CN118805285A - Battery Pack - Google Patents

Abstract

According to an example embodiment of the present invention, a battery pack is provided. The battery pack includes: a shell, the shell including a plate portion and a first side wall and a second side wall combined with the plate portion; a plurality of battery assemblies, the plurality of battery assemblies are located on the shell; and a lower supply pipe assembly, the lower supply pipe assembly is located on a first side of the shell, wherein the plate portion includes a plurality of lower cooling channels extending in a first direction, the first side wall includes a first lower recovery channel, the second side wall includes a second lower recovery channel, and the lower supply pipe assembly is connected to the plurality of lower cooling channels.

Description

Battery Pack

Technical Field

The present invention relates to a battery pack. This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0179155 filed on December 20, 2022 and Korean Patent Application No. 10-2023-0029147 filed on March 6, 2023, the entire contents of which are incorporated herein by reference.

Background Art

Unlike primary batteries, secondary batteries can be charged and discharged many times. Secondary batteries have been widely used as energy sources for various types of wireless devices (such as mobile phones, laptops, and cordless vacuum cleaners). Recently, as the manufacturing cost per unit capacity of secondary batteries has been significantly reduced due to the improvement of energy density and economies of scale, and the mileage of electric vehicles (BEVs) has increased to the same level as that of fuel vehicles, the main use of secondary batteries is shifting from mobile devices to mobility.

As secondary batteries are used for mobile travel, the demand for the safety of secondary batteries is increasing. When an incident such as a fire occurs in a secondary battery used for mobile travel, the life of the driver may be in danger, so research on technologies to enhance the safety of secondary batteries is indispensable. In particular, the cooling technology for maintaining the temperature of the secondary battery when it is working is directly related to the life and performance of the secondary battery when it is working and the stability of the secondary battery, so a lot of research is being conducted on the cooling technology of secondary batteries.

Summary of the invention

Technical issues

The present invention aims to provide a battery pack with improved reliability and safety.

Technical Solution

In order to solve the above problems, an exemplary embodiment of the present invention provides a battery pack. The battery pack includes: a shell, the shell includes a plate portion and a first side wall and a second side wall combined with the plate portion; a plurality of battery assemblies, the plurality of battery assemblies are located on the shell; and a lower supply pipe assembly, the lower supply pipe assembly is located on a first side of the shell, wherein the plate portion includes a plurality of lower cooling channels extending in a first direction, the first side wall includes a first lower recovery channel, the second side wall includes a second lower recovery channel, and the lower supply pipe assembly is connected to the plurality of lower cooling channels.

The battery pack may further include a lower supply port disposed at the first side of the housing and connected to the lower supply pipe assembly.

The battery pack may further include a lower exhaust port disposed at the first side of the case and connected with the first lower recovery channel and the second lower recovery channel.

Each of the first side wall and the second side wall may further include an exhaust path configured to exhaust gas exhausted from the battery assembly.

The battery pack may further include a lower recovery duct assembly disposed on a second side of the case opposite to the first side and configured to connect the plurality of lower cooling channels with the first lower recovery channel and the second lower recovery channel.

The lower supply pipe assembly and the lower recovery pipe assembly may connect a plurality of lower cooling channels in parallel.

The first side wall may further include a first upper recovery channel on the first lower recovery channel.

The second side wall may further include a second upper recycling channel on the second lower recycling channel.

The battery pack may further include an upper cooling device disposed on the battery assembly and including a plurality of upper cooling channels.

The battery pack may further include an upper supply duct assembly disposed at the first side of the housing and connected to the plurality of upper cooling channels.

The upper supply pipe assembly may connect a plurality of upper cooling channels in parallel.

The battery pack may further include an upper supply port disposed at the first side of the housing and connected to the upper supply tube assembly.

The battery pack may further include an upper exhaust port disposed at the first side of the case and connected with the first upper recovery channel and the second upper recovery channel.

The battery pack may further include an upper recovery channel configured to connect the plurality of upper cooling channels with the first upper recovery channel and the second upper recovery channel.

An upper recovery tube assembly may be located on the second side of the housing.

