Battery module

Abstract

A battery module according to an embodiment of the present disclosure may include: a case forming an appearance; a battery cell accommodated inside the case; a circuit unit located between an inner surface of the case and the battery cell, and connected with the battery cell to transmit and receive an electrical signal; a temperature measurement unit which is located on one surface of the circuit unit facing the battery cells, measures the temperature of the battery cells to transmit temperature information to the circuit unit, and is spaced apart from the battery cells at a prescribed interval; and a holding portion between the battery cell and the circuit unit.

Description

Technical Field

[0001] This application claims priority from Korean Patent Application No. 10-2023-0035483 filed on March 17, 2023, and Korean Patent Application No. 10-2024-0036035 filed on March 14, 2024, both filed in Korea, the disclosures of which are incorporated herein by reference.

[0002] The present disclosure relates to a battery module having an improved structure of a portion for measuring the temperature of a battery cell. Background Art

[0003] Generally, secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion batteries, and lithium-ion polymer batteries. These secondary batteries are used in small products such as digital cameras, P-DVDs, MP3 players, mobile phones, PDAs, portable game devices, power tools, and electric bicycles, as well as large products requiring high power such as electric vehicles and hybrid vehicles, power storage devices for storing surplus generated electricity or renewable energy, and backup power storage devices.

[0004] To manufacture such secondary batteries, electrode active material slurry is first applied to positive and negative current collectors to prepare positive and negative electrodes. The positive and negative electrodes are then laminated on either side of a separator to form an electrode assembly having a predetermined shape. The electrode assembly is then housed in a battery case and sealed after electrolyte is injected.

[0005] Multiple secondary batteries can be assembled and housed in a housing to form a battery module. Temperature management within the battery module is a critical issue during its manufacture and use. This is because monitoring the internal temperature of the battery module can help predict and respond to damage and malfunctions within the module.

[0006] Specifically, there is a risk that the battery cells housed within the battery module may be damaged or ruptured due to the external environment or internal defects. Damage and degradation of the battery cells may lead to swelling, a phenomenon in which the battery cells swell. This swelling can cause secondary problems, such as reducing the performance of the battery module or affecting other surrounding components.

[0007] Therefore, a battery module that effectively senses the temperature inside the battery module to prevent secondary problems caused by deformation of the battery cells is needed. In addition, a battery module that is not subject to external forces when the battery cells swell is needed. Summary of the Invention

[0008] Technical issues

[0009] In order to solve the above problems, the present disclosure is directed to providing a battery module that prevents a temperature measuring unit from being broken or malfunctioning due to deformation of an internal structure.

[0010] Technical Solution

[0011] A battery module according to an embodiment of the present disclosure may include: a shell forming an exterior; a battery cell accommodated inside the shell; a circuit unit located between an inner surface of the shell and the battery cell and connected to the battery cell to send and receive electrical signals; a temperature measuring unit located on one surface of the circuit unit facing the battery cell, measuring the temperature of the battery cell to send temperature information to the circuit unit, and spaced apart from the battery cell at a prescribed interval; and a holding portion located between the battery cell and the circuit unit.

[0012] The circuit unit may include a circuit body connected to an inner surface of the case, and a bent portion having one side connected to the circuit body and bent toward the battery cell.

[0013] The temperature measuring unit may be connected to one surface of the bent portion facing the battery cell.

[0014] The bent portion may be formed by being recessed from the circuit main body, and a free space may be formed between the bent portion and the circuit main body.

[0015] The temperature measuring unit may be movable to a free space.

[0016] In a state in which only one end portion of the bent portion is connected to the circuit main body, the other end portion of the bent portion may be spaced apart from the circuit main body.

[0017] The holding portion may be located between the battery cell and the bent portion, and may be attached to the battery cell and the bent portion.

[0018] The holding portion may be connected to one surface of the bent portion connected to the temperature measuring unit.

[0019] As the holding portion is pushed by the battery cell in an outward direction of the battery cell, the temperature measuring unit may move in a direction parallel to the direction in which the holding portion is pushed.

