Battery wiring harness isolation plate assembly, battery pack and power consumption device

Abstract

The utility model discloses a battery harness isolation plate assembly, a battery pack and an electric device. The battery harness isolation plate assembly comprises: a harness isolation plate (1) provided with a through hole (11); an electrical connection sheet (2) arranged on one side of the harness isolation plate (1) and comprising connection portions (21) respectively opposite to two through holes (11), the two connection portions (21) being used to respectively connect electrode terminals of two battery cells (120) on the other side of the harness isolation plate (1); and a cooling component (3) comprising a phase change material (31) that absorbs heat by changing the state of matter and a heat-conducting covering component (32) that encapsulates the phase change material (31), the cooling component (3) being in the form of a sheet and attached to a side of the electrical connection sheet (2) that is away from the harness isolation plate (1).

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a wire harness isolation plate assembly of a battery, a battery pack and an electric device. Background Art

[0002] The battery pack includes multiple battery cells arranged side by side, and the electrode terminals of adjacent battery cells are connected by electrical connecting sheets to connect the multiple battery cells in series or in parallel. The connection between the electrode terminals and the electrical connecting sheets is prone to high temperatures, which affects the application performance of the battery pack and may even pose a safety hazard. Utility Model Content

[0003] The present application aims to provide a battery wiring harness isolation plate assembly, a battery pack and an electrical device to improve the problem of excessive temperature of electrode terminals and electrical connecting pieces existing in the related art.

[0004] According to one aspect of the present application, a wiring harness isolation plate assembly of a battery is provided, and the wiring harness isolation plate assembly of the battery includes: a wiring harness isolation plate, which is provided with a through hole; an electrical connecting plate, which is arranged on one side of the wiring harness isolation plate and includes connecting parts respectively opposite to two through holes, and the two connecting parts are used to respectively connect the electrode terminals of two battery cells on the other side of the wiring harness isolation plate; a cooling component, including a phase change material that absorbs heat through a change in material state and a covering component that encapsulates the phase change material and is heat-conducting, and the cooling component is in the form of a sheet and is attached to the side of the electrical connecting plate away from the wiring harness isolation plate.

[0005] In some embodiments, a side of the electrical connection sheet facing away from the wire harness isolation plate is completely covered by the cooling component.

[0006] In some embodiments, a groove matched with the electrical connection piece is provided on the surface of the wiring harness isolation plate, the electrical connection piece is arranged in the groove, and / or the cooling component is arranged in the groove.

[0007] In some embodiments, the electrical connection sheet and the wiring harness isolation plate are integrated into one body.

[0008] In some embodiments, the cooling component is provided with a welding clearance hole opposite to the through hole, and the electrical connection piece and the cooling component are integrated into one body, or the electrical connection piece, the wiring harness isolation plate and the cooling component are integrated into one body.

[0009] In some embodiments, a positioning protrusion is provided on one of the wiring harness isolation plate and the electrical connection plate, and a positioning structure matched with the positioning protrusion is provided on the other, and the positioning structure includes a positioning hole or a positioning groove.

[0010] In some embodiments, the cover component includes a thermally conductive film.

[0011] In some embodiments, the thermally conductive film includes one of a polyimide film, a polypropylene film, a polycarbonate film, and a polyethylene terephthalate film.

[0012] In some embodiments, the phase change material includes a gel phase change material or an inorganic phase change material.

[0013] In some embodiments, the gel phase change material comprises acrylic gel; or, the inorganic phase change material comprises sodium metasilicate hydrated hydroxy cellulose.

[0014] According to another aspect of the present application, a battery pack is also provided, which includes the above-mentioned wiring harness isolation plate assembly.

[0015] In some embodiments, the battery pack includes a plurality of battery cells arranged side by side, the wiring harness isolation plate assembly covers one end of the battery cell where an electrode terminal is provided, the electrode terminal is arranged opposite to the through hole, and two connecting parts of the electrical connecting piece are respectively connected to the electrode terminal of the battery cell through a through hole, the battery pack also includes a cooling plate covering a side of the cooling component away from the wiring harness isolation plate, and the cooling plate is provided with a flow channel for circulating a cooling medium.

