Vehicle battery pack

Abstract

A vehicle battery pack includes multiple battery modules and a first cooling jacket, the first cooling jacket having channels for the flow of a cooling medium. Each of the multiple battery modules includes a battery, a power conversion module for converting power from the battery, and a busbar connecting the battery and the power conversion module. The busbar can be integrally formed with the first cooling jacket by contacting it.

Description

[0001] Cross-reference to related applications This application claims priority to Korean Patent Application No. 10-2025-0038883, filed on March 26, 2025, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. Technical Field

[0002] This disclosure relates to a vehicle battery pack. Background Technology

[0003] Typically, environmentally friendly vehicles include a battery pack with multiple batteries and a power conversion module (e.g., an inverter or converter). The battery pack and power conversion module are connected via busbars.

[0004] Recently, with the increase in the output power of environmentally friendly vehicles, it is necessary to improve cooling performance by using differentiated cooling for batteries and power conversion modules. Summary of the Invention

[0005] According to various aspects of this disclosure, this disclosure provides a vehicle battery pack in which the cooling performance of the busbar can be improved, thereby reducing the cross-sectional area of ​​the busbar and thus reducing the cost and weight of the busbar.

[0006] According to various aspects of this disclosure, this disclosure provides a vehicle battery pack in which the cooling performance of the battery and power conversion module can be improved.

[0007] According to various aspects of this disclosure, this disclosure provides a vehicle battery pack in which the cooling structure can be simplified and the focus can be on cooling the battery during charging, thereby reducing costs while ensuring charging speed and stability.

[0008] According to various aspects of this disclosure, this disclosure provides a vehicle battery pack in which the cooling performance of the power conversion module and the battery can be differentially controlled.

[0009] According to various aspects of this disclosure, a vehicle battery pack includes a plurality of battery modules; and a first cooling jacket having internal channels for the flow of a cooling medium. Each of the plurality of battery modules includes a battery; and a power conversion module that converts power from the battery, and the power conversion module is in contact with a first surface of the first cooling jacket, and the battery is in contact with a second surface of the first cooling jacket.

[0010] According to various aspects of this disclosure, the flow channels can be configured to provide differentiated cooling for the power conversion module and the battery.

[0011] According to various aspects of this disclosure, the flow channel can be configured such that the flow channel area adjacent to the power conversion module is smaller than the flow channel area adjacent to the battery.

[0012] According to various aspects of this disclosure, the flow channel may include a plurality of first flow channels having a trapezoidal cross-section.

[0013] According to various aspects of this disclosure, the flow channel may include a single second flow channel having a quadrilateral cross-section, and the distance between the second flow channel and the battery may be shorter than the distance between the second flow channel and the power conversion module.

[0014] According to various aspects of this disclosure, the flow channel may include a single third flow channel having a trapezoidal cross-section.

[0015] According to various aspects of this disclosure, the thermal resistance of the heat transfer medium disposed between the first cooling jacket and the battery can be lower than the thermal resistance of the heat transfer medium disposed between the first cooling jacket and the power conversion module.

[0016] According to various aspects of this disclosure, the vehicle battery pack may also include a second cooling jacket that contacts the lower surface of the plurality of battery modules and has internal channels for the flow of cooling medium.

[0017] According to various aspects of this disclosure, the battery and the first cooling jacket, the first cooling jacket and the power conversion module, and the second cooling jacket and the plurality of battery modules can be in contact with each other through a heat transfer medium.

[0018] According to various aspects of this disclosure, the flow rate of the cooling medium flowing through the flow channel disposed inside the second cooling jacket and the flow rate of the cooling medium flowing through the flow channel disposed inside the first cooling jacket can be adjusted independently.

[0019] According to various aspects of this disclosure, the power conversion module may include at least one of a DC / DC converter and a DC / AC inverter.