[0020] One surface of the bent portion connected to the temperature measuring unit and the holding portion may include a flat surface.

[0021] The bent portion may be formed as a plurality of bent portions.

[0022] The holding portion may be provided as a plurality of holding portions, and the temperature measuring unit may be located between the plurality of holding portions.

[0023] The plurality of holding portions and the temperature measuring unit may be located on one surface of the bent portion facing the battery cells, and at least one of the plurality of holding portions may be disposed closer to a connection portion of the circuit body and the bent portion than the temperature measuring unit.

[0024] The holding portion may be located on one surface of the circuit unit on which the temperature measuring unit is provided, and may space the circuit unit and the temperature measuring unit apart from the battery cell at a prescribed interval.

[0025] The temperature measuring unit may be movable in a direction away from the battery cell.

[0026] Beneficial effects

[0027] According to the preferred embodiments of the present disclosure, the performance and life of the battery module can be extended by preventing the temperature measuring unit from being broken or malfunctioning due to internal structure deformation.

[0028] In addition, effects that can be easily predicted by those skilled in the art from the configuration according to the preferred embodiments of the present disclosure may be included. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the following detailed description, are used to provide further understanding of the technical aspects of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the accompanying drawings.

[0030] Figure 1 is a perspective view of a battery module according to an embodiment of the present disclosure.

[0031] Figure 2 is a perspective view of a battery module with a housing removed according to an embodiment of the present disclosure.

[0032] Figure 3 is a perspective view of a bus bar assembly according to an embodiment of the present disclosure.

[0033] Figure 4 It is observed from above Figure 3 Magnified view of area P in FIG.

[0034] Figure 5 is an internal cross-sectional view of a battery module according to an embodiment of the present disclosure.

[0035] Figure 6 It is observed from below Figure 3 Magnified view of area P in FIG.

[0036] Figure 7 is an exploded view of a battery module according to yet another embodiment of the present disclosure.

[0037] Figure 8 is a cross-sectional view of a battery module according to yet another embodiment of the present disclosure. DETAILED DESCRIPTION

[0038] Hereinafter, the preferred embodiments of the present disclosure will be described in sufficient detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited or restricted by the following embodiments.

[0039] In order to clearly describe the present disclosure, irrelevant descriptions or detailed descriptions of related known technologies that may unnecessarily obscure the main points of the present disclosure are omitted, and throughout the present disclosure, when figure numerals are attached to elements in various figures, the same or similar figure numerals are attached to the same or similar elements.

[0040] In addition, it should be understood that the terms or words used in the present disclosure and the appended claims should not be interpreted as limited to the general and dictionary meanings, but should be interpreted based on the meanings and concepts corresponding to the technical aspects of the present disclosure on the basis of the principle that the inventor can appropriately define the terms for the best interpretation.

[0041] Figure 1 is a perspective view of a battery module 1 according to an embodiment of the present disclosure, and Figure 2 is a perspective view of a battery module 1 with a portion of a housing 10 removed according to an embodiment of the present disclosure.

[0042] Reference Figure 1 and Figure 2 , the battery module 1 according to an embodiment of the present disclosure can store electrical energy by accommodating a configuration in which electrodes are stacked, and can output the stored electrical energy to the outside according to design and needs. The battery module 1 can sense and measure the heat generated internally during the process of storing and outputting electrical energy. For example, the battery module 1 can be provided with a temperature sensor to sense and measure abnormal changes in the internal temperature, such as phenomena such as heat generation and expansion caused by an increase in the resistance of the battery cells. In addition, the battery module 1 may include a structure to protect the configuration for sensing and measuring the internal temperature.

[0043] Specifically, the battery module 1 may include a case 10 , a battery cell 11 , a bus bar assembly 12 , and a holder 13 .

[0044] The housing 10 forms the exterior of the battery module 1. In other words, while the housing 10 forms a housing space within it, it can include an exterior shape surrounding the housing space. This structure allows the housing 10 to accommodate the various components required for battery function while protecting them from the external environment.

