Energy storage devices and electrical equipment

Abstract

The present application relates to the field of energy storage technology and discloses an energy storage device and electrical equipment. The energy storage device includes a battery module, a wiring harness sampling assembly, and a conductive member. The wiring harness sampling assembly is arranged on one side of the battery module. The wiring harness sampling assembly includes a carrier plate and a plurality of busbars. The carrier plate is made of an insulating material and has a plurality of first mounting positions. The plurality of busbars are respectively assembled in the plurality of first mounting positions. One of the busbars is a lead-out busbar. The first mounting position corresponding to the lead-out busbar is a lead-out mounting position. The lead-out mounting position has an extension portion. The extension portion and the end plate of the battery module each have a first overlapping area in their orthographic projection on a first target plane. The first target plane is perpendicular to the height direction of the battery module. The conductive member has a first connecting portion electrically connected to the lead-out busbar. The first connecting portion is located on the side of the extending portion facing away from the end plate. Along the height direction of the battery module, the outer periphery of the portion corresponding to the first connecting portion and the extending portion is covered with an insulating layer.

Description

Technical Field

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

[0002] The battery pack includes multiple battery modules and multiple CCS (Cell Connection System) components located on one side of the multiple battery modules. Each CCS component includes multiple busbars, which are electrically connected to the multiple single cells in the corresponding battery module, thereby connecting the multiple single cells in a battery module in series.

[0003] In the prior art, at least one of the multiple busbars in each CCS assembly serves as a lead-out busbar. This lead-out busbar is electrically connected to the busbars of the remaining CCS assemblies or the total positive / negative output terminals of the battery pack via conductive members. However, the connection structure between the lead-out busbars and the conductive members in the prior art battery pack is not sufficiently simplified, resulting in poor assembly precision and low assembly efficiency. Summary of the Invention

[0004] The embodiments of the present application provide an energy storage device and an electrical device to solve the problems existing in the related art.

[0005] The energy storage device of the embodiment of the present application includes:

[0006] Battery modules, including end plates;

[0007] a wire harness sampling assembly, disposed on one side of the battery module, comprising a carrier tray and a plurality of busbars, the carrier tray being made of an insulating material and having a plurality of first mounting positions, the plurality of busbars being respectively assembled in the plurality of first mounting positions, at least one of the plurality of busbars being a lead-out busbar, the first mounting position corresponding to the lead-out busbar being a lead-out mounting position, the lead-out mounting position having an extension, the orthographic projections of the extension and the end plate on a first target plane each having a first overlapping area, the first target plane being perpendicular to the height direction of the battery module; and

[0008] The conductive part has a first connecting portion, which is electrically connected to the lead-out bus and is located on the side of the protruding portion facing away from the end plate; along the height direction of the battery module, the outer periphery of the portion of the first connecting portion corresponding to the protruding portion is covered with an insulating layer.

[0009] Compared to the related art method of using an insulating seat to assemble the conductive parts and the lead-out bus, the energy storage device of the embodiment of the present application has the lead-out mounting position of the carrier plate extending outward to form a protrusion. The first connection portion of the conductive part is located on the side of the protrusion facing away from the end plate and is electrically connected to the lead-out bus. This ensures that the conductive part and the lead-out bus are connected and that there is sufficient electrical clearance between the end plate and the conductive part. The energy storage device of the embodiment of the present application omits the insulating seat when assembling the conductive parts and the lead-out bus. As a result, the assembly efficiency of the conductive parts and the lead-out bus is higher and the assembly precision is easier to control, thereby improving the yield rate and production efficiency.

[0010] According to some embodiments of the present application, a protrusion is provided on a side of the lead-out bus bar facing away from the battery module, the first connecting portion has a first through hole extending therethrough, and the protrusion is inserted into the first through hole.

[0011] In the embodiment of the present application, when assembling the conductive member and the lead-out busbar, the protrusion can pass through the first through hole, thereby achieving pre-positioning of the conductive member and improving assembly accuracy.

[0012] According to some embodiments of the present application, the supporting plate is a rectangular plate structure, and at least one long side of the supporting plate is provided with a flange. There is a second overlapping area between the flange and the orthographic projection of each of the battery modules on the second target plane, and the second target plane is perpendicular to the width direction of the battery module.