[0016] According to another aspect of the present application, an electric device is also provided, and the electric device includes the above-mentioned battery pack.

[0017] By applying the technical solution of the present application, the phase change material encapsulated by the covering component is attached to the electrical connecting piece. When the temperature of the electrical connecting piece is higher than the phase change temperature of the phase change material, the phase change material undergoes a phase change. The phase change material absorbs heat during the phase change process to cool the electrical connecting piece, the electrode terminal and the welding point between the two, thereby preventing the normal operation of the battery pack from being affected by excessive temperature, thereby improving the safety of the battery pack.

[0018] Furthermore, the phase change material is encapsulated by a covering component made of a heat-conducting material. Under the premise of not affecting the cooling of components such as the electrical connecting piece, the phase change material and the electrical connecting piece are isolated to prevent the phase change material from corroding components such as the electrical connecting piece. This helps prevent the phase change material from changing into an easily flowable phase due to heat and flowing to other positions in the battery pack, thereby improving the safety of the battery pack.

[0019] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application 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 present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A schematic structural diagram of an electric device disclosed in some embodiments of the present application is shown.

[0022] Figure 2 A schematic diagram of the exploded structure of a battery pack disclosed in some embodiments of the present application is shown.

[0023] Figure 3 A schematic structural diagram of a battery cell disclosed in some embodiments of the present application is shown.

[0024] Figure 4 A schematic diagram of the three-dimensional structure of an insulating plate of a wiring harness isolation plate assembly of a battery disclosed in some embodiments of the present application is shown.

[0025] Figure 5 A schematic structural diagram of an insulating plate and a connecting plate of a wiring harness isolation plate assembly of a battery disclosed in some embodiments of the present application is shown.

[0026] Figure 6 Shows Figure 5 Schematic diagram of the cross-sectional structure at AA.

[0027] Figure 7 Shows Figure 5 Schematic diagram of the side structure.

[0028] Figure 8 Shows Figure 5 A side view structural schematic diagram of the other side.

[0029] Fig. 9 Shows Figure 5 Schematic diagram of the structure viewed from above.

[0030] Fig.10 A schematic structural diagram of an insulating plate and a connecting plate of a wiring harness isolation plate assembly of a battery disclosed in some embodiments of the present application is shown.

[0031] Fig.11 A three-dimensional structural schematic diagram of a wiring harness isolation plate assembly of a battery disclosed in some embodiments of the present application is shown.

[0032] Fig.12 A schematic structural diagram of a wiring harness isolation plate assembly of a battery disclosed in some embodiments of the present application is shown.

[0033] Fig.13 A schematic diagram of the three-dimensional structure of a cooling component of a wiring harness isolation plate assembly of a battery disclosed in some embodiments of the present application is shown.

[0034] Fig.14 A three-dimensional structural schematic diagram of a cooling component of a wiring harness isolation plate assembly of a battery disclosed in some embodiments of the present application is shown.

[0035] Fig.15 A schematic cross-sectional structure diagram of a cooling component of a wiring harness isolation plate assembly of a battery disclosed in some embodiments of the present application is shown.

[0036] Fig.16 A schematic structural diagram of a cooling component of a wiring harness isolation plate assembly of a battery disclosed in some embodiments of the present application is shown.

[0037] In the figure: 1000, vehicle; 100, battery pack; 110, casing; 111, first part; 112, second part; 120, battery cell; 121, end cover; 121a, electrode terminal; 122, casing; 123, battery cell assembly; 123a, pole ear; 200, controller; 300, motor; 1, wiring harness isolation plate; 11, through hole; 12, embedded groove; 13, positioning protrusion; 2, electrical connecting piece; 21, connecting part; 22, positioning structure; 3, cooling component; 31, phase change material; 32, covering component; 33, clearance hole. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] In the description of the present application, 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 application 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 application. 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.

[0040] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 this application can be understood according to the specific circumstances.

