Wire harness sampling components, energy storage devices and electrical equipment

Abstract

The present application relates to the field of energy storage technology, and discloses a wire harness sampling assembly, an energy storage device, and an electrical device. The wire harness sampling assembly includes a carrier plate, a plurality of bus bars, and a collection assembly. The plurality of bus bars are assembled on the carrier plate; the collection assembly includes a circuit board assembled on the carrier plate and a protective layer covering the surface of the circuit board facing away from the carrier plate. The circuit board includes a board body and a plurality of collection terminals connected to the board body. The ends of the plurality of collection terminals are electrically connected to the plurality of bus bars, respectively. The protective layer includes a first protective portion and a second protective portion connected to each other. The first protective portion has an adhesive layer on the side facing the circuit board, and the adhesive layer is connected between the first protective portion and the board body. The second protective portion has an exposed surface on the side facing the circuit board, and the exposed surface covers at least part of the collection terminals.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a wiring harness sampling assembly, an energy storage device, and electrical equipment. Background Art

[0002] A battery pack includes multiple electrically connected single cells. During use, the entire battery pack may short-circuit due to thermal runaway of one or more single cells. Summary of the Invention

[0003] The embodiments of the present application provide a wiring harness sampling assembly, an energy storage device, and an electrical device to solve the problem in the related art of short circuiting of a battery pack due to thermal runaway of one or more single cells.

[0004] The wiring harness sampling assembly of the embodiment of the present application includes:

[0005] Carrying tray;

[0006] A plurality of bus bars are assembled on the carrier plate; and

[0007] The acquisition component includes a circuit board assembled on the carrier plate and a protective layer covering the surface of the circuit board facing away from the carrier plate. The circuit board includes a board body and a plurality of acquisition terminals connected to the board body. The ends of the plurality of acquisition terminals are electrically connected to the plurality of bus bars, respectively. The protective layer includes a first protective portion and a second protective portion connected to each other. The first protective portion has a backing adhesive layer on the side facing the circuit board, and the backing adhesive layer is connected between the first protective portion and the board body. The surface of the second protective portion facing the circuit board is an exposed surface, and the exposed surface covers at least part of the acquisition terminals.

[0008] In the embodiments of the present application, a protective layer is applied to the side of the circuit board facing away from the carrier tray. This prevents high-temperature, high-pressure fluid ejected from a single battery cell during thermal runaway from directly splashing onto the circuit board. The protective layer protects the circuit board, thereby preventing the wiring harness on the circuit board from burning through and causing a short circuit, and preventing cascading thermal runaway in the remaining single batteries, thereby improving the safety of the entire energy storage device. Furthermore, the protective layer is designed in sections, with the first protective section having an adhesive layer on the side facing the circuit board, while the second protective section has an exposed surface on the side facing the circuit board. The first protective section is bonded to the circuit board body via the adhesive layer, while the exposed surface covers at least a portion of the collection terminals. Through such a design, on the one hand, the first protective part is bonded to the board body through the adhesive layer, and the adhesive layer avoids the collection terminals, which not only ensures the firmness of the connection between the protective layer and the circuit board and prevents the protective layer from falling off the circuit board, but also ensures that the collection terminals of the circuit board have good elasticity after the single battery expands; on the other hand, the exposed surface of the second protective part only covers the collection terminals but is not bonded to the collection terminals. The second protective part improves the overall tearability of the protective layer. When there is an error in the pasting position of the protective layer or the circuit board needs to be checked, the entire protective layer can be torn off from the circuit board along the second protective part. The operation is simple, and when the protective layer is torn off from the circuit board, the circuit at the collection terminal will not be pulled and damaged.

[0009] According to some embodiments of the present application, the circuit board is in the shape of an elongated strip, and the plurality of acquisition terminals are located on the same long side of the circuit board;

[0010] The protective layer is in a long strip shape, the first protective portion and the second protective portion are arranged along the width direction of the protective layer, and the second protective portion covers at least a portion of each of the collecting terminals on the same long side of the circuit board.

[0011] In the embodiment of the present application, the first protective portion and the second protective portion of the protective layer are arranged along the width direction of the protective layer. Since the protective layer is in the shape of a long strip, the first protective portion and the second protective portion are both in the shape of a long strip. When there is an error in the pasting position of the protective layer or the circuit board needs to be checked, the operator can tear off the second protective portion on one side in the width direction of the protective layer, further improving the tearability of the protective layer.

[0012] According to some embodiments of the present application, the first protective portion is further connected to the carrying plate through the adhesive layer.

[0013] According to some embodiments of the present application, the circuit board is long and narrow, the acquisition terminal is located on one of the long sides of the circuit board, and part of the first protective portion extends out of the edge of the other long side of the circuit board and is glued to the carrying plate.

[0014] In the embodiment of the present application, the first protective portion is not only connected to the circuit board through the back adhesive layer, but the first protective portion also extends out from the side edge of the circuit board and is glued to the carrier plate. On the one hand, the first protective portion covers the side edge of the circuit board to prevent the side edge of the circuit board from being exposed, thereby ensuring the safety of the circuit board during thermal runaway; on the other hand, the first protective portion is glued to the circuit board and the carrier plate at the same time, thereby improving the firmness of the bonding of the protective layer and reducing the possibility of the circuit board being damaged by the high-temperature and high-pressure fluid caused by thermal runaway.

[0015] According to some embodiments of the present application, the protective layer is in the shape of an elongated strip, the first protective portion and the second protective portion are arranged along the width direction of the protective layer, the width of the first protective portion is W1, the width of the second protective portion is W2, and 1 / 2≤W1 / W2≤3 / 4.

[0016] In the embodiment of the present application, W1 and W2 satisfy: 1 / 2≤W1 / W2≤3 / 4. On the one hand, it can avoid the separation of the protective layer and the circuit board caused by scratches during the production and assembly of the battery pack; on the other hand, after the battery module has been in operation for a long time, the adhesive strength of the back glue of the protective layer will also decrease. In order to ensure the expansion buffering of the collection terminal position of the circuit board and at the same time ensure the bonding stability of the protective layer and the circuit board, the width of the back glue layer of the protective layer is designed to be 1 / 2≤W1 / W2≤3 / 4 to ensure the bonding strength between the back glue layer and the circuit board.

[0017] According to some embodiments of the present application, the carrier tray has a first mounting position, the circuit board is assembled in the first mounting position, and the first mounting position has a first groove; a first terminal assembly is provided at one end of the circuit board, and at least a portion of the first terminal assembly is located in the first groove;

[0018] One of the multiple busbars is an output busbar, and an end of one of the collection terminals is electrically connected to the output busbar; a surface of the output busbar facing away from the carrier plate is flush with a surface of the circuit board facing away from the carrier plate.

