Battery temperature sampling system, battery pack and power consumption device

Abstract

The utility model discloses a battery temperature sampling system, a battery pack and an electric device. The battery temperature sampling system comprises: a temperature detection component (7), comprising a first base (71) for connecting a battery (6), a temperature sensing component (72) mounted on the first base (71) and a first electrical connector (73) mounted on the first base (71) and connected to the temperature sensing component (72) by signal; a signal transmission component (3), comprising a second base (31) pluggably connected to the first base (71) and a second electrical connector (32) mounted on the second base (31), wherein the second electrical connector (32) is configured to abut against the first electrical connector (73) when the first base (71) and the second base (31) are plugged together, and to be separated from the first electrical connector (73) when the first base (71) and the second base (31) are separated.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery temperature sampling system, a battery pack and an electrical device. Background Art

[0002] In the field of battery packs, in order to monitor the operating temperature of the battery cells in the battery pack to avoid thermal runaway of the battery pack, it is necessary to sample the temperature of the battery cells in the battery pack. However, at the same time, considering that each component in the sampling system may be damaged, once one of the components is damaged, the entire system will be disassembled and even the entire battery module will be scrapped, which leads to excessively high after-sales maintenance costs for the battery pack. Utility Model Content

[0003] The utility model aims to provide a battery temperature sampling system, a battery pack and an electric device, and solves the problem that the maintenance and repair cost of the battery pack is very high.

[0004] According to one aspect of an embodiment of the utility model, the utility model provides a battery temperature sampling system, which includes: a temperature detection component, including a first base for connecting a battery, a temperature sensing component installed on the first base, and a first electrical connector installed on the first base and connected to the temperature sensing component signal; a signal transmission component, including a second base pluggably connected to the first base and a second electrical connector installed on the second base, the second electrical connector is configured to abut against the first electrical connector when the first base and the second base are plugged in, and to be separated from the first electrical connector when the first base and the second base are separated, one of the first base and the second base is provided with a magnetic component, and the other is provided with a magnetic attraction component that can be attracted to the magnetic component.

[0005] In some embodiments, a first plug-in structure is provided at one end of the first base adjacent to the second base, and a second plug-in structure that plugs into and cooperates with the first plug-in structure is provided at one end of the second base adjacent to the first base. One of the first plug-in structure and the second plug-in structure is an embedding groove, and the other is an embedded portion that matches the cross-section of the embedding groove.

[0006] In some embodiments, the embedded portion is a portion of the first base or the second base along the depth direction of the embedding groove; or the embedded portion is a protrusion provided on the first base or the second base and adapted to the embedding groove.

[0007] In some embodiments, the cross-section of the embedding groove is a polygonal structure to prevent the first base and the second base from rotating together.

[0008] In some embodiments, the first electrical connector is embedded in a surface of the first plug-in structure facing the second plug-in structure; the second electrical connector is embedded in a surface of the second plug-in structure facing the first plug-in structure.

[0009] In some embodiments, one of the first plug-in structure and the second plug-in structure includes a groove, and the other includes a boss matched with the groove, and the depth direction of the groove is consistent with the depth direction of the embedding groove.

[0010] In some embodiments, the first plug-in structure includes a belay groove and a groove, and the groove is arranged at the bottom of the belay groove.

[0011] In some embodiments, one of the first electrical connector and the second electrical connector is embedded in the bottom surface of the groove, and the other is embedded in the end surface of the boss facing the bottom surface of the groove.

[0012] In some embodiments, the battery temperature sampling system further includes a sheet-shaped bearing component, the bearing component is provided with a mounting hole, and the temperature detection component is installed in the mounting hole and fixedly connected to the bearing component.

[0013] In some embodiments, the temperature sensing member is in contact with the battery, and the first base and the temperature sensing member are arranged along the depth direction of the mounting hole and are located on a side of the temperature sensing member away from the battery.

[0014] In some embodiments, the signal transmission component is disposed in the mounting hole and is located at an end of the temperature detection component away from the battery along the depth direction of the mounting hole.

[0015] In some embodiments, the battery temperature sampling system further includes a sampling signal line connected to the second electrical connector of the signal transmission component, and the sampling signal line is laid on a side of the supporting component away from the battery.

[0016] In some embodiments, the battery temperature sampling system includes multiple temperature detection components, multiple signal transmission components arranged in a one-to-one correspondence with the multiple temperature detection components, and multiple sampling signal lines corresponding one-to-one with the multiple signal transmission components; the battery temperature sampling system also includes a connector, and the connector includes input terminals corresponding one-to-one with the multiple sampling signal lines.

[0017] In some embodiments, the output end of the connector is a pluggable connection structure.