[0041] Further, " scope " disclosed in the present application is limited in the form of lower limit and upper limit, and given range is limited by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundary of special range. The scope limited in this way can be including end value or not including end value, and can be combined arbitrarily, that is, any lower limit can form a scope with any upper limit combination. For example, if the scope of 60-120 and 80-110 is listed for a particular parameter, it is understood that the scope of 60-110 and 80-120 is also expected. In addition, if the minimum range value 1 and 2 listed, and if the maximum range value 3,4 and 5 are listed, the following scope can all be expected: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In the present application, unless otherwise specified, the numerical range "ab" represents the abbreviation of any real number combination between a and b, wherein a and b are real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0042] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0043] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0044] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0045] If there is no special explanation, the "include" and "comprising" mentioned in this application are open-ended or closed-ended. 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.

[0046] If not specifically stated, in this application, 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).

[0047] 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.

[0048] 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.

[0049] In some embodiments of the present application, 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.

[0050] Please refer to Figure 2 , Figure 2 An exploded view of a battery pack 100 provided for some embodiments of the present application. 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.

[0051] 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.

[0052] 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.

[0053] Please refer to Figure 3 , Figure 3 The schematic diagram of the decomposition structure of the battery cell 120 provided in some embodiments of the present application. 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.

[0054] 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., which is not particularly limited in the present embodiment. In some embodiments, an insulating member can 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.

[0055] 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 application does not impose any special limitation on this.

[0056] 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.

[0057] 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.

[0058] The battery pack 100 includes a plurality of battery cells 120 arranged side by side in a box 110, a harness isolating plate 1 covering one end of the battery cell 120 provided with an electrode terminal 121a, and a harness for transmitting parameter signals of the battery cell 120 provided on a side of the harness isolating plate 1 away from the battery cell 120. The harness isolating plate 1 is provided with a through hole 11 opposite to the electrode terminal 121a of the battery cell 120, and the electrode terminals 121a of adjacent battery cells 120 are connected through an electrical connection piece 2 provided on a side of the harness isolating plate 1 away from the battery cell 120, and both ends of the electrical connection piece 2 are respectively connected to the electrode terminals 121a of two battery cells 120, and the electrical connection piece 2 is usually welded to the electrode terminal 121a at the position of the through hole 11 mentioned above.

[0059] The welding position between the electrical connecting piece 2 and the electrode terminal 121a may easily lead to high resistance due to poor welding quality, insufficient cleaning before welding or changes in the microstructure of the metal during the welding process. As a result, high temperatures may easily occur during the operation of the battery pack, which may have a certain impact on the operation of the battery pack 100 at the vehicle manufacturer.

[0060] In order to improve the above problems, combined Figures 11 to 14 This embodiment provides a wiring harness isolation plate assembly of a battery, including a wiring harness isolation plate 1, an electrical connection plate 2 and a cooling component 3.

[0061] See also Figure 4 , the wiring harness isolation plate 1 is provided with a through hole 11. Figures 4 to 10 The electrical connection sheet 2 is disposed on one side of the harness isolation plate 1 and includes connection portions 21 respectively opposite to the two through holes 11 . The two connection portions 21 are used to respectively connect the electrode terminals 121 a of the two battery cells 120 on the other side of the harness isolation plate 1 .

[0062] See also Fig.15 The cooling component 3 includes a phase change material 31 that absorbs heat by changing the state of the material and a heat-conducting covering component 32 that encapsulates the phase change material 31. Fig.11 and 12 The cooling component 3 is in sheet shape and is attached to a side of the electrical connection sheet 2 away from the wiring harness isolation plate 1 .

[0063] The phase change material 31 encapsulated by the covering component 32 is attached to the electrical connecting piece 2. When the temperature of the electrical connecting piece 2 is higher than the phase change temperature of the phase change material 31, the phase change material 31 undergoes a phase change. The phase change material 31 absorbs heat during the phase change process to cool the electrical connecting piece 2, the electrode terminal 121a, the welding point between the two, and even the battery cell inside the battery cell 120, so as to prevent the normal operation of the battery pack from being affected by excessive temperature, thereby improving the safety of the battery pack.

