Battery module

Abstract

The present invention relates to a battery module including an end plate that can increase the efficiency of the process by simplifying the assembly process of the battery module and reducing the manufacturing cost since a separate part for accommodating a connector is not required, and can improve the quality and stability of the product by suppressing the movement of the connector and wires and preventing the insertion of foreign objects during shipping of the battery module. The battery module according to the present invention includes a cell stack in which a plurality of cells are stacked, a frame in which the cell stack is accommodated, end plates that close the opening of the frame and are arranged on one side and the other side of the cell stack, a connector that is arranged on the outside of the frame and electrically connects the cell stack to the outside, and wires that connect the cell stack to the connector, and the end plate can have a connector accommodating groove in which the connector can be accommodated on one side adjacent to the cell stack and the other side opposite to the one side.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0015839, filed on February 7, 2022, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a battery module, and more particularly to a battery module for a secondary battery. [Background technology]

[0003] In recent years, with the depletion of fossil fuels causing rising energy costs and increasing concerns about environmental pollution, the demand for environmentally friendly alternative energy sources has become an essential factor for future life. As a result, research into various electricity production technologies such as solar, wind, and tidal power has continued, and there has also been great interest in power storage devices such as batteries to more efficiently use the electrical energy produced in this way.

[0004] Furthermore, with the increasing technological development and demand for battery-based electronic mobile devices and electric vehicles, the demand for batteries as an energy source is rapidly increasing, and as a result, much research is being conducted on batteries that can meet various demands.

[0005] Generally, batteries that store electrical energy can be divided into primary batteries and secondary batteries. While primary batteries are disposable, secondary batteries are rechargeable batteries made using materials that can undergo repeated oxidation and reduction processes between electric current and materials. In other words, when an electric current causes a reduction reaction on a material, the power source is charged, and when an oxidation reaction on the material occurs, the power source is discharged. Electricity is generated by repeating this charge-discharge cycle.

[0006] Secondary batteries are used as an energy source for various electronic devices, which have become indispensable in modern society. The demand for capacity is increasing due to the increasing use and complexity of mobile devices and the development of electric vehicles, etc. To meet user demand, small devices are equipped with multiple cells, while automobiles and other devices use battery modules that electrically connect multiple cells or battery packs equipped with multiple such battery modules.

[0007] Meanwhile, when constructing a battery pack by connecting multiple cells in series / parallel, a common method is to first construct a battery module consisting of at least one cell, and then use this at least one battery module to construct a battery pack by adding other components. Here, the battery module includes a cell stack in which multiple cells are stacked, a frame that houses the cell stack, and end plates that cover the front and rear surfaces of the cell stack.

[0008] In the past, a separate part was used to protect the connectors protruding from the end plates of battery modules from external factors, which reduced process efficiency and increased costs for the separate part, as well as causing problems such as excessive wire movement during battery module transportation. To solve these problems, a battery module including end plates with other configurations is needed. Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been devised to solve the above problems, and an object of the present invention is to provide a battery module including end plates that can increase process efficiency by eliminating a separate part for accommodating a connector, thereby simplifying the battery module assembly process and reducing manufacturing costs, and that can improve product quality and stability by suppressing looseness of connectors and wires and preventing the insertion of foreign objects during shipping of the battery module. [Means for solving the problem]

[0010] The battery module according to the present invention includes a cell stack in which a plurality of cells are stacked, a frame in which the cell stack is housed, end plates that close the opening of the frame and are disposed on one side and the other side of the cell stack, connectors that are disposed on the outside of the frame and for electrically connecting the cell stack to the outside, and wires that connect the cell stack to the connectors, and the end plates may have connector housing grooves formed on one side adjacent to the cell stack and the other side opposite to the one side in which the connectors can be housed.

[0011] The end plates may include ribs extending therefrom away from the cell stack to define connector receiving grooves. The ribs may have rounded edges. The ribs may be made of a resilient material.

[0012] The end plate may have a connector receiving groove formed in a recessed shape corresponding to the shape of the connector. The end plate may have a plurality of connector receiving grooves formed therein, and the plurality of connector receiving grooves may be formed adjacent to each other in a line.

[0013] The end plate may further have a wire receiving groove formed on one surface adjacent to the cell stack and the other surface opposite to the one surface, for receiving wires. The end plate may be formed so that the connector receiving groove and the wire receiving groove are connected to each other.