[0020] According to various aspects of this disclosure, a vehicle battery pack includes a plurality of battery modules, a first cooling jacket, and a second cooling jacket. The first cooling jacket has internal channels for the flow of a cooling medium, and the second cooling jacket also has internal channels for the flow of a cooling medium. Each of the plurality of battery modules includes a battery; a power conversion module that converts power from the battery; and a busbar connecting the battery and the power conversion module. The first cooling jacket includes an opening through which the busbar passes, the busbar contacting a side surface of the opening and an upper surface of the first cooling jacket. The power conversion module contacts one surface of the first cooling jacket, the battery is in close contact with another surface of the first cooling jacket, the plurality of battery modules contact the upper surface of the second cooling jacket, and the channels provide differentiated cooling for the power conversion module and the battery. Attached Figure Description

[0021] The above and other aspects, features and advantages of this disclosure will become more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a perspective view of a vehicle battery pack according to an exemplary embodiment of the present disclosure; Figure 2A yes Figure 1 Top view of the battery pack shown; Figure 2B It was viewed from the side. Figure 1 A cross-sectional view of the battery pack shown. Figure 2C This is a schematic diagram of the internal flow channel of the first cooling jacket according to an exemplary embodiment of the present disclosure; Figure 3A and Figure 3B This is a schematic diagram of the internal flow channel of the first cooling jacket according to another exemplary embodiment of the present disclosure; Figure 4 This is a schematic diagram of a first busbar integrally disposed with a first cooling jacket through contact, according to an exemplary embodiment of this disclosure; and Figure 5 This is an example circuit diagram of a battery module according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0022] Detailed embodiments will be described below with reference to the accompanying drawings. The following detailed description is intended to facilitate a thorough understanding of the methods, apparatus, and / or systems described herein. However, these are merely examples, and this disclosure is not limited thereto.

[0023] In describing embodiments, detailed descriptions of known technologies related to this disclosure will be omitted if it is believed that such detailed descriptions would unnecessarily obscure the spirit of this disclosure. Furthermore, the terms described below are defined in consideration of their function in this disclosure and may vary depending on the intent or practice of the user or operator. Therefore, their definitions should be based on the overall content of this specification. The terms used in this detailed description are for descriptive purposes only and should not be considered limiting in any way. Unless explicitly stated otherwise, the singular form includes the plural form. In this description, expressions such as “comprising” or “having” are intended to indicate the presence of certain features, numbers, steps, operations, elements, or portions or combinations thereof, and should not be construed as excluding the presence or possibility of one or more other features, numbers, steps, operations, elements, or portions or combinations thereof.

[0024] Figure 1 This is a perspective view of a vehicle battery pack according to an exemplary embodiment of the present disclosure. Furthermore, Figure 2A yes Figure 1 Top view of the battery pack shown. Figure 2B It was viewed from the side. Figure 1 The cross-sectional view of the battery pack shown. Figure 2C This is a schematic diagram of the internal flow channel of the first cooling jacket according to an exemplary embodiment of the present disclosure.

[0025] like Figure 1 , Figure 2A , Figure 2B and Figure 2C As shown, a vehicle battery pack 100 according to various exemplary embodiments of this disclosure may include a plurality of battery modules 110a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, 110i, 110j, 110k and 110l, a first cooling jacket 300 and a second cooling jacket 200. Although Figure 1 Twelve battery modules are shown, but it should be noted that this is for the purpose of understanding this disclosure and is not limited to a specific number.

[0026] Multiple battery modules 110a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, 110i, 110j, 110k, and 110l may include three single-phase battery module systems 110-1, 110-2, and 110-3. Furthermore, the three single-phase battery module systems 110-1, 110-2, and 110-3 may include inverter output terminals (see description below) connected via a first busbar 115. Figure 5 The three-phase (A-phase, B-phase, C-phase) AC system output terminals are configured by connecting 413 and 414 in series. The three-phase (A-phase, B-phase, C-phase) AC system output terminals can output different AC voltages with the same amplitude and phase difference.

[0027] For example, the output terminals of a three-phase (A, B, C) AC system can output different AC voltages with a 120-degree phase difference. Therefore, the output terminals of a three-phase (A, B, C) AC system can output three-phase AC voltages and provide drive voltage to a motor that uses three-phase AC voltages as drive voltages.