[0013] In the embodiments of the present application, on the one hand, the flange can improve the insulation between battery modules and enhance electrical safety; on the other hand, when assembling the wiring harness sampling assembly and the battery module, the flange can provide pre-positioning for the wiring harness sampling assembly to a certain extent, ensuring the installation accuracy of the wiring harness sampling assembly; on the other hand, the flange can also avoid the risk of short circuit caused by scratches on the insulating film of the single cell when the adjacent battery modules are put into the box; finally, the flange can also enhance the strength of the carrier plate, which not only avoids the bending of the carrier plate, but also avoids the problem of bending damage to the circuit board and poor contact between the collection terminal and the bus.

[0014] According to some embodiments of the present application, a first limiting portion is protruded from a surface of the flange facing the battery module, and a third overlapping area exists between the first limiting portion and the orthographic projection of each of the battery modules on the second target plane.

[0015] In an embodiment of the present application, a first limiting portion is convexly provided on the inner side surface of the flange, and the first limiting portion can limit the wire harness sampling assembly in the X-axis direction, so that after the wire harness sampling assembly is installed above the battery module, the multiple buses of the wire harness sampling assembly can be aligned with the poles of the multiple single cells of the battery module, ensuring the welding quality of the bus and the poles.

[0016] According to some embodiments of the present application, the flange is provided with two first limiting portions, and the two first limiting portions are respectively close to the two end portions of the flange along the length direction of the battery module.

[0017] In an embodiment of the present application, two first limiting portions are arranged at the two end portions in the length direction close to the flange. In addition to limiting the wiring harness sampling component, the first limiting portion can also increase the structural strength of the flange, thereby preventing the insulating film on the cable tie of the adjacent battery module from being scratched due to the warping of the flange, thereby improving electrical safety.

[0018] According to some embodiments of the present application, the first limiting portion has a guiding slope that is arranged obliquely relative to the height direction of the battery module, and the guiding slope extends from the inner side surface of the flange toward the direction close to the battery module.

[0019] In an embodiment of the present application, the first limiting portion has a guiding slope. When the wire harness sampling assembly is assembled with the battery module, if the wire harness sampling assembly is slightly misaligned relative to the battery module in the X-axis direction, the guiding slope can calibrate the position of the carrier plate so that the top of the battery module can be quickly inserted between the two flanged first limiting portions, thereby improving assembly efficiency.

[0020] According to some embodiments of the present application, the carrier plate is further provided with a plurality of third through holes extending therethrough, the battery module further comprises a plurality of single cells, the single cells have a first explosion-proof valve, and the positions of the first explosion-proof valves of the plurality of single cells respectively correspond to the positions of the plurality of third through holes.

[0021] In the embodiment of the present application, the carrier plate has third through holes at positions corresponding to the first explosion-proof valves of the plurality of single cells, ensuring that when the first explosion-proof valves explode, the gas in the single cells can be safely discharged through the third through holes.

[0022] According to some embodiments of the present application, two ridges are further provided on a surface of the carrier plate facing away from the battery module, wherein the length directions of the two ridges are parallel to the length direction of the battery module, and the two ridges are arranged side by side along the width direction of the battery module; the orthographic projection of the first explosion-proof valve on a first target plane is a first projection, the orthographic projection of the ridges on the first target plane is a second projection, each of the first projections is located between two of the second projections, and the first target plane is perpendicular to the height direction of the battery module;

[0023] The energy storage device also includes an upper cover and a base, the upper cover and the base are connected to form a cavity for accommodating the battery module and the wiring harness sampling assembly, the upper cover, the two ridges and the carrying plate form an exhaust channel, and one of the upper cover and the base has a front panel, which is located at one end of the exhaust channel along the length direction of the battery module, and a second explosion-proof valve is provided on the front panel.

[0024] In the embodiment of the present application, the upper cover, the two protrusions and the supporting plate form an exhaust channel. When a single cell experiences thermal runaway, the gas in the single cell can break through the first explosion-proof valve and flow rapidly along the exhaust channel and gather toward the front panel, thereby speeding up the timeliness of opening the second explosion-proof valve, avoiding the battery pack explosion caused by the failure to open the second explosion-proof valve in time, and improving the safety of the battery pack.

[0025] According to some embodiments of the present application, the wiring harness sampling assembly further includes two circuit boards assembled on the carrier plate, respectively located on one side of the two protrusions close to the bus, and the height of the protrusions is greater than the thickness of the circuit boards.