[0018] According to another aspect of the utility model, a battery pack is also provided, which includes the above-mentioned battery temperature collection device and multiple batteries, the support component cover is arranged at one end of the multiple batteries provided with electrodes, the battery pack also includes a connecting piece connecting adjacent batteries, and the battery temperature collection device does not protrude from the connecting piece or the electrode.

[0019] According to another aspect of the present invention, a battery pack is further provided, and the battery pack includes the above-mentioned battery temperature sampling system.

[0020] According to another aspect of the present invention, an electric device is provided, and the electric device includes the above-mentioned battery pack.

[0021] By applying the technical solution of the present invention, the temperature detection component is fixed relative to the battery, and the signal transmission component is detachably connected to the temperature detection component. After the signal transmission component and its downstream components (such as the sampling signal line and the connector) are damaged, there is no need for the temperature detection component, and there is no need to affect or damage the battery. Only the components downstream of the signal transmission component need to be disassembled. Therefore, the problem of high maintenance cost after the sampling system is damaged in the related art is improved.

[0022] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 A schematic structural diagram of an electric device disclosed in some embodiments of the utility model is shown.

[0025] Figure 2 A schematic diagram of the exploded structure of a battery pack disclosed in some embodiments of the utility model is shown.

[0026] Figure 3 A schematic structural diagram of a battery cell disclosed in some embodiments of the utility model is shown.

[0027] Figure 4 A schematic structural diagram of a battery module disclosed in some embodiments of the utility model is shown.

[0028] Figure 5 A schematic structural diagram of a bearing component on the top of a battery module disclosed in some embodiments of the utility model is shown.

[0029] Figure 6 A structural schematic diagram of the back side of a top bearing component of a battery module disclosed in some embodiments of the present utility model is shown.

[0030] Figure 7 A schematic diagram of the exploded structure of a battery module disclosed in some embodiments of the utility model is shown.

[0031] Figure 8 A three-dimensional structural schematic diagram of a battery temperature sampling system disclosed in some embodiments of the utility model is shown.

[0032] Fig. 9 A three-dimensional structural schematic diagram from another angle of a battery temperature sampling system disclosed in some embodiments of the utility model is shown.

[0033] Fig.10 A structural schematic diagram of a first state of a temperature detection component and a signal transmission component of a battery temperature sampling system disclosed in some embodiments of the present utility model is shown.

[0034] Fig.11 A structural schematic diagram of a second state of a temperature detection component and a signal transmission component of a battery temperature sampling system disclosed in some embodiments of the present utility model is shown.

[0035] Fig.12 A structural schematic diagram of a third state of a temperature detection component and a signal transmission component of a battery temperature sampling system disclosed in some embodiments of the present utility model is shown.

[0036] Fig.13 A schematic structural diagram of a second base and a sealant of a battery temperature sampling system disclosed in some embodiments of the utility model is shown.

[0037] Fig.14 A structural schematic diagram of one side of a second base of a battery temperature sampling system disclosed in some embodiments of the utility model is shown.

[0038] Fig.15 A structural schematic diagram of the other side of a second base of a battery temperature sampling system disclosed in some embodiments of the utility model is shown.

[0039] Fig.16 A schematic cross-sectional structure diagram of a temperature detection component and a signal transmission component of a battery temperature sampling system disclosed in some embodiments of the utility model is shown.

[0040] In the figure:

[0041] 1000, vehicle; 100, battery pack; 110, housing; 111, first part; 112, second part; 120, battery cell; 121, end cap; 121a, electrode terminal; 122, housing; 123, battery cell assembly; 123a, pole ear; 200, controller; 300, motor; 1, sampling signal line; 2, connector; 3, signal transmission component; 31, second base; 32, second electrical connector; 33, magnetic member; 34, boss; 35, mounting groove; 36, connecting part; 37, sealant; 4, bearing component; 41, mounting hole; 5, connecting piece; 6, battery; 61, electrode; 7, temperature detection component; 71, first base; 72, temperature sensing member; 73, first electrical connector; 74, magnetic member; 75, embedded groove; 76, groove. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by technicians in the technical field to which the present invention belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" in the specification and claims of the present invention and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0044] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] In the description of the present utility model, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present utility model and simplifying the description, and do 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 a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0046] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the utility model. In the description of the utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0047] If there is no special explanation, the "include" and "comprising" mentioned in the present invention may be open or closed. For example, the "include" and "comprising" may mean that other components not listed may also be included or only the listed components may be included or only the listed components may be included.

[0048] If not specifically stated, in the present invention, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0049] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0050] Figure 1 FIG. 1 shows a schematic diagram of a structure of an electric device using a battery as a power source; Figure 1As shown, the power-consuming device of this embodiment includes a vehicle 1000, which may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery pack 100 is disposed inside the vehicle 1000, and the battery pack 100 may be disposed at the bottom, head, or tail of the vehicle 1000. The battery pack 100 may be used to power the vehicle 1000, for example, the battery pack 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery pack 100 to power the motor 300, for example, for the starting, navigation, and working power requirements of the vehicle 1000 during driving.