[0028] The aforementioned first busbar 115 is disposed on the side of the battery module and can contact the first cooling sleeve 300. However, this is not limited to this configuration; the first busbar 115 can be disposed away from the first cooling sleeve 300 so as not to contact the first cooling sleeve 300, and therefore can be cooled by air cooling.

[0029] Multiple battery modules 110a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, 110i, 110j, 110k, and 110l each include the same structure. The following description focuses on the structure of a single battery module 110a.

[0030] The battery module 110a may include a battery 111, a power conversion module 112 for converting the power from the battery 111, and a second busbar 113.

[0031] The second cooling jacket 200 is tightly adhered to the lower surface of the battery modules 110a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, 110i, 110j, 110k and 110l, and may include internally configured channels for the flow of cooling medium.

[0032] The cooling medium can be introduced through inlet 200a, circulates along the flow channels provided inside the jacket across the entire surface of the second cooling jacket 200, and then exits through outlet 200b. Although the cooling medium can be a coolant, other cooling media can also be used.

[0033] Simultaneously, the battery 111 can be attached to one surface of the first cooling jacket 300, and the power conversion module 112 can be attached to the other surface of the first cooling jacket 300. Furthermore, a flow channel 300c for the flow of cooling medium can be provided inside the first cooling jacket 300. Although the accompanying drawings show the battery 111 attached to the lower surface of the first cooling jacket 300 and the power conversion module 112 attached to the upper surface of the first cooling jacket 300, it should be understood that, according to the exemplary embodiments of this disclosure, the battery 111 can be attached to the upper surface of the first cooling jacket 300, and the power conversion module 112 can be attached to the lower surface of the first cooling jacket 300. The cooling medium can be introduced through the inlet 300a, circulate along the flow channel therein across the entire surface of the first cooling jacket 300, and then be discharged through the outlet 300b.

[0034] The aforementioned flow channel 300c can be configured to provide differentiated cooling for the power conversion module 112 and the battery 111, and the thermal resistance between the first cooling jacket 300 and the battery 111 can be less than the thermal resistance between the first cooling jacket 300 and the power conversion module 112. Alternatively, the aforementioned flow channel 300c can be configured such that the flow channel area adjacent to the power conversion module 112 is smaller than the flow channel area adjacent to the battery 111.

[0035] Therefore, according to exemplary embodiments of this disclosure, such as Figure 2C As shown, the flow channel 300c may include a plurality of first flow channels 300c having trapezoidal cross-sections, and the width direction length (A) of the flow channel 300c adjacent to the power conversion module 112 may be formed to be smaller than the width direction length (B) of the flow channel adjacent to the battery 111. In the present case, the distance (C) between the first flow channel 300c and the power conversion module 112 may be configured to be less than or equal to the distance (D) between the first flow channel 300c and the battery 111.

[0036] Alternatively, according to exemplary embodiments of this disclosure, such as Figure 3AAs shown, the flow channel may include a single second flow channel 300c with a quadrilateral cross-section, but the distance L1 between the second flow channel 300c and the battery 111 may be configured to be shorter than the distance L2 between the second flow channel 300c and the power conversion module 112.

[0037] Alternatively, according to exemplary embodiments of this disclosure, such as Figure 3B As shown, the flow channel may include a single third flow channel 300c with a trapezoidal cross-section. In the present case, in the third flow channel 300c, the width direction length A of the flow channel adjacent to the power conversion module 112 can be configured to be less than the width direction length B of the flow channel adjacent to the battery 111.

[0038] This configuration allows for differentiated control of the cooling performance of the power conversion module and the battery.

[0039] Alternatively, according to exemplary embodiments of this disclosure, such as Figure 2C , Figure 3A and Figure 3B As shown, the thermal resistance of the heat transfer medium 114b disposed between the first cooling jacket 300 and the battery 111 can be less than the thermal resistance of the heat transfer medium 114c disposed between the first cooling jacket 300 and the power conversion module 112.

