Battery module and battery system

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery module and a battery system, the battery module is composed of a battery shell, a battery cell assembly and a terminal assembly, an open battery cell accommodating space is arranged in the battery shell and is used for placing the battery cell assembly, and the terminal assembly is connected with the opening in a sealing manner; the exhaust part is arranged on the battery shell and is communicated with the space, and two sides of the battery shell are sealed by the terminal assembly, so that gas is directionally exhausted only through the exhaust part during thermal runaway, random eruption of thermal runaway airflow is effectively avoided, the risk of fire explosion caused by ignition of peripheral combustible materials by high-temperature airflow is greatly reduced, and the safety of the battery and the periphery is ensured; meanwhile, directional exhaust is convenient for fire fighting or maintenance personnel to efficiently carry out fire extinguishing and gas dredging work, accurately control the damage range of thermal runaway, maintain the stability of a battery system, prevent local thermal runaway from affecting the whole, and powerfully guarantee the overall performance of the battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery module and battery system. BACKGROUND

[0002] In today's new energy field, battery technology is widely used in electric vehicles, energy storage power stations and many other key scenes, with the continuous improvement of battery energy density, battery thermal runaway problem is increasingly prominent.

[0003] Under the prior art, when the battery occurs thermal runaway, the thermal runaway airflow will randomly erupt from each part of the battery, so that the high-temperature airflow randomly erupted is easy to ignite the surrounding combustible materials, causing fire and even explosion and other safety hazards, threatening the life safety of the user, and because the eruption is irregular, the subsequent fire extinguishing and gas dredging work is difficult to carry out, the thermal runaway hazard continues to expand, leading to the sharp decline of the performance of the battery. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide a battery module and battery system, which aims to solve the technical problem that the thermal runaway airflow of the existing battery easily randomly erupts from each part of the battery.

[0005] In order to realize the above-mentioned utility model purpose, the utility model provides a battery module, which comprises a battery shell, a cell assembly and a terminal assembly.

[0006] The battery shell forms a cell containing space with an opening in the battery shell, the cell assembly is arranged in the cell containing space, the terminal assembly is sealingly connected at the opening of the battery shell, and the battery shell is provided with an exhaust part, which is in communication with the cell containing space.

[0007] Further, the exhaust part comprises a plurality of first exhaust holes and second exhaust holes arranged at intervals, the first exhaust holes are arranged between adjacent second exhaust holes, and the first exhaust holes are in communication with the second exhaust holes.

[0008] Further, the cell assembly comprises a cell main body and a side sealant, the side sealant is sealingly connected on the side sealing edges arranged opposite to each other of the cell main body, and the side sealant is arranged opposite to the terminal assembly.

[0009] Further, the terminal assembly comprises an injection molding part and a parallel row, the cell assembly further comprises a cell tab connected with the cell main body, the parallel row comprises a lap joint part and an extension part, the injection molding part is connected with the lap joint part, the injection molding part and the lap joint part form a tab extension hole for the cell tab to extend out, and the extension part is connected at one end of the lap joint part for connecting a sampling assembly.

[0010] Further, the side of the injection molding part is provided with a plurality of mounting buckles, the battery shell is provided with a plurality of mounting holes corresponding to the mounting buckles, and the terminal assembly is connected to the battery shell by being connected in the mounting holes through the mounting buckles.

[0011] Further, the terminal assembly further comprises an insulating cover, the injection molding part is provided with a mounting column away from one side of the containing space, the insulating cover is provided with a fixing hole for the mounting column to pass through, and the insulating cover is connected to the injection molding part by penetrating the fixing hole through the mounting column.

[0012] The utility model further provides a battery system, including any one of the battery module, still include box and electric core pile, the electric core pile is formed by a plurality of battery module stacking, the box includes bottom plate subassembly, frame assembly and support beam subassembly, the frame assembly is provided on the bottom plate subassembly and is surrounded to form the box containing space, the support beam subassembly is provided in the box containing space and is surrounded to form the electric core storehouse for placing the electric core pile with the bottom plate subassembly, and the support beam subassembly and the frame assembly form the collision energy absorption region between them.

[0013] Further, the battery system further comprises electrical components and an explosion-proof valve, a high-pressure region and an exhaust region are further formed between the support beam assembly and the frame assembly, respectively corresponding to the collision energy absorption region, the high-pressure region is arranged opposite to the exhaust region, the electrical components are arranged in the high-pressure region, and the explosion-proof valve is arranged on the frame assembly and communicates with the exhaust region.