[0019] In an embodiment of the present application, at least a portion of the first terminal assembly at one end of the circuit board is accommodated in the first groove of the carrier plate, so that the surface of the first output bus facing away from the carrier plate is flush with the surface of the circuit board facing away from the carrier plate, thereby avoiding a height difference between the upper surface of the first output bus and the upper surface of the circuit board. This ensures that the acquisition terminal can be stably connected to the first output bus in a straight posture, thereby ensuring the stability of the connection between the acquisition terminal and the first output bus.

[0020] According to some embodiments of the present application, the first terminal assembly includes a first connector and a first mounting seat, the first connector is fixed to the side surface of the circuit board facing away from the carrier plate, the first mounting seat is fixed to the side surface of the circuit board facing the carrier plate, and at least a portion of the first mounting seat is located in the first groove.

[0021] According to some embodiments of the present application, the first mounting seat is also fixedly connected to the bottom wall of the first groove.

[0022] According to some embodiments of the present application, a first connecting portion is protruding from the bottom surface of the first groove, the first mounting seat has a first through-hole extending therethrough, and the first connecting portion is inserted into the first through-hole.

[0023] According to some embodiments of the present application, a first identification portion is provided on the side of the first protective portion facing away from the circuit board, and a second identification portion is provided on the side of the second protective portion facing away from the circuit board, and the first identification portion is different from the second identification portion.

[0024] In the embodiment of the present application, the first identification portion and the second identification portion can serve as identification to avoid the problem that the elasticity of the acquisition terminal is affected due to the first protective portion being pasted on the acquisition terminal position of the circuit board, and the acquisition terminal circuit is easily damaged when the protective layer is torn off and re-applied.

[0025] According to some embodiments of the present application, the collection terminal includes a collection arm and a conductive member, the collection arm is connected to the plate body, one end of the conductive member is electrically connected to the collection arm, and the other end is electrically connected to the bus, and the second protective portion covers the entire collection arm and part of the conductive member.

[0026] In the embodiment of the present application, the second protective portion covers the entire collection arm, so that the circuits on the collection arm are not exposed. The high-temperature and high-pressure fluid generated by thermal runaway of a single cell will not directly splash onto the collection arm, thereby preventing the collection arm from being burned through and causing a short circuit.

[0027] The energy storage device of the embodiment of the present application includes any one of the above-mentioned wire harness sampling components.

[0028] According to some embodiments of the present application, the energy storage device further includes a plurality of battery modules, the plurality of battery modules including a first battery module and a second battery module, the first battery module and the second battery module are arranged along the length direction of the battery module, a first end plate is provided on a side of the first battery module facing the second battery module, and a second end plate is provided on a side of the second battery module facing the first battery module;

[0029] The energy storage device includes a plurality of wire harness sampling assemblies, the plurality of wire harness sampling assemblies including a first wire harness sampling assembly and a second wire harness sampling assembly, the first wire harness sampling assembly corresponding to the first battery module, the second wire harness sampling assembly corresponding to the second battery module, and a circuit board of the second wire harness sampling assembly having an extended section extending from a periphery of a carrier plate, the extended section spanning the first end plate and the second end plate and electrically connected to the circuit board of the first wire harness sampling assembly;

[0030] An insulating layer is provided on one side of the protruding section facing the first end plate and the second end plate, the first protective portion is glued to a portion of the protruding section, and an exposed surface of the second protective portion covers at least a portion of the protruding section.

[0031] In an embodiment of the present application, an insulating layer is provided on the side of the protruding section facing the first end plate and the second end plate. On the one hand, the insulating layer enhances the insulation performance of the protruding section, ensuring that there is sufficient electrical clearance between the protruding section and the first end plate and the second end plate, thereby avoiding arcing and fire problems; on the other hand, the insulating layer enhances the rigidity of the protruding section, and to a certain extent reduces the extent of the sagging of the protruding section due to its own gravity, thereby reducing the risk of wear of the protruding section or even damage to the circuit due to friction between the protruding section and the edge of the carrier plate.

[0032] According to some embodiments of the present application, a second terminal assembly is provided at the end of the extending section, and the second terminal assembly is electrically connected to the circuit board of the first wiring harness sampling assembly; the insulating layer extends from the carrying plate of the second wiring harness sampling assembly to the second terminal assembly.

[0033] In an embodiment of the present application, the insulating layer extends from the supporting plate of the second wiring harness sampling assembly to the second terminal assembly, and the insulating layer basically covers the entire protruding section, which not only ensures that there is sufficient electrical clearance between the protruding section and the first end plate and the second end plate, but also improves the overall stiffness of the protruding section.

[0034] According to some embodiments of the present application, the second terminal assembly includes a second mounting seat and a second connector, the second mounting seat is fixed to the side of the protruding section facing the first end plate and the second end plate, the second connector is fixed to the side of the protruding section facing away from the first end plate and the second end plate, and the second connector is electrically connected to the circuit board of the first wiring harness sampling assembly; the insulating layer extends from the supporting plate of the second wiring harness sampling assembly to the second mounting seat.

[0035] According to some embodiments of the present application, the area on the side surface of the extending section facing away from the first end plate and the second end plate corresponding to the second mounting seat in the height direction of the battery module is a bonding area, and at least a portion of the bonding area is glued to the first protective portion of the second wiring harness sampling assembly.

[0036] In an embodiment of the present application, the first protective portion of the protective layer is connected to the bonding area, so that the protective layer can provide a certain pulling force to the protruding section. The pulling force can reduce the downward bending angle of the protruding section to a certain extent. On the one hand, it prevents the protruding section from bending downward at too large an angle under the action of the gravity of the second terminal assembly, thereby preventing stress concentration at the bending position, thereby preventing damage to the substrate of the circuit board and damage to the internal circuit of the circuit board; on the other hand, under the action of tension, the protective layer is not easy to bend downward at a large angle with the protruding section, thereby avoiding creases and wrinkles in the protective layer at the bending position, avoiding poor adhesion between the first protective portion of the protective layer and the circuit board and the formation of a gap, thereby preventing thermal runaway fluid from easily flowing into the circuit board from the gap and causing the circuit board to burn through and be damaged.

[0037] According to some embodiments of the present application, the supporting plate of the second wire harness sampling assembly has a second connecting portion, and the second connecting portion is adjacent to the protruding section and fixedly connected to the circuit board of the second wire harness sampling assembly.

[0038] According to some embodiments of the present application, the carrying plate of the second wire harness sampling assembly has a plurality of second connecting portions, and the plurality of second connecting portions are arranged along the width direction of the battery module.

[0039] In an embodiment of the present application, the supporting plate of the second wiring harness sampling component is provided with a plurality of second connecting parts, and the second connecting parts are adjacent to the protruding section. When the second terminal component at the end of the protruding section is connected to the circuit board of the first wiring harness sampling component, the plurality of second connecting parts can fix the circuit board on the supporting plate as much as possible to prevent the circuit board from twisting, and avoid stress concentration due to twisting of the circuit board, which may cause damage to the substrate and circuit of the circuit board.

[0040] The electrical equipment of the embodiment of the present application includes the energy storage device described in any one of the above items, and the energy storage device is used to supply power to the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0042] Figure 1This is a schematic diagram of an energy storage system.