[0040] This configuration allows for differentiated control of the cooling performance of the power conversion module and the battery.

[0041] Meanwhile, the first cooling jacket 300 may include an opening 300d through which the second busbar 113 passes. The second busbar 113 can be connected to the battery 111 and the power conversion module 112 through the opening 300d. This second busbar 113 can be integrally formed with the first cooling jacket 300.

[0042] Figure 4 This is a schematic diagram of a second busbar integrated with the first cooling jacket according to an exemplary embodiment of this disclosure. The second busbar 113 can connect the battery 111 and the power conversion module 112.

[0043] like Figure 4 As shown, the second busbar 113 includes a conductor 113a, such as copper, and an insulating medium 113b (e.g., an insulating sheath, insulating paper, etc.) for insulating the conductor 113a. One side of the second busbar 113 can be threaded to the battery 111 via a groove 113d, and the other side can be threaded to the power conversion module 112 via a groove 113c.

[0044] According to an exemplary embodiment of this disclosure, the second busbar 113 can be integrally disposed with the first cooling jacket 300 by contacting it.

[0045] like Figure 2AAs shown, the second busbar 113 can contact the side surface of the opening 300d, extend along the side surface of the opening 300d, and then bend to contact the upper surface of the first cooling jacket 300. Additionally, the second busbar 113 and the side surface of the opening 300d, as well as the second busbar 113 and the side surface of the first cooling jacket 300, can contact each other via the heat transfer medium 114d. The second busbar 113 and the side surface of the power conversion module 112 can also contact each other via the heat transfer medium 114d.

[0046] Refer again Figure 2B The second cooling jacket 200 and multiple battery modules 110a, 110b, 110c and 110d, the battery 111 and the first cooling jacket 300, and the first cooling jacket 300 and the power conversion module 112 can respectively contact each other through heat transfer media 114a, 114b and 114c. Other multiple battery modules 110e to 110i can also be configured in the same manner.

[0047] The heat transfer media 114a, 114b, 114c and 114d may include thermal paste or thermal pads.

[0048] Simultaneously, the flow rates of the cooling medium flowing through the channels disposed inside the second cooling jacket 200 and the cooling medium flowing through the channels disposed inside the first cooling jacket 300 can be controlled independently. For this purpose, valves or water pumps can be respectively installed at the inlet 200a of the second cooling jacket 200 and the inlet 300a of the first cooling jacket 300 to independently control the flow rates of the cooling medium. This is merely an example of this disclosure, and various embodiments can obviously be implemented according to the needs of those skilled in the art. With this configuration, differentiated control of the cooling performance of the power conversion module and the battery can be achieved.

[0049] Meanwhile, the power conversion module 112 is a device for converting the power of the battery 111, and may include at least one of a DC / DC converter and a DC / AC inverter.

[0050] Figure 5 This is a circuit diagram of a battery module according to an exemplary embodiment of the present disclosure. Figure 5 The circuits shown are intended to aid in understanding this disclosure, and it should be noted that this disclosure is not limited to... Figure 5 .

[0051] like Figure 5As shown, the battery module 110 may include a battery 111, an inverter 410 connected to the battery 111, a first DC / DC converter 420, and a second DC / DC converter 430. According to an exemplary embodiment of this disclosure, the battery module 110 may further include a common capacitor 440. The inverter 410, the first DC / DC converter 420, and the second DC / DC converter 430 may correspond to the power conversion module of this disclosure.

[0052] Battery 111 can output battery voltage and charge or discharge electrical energy. The battery voltage constitutes the base voltage of battery module 110 and provides input voltage for inverter 410, first DC / DC converter 420 and second DC / DC converter 430.

[0053] Furthermore, the voltage of battery 111 can be lower than the voltage of high-voltage battery packs used in electric vehicle drive systems in related technologies. Therefore, the vehicle battery module 110 according to an exemplary embodiment of this disclosure can utilize power conversion elements configured for operation at low voltages, thereby reducing manufacturing costs.

