Battery pack for vehicle

Abstract

A battery pack of a vehicle includes a plurality of battery modules and a first cooling jacket having a flow path through which a cooling medium flows formed therein, each of the plurality of battery modules may include a battery, a power conversion module, and a bus bar, and a power conversion module that converts power of the battery, and a bus bar that connects the battery and the power conversion module, and that may be in close contact with the first cooling jacket and may be integrally formed with the first cooling jacket.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2023-0119192 filed on September 7, 2023, in the Korean Intellectual Property Office, and Korean Patent Application No. 10-2024-0109135 filed on August 14, 2024, in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present invention relates to a battery pack for a vehicle. Background Art

[0004] Generally, an environmentally friendly vehicle includes a battery pack having a plurality of batteries and a power conversion module (eg, an inverter or a converter), wherein the battery pack and the power conversion module are connected via a bus bar, which is generally formed of copper and is generally cooled by air cooling.

[0005] Recently, as the output power of environmentally friendly vehicles has increased, the cross-sectional area of ​​the busbar needs to be increased, and accordingly, the weight and cost of the busbar have also increased. In addition, as the output power of environmentally friendly vehicles has increased, the current flowing through the busbar is larger than before, and the traditional air cooling method cannot improve the cooling performance.

[0006] Meanwhile, the battery pack and the power conversion module occupy separate spaces, respectively, and accordingly, a cooling device for supplying coolant to each of the battery pack and the power conversion module is also separately installed, so that the component configuration for connecting the battery pack and the power conversion module is very complicated.

[0007] Furthermore, when driving an eco-friendly vehicle, both the battery and the power conversion module need to be cooled, but when charging, the power conversion module does not need to be cooled. Therefore, if the cooling capacity of the power conversion module can be converted to the cooling capacity of the battery when charging, it is possible to focus on cooling the battery, thereby increasing the charging speed and ensuring stability.

[0008] However, in the case of the existing cooling device structure, cooling devices are installed for the battery pack and the power conversion module respectively, and each cooling device works independently. Therefore, it is impossible to focus on cooling the battery, so that the charging speed cannot be increased and its stability cannot be ensured during charging. Summary of the invention

[0009] One aspect of the present invention is to provide a battery pack for a vehicle, which can improve the cooling performance of a bus bar, thereby reducing the cross-sectional area of ​​the bus bar to reduce the cost and weight of the bus bar.

[0010] One aspect of the present invention is directed to providing a battery pack for a vehicle to improve cooling performance of a battery and a power conversion module.

[0011] One aspect of the present invention is to provide a battery pack for a vehicle, which can simplify a cooling structure and focus on cooling the battery during charging, thereby ensuring charging speed and stability while reducing costs.

[0012] One aspect of the present invention is directed to providing a battery pack for a vehicle, which can differently control cooling performance of a power conversion module and a battery.

[0013] According to an embodiment of the present invention, a battery pack for a vehicle is provided, which includes a plurality of battery modules and a first cooling jacket, wherein a flow path through which a cooling medium flows is formed inside the first cooling jacket, each of the plurality of battery modules may include a battery, a power conversion module and a bus bar, wherein the power conversion module converts the power of the battery, the bus bar connects the battery and the power conversion module, and the bus bar may be in close contact with the first cooling jacket and be formed integrally with the first cooling jacket.

[0014] According to an embodiment of the present invention, the first cooling jacket may be provided with an opening through which the bus bar passes, and the bus bar may be in close contact with at least one of a side surface of the opening and an upper surface of the first cooling jacket.

[0015] According to an embodiment of the present invention, the bus bar may be in close contact with a side surface of the opening, may extend along the side surface of the opening, and may then be bent to be in close contact with an upper surface of the first cooling jacket.

[0016] According to an embodiment of the present invention, the busbar may include a conductor, an insulating medium for insulating the conductor, and at least one of the insulating medium and the side surface of the opening and the insulating medium and the side surface of the first cooling jacket may be in close contact with each other through a heat transfer medium.

[0017] According to an embodiment of the present invention, the power conversion module may be in close contact with one surface of the first cooling jacket, and the battery may be in close contact with the other surface of the first cooling jacket.

[0018] According to an embodiment of the present invention, the battery pack for a vehicle further includes a second cooling jacket that is in close contact with lower surfaces of the plurality of battery modules and has a flow path formed therein through which a cooling medium flows.

[0019] According to an embodiment of the present invention, 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 close contact with each other through a heat transfer medium.