[0045] The battery cells 11 can store electrical energy and can output the stored electrical energy according to design and needs. For example, the battery cells 11 are housed inside the housing 10 and are electrically connected to a bus bar assembly 12 to be described later, so that the stored electrical energy can be output to the outside through the bus bar assembly 12.

[0046] Figure 3 is a perspective view of a bus bar assembly 12 according to an embodiment of the present disclosure.

[0047] Reference Figure 3 The bus bar assembly 12 can be electrically connected to the battery cell 11. For example, the bus bar assembly 12 can be connected to the battery cell 11 to serve as a passage for electrical energy. In addition, the bus bar assembly 12 can transmit electrical signals required to control the battery cell 11 to the battery cell 11, or can transmit electrical signals generated by the battery cell 11 to the control device. In this case, the control device can sense electrical problems such as overcurrent through the bus bar assembly 12, thereby preventing problems such as rupture or damage to the battery cell 11 in advance.

[0048] In addition, the bus bar assembly 12 can be structurally connected to the battery cells 11. For example, in order for the battery module 1 to achieve output and capacity above a certain level, multiple battery cells 11 should be connected in parallel or series, and the bus bar assembly 12 can be used to structurally connect the multiple battery cells 11.

[0049] The bus bar assembly 12 may include a bus bar frame 122 , a circuit unit 120 , and a temperature measuring unit 121 .

[0050] The busbar frame 122 can be connected to the battery cell 11. For example, the busbar frame 122 can be connected to the battery cell 11 in parallel with the length direction of the battery cell 11 and can include a shape that surrounds the battery cell 11. In other words, the busbar frame 122 can be connected to the battery cell 11 and surround a portion of the battery cell 11 including both ends of the battery cell 11, thereby electrically connecting to both terminals of the battery cell 11 through the busbar. According to this structure, multiple battery cells 11 can be fastened to each other by the busbar frame 122 to be integrally formed.

[0051] The circuit unit 120 can be coupled to the busbar assembly 12 and electrically connected to the battery cell 11 to transmit and receive electrical signals. For example, a through hole is formed inside the busbar frame 122, and the circuit unit 120 can be inserted into the through hole of the busbar frame 122, or the circuit unit 120 can be coupled to the busbar frame 122 by attaching with an adhesive tape. That is, the circuit unit 120 can be coupled to the busbar frame 122 so that the circuit unit 120 is located between the inner surface of the housing 10 and the battery cell 11. In addition, a portion of the circuit unit 120 can protrude toward the battery cell 11. According to changes in the size or volume of the battery cell 11, a portion of the circuit unit 120 can be movable.

[0052] Figure 4 It is observed from above Figure 3 The enlarged view of the area P in Figure 5 is an internal cross-sectional view of a battery module according to an embodiment of the present disclosure, and Figure 6 It is observed from below Figure 3 Magnified view of area P in FIG.

[0053] Reference Figures 4 to 6 , the circuit unit 120 may include a circuit body 1200 and a bent portion 1201 .

[0054] The circuit body 1200 may be connected to the inner surface of the housing 10. The circuit body 1200 is part of the space forming the circuit unit 120, and as previously described, it may be inserted into a through-hole formed inside the busbar frame 122, or coupled to the busbar frame 122 by adhesive tape attachment. For example, the through-hole inside the busbar frame 122 may be formed along the length direction of the battery cell 11, and the circuit body 1200 may also be disposed along the length direction of the battery cell 11.

[0055] One side of the bent portion 1201 may be connected to the circuit main body 1200, and the bent portion 1201 may be bent toward the battery cell 11. For example, the bent portion 1201 may include a shape that protrudes toward the battery cell 11 while being bent in connection with the circuit main body 1200. That is, in a state where only one end of the bent portion 1201 is connected to the circuit main body 1200, the other end of the bent portion 1201 may be spaced apart from the circuit main body 1200. In other words, one side of the bent portion 1201 is connected to the circuit main body 1200 in a curved shape, and the bent portion 1201 is formed by extending from one side of the bent portion 1201, so that the other side of the bent portion 1201 can be formed to be spaced apart from the circuit main body 1200.