[0043] Figure 2 It is a schematic diagram of an exploded view of the energy storage device according to an embodiment of the present application.

[0044] Figure 3 It is a three-dimensional schematic diagram of a wire harness sampling component according to an embodiment of the present application.

[0045] Figure 4 yes Figure 3 Schematic diagram of the decomposition.

[0046] Figure 5 This is a schematic diagram of the second protective portion being opened from the circuit board.

[0047] Figure 6 This is a schematic diagram of the adhesive layer being arranged behind the first protective portion of the protective layer.

[0048] Figure 7 This is a schematic diagram showing that at least a portion of the first terminal assembly is located within the first groove.

[0049] Figure 8 This is a schematic diagram of the connection between the circuit board of the second wiring harness sampling component and the circuit board of the first wiring harness sampling component.

[0050] Figure 9 yes Figure 8 A partial enlarged view of point X1 in the middle.

[0051] Figure 10 This is a schematic diagram of an insulating layer disposed on the surface of the extension section facing the first end plate and the second end plate.

[0052] Figure 11 This is a schematic diagram of electrical equipment.

[0053] The description of the accompanying drawings is as follows:

[0054] 100, box body; 110, first box body; 120, second box body;

[0055] 200, battery module; 200a, first battery module; 200b, second battery module; 200c, third battery module; 200d, fourth battery module; 211, first end plate; 212, second end plate; 220, single battery;

[0056] 300, wire harness sampling assembly; 300a, first wire harness sampling assembly; 300b, second wire harness sampling assembly; 300c, third wire harness sampling assembly; 300d, fourth wire harness sampling assembly; 301, first terminal assembly; 3011, first connector; 3012, first mounting seat; 3013, first perforation; 302, second terminal assembly; 3021, second mounting seat; 3022, second connector;

[0057] 310, carrier plate; 311, first mounting position; 3111, first groove; 3112, first connecting portion; 312, second connecting portion; 313, second mounting position; 313a, lead-out mounting position;

[0058] 320, collection component; 321, circuit board; 3211, second perforation; 322, protective layer; 3221, first protective portion; 3222, second protective portion; 3223, first identification portion; 3224, second identification portion; 3225, exposed surface; 323, collection terminal; 3231, collection arm; 3232, conductive element; 324, adhesive layer; 325, insulating layer; 326, extension section; 3261, bonding area; 327, board body;

[0059] 330, bus; 330a, first output bus; 330b, second output bus. DETAILED DESCRIPTION

[0060] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0061] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to the process, method, product, or apparatus.

[0062] For ease of explanation, the "X-axis direction", "Y-axis direction" and "Z-axis direction" are introduced in the specific embodiments of the present application. The terms "X-axis direction", "Y-axis direction" and "Z-axis direction" only mean that the feature with one of the above directions is perpendicular to the feature with the other direction, and do not require that they must be implemented according to the "X-axis direction", "Y-axis direction" and "Z-axis direction" described in the embodiments. In the embodiments, the X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other. Among them, the X-axis direction can be divided into left and right (the direction indicated by the arrow in the X-axis direction is left, and the opposite direction is right), the Y-axis direction can be divided into front and back (the direction indicated by the arrow in the Y-axis direction is front, and the opposite direction is back), and the Z-axis direction can be divided into up and down (the direction indicated by the arrow in the Z-axis direction is up, and the opposite direction is down).

[0063] Since the energy people need is highly temporal and spatial, in order to make rational use of energy and improve energy utilization, it is necessary to use a medium or device to store one form of energy in the same form or convert it into another form of energy, and then release it in a specific form of energy based on future application needs.

[0064] Taking electrochemical energy storage as an example, this solution provides an energy storage device for use in energy storage systems. The energy storage device is equipped with a group of chemical batteries, which mainly use the chemical elements in the batteries as energy storage media. The charging and discharging process is accompanied by chemical reactions or changes in the energy storage medium. Simply put, the electricity generated by wind and solar energy is stored in the chemical battery. When the use of external electricity reaches its peak, the stored electricity is released for use, or transferred to places where electricity is scarce for use.

[0065] Currently, energy storage (i.e., energy storage) has a wide range of application scenarios, including power generation side energy storage, grid side energy storage, and power consumption side energy storage. The corresponding types of energy storage devices include:

[0066] (1) Large-scale energy storage power stations applied to wind power and photovoltaic power stations can help renewable energy generation meet grid connection requirements and improve the utilization rate of renewable energy. As a high-quality active / reactive power supply on the power supply side, energy storage power stations can achieve load matching of electricity in time and space, enhance the capacity to absorb renewable energy, reduce instantaneous power changes, reduce the impact on the power grid, improve the absorption of new energy generation, and are of great significance in grid system backup, alleviating peak load power supply pressure, and peak and frequency regulation.

[0067] (2) Energy storage containers used on the grid side are mainly used for peak shaving, frequency regulation, and relief of grid congestion. They can realize peak shaving and valley filling of electricity load, that is, charging the energy storage battery when the electricity load is low and releasing the stored electricity during the peak period, thereby achieving a balance between electricity production and consumption;

[0068] (3) Small energy storage cabinets used on the power consumption side, whose main functions are self-generation and self-use of electricity, peak-valley price arbitrage, capacity cost management, and improving power supply reliability. According to different application scenarios, energy storage on the power consumption side can be divided into industrial and commercial energy storage cabinets, household energy storage devices, energy storage charging piles, etc., which are generally used in conjunction with distributed photovoltaics. Industrial and commercial users can use energy storage for peak-valley price arbitrage and capacity cost management. In the power market that implements peak-valley electricity prices, by charging the energy storage system when the electricity price is low and discharging the energy storage system when the electricity price is high, peak-valley electricity price arbitrage is achieved, reducing electricity costs. In addition, industrial enterprises that are subject to a two-part electricity price system can use the energy storage system to store energy during low electricity consumption and discharge it during peak load, thereby reducing peak power and the maximum demand reported, and achieving the purpose of reducing capacity electricity charges. Household photovoltaic storage can improve the level of self-generation and self-use of electricity. Due to high electricity prices and poor power supply stability, the demand for household photovoltaic installation is driven. Considering that photovoltaic power generation occurs during the day, while user loads are generally higher at night, deploying energy storage can better utilize photovoltaic power, increasing self-generation and self-consumption while reducing electricity costs. Furthermore, energy storage is required for backup power in areas such as communication base stations and data centers.

[0069] In some embodiments, see Figure 1 , Figure 1 is a structural diagram of an energy storage system according to an embodiment of the present application, and Figure 1 The shared energy storage scenario on the power generation / distribution side is used as an example for illustration. The energy storage device of this application is not limited to the energy storage scenario on the power generation / distribution side.

