Collecting device and power battery

Abstract

The invention belongs to the technical field of batteries, and discloses a collection device and a power battery, the collection device is used for being connected to a battery module, the collection device comprises a collection shell, a collection part and a plurality of plug-in parts, the collection shell is covered by a first protection shell and a second protection shell to form a containing cavity, and a collection main body in the collection part is located in the containing cavity; the plug-in component is arranged on the first protective shell and is connected with the acquisition main body and the battery module. Different from a traditional collection device which is connected with a battery module through a busbar to collect data, the collection device is directly connected with the battery module to collect data, complex operations such as wiring, fixing and connecting of the busbar are not needed any more, installation steps are greatly reduced, installation complexity is reduced, time and labor cost are saved, and meanwhile installation efficiency is improved. Space reserved for the busbar is avoided, so that the layout of the battery system is more compact, and the space utilization rate of the battery system is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a collection device and a power battery. Background Art

[0002] In the field of battery module data collection, the existing technology has many shortcomings. In the battery module disclosed in the existing patent document "CN206976424U", a collection device is used to collect data by plugging and connecting a bus, which is then connected to the battery module. In this way, battery data collection involves many components, and the connection and installation steps between the components are cumbersome, which greatly increases the complexity and time cost of installation. At the same time, many components occupy a large amount of space, resulting in low space utilization of the entire battery system. Summary of the Invention

[0003] The main purpose of the present invention is to provide a data acquisition device and a power battery, aiming to solve the technical problems that the existing battery data acquisition involves many components, resulting in cumbersome installation between the components and low space utilization of the entire battery system.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides a collection device for connecting to a battery module, comprising a collection housing, a collection component and a plurality of plug-in components; The collection housing includes a first protective shell and a second protective shell, wherein the second protective shell covers the first protective shell to form a receiving cavity; The collecting component includes a collecting body located in the accommodating cavity. The plug-in component is provided on the first protective shell, and the plug-in component is respectively connected to the collecting body and the battery module.

[0005] Furthermore, the first protective shell includes a first protective body, the plug-in component includes a connecting plate and a plug-in body, the first protective body is provided with an accommodating protrusion, the connecting plate is arranged in the accommodating protrusion, and the plug-in body is connected to the connecting plate and passes through the accommodating protrusion.

[0006] Furthermore, the first protective shell also includes a second protective body arranged on the first protective body, the collection component also includes a collection connection line connected to the collection body, a limiting groove is set on the side of the second protective body, and a limiting plate corresponding to the limiting groove is set on the side of the second protective shell, and the limiting plate is set in the limiting groove to form a limiting hole for the collection connection line to pass through.

[0007] Furthermore, the plug-in body includes a plug-in column and a connecting column, the connecting column is arranged on the connecting plate, the plug-in column is arranged at one end of the connecting column away from the connecting plate, and the circumference of an end face of the plug-in column close to the connecting column is greater than the circumference of an end face of the plug-in column away from the connecting column.

[0008] Furthermore, the plug-in column is provided with at least two notches recessed toward the connecting column, and the two notches are arranged opposite to each other.

[0009] Furthermore, a plug plastic portion is further provided on the first protective shell, and the plug plastic portion is sleeved on the connecting column and connected to the accommodating protrusion.

[0010] Furthermore, the collection body includes a sampling plate and a plurality of sampling strips, the sampling plate is connected to the collection connection line, one end of the sampling strip is connected to the sampling plate, and the other end of the sampling strip away from the sampling plate is connected to the connecting plate.

[0011] The present invention also proposes a power battery, comprising the collection device described in any one of the above embodiments, and also comprising a box and a battery module, wherein the box is provided with a storage compartment for placing the battery module, and a socket assembly is provided on the side of the battery module close to the collection device, and the collection device is connected to the battery module by being plugged into the socket assembly through a plug-in component.

[0012] Furthermore, the socket assembly includes a socket body and a guide portion, the socket body is connected to the battery module, the guide portion is arranged at the bottom of the socket body, and a socket groove is provided at one end of the socket body close to the guide portion.