[0056] Specifically, the bent portion 1201 may be formed by being recessed from the circuit body 1200. For example, the interior of the circuit body 1200 includes a penetration portion, and when viewed from above, the bent portion 1201 may be located at the penetration portion of the circuit body 1200. That is, the bent portion 1201 may be formed to protrude from the circuit body 1200 toward the battery cell 11, thereby being located on the lower side of the penetration portion of the circuit body 1200.

[0057] As a more specific example, the bent portion 1201 may have a shape similar to an English capital letter L. In the L-shape, the horizontal portion may be longer and the vertical portion may be shorter, and the portion corresponding to the vertical portion of the L-shape may have an inclined shape.

[0058] Also, a spare space S may be formed between the bent portion 1201 and the circuit body 1200 . In other words, the spare space S may be formed between the extended surface of the penetration portion of the circuit body 1200 and the bent portion 1201 .

[0059] The temperature measuring unit 121 may measure the temperature of the battery cell 11 and transmit the temperature information to the circuit unit 120. For example, the temperature measuring unit 121 may include at least one instrument for sensing temperature, such as a resistance thermometer detector (RTD), a thermocouple, and a thermistor, to measure the temperature of the battery cell 11. That is, the temperature measuring unit 121 may convert the temperature of the battery cell 11 into an electrical signal and transmit it to the circuit unit 120.

[0060] The temperature measurement unit 121 may be located on one surface of the circuit unit 120 facing the battery cell 11. For example, the temperature measurement unit 121 may be connected to one surface of the curved portion 1201 facing the battery cell 11. That is, the empty space S and the temperature measurement unit 121 may be located on both sides of the curved portion 1201 with the curved portion 1201 as a reference. In other words, the empty space S may be formed on the upper side of the curved portion 1201, and the temperature measurement unit 121 may be connected to the lower side of the curved portion 1201.

[0061] The temperature measuring unit 121 may be spaced apart from the battery cell 11 at a prescribed interval. That is, the temperature measuring unit 121 may not be in contact with the battery cell 11. In this case, the temperature measuring unit 121 may be movable in a direction away from the battery cell 11. For example, in a state where the temperature measuring unit 121 is spaced apart from the battery cell 11 at a prescribed interval, a phenomenon may occur in which the battery cell 11 approaches the temperature measuring unit 121, for example, expands, and in this case, the temperature measuring unit 121 may move in a direction away from the battery cell 11. At this time, the temperature measuring unit 121 may move toward the empty space S. More specific phenomena and structures will be described in the description of the retaining portion 13 later.

[0062] The holding portion 13 may be located between the battery cell 11 and the circuit unit 120. The holding portion 13 is located between the battery cell 11 and the circuit unit 120 so that both surfaces of the holding portion 13 can be connected to the battery cell 11 and the circuit unit 120, respectively. For example, the holding portion 13 may include a pad material that can be attached to the battery cell 11 and the circuit unit 120.

[0063] Specifically, the holder 13 may be located between the battery cell 11 and the bent portion 1201 and may be attached to the battery cell 11 and the bent portion 1201. According to this structure, the holder 13 may space the circuit unit 120 and the temperature measurement unit 121 apart from the battery cell 11 at a prescribed interval.

[0064] The retaining portion 13 may be located on one surface of the circuit unit 120 on which the temperature measuring unit 121 is provided. That is, the retaining portion 13 and the temperature measuring unit 121 may be located on the same plane of the circuit unit 120. Specifically, the retaining portion 13 may be connected to one surface of the curved portion 1201 connected to the temperature measuring unit 121. In this case, the distance between the two surfaces of the retaining portion 13 connecting the battery cell 11 and the circuit unit 120 may be longer than the distance between one surface of the temperature measuring unit 121 connecting the circuit unit 120 and the other surface of the temperature measuring unit 121 facing the battery cell 11. In other words, when viewed from the side, the height of the retaining portion 13 may be higher than the height of the temperature measuring unit 121.

