the front of the case body 101, and the case rear plate 150 may cover the rear of the case body 101. The case front plate 140 may cover and seal the filling space (S) exposed at the front in FIG. 4, and the same may apply to the filling space (S) at the rear.

In this way, a portion of the case body 101 is composed of a cell fixing tray 130 that holds the battery cell 200, and is provided to be integrated so that the cell frame 2, which is an existing separate part, is deleted, and the module case ( The structural rigidity of the battery module 100 can be secured, while the weight of the battery module 10 can be reduced and the production cost can be reduced.

In addition, the filling space (S) provided inside the module case 100 is filled with a structural resin material (160, see FIG. 6) to hold one section of the battery cell 200 accommodated inside the module case 100, thereby supporting the battery. The cell 200 can be stably fixed.

In addition, the structural rigidity of the module case 100 can be strengthened by filling the case body 101, which is provided as a single part, with the structural resin material 160.

Figure 4 is an enlarged perspective view of a portion of the case body in the battery module according to an embodiment of the present invention, and Figure 5 is a longitudinal cross-sectional view of the case body in the battery module according to an embodiment of the present invention.

Hereinafter, the module case 100 will be described in detail.

As shown in FIG. 1, in this embodiment, the battery module 10 easily holds the battery cell 200, while the module case 100, especially the case body 101 structure, can secure structural rigidity. begins.

Referring mainly to FIGS. 4 and 5, the case body 101 partially accommodates the battery cell 200, includes a case bottom plate 110 in contact with the lower surface of the battery cell 200, and a bottom of the case. A receiving step 120 disposed on both sides of the plate 110 and bent in multiple stages from the case bottom plate 110 and protruding upward to partially accommodate the battery cell 200, and the receiving step ( It may include a cell fixing tray 130 that is formed to be recessed from 120).

The case bottom plate 110 may be provided as a single plate-shaped plate. The case bottom plate 110 may form the lower plate of the module case 100. The upper surface of the case bottom plate 110 may be in contact with the lower part of the battery cell 200 that is placed upright. In this way, the bottom of the battery cell 200 can be placed in direct or indirect contact with the module case 100, so heat management can be relatively easy and cooling performance can be excellent. This case bottom plate 110 may form one side of the filling space S within the case body 101.

The receiving step portion 120 may be disposed on both sides of the case bottom plate 110. The receiving step portion 120 may be provided in pairs, one on each side with the case body 101 in between.

The receiving step 120 may be formed by bending a plate-shaped plate forming the case bottom plate 110 in multiple stages. That is, the plate-shaped plate is bent approximately vertically upward from both ends of the case bottom plate 110, protrudes to a predetermined height, and is again bent perpendicularly to the center of the case body 101, and is bent at a predetermined angle of the receiving step 120. After forming the thickness, it can be formed by bending downward again. In this way, by bending in multiple stages, a structure that protrudes upward to a predetermined height on both sides of the case bottom plate 110 and is hollow inside can be formed.

Here, the height of the receiving step 120 is formed to be relatively smaller than the size of the battery cell 200, and a predetermined height is formed so that the battery cell 200 stored in the module case 100 can be partially accommodated. It can be. The case cover 180 may be provided to cover the remaining portion of the battery cell 200.

In addition, the receiving step 120 has a predetermined thickness as shown in FIG. 5 and can form a filling space S therein. Due to this work space, it can serve to protect the stored battery cells 200 from external shock to a certain level. An injection hole 121 (see FIG. 6) into which the structural resin material 160 is injected may be formed on one side of the upper surface of the receiving step 120, which will be described later.

The cell fixing tray 130 refers to a flat plate that substantially holds the battery cell 200, and may be provided as an integrated structure with the case body 101. The cell fixing tray 130 may be provided as a part of the case body 101. The cell fixing tray 130 may be formed to be recessed from the upper surface of the receiving step 120. For this purpose, the cell fixing tray 130 is moved approximately vertically from the tip formed by the receiving step 120 (the point where the multi-stage bending forming of the receiving step 120 ends) to the center of the module case 100. It can be formed by bending.