[0070] The present application provides an energy storage system, which includes: a high-voltage cable 2, a first electric energy conversion device 3, a second electric energy conversion device 4 and an energy storage device 1 provided by the present application. In some embodiments of the power generation side scenario, the second electric energy conversion device 4 can be a wind power conversion device. Since the electric energy generated by wind power conversion is volatile, random and intermittent, the unstable electric energy output by the wind power conversion device can be first stored in the energy storage device 1 by connecting to the grid. The energy storage device 1 is connected to the high-voltage cable 2 and outputs smooth electric energy to the power distribution network for use, thereby realizing peak and frequency regulation and stable operation of the power grid; or, the wind power conversion The device is always connected to the high-voltage cable 2. Under normal power generation conditions, the electric energy output by the wind power conversion device is supplied to the power distribution network through the high-voltage cable. When the current power load is low and the wind power conversion device generates excess power, the excess power is first stored in the energy storage device 1 to improve the problem of new energy power generation and consumption. When the power load is high, the power grid issues an instruction to use the power stored in the energy storage device 1 in conjunction with the high-voltage cable 2 in a grid-connected mode to transmit the power to the power consumption side, providing peak-shaving, frequency regulation, standby and other services for the power grid operation, giving full play to the peak-shaving role of the power grid, promoting peak-shaving and valley-filling of the power grid, and alleviating the power supply pressure of the power grid.

[0071] In some embodiments on the distribution network side, the first power conversion device 3 can be a photovoltaic power conversion device, and the energy storage device 1 is connected to the high-voltage cable 2 and installed between the downstream of the high-voltage cable 2 and the user load. The electric energy output by the photovoltaic power conversion device is stored in the energy storage device 1, which responds promptly to act as a backup power supply when a fault occurs in the power grid / distribution network; or, it can alleviate line congestion when a line congestion occurs in the high-voltage cable 2 transmission line, and provide power supply support when the power grid is planned to be expanded to delay the economic pressure caused by the expansion of the power grid / distribution network.

[0072] Optionally, the first electric energy conversion device 3 may include but is not limited to a wind power conversion device, and the second electric energy conversion device 4 may include but is not limited to a photovoltaic power conversion device. The first electric energy conversion device 3 and the second electric energy conversion device 4 can convert at least one of solar energy, light energy, wind energy, thermal energy, tidal energy, biomass energy and mechanical energy into electric energy.

[0073] Optionally, the energy storage device 1 may include but is not limited to energy storage application scenarios such as energy storage power stations, hydropower / thermal / wind power generation systems, solar power generation systems, mobile power systems, smart home systems or temporary power supply systems, and is also used in data centers, military equipment, aerospace, charging piles, electric vehicles and other fields.

[0074] Optionally, the energy storage device 1 may include, but is not limited to, a battery pack, a battery cluster, a mobile power supply, an energy storage cabinet / container, and other battery integrated systems. The energy storage device 1 provided in the embodiments of this application may be applied in practical applications such as, but not limited to, the products listed above. Other application forms are also possible, and the embodiments of this application do not impose strict restrictions on the application form of the energy storage device 1.

[0075] like Figure 2 As shown, the battery pack includes a housing 100, a battery module 200, and a wiring harness sampling assembly 300. The housing 100 includes a first housing 110 and a second housing 120. The first housing 110 and the second housing 120 are connected to form a cavity. The battery module 200 and the wiring harness sampling assembly 300 are located in the cavity. The wiring harness sampling assembly 300 is located on one side of the battery module 200 and is used to collect the voltage and / or temperature of the single cells in the battery module 200.

[0076] In one embodiment, the battery module 200 and the wiring harness sampling assembly 300 are arranged along the Z-axis direction, and the wiring harness sampling assembly 300 is located above the battery module 200 along the Z-axis direction.

[0077] There may be one or more battery modules 200 and one or more wiring harness sampling components 300. The number of battery modules 200 and the number of wiring harness sampling components 300 may be the same or different.

[0078] For example, in the embodiment of the present application, the number of battery modules 200 and the number of wiring harness sampling components 300 are both four. The four battery modules 200 are arranged in an array. Specifically, the four battery modules 200 are a first battery module 200a, a second battery module 200b, a third battery module 200c, and a fourth battery module 200d. The first battery module 200a and the second battery module 200b are arranged along the Y-axis direction, and the first battery module 200a is located in front of the second battery module 200b along the Y-axis direction. The first battery module 200a and the third battery module 200c are arranged along the X-axis direction, and the first battery module 200a is located on the left side of the third battery module 200c along the X-axis direction. The third battery module 200c and the fourth battery module 200d are arranged along the Y-axis direction, and the third battery module 200c is located in front of the fourth battery module 200d along the Y-axis direction. The second battery module 200b and the fourth battery module 200d are arranged along the X-axis direction, and the second battery module 200b is located on the left side of the fourth battery module 200d along the X-axis direction.

[0079] The four wire harness sampling components 300 are arranged in an array, and the four wire harness sampling components 300 are respectively the first wire harness sampling component 300a, the second wire harness sampling component 300b, the third wire harness sampling component 300c and the fourth wire harness sampling component 300d. The first wire harness sampling component 300a is located above the first battery module 200a along the Z-axis direction, the second wire harness sampling component 300b is located above the second battery module 200b along the Z-axis direction, the third wire harness sampling component 300c is located above the third battery module 200c along the Z-axis direction, and the fourth wire harness sampling component 300d is located above the fourth battery module 200d along the Z-axis direction.

[0080] Of course, in other embodiments, the number of wire harness sampling assemblies 300 may be less than the number of battery modules 200. For example, there are two wire harness sampling assemblies 300 and four battery modules 200, and one wire harness sampling assembly 300 corresponds to two battery modules 200.

[0081] In one embodiment, the wiring harness sampling assembly 300 is a CCS (Cell Connection System, integrated busbar).

[0082] Each battery module 200 includes multiple single cells 220 , which can be connected in series, parallel, or in a hybrid manner, where hybrid refers to a combination of series and parallel connections. The wiring harness sampling assembly 300 can collect the voltage and / or temperature of the single cells 220 .

[0083] When there are multiple battery modules 200 , the multiple battery modules 200 may also be connected in series, in parallel, or in a mixed manner.

[0084] Among them, the single battery 220 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc.

[0085] The inventors of this application discovered that when a single cell 220 in a battery module 200 within a battery pack experiences thermal runaway, the high-temperature, high-pressure fluid ejected from that cell 220 can splash onto the circuit board of the wiring harness sampling assembly, burning through the wiring harness and causing a short circuit. When a circuit board short circuits, the remaining single cells 220 are also susceptible to thermal runaway, triggering a chain reaction that ultimately leads to thermal runaway of the entire battery pack.