[0065] With this structure, retaining portion 13 can maintain a constant distance between temperature measurement unit 121 and battery cell 11. Furthermore, as retaining portion 13 is pushed outward by battery cell 11, temperature measurement unit 121 can move in a direction parallel to the direction in which retaining portion 13 is pushed. That is, when temperature measurement unit 121 is spaced apart from battery cell 11 by a specified distance, and battery cell 11 expands due to the expansion of battery cell 11, retaining portion 13 is pushed along battery cell 11. Receiving external force from battery cell 11 serves to push curved portion 1201, and temperature measurement unit 121 connected to curved portion 1201 receiving external force from retaining portion 13 can also be pushed along retaining portion 13. Therefore, regardless of changes in the volume of battery cell 11, temperature measurement unit 121 can always maintain a constant distance from battery cell 11.

[0066] One surface of the bent portion 1201 connected to the temperature measuring unit 121 and the holding portion 13 may include a flat surface. For example, one surface of the bent portion 1201 connecting the temperature measuring unit 121 and the holding portion 13 may be formed flat and disposed parallel to one surface of the battery cell 11 facing the circuit unit 120.

[0067] A plurality of retaining portions 13 may be provided, and the temperature measurement unit 121 may be located between the plurality of retaining portions 13. In other words, the plurality of retaining portions 13 and the temperature measurement unit 121 may be located on one surface of the curved portion 1201 facing the battery cell 11. In this case, at least one of the plurality of retaining portions 13 may be located closer to the connection between the circuit body 1200 and the curved portion 1201 than the temperature measurement unit 121.

[0068] According to this structure, the circuit unit 120 does not contact the battery cell 11 without a cutout structure and maintains a constant distance from all parts of the battery cell 11, and the temperature measuring unit 121 is located between the multiple holding portions 13, so that the temperature measuring unit can be further prevented from being damaged and destroyed by the battery cell 11.

[0069] When an overcurrent exceeding a limit flows through the battery cell 11, when the battery cell 11 is damaged by external force, or when the electrolyte causes an abnormal decomposition reaction, the temperature of the battery cell 11 may rise rapidly. This rapid temperature rise may cause an accident such as swelling and explosion of the battery cell 11. To prevent such accidents in advance, the temperature measurement unit 121 senses the temperature of the battery cell 11 in real time and transmits an electrical signal to the control device through the circuit unit 120. Due to the structural features of the circuit unit 120 and the retaining portion 13, the temperature measurement unit 121 can more stably sense the temperature of the battery cell 11.

[0070] In addition, by designing a structure in which only one end of the bent portion 1201 is connected to the circuit main body 1200 and the other end of the bent portion 1201 and the temperature measurement unit 121 can be moved to the empty space S, the bent portion 1201 can include a structure that is more buffered against the expansion of the battery cell 11. That is, when only one end of the bent portion 1201 is connected to the circuit main body 1200, the buffering effect of the bent portion 1201 and the retaining portion 13 can be further increased compared to when both ends of the bent portion 1201 are connected to the circuit main body 1200.

[0071] Therefore, the structural stability and measurement accuracy of the temperature measuring unit 121 are increased, so that the performance of the battery module 1 can be further ensured and the life of the battery module 1 can be further increased.

[0072] Hereinafter, a battery module 1 according to another embodiment of the present disclosure will be described. Specifically, an embodiment in which a plurality of the above-described bent portions 1201 are provided will be described below. However, the following description will be omitted for details that overlap with the above-described contents.

