Battery module, battery pack including same, and automobile

Abstract

A battery module according to one embodiment of the present invention includes a sub-module including a cell stack assembly having a plurality of battery cells, a module housing that accommodates the sub-module, a front sealing plate that covers an opening on one longitudinal side of the module housing and has an inlet, a rear sealing plate that covers an opening on the other longitudinal side of the module housing and has an outlet, and a sensing assembly that senses the voltage of the battery cells.

Description

[Technical field]

[0001] The present invention relates to a battery module, a battery pack, and an automobile including the same, and more specifically, to a battery module having a structure in which an insulating coolant that flows into a module housing to cool battery cells directly contacts components such as electrode leads and bus bars of the battery cells to achieve efficient cooling, and which also enables efficient flow of the insulating coolant through flow paths between adjacent battery cells, and a battery pack and an automobile including the same.

[0002] This application claims priority to Korean Patent Application No. 10-2021-0074424, filed on June 8, 2021, the entire contents of which are incorporated herein by reference in their entirety in the specification and drawings. [Background technology]

[0003] In the case of a battery module that employs an indirect water-cooling method using coolant, the coolant does not come into direct contact with the battery cells but indirectly comes into contact with the battery cells through the module housing that accommodates the battery cells, so the cooling performance is limited. Also, a separate cooling device such as a heat sink must be provided outside the module housing to form a cooling flow path, which increases the overall volume of the battery module and causes a loss of energy density.

[0004] In order to solve such problems with the indirect water cooling method, there is a need to develop a battery module having a cooling structure that allows the coolant to flow directly into the module housing and come into direct contact with the battery cells. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a battery module having a structure that allows an insulating coolant to flow into the inside of the battery module and come into direct contact with the battery cells and electrical connection components, thereby achieving efficient cooling, and also having a structure that allows the coolant that has flowed into the inside of the battery module to flow smoothly.

[0006] Another object of the present invention is to prevent sensing lines and temperature sensors provided for sensing the voltage and temperature of the battery cells from being damaged by insulating coolant flowing inside the battery module, and to enable accurate temperature measurement.

[0007] The technical problems that the present invention aims to solve are not limited to the problems mentioned above, and other problems will be clearly understood by those skilled in the art from the following description of the invention. [Means for solving the problem]

[0008] In order to achieve the above object, a battery module according to one aspect of the present invention includes a sub-module including a cell stack assembly having a plurality of battery cells, a module housing for accommodating the sub-module, a front sealing plate covering one longitudinal side opening of the module housing and having an inlet, a rear sealing plate covering the other longitudinal side opening of the module housing and having an outlet, and a sensing assembly for sensing the voltage of the battery cells.

[0009] The sensing assembly may be disposed on an upper end of the sub-module.

[0010] The sensing assembly may include a sensing line electrically connected to the plurality of battery modules and extending from one end to the other end of the battery cell in a longitudinal direction.

[0011] The sensing line may be interposed between a cell body portion of the battery cell and a cell wing portion bent toward the cell body portion.

[0012] The sensing assembly may further include a temperature sensor mounted on the sensing line.

[0013] The temperature sensor may be interposed between a cell body portion of the battery cell and a cell wing portion bent toward the cell body portion.

[0014] The cell stack assembly may further include a flow path spacer interposed between adjacent battery cells.

[0015] The flow channel spacer may include a coolant flow channel extending along a length of the flow channel spacer.

[0016] The sub-module may further include a front bus bar frame assembly coupled to one side of the cell stack assembly in a longitudinal direction, and a rear bus bar frame assembly coupled to the other side of the cell stack assembly in a longitudinal direction.

[0017] The front bus bar frame assembly may include a bus bar frame and a plurality of bus bars fixed on the bus bar frame and coupled to electrode leads of the battery cells.

[0018] The busbar frame may include a cooling fluid hole.

[0019] The cooling fluid hole may be formed at a position corresponding to the flow path spacer.