[0014] Further, the bottom plate assembly comprises a bottom plate main body and a bottom plate extension connected to the bottom plate main body, a plurality of cavities are formed in the bottom plate main body, a plurality of electric core pile exhaust holes are formed in the bottom plate main body and communicate with the cavities, the bottom plate extension is located in the exhaust region, and a bottom plate exhaust hole is formed in the bottom plate extension for communicating the electric core pile exhaust hole with the exhaust region.

[0015] Further, the battery system further comprises a sampling assembly and a series connection row arranged on the electric core pile, the sampling assembly comprises a sampling soft plate and a plurality of sampling sheets, the sampling soft plate is electrically connected to the sampling sheets, the series connection row is connected to one end of the sampling sheets away from the sampling soft plate, and the sampling sheets are connected to the terminal assembly through the series connection row.

[0016] Further, the battery system further comprises a plurality of high-voltage protective covers, the high-voltage protective covers are arranged on the electric core pile and correspond to the series connection row, and the high-voltage protective covers are connected to the terminal assembly.

[0017] Further, the battery system further comprises a plurality of liquid cooling plates connected to the cell stack through a heat-conducting structural adhesive, and the liquid cooling plates are connected to the support beam assembly.

[0018] Further, a plurality of reinforcing ribs are arranged on the liquid cooling plate, and the reinforcing ribs are protruded away from the cell stack.

[0019] Further, the battery system further comprises a cover plate arranged on the frame assembly, and a plurality of buffer foam are arranged between the cover plate and the liquid cooling plate.

[0020] Beneficial effects:

[0021] The utility model discloses a battery module, including battery shell, electric core subassembly and terminal subassembly, form the electric core containing space with the opening in the battery shell, electric core subassembly sets up in the electric core containing space, terminal subassembly sealedly connects at the opening of battery shell, be provided with exhaust portion on the battery shell, and the exhaust portion is linked together with the electric core containing space. Therefore because the both sides of battery shell are sealed by terminal subassembly, and the battery shell only has the exhaust portion at the bottom, when the electric core generates thermal runaway, the gas can only be discharged from the exhaust portion of the battery shell, realizes the directional exhaust of battery module, greatly reduces the fire and explosion safety hidden danger that the high temperature gas flow of random eruption ignites the combustible material of surrounding, guarantees the safety of battery and surrounding environment, and the directional discharge of high temperature gas helps more efficient implementation extinguishing and gas discharge operation, effectively control thermal runaway hazard range, maintains the stability of whole battery system, reduces the risk of system overall failure due to local thermal runaway, effectively guarantees the overall performance of battery. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the explosion diagram of the battery module of the utility model one embodiment;

[0023] Figure 2 It is the battery shell schematic view of the utility model one embodiment;

[0024] Figure 3 It is the electric core subassembly schematic view of the utility model one embodiment; Figure 2 It is the A place local enlarged view of the utility model one embodiment;

[0025] Figure 4 It is the electric core subassembly schematic view of the utility model one embodiment;

[0026] Figure 5 It is the terminal subassembly schematic view of the utility model one embodiment;

[0027] Figure 6 It is the insulating cover schematic view of the utility model one embodiment;

[0028] Figure 7 Exploded view of the battery system according to an embodiment of the present application;

[0029] Figure 8 Schematic view of the box according to an embodiment of the present application;

[0030] Figure 9 Schematic view of the bottom plate assembly according to an embodiment of the present application;

[0031] Figure 10 Partial enlarged view of B according to an embodiment of the present application; Figure 9

[0032] Figure 11 Top view of the battery system according to an embodiment of the present application;

[0033] Figure 12 Partial enlarged view of C according to an embodiment of the present application; Figure 11

[0034] Figure 13 Partial view of the battery system according to an embodiment of the present application;

[0035] Figure 14 Partial enlarged view of D according to an embodiment of the present application; Figure 13

[0036] Figure 15 Schematic view of the liquid cooling plate according to an embodiment of the present application.

[0037] Wherein:

[0038] 100, battery module; 200, battery system;

[0039] 1, battery shell; 2, cell assembly; 3, terminal assembly; 4, opening; 5, exhaust portion;

[0040] 20, cell main body; 21, cell tab; 22, side sealant; 23, expanded foam;

[0041] 30, injection molding portion; 31, parallel row; 32, tab extension hole; 33, mounting buckle; 34, mounting hole; 35, insulating cover; 36, mounting column; 37, fixing hole;

[0042] 310, lapping portion; 311, extension portion; 312, terminal buckle;

[0043] 50, first exhaust hole; 51, second exhaust hole;