[0073] The battery module 1 according to another embodiment of the present disclosure may include a plurality of bent portions 1201. In addition, it may include a plurality of retaining portions 13 and a plurality of temperature measuring units 121 respectively connected to the plurality of bent portions 1201. According to this structure, when expansion occurs locally in various parts of the battery cell 11, the battery module 1 can more effectively prevent the problem of damage to the temperature measuring unit 121 caused by the expansion through the various bent portions 1201 and the temperature measuring units 121 corresponding to the various parts of the battery cell 11 where the expansion occurs. In addition, the battery module 1 can sense the temperature of the various parts of the problematic battery cell 11, and can identify the part or configuration of the battery cell 11 that causes the problem, thereby more effectively preventing secondary damage caused by the expansion.

[0074] In addition, the following will describe a battery module 2 according to another embodiment of the present disclosure. Specifically, unlike the battery module 1 according to the above-described embodiment of the present disclosure, the battery module 2 according to another embodiment of the present disclosure can be formed into a U-shaped frame structure. The following description will be omitted for parts that overlap with the battery module 1 according to the above-described embodiment of the present disclosure.

[0075] Figure 7 is an exploded view of a battery module 2 according to yet another embodiment of the present disclosure, and Figure 8 is a cross-sectional view of a battery module 2 according to yet another embodiment of the present disclosure.

[0076] Reference Figure 7 and Figure 8 The battery module 2 may include a housing 20 , a battery cell 21 , a circuit unit 220 , a temperature measuring unit 221 , and a holding portion 23 .

[0077] The housing 20 may form an exterior of the battery module 2. In other words, the interior of the housing 20 may form an accommodation space, and the housing 20 may include a shape surrounding the exterior of the accommodation space, thereby accommodating various configurations required for battery functions in the housing 20.

[0078] Specifically, the shell 20 may include a U-shaped frame 200 forming a bottom surface and a side surface, an end plate 201 covering the front surface and the rear surface of the U-shaped frame 200, and a cover plate 202 covering the upper side of the U-shaped frame 200 and the end plate 201 to seal the internal accommodating space.

[0079] The battery cell 21 may store electric energy and output the stored electric energy according to design and need. The battery cell 21 may be accommodated inside the housing 20.

[0080] The circuit unit 220 may be coupled to the inner surface of the housing 20 and may transmit and receive electrical signals from a temperature measurement unit 221, which will be described later. For example, the circuit unit 220 may be located between the housing 20 and the battery cell 21. In other words, the circuit unit 220 may be located on the underside of the cover plate 201 and between the cover plate 201 and the battery cell 21.

[0081] In addition, a portion of the circuit unit 220 may protrude toward the battery cell 21. A portion of the circuit unit 220 may be movable according to a change in size or volume of the battery cell 21. For example, the circuit unit 220 may include a circuit body 2200 and a bent portion 2201.

[0082] The circuit body 2200 may be coupled to the inner lower surface of the cap plate 201. One side of the curved portion 2201 may be connected to the circuit body 2200, and the other side of the curved portion 2201 may be bent toward the battery cell 21. Specifically, the curved portion 2201 may be formed by being recessed from the circuit body 2200. Furthermore, a vacant space S may be formed between the curved portion 2201 and the circuit body 2200.

[0083] The temperature measuring unit 221 may measure the temperature of the battery cell 21 to transmit the temperature information to the circuit unit 220. That is, the temperature measuring unit 221 may convert the temperature of the battery cell 21 into an electrical signal and transmit it to the circuit unit 220.

[0084] The temperature measuring unit 221 may be located on one surface of the circuit unit 220 facing the battery cell 21. For example, the temperature measuring unit 221 may be connected to one surface of the bent portion 2201 facing the battery cell 21.

[0085] The temperature measuring unit 221 may be spaced apart from the battery cell 21 at a prescribed interval. That is, the temperature measuring unit 221 may not be in contact with the battery cell 21. In this case, the temperature measuring unit 221 may be movable in a direction away from the battery cell 21.