[0013] Furthermore, the power battery also includes an explosion-proof valve, and an exhaust channel is also provided in the box body, the exhaust channel includes a first exhaust channel and a second exhaust channel, the containing chamber, the first exhaust channel and the second exhaust channel are connected in sequence, and the explosion-proof valve is provided on the box body and is connected to the second exhaust channel.

[0014] Furthermore, the first exhaust channel includes a first exhaust hole and a second exhaust hole. The first exhaust hole and the second exhaust hole are respectively in plurality and arranged at intervals, and the first exhaust hole and the second exhaust hole are staggered.

[0015] Furthermore, the power battery further includes a protective film, which is disposed in the accommodation chamber and located between the battery module and the first exhaust channel.

[0016] Furthermore, the power battery also includes a liquid cooling box cover and a heat conducting part, the heat conducting part is arranged on the battery module, the liquid cooling box cover is arranged on a side of the heat conducting part away from the battery module, and the liquid cooling box cover is connected to the box body.

[0017] Beneficial effects: The present invention provides a data collection device for connection to a battery module, comprising a data collection housing, a data collection component, and a plurality of plug-in components; the data collection housing comprises a first protective shell and a second protective shell, the second protective shell covering the first protective shell to form a receiving cavity; the data collection component comprises a data collection body located within the receiving cavity, the plug-in components are disposed on the first protective shell, and the plug-in components are respectively connected to the data collection body and the battery module. Therefore, compared to a data collection device that collects relevant data by connecting to a battery module via a bus, the data collection device of the present invention is directly connected to the battery module to collect relevant data, eliminating the need for wiring, fixing, and connecting the bus to the data collection device and the battery module. This reduces the number of installation steps, reduces the complexity of installation, saves installation time and labor costs, and avoids reserving space for the bus, making the layout within the battery system more compact and effectively improving the space utilization of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An exploded view of a collection device according to an embodiment of the present invention; Figure 2 An embodiment of the present invention Figure 1 A local enlarged view of point A; Figure 3 A schematic diagram of a plug-in component according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a collection device according to an embodiment of the present invention; Figure 5 An embodiment of the present invention Figure 4 A partial enlarged view of point B; Figure 6 An embodiment of the present invention Figure 4 A partial enlarged view of point C; Figure 7 This is a schematic diagram of a power battery according to an embodiment of the present invention; Figure 8 A cross-sectional view of a battery module and a socket assembly according to an embodiment of the present invention; Figure 9 A cross-sectional view of a battery module and a box according to an embodiment of the present invention; Figure 10 This is a top view of a box according to an embodiment of the present invention.

[0019] in: 100. Collection device; 200. Power battery; 1. Collection shell; 2. Collection components; 3. Plug-in components; 10. First protective shell; 11. Second protective shell; 101. First protective body; 102. Second protective body; 103. Plastic portion of plug; 104. Accommodating bump; 105. Limiting groove; 110. Third protection body; 111. Fourth protection body; 112. Limiting plate; 113. Limiting hole; 20. Collection subject; 21. Collection connection line; 201. Sampling plate; 202. Sampling strip; 210. Connecting cable body; 211. Connecting cable connector; 30. Connecting plate; 31. Plug-in body; 310, plug-in column; 311, connecting column; 312, notch; 4. Box body; 5. Battery module; 6. Storage compartment; 7. Connector assembly; 8. Explosion-proof valve; 9. Exhaust channel; 12. Protective film; 13. Liquid cooling box cover; 14. Heat transfer unit; 15. Bottom plate; 70. Socket body; 71. Guide portion; 72. Socket slot; 90. First exhaust channel; 91. Second exhaust channel; 901, first exhaust hole; 902, second exhaust hole; 150, upper base plate; 151, lower base plate.

[0020] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0021] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0025] Reference Figure 1-Figure 2 , this embodiment provides a collection device 100 for connecting to a battery module 5, comprising a collection housing 1, a collection component 2 and a plurality of plug-in components 3; The collection housing 1 includes a first protective shell 10 and a second protective shell 11, wherein the second protective shell 11 covers the first protective shell 10 to form a receiving cavity; The collecting component 2 includes a collecting body 20 located in the accommodating cavity. The plug-in component 3 is provided on the first protective shell 10 , and the plug-in component 3 is connected to the collecting body 20 and the battery module 5 , respectively.