[0086] In order to solve the above problems, the embodiment of the present application improves the structure of the wire harness sampling component 300. Figure 3 and Figure 4 As shown, the wiring harness sampling assembly 300 includes a carrier tray 310, a plurality of bus bars 330 and a collection assembly 320. The carrier tray 310 is made of an insulating material and is located above the corresponding battery module 200 along the Z-axis direction. In the embodiment of the present application, the carrier tray 310 is a roughly rectangular plate-shaped structure. The carrier tray 310 has a plurality of second mounting positions 313, and the plurality of bus bars 330 are respectively assembled on the plurality of second mounting positions 313 of the carrier tray 310 for connecting the plurality of single cells 220 of the battery module 200. The carrier tray 310 also has a first mounting position 311, and the collection assembly 320 includes a circuit board 321 assembled on the first mounting position 311 of the carrier tray 310 and a protective layer 322 covering the surface of the circuit board 321 facing away from the carrier tray 310.

[0087] In one embodiment, the protective layer 322 can be any one or a combination of the following: mica paper, aramid paper, and ceramic fiber paper.

[0088] In the embodiment of the present application, by covering the side of the circuit board 321 facing away from the carrier plate 310 with a protective layer 322, the high-temperature and high-pressure fluid ejected from a single battery 220 during thermal runaway can be prevented from directly splashing onto the circuit board 321. The protective layer 322 protects the circuit board 321, thereby preventing the wiring harness of the circuit board 321 from being burned through and causing a short circuit, preventing the remaining single batteries 220 from experiencing a chain reaction of thermal runaway, and improving the safety of the entire energy storage device 1.

[0089] The inventors of the present application further discovered during their research that if the protective layer 322 is bonded as a whole to the circuit board 321, the protective layer 322 will also bond the collection terminals of the circuit board 321. When the single battery 220 expands, since the protective layer 322 bonds the collection terminals, the protective layer 322 will affect the elasticity of the collection terminals, thereby causing the collection terminals to be unable to adapt to the expansion and deformation of the single battery 220. However, if the protective layer 322 is spread flat on the upper surface of the circuit board 321 without being glued, the protective layer 322 will easily fall off the circuit board 321, thereby losing its function of protecting the circuit board 321.

[0090] In order to solve the above problems, the embodiment of the present application improves the connection method between the protective layer 322 and the circuit board 321. Figure 5 and Figure 6 As shown, the circuit board 321 includes a board body 327 and multiple current collection terminals 323 connected to the board body 327. The ends of the multiple current collection terminals 323 are electrically connected to multiple busbars 330. The protective layer 322 includes a first protective portion 3221 and a second protective portion 3222. The first protective portion 3221 has an adhesive layer 324 on the side facing the circuit board 321. The adhesive layer 324 is connected between the first protective portion 3221 and the board body 327. The second protective portion 3222 has an exposed surface 3225 on the side facing the circuit board 321, which covers at least a portion of the current collection terminals 323.

[0091] In the embodiment of the present application, the protective layer 322 is designed in sections, that is, the surface of the first protective portion 3221 facing the circuit board 321 is provided with a backing layer 324, while the surface of the second protective portion 3222 facing the circuit board 321 is an exposed surface 3225 and is not provided with the backing layer 324. The first protective portion 3221 is adhered to the board body 327 of the circuit board 321 via the backing layer 324, and the exposed surface 3225 covers at least a portion of the collection terminal 323. With this design, on the one hand, the first protective portion 3221 is bonded to the board body 327 by the adhesive layer 324, and the adhesive layer 324 avoids the collection terminals 323. This ensures the firm connection between the protective layer 322 and the circuit board 321 and prevents the protective layer 322 from falling off the circuit board 321, while also ensuring that the collection terminals 323 of the circuit board 321 have good elasticity after the single battery 220 expands. On the other hand, the exposed surface 3225 of the second protective portion 3222 only covers the collection terminals 323 but is not bonded to the collection terminals 323. The second protective portion 3222 improves the overall tearability of the protective layer 322. If the protective layer 322 is not properly pasted or the circuit board 321 needs to be inspected, the entire protective layer 322 can be torn off from the circuit board 321 along the second protective portion 3222. This operation is simple, and when the protective layer 322 is torn off from the circuit board 321, the wiring at the collection terminals 323 will not be pulled or damaged.

[0092] The “exposed surface” refers to the side of the second protection portion 3222 facing the circuit board 321 where the adhesive layer 324 is not provided, so that the second protection portion 3222 covers the circuit board 321 in a removable manner.

[0093] In one embodiment, the circuit board 321 is a flexible printed circuit (FPC). Of course, in other embodiments, the circuit board 321 may also be a rigid circuit board.

[0094] Please continue reading Figure 5 The circuit board 321 is in the shape of an elongated strip, and the multiple collection terminals 323 are located on the same long side of the circuit board 321. The protective layer 322 is in the shape of an elongated strip, and the first protective portion 3221 and the second protective portion 3222 are arranged along the width direction of the protective layer 322. The second protective portion 3222 covers at least a portion of each collection terminal 323 on the same long side of the circuit board 321.

[0095] In the embodiment of the present application, the first protective portion 3221 and the second protective portion 3222 of the protective layer 322 are arranged along the width direction of the protective layer 322. Since the protective layer 322 is in the shape of an elongated strip, the first protective portion 3221 and the second protective portion 3222 are both in the shape of an elongated strip. When there is an error in the pasting position of the protective layer 322 or the circuit board 321 needs to be checked, the operator can tear off the second protective portion 3222 on one side in the width direction of the protective layer 322, which further improves the tearability of the protective layer 322.

[0096] In another embodiment, the multiple collection terminals 323 may not all be located on the same long side of the circuit board 321, but rather may be provided on both long sides of the circuit board 321. In this case, the circuit board 321 spans the explosion-proof valves of the individual cells, and openings are provided on the circuit board 321 corresponding to the locations of the explosion-proof valves to ensure venting during pressure relief. The protective layer 322 may include a first protective portion 3221 and two second protective portions 3222. The first protective portion 3221 and the second protective portion 3222 are elongated, with the first protective portion 3221 connected between the two second protective portions 3222. The first protective portion 3221 has openings corresponding to the locations of the explosion-proof valves.

[0097] like Figure 5 As shown, the collection terminal 323 includes a collection arm 3231 and a conductive member 3232. The collection arm 3231 is connected to the plate body 327. One end of the conductive member 3232 is electrically connected to the collection arm 3231, and the other end is electrically connected to the bus 330. The second protective portion 3222 covers the entire collection arm 3231 and part of the conductive member 3232.

[0098] In one embodiment, the collection arm 3231 and the plate body 327 are an integrated structure, and the circuit on the plate body 327 extends to the collection arm 3231 .

[0099] In the embodiment of the present application, the second protective portion 3222 covers the entire collection arm 3231, so that the circuits on the collection arm 3231 are not exposed. The high-temperature and high-pressure fluid generated by thermal runaway of a single cell 220 will not directly splash onto the collection arm 3231, thereby preventing the collection arm 3231 from being burned through and causing a short circuit.