[0020] Meanwhile, a battery pack and a vehicle according to an aspect of the present invention include the battery module according to the present invention as described above. Effect of the Invention

[0021] According to one aspect of the present invention, the insulating coolant flows into the inside of the battery module and comes into contact with the battery cells, and the coolant that flows into the inside of the battery module can flow smoothly, thereby enabling efficient and rapid cooling.

[0022] In addition, according to one aspect of the present invention, the sensing lines and temperature sensors installed for sensing the voltage and temperature of the battery cells can be prevented from being damaged by the insulating coolant flowing inside the battery module, and the influence of the insulating coolant when measuring the temperature of the battery cells can be minimized, enabling accurate temperature measurement.

[0023] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention, serve to further understand the technical ideas of the present invention. Therefore, the present invention should not be interpreted as being limited only to the matters described in the drawings. [Brief description of the drawings]

[0024] [Figure 1] 1 is a perspective view showing a battery module according to an embodiment of the present invention; [Diagram 2] 1 is an exploded perspective view showing a battery module according to an embodiment of the present invention; [Diagram 3] 2 is a cross-sectional view taken along line AA' in FIG. [Figure 3a] 4A to 4C are diagrams showing another embodiment of the flow path spacer shown in FIG. [Figure 3b] 4A to 4C are diagrams showing another embodiment of the flow path spacer shown in FIG. [Figure 4] 2 is a view showing the battery module shown in FIG. 1 with a front end plate and a front sealing plate removed. [Diagram 5] FIG. 4 is a diagram showing the flow of insulating coolant for cooling. [Figure 6] FIG. 4 is a diagram showing the flow of insulating coolant for cooling. [Figure 7]1 is a diagram showing a connection structure between a bus bar frame and a flow path spacer according to the present invention; [Figure 8] 1 is a diagram showing a specific structure of a terminal assembly according to the present invention; [Figure 9] 1 is a diagram showing a specific structure of a terminal assembly according to the present invention; [Figure 10] FIG. 2 shows an arrangement of a sensing assembly according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings. Prior to this, the terms and words used in this specification and claims should not be interpreted as being limited to their ordinary and dictionary meanings, but should be interpreted as being in accordance with the meaning and concept of the technical idea of ​​the present invention, in accordance with the principle that the inventor himself can appropriately define the concept of the term in order to best describe the invention. Therefore, it should be understood that the embodiment described in this specification and the configuration shown in the drawings are merely one most preferred embodiment of the present invention, and do not represent the entire technical idea of ​​the present invention, and therefore there may be various equivalents and modifications that can be substituted for them at the time of this application.

[0026] 1, 2 and 4, a battery module according to an embodiment of the present invention includes a sub-module 100, a module housing 200, a front sealing plate 300, a rear sealing plate 400, and a sensing assembly 800. In addition to the above-mentioned components, the battery module may further include a front end plate 500 and / or a rear end plate 600 and / or a pair of terminal assemblies 700.

[0027] 2 to 6, the sub-module 100 includes a cell stack assembly 110. In addition to the cell stack assembly 110, the sub-module 100 may further include a front bus bar frame assembly 120A and a rear bus bar frame assembly 120B.

[0028] The cell stack assembly 110 includes a plurality of battery cells 111. The cell stack assembly 110 may further include at least one flow path spacer 112 interposed between adjacent battery cells 111 and / or at least one buffer pad 113 interposed between adjacent battery cells 111. The battery cells 111 are stacked in a vertically standing form on the ground (a plane parallel to the XY plane) to form one cell stack assembly 110. When the cell stack assembly 110 includes at least one flow path spacer 112 and / or at least one buffer pad 113, they are also stacked together with the battery cells 111 in a vertically standing form on the ground to form one cell stack assembly 110.

[0029] The battery cell 111 may be a pouch-type battery cell having a pair of electrode leads 111a extending in opposite directions along the longitudinal direction (X-axis direction) of the battery cell 111.