[0026] In the embodiment of the present application, the height of the ridge is greater than the thickness of the circuit board. When a single cell experiences thermal runaway and ejects gas and particulate matter outward, the ridge can block the gas and particulate matter from spreading toward the circuit board, thereby preventing the thermal runaway gas and particulate matter from contaminating the circuit board and preventing the circuit board from short-circuiting.

[0027] According to some embodiments of the present application, the carrier plate further has a second mounting position, and the second mounting position has a second groove;

[0028] The wiring harness sampling assembly further includes a circuit board assembled in the second mounting position, one end of the circuit board is provided with a terminal assembly, and at least a portion of the terminal assembly is located in the second groove;

[0029] The circuit board also has a plurality of collecting terminals, wherein the end of one of the collecting terminals is electrically connected to the busbar adjacent to the terminal assembly among the plurality of busbars, and the surface of the busbar facing away from the battery module is flush with the surface of the circuit board facing away from the battery module.

[0030] In an embodiment of the present application, at least a portion of the terminal assembly at one end of the circuit board is accommodated in the second groove so that the surface of the busbar facing away from the battery module is flush with the surface of the circuit board facing away from the battery module, avoiding a height difference between the upper surface of the busbar and the upper surface of the circuit board. This ensures that the collection terminal can be stably connected to the busbar in a straight posture, thereby ensuring the stability of the connection between the collection terminal and the busbar.

[0031] According to some embodiments of the present application, the terminal assembly includes a connector and a mounting seat, the connector is fixed to the side surface of the circuit board facing away from the battery module, the mounting seat is fixed to the side surface of the circuit board facing the battery module, and at least a portion of the mounting seat is located in the second groove.

[0032] According to some embodiments of the present application, the mounting seat is also fixedly connected to the bottom wall of the second groove.

[0033] According to some embodiments of the present application, a second connecting portion is convexly provided on the bottom surface of the second groove, the mounting seat has a fourth through hole extending therethrough, and the second connecting portion is passed through the fourth through hole.

[0034] According to some embodiments of the present application, the energy storage device further includes a base and a second locking member, the end plate has a second through hole, the second through hole passes through the end plate along the height direction of the battery module, and the second locking member is disposed in the second through hole and locks the end plate to the base;

[0035] The protruding portion has a first avoidance gap on one side along the width direction of the battery module; along the height direction of the battery module, the second locking member is exposed on the side surface of the carrier plate facing away from the battery module through the first avoidance gap.

[0036] In an embodiment of the present application, one side of the extension portion has a first avoidance gap, and the first avoidance gap allows the second locking member to pass through to lock the end plate and the base, ensuring that the battery module and the wiring harness sampling assembly are pre-fixed in the box.

[0037] According to some embodiments of the present application, the protruding portion has a second avoidance gap on the other side along the width direction of the battery module.

[0038] In the embodiment of the present application, the second avoidance gap is used to avoid the connection terminal of the wire harness when the wire harness of the wire harness sampling component is connected.

[0039] According to some embodiments of the present application, the first mounting position is a first groove, which is recessed inward along the height direction of the battery module from the side surface of the supporting plate facing away from the battery module, and the plurality of bus bars are respectively assembled in the plurality of the first grooves.

[0040] According to some embodiments of the present application, a second limiting portion is protruded from the side wall of the first groove, and a fourth overlapping area exists between the orthographic projections of the second limiting portion and the busbar on the first target plane.

[0041] In the embodiment of the present application, the second limiting portion can limit the busbar in the height direction of the battery module to prevent the busbar from falling out of the first groove before the busbar and the carrier plate are completely fixed.

[0042] According to some embodiments of the present application, a positioning column is protruded from the bottom wall of the first groove, the busbar has a positioning hole, and the positioning column is inserted into the positioning hole.

[0043] 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

[0044] 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.

[0045] Figure 1 This is a schematic diagram of an energy storage system.

[0046] Figure 2 It is a schematic diagram of an exploded view of the energy storage device according to an embodiment of the present application.

[0047] Figure 3 It is a three-dimensional schematic diagram of a wire harness sampling component according to an embodiment of the present application.

[0048] Figure 4 yes Figure 3 Schematic diagram of the decomposition.

[0049] Figure 5 This is a schematic diagram of the conductive member and the lead busbar being locked together by the first locking member.

[0050] Figure 6 This is an exploded diagram of the first locking component, conductive component, lead bus, carrier plate, and battery module.

[0051] Figure 7 It is a three-dimensional schematic diagram of the carrier plate.

[0052] Figure 8 yes Figure 7 A partial enlarged view of the X in the middle.