Beneficial Effects

The battery pack according to the exemplary embodiment of the present invention may include a recovery channel of the cooling fluid buried in the side wall of the battery pack, so that one side of the battery pack can be cooled during the recovery of the cooling fluid, and the cooling system can be implemented in a relatively narrow space. In addition, each of the input port and the output port of the cooling port is placed on one side of the battery pack, so the flow path design of the cooling system can be simplified.

The effects that can be achieved by the exemplary embodiments of the present invention are not limited to the above effects, and those skilled in the art to which the exemplary embodiments of the present invention belong will clearly derive and understand other effects not described herein based on the following description. That is, those skilled in the art can derive the unexpected effects achieved when implementing the exemplary embodiments of the present invention based on the exemplary embodiments of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view illustrating a battery pack according to an example embodiment.

FIG. 2 is a plan view illustrating a battery pack according to example embodiments.

FIG3 is a cross-sectional view taken along line 1A-1A' of FIG2.

FIG4 is a perspective view including a cross section taken along line 1B-1B' of FIG2.

FIG5 is a perspective view including a cross section taken along line 1C-1C' of FIG2.

FIG. 6 is a plan view illustrating a battery pack according to example embodiments.

FIG. 7 is a perspective view including a cross section taken along line 6B-6B' of FIG. 6 .

DETAILED DESCRIPTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Before describing the embodiments of the present invention, the terms or expressions used in this specification and claims should not be interpreted as limited to the terms or expressions generally understood or defined in a commonly used dictionary, but should be understood based on the inventor of the present application can appropriately define the terms or expressions to best explain the principle of the present invention, according to the meaning and concept corresponding to the present invention.

Therefore, the embodiments described herein and the configurations shown in the accompanying drawings are merely examples of the present invention and do not reflect all technical concepts of the present invention. Therefore, it should be understood that various equivalents and modifications have been made to replace the configurations on the filing date of the present application.

When it is determined that known configurations or functions related to describing the present invention would obscure the subject matter of the present invention due to unnecessary details, such configurations or functions are not described in detail.

Since the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the shapes, sizes, etc. of the components shown in the drawings may be magnified, omitted, or schematically illustrated for the sake of clarity. Therefore, it should not be understood that the sizes or ratios of the components fully reflect their actual sizes or ratios.

(First embodiment)

FIG. 1 is a plan view illustrating a battery pack according to an example embodiment.

Fig. 2 is a plan view illustrating a battery pack according to an example embodiment. In Fig. 2, a plurality of cooling channels 111CH buried in a case 110 and first and second recovery channels 112CH and 113CH are indicated by dotted lines.

FIG3 is a cross-sectional view taken along line 1A-1A' of FIG2.

FIG4 is a perspective view including a cross section taken along line 1B-1B' of FIG2.

FIG5 is a perspective view including a cross section taken along line 1C-1C' of FIG2.

1 to 5 , a battery pack 100 may include a housing 110, a plurality of battery assemblies 120, a middle beam 131, a plurality of cross beams 133, an injection port 210, a supply pipe assembly 220, a recovery pipe assembly 230, a recovery port 240, and a discharge port 250. The battery pack 100 is a final form of a battery system mounted on a vehicle or the like.

The housing 110 may include a plate portion 111, a first side wall 112, a second side wall 113, a third side wall 114, and a fourth side wall 115. Two directions substantially parallel to the plate portion 111 are defined as an X-axis direction and a Y-axis direction, and a direction substantially perpendicular to the plate portion 111 is defined as a Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction may be substantially perpendicular to each other. Unless otherwise specified, the definition of directions will apply to the following drawings.

A battery region BR and an electronic component region ER may be defined on the board portion 111. A plurality of battery assemblies 120 may be located in the battery region BR. Electronic components may be located in the electronic component region ER.

According to an example embodiment, the plate portion 111 may include a plurality of cooling channels 111CH and a plurality of cavities 111C. As a non-limiting example, the plate portion 111 may be provided by an extrusion process. According to an example embodiment, the plate portion 111 may be provided by welding (e.g., friction stir welding) a plurality of plates, and thus include a bonding surface JS of the plurality of plates.