[0030] 3 to 3b, 5 and 6, the flow path spacer 112 is interposed between adjacent battery cells 111 and includes a coolant flow path 112a through which the insulating coolant flowing into the inside of the battery module can flow along the longitudinal direction (X-axis direction) of the battery module. A plurality of coolant flow paths 112a may be provided. The coolant flow paths 112a extend along the longitudinal direction (X-axis direction) of the flow path spacer 112.

[0031] The flow path spacers 112 may be interposed between adjacent battery cells 111. In this case, since both sides of each battery cell 111 are cooled by the flow path spacers 112, there are advantages in that the cooling effect is maximized and the insulating coolant flowing into the battery module can flow more smoothly.

[0032] Alternatively, the number of the flow path spacers 112 may be approximately half the number of the battery cells 111. Specifically, the plurality of flow path spacers 112 may be arranged such that a pair of battery cells 111 is located between a pair of adjacent flow path spacers 112. In this case, only one of both surfaces of each battery cell 111 contacts the flow path spacer 112. When the plurality of flow path spacers 112 are arranged in this manner, it is possible to achieve both an improvement in cooling efficiency of the battery cells 111 and an improvement in energy density.

[0033] 3 together with FIGS. 5 and 6, the coolant flow passage 112a has a hole shape penetrating along the longitudinal direction (X-axis direction) of the flow passage spacer 112. Therefore, the insulating coolant flowing through the flow passage spacer 112 does not directly contact the body of the battery cell 111, but indirectly contacts the body of the battery cell 111 through the flow passage spacer 112. A plurality of the coolant flow passages 112a may be provided. In this case, the coolant flow passages 112a may be formed spaced apart from each other along the height direction (Z-axis direction) of the flow passage spacer 112.

[0034] 3a together with Fig. 5 and Fig. 6, the channel spacer 112 may have a shape in which a first battery cell located on one side of the channel spacer 112 and a second battery cell located on the other side of the channel spacer 112 are alternately contacted along a height direction (Z-axis direction) of the channel spacer 112. In this case, the coolant channel 112a includes a first coolant channel formed between the channel spacer 112 and the first battery cell, and a second coolant channel formed between the channel spacer 112 and the second battery cell. The first coolant channel and the second coolant channel are alternately formed along the height direction (Z-axis direction) of the channel spacer 112.

[0035] According to the structure of the flow path spacer 112 shown in Fig. 3a as described above, the insulating coolant flowing through the first coolant flow path directly contacts the first battery cell to cool it, and the insulating coolant flowing through the second coolant flow path directly contacts the second battery cell to cool it.

[0036] Referring now to FIG. 3b in conjunction with FIGS. 5 and 6, the structure of a channel spacer having a different configuration from that of the channel spacer of FIG. 3a described above will be described.

[0037] The flow path spacer 112 shown in FIG. 3b includes a first portion spaced apart from a first battery cell located on one side of the flow path spacer 112 and a second battery cell located on the other side, and a second portion contacting both of the pair of battery cells.

[0038] In this case, the coolant flow passage 112a includes a first coolant flow passage formed between the first portion and the first battery cell and between the second portion and the second battery cell, and a second coolant flow passage surrounded by the second portion. The insulating coolant flowing through the first coolant flow passage directly contacts the cell body portion B of the battery cell 111 to perform cooling, and the insulating coolant flowing through the second coolant flow passage indirectly contacts the cell body portion B of the battery cell 111 to perform cooling. The first coolant flow passage and the second coolant flow passage are alternately formed along the height direction (Z-axis direction) of the flow passage spacer.

[0039] On the other hand, the insulating coolant used for cooling in the present invention is a coolant with improved insulating properties, and for example, insulating oil can be used.

[0040] The buffer pads 113 are interposed between adjacent battery cells 111 to absorb volume expansion caused by swelling of the battery cells 111 .