[0100] The inventors of this application further discovered during their research that the first protective portion 3221 of the protective layer 322 is provided with an adhesive layer 324. If the adhesive layer 324 is accidentally attached to the collection terminal 323 of the circuit board 321, when the single battery 220 undergoes thermal expansion, the collection terminal 323 on the circuit board 321 may be pulled, or even torn, causing poor collection and missed collection. Ultimately, it is impossible to monitor battery performance in real time, affecting the cycle life of the battery pack. Furthermore, if the incorrectly attached protective layer 322 is removed from the circuit board 321 and reattached, the collection terminal 323 can easily be pulled when the protective layer 322 is removed, damaging the wiring of the collection terminal 323. In this case, a new circuit board 321 will be required, which will have the negative impact of reduced production efficiency and increased costs.

[0101] In order to solve the above problems, the embodiment of the present application sets a foolproof mark on the protective layer 322. Figure 5 As shown, a first identification portion 3223 is provided on the side of the first protection portion 3221 facing away from the circuit board 321 , and a second identification portion 3224 is provided on the side of the second protection portion 3222 facing away from the circuit board 321 . The first identification portion 3223 is different from the second identification portion 3224 .

[0102] In the embodiment of the present application, the first identification portion 3223 and the second identification portion 3224 can serve as identification to avoid the problem that the elasticity of the collection terminal 323 is affected due to the first protective portion 3221 being pasted on the position of the collection terminal 323 of the circuit board 321, and the collection terminal 323 circuit is easily damaged when the protective layer 322 is torn off and re-applied.

[0103] In one embodiment, the first identification portion 3223 and the second identification portion 3224 can be non-contactly marked on the surface of the protective layer 322 using a laser beam, or can be screen-printed with high-temperature resistant ink or inkjet printed onto the surface of the protective layer 322. Of course, mechanical embossing can also be used to create indentations or protrusions on the surface of the protective layer 322.

[0104] It is understandable that the difference between the first identification portion 3223 and the second identification portion 3224 may be a difference in shape, a difference in color, or a difference in both shape and color, which is not limited in this application.

[0105] The inventors of the present application further discovered during their research that the protective layer 322 needs to cover the circuit board 321. However, if the protective layer 322 only covers the edge of the circuit board 321, since the circuit board 321 has a certain thickness, this will cause a gap to form between the protective layer 322 and the carrier plate 310, and the side edge of the circuit board 321 will be exposed through the gap. The high-temperature and high-pressure fluid generated by the thermal runaway of the single battery 220 will damage the exposed circuit board 321 through the gap, and then cause the high-temperature and high-pressure fluid to burn through the wiring harness of the circuit board 321 from the edge of the circuit board 321, causing a short circuit problem. Furthermore, after the battery module 200 has been in operation for a long time, the adhesive strength of the backing layer 324 will also decrease, causing the exposed area of ​​the circuit board 321 to gradually increase over time, and the possibility of being damaged by the high-temperature and high-pressure fluid caused by thermal runaway will gradually increase.

[0106] In order to solve the above problems, the embodiment of the present application enlarges the adhesive area of ​​the first protection portion 3221. Figure 5 As shown, the first protection portion 3221 is also connected to the carrier plate 310 via the adhesive layer 324. Furthermore, the collection terminal 323 is located on one long side of the circuit board 321, and a portion of the first protection portion 3221 extends beyond the edge of the other long side of the circuit board 321 and is adhesively bonded to the carrier plate 310.

[0107] In the embodiment of the present application, the first protective portion 3221 is not only connected to the circuit board 321 through the back adhesive layer 324, but the first protective portion 3221 also extends out from the side edge of the circuit board 321 and is glued to the carrier plate 310. On the one hand, the first protective portion 3221 covers the side edge of the circuit board 321, preventing the side edge of the circuit board 321 from being exposed, thereby ensuring the safety of the circuit board 321 during thermal runaway; on the other hand, the first protective portion 3221 is glued to the circuit board 321 and the carrier plate 310 at the same time, thereby improving the firmness of the bonding of the protective layer 322 and reducing the possibility of the circuit board 321 being damaged by the high-temperature and high-pressure fluid in thermal runaway.

[0108] like Figure 6 As shown, the protective layer 322 is in the shape of an elongated strip, and the first protective portion 3221 and the second protective portion 3222 are arranged along the width direction of the protective layer 322. The width of the first protective portion 3221 is W1, and the width of the second protective portion 3222 is W2, and 1 / 2≤W1 / W2≤3 / 4.

[0109] In the embodiment of the present application, W1 and W2 satisfy: 1 / 2≤W1 / W2≤3 / 4. On the one hand, it can avoid the separation of the protective layer 322 and the circuit board 321 caused by scratching during the production and assembly of the battery pack; on the other hand, after the battery module 200 has been in operation for a long time, the adhesive strength of the back glue of the protective layer 322 will also decrease. In order to ensure the expansion buffering of the position of the collection terminal 323 of the circuit board 321 and at the same time ensure the bonding stability of the protective layer 322 and the circuit board 321, the width of the back glue layer 324 of the protective layer 322 is designed to be 1 / 2≤W1 / W2≤3 / 4 to ensure the bonding strength between the back glue layer 324 and the circuit board 321.

[0110] like Figure 7 As shown, the first mounting position 311 has a first groove 3111; a first terminal assembly 301 is provided at one end of the circuit board 321, and at least a portion of the first terminal assembly 301 is located in the first groove 3111; one of the multiple busbars 330 is a first output busbar 330a, and an end of one of the collection terminals 323 is electrically connected to the first output busbar 330a; a surface on one side of the first output busbar 330a facing away from the carrier plate 310 is flush with a surface on the side of the circuit board 321 facing away from the carrier plate 310.

[0111] In the embodiment of the present application, at least a portion of the first terminal assembly 301 at one end of the circuit board 321 is accommodated in the first groove 3111 of the carrier plate 310, so that the surface of the first output bus 330a facing away from the carrier plate 310 is flush with the surface of the circuit board 321 facing away from the carrier plate 310, thereby avoiding a height difference between the upper surface of the first output bus 330a and the upper surface of the circuit board 321. In this way, it is ensured that the collection terminal 323 can be stably connected to the first output bus 330a in a straight posture, thereby ensuring the stability of the connection between the collection terminal 323 and the first output bus 330a.

[0112] Continue reading Figure 7 The first terminal assembly 301 includes a first connector 3011 and a first mounting base 3012. The first connector 3011 is fixedly connected to a surface of the circuit board 321 facing away from the carrier plate 310. The first mounting base 3012 is fixedly connected to a surface of the circuit board 321 facing the carrier plate 310. At least a portion of the first mounting base 3012 is located within the first groove 3111. The first mounting base 3012 is also fixedly connected to the bottom wall of the first groove 3111.

[0113] In one embodiment, the first mounting base 3012 is a flat plate structure.

[0114] In one embodiment, a first connection portion 3112 is protruded from the bottom surface of the first groove 3111 . The first mounting seat 3012 has a first through-hole 3013 extending therethrough. The first connection portion 3112 is inserted into the first through-hole 3013 .