[0044] ​​​6, box; 7, cell stack; 8, electrical component; 9, explosion-proof valve; 10, sampling assembly; 11, series row; 12, high-voltage protective cover; 13, cover buckle hole; 14, liquid cooling plate; 15, reinforcing rib; 16, cover plate; 17, buffer foam;

[0045] 101, sampling soft plate; 102, sampling sheet;

[0046] 60, bottom plate assembly; 61, frame assembly; 62, support beam assembly; 63, collision energy absorption area; 64, high-voltage area; 65, exhaust area; 66, cell compartment;

[0047] 601, bottom plate main body; 602, bottom plate extension; 603, cavity; 604, cell stack exhaust hole; 605, bottom plate exhaust hole;

[0048] 610, transverse frame; 611, longitudinal frame;

[0049] 620, longitudinal beam; 621, cross beam.

[0050] The realization, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0051] It should be understood that the specific embodiments described herein are merely intended to explain the utility model, and are not intended to limit the utility model.

[0052] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0053] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, can be direct connection, also can pass through intermediate medium indirectly connect, can be two element internal communication or two element mutual action relation.For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0054] In the utility model, unless another explicit provision and limitation, first feature is "on" or "under" second feature can include that first and second features are directly contacted, also can include that first and second features are not directly contacted but are contacted through other features between them.Moreover, first feature is "on", "above" and "upper surface" of second feature includes that first feature is directly above and obliquely above second feature, or just indicates that the horizontal height of first feature is higher than second feature.First feature is "under", "below" and "lower surface" of second feature includes that first feature is directly below and obliquely below second feature, or just indicates that the horizontal height of first feature is less than second feature.

[0055] Referring to Figures 1-3 The embodiment provides a battery module 100, including battery shell 1, electric core assembly 2 and terminal assembly 3;

[0056] The battery shell 1 is formed with the electric core containing space with opening 4, the electric core assembly 2 is arranged in the electric core containing space, the terminal assembly 3 is sealingly connected at the opening 4 of the battery shell 1, the battery shell 1 is provided with exhaust part 5, and the exhaust part 5 is communicated with the electric core containing space.

[0057] In the above embodiment, the battery module 100 comprises a battery shell 1, a battery cell assembly 2 and a terminal assembly 3, the battery shell 1 is a heat dissipation aluminum shell which is the external protection structure of the battery, and an internal battery cell accommodating space with an opening 4 is formed for placing the battery cell assembly 2, the opening 4 is located at both sides of the length direction of the battery shell 1, and there are two openings 4 in total, and one terminal assembly 3 is arranged at each opening 4, so as to ensure that both ends of the battery module 100 can be electrically connected, the terminal assembly 3 is sealed and connected to the opening 4 of the battery shell 1 by high-temperature resistant glue, the battery cell assembly 2 is inserted into the battery cell accommodating space from the opening 4 of the battery shell 1, and then is sealed and fixed by the terminal assembly 3, that is, the terminal assembly 3 is sealed and connected to the battery shell 1 at the opening 4 of the battery shell 1, and the battery shell 1 is provided with an exhaust part 5, wherein the exhaust part 5 is preferably arranged at the bottom of the battery shell 1, and the exhaust part 5 is communicated with the battery cell accommodating space, since the openings 4 at both sides of the battery shell 1 are sealed by the terminal assembly 3, when the battery is in thermal runaway, the high-temperature gas flow generated can only be discharged from the exhaust part 5 at the bottom of the battery shell 1, so as to realize directional exhaust of the battery module 100, greatly reduce the safety hidden danger of fire explosion caused by the high-temperature gas flow of random eruption igniting the surrounding combustible materials, and ensure the safety of the battery and the surrounding environment, and the directional exhaust of the high-temperature gas helps to more efficiently implement fire extinguishing and gas exhaust operation, effectively control the thermal runaway hazard range, maintain the stability of the whole battery system 200, reduce the risk of system overall failure caused by local thermal runaway, and effectively ensure the overall performance of the battery.

[0058] With reference to Figures 1-3 In an embodiment, the exhaust part 5 comprises a plurality of first exhaust holes 50 and second exhaust holes 51 arranged at intervals, the first exhaust holes 50 are arranged between adjacent second exhaust holes 51, and the first exhaust holes 50 are communicated with the second exhaust holes 51.