[0020] According to an embodiment of the present invention, the flow rate of the cooling medium flowing through the flow path formed in the second cooling jacket and the flow rate of the cooling medium flowing through the flow path formed in the first cooling jacket can be independently controlled.

[0021] According to an embodiment of the present invention, the power conversion module may include at least one of a DC / DC converter and a DC / AC inverter.

[0022] According to an embodiment of the present invention, a battery pack for a vehicle is provided, which includes a plurality of battery modules, a first cooling jacket and a second cooling jacket, wherein a flow path through which a cooling medium flows is formed inside the first cooling jacket, and a flow path through which a cooling medium flows is formed inside the second cooling jacket, wherein each of the plurality of battery modules includes a battery, a power conversion module and a bus bar, the power conversion module converts the power of the battery, the bus bar connects the battery and the power conversion module, the first cooling jacket may be provided with an opening through which the bus bar passes, the bus bar is in close contact with the side surface of the opening and the upper surface of the first cooling jacket, the power conversion module may be in close contact with one surface of the first cooling jacket, and the battery may be in close contact with another surface of the first cooling jacket, and the plurality of battery modules may be in close contact with the upper surface of the second cooling jacket.

[0023] According to an embodiment of the present invention, a first cooling jacket is additionally configured in a battery module (the battery module includes a battery, a power conversion module and a bus bar), and the bus bar can be formed integrally by being in close contact with the first cooling jacket to improve the cooling performance of the bus bar, thereby reducing the cross-sectional area of ​​the bus bar, thereby reducing the cost and weight of the bus bar.

[0024] Furthermore, according to an embodiment of the present invention, a first cooling jacket may be added to the battery pack, and the power conversion module and the battery may be in close contact with one side and the other side of the first cooling jacket, respectively, thereby improving the cooling performance of the battery and the power conversion module.

[0025] In addition, according to an embodiment of the present invention, power conversion modules such as inverters or converters can be aggregated into a battery pack, and a cooling jacket for cooling the power conversion modules can be provided in the battery pack, so that the cooling structure can be simplified and the cooling of the battery can be focused during charging, thereby ensuring the charging speed and stability and reducing costs.

[0026] In addition, according to an embodiment of the present invention, the thermal resistance between the first cooling jacket and the battery can be 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 path formed in the second cooling jacket and the flow rate of the cooling medium flowing through the flow path formed in the first cooling jacket can be independently controlled, thereby enabling the cooling performance of the power conversion module and the battery to be controlled differently. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other aspects, features and advantages of the present invention will be more clearly understood from the following detailed description presented in conjunction with the accompanying drawings, in which:

[0028] Figure 1 is a perspective view of a battery pack for a vehicle according to an embodiment of the present invention.

[0029] Figure 2A yes Figure 1 A top view of the battery pack shown in FIG.

[0030] Figure 2B yes Figure 1 A side cross-sectional view of a battery pack shown in FIG.

[0031] Figure 3A and Figure 3B is a schematic diagram showing a flow path within a first cooling jacket according to an embodiment of the present invention.

[0032] Figure 4 is a schematic diagram showing a bus bar that is in close contact with a first cooling jacket and formed integrally therewith according to an embodiment of the present invention;

[0033] Figure 5 is a schematic diagram exemplarily showing a circuit of a battery module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The specific embodiments of the present invention will be described below with reference to the accompanying drawings. The following detailed description is provided to help fully understand the methods, devices and / or systems described herein. However, this is only an example and the present invention is not limited thereto.

[0035] When describing in detail an exemplary embodiment of the present invention, when it is determined that the detailed description of the prior art related to the present invention may unnecessarily obscure the main points of the present invention, its detailed description will be omitted. In addition, the terms described below are defined in view of the functions in the present invention and may vary according to the intention or practice of the user or operator. Therefore, the terms should be defined based on the content throughout the specification. The terms used in the specification are only intended to describe the embodiments and are by no means restrictive. Unless otherwise explicitly used, the expression in the singular includes the meaning of the plural form. In this specification, expressions such as "including" or "comprising" are intended to specify features, values, steps, operations, elements, parts or combinations thereof, and should not be interpreted as excluding any existence or possibility of one or more other features, values, steps, operations, elements, parts or combinations thereof.

[0036] Figure 1 is a perspective view of a battery pack for a vehicle according to an embodiment of the present invention. Figure 2A yes Figure 1 A top view of a battery pack is shown in FIG. Figure 2B yes Figure 1 A side cross-sectional view of a battery pack is shown in FIG.