[0064] Furthermore, the phase change material 31 is encapsulated by a covering component 32 of a heat-conductive material. Under the premise of not affecting the cooling of the electrical connection sheet 2 and components such as the battery cell, the phase change material 31 and the electrical connection sheet 2 are isolated to prevent the phase change material 31 from corroding components such as the electrical connection sheet 2. This is also beneficial in preventing the phase change material 31 from changing into an easily flowable phase due to heat and flowing to other positions in the battery pack 100, thereby improving the safety of the battery pack.

[0065] In some embodiments, one side of the electrical connection sheet 2 away from the wiring harness isolation plate 1 is completely covered by the cooling component 3, which is beneficial to increase the contact area between the cooling component 3 and the electrical connection sheet 2 and the content of the phase change material 31, thereby improving the cooling performance of the cooling component 3 to ensure the normal operation of the battery pack 100, and is beneficial to prevent the normal operation of the battery pack from being affected by excessive temperature, thereby improving the safety of the battery pack.

[0066] In some embodiments, a groove 12 adapted to the electrical connection sheet 2 is provided on the surface of the harness isolation plate 1, and the electrical connection sheet 2 is disposed in the groove 12. In some embodiments, the cooling component 3 is also disposed in the groove 12. This is beneficial to reducing the overall height of the harness isolation plate assembly, improving the compactness of the battery pack structure, and improving the energy density of the battery pack. Furthermore, the electrical connection sheet 2 is embedded in the groove 12, which is also beneficial to positioning the electrical connection sheet 2 and preventing the electrical connection sheet 2 from moving relative to the harness isolation plate 1.

[0067] In some embodiments, the electrical connection sheet 2 and the wiring harness isolation plate 1 are integrated into one. Before the electrical connection sheet 2 is welded to the electrode terminal 121a, the electrical connection sheet 2 has been fixed on the wiring harness isolation plate 1 at a predetermined position. When assembling the battery pack, the wiring harness isolation plate 1 carrying multiple electrical connection sheets 2 is covered on multiple battery cells 120 arranged side by side. The electrical connection sheet 2 can be aligned with the electrode terminal 121a of the predetermined battery cell 120, and then the connecting portion 21 of the electrical connection sheet 2 is welded to the corresponding electrode terminal 121a, and then the cooling component 3 is attached to the electrical connection sheet 2, which is beneficial to improving the assembly efficiency of the battery pack 100.

[0068] In other embodiments, see Fig.16 The cooling component 3 is provided with a welding clearance hole 33 opposite to the through hole 11, and the electrical connection piece 2 and the cooling component 3 are integrated into one body, or the electrical connection piece 2, the wiring harness isolation plate 1 and the cooling component 3 are integrated into one body.

[0069] Before welding the electrical connecting piece 2 to the electrode terminal 121a, the electrical connecting piece 2 and the cooling component 3 have been fixed on the wiring harness isolation plate 1 according to the predetermined position. When assembling the battery pack, the wiring harness isolation plate 1 carrying multiple electrical connecting pieces 2 and the cooling component 3 is covered on multiple battery cells 120 arranged side by side. The electrical connecting piece 2 can be aligned with the electrode terminal of the predetermined battery cell 120, and then the connecting portion 21 of the electrical connecting piece 2 is welded to the corresponding electrode terminal 121a, which is beneficial to improving the assembly efficiency of the battery pack 100.

[0070] In some embodiments, a positioning protrusion 13 is provided on one of the wiring harness isolation plate 1 and the electrical connection plate 2, and a positioning structure 22 adapted to the positioning protrusion 13 is provided on the other, and the positioning structure 22 includes a positioning hole or a positioning groove. The positioning protrusion 13 and the positioning structure 22 cooperate to fix the electrical connection plate 2 at a predetermined position relative to the wiring harness isolation plate 1, which is beneficial to prevent the electrical connection plate 2 from moving relative to the wiring harness isolation plate 1, and is beneficial to improving the assembly accuracy of the battery pack.