[0054] In the battery module 110 according to an exemplary embodiment of the present disclosure, various sizes and types of voltages can be output depending on the series / parallel combination of the battery modules 110. Therefore, a single standard battery module 110 can be applied to various vehicle models, thereby reducing manufacturing costs.

[0055] For example, with the battery voltage set to 100V, a battery module system with an output of 400V can be formed by connecting four battery modules 110 in series, and a battery module system with an output of 800V can be formed by connecting eight battery modules 110 in series. Furthermore, if the battery voltage is set to 50V, a battery module system with an output of 400V can be formed by connecting eight battery modules 110 in series, and a battery module system with an output of 800V can be formed by connecting sixteen battery modules 110 in series.

[0056] Furthermore, a single-phase battery module system can be formed by connecting the battery modules 110 in series and using the inverter output to output a high-voltage AC voltage. Alternatively, multiple single-phase battery module systems can be used to output a three-phase AC voltage. Additionally, a battery module system configured to carry high current can be formed by connecting the battery modules 110 in parallel.

[0057] Inverter 410 converts battery voltage to AC module voltage and outputs that voltage. Furthermore, inverter 410 may include input terminals 411 and 412 and output terminals 413 and 414. Inverter input terminals 411 and 412 are connected in parallel to battery 111 to receive battery voltage, and inverter output terminals 413 and 414 can output AC module voltage. In this specification, inverter output terminals 413 and 414 may also be referred to as AC module output terminals for outputting AC module voltage.

[0058] Furthermore, the first DC / DC converter 420 can convert the battery voltage to a first DC module voltage lower than the battery voltage and output that voltage. The first DC module voltage can be set as the drive voltage for a low-voltage load. For example, the low-voltage load could be an electrical load such as various lights, radios, and infotainment systems in an electric vehicle. The first DC module voltage can be set as the low-voltage load operating voltage, such as 12V, 24V, or 48V. However, the voltage levels mentioned herein are merely examples and can be set to various voltage levels depending on the design.

[0059] The first DC / DC converter 420 may include input terminals 421 and 422 and output terminals 423 and 424. The input terminals 421 and 422 of the first DC / DC converter 420 may be connected in parallel to the battery 111 to receive battery voltage, and the output terminals 423 and 424 of the first DC / DC converter 420 may output a first DC module voltage. In this specification, the output terminals 423 and 424 of the first DC / DC converter 420 may also be referred to as first DC module output terminals that output the first DC module voltage.

[0060] In addition, the output terminals 423 and 424 of the first DC / DC converter 420 can be directly connected to a low-voltage load to provide the first DC module voltage.

[0061] In an exemplary embodiment of this disclosure, one end 424 of the output terminal of the first DC / DC converter 420 may be grounded, and the other end 423 may be connected to a low-voltage load to output a first DC module voltage. In another exemplary embodiment of this disclosure, both ends of the output terminal of the first DC / DC converter 420 may be connected to the two ends of a low-voltage load to output a first DC module voltage.

[0062] The second DC / DC converter 430 can convert the battery voltage into a second DC module voltage and output that voltage. The second DC module voltage can be set to a value greater than the first DC module voltage output by the first DC / DC converter 420. The second DC module voltage can be less than or equal to the battery voltage, or it can be greater than the battery voltage.

[0063] Furthermore, the second DC module voltage output from the second DC / DC converter 430 can be connected in series with the second DC module voltage output from another battery module 110 to provide power to a high-voltage load. Specifically, the second DC module voltage output from the second DC / DC converter 430 does not provide power to the high-voltage load through a single output, but is connected in series with the second DC module voltage of another battery module 110 to provide power to the high-voltage load. Since the battery voltage included in the battery module 110 is configured to a low voltage, multiple battery modules 110 can be combined in series to provide high voltage, thereby providing voltage to high-voltage loads such as air conditioning systems. Specifically, the output terminals of the second DC / DC converter 430 are connected in series with the output terminals of the second DC / DC converter 430 of another battery module to form a high voltage, thereby providing power to the high-voltage load.