[0051] In some embodiments of the present invention, the battery pack 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0052] Please refer to Figure 2 , Figure 2 An exploded view of a battery pack 100 provided for some embodiments of the utility model. The battery pack 100 includes a case 110 and a battery module disposed in the case 110, the battery module includes a plurality of battery cells 120, and the battery cells 120 are accommodated in the case 110. Among them, the case 110 is used to provide a storage space for the battery cells 120, and the case 110 can adopt a variety of structures. In some embodiments, the case 110 may include a first portion 111 and a second portion 112, the first portion 111 and the second portion 112 cover each other, and the first portion 111 and the second portion 112 jointly define a storage space for accommodating the battery cells 120. The second part 112 may be a hollow structure with one end open, and the first part 111 may be a plate-like structure, and the first part 111 covers the open side of the second part 112, so that the first part 111 and the second part 112 jointly define a storage space; the first part 111 and the second part 112 may also be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box body 110 formed by the first part 111 and the second part 112 may be in various shapes, such as a cylinder, a cuboid, etc.

[0053] In the battery pack 100, there may be multiple battery cells 120, and the multiple battery cells 120 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 120 are both connected in series and in parallel. The multiple battery cells 120 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 120 is accommodated in the box 110; of course, the battery pack 100 may also be a battery module formed by connecting multiple battery cells 120 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 110. The battery pack 100 may also include other structures, for example, the battery pack 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 120.

[0054] Each battery cell 120 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 120 may be cylindrical, flat, rectangular, or in other shapes.

[0055] Please refer to Figure 3 , Figure 3 The schematic diagram of the exploded structure of the battery cell 120 provided in some embodiments of the present invention. The battery cell 120 refers to the smallest unit constituting the battery pack 100. Figure 3 The battery cell 120 includes an end cover 121, a shell 122, a battery cell assembly 123 and other functional components.

[0056] The end cap 121 refers to a component that covers the opening of the shell 122 to isolate the internal environment of the battery cell 120 from the external environment. Without limitation, the shape of the end cap 121 can be adapted to the shape of the shell 122 to match the shell 122. Optionally, the end cap 121 can be made of a material with a certain hardness and strength, such as an aluminum alloy, so that the end cap 121 is not easily deformed when squeezed and collided, so that the battery cell 120 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 121a can be provided on the end cap 121. The electrode terminal 121a can be used to electrically connect to the battery cell assembly 123 for outputting or inputting electrical energy of the battery cell 120. In some embodiments, the end cap 121 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 120 reaches a threshold. The material of the end cap 121 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the utility model does not impose any special restrictions on this. In some embodiments, an insulating member can also be provided on the inner side of the end cap 121, and the insulating member can be used to isolate the electrical connection components in the housing 122 from the end cap 121 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0057] The shell 122 is a component used to cooperate with the end cap 121 to form the internal environment of the battery cell 120, wherein the formed internal environment can be used to accommodate the battery cell assembly 123, electrolyte and other components. The shell 122 and the end cap 121 can be independent components, and an opening can be set on the shell 122, and the internal environment of the battery cell 120 is formed by covering the opening with the end cap 121 at the opening. Without limitation, the end cap 121 and the shell 122 can also be integrated. Specifically, the end cap 121 and the shell 122 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 122, the end cap 121 covers the shell 122. The shell 122 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 122 can be determined according to the specific shape and size of the battery cell assembly 123. The shell 122 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present invention does not impose any special limitation on this.

[0058] The cell assembly 123 is a component where electrochemical reactions occur in the battery cell 120. The housing 122 may contain one or more cell assemblies 123. The cell assembly 123 is mainly formed by winding or stacking pole sheets, wherein the pole sheets include a positive pole sheet and a negative pole sheet, and a separator is usually provided between the positive pole sheet and the negative pole sheet.

[0059] The electrode sheet mainly includes a thin sheet-shaped current collector and an active material coated on the current collector. The parts of the positive electrode sheet (cathode electrode sheet) and the negative electrode sheet (anode electrode sheet) with active materials constitute the main body of the battery cell assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the tab 123a. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery pack 100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab 123a connects the electrode terminal to form a current loop.

[0060] Each component in the sampling system may be damaged. In the sampling system, each component is usually electrically connected by a fixed connection (such as welding). Even the temperature detection component is connected to the battery module by a fixed connection (such as welding). Therefore, if one of the components is damaged, the entire sampling system needs to be disassembled or the entire battery module needs to be scrapped. Therefore, the maintenance and repair costs of the battery pack are very high.