[0059] In the above embodiment, the exhaust part 5 comprises first exhaust holes 50 and second exhaust holes 51, the first exhaust holes 50 and the second exhaust holes 51 are respectively a plurality of, and the plurality of first exhaust holes 50 and the plurality of second exhaust holes 51 are respectively arranged at intervals, the first exhaust holes 50 are arranged between adjacent second exhaust holes 51, and the two are communicated with each other; the first exhaust holes 50 and the second exhaust holes 51 are both strip-shaped holes, which extend along the length direction of the battery shell 1, wherein the width of the first exhaust hole 50 is greater than the width of the second exhaust hole 51, and each second exhaust hole 51 is located at the middle position of its adjacent first exhaust hole 50, in addition, the second exhaust hole 51 extends towards the whole length direction of the battery shell 1 during extension, effectively avoiding the problem that the gas cannot be normally discharged due to the blockage of a single exhaust hole, and improving the exhaust efficiency of the high-temperature gas during thermal runaway.

[0060] With reference to Figures 1-4In an embodiment, the cell assembly 2 comprises a cell body 20 and side sealant 22, the side sealant 22 is sealingly connected to the opposite side sealing edges of the cell body 20, and the side sealant 22 is arranged opposite to the terminal assembly 3.

[0061] In the above embodiment, the cell assembly 2 comprises a cell body 20 and side sealant 22, and the cell assembly 2 is two or more, the two or more cell assemblies 2 can be connected together in series or parallel, and the expansion foam 23 is arranged between the two to absorb the volume expansion caused by temperature change, wherein the cell body 20 is a double-tab cell structure or a single-tab cell structure, and the cell body 20 is the core part of the battery. Taking the double-tab cell structure as an example, the two side sealants 22 are sealingly connected to the side sealing edges of the two side tabs of the cell body 20 in the width direction, i.e. the opposite side sealing edges, so that when the cell assembly 2 is placed in the cell containing space in the battery case 1, the side sealant 22 is arranged adjacent to the exhaust portion 5, ensuring that the high-temperature gas flow generated during thermal runaway can be ejected from the side sealing edges at the bottom or top of the cell body 20. Since the side sealant 22 seals the side sealing edges in the width direction of the cell body 20, it prevents the thermal runaway gas flow from directly damaging the seal between the terminal assembly 3 and the battery case 1, thereby ensuring that the gas can be directly discharged from the exhaust portion 5, reducing the risk of fire and explosion, and optimizing the overall performance of the battery.

[0062] Referring to Figures 1-5 In an embodiment, the terminal assembly 3 comprises an injection molding portion 30 and a parallel row 31, the cell assembly 2 further comprises a cell tab 21 connected to the cell body 20, the parallel row 31 comprises an overlapping portion 310 and an extension portion 311, the injection molding portion 30 is connected to the overlapping portion 310, and the injection molding portion 30 and the overlapping portion 310 form a tab extension hole 32 for the cell tab 21 to extend out, and the extension portion 311 is connected to one end of the overlapping portion 310 for connecting the sampling assembly 10.

[0063] In the above embodiment, the terminal assembly 3 is used to realize the electrical connection between the battery cell assembly 2 and the external circuit, including the injection molding part 30 and the parallel row 31, the battery cell assembly 2 also includes the battery cell tab 21 which is electrically connected with the battery cell body 20, the injection molding part 30 is connected with the parallel row 31, and the injection molding part 30 and the parallel row 31 are integrally formed by the injection molding process, which ensures the structural stability and durability of the entire terminal assembly 3, the tab extension hole 32 is formed between the injection molding part 30 and the parallel row 31, which is used for the battery cell tab 21 to pass through and connect with the parallel row 31, the parallel row 31 has an L-shaped structure, and the parallel row 31 includes the overlapping part 310 and the extension part 311, wherein the overlapping part 310 is the long side of the parallel row 31, the extension part 311 is the short side of the parallel row 31, and the overlapping part 310 and the extension part 311 are an integral piece, and the two parts form a complete conduction path through electrical connection, wherein the overlapping part 310 is connected with the injection molding part 30, so that the tab extension hole 32 is arranged between the overlapping part 310 and the injection molding part 30, and the extension part 311 is used to be electrically connected with the sampling assembly 10, in the initial state, the 180-degree battery cell tab 21 is bent 90 degrees after passing through the tab extension hole 32 and is lapped on the overlapping part 310, which transmits the current information from the battery cell to the extension part 311 and then to the sampling assembly 10, in addition, a plurality of mounting buckles 33 are arranged on the side of the injection molding part 30, a plurality of mounting holes 34 are arranged on the side of the battery shell 1, and the mounting buckles 33 and the mounting holes 34 are arranged correspondingly, that is, through the snap connection of the mounting buckles 33 and the mounting holes 34, the terminal assembly 3 is snap connected on the battery shell 1, which simplifies the assembly process and improves the installation efficiency of the terminal assembly 3 and the battery shell 1.

