Integrated battery pack and electric vehicle

Abstract

An integrated battery pack comprising a housing (1), a battery module (2), and a plurality of support elements (3), the housing (1) having a receiving cavity therein, the battery module (2) being installed in the receiving cavity, the battery module (2) having a pressure relief valve (26) at the tip, the plurality of support elements (3) being arranged at a distance from one another at the tip of the battery module (2) and being clamped between the battery module (2) and the housing (1), at least a portion of the support elements (3) covering the pressure relief valve (26), a pressure relief channel (323) being enclosed between the support elements (3) located on the pressure relief valve (26) and the battery module (2).

Description

TECHNICAL FIELDThe present application relates to the technical field of battery manufacture, for example, an integrated battery pack and an electric vehicle.PRIOR ARTWith the rapid development and technology iteration of new energy vehicles, the industry has placed higher demands on the lightweight construction of the entire vehicle, safety and manufacturing costs. To this end, Cell To Chassis (CTC) / Cell To Vehicle (CTV) technologies have evolved to meet the market demand for reducing the diversity of parts and reducing the manufacturing cost of the entire vehicle by the integrated construction of the entire vehicle.The CTV electric vehicle in the related technology integrates the chassis of the entire vehicle with the case of the battery pack, thereby significantly simplifying the structure of the entire vehicle. However, since the seats in the passenger compartment and the weight of the occupants directly act on the battery pack, the battery module inside the battery pack is exposed to the pressure of the passenger compartment, which results in deformations, damage, etc., thereby interfering with the safe operation of the battery pack. At the same time, when the battery module passes through thermally, the high-temperature substance emerging from the pressure relief valve propagates to the floor of the passenger compartment and thermally acts directly on the passenger compartment.DISCLOSURE OF UTILITY MODELAn integrated battery pack provided by the present application includes a housing, a battery module, and a plurality of support members, wherein the housing has a receiving cavity inside, and wherein the battery module is installed in the receiving cavity, and wherein the battery module has a pressure relief valve at the tip, and wherein the plurality of support members are spaced apart from each other at the tip of the battery module and clamped between the battery module and the housing, and wherein at least a part of the support members cover the pressure relief valve, and wherein a pressure relief channel is sealed between the support members located at the pressure relief valve and the battery module.The present application further provides an electric vehicle including a vehicle body, a seat, and an integrated battery pack, wherein the integrated battery pack is installed on the vehicle body, and wherein the seat is installed on the case of the integrated battery pack.The present application has the following advantages:with the arrangement of a plurality of support members between the battery module and the tip of the housing, the support members are used to perform a support function for the housing, and the gravity of the seat and the occupant can be transmitted uniformly to the entire battery module through the support members, thereby preventing the gravity of the seat and the occupant from concentrating on the joint between the seat and the housing or the footrest portion of the occupant; with the arrangement of the support members, the structural strength and rigidity of the entire integrated battery pack is improved and the occurrence of deformations and torsions of the entire vehicle is prevented; At the same time, by covering the pressure relief valve of the battery module by the support members, the high temperature substance is isolated by the support members when thermal runaway occurs in the battery module, which contributes to reducing the thermal effect on the tip of the housing and avoiding the high temperature substance from thermally affecting the passenger compartment.ILLUSTRATION OF UTILITY MODELFIG. 1 is a disassembled diagram of an integrated battery pack provided in some embodiments of the present application. FIG. 2 is a sectional view of an integrated battery pack provided in some embodiments of the present application after mounting the seat. FIG. 3 is a partial sectional view of an integrated battery pack provided in some embodiments of the present application after mounting the seat. FIG. 4 shows an enlarged view of the location A according to FIG. 3. FIG. 5 is a schematic diagram of a case cover provided in some embodiments of the present application after the seat is assembled. FIG. 6 is a schematic diagram of a battery module provided in some embodiments of the present application. FIG. 7 shows an enlarged view of the location B according to FIG. 6. FIG. 8 is a disassembled diagram of a battery module provided in some embodiments of the present application. FIG. 9 is a sectional view of a first support member provided in some embodiments of the present application. FIG. 10 is a sectional view of a second support member provided in some embodiments of the present application. FIG. 11 is a partial schematic view of a third support member provided in some embodiments of the present application. FIG. 12 is a schematic diagram of a temperature sensor provided in some embodiments of the present application.List of reference