[0061] To improve the above problems, see Figures 4 to 9 As shown, the battery temperature sampling system of this embodiment includes a temperature detection component 7 , a signal transmission component 3 , a sampling signal line 1 and a connector 2 .

[0062] In this embodiment, the temperature detection component 7 includes a first base 71 for connecting to the battery 6 , a temperature sensing element 72 mounted on the first base 71 , and a first electrical connection element 73 mounted on the first base 71 and connected to the temperature sensing element 72 for signal connection.

[0063] The signal transmission component 3 includes a second base 31 pluggably connected to the first base 71 and a second electrical connector 32 installed on the second base 31. The second electrical connector 32 is configured to abut against the first electrical connector 73 when the first base 71 and the second base 31 are plugged in and to be separated from the first electrical connector 73 when the first base 71 and the second base 31 are separated.

[0064] The temperature detection component 7 is fixed relative to the battery 6, and the signal transmission component 3 is detachably connected to the temperature detection component 7. After the signal transmission component 3 and its downstream components (such as the sampling signal line 1 and the connector 2) are damaged, there is no need to remove the temperature detection component 7, nor to affect or damage the battery 6. Only the components downstream of the signal transmission component 3 need to be removed. Therefore, the problem of high maintenance cost after the sampling system is damaged in the related art is improved.

[0065] In this embodiment, the battery 6 is the above-mentioned battery monomer. In other embodiments, the battery 6 is also a battery module composed of a plurality of battery monomers.

[0066] In some embodiments, one of the first base 71 and the second base 31 is provided with a magnetic member 74, and the other is provided with a magnetic member 33 that can attract the magnetic member 74. The magnetic member 33 and the magnetic member 74 are attracted to each other to achieve relative fixation of the temperature detection component 7 and the signal transmission component 3, which is conducive to the effective transmission of the signal, and the temperature detection component 7 and the signal transmission component 3 are easy to disassemble and simple to connect.

[0067] In some embodiments, one of the magnetic member 74 and the magnetic member 33 is a magnet, and the other is a steel material. In other embodiments, both the magnetic member 74 and the magnetic member 33 are magnets.

[0068] See also Figures 10 to 12 as well as Fig.16 A first plug-in structure is provided at one end of the first base 71 adjacent to the second base 31, and a second plug-in structure that is plugged into and matched with the first plug-in structure is provided at one end of the second base 31 adjacent to the first base 71. One of the first plug-in structure and the second plug-in structure is an embedding groove 75, and the other is an embedded portion that is adapted to the cross-section of the embedding groove 75.

[0069] When connecting the signal transmission component 3 with the temperature detection component 7, the embedded part is inserted into the embedding groove 75 to realize the electrical connection between the first electrical connection component 73 and the second electrical connection component 32. The magnetic component 74 and the magnetic attraction component 33 attract each other to keep the signal transmission component 3 and the temperature detection component 7 in a relatively fixed state. If the signal transmission component 3 needs to be separated from the temperature detection component 7, the signal transmission component 3 can be separated from the temperature detection component 7 by directly pulling the signal transmission component 3 to overcome the attraction of the magnetic component 74 and the magnetic attraction component 33. The temperature detection component 7 and the signal transmission component 3 are easy to disassemble and simple to connect.

[0070] In this embodiment, the embedding groove 75 is provided on the first base 71, and the embedding portion is provided on the second base 31. In other embodiments, the embedding groove is provided on the second base 31, and the embedding portion is provided on the first base 71.

[0071] In some embodiments, the embedded portion is a portion of the first base 71 or the second base 31 along the depth direction of the embedding groove 75 .

[0072] In this embodiment, the embedding portion is provided on the second base 31, the embedding groove 75 is provided on the first base 71, the cross section of the second base 31 perpendicular to the depth direction of the embedding groove 75 is the same shape and size as the cross section of the embedding groove 75, and a portion of the second base 31 along the depth direction of the embedding groove 75 is inserted into the embedding groove 75. A portion of the second base 31 itself is used as the embedding portion, which has the advantages of simple and compact structure, and the second base 31 is easy to process and manufacture, and the cost is low.

[0073] In other embodiments, the embedding portion is provided on the first base 71, the embedding groove is provided on the second base 31, the cross section of the first base perpendicular to the depth direction of the embedding groove is the same shape as the cross section of the embedding groove and the size is adapted, and a portion of the first base 71 along the depth direction of the embedding groove is inserted into the embedding groove. A portion of the first base 71 itself is used as the embedding portion, which has the advantages of simple and compact structure, and the first base 71 is easy to process and manufacture, and the cost is low.