[0064] Referring to Figures 1-6 In an embodiment, the terminal assembly 3 further includes an insulating cover 35, the injection molding part 30 is provided with a mounting column 36 away from one side of the containing space, the insulating cover 35 is provided with a fixing hole 37 through which the mounting column 36 passes, and the insulating cover 35 is connected with the injection molding part 30 through the mounting column 36 penetrating the fixing hole 37.

[0065] In the above embodiment, the terminal assembly 3 further comprises an insulating cover 35, the injection molding part 30 is provided with a plurality of mounting columns 36 on the side away from the battery cell accommodating space, the insulating cover 35 is provided with fixing holes 37 through which the mounting columns 36 pass, each fixing hole 37 corresponds to one mounting column 36, so that the insulating cover 35 can be tightly connected with the injection molding part 30 in a manner that the mounting columns 36 penetrate the fixing holes 37, ensuring that the insulating cover 35 can be firmly fixed on the injection molding part 30, and the mounting columns 36 and the mounting buckles 33 are arranged adjacent to each other, the insulating cover 35 is a protective structure covering the battery cell tabs 21, after the battery cell tabs 21 are bent and lapped on the parallel rows 31, the insulating cover 35 is mounted on the injection molding part 30, completely covering the battery cell tabs 21, and a certain gap is formed between the insulating cover 35 and the battery cell tabs 21, preventing the battery cell tabs 21 from contacting other conductive parts to cause short circuit risk, avoiding direct exposure of the battery cell tabs 21, and reducing the risk of electrical short circuit.

[0066] With reference to Figure 1 , Figures 7-8 The utility model further provides a battery system 200, including any embodiment described above battery module 100 further includes box 6 and battery cell stack 7, battery cell stack 7 is formed by the stacking of a plurality of battery module 100, the box 6 includes bottom plate assembly 60, frame assembly 61 and support beam assembly 62, frame assembly 61 is set up on bottom plate assembly 60 and is enclosed to form the box 6 accommodating space, support beam assembly 62 is set up in the box 6 accommodating space with bottom plate assembly 60 and is enclosed to form the battery cell storehouse 66 for placing battery cell stack 7, and the support beam assembly 62 and frame assembly 61 form collision energy absorption area 63 between them.

[0067] In the above embodiment, the battery system 200, including the box 6 and the cell stack 7, wherein the cell stack 7 is formed by stacking a plurality of battery modules 100 in a certain order, the box 6 is composed of a bottom plate assembly 60, a frame assembly 61 and a support beam assembly 62, the bottom plate assembly 60 is the base part of the entire box 6, providing a stable support platform, the frame assembly 61 is arranged on the bottom plate assembly 60, and encloses a box 6 containing space with an open top 4, the frame assembly 61 is composed of two opposite transverse frames 610 and two opposite longitudinal frames 611, which form a solid overall frame by means of adjacent connection, the support beam assembly 62 is located in the box 6 containing space, and cooperates with the bottom plate assembly 60 to form a cell bin 66 for placing the cell stack 7, the battery standard module is not limited to being arranged horizontally in the box 6, but can also be arranged vertically in the box 6, the support beam assembly 62 includes a plurality of spaced longitudinal beams 620 and transverse beams 621, wherein the transverse beams 621 are connected between the two longitudinal frames 611 and parallel to the transverse frames 610, and the longitudinal beams 620 are connected between the two transverse beams 621 and parallel to the longitudinal frames 611, the support beam assembly 62 and the frame assembly 61 form a collision energy absorption area 63, wherein the collision energy absorption area 63 can be formed by the two opposite longitudinal frames 611 and the two longitudinal beams 620 opposite the longitudinal frames 611, or by the two opposite transverse frames 610 and the two transverse beams 621 opposite the transverse frames 610, and the collision energy absorption area 63 extends along the length direction of the entire longitudinal beam 620 or transverse beam 621, which can effectively absorb and disperse energy when subjected to external impact, reducing direct damage to the internal battery module 100 and prolonging the service life of the battery system 200.

[0068] Referring to Figures 7-8 In an embodiment, the battery system 200 further includes electrical components 8 and explosion-proof valves 9, and the support beam assembly 62 and the frame assembly 61 further form high-pressure areas 64 and exhaust areas 65 arranged corresponding to the collision energy absorption areas 63, respectively, and the high-pressure areas 64 and the exhaust areas 65 are arranged opposite to each other, the electrical components 8 are arranged in the high-pressure areas 64, and the explosion-proof valves 9 are arranged on the frame assembly 61 and communicate with the exhaust areas 65.