characters1 Housing 11 Housing bottom 111 Recess 112 First crimp structure 12 Housing cover 121 Lid body 122 Second crimp structure 1 23 Installation bracket 2 Battery module 21 Single battery 22 CCS component 23 Insulating plate 24 End plate 25 Buffer plate 26 Pressure relief valve 3 Support member 31 First support member 311 Main support block 312 Sub support block 313 First accommodation slit 314 First adhesive slit 32 Second support member 321 First support block 322 Second support block 323 Pressure relief passage 324 Second accommodation slit 325 Second adhesive slit 33 Third support member 331 Third support block 332 Fourth support block 333 Third accommodation slit 4 Lateral polystyrene layer 5 Lower polystyrene layer 6 Liquid cooling plate 7 Seat 8 BMS component 9 Structural adhesive 10 Temperature sensorCONCRETE EMBODIMENTSIn conjunction with the accompanying drawings and detailed embodiments, the technical solution of the present application will be described below.As illustrated in FIGS. 1 to 5, the present application provides an integrated battery pack including a housing 1, a battery module 2, and a support member 3. The housing 1 is a hollow structure, and the housing 1 has a receiving cavity. The battery module 2 is installed in the accommodation cavity, and the battery module 2 has a pressure relief valve 26 at the tip, so that when thermal runaway occurs in the battery module 2, the pressure relief valve 26 opens and releases high-temperature gases and other substances (e.g., electrolyte) inside the battery module 2. The support members 3 are a plurality of support members 3, the plurality of support members 3 being spaced apart from each other at the tip of the battery module 2, and the support members 3 are clamped between the battery module 2 and the housing 1. It is also understood that a first side of the support elements 3 abuts the battery module 2 and a second side abuts the upper cavity wall of the receiving cavity. At least a part of the support member 3 covers the pressure relief valve 26, i.e., the support member 3 is provided at a position corresponding to the pressure relief valve 26 of the battery module 2. Between the support member 3 on the pressure relief valve 26 and the battery module 2, a pressure relief passage 323 is included. When thermal runaway of the battery module 2 occurs, the high temperature gases and other substances are discharged into the pressure relief passage 323 through the pressure relief valve 26, so that the high temperature gases and other substances are evacuated via the pressure relief passage 323 and discharged to the outside of the housing 1.It is understood that the integrated battery pack is used in a CTV electric vehicle, i.e., the entire vehicle is integrally configured, and the tip of the housing 1 is used as the floor of the passenger compartment of the entire vehicle. Since a plurality of support members 3 are disposed between the battery module 2 and the tip of the housing 1 and a support function for the housing 1 is played by the support members 3, gravity of the seat 7 and the occupant can be uniformly transmitted to the entire battery module 2 due to the support members 3, thereby preventing gravity of the seat 7 and the occupant from concentrating on the joint between the seat 7 and the housing 1 or the footrest portion of the occupant. With the arrangement of the support members 3, the structural strength and rigidity of the entire integrated battery pack is improved, and the occurrence of deformations and torsions of the entire vehicle is prevented. At the same time, by covering the pressure relief valve 26 of the battery module 2 by the support members 3, the high-temperature substance is isolated by the support members 3 when thermal runaway occurs in the battery module 2, which contributes to reducing the thermal effect on the tip of the case 1 and preventing the high-temperature substance from thermally affecting the passenger compartment.The housing 1 comprises a housing base 11 and a housing cover 12, The housing base 11 and the housing cover 12 are stamped and shaped in one piece in order to improve the overall structural strength of the housing 1. A cutout 111 is formed on a side of the housing base 11 facing the housing cover 12, and a first flange structure 112 is formed on a circumferential section of the housing base 11. The first flange structure 112 is arranged around the recess 111, and the first flange structure 112 terminates flush with a slot opening of the recess 111. The case cover 12 includes a cover body 121 and an installation bracket 123. The lid body 121 has a structure similar to the structure of the case bottom 11, and a second bead structure 122 is formed on a peripheral portion of the lid body 121 to cooperate with the first bead structure 112. The lid body 121 is fixed together with the case bottom 11, and they are connected and fixed by fastening members (e.g., bolts, rivets, etc.). The fasteners are disposed on the first hemming structure 112 and the second hemming structure122 therethrough. Between the lid body 121 and the case bottom 11, a receiving cavity for installing the battery module 2 is formed. The installation bracket 123 is provided for installing the seat 7, the installation brackets 123 are provided in a number of more than 1, and may include at least two installation brackets 123 having different shapes and sizes to adapt to the structural dimensions of the seat 7 as well as the mounting position. The plurality of installation brackets 123 are disposed on a side surface of the lid body 121 facing away from the case bottom 11, namely, the installation brackets 123 are disposed at the tip of the case 1. In the present