[0026] In the above embodiment, the collection device 100 is a device for directly connecting to the battery module 5 and collecting relevant data thereof, wherein the collection shell 1 is composed of a first protective shell 10 and a second protective shell 11, which are covered to form a accommodating cavity for protecting the internal collection component 2 from the influence of the external environment. The collection component 2 includes a collection body 20, which is located in the above-mentioned accommodating cavity and is responsible for collecting relevant data of the battery module 5, such as voltage, current or temperature. The plug-in component 3 is a component for realizing electrical connection between the collection device 100 and the battery module 5. Each string of cells or cell stacks of the battery module 5 is provided with a socket assembly 7 that matches the plug-in component 3 of the collection device 100. When the collection device is working, data signals such as current are transmitted from the battery module 5 through the socket assembly 7 to the plug-in component 3, and then through The plug-in component 3 is transmitted to the collection component 2, realizing a function similar to that of a bus in collecting and transmitting data, so that the plug-in component 3 is integrated with the corresponding bus function; the plug-in component 3 is arranged on the first protective shell 10, one end of which is connected to the collection body 20, and the other end is directly plugged into the battery module 5. Therefore, compared with the collection device 100 connecting to the battery module 5 through the bus to collect relevant data, the collection device 100 of the present invention is directly connected to the battery module 5 to collect relevant data. There is no need to wire, fix the bus, and connect it with the collection device 100 and the battery module 5, which reduces the installation steps, reduces the complexity of installation, saves installation time and labor costs, and avoids reserving space for the bus, making the layout within the battery system more compact, and effectively improving the space utilization of the battery system.

[0027] Reference Figure 1-Figure 4 In one embodiment, the first protective shell 10 includes a first protective body 101, the plug-in component 3 includes a connecting plate 30 and a plug-in body 31, the first protective body 101 is provided with an accommodating protrusion 104, the connecting plate 30 is arranged in the accommodating protrusion 104, and the plug-in body 31 is connected to the connecting plate 30 and passes through the accommodating protrusion 104.

[0028] In the above embodiment, the first protective shell 10 includes a first protective body 101, and the plug-in component 3 includes a connecting plate 30 and a plug-in body 31. The material of the connecting plate 30 is preferably plastic, and the material of the plug-in body 31 is preferably copper. The first protective body 101 is the main frame structure of the first protective shell 10, which is used to provide basic support and protection functions. A receiving protrusion 104 is provided on the first protective body 101. The receiving protrusion 104 is provided on the first protective body 101 and protrudes upward to form an internal receiving space. The receiving space is specifically used to place the connecting plate 3 0, the spatial layout of the first protective body 101 is optimized, making the entire collection device 100 more compact, and the connecting plate 30 and the plug-in body 31 are designed as an integrated piece. Specifically, the connecting plate 30 is fixedly installed in the accommodating protrusion 104, and the plug-in body 31 passes through the through hole at the top of the accommodating protrusion 104, thereby realizing connection with the external battery module 5. The plug-in component 3 and the first protective body 101 are manufactured using an integrated injection molding process, which not only enhances the integrity of the entire device structure, but also avoids the looseness or poor contact problems that may be caused by traditional assembly methods.

[0029] Reference Figures 1-6 In one embodiment, the first protective shell 10 further includes a second protective body 102 arranged on the first protective body 101, the collecting component 2 further includes a collecting connection line 21 connected to the collecting body 20, a limiting groove 105 is provided on the side of the second protective body 102, and a limiting plate 112 corresponding to the limiting groove 105 is provided on the side of the second protective shell 11. The limiting plate 112 is arranged in the limiting groove 105 to form a limiting hole 113 for the collecting connection line 21 to pass through.