[0037] like Figures 1 to 2B As shown, the battery pack 100 of the vehicle according to the embodiment of the present invention 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. Figure 1 Twelve battery modules are shown, but this is to help understand the present invention, and there may be at least two or more battery modules.

[0038] The plurality of 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. In addition, the three single-phase battery module systems 110-1, 110-2, and 110-3 may include output terminals of the inverter connected in series through a bus bar 115 (see the following description). Figure 5 The three-phase (A phase, B phase, and C phase) AC system output terminals are configured as shown in the figure numerals 413 and 414. The three-phase (A phase, B phase, and C phase) AC system output terminals can output different AC voltages with the same amplitude and the same phase difference.

[0039] For example, the three-phase (A phase, B phase, and C phase) AC system output terminal can output different AC voltages with a phase difference of 120 degrees from each other. Therefore, the three-phase (A phase, B phase, and C phase) AC system output terminal can output a three-phase AC voltage, and can provide a driving voltage to a motor that uses the three-phase AC voltage as a driving voltage.

[0040] The bus bar 115 may be disposed on the side surface of the battery module, and the bus bar 115 may contact the first cooling jacket 300. However, the present invention is not limited thereto, and the bus bar 115 may be installed spaced apart from the first cooling jacket 300 so as not to contact the first cooling jacket 300, thereby enabling cooling in an air cooling manner.

[0041] The plurality of battery modules 110a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, 110i, 110j, 110k, and 110l each have the same structure, and thus hereinafter, the structure of one battery module 110a will be mainly described.

[0042] The battery module 110 a may include a battery 111 , a power conversion module 112 that converts power of the battery 111 , and a bus bar 113 .

[0043] The second cooling jacket 200 may be in close contact with lower surfaces of the battery modules 110a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, 110i, 110j, 110k, and 110l, and a flow path through which a cooling medium flows may be formed therein.

[0044] The cooling medium may be introduced through the inlet 200a, may circulate over the entire surface of the second cooling jacket 200 along a flow path formed in the second cooling jacket 200, and may then be discharged through the outlet 200b. Here, the cooling medium may be a coolant, but other cooling media other than the coolant may also be applied.

[0045] Meanwhile, the battery 111 may be in close contact with one surface of the first cooling jacket 300, the power conversion module 112 may be in close contact with another surface of the first cooling jacket 300, and a flow path through which a cooling medium flows may be formed in the first cooling jacket 300. Although the drawings show that the battery 111 is in close contact with the lower surface of the first cooling jacket 300 and the power conversion module 112 is in close contact with the upper surface of the first cooling jacket 300, according to the embodiment, the battery 111 may be in close contact with the upper surface of the first cooling jacket 300, and the power conversion module 112 may be in close contact with the lower surface of the first cooling jacket 300. The cooling medium may be introduced through the inlet 300a, may circulate on the entire surface of the first cooling jacket 300 along the flow path formed in the first cooling jacket 300, and may then be discharged through the outlet 300b.

[0046] According to an embodiment of the present invention, the thermal resistance between the first cooling jacket 300 and the battery 111 may be smaller than the thermal resistance between the first cooling jacket 300 and the power conversion module 112. To this end, the distance between the flow path formed in the first cooling jacket and the battery may be configured to be shorter than the distance between the flow path formed in the first cooling jacket and the power conversion module, or, among the flow paths formed in the first cooling jacket, the area of ​​the flow path adjacent to the power conversion module may be configured to be smaller than the area of ​​the flow path adjacent to the battery (see below). Figure 3A and Figure 3B ).

[0047] Figure 3A and Figure 3B is a schematic diagram showing a flow path in a first cooling jacket according to an embodiment of the present invention.

[0048] Specifically, Figure 3A As shown, a distance L1 between the flow path 300 c formed in the first cooling jacket 300 and the battery 111 may be shorter than a distance L2 between the flow path 300 c formed in the first cooling jacket 300 and the power conversion module 112 .

[0049] In addition, if Figure 3B As shown, among the flow paths 300 c formed in the first cooling jacket 300 , an area A1 of the flow path adjacent to the power conversion module 112 may be smaller than an area A2 of the flow path adjacent to the battery 111 .

[0050] Furthermore, the heat transfer medium 114 b disposed between the first cooling jacket 300 and the battery 111 may have a smaller thermal resistance than the heat transfer medium 114 c disposed between the first cooling jacket 300 and the power conversion module 112 .