embodiment, the installation brackets 123 are integrally stamped and formed with the lid body 121. It is to be understood that the case cover 12 of the case 1 forms the bottom of the passenger compartment, and the gravity of both the seat 7 and the passenger acts on the case cover 12. The second side of the support member 3 is connected to the inner side wall of the case cover 12 to uniformly distribute the gravity of the seat 7 and the occupant through the support member 3 to the entire integrated battery pack to prevent a locally concentrated force from causing deformation, torsion, etc.The integrated battery pack further includes a liquid cooling plate 6. the liquid cooling plate 6 may adopt a liquid cooling plate in the related technology, and the liquid cooling plate 6 is capable of dissipating the heat of the battery module 2 by means of a coolant circulating and flowing inside. The liquid cooling plate 6 is provided at the bottom of the accommodation cavity, i.e., the liquid cooling plate 6 is installed at the bottom of the recess 111 of the housing bottom 11. The battery module 2 is mounted on the liquid cooling plate 6, and heat exchange can take place between the two. The space between the side wall of the battery module 2 and the cavity wall of the accommodation cavity is filled with a polystyrene to form a lateral polystyrene layer 4. And the space between the liquid cooling plate 6 and the cavity bottom of the receiving cavity is filled with the styropore to form a lower styropore layer 5. The side styropore layer 4 and the lower styropore layer 5 function as cushioning and energy absorption to prevent damage to the battery module 2 and the liquid cooling plate 6 by the impact of the electric vehicle from below during travel. At the same time, by filling the styropor, the gap between the battery module 2 and the case 1 and between the liquid cooling plate 6 and the case 1 can be eliminated, so that the entire integrated battery pack is formed as a whole, and the strength and rigidity of the entire integrated battery pack can be improved. In some exemplary embodiments, it is also possible to fill the styropor only between the battery module 2 and the housing 1 or only between the liquid cooling plate 6 and the housing 1.Optionally, as illustrated in FIG. 12, a plurality of temperature sensors 10 are arranged between the battery module 2 and the liquid cooling plate 6 with a distance from each other, the temperature sensors 10 being configured to detect the temperature of the battery module 2. The temperature sensors 10 are used to monitor the temperature changes of the battery module 2, which facilitates timely intervention when the temperature of the battery module 2 is abnormal, thereby ensuring safety of the integrated battery pack.Optionally, the integrated battery pack further includes a battery management system (BMS) component 8. the BMS component 8 is provided on the battery module 2 and electrically connected to the battery module 2. The temperature sensor 10 is electrically connected to the BMS component 8. The BMS component 8 may adopt components of related technologies, and is set to protect the battery module 2 from under voltage, temperature anomalies, and overcurrent in charging / discharging, etc.Referring to FIGS. 6 to 8, the battery module 2 includes a plurality of battery packs arranged one after another along a first direction (illustrated in the Y direction), each of the battery packs including a plurality of individual batteries 21 arranged one after another along a second direction (illustrated in the X direction). The first direction is perpendicular to the second direction, and in the present embodiment, the plurality of battery packs are arranged one after another along the width direction of the case 1, and the plurality of unit batteries 21 in each battery pack are arranged one after another along the length direction of the case 1. The single battery 21 is a square battery, and the thickness direction of the square cell is the illustrated X direction. The plurality of support members 3 are arranged in parallel and spaced apart, and the length direction of the support members 3 is parallel to the length direction of the housing 1, so that one of the support members 3 is capable of evenly distributing the gravity from the seat 7 and the occupant to the plurality of individual batteries 21. The space between two adjacent individual batteries 21 is filled with a structural adhesive 9. By filling the structural adhesive 9, gaps between adjacent individual batteries 21 can be eliminated so that all individual batteries 21 form a whole in order to improve the structural strength of the entire battery module 2 and at the same time to achieve that the entire battery module 2 is used to bear the pressure from the housing cover 12.A plurality of battery modules 2 are installed in the case 1, and the plurality of battery modules 2 are arranged one after another along the width direction of the case 1. In the present embodiment, the number of battery modules 2 is two, the two battery modules 2 are arranged at a distance from each other along the width direction of the case 1, and the space between the two battery modules 2 is filled with a structural adhesive 9. The battery modules 2 further include a CCS (Integrated Bus Bar) component 22, an insulating plate 23, an end plate 24, and a buffer plate 25. The CCS component 22 is located at the tip of the battery module 2, and the insulating plate 23 covers the CCS component 22 to ensure insulation protection. Each of the battery packs is respectively provided with two end plates 24, the two end plates 24 are spaced apart from each other along the length direction of the case 