[0115] like Figures 8 to 10 As shown, a first end plate 211 is provided on the side of the first battery module 200a facing the second battery module 200b, and a second end plate 212 is provided on the side of the second battery module 200b facing the first battery module 200a. The circuit board 321 of the second wiring harness sampling assembly 300b has an extension section 326 extending from the periphery of the carrier plate 310. The extension section 326 spans the first end plate 211 and the second end plate 212 and is electrically connected to the circuit board 321 of the first wiring harness sampling assembly 300a. An insulating layer 325 is provided on the side of the extension section 326 facing the first and second end plates 211 and 212. A first protective portion 3221 is glued to a portion of the extension section 326, and the exposed surface of the second protective portion 3222 covers at least a portion of the extension section 326.

[0116] Since the protruding section 326 of the circuit board 321 of the second wiring harness sampling component 300b needs to cross the first end plate 211 and the second end plate 212 and then be electrically connected to the circuit board 321 of the first wiring harness sampling component 300a, arcing and fire are likely to occur between the protruding section 326 and the first end plate 211 and the second end plate 212, and the protruding section 326 is likely to sag under the action of its own gravity, causing the protruding section 326 to rub against the edge of the supporting plate 310, thereby causing wear of the protruding section 326 and even damage to the circuits within the protruding section 326.

[0117] In the embodiment of the present application, an insulating layer 325 is provided on the side of the protruding section 326 facing the first end plate 211 and the second end plate 212. On the one hand, the insulating layer 325 enhances the insulation performance of the protruding section 326, ensuring that there is sufficient electrical clearance between the protruding section 326 and the first end plate 211 and the second end plate 212, thereby avoiding arcing and fire problems; on the other hand, the insulating layer 325 enhances the rigidity of the protruding section 326, and to a certain extent reduces the extent of the protruding section 326 sagging due to its own gravity, thereby reducing the risk of the protruding section 326 wearing out or even damaging the circuit due to friction between the protruding section 326 and the edge of the carrier plate 310.

[0118] like Figures 8 to 10 As shown, a second terminal assembly 302 is provided at the end of the extension section 326. The second terminal assembly 302 is electrically connected to the circuit within the extension section 326. The second terminal assembly 302 is electrically connected to the circuit board 321 of the first wiring harness sampling assembly 300a. The insulating layer 325 extends from the carrier plate 310 of the second wiring harness sampling assembly 300b to the second terminal assembly 302.

[0119] In the embodiment of the present application, the insulating layer 325 extends from the carrier plate 310 of the second wiring harness sampling assembly 300b to the second terminal assembly 302. The insulating layer 325 basically covers the entire extension section 326, which ensures that there is sufficient electrical clearance between the extension section 326 and the first end plate 211 and the second end plate 212, and improves the overall rigidity of the extension section 326.

[0120] In one embodiment, if Figures 8 to 10 As shown, the second terminal assembly 302 includes a second mounting seat 3021 and a second connector 3022. The second mounting seat 3021 is fixed to the side of the extension section 326 facing the first end plate 211 and the second end plate 212. The second connector 3022 is fixed to the side of the extension section 326 facing away from the first end plate 211 and the second end plate 212. The second connector 3022 is electrically connected to the circuit board 321 of the first wiring harness sampling assembly 300a; the insulating layer 325 extends from the supporting plate 310 of the second wiring harness sampling assembly 300b to the second mounting seat 3021.

[0121] The area of ​​the surface of the extension section 326 facing away from the first end plate 211 and the second end plate 212 in the height direction (Z-axis direction) of the battery module 200 corresponding to the second mounting seat 3021 is the bonding area 3261. At least a portion of the bonding area 3261 is glued to the first protective portion 3221 of the second wiring harness sampling assembly 300b.

[0122] In the embodiment of the present application, the first protective portion 3221 of the protective layer 322 is connected to the bonding area 3261, so that the protective layer 322 can provide a certain pulling force to the protruding section 326. The pulling force can reduce the downward bending angle of the protruding section 326 to a certain extent. On the one hand, it prevents the protruding section 326 from bending downward at too large an angle under the action of the gravity of the second terminal assembly 302, thereby preventing stress concentration at the bending position, thereby preventing damage to the substrate of the circuit board 321 and damage to the internal circuit of the circuit board 321; on the other hand, under the action of tension, the protective layer 322 is not easy to bend downward at a large angle with the protruding section 326, thereby preventing the protective layer 322 from generating creases and wrinkles at the bending position, and avoiding poor adhesion between the first protective portion 3221 of the protective layer 322 and the circuit board 321, thereby preventing thermal runaway fluid from easily flowing into the circuit board 321 from the gap, causing the circuit board 321 to burn through and be damaged.

[0123] like Figure 9 As shown, the carrier tray 310 of the second wiring harness sampling assembly 300b has a second connecting portion 312. The second connecting portion 312 is adjacent to the extension 326 and is fixedly connected to the circuit board 321 of the second wiring harness sampling assembly 300b. The carrier tray 310 of the second wiring harness sampling assembly 300b has multiple second connecting portions 312 arranged along the width direction of the battery module 200.

[0124] If the first battery module 200a and the second battery module 200b are misaligned along the Y-axis, and the extension 326 needs to be electrically connected to the circuit board 321 of the first wiring harness sampling assembly 300a, the circuit board 321 will be twisted. If the circuit board 321 is in a twisted position for a long time, stress concentration will occur on the circuit board 321, which may damage the substrate and circuitry of the circuit board 321.

[0125] In the embodiment of the present application, the carrier plate 310 of the second wiring harness sampling component 300b is provided with a plurality of second connecting portions 312, and the second connecting portions 312 are adjacent to the extension section 326. When the second terminal component 302 at the end of the extension section 326 is connected to the circuit board 321 of the first wiring harness sampling component 300a, the plurality of second connecting portions 312 can fix the circuit board 321 on the carrier plate 310 as much as possible, preventing the circuit board 321 from twisting, and avoiding stress concentration on the circuit board 321 due to twisting, which may cause damage to the substrate and circuit of the circuit board 321.

[0126] In one embodiment, the circuit board 321 has a penetrating second through-hole 3211 , and the second connecting portion 312 is disposed in the second through-hole 3211 .

[0127] like Figure 4 As shown, two of the plurality of busbars 330 in the wiring harness sampling assembly 300 are first output busbar 330a and second output busbar 330b. Two of the plurality of second mounting locations 313 on the carrier tray 310 are lead-out mounting locations 313a, and the two lead-out mounting locations 313a have different shapes and / or sizes. The first output busbar 330a and the second output busbar 330b are mounted on the two lead-out mounting locations 313a, respectively.

[0128] In the embodiment of the present application, by distinguishing the lead-out mounting positions 313a of different shapes and / or sizes, the installation direction of the harness sampling component 300 can be determined. For example, the first output bus 330a corresponds to the positive pole of the battery module, and the second output bus 330b corresponds to the negative pole of the battery module. The two lead-out mounting positions 313a have different shapes and / or sizes, which can play a fool-proof role and avoid the wrong assembly direction of the harness sampling component 300.