[0014] The end plate may have a connector receiving groove formed therein so that the connector can be received with one surface of the connector connected to one end of the wire facing away from the cell stack.

[0015] The end plate may have a connector receiving groove formed therein so that one surface of the connector connected to one end of the wire faces the other end of the wire. The end plates may further include receiving plates extending perpendicularly away from the cell stack to protect portions of the inserted connectors. [Effects of the Invention]

[0016] The battery module according to the present invention includes a cell stack in which a plurality of cells are stacked, a frame in which the cell stack is housed, end plates that close the opening of the frame and are disposed on one side and the other side of the cell stack, connectors that are disposed on the outside of the frame and for electrically connecting the cell stack to the outside, and wires that connect the cell stack to the connectors, and the end plates may have connector housing grooves formed on one side adjacent to the cell stack and the other side opposite to the one side in which the connectors can be housed.

[0017] As a result, the present invention provides a battery module including end plates that can improve product quality and stability by eliminating the need for a separate part to accommodate the connector, simplifying the battery module assembly process and reducing manufacturing costs, and thereby increasing process efficiency, and by suppressing looseness of the connectors and wires and preventing the insertion of foreign objects during shipping of the battery module. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view schematically showing a battery module according to a first embodiment of the present invention. [Figure 2] 1 is an enlarged view schematically showing a battery module according to a first embodiment of the present invention. [Figure 3] 1 is a perspective view schematically showing an end plate of a battery module according to a first embodiment of the present invention. [Figure 4] 1 is a perspective view schematically showing an end plate in which a connector of a battery module according to a first embodiment of the present invention is housed. FIG. [Figure 5] FIG. 10 is a perspective view schematically illustrating an end plate in which connectors and wires of a battery module according to a second embodiment of the present invention are housed. DETAILED DESCRIPTION OF THE INVENTION

[0019] The present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily understand and practice the preferred embodiments of the present invention. However, the present invention may be embodied in various different forms and is not limited to the following embodiments.

[0020] In order to clearly explain the present invention, detailed descriptions of parts that are not relevant to the explanation or related known technologies that may unnecessarily obscure the gist of the present invention will be omitted, and in this specification, when assigning reference symbols to components in each drawing, the same or similar reference symbols will be assigned to the same or similar components throughout the specification.

[0021] Furthermore, the terms and words used in this specification and claims should not be interpreted in a limited way to their ordinary or dictionary meanings, but should be interpreted in a way that is consistent with the technical idea of ​​the present invention, based on the principle that inventors can appropriately define the concepts of terms in order to best explain their inventions.

[0022] First embodiment The present invention provides a battery module as a first embodiment. FIG. 1 is a perspective view schematically showing a battery module 100 according to a first embodiment of the present invention, and FIG. 2 is an enlarged view schematically showing the battery module 100 according to the first embodiment of the present invention.

[0023] 1 and 2, a battery module 100 according to a first embodiment of the present invention may include a cell stack 140, a frame 150, end plates 110a and 110b, a connector 120, and a wire 130. Specifically, the cell stack 140 may be disposed inside the frame 150, and the end plates 110a and 110b may be disposed to close an opening of the frame 150. In addition, the connector 120 and the cell stack 140 may be connected to each other via a wire.

[0024] The cell stack 140 may be formed by stacking a specific number of cells in parallel. A cell is a basic unit of a battery that can be used by charging and discharging electrical energy, and may include a positive electrode, a negative electrode, a separator, etc. Although not specifically mentioned in the present invention, bus bars that can electrically connect electrode leads of the cells may be arranged on both sides of the cell stack 140.

[0025] As an example of a configuration for accommodating the cell stack 140, the battery module 100 according to the first embodiment of the present invention can include a frame 150. The frame 150 can accommodate the cell stack 140 therein, and the shape of the frame 150 can vary depending on the size and shape of the accommodated cell stack 140. Among the various shapes, the frame 150 according to the first embodiment of the present invention can have a U-shape that can surround three sides of the cell stack 140. However, the shape of the frame 150 is not limited thereto. The frame 150 can protect the cell stack 140 from the outside and maintain a constant shape.

[0026] As an example of a configuration for closing the opening of the frame 150, the battery module 100 according to the first embodiment of the present invention can include end plates 110a and 110b.