[0053] Figure 9 This is a partial schematic diagram of the wiring harness sampling component, battery module and base after assembly.

[0054] Figure 10 It is a schematic diagram showing that at least part of the terminal assembly is located in the second groove.

[0055] Figure 11 It is a schematic diagram of an electrical device.

[0056] The description of the accompanying drawings is as follows:

[0057] 100, box body; 110, upper cover; 120, base; 121, front panel; 1211, second explosion-proof valve;

[0058] 200, battery module; 200a, first battery module; 200b, second battery module; 200c, third battery module; 200d, fourth battery module; 210, end plate; 211, second through hole; 220, single battery; 221, first explosion-proof valve;

[0059] 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, terminal assembly; 3011, connector; 3012, mounting seat; 3013, fourth through hole; 310, carrier plate; 3101, first identification portion; 3102, second identification portion; 311, first mounting position; 3111, first groove; 3112, second limiting portion; 3113, positioning column; 3 12. Lead-out mounting position; 313. Extension portion; 3141. First avoidance notch; 3142. Second avoidance notch; 315. Flanged edge; 3151. First limiting portion; 3152. Guide slope; 316. Raised strip; 317. Exhaust channel; 318. Third through hole; 319. Second mounting position; 3191. Second groove; 3192. Second connecting portion; 320. Circuit board; 323. Collection terminal; 330. Busbar; 331. Lead-out busbar; 332. Protrusion; 333. Positioning hole;

[0060] 400, conductive member; 410, first connecting portion; 411, first through hole; 420, insulating layer;

[0061] 510, first locking component; 520, second locking component. DETAILED DESCRIPTION

[0062] 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.

[0063] 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.

[0064] 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).

[0065] 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.

[0066] Currently, the generation of green electricity generally relies on photovoltaics, wind power, and hydropower. However, wind and solar energy are generally intermittent and highly volatile, which can cause grid instability, insufficient electricity during peak hours, and excessive electricity during off-peak hours. Unstable voltage can also damage electricity. Therefore, insufficient electricity demand or insufficient grid capacity may lead to the problem of "wind and solar power curtailment". To solve these problems, we must rely on energy storage. This means converting electrical energy into other forms of energy through physical or chemical means and storing them. When needed, this energy is converted into electrical energy and released. Simply put, energy storage is like a large "power bank", storing electricity when photovoltaic and wind energy are sufficient and releasing the stored electricity when needed.

[0067] 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.

[0068] 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:

[0069] (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.

[0070] (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;

[0071] (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.

[0072] 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.

[0073] 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 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 device is always connected to the grid. The high-voltage cable 2 is connected. Under normal power generation conditions, the electric energy output by the wind power conversion device is supplied to the power consumption side of the 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, reducing the wind and solar power abandonment rates and improving the problem of new energy power generation and consumption. When the power load is high, the power grid issues a command to transmit the power stored in the energy storage device 1 in conjunction with the high-voltage cable 2 in a grid-connected mode 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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 top cover 110 and a base 120. The top cover 110 and the base 120 are connected to form a cavity for accommodating the battery module 200 and the wiring harness sampling assembly 300. The battery module 200 is fixedly connected to the base 120. 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 individual cells in the battery module 200.

[0079] 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.

[0080] It is understood that 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.

[0081] 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 X-axis direction, and the first battery module 200a is located on the left side of the second battery module 200b along the X-axis direction. The first battery module 200a and the third battery module 200c are arranged along the Y-axis direction, and the first battery module 200a is located in front of the third battery module 200c along the Y-axis direction. The third battery module 200c and the fourth battery module 200d are arranged along the X-axis direction, and the third battery module 200c is located on the left side of the fourth battery module 200d along the X-axis direction. The second battery module 200b and the fourth battery module 200d are arranged along the Y-axis direction, and the second battery module 200b is located in front of the fourth battery module 200d along the Y-axis direction.

[0082] 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.

[0083] 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.

[0084] In one embodiment, the wiring harness sampling assembly 300 is a CCS (Cell Connection System, integrated busbar).

[0085] Each battery module 200 includes multiple cells 220 and two end plates 210. The cells 220 are arranged side by side and located between the two end plates 210. The cells 220 can be connected in series, parallel, or in a hybrid configuration, where hybrid refers to a combination of series and parallel connections. The wiring harness sampling assembly 300 is capable of collecting the voltage and / or temperature of the cells 220.

[0086] 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.