[0051] With this configuration, the cooling performance of the power conversion module and the battery can be controlled differently.

[0052] Meanwhile, the first cooling jacket 300 may be provided with an opening 300d through which the bus bar 113 passes, and the bus bar 113 may be connected to the battery 111 and the power conversion module 112 through the opening 300d. The bus bar 113 may be integrally formed with the first cooling jacket 300.

[0053] Figure 4 is a schematic diagram illustrating a bus bar that is in close contact with a first cooling jacket and is formed integrally therewith according to an embodiment of the present invention.

[0054] like Figure 4 As shown, the bus bar 113 may include a conductor 113a such as copper and an insulating medium 113b (e.g., an insulating coating or insulating paper) for insulating the conductor 113a, and one side of the bus bar 113 may be threadedly fastened to the battery 111 via a groove 113d, and the other side of the bus bar 113 may be threadedly fastened to the power conversion module 112 via a groove 113c.

[0055] According to an embodiment of the present invention, the bus bar 113 may be in close contact with the first cooling jacket 300 and may be integrally formed therewith.

[0056] like Figure 3A and 3B As shown, the bus bar 113 may be in close contact with the side surface of the opening 300d, and may extend along the side surface of the opening 300d, and then may be bent, so as to be in close contact with the upper surface of the first cooling jacket 300. In addition, the bus bar 113 and the side surface of the opening 300d may be in close contact with each other through the heat transfer medium 114d, and the bus bar 113 and the side surface of the first cooling jacket 300 may be in close contact with each other through the heat transfer medium 114d. The bus bar 113 may also be in close contact with the side surface of the power conversion module 112 through the heat transfer medium 114d.

[0057] Reference again Figures 1 to 3B The second cooling jacket 200 and multiple battery modules 110a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, 110i, 110j, 110k and 110l, the battery 111 and the first cooling jacket 300, and the first cooling jacket 300 and the power conversion module 112 can be in close contact with each other through the heat transfer medium 114a, 114b and 114c, respectively.

[0058] The heat transfer media 114 a , 114 b , 114 c , and 114 d may be formed of thermal grease or a heat transfer pad.

[0059] At the same time, the flow rate of the cooling medium flowing through the flow path formed in the second cooling jacket 200 and the flow rate of the cooling medium flowing through the flow path formed in the first cooling jacket 300 can be independently controlled. To this end, a valve or a water pump (not shown separately) can be installed in the inlet 200a of the second cooling jacket 200 and the inlet 300a of the first cooling jacket 300, respectively, so that the flow rate of the cooling medium can be independently controlled. This is only an example of the present invention, and it is obvious that various modifications can be made according to the needs of those skilled in the art. Through the components, the cooling performance of the power conversion module and the battery can be controlled differently.

[0060] Meanwhile, the power conversion module 112 may be a device for converting power of the battery 111 , and may include at least one of a DC / DC converter and a DC / AC inverter.

[0061] Figure 5 is a schematic diagram exemplarily showing a circuit of a battery module according to an embodiment of the present invention. Figure 5 The circuit shown in the figure is intended to help understand the present invention, and it should be noted that the present invention is not limited to Figure 5 .

[0062] like Figure 5 As shown, the battery module 110 may include a battery 111, an inverter 410 (which is connected to the battery 111), a first DC / DC converter 420, and a second DC / DC converter 430. Accordingly, according to an embodiment of the present invention, 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 a power conversion module of the present invention.

[0063] The battery 111 can output a battery voltage and charge or discharge electric energy. In addition, the battery voltage can form a basic voltage of the battery module 110, and can provide an input voltage of the inverter 410, an input voltage of the first DC / DC converter 420, and an input voltage of the second DC / DC converter 430.

[0064] In addition, the battery 111 may have a battery voltage lower than a high voltage battery pack applied to a conventional electric vehicle driving system. Therefore, the vehicle battery module 110 according to the embodiment of the present invention may apply a power conversion element capable of operating at a low voltage, thereby reducing manufacturing costs.

[0065] Based on the battery module 110 according to the embodiment of the present invention, various amplitudes and types of voltages can be output according to the series / parallel combination of the battery module 110, so that using a single standard battery module 110, the battery module 110 can be applied to various vehicle models with different specifications, thereby reducing manufacturing costs.