[0027] As described above, when the cell stack 140 is housed in the U-shaped frame 150, two sides of the cell stack 140, excluding the top surface, are not enclosed by the frame 150 due to the opening in the frame 150. That is, end plates 110a and 110b can be disposed on one side and the other side of the cell stack 140 that are not enclosed by the frame 150, respectively. The end plates 110a and 110b will be described in detail later.

[0028] The battery module 100 according to the first embodiment of the present invention may include a connector 120 as an example of a configuration for connecting electrical energy of the cell stack 140 to the outside.

[0029] The connector 120 may be disposed on the outside of the frame 150 so as to be connected to the outside. The connector 120 may generally have a rectangular parallelepiped shape, but is not limited thereto, and any shape necessary for connection to the outside will suffice.

[0030] As an example of a configuration for connecting the cell stack 140 and the connector 120 to each other, the battery module 100 according to the first embodiment of the present invention may include a wire 130 .

[0031] The wire 130 may include an electric wire capable of transmitting electrical energy therein and may be surrounded by an insulating material on the outside. Also, the wire 130 may generally have a long cylindrical shape, but is not necessarily limited thereto.

[0032] FIG. 3 is a perspective view schematically illustrating an end plate 110a of a battery module 100 according to the first embodiment of the present invention, and FIG. 4 is a perspective view schematically illustrating an end plate 110a accommodating a connector 120 of a battery module 100 according to the first embodiment of the present invention.

[0033] Referring to Figures 3 and 4, as an example of a configuration for accommodating a connector 120 that protrudes outside the frame 150 and is arranged outside the frame 150, connector accommodating grooves 111a, 111b may be formed in the end plates 110a, 110b of the battery module 100 according to the first embodiment of the present invention.

[0034] The connector receiving grooves 111a and 111b are spaces capable of receiving the connector 120. The end plates 110a and 110b may be recessed or may have ribs protruding outward to form the spaces capable of receiving the connector 120.

[0035] The connector receiving grooves 111a, 111b may be formed in the end plates 110a, 110b in the same number as the number of connectors 120 included in the battery module 100. However, multiple connector receiving grooves 111a, 111b may be formed so as to be applicable to various battery modules 100 having different numbers of connectors 120.

[0036] The connector receiving grooves 111a and 111b may be formed in a shape that allows the entire connector 120 to be inserted and accommodated therein, or may be formed in a shape that allows the connector 120 to be accommodated in a partially inserted state. When accommodating the connector 120 in a partially inserted state, the connector receiving grooves 111a and 111b may be formed to have a volume that is smaller than the volume of the connector 120.

[0037] As an example of a form for forming the connector receiving grooves 111a, 111b, the end plates 110a, 110b of the battery module 100 according to the first embodiment of the present invention may include ribs 112.

[0038] The ribs 112 may extend from the end plates 110a, 110b in a direction away from the cell stack 140 so as to form the connector receiving grooves 111a, 111b. Because the ribs 112 extend in a direction away from the cell stack 140, the surfaces of the end plates 110a, 110b facing the cell stack 140 have a relatively simple structure and can be formed as flat surfaces. This improves the structural stability of the battery module 100 as a whole.

[0039] The rib 112 may be formed in the shape of a plurality of protruding thin plates, and the shape of the rib 112 may vary depending on the shape and number of the connector receiving grooves 111a, 111b. However, there is no limitation on the shape of the rib 112, and it is sufficient if the shape can form the connector receiving grooves 111a, 111b.

[0040] 3, the rib 112 may have rounded edges. All edges of the rib 112 may be rounded, or only edges of the rib 112 that form spaces such as the connector receiving grooves 111a and 111b in which the connector 120 is received may be rounded.

[0041] If the edges of the ribs 112 are rounded, the possibility of damage occurring when the connector 120 and the wire 130 collide with the ribs 112 can be reduced, and this is structurally advantageous for inserting the connector 120 .

[0042] As an example of a configuration that is advantageous for accommodating the connector 120 and the like, the ribs 112 included in the end plates 110a of the battery module 100 according to the first embodiment of the present invention may be made of an elastic material.

[0043] If the ribs 112 of the end plates 110a, 110b are made of an elastic material, the shape of the ribs 112 can be deformed when the connectors 120 are inserted to be accommodated in the connector accommodating grooves 111a, 111b, facilitating the insertion of the connectors 120. Furthermore, the elastic ribs 112 have the property of returning to their original shape after being deformed, and can therefore apply pressure to a portion of the connectors 120 inserted into the connector accommodating grooves 111a, 111b. Therefore, by applying pressure to the portion of the connectors 120 inserted into the connector accommodating grooves 111a, 111b, the connectors 120 can be maintained stably accommodated in the connector accommodating grooves 111a, 111b even when the battery module 100 is transported, for example.