[0069] In the above embodiment, the battery system 200 further comprises electrical components 8 and explosion-proof valves 9, the electrical components 8 refer to various electronic devices or elements installed in the battery system 200, used to realize the functions of electrical connection, monitoring and control between the battery modules 100; the explosion-proof valves 9 are safety devices for preventing explosion caused by excessive internal pressure of the battery system 200; the support beam assembly 62 and the frame assembly 61 further form a high-pressure area 64 and an exhaust area 65 arranged oppositely, so that the cell exhaust channel is separated from the high-pressure components, realizing thermal and electrical separation, avoiding short circuit, insulation, arc drawing and other problems caused by cell spewing during thermal runaway, reducing the risk of secondary heat spread, the high-pressure area 64 and the exhaust area 65 are arranged corresponding to the collision energy-absorbing area 63, that is, when the collision energy-absorbing area 63 is formed by the two opposite longitudinal frames 611 and the two longitudinal beams 620 opposite to the longitudinal frames 611, the exhaust area 65 and the high-pressure area 64 are formed by the two opposite transverse frames 610 and the two transverse beams 621 opposite to the transverse frames 610, so that the exhaust area 65 and the high-pressure area 64 are arranged adjacent to the collision energy-absorbing area 63, the high-pressure area 64 is used to accommodate the electrical components 8 and other high-voltage electrical equipment, the electrical components 8 are fixed on the bottom plate assembly 60 and the frame assembly 61 to avoid damage to the high-voltage electrical equipment caused by external impact; the exhaust area 65 is mainly used to guide and discharge the high-temperature gas generated inside the battery system 200 to prevent its accumulation from causing danger, the explosion-proof valves 9 are directly installed on the frame assembly 61 and communicate with the exhaust area 65, ensuring that the gas can be discharged in time to maintain the pressure balance inside the system and ensure the safety of the system.

[0070] Referring to Figures 7-10 In an embodiment, the bottom plate assembly 60 comprises a bottom plate body 601 and a bottom plate extension 602 connected to the bottom plate body 601, a plurality of cavities 603 are formed in the bottom plate body 601, and cell stack exhaust holes 604 are arranged on the bottom plate body 601 and communicate with the cavities 603, the bottom plate extension 602 is located in the exhaust area 65, and a bottom plate exhaust hole 605 is arranged on the bottom plate extension 602 to communicate the cell stack exhaust holes 604 with the exhaust area 65.

[0071] In the above embodiment, the bottom plate assembly 60 comprises a bottom plate body 601 and a bottom plate extension 602, which are connected in one body, the bottom plate body 601 is internally formed with a plurality of cavities 603, the plurality of cavities 603 in the bottom plate body 601 are arranged at intervals, these cavities 603 are used to guide and discharge the gas discharged from the cell stack exhaust hole 604, the bottom plate body 601 is provided with a cell stack exhaust hole 604 in communication with the cavity 603, the exhaust hole on each cell shell corresponds to the cell stack exhaust hole 604 on the bottom plate, ensuring that the gas can smoothly enter the cavity 603 of the bottom plate, the bottom plate extension 602 is internally provided with a cavity 603 in communication with the bottom plate body 601, the bottom plate extension 602 is located in the exhaust area 65, and when the support beam assembly 62 is placed in the accommodating space of the box body 6, the cell stack exhaust hole 604 is separated from the bottom plate exhaust hole 605 by the cross beam 621, avoiding direct contact and potential interference, and the bottom plate exhaust hole 605 is provided in the area, for communicating the cavity 603 in the bottom plate body 601 with the exhaust area 65, the gas can enter the cavity 603 of the bottom plate body 601 from the cell stack exhaust hole 604, then enter the exhaust area 65 through the bottom plate exhaust hole 605 on the bottom plate extension 602, so that the gas is finally discharged through the explosion-proof valve 9, not only reducing the safety hazard caused by gas accumulation, but also improving the overall thermal runaway exhaust efficiency of the system, prolonging the service life of the battery module 100.

[0072] Referring to Figures 7-12 In an embodiment, the battery system 200 further comprises a sampling assembly 10 and a series row 11 arranged on the cell stack 7, the sampling assembly 10 comprises a sampling soft plate 101 and a plurality of sampling sheets 102, the sampling soft plate 101 is electrically connected with the sampling sheet 102, the series row 11 is connected at one end of the sampling sheet 102 away from the sampling soft plate 101, and the sampling sheet 102 is connected with the terminal assembly 3 through the series row 11.