[0066] For example, when the battery voltage is set to 100 V, a battery module system that outputs a voltage of 400 V can be formed by connecting four battery modules 110 in series, and a battery module system that outputs a voltage of 800 V can be formed by connecting eight battery modules 110 in series. In addition, for example, when the battery voltage is set to 50 V, a battery module system that outputs a voltage of 400 V can be formed by connecting eight battery modules 110 in series, and a battery module system that outputs a voltage of 800 V can be formed by connecting sixteen battery modules 110 in series.

[0067] In addition, the battery modules 110 can be connected in series with each other and use the output of the inverter to form a single-phase battery module system that outputs a high-voltage AC voltage, and multiple single-phase battery module systems can be used to output a three-phase AC voltage. In addition, the battery modules 110 can be combined in parallel to form a battery module system through which a large current flows.

[0068] The inverter 410 may convert the battery voltage into an AC module voltage and may output the AC module voltage. In addition, the inverter 410 may include input terminals 411 and 412 and output terminals 413 and 414, and the input terminals 411 and 412 of the inverter may be connected in parallel to the battery 111 to receive the battery voltage, and the output terminals 413 and 414 of the inverter may output the AC module voltage. In addition, in this specification, the output terminals 413 and 414 of the inverter may be referred to as AC module output terminals that output the AC module voltage.

[0069] In addition, the first DC / DC converter 420 can convert the battery voltage into a first DC module voltage lower than the battery voltage, and can output the first DC module voltage. In addition, the first DC module voltage can be set to a driving voltage of a low-voltage load. For example, the low-voltage load can be various lights of an electric vehicle and electrical loads such as radio, infotainment system, etc. In addition, the first DC module voltage can be set to 12V, 24V or 48V, which is a driving voltage of a low-voltage load. However, the voltage amplitudes mentioned in this specification are only implementation schemes, and can be set to various voltage amplitudes according to the design.

[0070] In addition, the first DC / DC converter 420 may include input terminals 421 and 422 and output terminals 423 and 424, and the input terminals 421 and 422 of the first DC / DC converter 420 may be connected in parallel to the battery 111 to receive the battery voltage, and the output terminals 423 and 424 of the first DC / DC converter 420 may output the first DC module voltage. In addition, in this specification, the output terminals 423 and 424 of the first DC / DC converter 420 may be referred to as first DC module output terminals that output the first DC module voltage.

[0071] In addition, the output terminals 423 and 424 of the first DC / DC converter 420 may be directly connected to a low voltage load to provide a first DC block voltage.

[0072] In an embodiment, one end 424 of the output terminal of the first DC / DC converter 420 can be grounded, and the other end 423 of the output terminal can be connected to a low voltage load to output the first DC module voltage. In another embodiment, both ends of the output terminal of the first DC / DC converter 420 can be connected to both ends of the low voltage load to output the first DC module voltage.

[0073] In addition, the second DC / DC converter 430 may convert the battery voltage into a second DC module voltage, and may output the second DC module voltage. The second DC module voltage may be set to a value greater than the first DC module voltage output from the first DC / DC converter 420. In addition, the second DC module voltage may be less than or equal to the battery voltage, and may be greater than the battery voltage.

[0074] In addition, the second DC module voltage output from the second DC / DC converter 430 may be connected in series with the second DC module voltage output from another battery module 110, thereby providing power to a high voltage load. In other words, the second DC module voltage output from the second DC / DC converter 430 may not provide power to a high voltage load as a single output power, but may be connected in series with the second DC module voltage of another battery module 110 to provide power to a high voltage load. Since the battery voltage included in the battery module 110 is formed as a low voltage, a plurality of battery modules 110 may be connected in series with each other to provide a high voltage, thereby providing voltage to a high voltage load such as an air conditioning system. In other words, the output terminal of the second DC / DC converter 430 may be connected in series with the output terminal of the second DC / DC converter 430 of another battery module to form a high voltage, thereby providing power to a high voltage load.

[0075] In addition, 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 the second DC module voltage. In addition, 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.

[0076] In addition, output terminals 433 and 434 of the second DC / DC converter 430 may be connected in series with output terminals of the second DC / DC converter 430 included in another battery module, or may be connected to a high voltage load.

[0077] The battery 111 may be configured to be connected in parallel with input terminals 411 and 412 of the inverter 410 , input terminals 421 and 422 of the first DC / DC converter 420 , and input terminals 431 and 432 of the second DC / DC converter 430 .

[0078] In addition, 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.