[0074] In other embodiments, the embedded portion is a protrusion provided on the first base 71 or the second base 31 and adapted to the embedded groove. One of the first base 71 and the second base 31 is provided with an embedded groove 75, and the other is provided with a protrusion adapted to the embedded groove 75. When the signal transmission component 3 is connected to the temperature detection component 7, the embedded portion is inserted into the embedded groove 75 to achieve electrical connection between the first electrical connector 73 and the second electrical connector 32. If the signal transmission component 3 needs to be separated from the temperature detection component 7, the signal transmission component 3 can be separated from the temperature detection component 7 by directly pulling the signal transmission component 3. The temperature detection component 7 and the signal transmission component 3 are easy to disassemble and simple to connect.

[0075] In this embodiment, the cross section of the embedding groove 75 is a polygonal structure, so that the first base 71 and the second base 31 can be locked and matched. Figures 10 to 12 The first base 71 and the second base 31 are anti-rotationally matched to prevent the two from rotating relative to each other so as to separate the first electrical connector 73 and the second electrical connector 32. Furthermore, inserting the embedded portion into the embedding groove 75 can simultaneously achieve the docking of the first electrical connector 73 and the second electrical connector 32, which is conducive to aligning the two and simplifying the plug-in process.

[0076] In this embodiment, the first electrical connector 73 is embedded in the surface of the first plug-in structure facing the second plug-in structure; the second electrical connector 32 is embedded in the surface of the second plug-in structure facing the first plug-in structure. After the first plug-in structure and the second plug-in structure are plugged in, they can be docked with each other, which is easy to operate and has a simple structure.

[0077] Furthermore, the first electrical connector 73 and the second electrical connector 32 are arranged opposite to each other so that the magnetic force between the magnetic attraction member 33 and the magnetic member 74 presses against each other, which is beneficial to ensure the reliability of the contact between the two and smoothly transmit the temperature signal.

[0078] See also Figures 10 to 12 One of the first plug-in structure and the second plug-in structure includes a groove 76, and the other includes a boss 34 adapted to the groove 76. The depth direction of the groove 76 is consistent with the depth direction of the embedding groove 75. Further, the first plug-in structure and the second plug-in structure are further positioned to prevent the first base 71 and the second base 31 from moving relative to each other, thereby preventing the first electrical connector 73 and the second electrical connector 32 from being separated.

[0079] In this embodiment, the first plug-in structure includes the embedding groove 75 and the groove 76. The groove 76 is arranged at the bottom of the embedding groove 75. The first plug-in structure mainly consists of two layers of grooves, which facilitates the casting of the first base 71 and ensures dimensional accuracy.

[0080] In some embodiments, one of the first electrical connector 73 and the second electrical connector 32 is embedded in the bottom surface of the groove 76 , and the other is embedded in the end surface of the boss 34 facing the bottom surface of the groove 76 .

[0081] The first electrical connector 73 and the second electrical connector 32 are positioned by two layers of positioning structures, one layer is composed of the embedding groove 75 and the positioning part, and the other layer is composed of the groove 76 and the boss 34, which further ensures the reliability and stability of the docking of the first electrical connector 73 and the second electrical connector 32.

[0082] See also Figures 10 to 11 as well as Figures 13 to 15A mounting groove 35 is provided on the end surface of the second base 31 of the signal transmission component 3 at one end away from the temperature detection component 7, and the second electrical connector 32 extends from the side of the second base 31 facing the temperature detection component 7 into the mounting groove 35, and is electrically connected to the sampling signal line 1 in the mounting groove 35. The mounting groove 35 is filled with an insulating sealant 37, which can protect the charged body from the influence of the external environment and avoid the external stress directly acting on the conductive metal body.

[0083] The connecting portion 36 of the second electrical connector 32 located in the mounting groove 35 is connected to the sampling signal line 1 , and the connection method includes one of laser welding, soldering, and resistance welding.

[0084] Furthermore, there are two second electrical connectors 32, the mounting slots 35 are arranged one-to-one correspondingly, the sampling signal line 1 is arranged one-to-one correspondingly with the second electrical connector 32, and the second electrical connector 32 is connected to the corresponding sampling signal line 1 in the corresponding mounting slot 35. An insulating isolation wall is provided between the two mounting slots 35.

[0085] The battery temperature sampling system also includes a sheet-shaped supporting component 4, which is provided with a mounting hole 41. The temperature detection component 7 is installed in the mounting hole 41 and is fixedly connected to the supporting component 4. The supporting component 4 can stably maintain the temperature detection component 7 in a relatively fixed state relative to the battery 6, so that the temperature detection component 7 can stably collect the temperature of the battery 6.