[0064] Additionally, the second DC / DC converter 430 may include input terminals 431 and 432 and output terminals 433 and 434. The input terminals 431 and 432 of the second DC / DC converter 430 may be connected in parallel with the battery 111 to receive the battery voltage, and the output terminals 433 and 434 of the second DC / DC converter 430 may output a second DC module voltage. In this specification, the output terminals 433 and 434 of the second DC / DC converter 430 may also be referred to as second DC module output terminals that output the second DC module voltage.

[0065] The output terminals 433 and 434 of the second DC / DC converter 430 can be connected in series with the output terminals of another second DC / DC converter 430 included in another battery module, or they can be connected to a high-voltage load.

[0066] Battery 111 can be configured to be connected in parallel with input terminals 411 and 412 of inverter 410, input terminals 421 and 422 of first DC / DC converter 420, and input terminals 431 and 432 of second DC / DC converter 430.

[0067] The common capacitor 440 can be connected in parallel with the battery 111 and can be configured to be connected in parallel with the input terminals 411 and 412 of the inverter, the input terminals 421 and 422 of the first DC / DC converter, and the input terminals 431 and 432 of the second DC / DC converter 430.

[0068] According to the exemplary embodiment of the present disclosure, the battery module 110 can share a single common capacitor, instead of using separate capacitors for each inverter and converter element, thereby reducing size. Furthermore, the use of low-voltage capacitors can reduce production costs.

[0069] As described above, according to the exemplary embodiments of this disclosure, by forming a flow channel inside the first cooling jacket such that the area of ​​the flow channel adjacent to the power conversion module is smaller than the area of ​​the flow channel adjacent to the battery, the thermal resistance between the first cooling jacket and the battery is configured to be smaller than the thermal resistance between the first cooling jacket and the power conversion module. Alternatively, by independently controlling the flow rate of the cooling medium flowing through the flow channel disposed inside the second cooling jacket and the flow rate of the cooling medium flowing through the flow channel disposed inside the first cooling jacket, the cooling performance of the power conversion module and the battery can be differentially controlled.

[0070] According to an exemplary embodiment of this disclosure, a first cooling jacket is additionally provided in a battery module including a battery, a power conversion module and a busbar, and the busbar is integrally provided with the first cooling jacket by contacting it, thereby improving the cooling performance of the busbar, thereby reducing the cross-sectional area of ​​the busbar and reducing the cost and weight of the busbar.

[0071] Furthermore, according to exemplary embodiments of this disclosure, by assembling power conversion modules such as inverters and converters inside the battery pack and providing cooling jackets inside the battery pack for cooling them, the cooling structure can be simplified, and the focus can be on cooling the battery during charging, thereby reducing costs while ensuring charging speed and stability.

[0072] As described above, according to the exemplary embodiments of this disclosure, a flow channel is provided inside the first cooling jacket, such that the area of ​​the flow channel adjacent to the power conversion module is smaller than the area of ​​the flow channel adjacent to the battery, or the thermal resistance between the first cooling jacket and the battery is configured to be smaller than the thermal resistance between the first cooling jacket and the power conversion module, or the flow rate of the cooling medium flowing through the flow channel provided inside the second cooling jacket and the flow rate of the cooling medium flowing through the flow channel provided inside the first cooling jacket are independently adjusted, thereby enabling differentiated control of the cooling performance of the power conversion module and the battery.

[0073] In an exemplary embodiment of this disclosure, a first cooling jacket is additionally provided in the battery module, which includes a battery, a power conversion module, and a busbar, and the busbar is integrally provided with the first cooling jacket through contact, thereby improving the cooling performance of the busbar, thereby reducing the cross-sectional area of ​​the busbar, and reducing the cost and weight of the busbar.

[0074] Furthermore, in exemplary embodiments of this disclosure, by assembling power conversion modules such as inverters and converters inside the battery pack and providing cooling jackets inside the battery pack for cooling them, the cooling structure can be simplified, and the focus can be on cooling the battery during charging, thereby reducing costs while ensuring charging speed and stability.