[0079] Based on the battery module 110 according to the embodiment of the present invention, since a common capacitor can be shared without applying separate capacitors to each inverter and each converter element, the volume can be reduced, and since low-voltage capacitors can be applied, there is an advantage of reducing manufacturing costs.

[0080] As described above, according to an embodiment of the present invention, a first cooling jacket can be additionally formed in a battery module (the battery module includes a battery, a power conversion module, and a bus bar), and the bus bar can be in close contact with the first cooling jacket and formed integrally therewith, thereby improving the cooling performance of the bus bar, thereby reducing the cross-sectional area of ​​the bus bar and reducing the cost and weight of the bus bar.

[0081] Furthermore, according to an embodiment of the present invention, a first cooling jacket may be added to the battery pack, and the power conversion module and the battery may be in close contact with one surface and the other surface of the first cooling jacket, respectively, thereby improving the cooling performance of the battery and the power conversion module.

[0082] In addition, according to an embodiment of the present invention, power conversion modules such as inverters or converters can be aggregated into a battery pack, and a cooling jacket for cooling the power conversion modules can be provided in the battery pack, so that the cooling structure can be simplified and the cooling of the battery can be focused during charging, thereby ensuring the charging speed and stability and reducing costs.

[0083] In addition, according to an embodiment of the present invention, the thermal resistance between the first cooling jacket and the battery can be 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 path formed in the second cooling jacket and the flow rate of the cooling medium flowing through the flow path formed in the first cooling jacket can be independently controlled, thereby enabling the cooling performance of the power conversion module and the battery to be controlled differently.

[0084] Although the exemplary embodiments of the present invention have been described in detail above, it will be appreciated by those skilled in the art that the above embodiments may be modified in various ways without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the exemplary embodiments described, but should be determined by the appended claims and the equivalents thereof.

Claims

1. A battery pack for a vehicle, comprising: Multiple battery modules; as well as a first cooling jacket having a flow path formed within the first cooling jacket, wherein a cooling medium flows through the flow path; Wherein, each of the plurality of battery modules comprises: Battery; a power conversion module that converts power from the battery; and bus bars that connect the battery and the power conversion module; The bus bar contacts the first cooling jacket and is formed integrally with the first cooling jacket.

2. The battery pack for a vehicle according to claim 1, wherein: The first cooling jacket includes an opening through which the bus bar passes; The bus bar contacts at least one of a side surface of the opening and an upper surface of the first cooling jacket.

3. The battery pack for a vehicle according to claim 2, wherein: The bus bar contacts a side surface of the opening, extends along the side surface of the opening, and then bends to contact an upper surface of the first cooling jacket.

4. The battery pack for a vehicle according to claim 3, wherein: The bus bar comprises: Conductors; and Insulating media, which are used to insulate conductors; Wherein, at least one of the insulating medium and the side surface of the opening and the insulating medium and the side surface of the first cooling jacket are in contact with each other through a heat transfer medium.

5. The battery pack for a vehicle according to claim 1, wherein: The power conversion module contacts one surface of the first cooling jacket, and the battery contacts the other surface of the first cooling jacket.

6. The battery pack for a vehicle according to claim 1, further comprising: The second cooling jacket contacts the lower surfaces of the plurality of battery modules and has a flow path formed therein through which a cooling medium flows.

7. The battery pack for a vehicle according to claim 6, 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.

8. The battery pack for a vehicle according to claim 6, wherein: The flow rate of the cooling medium flowing through the flow path formed in the second cooling jacket and the flow rate of the cooling medium flowing through the flow path formed in the first cooling jacket can be independently controlled.

9. The battery pack for a vehicle according to claim 1, wherein: The power conversion module includes at least one of a DC / DC converter or a DC / AC inverter.

10. A battery pack for a vehicle, comprising: Multiple battery modules; a first cooling jacket having a first flow path formed in the first cooling jacket, wherein a cooling medium flows through the first flow path; a second cooling jacket having a second flow path formed in the second cooling jacket, wherein a cooling medium flows through the second flow path; Wherein, each of the plurality of battery modules comprises: Battery; a power conversion module that converts power from the battery; and bus bars that connect the battery and the power conversion module; The first cooling jacket is provided with an opening through which the bus bar passes; The bus bar is in contact with the side surface of the opening and the upper surface of the first cooling jacket; The power conversion module is in contact with one surface of the first cooling jacket, and the battery is in contact with the other surface of the first cooling jacket. The plurality of battery modules are in contact with an upper surface of the second cooling jacket, respectively.

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