[0071] In some embodiments, the coating component 32 includes a heat-conducting film, and the heat-conducting part encapsulates the phase change material 31 inside, which is conducive to preventing the phase change material 31 from being isolated from the electrical connection sheet 2 without affecting the cooling of the electrical connection sheet 2 and other components, preventing the phase change material 31 from corroding the electrical connection sheet 2 and other components, and preventing the phase change material 31 from flowing to other positions in the battery pack 100 due to the phase change of the phase into a flowable phase due to heat, thereby improving the safety of the battery pack. The thermal conductivity of the heat-conducting film is ≥1W / m∙K.

[0072] In some embodiments, the thermally conductive film includes one of a polyimide film, a polypropylene film, a polycarbonate film, and a polyethylene terephthalate film.

[0073] The phase change material 31 may be a gel phase change material or an inorganic phase change material.

[0074] In some embodiments, the gel phase change material includes acrylic gel; the phase change enthalpy of the acrylic gel phase change material is ≥1900 kJ / kg, and the phase change temperature is ≥110°C.

[0075] In other embodiments, the inorganic phase change material includes sodium metasilicate hydrated hydroxy cellulose (sodium metasilicate hydrated hydroxy cellulose), the phase change enthalpy ≥ 2000 kJ / kg, and the phase change temperature ≥ 110°C.

[0076] According to another aspect of the present application, a battery pack is also provided, and the battery pack includes the above-mentioned wiring harness isolation plate assembly.

[0077] In some embodiments, the battery pack includes a plurality of battery cells 120 arranged side by side, the wire harness isolation plate assembly is covered on one end of the battery cell 120 provided with an electrode terminal 121a, the electrode terminal 121a is arranged opposite to the through hole 11, and the two connection parts 21 of the electrical connection sheet 2 are respectively connected to the electrode terminal of the battery cell 120 through a through hole, and the battery pack further includes a cooling plate covered on a side of the cooling component 3 away from the wire harness isolation plate 1, and the cooling plate is provided with a flow channel for circulating a cooling medium. The cooling medium may be water.

[0078] A cooling medium plate is arranged above the phase change material of the harness isolation plate 1 to achieve temperature management of the phase change material and the electrical connection plate 2, which effectively solves the problem of the cooling structure design at the bottom of the battery cell 120 and the space occupied by the large surface cooling medium plate structure design.

[0079] The phase change material 31 is encapsulated by a thermally conductive film and formed into an integrated structure with the wiring harness isolation plate 1 to manage the heat of the electrical connection piece 2 and prevent the phase change material 31 from directly contacting the electrical connection piece 2. The electrical connection piece 2 is structurally designed to reduce complexity and improve integration and assembly efficiency.

[0080] A chamber structure (embedded groove 12) is formed on the entire wiring harness isolation plate 1 to realize adding a cooling component 3 in the wiring harness isolation plate 1. The cooling component 3 is in contact with the electrical connection piece 2 and the electrode terminal 121a through a heat-conductive film to realize cooling of the electrode terminal 121a. The focus is on the design of the integrated structure of the wiring harness isolation plate.

[0081] Further development is to cleverly set a cooling medium plate above the phase change material of the harness isolation plate 1 to achieve temperature management of the phase change material and the electrical connection plate 2, effectively solving the problem of space occupation by the water cooling structure design at the bottom of the battery cell and the large surface cooling medium plate structure design of the battery cell. Lightweight and weight reduction.

[0082] Cooling the battery cell through the electrode terminal 121a avoids the problem of low efficiency of large-surface thermal management. The integrated wiring harness isolation plate assembly effectively utilizes the structural space of the wiring harness isolation plate 1, eliminates the bottom cooling medium plate, and utilizes the structural advantages of the wiring harness isolation plate 1 to reduce the Z-direction (height direction) space, making the battery pack thinner and having a higher energy density.

[0083] The thermal management component (cooling component 3) is integrated with the wiring harness isolation plate 1. The temperature reduction utilizes the structural advantages of the electrode terminal 121a and the wiring harness isolation plate 1. The temperature reduction efficiency is high and the temperature reduction design unit is integrated with the wiring harness isolation plate. Especially for the current 6C, 10C and other fast charging, the use of the electrical connecting piece 2 for temperature reduction will effectively improve the charging and discharging safety of the battery cell.