[0041] The front bus bar frame assembly 120A and the rear bus bar frame assembly 120B are respectively coupled to one side and the other side in the longitudinal direction (X-axis direction) of the cell stack assembly 110 to electrically connect the plurality of battery cells 111. The front bus bar frame assembly 120A has an internal terminal 123, and the rear bus bar frame assembly 120B has substantially the same structure, except that it does not have the internal terminal 123. Therefore, a detailed description of the specific structure of the rear bus bar frame assembly 120B will be omitted, and the specific structure of the front bus bar frame assembly 120A will be mainly described.

[0042] 4 to 7, the front bus bar frame assembly 120A includes a bus bar frame 121 and a plurality of bus bars 122. In addition to the above-mentioned components, the front bus bar frame assembly 120A may further include a pair of internal terminals 123. The bus bar frame 121 covers one side of the cell stack assembly 110 in the longitudinal direction (X-axis direction).

[0043] The bus bar frame 121 has a plurality of cooling liquid holes 121a. The cooling liquid holes 121a function as a passage through which the insulating cooling liquid that has flowed into the inside of the module housing 200 through the inlet P1 provided in the front sealing plate 300 passes through the bus bar frame 121 and flows into the cell stack assembly 110 side.

[0044] In consideration of this function, the coolant holes 121a may be formed at positions corresponding to the flow path spacers 112 provided in the cell stack assembly 110. In addition, the coolant holes 121a may have a size corresponding to the flow path spacers 112.

[0045] The cooling liquid flowing into the cell stack assembly 110 through the cooling liquid hole 121a formed in the front bus bar frame assembly 120A moves to the rear bus bar frame assembly 120B through the cooling liquid flow path 112a formed by the flow path spacer 112 along the arrow (see FIGS. 5 and 6). The insulating cooling liquid that has moved to the rear bus bar frame assembly 120B flows to the rear sealing plate 400 through the cooling liquid hole 121a formed in the rear bus bar frame assembly 120B, and is discharged to the outside of the battery module through the outlet P2 provided in the rear sealing plate 400. In this process, the insulating cooling liquid directly contacts the electrode lead 111a and the bus bar 122 of the battery cell 111, and directly or indirectly contacts the cell body part B of the battery cell 111 to effectively cool the inside of the battery module.

[0046] The bus bar 122 is fixed on the bus bar frame 121 and is coupled to an electrode lead 111a drawn through a lead slit formed in the bus bar frame 121 to electrically connect the plurality of battery cells 111. Like the bus bar frame 121, the bus bar 122 may have a coolant hole formed at a position corresponding to the flow path spacer 112 so that an insulating coolant can pass through.

[0047] The internal terminals 123 are fixed on the bus bar frame 121 and coupled to electrode leads 111a of the battery cells 111 located at the outermost position among the battery cells 111 installed in the cell stack assembly 110. The internal terminals 123 function as high potential terminals. The internal terminals 123 located at one side in the longitudinal direction (Y-axis direction) of the bus bar frame 121 function as a positive high potential terminal, and the internal terminals 123 located at the other side in the longitudinal direction of the bus bar frame 121 function as a negative high potential terminal. The internal terminals 123 are electrically connected to external terminals 710 (see FIGS. 8 and 9) described below.

[0048] The insulating coolant flowing into the inside of the battery module can fill the space between the front sealing plate 300 and the front bus bar frame assembly 120A, and can also fill the space between the rear sealing plate 400 and the rear bus bar frame assembly 120B. As a result, the insulating coolant comes into contact with the electrode leads 111a, the bus bars 122, and the internal terminals 123, which are components where heat is generated intensively, and can efficiently cool the battery module.

[0049] 5, 6 and 7, the bus bar frame 121 of the front bus bar frame assembly 120A and the bus bar frame 121 of the rear bus bar frame assembly 120B may have a plurality of guide ribs 121b formed on upper and lower ends along the longitudinal direction (Y-axis direction). The guide ribs 121b extend in a direction toward the cell stack assembly 110. The guide ribs 121b are formed at positions corresponding to the flow path spacers 112.