[0030] In the above embodiment, the first protective shell 10 also includes a second protective body 102, which is arranged on a side of the first protective body 101 close to the second protective shell 11, and the second protective body 102 is in a vertical connection with the first protective body 101. The collecting component 2 includes a collecting connection line 21 connected to the collecting body 20, wherein the first protective body 101 and the second protective body 102 are integrated and connected to form an L-shaped structure for accommodating the collecting body 20 and the connecting plate 30. The second protective shell 11 is composed of a third protective body 110 and a fourth protective body 111. The fourth protective body 111 is arranged on a side of the third protective body 110 close to the first protective shell 10, and the fourth protective body 111 is in a vertical connection with the third protective body 110. The two are also integrated and connected to form an L-shaped structure. The third protective body 110 covers the first protective body 101, and the fourth protective body 111 covers the second protective body 102, together completing the protection of the collecting body 20. A limiting groove 105 is provided on one side of 102, and the side is preferably located on the side in the width direction of the second protective body 102, that is, the side of the second protective body 102 close to the electrical device in the battery system, so as to facilitate the connection of the collection component 2 to the electrical device. A limiting plate 112 corresponding to the limiting groove 105 is provided on the side of the second protective shell 11. When the second protective shell 11 is covered on the first protective shell 10, the limiting plate 112 is located in the limiting groove 105, and a certain gap is formed between the top of the limiting plate 112 and the bottom of the limiting groove 105. The gap is a limiting hole 113. The collection connection line 21 includes a connection line body 210 and a connection line connector 211. The connection line body 210 is a plate-shaped design and is connected to the collection body 20. The limiting hole 113 is mainly for the connection line body 210 of the collection connection line 21 to pass through. The thickness of the connection line body 210 is equal to that of the limiting hole 113. The connection line connector 211 is located at the end away from the collection body 20 and is used to connect with other equipment or systems, effectively fixing the collection connection line 21 and avoiding the problem of loosening due to vibration or external force.

[0031] Reference Figure 1-Figure 5 In one embodiment, the plug-in body 31 includes a plug-in column 310 and a connecting column 311, the connecting column 311 is arranged on the connecting plate 30, the plug-in column 310 is arranged at one end of the connecting column 311 away from the connecting plate 30, and the circumference of an end surface of the plug-in column 310 close to the connecting column 311 is greater than the circumference of an end surface of the plug-in column 310 away from the connecting column 311.

[0032] In the above embodiment, the plug-in body 31 is composed of a plug-in column 310 and a connecting column 311. Among them, the connecting column 311 is preferably a cylindrical structure, one end of which is fixed on the connecting plate 30 to play a supporting and conductive role, and the other end is connected to the plug-in column 310. The plug-in column 310 is preferably a truncated cone design, and the circumference of the end face close to the connecting column 311 is larger, and the circumference of the end face away from the connecting column 311 is smaller, so that the diameter of the plug-in column 310 gradually decreases from the end close to the connecting column 311 to the end away from the connecting column 311, which makes it easier to align and enter when inserting into the corresponding interface of the battery module 5. Its gradually shrinking diameter helps to reduce friction during the insertion process and improve the plugging efficiency; the first protective shell 10 is also provided with a plug plastic part 103, which is sleeved on the connecting column 311 and connected to the accommodating protrusion 104. The plug plastic part 103 and the accommodating protrusion 104 are manufactured using an integrated injection molding process. The plug plastic part 103 tightly wraps the outer surface of the connecting column 311, so that a seamless connection is formed between the plug plastic part 103 and the accommodating protrusion 104, effectively preventing the external environment (such as dust and moisture) from affecting the connecting plate 30 inside the accommodating protrusion 104, thereby improving the protection performance of the entire device.

[0033] Furthermore, the plug-in column 310 is provided with a notch 312 that is recessed toward the connecting column 311. The notch 312 is a structure formed by the top surface of the plug-in column 310 being recessed downward. There are at least two notches 312, which are distributed on the top surface of the plug-in column 310 in a relative arrangement. Every two opposing notches 312 form a group, are located on the same diameter and are symmetrical to each other, effectively reducing the friction resistance of the plug-in column 310 when it is inserted into the corresponding socket on the battery module 5, making the plug-in operation smoother, and can ensure the firmness of the connection between the collection device 100 and the battery module 5 after the plug-in column 310 is inserted.