[0129] In one embodiment, the two lead-out installation positions 313 a are grooves, and the first output bus bar 330 a and the second output bus bar 330 b are installed in the two grooves respectively.

[0130] like Figure 11 As shown, the present application further provides an electrical device 5 , comprising the energy storage device 1 of any of the above embodiments, and the energy storage device 1 is used to supply power to the electrical device 5 .

[0131] It is understandable that the various embodiments / implementations provided in this application can be combined with each other without causing any contradiction, and they will not be illustrated one by one here.

[0132] In the application examples, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the application examples can be understood according to the specific circumstances.

[0133] In the description of the application embodiments, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the application embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the application embodiments.

[0134] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the claimed invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0135] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A wire harness sampling assembly, characterized in that: include: Carrying tray; A plurality of bus bars are assembled on the carrier plate; as well as The acquisition component includes a circuit board assembled on the carrier plate and a protective layer covering the surface of the circuit board facing away from the carrier plate. The circuit board includes a board body and a plurality of acquisition terminals connected to the board body. The ends of the plurality of acquisition terminals are electrically connected to the plurality of bus bars, respectively. The protective layer includes a first protective portion and a second protective portion connected to each other. The first protective portion has a backing adhesive layer on the side facing the circuit board, and the backing adhesive layer is connected between the first protective portion and the board body. The surface of the second protective portion facing the circuit board is an exposed surface, and the exposed surface covers at least part of the acquisition terminals.

2. The wire harness sampling assembly according to claim 1, characterized in that: The circuit board is in the shape of an elongated strip, and the plurality of acquisition terminals are located on the same long side of the circuit board; The protective layer is in a long strip shape, the first protective portion and the second protective portion are arranged along the width direction of the protective layer, and the second protective portion covers at least a portion of each of the collecting terminals on the same long side of the circuit board.

3. The wire harness sampling assembly according to claim 1, characterized in that: The first protection portion is also connected to the carrying plate through the adhesive layer.

4. The wire harness sampling assembly according to claim 3, characterized in that: The circuit board is in an elongated strip shape, the collecting terminal is located on one of the long sides of the circuit board, and a portion of the first protective portion extends out of the edge of the other long side of the circuit board and is glued to the carrying plate.

5. The wire harness sampling assembly according to claim 1, characterized in that: The protective layer is in the shape of an elongated strip. The first protective portion and the second protective portion are arranged along the width direction of the protective layer. The width of the first protective portion is W1, the width of the second protective portion is W2, and 1 / 2≤W1 / W2≤3 / 4.

6. The wire harness sampling assembly according to claim 1, characterized in that: The carrier tray has a first mounting position, the circuit board is assembled in the first mounting position, and the first mounting position has a first groove; a first terminal assembly is provided at one end of the circuit board, and at least a portion of the first terminal assembly is located in the first groove; One of the multiple busbars is an output busbar, and an end of one of the collection terminals is electrically connected to the output busbar; a surface of the output busbar facing away from the carrier plate is flush with a surface of the circuit board facing away from the carrier plate.

7. The wire harness sampling assembly according to claim 6, characterized in that: The first terminal assembly includes a first connector and a first mounting seat. The first connector is fixed to the side surface of the circuit board facing away from the carrier plate. The first mounting seat is fixed to the side surface of the circuit board facing the carrier plate. At least a portion of the first mounting seat is located in the first groove.

8. The wire harness sampling assembly according to claim 7, characterized in that: The first mounting seat is also fixedly connected to the bottom wall of the first groove.

9. The wire harness sampling assembly according to claim 8, characterized in that: A first connecting portion is protruded from the bottom surface of the first groove, and the first mounting seat has a first through-hole extending therethrough, and the first connecting portion is inserted into the first through-hole.

10. The wire harness sampling assembly according to claim 1, characterized in that: A first identification portion is provided on a side of the first protection portion facing away from the circuit board, and a second identification portion is provided on a side of the second protection portion facing away from the circuit board. The first identification portion is different from the second identification portion.

11. The wire harness sampling assembly according to claim 1, characterized in that: The collection terminal includes a collection arm and a conductive member, the collection arm is connected to the plate body, one end of the conductive member is electrically connected to the collection arm, and the other end is electrically connected to the bus, and the second protective portion covers the entire collection arm and part of the conductive member.

12. An energy storage device, characterized in that: The invention comprises the wire harness sampling assembly according to any one of claims 1 to 11.

13. The energy storage device according to claim 12, characterized in that: The energy storage device further includes a plurality of battery modules, the plurality of battery modules including a first battery module and a second battery module, the first battery module and the second battery module are arranged along the length direction of the battery module, a first end plate is provided on a side of the first battery module facing the second battery module, and a second end plate is provided on a side of the second battery module facing the first battery module; The energy storage device includes a plurality of wire harness sampling assemblies, the plurality of wire harness sampling assemblies including a first wire harness sampling assembly and a second wire harness sampling assembly, the first wire harness sampling assembly corresponding to the first battery module, the second wire harness sampling assembly corresponding to the second battery module, and a circuit board of the second wire harness sampling assembly having an extended section extending from a periphery of a carrier plate, the extended section spanning the first end plate and the second end plate and electrically connected to the circuit board of the first wire harness sampling assembly; An insulating layer is provided on one side of the protruding section facing the first end plate and the second end plate, the first protective portion is glued to a portion of the protruding section, and an exposed surface of the second protective portion covers at least a portion of the protruding section.

14. The energy storage device according to claim 13, characterized in that A second terminal assembly is provided at the end of the extended section, and the second terminal assembly is electrically connected to the circuit board of the first wiring harness sampling assembly; the insulating layer extends from the carrying plate of the second wiring harness sampling assembly to the second terminal assembly.

15. The energy storage device according to claim 14, characterized in that: The second terminal assembly includes a second mounting seat and a second connector, the second mounting seat is fixedly connected to the side of the protruding section facing the first end plate and the second end plate, the second connector is fixedly connected to the side of the protruding section facing away from the first end plate and the second end plate, and the second connector is electrically connected to the circuit board of the first wiring harness sampling assembly; the insulating layer extends from the supporting plate of the second wiring harness sampling assembly to the second mounting seat.

16. The energy storage device according to claim 15, characterized in that The area of ​​the side surface of the extending section facing away from the first end plate and the second end plate corresponding to the second mounting seat in the height direction of the battery module is a bonding area, and at least a portion of the bonding area is glued to the first protective portion of the second wiring harness sampling assembly.

17. The energy storage device according to claim 13, characterized in that The carrying plate of the second wire harness sampling component has a second connecting portion, which is adjacent to the protruding section and fixedly connected to the circuit board of the second wire harness sampling component.

18. The energy storage device according to claim 17, characterized in that The carrying plate of the second wire harness sampling assembly has a plurality of second connecting portions, and the plurality of second connecting portions are arranged along a width direction of the battery module.

19. An electrical device, characterized in that: The energy storage device comprises the energy storage device according to any one of claims 12 to 18, wherein the energy storage device is used to supply power to electrical equipment.

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