1, and a plurality of unit batteries 21 in the battery pack are clamped between the two end plates 24. Between the end plates 24 and the inner wall of the housing 1, a buffer plate 25 made of foam is clamped to play a role of buffering and energy absorption. The CCS component 22 includes a plurality of terminal rows, a plurality of positive and negative pole rows are distributed at the tip of the entire battery module 2, and each positive pole row or each negative pole row is respectively provided with a terminal row connected to the corresponding positive or negative pole, and the plurality of terminal rows are spaced apart in a width direction of the housing 1, and two adjacent terminal rows have a gap from each other.Accordingly, since the structure of the various positions / regions of the tip of the battery module 2 is different, the plurality of support members 3 are also provided with different structures to adapt to the installation space. A side surface of the support member 3 facing the battery module 2 is provided with a receiving slot configured to receive the CCS component 22. The CCS component 22 is located in the receiving slot of the support member 3 to prevent the tip of the housing 1 from directly pressing the CCS component 22, and thus to ensure a reliable connection between the CCS component 22 and the pole. In the present embodiment, the support member 3 includes a first support member 31, a second support member 32, and a third support member 33. The second support member 32 is disposed above the pressure relief valve 26. The third support member 33 is disposed at the joint between two adjacent battery packs. In order to ensure the installation stability of the support member 3, the second and first sides of the support member 3 are bonded and fixed to the case 1 and the battery module 2, respectively. That is, along the height direction of the case 1, the first side of the support member 3 is bonded and fixed to the battery module 2 by the structural adhesive 9, and the second side is bonded and fixed to the inner wall of the case cover 12 by the structural adhesive 9.Referring to FIG. 9, the first support member 31 includes a main support block 311 and a sub support block 312. A corresponding receiving slot on the first support element 31 is a first receiving slot 313. A first adhesive slit 314 is provided on a side of the main support block 311 facing the battery module 2. The sub support block 312 is provided on a side of the main support block 311 facing away from the battery module 2. A first end of the sub support block 312 is connected to the main support block 311, and a second end of the sub support block 312 is a free end, and the free end extends along the first direction in a direction away from the main support block 311. It is also understood that the sub support block 312 is provided perpendicular to the main support block 311, a first accommodation slot 313 is sandwiched between the main support block 311 and the sub support block 312, and the first accommodation slot 313 is configured to accommodate the CCS component 22 as well as the insulating plate 23. In installation, one side of the main support block 311, which has the first adhesive slot 314, abuts and is adhered and fixed to the shell of the single battery 21 by the structural adhesive 9. The second side of the main support block 311 and / or the second side of the sub support block 312 abuts the inner wall of the case cover 12 and is bonded and fixed by the structural adhesive 9. The first receiving slot 313 is provided to avoid the CCS component 22 and the insulating plate 23 located near the first support member 31. Since the CCS component 22 is located below the sub support block 312 in the present embodiment, it can be prevented that the pressure of the case cover 12 acts directly on the CCS component 22 and the pole, and thus it can be prevented that the circuit terminal portion of the battery module 2 is broken and deformed due to the external force. In some embodiments, the main support block 311 may also be provided to be higher than the sub support block 312, or the main support block 311 may be lower than the sub support block 312. The structure causes the main support block 311 and the sub support block 312 to be out of the same plane, so that a gap is formed between the main support block 311 or the sub support block 312 and the case cover 12 to receive a sufficient amount of the structural adhesive 9 and to improve the adhesive strength between the first support member 31 and the case cover 12.Referring to FIG. 10, the second support member 32 includes a first support block 321 and two second support blocks 322. A corresponding receiving slot on the second support element 32 is a second receiving slot 324. On a side surface of the first support block 321 facing the inner wall of the case cover 12, a second adhesive slit 325 is provided, which is configured to receive the structural adhesive 9, so that the second support member 32 is stably adhered to the case cover 12. Along the width direction of the second support block 322 (i.e., the width direction of the housing 1), two second support blocks 322 are disposed on a side surface of the first support block 321 facing the battery module 2 at a distance from each other. Further, the second support blocks 322 are spaced apart from an end portion of the first support block 321 along the width direction. A pressure relief channel 323 is enclosed between the first support block 321 and the two second support blocks 322. Between two ends of the first support block 321 along the first direction and the two second support blocks 322, a second accommodation slot 324 configured to accommodate