[0073] In the above embodiment, the battery system 200 further comprises a sampling assembly 10 and a series row 11 for monitoring and managing the electrical performance of the plurality of battery modules 100, the sampling assembly 10 and the series row 11 are respectively arranged at the top of the cell stack 7, the sampling assembly 10 comprises a sampling soft board 101 and a plurality of sampling sheets 102, the sampling soft board 101 is a kind of flexible circuit board, and is electrically connected with the plurality of sampling sheets 102, the material of the sampling soft board 101 is preferably PI (Polyimide), the sampling soft board 101 is relatively narrow, has high utilization rate and low cost, the sampling sheet 102 is usually made of nickel sheet, the sampling sheets 102 are connected with each other through the sampling soft board 101 to form a complete sampling network, and the series row 11 is a component for connecting the terminal assembly 3 of the adjacent two battery modules 100, which is fixed on the extension part 311 of the parallel row 31 in the terminal assembly 3 by welding, and the sampling sheet 102 is connected at the middle position of the series row 11, that is, the sampling sheet 102 is connected with the extension part 311 of the terminal assembly 3 through the series row 11, so that each sampling sheet 102 can accurately collect the working state information of the corresponding battery module 100, such as voltage, temperature and other parameters, and the information is transmitted to the external monitoring equipment through the sampling soft board 101 to realize real-time monitoring of the running state of the battery system 200, accurate monitoring of the working state of each battery module 100, timely discovery and processing of potential problems, and improvement of the safety and reliability of the battery system 200.

[0074] Referring to Figures 7-14 In an embodiment, the battery system 200 further comprises a plurality of high-voltage protective covers 12, the high-voltage protective covers 12 are arranged on the cell stack 7 corresponding to the series row 11, and the high-voltage protective covers 12 are connected to the terminal assembly 3.

[0075] In the above embodiment, the battery system 200 further comprises a plurality of high-voltage protective covers 12 installed on the cell stack 7, which mainly prevent external environment from interfering with and damaging the series connection row 11 and the terminal assembly 3. The high-voltage protective cover 12 is arranged at a position corresponding to the series connection row 11 on the cell stack 7, and extends along the length direction of the entire cell stack 7, and is fixed on the terminal assembly 3 by a buckle connection. Specifically, the high-voltage protective cover 12 is provided with a cover buckle hole 13 for cooperating with a terminal buckle 312 in the terminal assembly 3 to achieve firm buckle connection. The terminal assembly 3 is provided with the terminal buckle 312 on the side of the extension part 311 of the parallel connection row 31. When the high-voltage protective cover 12 is buckled to the terminal buckle 312 through the cover buckle hole 13, the extension part 311 of the parallel connection row 31 and the series connection row 11 can be completely shielded, effectively preventing external dust, moisture and other pollutants from entering the key electrical connection area. The high-voltage protective cover 12 can be disassembled and reinstalled, which not only improves the protection level of the system, but also simplifies the maintenance and repair work, and enhances the stability and safety of the entire battery system 200.

[0076] Referring to Figures 7-15 In an embodiment, the battery system 200 further comprises a plurality of liquid cooling plates 14 connected to the cell stack 7 by a heat-conducting structural adhesive, and connected to the support beam assembly 62.

[0077] In the above embodiment, the battery system 200 further comprises a plurality of liquid cooling plates 14, which are heat dissipation devices installed on the top of the cell stack 7. The liquid cooling plate 14 is connected to the top of the cell stack 7 by a heat-conducting structural adhesive to form an integral structure, ensuring that heat can be quickly transferred from the cell stack 7 to the liquid cooling plate 14, so that heat can be dissipated in time. The liquid cooling plate 14 is connected to the support beam assembly 62 by bolts, and the support beam assembly 62 provides additional support to prevent the liquid cooling plate 14 from being displaced or deformed due to external pressure or vibration. In addition, a plurality of reinforcing ribs 15 are provided on the liquid cooling plate 14, which protrude away from the cell stack 7, effectively enhancing the mechanical strength of the liquid cooling plate 14. Further, the battery system 200 further comprises a cover plate 16 arranged on the frame assembly 61 above the liquid cooling plate 14. The cover plate 16 is fixedly connected to the longitudinal frame 611 and the transverse frame 610 of the frame assembly 61 by bolts, and a plurality of buffer foam 17 are arranged between the cover plate 16 and the liquid cooling plate 14. The buffer foam 17 avoids direct contact between the cover plate 16 and the liquid cooling plate 14, effectively absorbs the stress caused by mechanical vibration or impact, protects the liquid cooling plate 14 from damage, ensures the close fit and good heat dissipation effect between the cell stack 7, the liquid cooling plate 14 and the cover plate 16, and improves the anti-seismic ability and safety of the system.