[0044] As an example of a configuration that is advantageous for inserting the connector 120 into the connector accommodating grooves 111a, 111b, the end plates 110a, 110b of the battery module 100 according to the first embodiment of the present invention may be formed so that the connector accommodating grooves 111a, 111b are recessed in a shape that corresponds to the shape of the connector 120.

[0045] Specifically, the connector receiving grooves 111 a and 111 b may have a recessed shape so that the inner surfaces of the connector receiving grooves 111 a and 111 b correspond to the outer surface of the connector 120 .

[0046] If the recessed shape of connector accommodating grooves 111a, 111b corresponds to the shape of connector 120, connector 120 can be easily inserted into connector accommodating grooves 111a, 111b. Furthermore, if connector accommodating grooves 111a, 111b are formed so that there is almost no space between connector 120 and ribs 112 that form connector accommodating grooves 111a, 111b when connector 120 is inserted into connector accommodating grooves 111a, 111b, connector 120 will not be easily removed while housed in connector accommodating grooves 111a, 111b, which is advantageous for housing connector 120.

[0047] As an example of a configuration that makes it easy to accommodate multiple connectors 120, the end plates 110a, 110b of the battery module 100 according to the first embodiment of the present invention may have multiple connector accommodating grooves 111a, 111b formed adjacent to each other in a line.

[0048] The battery module 100 may include a plurality of connectors 120, the number of which may vary. When the battery module 100 includes a plurality of connectors 120, a plurality of connector receiving grooves 111a, 111b may be formed in the end plates 110a, 110b to accommodate all of the plurality of connectors 120.

[0049] The connector receiving grooves 111a, 111b may be formed in various shapes in the end plates 110a, 110b. For example, the connector receiving grooves 111a, 111b may be formed adjacent to each other.

[0050] 4, when the battery module 100 includes two connectors 120 at one end, the end plate 110a may have two connector receiving grooves 111a and 111b formed at one end. In this case, the two connector receiving grooves 111a and 111b may be formed adjacent to each other in the vertical direction on the surface of the end plate 110a.

[0051] When the connector receiving grooves 111a, 111b are formed adjacent to each other, the wires 130 connected to the respective connectors 120 can be formed so that there is not a large difference in length between them, which makes the process efficient, and when the connectors 120 are received in the connector receiving grooves 111a, 111b, the wires 130 can be stably fixed, which reduces the movement of the wires 130. As a result, when the battery module 100 is transported, the connectors 120 and the wires 130 can be maintained in a relatively stable state.

[0052] The connector 120 may be inserted into the connector receiving grooves 111a, 111b in various ways, including the direction in which the connector 120 is inserted. Among the various ways in which the connector 120 is inserted, the connector 120 may be inserted into the end plates 110a, 110b of the battery module 100 according to the first embodiment of the present invention such that one side of the connector 120, to which one end of the wire 130 is connected, faces away from the cell stack 140.

[0053] When the connector 120 is inserted into the connector accommodating grooves 111a, 111b in the above-described manner, the connector accommodating grooves 111a, 111b can be formed so that the connector 120 can be accommodated so that one side of the connector 120 to which one end of the wire 130 is connected faces away from the cell stack 140.

[0054] 4, the direction in which the connector 120 is inserted to be accommodated in the connector receiving grooves 111a, 111b is the same as the direction in which the connector 120 gradually approaches the cell stack 140, and the connector 120 can be inserted into the connector receiving grooves 111a, 111b while moving in this direction. Therefore, after the connector 120 is inserted into the connector receiving grooves 111a, 111b, the connector 120 can be accommodated in the connector receiving grooves 111a, 111b with one side of the connector 120 to which one end of the wire 130 is connected facing away from the cell stack 140.

[0055] When the connector 120 is accommodated in the connector accommodating grooves 111a, 111b in this manner, the connector 120 is easy to handle when an operator inserts the connector 120 into the connector accommodating grooves 111a, 111b or removes the connector 120 from the connector accommodating grooves 111a, 111b.