[0086] Specifically, the retaining portion 23 may be located between the battery cell 21 and the circuit unit 220. The retaining portion 23 is located between the battery cell 21 and the circuit unit 220 so that both surfaces of the retaining portion 23 can be connected to the battery cell 21 and the circuit unit 220, respectively. The retaining portion 23 may be located between the battery cell 21 and the curved portion 2201 and may be attached to the battery cell 21 and the curved portion 2201. With this structure, the retaining portion 23 can separate the circuit unit 220 and the temperature measurement unit 221 from the battery cell 21 at a predetermined distance.

[0087] The above description is merely an illustrative description of the technical concept of the present disclosure, and various modifications and changes may be made by those skilled in the art in the technical field to which the present disclosure belongs without departing from the basic characteristics of the present disclosure.

[0088] Therefore, the embodiments disclosed in the present disclosure are not intended to limit the technical concept of the present disclosure but are for illustrative purposes, and the scope of the technical concept of the present disclosure is not limited by these embodiments.

[0089] The protection scope of the present disclosure should be interpreted according to the following claims, and all technical concepts within the scope equivalent thereto should be interpreted as being included in the scope of the present disclosure.

[0090] [Explanation of Reference Numerals]

[0091] 1: Battery module

[0092] 10: Shell

[0093] 11: Battery cells

[0094] 12: Busbar assembly

[0095] 120: Circuit unit

[0096] 121: Temperature measurement unit

[0097] 122: Busbar frame

[0098] 1200: Circuit body

[0099] 1201: Bend

[0100] 13: Maintenance

[0101] S: Free space

Claims

1. A battery module comprising: a housing, the housing forming an exterior; a battery cell housed inside the housing; a circuit unit located between the inner surface of the housing and the battery cell and connected to the battery cell to send and receive electrical signals; a temperature measuring unit located on one surface of the circuit unit facing the battery cell, measuring the temperature of the battery cell to transmit temperature information to the circuit unit, and spaced apart from the battery cell at a prescribed interval; as well as A holding portion is located between the battery cell and the circuit unit.

2. The battery module according to claim 1, in, The circuit unit includes: a circuit body connected to the inner surface of the housing; and A bent portion has one side connected to the circuit body and is bent toward the battery cell.

3. The battery module according to claim 2, wherein: The temperature measuring unit is connected to one surface of the bent portion facing the battery cell.

4. The battery module according to claim 3, wherein: The bent portion is formed by being recessed from the circuit main body, and a free space is formed between the bent portion and the circuit main body.

5. The battery module according to claim 4, wherein: The temperature measuring unit is movable to the empty space.

6. The battery module according to claim 4, wherein: In a state in which only one end portion of the bent portion is connected to the circuit main body, the other end portion of the bent portion is spaced apart from the circuit main body.

7. The battery module according to claim 3, wherein: The holding portion is located between the battery cell and the bent portion and is attached to the battery cell and the bent portion.

8. The battery module according to claim 7, wherein: The holding portion is connected to one surface of the bent portion connected to the temperature measuring unit.

9. The battery module according to claim 8, wherein: As the holding portion is pushed by the battery cell in an outward direction of the battery cell, the temperature measurement unit moves in a direction parallel to a direction in which the holding portion is pushed.

10. The battery module according to claim 8, wherein: The one surface of the bent portion connected to the temperature measuring unit and the holding portion includes a flat surface.

11. The battery module according to claim 2, wherein: The bent portion is formed as a plurality of bent portions.

12. The battery module according to claim 2, wherein: The holding portion is provided as a plurality of holding portions, and the temperature measuring unit is located between the plurality of holding portions.

13. The battery module according to claim 12, in, The plurality of holding portions and the temperature measuring unit are located on one surface of the bent portion facing the battery cells, and At least one of the plurality of holding portions is disposed closer to a connection portion between the circuit body and the bent portion than to the temperature measuring unit.

14. The battery module according to claim 1, in, The holding portion is located on one surface of the circuit unit on which the temperature measuring unit is provided, and spaces the circuit unit and the temperature measuring unit apart from the battery cell at a prescribed interval.

15. The battery module according to claim 14, wherein: The temperature measuring unit is movable in a direction away from the battery cell.

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