[0050] Meanwhile, fixing portions 112b having a shape corresponding to the guide ribs 121b are formed on both ends of the flow path spacer 112 in the longitudinal direction (X-axis direction). The guide ribs 121b and the fixing portions 112b limit the movement of the flow path spacer 112 in the vertical direction (Z-axis direction) and the longitudinal direction (X-axis direction). As a result, when the front bus bar frame assembly 120A and the rear bus bar frame assembly 120B are coupled to the cell stack assembly 110, the coupling positions can be guided, thereby increasing the convenience of assembly.

[0051] 1 to 6, the module housing 200 accommodates a sub-module 100 including a cell stack assembly 110, a front bus bar frame assembly 120A, and a rear bus bar frame assembly 120B. The module housing 200 has one and the other sides in the longitudinal direction (X-axis direction) open.

[0052] 5, 6, 8 and 9, the front sealing plate 300 covers an opening formed on one side in the longitudinal direction (X-axis direction) of the module housing 200. The front sealing plate 300 includes an inlet P1 for the inflow of insulating coolant. To prevent leakage of the insulating coolant, a gasket G may be interposed between a peripheral surface of the front sealing plate 300 and an inner surface of the module housing 200 (see FIG. 9).

[0053] The front sealing plate 300 has a pair of terminal holes 300a through which components for electrical connection between an internal terminal 123 provided in the front bus bar frame assembly 120A and an external terminal 710 (described later) can pass. The terminal holes 300a are formed at positions corresponding to the internal terminals 123.

[0054] 6, the rear sealing plate 400 covers the other side opening in the longitudinal direction (X-axis direction) of the module housing 200 and includes an outlet P2 for discharging the insulating cooling liquid. As with the front sealing plate 300, a gasket G may be interposed between the peripheral surface of the rear sealing plate 400 and the inner surface of the module housing 200 to prevent leakage of the insulating cooling liquid.

[0055] The front sealing plate 300 and the rear sealing plate 400 may be made of insulating resin for electrical insulation.

[0056] 8 and 9, the terminal assembly 700 includes an external terminal 710 located on the outer side of the front sealing plate 300, and a stud 720 that electrically connects the external terminal 710 and the battery cell 111. The stud 720 is fixed to the internal terminal 123. The stud 720 may be fixed to the internal terminal 123 by a push-in manner through the internal terminal 123. The stud 720 fixed to the internal terminal 123 is pulled out to the outside through a terminal hole 300a formed in the front sealing plate 300 and coupled to the external terminal 710.

[0057] The terminal assembly 700 may further include an annular terminal spacer 730 inserted into a terminal hole 300a formed in the front sealing plate 300. The terminal spacer 730 may be made of a metal material. When the terminal spacer 730 is provided, the stud 720 passes through the terminal spacer 730.

[0058] The terminal assembly 700 may further include a fastening nut 740 for fastening the external terminal 710 to the stud 720. The fastening nut 740 is fastened to the stud 720 passing through the terminal spacer 730 and the fastening portion 712 of the external terminal 710, thereby closely fixing the fastening portion 712 of the external terminal 710 to the terminal spacer 730. Thus, the internal terminal 123 and the external terminal 710 are electrically connected to each other through the terminal spacer 730.

[0059] The terminal assembly 700 may further include a first O-ring 750 covering an outer circumferential surface of the terminal spacer 730 and interposed between an inner surface of the front sealing plate 300 and the inner terminal 123. Referring to Fig. 9, the first O-ring 750 prevents the insulating cooling liquid that has flowed into the space between the front sealing plate 300 and the bus bar frame 121 from leaking out of the space between the inner surface of the terminal hole 300a and the terminal spacer 730 to the outside of the front sealing plate 300.

[0060] Also, the terminal assembly 700 may further include a second O-ring 760 positioned on the outer periphery of the stud 720 pressed into the internal terminal 123 and exposed in the space between the internal terminal 123 and the bus bar frame 121, and interposed between the internal terminal 123 and the bus bar frame 121. The second O-ring 760 prevents the insulating coolant that has flowed into the space between the front sealing plate 300 and the bus bar frame 121 from leaking out of the front sealing plate 300 from the space between the internal terminal 123 and the stud 720 and the space between the inner surface of the terminal spacer 730 and the stud 720.