[0056] In the battery module 100 according to the first embodiment of the present invention, connector receiving grooves 111a, 111b for receiving the connector 120 are formed in the end plates 110a, 110b, eliminating the need for a separate component for receiving the connector 120. This simplifies the assembly process of the battery module 100, reduces manufacturing costs, and increases process efficiency. It also reduces play in the connector 120 and the wire 130 and prevents foreign objects from being inserted during shipping of the battery module 100, thereby improving product quality and stability.

[0057] Second embodiment The present invention provides another type of battery module as a second embodiment. Hereinafter, detailed description of the same configuration as the battery module 100 according to the first embodiment of the present invention will be omitted.

[0058] FIG. 5 is a perspective view schematically illustrating an end plate 210 that houses the connector 120 and the wire 130 of a battery module 200 according to the second embodiment of the present invention.

[0059] The battery module 200 according to the second embodiment of the present invention may include a cell stack 140, a frame 150, an end plate 210, a connector 120, and a wire 130. Specifically, the cell stack 140 may be disposed inside the frame 150, and the end plate 210 may be disposed to close an opening of the frame 150. In addition, the connector 120 and the cell stack 140 may be connected to each other via a wire.

[0060] Among the various insertion forms for accommodating the connector 120, one example of a configuration that can stably accommodate the connector 120 is that of accommodating the connector 120 so that one side of the connector 120, to which one end of the wire 130 is connected, faces the other end of the wire 130 in the end plate 210 of the battery module 200 according to the second embodiment of the present invention.

[0061] When the connector 120 is inserted into the connector receiving groove in the above-described manner, the connector receiving groove may be formed so that the connector 120 can be received with one side of the connector 120 connected to one end of the wire 130 facing the other end of the wire 130.

[0062] For example, when the end plate 210 is viewed from the front, the wire 130 extending from the left side to the right side may be connected to the connector 120. In this case, the fact that one side of the connector 120 to which one end of the wire 130 is connected faces the other end of the wire 130 is the same as the fact that it faces the left side.

[0063] When the connector 120 is received in the connector receiving groove in this manner, the direction in which the wire 130 extends and the direction in which the connector 120 is inserted are the same, so that the connector 120 can be received relatively stably.

[0064] As an example of a configuration that assists in stable accommodation of the connector 120 when the connector 120 is accommodated so that one side of the connector 120 to which one end of the wire 130 is connected faces the other end of the wire 130, the end plate 210 of the battery module 200 according to the second embodiment of the present invention may further include an accommodation plate 213.

[0065] The receiving plate 213 extends perpendicular to the direction away from the cell stack 140 and can protect a part of the inserted connector 120. Specifically, the receiving plate 213 can be arranged in parallel with the end plate 210.

[0066] The accommodating plate 213 can be arranged so as to contact a portion of the rib 212 that forms the connector accommodating groove, and the connector 120 in the accommodated state can be partially shielded by the accommodating plate 213. In other words, the connector 120 in the accommodated state in the connector accommodating groove can be in contact with the rib 212 and the accommodating plate 213 on all four sides. The connector 120 can be stably accommodated in the connector accommodating groove by the accommodating plate 213 and can be protected from the outside.

[0067] The battery module 200 of the present invention may include a connector 120 and a wire 130 as components disposed outside the frame 150. As an example of a configuration for accommodating the wire 130 in the components disposed outside the frame 150, the end plate 210 of the battery module 200 according to the second embodiment of the present invention may further be formed with a wire accommodating groove 214.

[0068] The wire receiving grooves 214 may be formed on the same surface as the surface on which the connector receiving grooves are formed in the end plate 210. Specifically, the wire receiving grooves 214 may be formed on one surface of the end plate 210 adjacent to the cell stack 140 and the other surface opposite to the other surface to receive the wires 130.

[0069] The wire receiving groove 214 is a space capable of receiving the wire 130. The end plate 210 may have a recessed shape or a rib 212 protruding outward to form the space capable of receiving the wire 130.

[0070] The wire receiving grooves 214 may be formed in the end plate 210 in the same number as the wires 130 included in the battery module 100. However, as shown in Fig. 5, the wires 130 may have a shape in which the middle portions thereof are joined together. That is, one end and the other end of the wires 130 may be separated into a plurality of portions according to the number of connectors 120, but a specific portion in the middle of the wires 130 may be joined together to form a single cylindrical shape. In this case, only one wire receiving groove 214 may be formed on the other surface of the end plate 210.