[0087] 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.

[0088] like Figure 3As shown, the wiring harness sampling assembly 300 includes a carrier tray 310, a plurality of bus bars 330, and a circuit board 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 first mounting positions 311, and a plurality of bus bars 330 are assembled in the plurality of first mounting positions 311 for connecting a plurality of single cells 220 of the battery module 200. The carrier tray 310 also has a second mounting position 319, and a circuit board 320 is assembled in the second mounting position 319. The circuit board 320 has a plurality of collection terminals 323, and the ends of the collection terminals 323 are used to be electrically connected to the bus bars 330.

[0089] In one embodiment, the circuit board 320 is a flexible printed circuit (FPC). Of course, in other embodiments, the circuit board 320 may also be a rigid circuit board.

[0090] As an example, the wiring harness sampling assembly 300 includes multiple busbars 330 divided into two columns. The wiring harness sampling assembly 300 includes two circuit boards 320, each of which has multiple sampling terminals 323. The ends of the multiple sampling terminals 323 on one circuit board 320 are used to electrically connect to the busbars 330 in one column, and the ends of the multiple sampling terminals 323 on the other circuit board 320 are used to electrically connect to the busbars 330 in the other column.

[0091] like Figure 4 As shown, at least one busbar 330 among the plurality of busbars 330 is a lead-out busbar 331 , and the first mounting position 311 corresponding to the lead-out busbar 331 is a lead-out mounting position 312 .

[0092] As an example, two of the multiple busbars 330 included in the wiring harness sampling assembly 300 are lead-out busbars 331 , wherein one lead-out busbar 331 is located in one column of busbars, and the other lead-out busbar 331 is located in another column of busbars. Furthermore, the lead-out busbar 331 is located at the end of one column of busbars.

[0093] During their research, the inventors of this application discovered that when a battery pack includes multiple battery modules, adjacent output busbars of adjacent battery modules need to be connected via conductive members. Furthermore, the total positive and negative electrodes of the connected battery modules need to be connected to two conductive members. After the conductive members are connected to the output busbars, they need to span the end plates of the battery modules. Because the end plates are made of metal, insulating members need to be provided between the conductive members and the end plates to ensure a sufficiently large electrical gap between them.

[0094] Furthermore, to ensure electrical clearance between the conductive member and the end plate, and to ensure the secure connection between the conductive member and the lead busbar, the related art typically employs an insulating seat fixed to the upper surface of the end plate. The lead busbar and the conductive member are screwed to the side of the insulating seat facing away from the end plate. However, using an insulating seat to lock the conductive member to the lead busbar presents the following problems: 1. The multi-component connection requires high assembly precision, resulting in inconvenient installation and low assembly efficiency; 2. The insulating seat requires additional production and processing, increasing costs.

[0095] Based on this, the embodiment of the present application improves the structure of the carrier plate 310 to solve the problems existing in the related art. Figure 5 and Figure 6 As shown, the lead-out mounting position 312 of the carrier tray 310 has an extension 313. The orthographic projections of the extension 313 and the end plate 210 on a first target plane each have a first overlapping region. The first target plane is perpendicular to the height direction (Z-axis) of the battery module 200. The energy storage device 1 also includes a conductive member 400 having a first connecting portion 410. The first connecting portion 410 is electrically connected to the lead-out busbar 331 and is located on the side of the extension 313 facing away from the end plate 210. Along the height direction (Z-axis) of the battery module 200, the outer periphery of the first connecting portion 410 corresponding to the extension 313 is coated with an insulating layer 420.

[0096] Compared to the related art method of using an insulating seat to assemble the conductive member 400 and the lead bus 331, the energy storage device of the embodiment of the present application has the lead mounting position 312 of the carrier plate 310 extending outward to form a protrusion 313. The first connection portion 410 of the conductive member 400 is located on the side of the protrusion 313 facing away from the end plate 210 and is electrically connected to the lead bus 331. This ensures that the conductive member 400 and the lead bus 331 can be connected and that there is sufficient electrical clearance between the end plate 210 and the conductive member 400. The energy storage device of the embodiment of the present application omits the insulating seat when assembling the conductive member 400 and the lead bus 331. As a result, the assembly efficiency of the conductive member 400 and the lead bus 331 is higher and the assembly precision is easier to control, thereby improving the yield rate and production efficiency.