[0061] 1, 2, 5 and 6, the front end plate 500 is fixed to the module housing 200, covering the front sealing plate 300. The rear end plate 600 is fixed to the module housing 200, covering the rear sealing plate 400.

[0062] The front end plate 500 includes a terminal exposing portion 500a that exposes a connecting portion 711 of an external terminal 710 to the outside of the front end plate 500, and an inlet exposing portion 500b that exposes the inlet P1 to the outside of the front end plate 500. The rear end plate 600 includes an outlet exposing portion 600b that exposes the outlet P2 to the outside of the rear end plate 600.

[0063] When the front end plate 500 and the rear end plate 600 are applied, gaskets may be interposed at the joining portions between the front end plate 500 and the module housing 200 and at the joining portions between the rear end plate 600 and the module housing 200 to prevent leakage of insulating cooling liquid.

[0064] 3, 4 and 10, the sensing assembly 800 is disposed at an upper end of the sub-module 100 to sense the voltage of the battery cell 111. The sensing assembly 800 includes sensing lines 810 electrically connected to the battery cells 111 and extending from one end to the other end of the battery cells 111 in a longitudinal direction (X-axis direction). The sensing lines 810 are electrically connected to the battery cells 111 at one and the other sides of the longitudinal direction (X-axis direction) of the cell stack assembly 110. The electrical connection between the sensing lines 810 and the battery cells 111 may be implemented by connecting the sensing lines 810 to the bus bars 122, but the sensing lines 810 may also be directly connected to the electrode leads 111a of the battery cells 111.

[0065] The sensing line 810 may be interposed between a cell body part B of the pouch-type battery cell 111 and a cell wing part W bent toward the cell body part B. This is to prevent the sensing line 810 from being damaged by an insulating coolant flowing inside the battery module. When the battery cell 111 is a pouch type, a region in which an electrode assembly (not shown) is accommodated may be defined as the cell body part B, and a region of a sealing region formed on the periphery of the cell body part B that extends long along the longitudinal direction (X-axis direction) of the battery module may be defined as the cell wing part W.

[0066] The sensing assembly 800 may further perform a function of sensing the temperature of the battery cell 111 in addition to sensing the voltage. To this end, the sensing assembly 800 may further include at least one temperature sensor 820 mounted on the sensing line 810. The temperature sensor 820 may be disposed adjacent to the electrode lead 111a which generates a large amount of heat. The temperature sensor 820 may be interposed between the cell body part B of the battery cell 111 and the cell wing part W bent toward the cell body part B, like the sensing line 810. This is to prevent the sensing line 810 from being damaged by the insulating coolant flowing inside the battery module. Also, this is to accurately sense the temperature of the battery cell 111 by preventing or minimizing contact between the temperature sensor 820 and the insulating coolant.

[0067] The sensing assembly 800 may further include a printed circuit board (PCB) 830 electrically connected to the sensing line 810. The printed circuit board 830 may be fixed on the bus bar frame 121. A connector assembly (not shown) may be mounted on the printed circuit board 830, and a control device such as a battery management system (BMS) (not shown) may be connected through the connector assembly. In this case, the BMS may measure and / or receive information regarding the voltage, temperature, etc. of the battery cell 111 and refer to the information to control charging and discharging of the battery module.

[0068] Meanwhile, a battery pack according to an embodiment of the present invention includes the battery module as described above. The battery pack may further include components such as a pack housing and / or a BMS in addition to at least one battery module according to the present invention.

[0069] The battery module may be fastened to the pack housing through, for example, fastening holes H formed in the front end plate 500 and / or the rear end plate 600. That is, the fastening holes H may provide a space into which a fastening means, such as a bolt, for fastening the pack housing to the battery module is inserted. Meanwhile, when the battery pack includes a plurality of battery modules, the plurality of battery modules may be fastened to each other through the fastening holes H formed in the front end plate 500 and / or the rear end plate 600.