[0078] The above merely describes preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made by using the content of the present application specification and drawings, are also included in the patent protection scope of the present application.

Claims

1. A battery module, characterized by, The battery system comprises a battery shell, a cell assembly and a terminal assembly. The battery shell is provided with an open cell accommodating space, the cell assembly is arranged in the cell accommodating space, the terminal assembly is sealingly connected at the opening of the battery shell, and the battery shell is provided with an exhaust part in communication with the cell accommodating space.

2. The battery module of claim 1, wherein, The exhaust part comprises a plurality of first exhaust holes and second exhaust holes arranged at intervals, the first exhaust holes are arranged between adjacent second exhaust holes, and the first exhaust holes are in communication with the second exhaust holes.

3. The battery module of claim 1, wherein, The cell assembly comprises a cell body and side sealant, the side sealant is sealingly connected on the opposite side sealing edges of the cell body, and the side sealant is arranged opposite to the terminal assembly.

4. The battery module of claim 3, wherein, The terminal assembly comprises an injection molding part and a parallel row, the cell assembly further comprises a cell tab connected to the cell body, the parallel row comprises a lap joint part and an extension part, the injection molding part is connected to the lap joint part, an tab extension hole is formed between the injection molding part and the lap joint part for the cell tab to extend out, and the extension part is connected to one end of the lap joint part for connecting a sampling assembly.

5. The battery module of claim 4, wherein, The side edge of the injection molding part is provided with a plurality of mounting buckles, the battery shell is provided with a plurality of mounting holes corresponding to the mounting buckles, and the terminal assembly is connected to the battery shell by being connected in the mounting holes through the mounting buckles.

6. The battery module of claim 4, wherein, The terminal assembly further comprises an insulating cover, the side of the injection molding part away from the accommodating space is provided with a mounting column, the insulating cover is provided with a fixing hole for the mounting column to pass through, and the insulating cover is connected to the injection molding part by penetrating the fixing hole through the mounting column.

7. A battery system comprising the battery module of any one of claims 1-6, wherein, The battery system further comprises a box body and a cell stack, the cell stack is formed by stacking a plurality of battery modules, the box body comprises a bottom plate assembly, a frame assembly and a support beam assembly, the frame assembly is arranged on the bottom plate assembly to form a box accommodating space, the support beam assembly is arranged in the box accommodating space to form a cell bin for placing the cell stack together with the bottom plate assembly, and a collision energy absorption area is formed between the support beam assembly and the frame assembly.

8. The battery system of claim 7, wherein, The battery system further comprises electrical components and an explosion-proof valve, a high-pressure area and an exhaust area corresponding to the collision energy absorption area are further formed between the support beam assembly and the frame assembly, the high-pressure area and the exhaust area are arranged opposite to each other, the electrical components are arranged in the high-pressure area, and the explosion-proof valve is arranged on the frame assembly in communication with the exhaust area.

9. The battery system of claim 8, wherein, The bottom plate assembly comprises a bottom plate body and a bottom plate extension connected to the bottom plate body, a plurality of cavities are formed in the bottom plate body, the bottom plate body is provided with cell stack exhaust holes in communication with the cavities, the bottom plate extension is located in the exhaust area, and a bottom plate exhaust hole is arranged on the bottom plate extension for connecting the cell stack exhaust holes and the exhaust area.

10. The battery system of claim 7, wherein, The battery system further comprises a sampling assembly and a series connection row arranged on the cell stack, the sampling assembly comprises a sampling soft plate and a plurality of sampling pieces, the sampling soft plate is electrically connected with the sampling pieces, the series connection row is connected at one end of the sampling pieces away from the sampling soft plate, and the sampling pieces are connected with the terminal assembly through the series connection row.

11. The battery system of claim 10, wherein, The battery system further comprises a plurality of high-voltage protection covers arranged on the cell stack corresponding to the series connection row, and the high-voltage protection covers are connected on the terminal assembly.

12. The battery system of claim 7, wherein, The battery system further comprises a plurality of liquid cooling plates connected on the cell stack through heat-conducting structural adhesive, and the liquid cooling plates are connected with the support beam assembly.

13. The battery system of claim 12, wherein, A plurality of reinforcing ribs are arranged on the liquid cooling plate, and the reinforcing ribs are protruded away from the cell stack.

14. The battery system of claim 12, wherein, The battery system further comprises a cover plate arranged on the frame assembly, and a plurality of buffer foam pieces are arranged between the cover plate and the liquid cooling plate.

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