[0084] In addition, the thermal management design above the electrical connection sheet 2 can reduce the high-temperature thermal shock to the upper cover of the battery pack when the battery cell thermally runs away, thereby improving the safety of the pack.

[0085] The high integration of thermal management and wiring harness isolation plate reduces the Z-direction space. If the cooling medium plate is designed above the electrode terminal 121a, the thermal shock of thermal runaway of the battery cell on the battery pack cover will be reduced, thereby improving safety.

[0086] The above are merely exemplary embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery wiring harness isolation plate assembly, characterized in that: include: A wire harness isolation plate (1) provided with a through hole (11); An electrical connection sheet (2) disposed on one side of the wiring harness isolation plate (1) and comprising connection portions (21) respectively opposite to the two through holes (11), the two connection portions (21) being used to respectively connect electrode terminals of two battery cells (120) on the other side of the wiring harness isolation plate (1); A cooling component (3) comprises a phase change material (31) that absorbs heat by changing the state of a substance and a heat-conducting covering component (32) that encapsulates the phase change material (31); the cooling component (3) is in sheet form and is attached to a side of the electrical connection sheet (2) that is away from the wiring harness isolation plate (1).

2. The wire harness isolation plate assembly according to claim 1, characterized in that: A side of the electrical connection sheet (2) that is away from the wiring harness isolation plate (1) is completely covered by the cooling component (3).

3. The wire harness isolation plate assembly according to claim 1, characterized in that: A groove (12) adapted to the electrical connection piece (2) is provided on the surface of the wiring harness isolation plate (1); the electrical connection piece (2) is arranged in the groove (12); and / or the cooling component (3) is arranged in the groove (12).

4. The wire harness isolation plate assembly according to claim 1, characterized in that: The electrical connection sheet (2) and the wiring harness isolation plate (1) are integrated into one body.

5. The wire harness isolation plate assembly according to claim 1, characterized in that: The cooling component (3) is provided with a welding clearance hole (33) opposite to the through hole (11); the electrical connection piece (2) and the cooling component (3) are integrated into one body, or the electrical connection piece (2), the wiring harness isolation plate (1) and the cooling component (3) are integrated into one body.

6. The wire harness isolation plate assembly according to claim 1, characterized in that: One of the wiring harness isolation plate (1) and the electrical connection plate (2) is provided with a positioning protrusion (13), and the other is provided with a positioning structure (22) matched with the positioning protrusion (13), wherein the positioning structure (22) comprises a positioning hole or a positioning groove.

7. The wire harness isolation plate assembly according to claim 1, characterized in that: The covering component (32) comprises a heat-conducting film.

8. The wire harness isolation plate assembly according to claim 7, characterized in that: The thermally conductive film includes one of a polyimide film, a polypropylene film, a polycarbonate film and a polyethylene terephthalate film.

9. The wire harness isolation plate assembly according to claim 1, characterized in that: The phase change material (31) comprises a gel phase change material or an inorganic phase change material.

10. The wire harness isolation plate assembly according to claim 9, characterized in that: The gel phase change material includes acrylic gel; or the inorganic phase change material includes sodium metasilicate hydrated hydroxy cellulose.

11. A battery pack, characterized in that: A wire harness isolation plate assembly comprising any one of claims 1 to 10.

12. The battery pack according to claim 11, characterized in that: The invention comprises a plurality of battery cells (120) arranged side by side, wherein the wiring harness isolation plate assembly is covered on one end of the battery cell (120) provided with an electrode terminal, the electrode terminal is arranged opposite to the through hole (11), the two connecting portions (21) of the electrical connecting sheet (2) are respectively connected to the electrode terminal of the battery cell (120) through a through hole, and the battery pack further comprises a cooling plate covered on a side of the cooling component (3) away from the wiring harness isolation plate (1), the cooling plate being provided with a flow channel for circulating a cooling medium.

13. An electrical device, characterized in that: Comprising the battery pack according to claim 11 or 12.

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