[0034] Furthermore, the collection body 20 is composed of a sampling plate 201 and a plurality of sampling strips 202, wherein the sampling plate 201 is a planar structure for receiving and processing signal data from the battery module 5. It is connected to an external device through an acquisition connection line 21 to realize data transmission, while the sampling strip 202 plays the role of signal conduction, one end of which is connected to the sampling plate 201 and the other end is connected to the connecting plate 30. The sampling strip 202 is designed to be L-shaped, which matches the structure of the first protective shell 10, can make full use of the internal space, and ensure that the layout of the entire device is more compact.

[0035] Reference Figure 1-Figure 3 、 Figure 7-Figure 8The present invention also proposes a power battery 200, comprising the collection device 100 described in any of the above embodiments, and further comprising a box 4 and a battery module 5, wherein the box 4 is provided with a storage compartment 6 for placing the battery module 5, and a socket assembly 7 is provided on the side of the battery module 5 close to the collection device 100, and the collection device 100 is connected to the battery module 5 by being plugged into the socket assembly 7 through a plug-in component 3.

[0036] In the above embodiment, the power battery 200 includes a collection device 100, a box 4 and a battery module 5, wherein the box 4 is the outer shell of the entire power battery 200 system, and is provided with a accommodating compartment 6 inside for placing the battery module 5 to protect and fix it. The collection device 100 is arranged on a side frame of the box 4, and the battery module 5 is the energy storage unit of the power battery 200. A socket assembly 7 is provided on the side of the battery module 5 close to the collection device 100. The collection device 100 needs to be pre-installed in the box 4 before installing the battery module, and then the battery module 5 is installed so that the socket assembly 7 on the battery module 5 is aligned with the plug-in component 3 of the collection device 100 and directly inserted, thereby realizing connection with the battery module 5. The collection device 100 is connected to the battery module 5 by plugging, which simplifies the assembly process, improves the production efficiency of the power battery 200, and reduces the production cost.

[0037] Furthermore, the socket assembly 7 is composed of a socket body 70 and a guide portion 71, wherein the socket body 70 is a metal part directly connected to the battery module 5, and the guide portion 71 is arranged at the bottom of the socket body 70, and a plug-in groove 72 is provided at one end thereof close to the guide portion 71. The shape of the plug-in groove 72 corresponds to the plug-in column 310 on the collection device 100, and is used to accommodate the plug-in column 310, ensuring that the two can be accurately docked and form a reliable connection. The guide portion 71 is used to guide the plastic part 103 of the plug mounted on the connecting column 311 to be smoothly inserted, ensuring that the plug-in column 310 of the collection device 100 can accurately enter the plug-in groove 72, making the plugging operation more convenient and efficient, and improving the reliability of the connection.

[0038] Reference Figure 7-Figure 9 In one embodiment, the power battery 200 further includes an explosion-proof valve 8, and an exhaust channel 9 is further provided in the box body 4. The exhaust channel 9 includes a first exhaust channel 90 and a second exhaust channel 91. The accommodating chamber 6, the first exhaust channel 90 and the second exhaust channel 91 are connected in sequence, and the explosion-proof valve 8 is provided on the box body 4 and connected to the second exhaust channel 91.

[0039] In the above embodiment, the power battery 200 includes an explosion-proof valve 8, which is a key safety component installed on the box body 4. Its function is to automatically open when the pressure exceeds the set value to release the internal gas to prevent the box body 4 from exploding or being damaged due to overpressure. An exhaust channel 9 is also provided in the box body 4. The bottom of the battery module 5 is designed with a directional eruption structure. The directional eruption structure is preferably formed with an opening or through-hole on the side where the battery module 5 contacts the bottom plate 15 of the box body 4. The remaining sides of the bottom of the battery module 5 are in a sealed state. In the event of thermal runaway, the high-temperature gas and material can be guided to erupt in a specific direction to avoid damage to other components. Among them, the exhaust channel 9 is provided inside the bottom plate 15 of the box body 4, that is, on the bottom plate 15 of the box body 4. The interior is formed into a cavity structure by stamping or injection molding. The exhaust channel 9 consists of a first exhaust channel 90 and a second exhaust channel 91, which is used to discharge the gas in the storage chamber 6 to the external environment. The storage chamber 6 is a space in the box body 4 for placing the battery module 5. When the battery module 5 is placed in the storage chamber 6 of the box body 4, the battery module 5 contacts the side of the bottom plate 15 of the box body 4 with an opening or through hole and is connected to the first exhaust channel 90. The first exhaust channel 90 is then connected to the second exhaust channel 91, and the second exhaust channel 91 is finally connected to the outside world through the explosion-proof valve 8. The step-by-step connection design ensures the orderly discharge of gas in the event of thermal runaway, reduces the impact of thermal runaway on surrounding components, and improves the overall reliability of the system.