Referring mainly to FIG. 5 , the cell fixing tray 130 may be arranged parallel to the case bottom plate 110. Additionally, the cell fixing tray 130 may be provided to be spaced apart from the case bottom plate 110 by a predetermined distance. Here, a charging space (S) is formed inside the spaced apart height, and one section of the battery cell 200 can be accommodated in the charging space (S).

The cell fixing tray 130 may be provided with a plurality of insertion holes 131 on the bottom surface into which the battery cells 200 are inserted. And the battery cell 200 can be inserted into the insertion hole 131 and accommodated in the case body 101. Accordingly, the battery cell 200 can be partially held within the module case 100, to be precise, the case body 101. This insertion hole 131 may be provided to be substantially the same as the outer diameter of the battery cell 200. The battery cell 200 may be press-fitted into the insertion hole 131. Accordingly, the battery cell 200 can be fixed to the cell fixing tray 130.

The case bottom plate 110, the receiving step 120, and the cell fixing tray 130 described above may be formed integrally. In this way, the cell fixing tray 130 integrated into the module case 100 is provided and a separate cell frame 2 that must be attached to the existing module case 100 is provided to hold and support the plurality of battery cells 200. Since parts such as the like can be deleted, the weight of the battery module 10 can be reduced and production costs can be reduced.

Through this configuration, the case body 101 has a hollow-type empty space formed inside, and the empty space can be filled with a structural resin material 160 (see FIG. 6) to form a filling space (S). . In addition, the battery cell 200 may be in contact with and fixed to the structural resin material 160 to the module case 100 for the section in which the battery cell 200 is inserted and stored.

Figure 6 is a diagram illustrating a state in which battery cells are stored inside the case body and filled with structural resin material in the battery module according to an embodiment of the present invention, and Figure 7 is a longitudinal cross-sectional view of the battery module of Figure 6.

In the case body 101, a filling space S may be formed for filling the structural resin material 160. Referring mainly to FIG. 6, the filling space S includes the case bottom plate 110, the receiving step 120, the cell fixing tray 130, the case front plate 140, and the case rear plate. It can refer to the closed space formed by (150). In addition, the longitudinal cross-section of the filling space S may be provided in a closed loop shape, as shown in FIGS. 4 and 5. The closed loop shape may be approximately a ‘U’ shape with the opening facing upward.

Referring mainly to FIG. 6 , the filling space S may be filled with a structural resin material 160. The structural resin material 160 may be filled in the space between the case bottom plate 110 and the cell fixing tray 130 and the inner space of the receiving step 120. The structural resin material 160 may function to reinforce the structural rigidity of the case body 101. For example, the structural resin material 160 may be silicone, urethane, epoxy, etc. Meanwhile, this structural resin material 160 not only contributes to structural rigidity but also can perform a cooling function. The structural resin material 160 can also perform the function of promoting heat transfer.

The structural resin material 160 of this configuration can be filled in the filling space S and fix the battery cell 200 stored in the module case 100. That is, as shown in FIG. 7, the battery cell 200 is inserted into the insertion hole 131 of the cell fixing tray 130, and the lower section of the battery cell 200 is stored in the case body 101, The stored portion may be fixed by the structural resin material 160. In particular, an adhesive member 170 may be interposed between the lower surface of the battery cell 200 and the case bottom plate 110. The adhesive member 170 has adhesive layers on both sides so that the battery cell 200 and the case body 101 can be coupled to each other. Meanwhile, FIG. 7 shows a state in which the adhesive member 170 is interposed, but differently, the bottom of the battery cell 200 and the case bottom plate 110 may be configured to be in direct contact. In this case, cooling efficiency may be relatively superior.

Additionally, the filling space S inside the module case 100 may be continuously provided. In more detail, an injection hole 121 is provided on one side of the receiving step 120, and the filling space S has a closed loop cross-section as shown in FIG. 7, while the length of the battery module 10 The filling space S may be provided continuously in the direction (-X axis direction in FIG. 3). Accordingly, the structural resin material 160 injected into the injection hole 121 can be uniformly injected through the continuous filling space (S). Therefore, the contact area between the battery cell 200 and the structural resin material 160 can be secured sufficiently and uniformly, so that the battery cell 200 can be stably fixed.