According to example embodiments, a plurality of cooling channels 111CH may be configured to provide a path for a cooling fluid to flow therein. The cooling fluid is a fluid such as water, air, or a refrigerant for cooling a plurality of battery assemblies 120. A plurality of cooling channels 111CH may be spaced apart from each other in the Y-axis direction. A plurality of cooling channels 111CH may be arranged in the Y-axis direction. A plurality of cooling channels 111CH may be interposed between a plurality of cavities 111C. Each of the plurality of cooling channels 111CH may be referred to as a lower cooling channel.

The plurality of cavities 111C are hollow spaces formed in the plate portion 111. By forming the plurality of cavities 111C, the mass of the plate portion 111 may be reduced, thereby improving the energy density of the battery pack 100. The plurality of cavities 111C may be spaced apart from each other in the Y-axis direction.

A plurality of battery assemblies 120 may be disposed on the plate portion 111 of the housing 110. The plate portion 111 may support the plurality of battery assemblies 120. The plate portion 111 may include an upper surface and a lower surface that are substantially parallel to each other. The upper surface of the plate portion 111 may face the plurality of battery assemblies 120. The lower surface of the plate portion 111 is opposite to the upper surface of the plate portion 111.

The first side wall 112, the second side wall 113, the third side wall 114, and the fourth side wall 115 may horizontally surround the plurality of battery assemblies 120. The first side wall 112, the second side wall 113, the third side wall 114, and the fourth side wall 115 may protect the plurality of battery assemblies 120. The first side wall 112, the second side wall 113, the third side wall 114, and the fourth side wall 115 may be fixed to each other by a method such as friction stir welding or spot welding.

The first side wall 112 and the second side wall 113 may be substantially perpendicular to the Y-axis direction. The third side wall 114 may be substantially perpendicular to the X-axis direction. The fourth side wall 115 may include a portion substantially perpendicular to the X-axis direction and a portion substantially perpendicular to the Y-axis direction. The first side wall 112 and the second side wall 113 may cover the side of the plate portion 111. The third side wall 114 and the fourth side wall 115 may be located on the plate portion 111.

According to example embodiments, the first side wall 112, the second side wall 113, the third side wall 114, and the fourth side wall 115 may be provided by an extrusion process. According to example embodiments, the first side wall 112, the second side wall 113, the third side wall 114, and the fourth side wall 115 may each include an internal hollow space similar to the second side wall 113 of FIG. 5. Therefore, the weight of the first side wall 112, the second side wall 113, the third side wall 114, and the fourth side wall 115 may be reduced, and the energy density of the battery pack 100 may be increased.

According to example embodiments, a portion of the hollow space of the first sidewall 112, the second sidewall 113, the third sidewall 114, and the fourth sidewall 115 may be a gas exhaust path 113VP. The first sidewall 112 and the second sidewall 113 may be provided by an extrusion process. The hollow space of each of the first sidewall 112 and the second sidewall 113 may extend in the X-axis direction.

According to example embodiments, the first sidewall 112 may include a first recycling channel 112CH in a portion of a hollow space of the first sidewall 112. The first recycling channel 112CH may be buried in the first sidewall 112. According to example embodiments, the second sidewall 113 may include a second recycling channel 113CH in a portion of a hollow space of the second sidewall 113. The second recycling channel 113CH may be buried in the second sidewall 113. The first recycling channel 112CH may be referred to as a first lower recycling channel, and the second recycling channel 133CH may be referred to as a second lower recycling channel.

The battery assembly 120 may include a plurality of battery cells. According to some embodiments, the battery assembly 120 may include a module frame surrounding the plurality of battery cells. According to some embodiments, the battery assembly 120 may not include a module frame.

A battery cell is the basic unit of a lithium-ion battery (i.e., a secondary battery). A battery cell includes an electrode assembly, an electrolyte, and a housing. According to the configuration of the electrode assembly and the electrolyte, the battery cell is divided into a lithium-ion battery, a lithium-ion polymer battery, a lithium polymer battery, and the like. The market share of lithium-ion polymer batteries in the field of secondary batteries is increasing due to the low possibility of electrolyte leakage and the ease of manufacturing.