[0040] Reference Figure 7-10 In one embodiment, the first exhaust channel 90 includes a first exhaust hole 901 and a second exhaust hole 902. The first exhaust hole 901 and the second exhaust hole 902 are respectively multiple and arranged at intervals, and the first exhaust hole 901 and the second exhaust hole 902 are staggered.

[0041] In the above embodiment, the first exhaust channel 90 is composed of a first exhaust hole 901 and a second exhaust hole 902, and the bottom plate 15 of the box body 4 is composed of an upper bottom plate 150 and a lower bottom plate 151. A certain gap is formed between the upper bottom plate 150 and the lower bottom plate 151, and the gap is also the second exhaust channel 91. The first exhaust hole 901 and the second exhaust hole 902 are respectively arranged on the upper bottom plate 150, wherein the first exhaust hole 901 and the second exhaust hole 902 are both multiple and arranged in an array along the length or width direction of the box body 4 to form an exhaust structure arranged at intervals, and the first exhaust hole 901 and the second exhaust hole 902 are staggered, that is, one of the exhaust holes in the second exhaust hole 902 is relatively arranged between two adjacent exhaust holes in the first exhaust hole 901. Through the synergistic effect of multiple exhaust holes, the pressure of the gas flow can be effectively dispersed to avoid the problem of blockage or failure of a single exhaust hole due to overload, and the staggered arrangement increases the effective area of ​​the exhaust channel 9, thereby improving the gas exhaust efficiency.

[0042] Reference Figure 7-10 In one embodiment, the power battery 200 further includes a protective film 12 , which is disposed in the accommodating chamber 6 , and the protective film 12 is located between the battery module 5 and the first exhaust channel 90 .

[0043] In the above embodiment, the power battery 200 also includes a protective film 12, which is a PET (Polyethylene Terephthalate) film. The protective film 12 is arranged in the accommodating chamber 6 and is located between the battery module 5 and the first exhaust channel 90, that is, the protective film 12 is placed on the upper base plate 150, playing a key isolation role. The gases and substances generated by thermal runaway of the battery cell need to melt through the protective film 12 on the surface of the first exhaust channel 90 before entering the second exhaust channel 91 in the box body 4. It can effectively prevent the heat and substances generated when a single battery cell thermally runs away from spreading to other battery cell modules through the exhaust channel 9, thereby improving the safety of the entire battery system.

[0044] Reference Figure 7 In one embodiment, the power battery 200 further includes a liquid cooling box cover 13 and a heat conducting portion 14, wherein the heat conducting portion 14 is arranged on the battery module 5, and the liquid cooling box cover 13 is arranged on a side of the heat conducting portion 14 away from the battery module 5, and the liquid cooling box cover 13 is connected to the box body 4.