[0086] In some embodiments, the temperature sensing member 72 is in contact with the battery 6, and the first base 71 and the temperature sensing member 72 are arranged along the depth direction of the mounting hole 41 and are located on the side of the temperature sensing member 72 away from the battery 6, so that the temperature sensing member 72 is in contact with the battery 6 to directly detect the temperature of the battery 6, which is conducive to ensuring the authenticity of the collected temperature information. The first base 71 is arranged on the outside of the temperature sensing member 72, which is easy to connect and disassemble with the signal transmission component 3, which is conducive to reducing the difficulty of maintaining the battery pack.

[0087] In some embodiments, the signal transmission component 3 is disposed in the mounting hole 41 and is located at the end of the temperature detection component 7 away from the battery 6 along the depth direction of the mounting hole 41. The signal transmission component 3 is disposed on the outside of the temperature detection component 7, which is easy to connect and disassemble with the signal transmission component 3, which is beneficial to reducing the difficulty of maintenance of the battery pack.

[0088] In some embodiments, a sampling signal line 1 connected to the second electrical connector 32 of the signal transmission component 3 is also included. The sampling signal line 1 is laid on a side of the carrier component 4 away from the battery 6. The sampling signal line 1 is arranged on the outside of the carrier component 4 to isolate the sampling signal line 1 from the battery 6 to prevent the temperature of the sampling signal line 1 from being too high.

[0089] In this embodiment, the battery temperature sampling system includes a plurality of temperature detection components 7, a plurality of signal transmission components 3 corresponding to the plurality of temperature detection components 7, and a plurality of sampling signal lines 1 corresponding to the plurality of signal transmission components 3; the battery temperature sampling system also includes a connector 2, and the connector 2 includes input terminals corresponding to the plurality of sampling signal lines 1. The sampling system integrates the plurality of temperature detection components 7 and the signal transmission components 3 and sampling signal lines 1 connected thereto, which is beneficial to subsequent maintenance.

[0090] In some embodiments, the output end of the connector 2 is a pluggable connection structure, which is conducive to the modularization of the sampling system and can simplify the disassembly process during maintenance.

[0091] See also Figures 4 to 7 The battery pack includes the battery temperature collection device and a plurality of batteries 6 arranged side by side. The bearing component 4 is covered at one end of the plurality of batteries 6 provided with electrodes 61. The battery pack also includes a connecting piece 5 connecting adjacent batteries 6. The battery temperature collection device does not protrude from the connecting piece 5 or the electrode 61. The battery temperature collection device of this embodiment utilizes the height space occupied by the electrode 61 and the connecting piece 5, and effectively reduces the height of the battery for the square battery 6.

[0092] The bearing member 4 is provided with a mounting hole 41 for accommodating the temperature detection member 7. The temperature detection member 7 is mounted in the mounting hole 41 and fixedly connected to the bearing member 4. The temperature sensing member 72 abuts against the battery 6. The first base 71 and the temperature sensing member 72 are arranged along the depth direction of the mounting hole 41 and are located on the side of the temperature sensing member 72 away from the battery 6. The temperature detection member 7 is mounted in the thickness direction of the bearing member 4, which is conducive to solving the space problem and reducing the volume of the battery 6.

[0093] In some embodiments, the signal transmission component 3 is disposed in the mounting hole 41 and connected to the temperature detection component 7. The temperature detection component 7 is installed in the thickness direction of the bearing component 4, which is conducive to solving the space problem and reducing the volume of the battery 6.

[0094] See also Figures 4 to 7 In the technical solution of the utility model, the battery module of the battery pack includes a battery temperature sampling system, a carrying component 4, and a connecting piece 5. Among them, the sampling signal line 1, the connector 2, the signal transmission component 3, the carrying component 4, and the temperature detection component 7 constitute a battery temperature sampling system that can collect the temperature information of the battery.

[0095] Further integration Figures 10 to 12 One end of the sampling signal line 1 is connected to the connector 2, and the other end is connected to the second electrical connector 32 of the signal transmission component 3. The signal transmission component 3, as an intermediate carrier of signal transmission, can be applied to the sampling requirements of batteries in different positions or different sizes.

[0096] Further integration Figures 13 to 16 The signal transmission component 3 is formed by an insert injection molding process, integrating a second base 31 that performs bearing, insulation and structural limiting functions, a magnetic attraction component 33 that performs a guiding function, a second electrical connector 32 that performs signal transmission, and a sealant 37 that covers the welding point between the second electrical connector 32 and the sampling signal line 1.

[0097] Two mounting grooves 35 are provided on one side of the second base 31 facing away from the temperature detection component 7, and an insulating isolation wall is provided between the two mounting grooves 35. The two mounting grooves 35 are used to respectively accommodate the welding points of the two second electrical connectors 32 and the sampling signal line 1, the metal material connection part 36 of the second electrical connector 32 located in the mounting groove 35, and the wire core of the sampling signal line 1 and other charged bodies.