According to the shape of the battery case, the battery cells are classified into cylindrical batteries in which the electrode assembly is built in a cylindrical metal can, square batteries in which the electrode assembly is built in a square metal can, and pouch-type batteries in which the electrode assembly is built in a pouch case of an aluminum laminate.

The electrode assembly included in the battery case includes a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. According to the form of assembly, the electrode assembly can be classified as a jelly roll type electrode assembly or a stacked type electrode assembly. The jelly roll type electrode assembly is manufactured by winding the positive electrode, the negative electrode, and the separator interposed between the positive electrode and the negative electrode. The stacked type electrode assembly includes a plurality of positive electrodes, a plurality of negative electrodes, and a plurality of separators interposed therebetween stacked in sequence.

The middle beam 131 may isolate the elements on the housing 110 from each other. Therefore, the middle beam 131 may prevent an undesired short circuit from occurring between the plurality of battery assemblies 120 while protecting the plurality of battery assemblies 120.

The middle beam 131 may extend between the third side wall 114 and one of the plurality of beams 133 (e.g., the beam 133 farthest from the third side wall 114). The middle beam 131 may extend in the X-axis direction. The middle beam 131 may contact the third side wall 114 and the plurality of beams 133. The middle beam 131 may isolate the plurality of battery assemblies 120 from each other. The middle beam 131 may be interposed between the plurality of battery assemblies 120.

Each of the plurality of beams 133 may extend between the first side wall 112 and the middle beam 131 or between the second side wall 113 and the middle beam 131. Each of the plurality of beams 133 may contact the first side wall 112 or the second side wall 113. Each of the plurality of beams 133 may extend in the Y-axis direction. The plurality of beams 133 may isolate the plurality of battery assemblies 120 from each other. The plurality of beams 133 may be interposed between the plurality of battery assemblies 120.

The arrangement of the middle beam 131, the plurality of cross beams 133, and the plurality of battery assemblies 120 shown in FIG1 is a non-limiting example, and therefore should not be understood as limiting the technical concept of the present invention in any sense. According to the above description, a person skilled in the art will easily derive a battery pack including various numbers and arrangements of middle beams, cross beams, and battery assemblies.

The cooling fluid may be supplied to the supply pipe assembly 220 through the injection port 210. Each injection port 210 may be referred to as a lower injection port. The injection port 210 may be connected to a cooling fluid source (eg, a cooling system of a vehicle). The injection port 210 may provide a flow path for the cooling fluid.

The cooling fluid may be supplied to the plurality of cooling channels 111CH through a supply pipe assembly 220 . The supply pipe assembly 220 may be referred to as a lower supply pipe assembly. The supply pipe assembly 220 may include a plurality of supply pipes 221 , a plurality of connectors 223 , and a plurality of connection pipes 225 .

A plurality of supply pipes 221 may be connected to the injection port 210. A plurality of supply pipes 221 may be connected in parallel to each other. A plurality of connectors 223 may be connected to a plurality of supply pipes 221 or a plurality of connecting pipes 225. A plurality of connecting pipes 225 may connect a plurality of connectors 223 to each other. A plurality of connectors 223 may each be connected to a corresponding one of a plurality of cooling channels 111CH. Therefore, a plurality of cooling channels 111CH may be connected in parallel according to the movement of the cooling fluid to reduce the pressure drop according to the path of the cooling fluid. Additional pipes may also be provided between the plurality of connectors 223 and the plurality of cooling channels 111CH to connect the plurality of connectors 223 to the plurality of cooling channels 111CH.

The cooling fluid may cool the plurality of battery assemblies 120 while flowing along the plurality of cooling channels 111CH. The cooling fluid flowing along the plurality of cooling channels 111CH may be recovered by the recovery pipe assembly 230. The recovery pipe assembly 230 may also be referred to as a lower recovery pipe assembly. The cooling fluid recovered by the recovery pipe assembly 230 may flow to the recovery port 240. Each recovery port 240 may be referred to as a lower recovery port. The recovery pipe assembly 230 may include a plurality of recovery pipes 231, a plurality of connectors 233, and a plurality of connecting pipes 235.