[0075] While exemplary embodiments have been shown and described above, it will be apparent to those skilled in the art that modifications and variations may be made without departing from the scope of this disclosure as defined by the appended claims.

Claims

1. A vehicle battery pack, the battery pack comprising: Multiple battery modules; as well as The first cooling jacket has internal channels for the flow of cooling medium. Each of the plurality of battery modules includes, Battery; as well as A power conversion module that converts the power from the battery, and The power conversion module is in contact with the first surface of the first cooling sleeve, and the battery is in contact with the second surface of the first cooling sleeve.

2. The battery pack according to claim 1, wherein the flow channel provides differentiated cooling for the power conversion module and the battery.

3. The battery pack according to claim 1, wherein the area of ​​the flow channel adjacent to the power conversion module is smaller than the area of ​​the flow channel adjacent to the battery.

4. The battery pack according to claim 1, wherein the flow channel comprises a plurality of first flow channels having a trapezoidal cross-section.

5. The battery pack according to claim 1, The flow channel includes a single second flow channel with a quadrilateral cross-section. The distance between the second flow channel and the battery is shorter than the distance between the second flow channel and the power conversion module.

6. The battery pack of claim 1, wherein the flow channel includes a single third flow channel having a trapezoidal cross-section.

7. The battery pack according to claim 1, wherein the thermal resistance of the heat transfer medium disposed between the first cooling jacket and the battery is lower than the thermal resistance of the heat transfer medium disposed between the first cooling jacket and the power conversion module.

8. The battery pack according to claim 7, wherein the heat transfer medium comprises thermal paste or a thermal pad.

9. The battery pack according to claim 1, further comprising a second cooling jacket that contacts the lower surface of the plurality of battery modules and has a flow channel for the flow of cooling medium inside.

10. The battery pack of claim 9, wherein the battery is in contact with the first cooling jacket, the first cooling jacket is in contact with the power conversion module, and the second cooling jacket is in contact with the plurality of battery modules via a heat transfer medium.

11. The battery pack according to claim 9, wherein the flow rate of the cooling medium flowing through the flow channel disposed inside the second cooling jacket and the flow rate of the cooling medium flowing through the flow channel disposed inside the first cooling jacket are independently adjustable.

12. The battery pack of claim 1, wherein the power conversion module comprises at least one of a DC / DC converter and a DC / AC inverter.

13. A vehicle battery pack, the battery pack comprising: The system includes multiple battery modules, a first cooling jacket, and a second cooling jacket. The first cooling jacket and the second cooling jacket each have internal channels for the flow of cooling medium. Each of the plurality of battery modules includes, Battery; A power conversion module that converts power from the battery; and The first busbar connects the battery and the power conversion module. The first cooling jacket includes an opening through which the busbar passes. The busbar contacts the side surface of the opening and the upper surface of the first cooling sleeve. The power conversion module is in contact with the first surface of the first cooling jacket, and the battery is in contact with the second surface of the first cooling jacket. The plurality of battery modules are in contact with the upper surface of the second cooling sleeve, and The flow channels provide differentiated cooling for the power conversion module and the battery.

14. The battery pack of claim 13, further comprising: The second busbar is located on the side of the battery module and contacts the first cooling sleeve.

15. The battery pack of claim 13, wherein the second cooling jacket contacts the lower surface of the plurality of battery modules.

16. The battery pack of claim 13, wherein the battery and the first cooling jacket, the first cooling jacket and the power conversion module, and the second cooling jacket and the plurality of battery modules are in contact with each other through a heat transfer medium.

17. The battery pack of claim 16, wherein the thermal resistance of the heat transfer medium disposed between the first cooling jacket and the battery is lower than the thermal resistance of the heat transfer medium disposed between the first cooling jacket and the power conversion module.

18. The battery pack of claim 17, wherein the heat transfer medium comprises thermal paste or a thermal pad.

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