the CCS component 22 and the insulating plate 23 is respectively included. In installation, one side of the first support block 321 having the second adhesive slit 325 abuts and fastened to the inner wall of the case cover 12 by the structural adhesive 9. The second support blocks 322 abut on the shell of the single battery 21 and cause the pressure relief valve 26 to be located between the two second support blocks 322 so as to enclose a pressure relief passage 323 between the first support block 321, the two second support blocks 322, and the single batteries 21. The second receiving slot 324 is provided to avoid the CCS component 22 and the insulating plate 23 being located near the second support member 32. Since the CCS component 22 is located below the first support block 321 in the present embodiment, it can be prevented that the pressure of the case cover 12 acts directly on the CCS component 22 and the pole, and thus it can be prevented that the circuit terminal portion of the battery module 2 is broken and deformed due to the external force.Referring to FIG. 11, the third support member 33 includes a third support block 331 and a fourth support block 332. A corresponding receiving slot on the third support element 33 is a third receiving slot 333. The third support block 331 is connected to the housing cover 12 of the housing 1, wherein a third adhesive slot is provided on a side surface of the third support block 331 facing the housing cover 12, said third adhesive slot being configured to receive the structural adhesive 9, so that the third support block 331 is stably bonded to the housing cover 12. The fourth support block 332 is disposed on a side surface of the third support block 331 facing the battery module 2, and the fourth support block 332 is connected to the battery module 2. In order to ensure the stability of the adhesion of the fourth support block 332, a third adhesive slot may also be provided on a side of the fourth support block 332 facing away from the third support block 331 in order to accommodate a sufficient amount of the structural adhesive 9. Along the width direction of the third support block 331 (i.e., the width direction of the housing 1), the fourth support block 332 is located at a center position of the third support block 331, and further, the fourth support block 332 is spaced apart from an end portion of the third support block 331 along the width direction. Between two ends of the third support block 331 along its width direction (the first direction) and the fourth support block 332, a third receiving slot 333 is included. The third accommodation slot 333 is provided to avoid the CCS component 22 and the insulating plate 23 located near the third support member 33. In the present embodiment, the third support member 33 is installed at the joint between two adjacent battery packs. In installation, one side of the third support block 331 having the third adhesive slot is adhered and fixed to the inner wall of the case cover 12, and the fourth support block 332 abuts and is adhered and fixed to the shell of the single battery 21 of the two adjacent battery packs. Since the CCS component 22 is located below the third support block 331, it can be prevented that the pressure of the case cover 12 acts directly on the CCS component 22 and the pole, and thus it can be prevented that the circuit terminal portion of the battery module 2 is broken and deformed due to the external force.In practice, the number and position of the support elements 3 can be expediently selected depending on the specific structural dimensions of the individual battery 21.As illustrated in FIGS. 1, 2, and 5, an electric vehicle including a vehicle body, seats 7, and an integrated battery pack is further provided. The integrated battery pack is mounted on the vehicle body, and the tip of the case 1 (i.e., the case cover 12) of the integrated battery pack is simultaneously used as the bottom of an occupant compartment of the vehicle body, thereby simplifying the structure of the entire vehicle. The seats 7 are installed on an installation bracket 123 on the case cover 12. The weight of the seats 7 and the occupants directly act on the case lid 12, Since the integrated battery pack includes the support member 3, the support member 3 is used to uniformly distribute the pressure from the case lid 12 to the entire integrated battery pack, thereby preventing deformation, distortion, etc. of the integrated battery pack due to concentrated force and improving the safety performance of the integrated battery pack.In the present embodiment, a plurality of support members 3 are disposed between the battery module 2 and the tip of the housing 1, a support function for the housing 1 is played by the support members 3, thereby the gravity of the seat 7 and the occupant can be uniformly transmitted to the entire battery module 2 through the support members 3, thereby preventing the gravity of the seat 7 and the occupant from concentrating on the connection point between the seat 7 and the housing 1 or the footrest portion of the occupant. With the arrangement of the support members 3, the structural strength and rigidity of the entire integrated battery pack is improved, and the occurrence of deformations and torsions of the entire vehicle is prevented. At the same time, by covering the pressure relief valve 26 of the battery module 2 by the support members 3, the high-temperature substance is isolated by the support members 3 when thermal runaway occurs in the battery module 2, which contributes to reducing the thermal effect on the tip of the case 1 and preventing the high-temperature substance from thermally affecting the passenger compartment.