A plurality of recovery pipes 231 may be connected to the recovery port 240. A plurality of recovery pipes 231 may be connected in parallel to each other. A plurality of connectors 233 may be connected to a plurality of recovery pipes 231 or a plurality of connecting pipes 235. A plurality of connecting pipes 235 may connect a plurality of connectors 233 to each other. A plurality of connectors 233 may each be connected to a corresponding one of a plurality of cooling channels 111CH. Additional pipes may also be provided between the plurality of connectors 233 and the plurality of cooling channels 111CH to connect the plurality of connectors 233 to the plurality of cooling channels 111CH.

The cooling fluid may be discharged to a cooling fluid radiator (e.g., a cooling system of a vehicle) through the recovery port 240, the first recovery channel 112CH, the second recovery channel 113CH, and the discharge port 250. Each discharge port 250 may be referred to as a lower discharge port. The cooling fluid may cool the plurality of battery assemblies 120 while flowing along the first recovery channel 112CH and the second recovery channel 113CH. Therefore, the number of surfaces of the plurality of battery assemblies 120 to be cooled increases, thereby improving the cooling performance of the battery pack 100.

According to an example embodiment, the injection port 210 and the exhaust port 250 may be located on the same side of the housing 110. More specifically, the injection port 210 and the exhaust port 250 may be located on the side where the third side wall 114 of the housing 110 is located. Because the injection port 210 and the exhaust port 250 are located on the same side of the housing 110, the design of the flow path of the cooling system that supplies cooling fluid to the battery pack 100 can be simplified. One side of the housing 110 adjacent to the third side wall 114 is defined as a first side, and one side of the housing 110 adjacent to the fourth side wall is defined as a second side. The first side and the second side may be spaced apart from each other in the X-axis direction and are opposite to each other.

The battery pack 100 may further include a plurality of exhaust devices. The plurality of exhaust devices may be connected to the exhaust path 113VP. The exhaust path 113VP may be a path for exhausting gas and heat from the inside of the battery pack 100.

The plurality of exhaust devices may be configured to retard heat propagation by exhausting high temperature gas from the inside of the battery pack 100 to the outside when at least one of the plurality of battery assemblies 120 is in a thermal runaway state.

Here, the thermal runaway state of the plurality of battery assemblies 120 is a state in which the temperature change of the plurality of battery assemblies 120 accelerates the temperature change, that is, runaway positive feedback. The temperature of the plurality of battery assemblies 120 in the thermal runaway state rises sharply, and a large amount of high-pressure gas and burning fragments are discharged.

The battery pack 100 may further include electronic components. The electronic components may be located in the electronic component region ER. The electronic components may include electronic devices required to drive the battery pack 100.

For example, the electronic components may include a battery management system (BMS). The BMS may be configured to monitor, balance, and control the battery pack 100. Monitoring of the battery pack 10 may include measuring voltages and currents of certain nodes within the plurality of battery assemblies 120 and measuring temperatures at set locations in the battery pack 100. The battery pack 100 may include measuring instruments for measuring voltage, current, and temperature as described above.

The balancing of the battery pack 100 is an operation to reduce the deviation between the plurality of battery assemblies 120. The control of the battery pack 100 includes preventing overcharge, overdischarge and overcurrent. Through monitoring, balancing and control, the battery pack 100 can operate under optimal conditions, thereby preventing the life of each of the plurality of battery assemblies 120 from being shortened.

The electronic components may also include: a cooling device, a power relay assembly (PRA), a safety plug, etc. The cooling device may include a cooling fan. The cooling fan may circulate air in the battery pack 100 to prevent overheating of each of the multiple battery assemblies 120. The PRA may be configured to supply power to an external load (e.g., a motor of a vehicle) or cut off power supply from the high-voltage battery. When an abnormal voltage such as a voltage surge occurs, the PRA may cut off power supply to an external load (e.g., a motor of a vehicle) to protect the multiple battery assemblies 120 and the external load (e.g., a motor of a vehicle).

The battery pack 100 may further include a plurality of bus bars configured to be electrically connected to the plurality of battery assemblies 120. The plurality of battery assemblies 120 may be connected in series through the plurality of bus bars. Thus, the battery pack 100 may be configured to output a high voltage to an external load (eg, a motor of a vehicle).