[0045] In the above embodiment, the power battery 200 also includes a liquid cooling box cover 13 and a heat conducting part 14. The heat conducting part 14 is arranged on the battery module 5. The heat conducting part 14 is preferably arranged on the top of the battery module 5 away from the bottom plate 15 of the box body 4, so that the heat conducting part 14 can contact the battery module 5 with a larger area, so that the heat conducting part 14 can efficiently conduct the heat generated by the battery module 5. The liquid cooling box cover 13 is located on the side of the heat conducting part 14 away from the battery module 5 and is fixed to the box body 4 through a connecting device. The heat conducting part 14 is sandwiched between the battery module 5 and the liquid cooling box cover 13, and is in close contact with the battery module 5 and the liquid cooling box cover 13 respectively, forming a tight three-layer structure. The battery module 5 is located in the innermost layer and directly generates heat. The heat conducting part 14 is located in the middle layer and is responsible for efficiently conducting heat. The liquid cooling box cover 13 is located in the outermost layer and serves as an interface for the cooling system to dissipate heat, thereby realizing efficient heat transfer from the battery module 5 to the liquid cooling system.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A collection device, used to be connected to a battery module, characterized in that: It includes a collection shell, a collection component and a plurality of plug-in components; The collection housing includes a first protective shell and a second protective shell, wherein the second protective shell covers the first protective shell to form a receiving cavity; The collecting component includes a collecting body located in the accommodating cavity. The plug-in component is provided on the first protective shell, and the plug-in component is respectively connected to the collecting body and the battery module.

2. The collection device according to claim 1, characterized in that: The first protective shell includes a first protective body, the plug-in component includes a connecting plate and a plug-in body, the first protective body is provided with an accommodating protrusion, the connecting plate is arranged in the accommodating protrusion, and the plug-in body is connected to the connecting plate and passes through the accommodating protrusion.

3. The collection device according to claim 2, characterized in that: The first protective shell also includes a second protective body arranged on the first protective body, the collecting component also includes a collecting connection line connected to the collecting body, a limiting groove is provided on the side of the second protective body, and a limiting plate corresponding to the limiting groove is provided on the side of the second protective shell, and the limiting plate is provided in the limiting groove to form a limiting hole for the collecting connection line to pass through.

4. The collection device according to claim 2, characterized in that: The plug-in body includes a plug-in column and a connecting column, the connecting column is arranged on the connecting plate, the plug-in column is arranged at one end of the connecting column away from the connecting plate, and the circumference of one end surface of the plug-in column close to the connecting column is greater than the circumference of one end surface of the plug-in column away from the connecting column.

5. The collection device according to claim 4, characterized in that: The plug-in column is provided with at least two notches recessed toward the connecting column, and the two notches are arranged opposite to each other.

6. The collection device according to claim 4, characterized in that: The first protective shell is further provided with a plug plastic part, which is sleeved on the connecting column and connected to the accommodating protrusion.

7. The collection device according to claim 3, characterized in that: The collection body includes a sampling plate and a plurality of sampling strips. The sampling plate is connected to the collection connection line. One end of the sampling strip is connected to the sampling plate, and the other end of the sampling strip away from the sampling plate is connected to the connecting plate.

8. A power battery comprising the collection device according to any one of claims 1 to 7, characterized in that: It also includes a box body and a battery module. The box body is provided with a storage compartment for placing the battery module. A socket assembly is provided on the side of the battery module close to the collection device. The collection device is connected to the battery module by plugging it into the socket assembly through a plug-in component.

9. The power battery according to claim 8, characterized in that: The socket assembly includes a socket body and a guide portion. The socket body is connected to the battery module. The guide portion is arranged at the bottom of the socket body, and a plug groove is arranged at one end of the socket body close to the guide portion.

10. The power battery according to claim 8, characterized in that: The power battery also includes an explosion-proof valve. An exhaust channel is also provided in the box body. The exhaust channel includes a first exhaust channel and a second exhaust channel. The storage chamber, the first exhaust channel and the second exhaust channel are connected in sequence. The explosion-proof valve is provided on the box body and is connected to the second exhaust channel.

11. The power battery according to claim 10, characterized in that: The first exhaust channel includes a first exhaust hole and a second exhaust hole. The first exhaust hole and the second exhaust hole are respectively in plurality and arranged at intervals. The first exhaust hole and the second exhaust hole are staggered.

12. The power battery according to claim 10, characterized in that: The power battery further includes a protective film, which is disposed in the accommodation compartment and located between the battery module and the first exhaust channel.

13. The power battery according to claim 8, characterized in that: The power battery further includes a liquid cooling box cover and a heat conducting part. The heat conducting part is arranged on the battery module. The liquid cooling box cover is arranged on a side of the heat conducting part away from the battery module, and the liquid cooling box cover is connected to the box body.

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