[0098] The mounting groove 35 is filled with a sealant 37. The sealant 37 is filled in the mounting groove 35 and covers the charged body, which is beneficial to the protection of the solder joints and avoids the external stress from directly acting on the solder joints or the charged body. On the other hand, it can also play an insulating packaging role and effectively avoid short circuit or external water vapor intrusion.

[0099] The insulating isolation wall between the two mounting grooves 35 is helpful to prevent a short circuit between the two second electrical connectors 32 located in the two mounting grooves 35 , which are respectively positive and negative electrodes.

[0100] The signal transmission component 3 is provided with a plurality of magnetic elements 33 on one side facing the temperature detection component 7. The end surface of the second base 31 facing the temperature detection component 7 is a polygon, and the plurality of magnetic elements 33 are respectively provided at the plurality of corners of the polygon. The plurality of magnetic elements 33 have the same polarity.

[0101] The end surface of the second base 31 facing the temperature detection component 7 is also provided with a boss 34, the end surface of the second electrical connector 32 is opposite to the surface of the boss 34, and the first electrical connector 73 protrudes outward from the surface of the first base 71 against the boss 34 to abut against the end surface of the second electrical connector 32. The second electrical connector 32 recessed toward the inner side of the boss 34 not only realizes signal contact with the temperature detection component 7, but also forms protection for it by utilizing the height difference to avoid the risk of wear.

[0102] The carrier component 4 is used to integrate the sampling signal line 1, the connecting piece 5, and the three connectors 2 of the signal transmission component.

[0103] The connecting piece 5 is used for welding with the electrode 61 to transfer the current, and the relative position of the busbar and the battery is also determined to achieve the relative position of the sampling assembly and the battery module.

[0104] The battery pack of this embodiment includes a battery 6 and a battery temperature sampling system. A temperature detection component 7 for temperature sampling is integrated in the battery 6 to detect the temperature inside the battery 6. The signal transmission component 3 transmits the signal collected by the temperature detection component 7 to the monitoring system outside the battery pack.

[0105] An embedded magnetic attraction part 33 adsorbed with the magnetic part 74 of the temperature detection part 7 is provided at one end of the signal transmission part 3, so as to realize the contact connection between the end face of the recessed second electrical connector 32 and the first electrical connector 73 of the temperature detection part 7. Two mounting grooves 35 are provided at the other end of the signal transmission part 3, and an insulating isolation wall is provided between the two mounting grooves 35. The two mounting grooves 35 are respectively used to accommodate the welding points of the two second electrical connectors 32 and the sampling signal line 1, the metal material connection part 36 of the second electrical connector 32 located in the mounting groove 35, and the wire core of the sampling signal line 1 and other charged bodies. The mounting groove 35 is filled with sealant 37. The sealant 37 is filled in the mounting groove 35 and covers the above-mentioned charged body. On the one hand, it is beneficial to the protection of the welding point and avoids the external stress directly acting on the welding point or the charged body. On the other hand, it can also play the role of insulating packaging and effectively avoid short circuit or external water vapor intrusion.

[0106] The sampling signal line 1 transfers the signal through the connector 2. The sampling signal line 1 can be formed by using a conventional wire, or a charged body such as a metal wire, a metal sheet, or a special-shaped metal strip, and an insulating film is covered on the upper and lower sides of the conductive body.

[0107] The bearing component 4 can integrate the sampling signal line 1, the connector 2, the signal transmission component 3, and the connecting piece 5 together to ensure the integrity of the sampling component and the convenience of installation.

[0108] The signal transmission component 3 and the sampling signal line 1 can be connected by laser welding, soldering, resistance welding, etc. The boss 34 of the signal transmission component 3 can be cylindrical or polygonal.

[0109] The bearing component 4 is a bearing film, which can be made of insulating material. In order to save costs and simplify the structure, the bearing component 4 may not be used.

[0110] The technical solution of this embodiment has the following technical effects.

[0111] 1. The signal transmission component 3 and the temperature detection component 7 are designed to be independent and detachable.

[0112] 2. In terms of detachability and easy assembly, it avoids traditional welding, crimping, or other auxiliary fixing structures, and uses the magnetic adsorption force of magnets to achieve process assembly guidance and signal conduction. And whether it is assembly or disassembly, there is no need to touch the connection point, and disassembly and installation positioning can be achieved by simply pulling the sampling line.

[0113] 3. In the battery module structure of this embodiment, temperature sampling and signal transmission are installed by utilizing the thickness of the connecting sheet (busbar) and the height space gap of the electrode 61, without occupying the space above the bar sheet. For square batteries, it can effectively save Z-axis space (see Figure 7 ).