The battery pack 100 may further include a cover plate combined with the case 110. The cover plate may cover the electronic components and the battery assembly 120.

(Second embodiment)

FIG. 6 is a plan view illustrating a battery pack 100' according to an example embodiment.

FIG. 7 is a perspective view including a cross section taken along line 6B-6B' of FIG. 6 .

1, 6 and 7, the battery pack 100' is substantially the same as the battery pack 100 except that the housing 110 is replaced with the housing 110' and the cooling device 140, the injection port 310, the supply pipe assembly 320, the recovery pipe assembly 330, the recovery port 340 and the discharge port 350 are further provided. Therefore, the battery pack 100' may include a plurality of battery assemblies 120, a middle beam 131, a plurality of cross beams 133, an injection port 210, a supply pipe assembly 220, a recovery pipe assembly 230, a recovery port 240 and a discharge port 250, and redundant descriptions thereof are omitted.

The housing 110' may include a plate portion 111, a first side wall 112', a second side wall 113', a third side wall 114, and a fourth side wall 115. The plate portion 111, the third side wall 114, and the fourth side wall 115 are substantially the same as those described above with reference to FIGS. 1 to 5 .

The first side wall 112' is the same as the first side wall 112 except that an additional first recycling channel 112CH' is included therein (see Figure 1). The second side wall 113' is the same as the second side wall 113 except that an additional second recycling channel 113CH' is included therein (see Figure 1). The first recycling channel 112CH' and the second recycling channel 113CH' can be located in the inner hollow space of the first side wall 112' and the second side wall 113'. The first recycling channel 112CH' can be referred to as the first upper recycling channel, and the second recycling channel 133CH' can be referred to as the second upper recycling channel.

The cooling device 140 may cover the plurality of battery assemblies 120 (see FIG. 1 ). The cooling device 140 may cool the upper portion of the plurality of battery assemblies 120 (see FIG. 1 ), thereby improving the cooling performance of the battery pack 100 '. For example, the cooling device 140 may be provided by an extrusion process. The cooling device 140 may include a plurality of cooling channels 140CH extending in the X-axis direction. The plurality of cooling channels 140CH may be referred to as upper cooling channels.

The cooling fluid may be supplied to the supply pipe assembly 320 through the injection port 310. Each injection port 310 may be referred to as an upper injection port. The injection port 310 may be connected to a cooling fluid source (e.g., a cooling system of a vehicle). The injection port 310 may provide a flow path for the cooling fluid.

The cooling fluid may be supplied to the plurality of cooling channels 140CH through the supply pipe assembly 320. The supply pipe assembly 220 may be referred to as an upper supply pipe assembly. The supply pipe assembly 320 may include a plurality of supply pipes 321, a plurality of connectors 323, and a plurality of connection pipes 325.

A plurality of supply pipes 321 may be connected to the injection port 310. A plurality of supply pipes 321 may be connected in parallel to each other. A plurality of connectors 323 may be connected to a plurality of supply pipes 321 or a plurality of connecting pipes 325. A plurality of connecting pipes 325 may connect a plurality of connectors 323 to each other. A plurality of connectors 323 may each be connected to a corresponding one of a plurality of cooling channels 140CH. Therefore, a plurality of cooling channels 140CH may be connected in parallel according to the movement of the cooling fluid to reduce the pressure drop according to the path of the cooling fluid. Additional pipes may also be provided between the plurality of connectors 323 and the plurality of cooling channels 140CH to connect the plurality of connectors 323 to the plurality of cooling channels 140CH.

The cooling fluid can cool the multiple battery assemblies 120 while flowing along the multiple cooling channels 140CH. The cooling fluid flowing along the multiple cooling channels 140CH can be recovered by the recovery pipe assembly 330. The recovery pipe assembly 330 can also be referred to as an upper recovery pipe assembly. The cooling fluid recovered by the recovery pipe assembly 330 can flow to the recovery port 340. Each recovery port 340 can be referred to as an upper recovery port. The recovery pipe assembly 330 may include a plurality of recovery pipes 331, a plurality of connectors 333, and a plurality of connecting pipes 335.