[0071] When the wire accommodating grooves 214 are formed in the end plates 210, not only the connectors 120 but also the wires 130 are accommodated therein, thereby preventing the wires 130 from moving freely when the battery module 200 is transported. This has the effect of increasing the stability of the battery module 200.

[0072] As an example of a configuration for stably accommodating the connector 120 and the wire 130, the battery module 200 according to the second embodiment of the present invention can be formed so that the connector accommodating groove and the wire accommodating groove 214 are connected to each other.

[0073] Specifically, an additional opening may be formed in the common rib 212 that simultaneously forms the connector receiving groove and the wire receiving groove 214 so that the wire 130 can be received therein, and the connector receiving groove and the wire receiving groove 214 may be formed to be connected to each other. That is, a portion of the wire 130, including one end of the wire 130 connected to one side of the connector 120, may be further fixed by the opening formed in the rib 212.

[0074] When the connector receiving groove and the wire receiving groove 214 are formed to be connected to each other, the connector 120 and the wire 130 can be more stably received, and therefore, when the battery module 100 is transported for shipping, the connector 120 and the wire 130 are stably fixed, which increases the stability of the product. In addition, the manner in which the connector 120 and the wire 130 are received is also relatively stable.

[0075] Although the present invention has been described above using limited embodiments and drawings, the present invention is not limited thereto, and various implementations are possible within the scope equivalent to the technical concept of the present invention and the claims set forth below by a person having ordinary skill in the art to which the present invention pertains. [Explanation of symbols]

[0076] 100: Module 110a, 110b, 210: End plates 111a, 111b: Connector receiving groove 112, 212: Ribs 120: Connector 130: Wire 140: Cell stack 150: Frame 213: Storage board 214: Wire storage groove

Claims

1. a cell stack in which a plurality of cells are stacked; a frame in which the cell stack is housed; end plates that close the openings of the frame and are disposed on one and the other surfaces of the cell stack; a connector disposed outside the frame for electrically connecting the cell stack to the outside; a wire connecting the cell stack and the connector; Including, The end plate is a connector receiving groove capable of receiving the connector is formed on the other surface opposite to the one surface adjacent to the cell stack; The connector receiving groove is recessed into a shape corresponding to the shape of the connector, and four surfaces of the connector contact ribs that form the connector receiving groove. a connector receiving groove formed in the connector receiving portion so that one surface of the connector to which one end of the wire is connected faces away from the cell stack;

2. The end plate is The battery module according to claim 1 , further comprising a rib extending from the end plate in a direction away from the cell stack so as to form the connector receiving groove.

3. The rib is 3. The battery module according to claim 2, wherein the edges are rounded.

4. The rib is The battery module according to claim 2, wherein the battery module is made of an elastic material.

5. A cell stack in which a plurality of cells are stacked; a frame in which the cell stack is housed; end plates that close the openings of the frame and are disposed on one and the other surfaces of the cell stack; a connector disposed outside the frame for electrically connecting the cell stack to the outside; a wire connecting the cell stack and the connector; Including, The end plate is a connector receiving groove capable of receiving the connector is formed on the other surface opposite to the one surface adjacent to the cell stack; The end plate is The battery module is characterized in that a plurality of the connector receiving grooves are formed, and the plurality of connector receiving grooves are formed adjacent to each other in a line.

6. The end plate is The battery module of claim 1 , further comprising a wire receiving groove formed on one surface of the battery module opposite to the surface adjacent to the cell stack, the wire receiving groove being capable of receiving the wire.

7. The end plate is The battery module according to claim 6, wherein the connector receiving groove and the wire receiving groove are formed so as to be connected to each other.

8. The end plate is 2. The battery module according to claim 1, wherein the connector receiving groove is formed so that one surface of the connector connected to one end of the wire faces the other end of the wire.

9. A cell stack in which a plurality of cells are stacked; a frame in which the cell stack is housed; end plates that close the openings of the frame and are disposed on one and the other surfaces of the cell stack; a connector disposed outside the frame for electrically connecting the cell stack to the outside; a wire connecting the cell stack and the connector; Including, The end plate is a connector receiving groove capable of receiving the connector is formed on the other surface opposite to the one surface adjacent to the cell stack; The end plate is The connector receiving groove is formed so that one surface of the connector connected to one end of the wire faces the other end of the wire, The end plate is The battery module further includes a receiving plate extending perpendicular to a direction away from the cell stack and protecting a portion of the inserted connector.

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