[0114] The above description is only an exemplary embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery temperature sampling system, characterized in that: include: A temperature detection component (7) comprising a first base (71) for connecting to the battery (6), a temperature sensing element (72) mounted on the first base (71), and a first electrical connection element (73) mounted on the first base (71) and connected to the temperature sensing element (72) by signal; and A signal transmission component (3), comprising a second base (31) pluggably connected to the first base (71) and a second electrical connector (32) mounted on the second base (31), wherein the second electrical connector (32) is configured to abut against the first electrical connector (73) when the first base (71) and the second base (31) are plugged together, and to be separated from the first electrical connector (73) when the first base (71) and the second base (31) are separated. One of the first base (71) and the second base (31) is provided with a magnetic component (74), and the other is provided with a magnetic attraction component (33) that can attract the magnetic component (74).

2. The battery temperature sampling system according to claim 1, characterized in that: A first plug-in structure is provided at one end of the first base (71) adjacent to the second base (31), and a second plug-in structure pluggably matched with the first plug-in structure is provided at one end of the second base (31) adjacent to the first base (71), and one of the first plug-in structure and the second plug-in structure is an embedding groove (75), and the other is an embedding portion adapted to the cross section of the embedding groove (75).

3. The battery temperature sampling system according to claim 2, characterized in that: The embedded portion is a portion of the first base (71) or the second base (31) along the depth direction of the embedding groove (75); or The embedding portion is a protrusion provided on the first base (71) or the second base (31) and adapted to the embedding groove (75).

4. The battery temperature sampling system according to claim 2, characterized in that: The cross section of the embedding groove (75) is a polygonal structure, so that the first base (71) and the second base (31) can be matched to prevent rotation.

5. The battery temperature sampling system according to claim 2, characterized in that: The first electrical connector (73) is embedded in a surface of the first plug-in structure facing the second plug-in structure; and the second electrical connector (32) is embedded in a surface of the second plug-in structure facing the first plug-in structure.

6. The battery temperature sampling system according to claim 2, characterized in that: One of the first plug-in structure and the second plug-in structure comprises a groove (76), and the other comprises a boss (34) matched with the groove (76), and the depth direction of the groove (76) is consistent with the depth direction of the embedding groove (75).

7. The battery temperature sampling system according to claim 6, characterized in that: The first plug-in structure comprises the embedding groove (75) and the groove (76), and the groove (76) is arranged at the bottom of the embedding groove (75).

8. The battery temperature sampling system according to claim 7, characterized in that: One of the first electrical connector (73) and the second electrical connector (32) is embedded in the bottom surface of the groove (76), and the other is embedded in the end surface of the boss (34) facing the bottom surface of the groove (76).

9. The battery temperature sampling system according to claim 1, characterized in that: The battery temperature sampling system further comprises a sheet-shaped bearing component (4), the bearing component (4) being provided with a mounting hole (41), and the temperature detection component (7) being mounted in the mounting hole (41) and fixedly connected to the bearing component (4).

10. The battery temperature sampling system according to claim 9, characterized in that: The temperature sensing component (72) is in contact with the battery (6); the first base (71) and the temperature sensing component (72) are arranged along the depth direction of the mounting hole (41) and are located on a side of the temperature sensing component (72) away from the battery (6).

11. The battery temperature sampling system according to claim 9, characterized in that: The signal transmission component (3) is arranged in the mounting hole (41) and is located at an end of the temperature detection component (7) away from the battery (6) along the depth direction of the mounting hole (41).

12. The battery temperature sampling system according to claim 9, characterized in that: It also includes a sampling signal line (1) connected to the second electrical connector (32) of the signal transmission component (3), and the sampling signal line (1) is laid on a side of the bearing component (4) away from the battery (6).

13. The battery temperature sampling system according to claim 12, characterized in that: The battery temperature sampling system comprises a plurality of the temperature detection components (7), a plurality of the signal transmission components (3) arranged in a one-to-one correspondence with the plurality of the temperature detection components (7), and a plurality of the sampling signal lines (1) arranged in a one-to-one correspondence with the plurality of the signal transmission components (3); The battery temperature sampling system further comprises a connector (2), wherein the connector (2) comprises input terminals corresponding one-to-one to the plurality of sampling signal lines (1).

14. The battery temperature sampling system according to claim 13, characterized in that: The output end of the connector (2) is a pluggable connection structure.

15. A battery pack, characterized in that: The battery pack comprises a battery temperature acquisition device according to any one of claims 9 to 14 and a plurality of batteries (6), wherein the bearing component (4) is provided on one end of the plurality of batteries (6) provided with electrodes (61), the battery pack further comprises a connecting piece (5) connecting adjacent batteries (6), and the battery temperature acquisition device does not protrude from the connecting piece (5) or the electrode (61).

16. A battery pack, characterized in that: A battery temperature sampling system comprising the battery temperature sampling system according to any one of claims 1 to 14.

17. An electrical device, characterized in that: Including the battery pack as described in claim 15 or 16.

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