A cell fixing tray 130 integrated into the module case 100 is provided to hold the battery cell 200, and the structural resin material 160 filled in the filling space S of the module case 100 holds the battery cell 200. can be fixed. As a result, even though the cell frame 2, which is an existing separate component, is deleted, the structural rigidity of the module case 100 can be secured, while the weight of the battery module 10 and production costs can be reduced. In addition, structural rigidity can be strengthened by filling the case body 101, which is provided as a single part, with a structural resin material 160.

In addition, according to one aspect of the present invention, uniform injection of the structural resin material 160 is possible through the continuously provided filling space (S) inside the module case 100, thereby forming the battery cell 200 and the structural resin material ( 160), the contact area between them is sufficient so that the battery cell 200 can be stably fixed. In addition, the assembly process can be relatively simplified and the tact time can be reduced.

In addition, the structural resin material 160 is partially in face-to-face contact with each battery cell 200, thereby ensuring excellent cooling efficiency.

In addition, although not shown in the drawing, a cooling unit attached to the bottom of the module case may be additionally provided, and the cooling unit and the lower surface of the battery cell 200 may be placed in direct or indirect contact with the module case 100 to generate heat. Management is relatively easy and cooling performance can be improved.

Next, other embodiments of the battery module 10 of the present invention will be briefly described with reference to FIGS. 8 and 9.

Figure 8 is a top view of the case body 101 in a battery module according to another embodiment of the present invention.

The same reference numbers as in the previous drawings indicate the same members, and redundant descriptions of the same members will be omitted and the description will focus on the differences from the above-described embodiment.

As shown in FIG. 5, the case body 101 includes a case bottom plate 110, a receiving step 120, and the cell fixing tray 130, and the cell fixing tray 130 is attached to the bottom surface. The configuration in which a plurality of insertion holes 131 into which the battery cells 200 are inserted can be provided is the same as the above-described embodiment. Additionally, the configuration in which the battery cell 200 is press-fitted into the insertion hole 131 may be the same.

Referring to FIG. 8, the at least one insertion hole 131 provided in the cell fixing tray 130 in this embodiment may be provided with an insert groove 132 along the circumference. The insert groove 132 may be formed to be recessed outward in the radial direction of the insertion hole 131. This insert groove 132 may be provided with the structural resin material 160 interposed therebetween.

The insert groove 132 may be provided with an exposed portion 133 that is recessed outward in the radial direction on the outer surface of the insertion hole 131. That is, the inner diameter D1 of the insertion hole 131 may be provided to fit snugly into the outer diameter of the battery cell, and the inner diameter D2 of the insert groove 132 may be relatively larger than the inner diameter D1. Here, the exposed portion 133 communicates with the cell fixing tray 130 in the thickness direction.

With this configuration, when the case body 101 is filled with the structural resin material 160, a portion of the structural resin material 160 may be exposed as the exposed portion 133. Accordingly, the area where the structural resin material 160 is interposed at the coupling portion between the battery cell 200 and the insertion hole 131 can be relatively increased compared to the previous embodiment, so that the battery cell on the module case 100 (200) can be fixed more stably.

Figure 9 is a cross-sectional view of the periphery of the insertion hole 131 of the case body 101 in the battery module 10 according to another embodiment of the present invention.

In another embodiment, referring mainly to FIG. 9, in one of the insertion holes 131, the structural resin material 160 is injected by being depressed in the bottom surface of the cell fixing tray 130 along the circumference. A step portion 135 may be provided to grasp the.

The step portion 135 may function as an indicator that determines the injection level when the structural resin material 160 is injected into the case body 101. For example, a step portion 135 may be provided in one of the insertion holes 131 disposed on the opposite side of the case body 101, far away from the injection hole 121. The inner diameter D2 formed by the step portion 135 may be relatively larger than the inner diameter D1 of the insertion hole. It is possible to check at a glance whether the structural resin material 160 is filled in the filling space (S) inside the case body 101 below the insertion hole 131. For example, when the structural resin material 160 is injected into the case body 101, the structural resin material 160 flows out between the battery cells 200 coupled to the cell fixing tray 130 and the stepped portion 135 on the upper surface. It may be easy to determine the degree to which the structural resin material 160 has been injected into the case body 101 by determining whether the exposed portion 136 is filled with the structural resin material 160.