A plurality of recovery pipes 331 may be connected to the recovery port 340. A plurality of recovery pipes 331 may be connected in parallel to each other. A plurality of connectors 333 may be connected to a plurality of recovery pipes 331 or a plurality of connecting pipes 335. A plurality of connecting pipes 335 may connect a plurality of connectors 333 to each other. A plurality of connectors 333 may each be connected to a corresponding one of a plurality of cooling channels 140CH. Additional pipes may also be provided between the plurality of connectors 333 and the plurality of cooling channels 140CH to connect the plurality of connectors 333 to the plurality of cooling channels 140CH.

The cooling fluid may be discharged to the outside (e.g., a cooling system of a vehicle) through the recovery port 340, the first recovery channel 112CH, the second recovery channel 113CH, and the discharge port 350. Each discharge port 350 may be referred to as an upper discharge port. The cooling fluid may cool the plurality of battery assemblies 120 while flowing along the first recovery channel 112CH and the second recovery channel 113CH. Therefore, the number of surfaces of the plurality of battery assemblies 120 to be cooled increases, thereby improving the cooling performance of the battery pack 100'.

According to an example embodiment, the injection port 310 and the exhaust port 350 may be located on the same side of the housing 110'. More specifically, the injection port 310 and the exhaust port 350 may be located on the side where the third sidewall 114 of the housing 110' is located. Because the injection port 310 and the exhaust port 350 are located on the same side of the housing 110', the flow path design of the cooling system that supplies cooling fluid to the battery pack 100' can be simplified.

The present invention has been described in detail above with reference to the accompanying drawings, embodiments, etc. However, the configurations shown in the drawings or embodiments described in the present invention are only embodiments of the present invention and do not reflect all technical concepts of the present invention, and therefore, it should be understood that various equivalents and modifications have been made to replace the configurations on the filing date of the present application.

Claims (14)

1. A battery pack, comprising:

a housing including a plate portion, a first side wall and a second side wall coupled to the plate portion;

A plurality of battery assemblies located on the housing; and

A lower supply tube assembly located on a first side of the housing,

Wherein the plate portion includes a plurality of lower cooling passages extending in a first direction,

The first sidewall includes a first lower recovery channel,

The second side wall includes a second lower recovery channel, and

The lower supply tube assembly is connected with the plurality of lower cooling passages.

2. The battery pack of claim 1, further comprising a lower supply port disposed on the first side of the housing and connected with the lower supply tube assembly.

3. The battery pack of claim 1, further comprising a lower drain port disposed on the first side of the housing and connected with the first lower recovery channel and the second lower recovery channel.

4. The battery pack of claim 1, wherein each of the first and second sidewalls further comprises a vent path configured to vent gas vented from the battery assembly.

5. The battery pack of claim 1, further comprising a lower recovery tube assembly disposed on a second side of the housing opposite the first side and configured to connect the plurality of lower cooling channels with the first lower recovery channel and the second lower recovery channel.

6. The battery pack of claim 5, wherein the lower supply tube assembly and the lower recovery tube assembly connect the plurality of lower cooling channels in parallel.

7. The battery pack of claim 1, wherein the first sidewall further comprises a first upper recycling channel on the first lower recycling channel, and

The second sidewall further includes a second upper recovery channel on the second lower recovery channel.

8. The battery pack of claim 7, further comprising an upper cooling device disposed on the battery assembly and comprising a plurality of upper cooling channels.

9. The battery pack of claim 8, further comprising an upper supply tube assembly disposed on the first side of the housing and connected with the plurality of upper cooling channels.

10. The battery pack of claim 9, wherein the upper supply tube assembly connects the plurality of upper cooling channels in parallel.

11. The battery pack of claim 9, further comprising an upper supply port disposed on the first side of the housing and connected with the upper supply tube assembly.

12. The battery pack of claim 9, further comprising an upper drain port disposed on the first side of the housing and connected with the first upper recovery channel and the second upper recovery channel.

13. The battery pack of claim 8, further comprising an upper recovery channel configured to connect the plurality of upper cooling channels with the first upper recovery channel and the second upper recovery channel.

14. The battery pack of claim 13, wherein the upper recovery tube assembly is located on the second side of the housing.