Claims

An integrated battery pack comprising a housing (1), a battery module (2) and a plurality of support members (3), the housing (1) having a receiving cavity inside, the battery module (2) being installed in the receiving cavity, the battery module (2) having a pressure relief valve (26) at the tip, the plurality of support members (3) being spaced apart from each other at the tip of the battery module (2) and clamped between the battery module (2) and the housing (1), at least a part of the support members (3) covering the pressure relief valve (26), wherein a pressure relief channel (323) is enclosed between the support members (3) located on the pressure relief valve (26) and the battery module (2).The integrated battery pack according to claim 1, wherein two opposite sides of the support member (3) are bonded and fixed to the case (1) and the battery module (2), respectively.The integrated battery pack according to claim 1, wherein the battery module (2) comprises a plurality of battery packs arranged one after another along a first direction, each of the battery packs comprising a plurality of single batteries (21) arranged one after another along a second direction, the first direction being perpendicular to the second direction; wherein the support members (3) are provided in at least one of the following cases: that the battery module (2) is provided with a support member (3) at two ends along the first direction; or that a support member (3) is arranged at a connection location between two adjacent battery packs.The integrated battery pack according to claim 3, wherein the battery module (2) further comprises a CCS (Integrated Bus Bar) component (22), the CCS component (22) being connected to poles of the single batteries (21), the support members (3) being provided with a receiving slot provided for receiving the CCS component (22).The integrated battery pack according to claim 4, wherein in the case that the battery module (2) is provided with the support member (3) at two ends along the first direction, the support members (3) include a first support member (31) disposed at two ends of the battery module (2) along the first direction, the first support member (31) includes a main support block (311) and a sub support block (312), the sub support block (312) is disposed on a side of the main support block (311) opposite to the battery module (2), the free end of the sub support block (312) extends along the first direction in a direction away from the main support block (311), wherein the accommodation slot is sandwiched between the main support block (311) and the sub support block (312).The integrated battery pack according to claim 4, wherein the support members (3) include a second support member (32) covering the pressure relief valve (26), the second support member (32) including a first support block (321) and two second support blocks (322), the first support block (321) being connected to the case (1), the two second support blocks (322) being spaced apart from each other on a side surface of the first support block (321) facing the battery module (2), the two second support blocks (322) being connected to the battery module (2), the pressure relief channel (323) being enclosed between the first support block (321), the two second support blocks (322), and the single batteries (21), wherein the receiving slot is enclosed between two ends of the first support block (321) along the first direction and the two second support blocks (322).The integrated battery pack according to claim 4, wherein in the case that the support member (3) is disposed at a connection location between two adjacent battery sets, the support members (3) include a third support member (33) disposed at the connection location between two adjacent battery sets, the third support member (33) includes a third support block (331) and a fourth support block (332), the third support block (331) is connected to the case (1), the fourth support block (332) is disposed on a side surface of the third support block (331) facing the battery module (2), the fourth support block (332) is connected to the battery module (2), the accommodation slot is respectively enclosed between two ends of the third support block (331) along the first direction and the fourth support block (332).Integrated battery pack according to one of Claims 2 to 7, wherein a structural adhesive (9) is filled between two adjacent individual batteries (21).The integrated battery pack according to any one of claims 1 to 8, wherein it comprises a liquid cooling plate (6) disposed at the bottom of the accommodation cavity, wherein the battery module (2) is installed on the liquid cooling plate (6), wherein at least one of the space between the battery module (2) and the cavity wall of the accommodation cavity and the space between the liquid cooling plate (6) and the cavity bottom of the accommodation cavity is filled with a polystyrene.The integrated battery pack according to claim 9, wherein a plurality of temperature sensors (10) are disposed between the battery module (2) and the liquid cooling plate (6) with a distance from each other, the temperature sensors (10) being configured to detect the temperature of the battery module (2).The integrated battery pack according to any one of claims 1 to 8, wherein the housing (1) is provided with a tip installation bracket (123) configured to install a seat (7).An electric vehicle comprising a vehicle body, a seat (7) and an integrated battery pack according to any one of claims 1 to 11, wherein the integrated battery pack is installed on the vehicle body, wherein the seat (7) is installed on the case (1) of the integrated battery pack.

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