[0070] An automobile according to an embodiment of the present invention includes at least one battery module and / or battery pack as described above. The automobile according to an embodiment of the present invention may be, for example, a hybrid automobile or an electric automobile that operates by receiving power from the battery module and / or battery pack of the present invention.

[0071] As described above, the present invention has been described using limited embodiments and drawings. However, the present invention is not limited thereto, and it goes without saying that various modifications and variations can be made by a person having ordinary knowledge in the technical field to which the present invention belongs within the technical spirit of the present invention and the equivalent scope of the claims. [Explanation of symbols]

[0072] 100: Submodule 110: Cell stack assembly 111: Battery cell 111a: electrode lead B: Cell body part W: Cell wing section 112: Flow path spacer 112a: Coolant flow path 112b: Fixed part 113: Buffer pad 120A: Front busbar frame assembly 120B: Rear busbar frame assembly 121: Busbar frame 121a: Coolant hole 121b: Guide rib 122: Busbar 123: Internal terminal 200:Module housing 300: Front sealing plate 300a: Terminal hole P1: Inlet G: Gasket 400: Rear sealing plate P2: Outlet 500: Front end plate 500a: Exposed terminal part 500b: Inlet exposed part 600: Rear end plate 600b: Exposed outlet 700: Terminal Assembly 710: External terminal 711: Connection part 712: Fastening part 720: Stud 730: Terminal spacer 740: Fastening nut 750: First O-ring 760: Second O-ring 800: Sensing Assembly 810: Sensing Line 820: Temperature sensor 830: Printed circuit boards

Claims

1. a sub-module including a cell stack assembly having a plurality of battery cells; a module housing that houses the sub-module; a front sealing plate covering one longitudinal side opening of the module housing and having an inlet for the inflow of insulating cooling liquid; a rear sealing plate covering the other longitudinal side opening of the module housing and having an outlet for discharging the insulating cooling liquid; a sensing assembly for sensing a voltage of the battery cell; Including, At least a sensing line of the sensing assembly is interposed between a cell body portion of the battery cell and a cell wing portion bent toward the cell body portion, The cell stack assembly further includes a flow path spacer interposed between adjacent battery cells, The flow path spacer includes a coolant flow path extending along a longitudinal direction of the flow path spacer.

2. The battery module according to claim 1 , wherein the sensing assembly is disposed at an upper end of the sub-module.

3. The battery module according to claim 1 , wherein the sensing assembly comprises a sensing line electrically connected to the plurality of battery cells and extending from one end to the other end of the battery cell in a longitudinal direction.

4. The battery module according to claim 3 , wherein the sensing line is interposed between a cell body portion of the battery cell and a cell wing portion bent toward the cell body portion.

5. The battery module of claim 3 , wherein the sensing assembly further includes a temperature sensor mounted on the sensing line.

6. The battery module according to claim 5 , wherein the temperature sensor is interposed between a cell body portion of the battery cell and a cell wing portion bent toward the cell body portion.

7. The sub-module comprises: a front bus bar frame assembly coupled to one side of the cell stack assembly in a longitudinal direction; a rear bus bar frame assembly coupled to the other side of the cell stack assembly in the longitudinal direction; The battery module of claim 1 , further comprising:

8. The front bus bar frame assembly includes: A bus bar frame; a plurality of bus bars fixed on the bus bar frame and connected to electrode leads of the battery cells; The battery module of claim 7 .

9. The battery module according to claim 8 , wherein the bus bar frame comprises a cooling fluid hole.

10. The battery module according to claim 9 , wherein the coolant hole is formed at a position corresponding to the flow path spacer.

11. A battery pack comprising the battery module according to any one of claims 1 to 10.

12. A motor vehicle comprising a battery module according to any one of claims 1 to 10.

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