This step portion 135 is similar to the insert groove 132 of the previous embodiment in that it forms exposed portions 133 and 136 through which the structural resin material 160 is exposed, in terms of functionality for checking the injection amount, etc., but in this embodiment The step portion 135 in the example is different in that a separate communication path is not formed in the thickness direction of the cell fixing tray 130.

Meanwhile, a battery pack (not shown) according to the present invention may include one or more of the battery modules 10 described above. The battery pack according to the present invention may further include a master BMS (Battery Management System) for integrated control of charging and discharging of one or more battery modules 10, a current sensor, a fuse, etc., and a pack case for accommodating the above-described components. there is.

The battery pack according to the present invention may be applied to an energy storage device or to a vehicle such as an electric scooter, electric vehicle, or hybrid vehicle.

The battery pack according to the present invention can be applied to automobiles such as electric vehicles or hybrid vehicles. That is, the vehicle according to the present invention may include the battery pack according to the present invention. The battery pack may be installed in the car body frame or trunk space under the vehicle seat, and the arrangement order of the battery pack may be reversed as needed when installed in the vehicle.

As described above, although the present invention has been described with limited examples and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following will be understood by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalence of the patent claims to be described.

Meanwhile, when terms indicating directions such as up, down, left, right, front, and back are used in this specification, these terms are only for convenience of explanation, and may vary depending on the location of the object or the location of the observer, etc. It is obvious to those skilled in the art that changes may occur.

10: Battery module
100: module case 101: case body
110: case bottom plate 120: receiving step portion
121: injection hole 130: cell fixing tray
131: Insertion hole 132: Insert groove
133, 136: exposed portion 135: stepped portion
140: Case front plate 150: Case rear plate
S: Filling space 160: Structural resin material
170: Adhesive member 180: Case cover
200: battery cell

Claims (13)

a plurality of battery cells; and
A module case that stores the plurality of battery cells therein and includes a case body that partially holds and supports the plurality of battery cells.
A battery module comprising: According to paragraph 1,
In the case body,,
A battery module characterized in that a filling space is formed for filling the structural resin material. According to paragraph 2,
The case body is,
a case bottom plate that partially accommodates the plurality of battery cells and abuts lower surfaces of the plurality of battery cells;
a receiving step portion disposed on both sides of the case bottom plate, formed to be bent in multiple stages from the case bottom plate, and protruding upward to partially accommodate the plurality of battery cells; and
A battery module comprising a cell fixing tray that is recessed from the receiving step. According to paragraph 3,
The battery module, wherein the case bottom plate, the receiving step, and the cell fixing tray are integrally formed. According to paragraph 3,
The module case is,
a case front plate disposed in front of the case bottom plate and covering the front of the case body; and
A battery module comprising a case rear plate disposed behind the case bottom plate and covering the rear of the case body. According to clause 5,
The filling space is a closed space formed by the case bottom plate, the receiving step, the cell fixing tray, the case front plate, and the case rear plate,
A battery module, characterized in that the longitudinal cross-section of the filling space is provided in a closed loop shape. According to paragraph 3,
The battery module is characterized in that the cell fixing tray is arranged in parallel with the case bottom plate and spaced apart by a predetermined distance. According to paragraph 3,
The battery module is characterized in that the cell fixing tray is provided with a plurality of insertion holes on the bottom surface into which the battery cells are inserted. According to clause 8,
A battery module, wherein the plurality of battery cells are press-fitted into the plurality of insertion holes. According to clause 8,
A battery module, wherein the plurality of insertion holes are recessed radially outward along the circumference to provide an insert groove in which the structural resin material is interposed. According to clause 8,
A battery module, wherein any one of the plurality of insertion holes is provided with a step along the circumference of the bottom surface of the cell fixing tray to determine the injection state of the structural resin material. A battery pack comprising the battery module according to any one of claims 1 to 11. A motor vehicle comprising a battery pack according to claim 12.

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