[0097] It should be noted that Figure 5 and Figure 6 The conductive member 400 shown here serves as the overall positive electrode conductive member for multiple battery modules 200, and can be electrically connected to the positive terminal of the battery pack. Of course, in other embodiments, the conductive member 400 can also serve as the overall negative electrode conductive member for multiple battery modules, and can be electrically connected to the negative terminal of the battery pack; or, the conductive member 400 can also bridge two adjacent wiring harness sampling assemblies 300.

[0098] In one embodiment, the first connection portion 410 is a sheet-like structure and is stacked on a side of the lead-out bus bar 331 facing away from the battery module 200 .

[0099] In the embodiment of the present application, the first connecting portion 410 is stacked on the side of the lead-out bus 331 facing away from the battery module 200, so that the conductive member 400 can be connected to the lead-out bus 331 after the multiple buses 330 of the harness sampling assembly 300 are assembled on the carrier plate 310, thereby maintaining the assembly order of the original modules of the battery pack and ensuring that the existing assembly workshop continues to be applicable to the assembly of the energy storage device of the embodiment of the present application.

[0100] Please continue reading Figure 5 and Figure 6 A protrusion 332 is provided on the side of the lead-out bus bar 331 facing away from the battery module 200 . The first connecting portion 410 has a first through hole 411 extending therethrough, and the protrusion 332 is passed through the first through hole 411 .

[0101] In the embodiment of the present application, when assembling the conductive member 400 and the lead bus 331 , the protrusion 332 can pass through the first through hole 411 , thereby achieving pre-positioning of the conductive member 400 and improving assembly accuracy.

[0102] In one embodiment, the protrusion 332 passes through the first through hole 411 and extends out of the side surface of the first connecting portion 410 facing away from the battery module 200 and is further connected to a first locking member 510, which is configured to lock the first connecting portion 410 with the lead bus 331.

[0103] In the embodiment of the present application, the conductive member 400 and the lead-out bus 331 are locked and connected via a first locking member 510. On the one hand, this is conducive to improving assembly efficiency. On the other hand, the conductive member 400 and the lead-out bus 331 are detachably connected via the first locking member 510, which facilitates later maintenance of the energy storage device.

[0104] Among them, "locking" refers to the detachable connection between components achieved through fasteners.

[0105] In one embodiment, the first locking member 510 is a nut. The protrusion 332 extending from the surface of the first connecting portion 410 facing away from the battery module 200 has external threads, and the nut is threadedly engaged with the protrusion 332 .

[0106] Of course, in other embodiments, the first locking component 510 can also be a screw, the protrusion 332 has an internal threaded hole, and the screw cap is large enough to cover the first through hole 411 of the first connecting part 410. When the screw is screwed into the internal threaded hole of the protrusion 332, the screw cap locks the conductive component 400 and the lead-out bus 331.

[0107] like Figure 5 and Figure 6 As shown, the energy storage device 1 further includes a second locking member 520. The end plate 210 has a second through hole 211, which penetrates the end plate 210 along the height direction of the battery module 200. The second locking member 520 is disposed in the second through hole 211 and locks the end plate 210 to the base 120. The extension portion 313 has a first avoidance notch 3141 on one side along the width direction of the battery module 200. Along the height direction of the battery module 200, the second locking member 520 is exposed through the first avoidance notch 3141 on the side surface of the carrier plate 310 facing away from the battery module 200.

[0108] The assembly sequence for each module of the battery pack is as follows: multiple single cells 220 and two end plates 210 are assembled into a battery module 200 - the wiring harness sampling assembly 300 is installed and fixed, and the busbars of the wiring harness sampling assembly 300 are welded to the single cells 220 of the battery module 200 - the battery module 200 and the wiring harness sampling assembly 300 are installed in the base 120 and pre-fastened with bolts - the conductive members 400 are assembled between the battery modules 200 - the wiring harness of the wiring harness sampling assembly 300 is plugged in. After the battery module 200 and the wiring harness sampling assembly 300 are installed in the base 120, the end plates 210 of the battery module 200 need to be fastened to the base 120 using bolts. Since the wiring harness sampling assembly 300 and the battery module 200 are already welded at this point, the carrier plate 310 of the wiring harness sampling assembly 300 cannot block the bolts that fasten the end plates 210 to the base 120.

[0109] In the embodiment of the present application, a first avoidance gap 3141 is provided on one side of the extension portion 313. The first avoidance gap 3141 allows the second locking member 520 to pass through and lock the end plate 210 and the base 120, ensuring that the battery module 200 and the wiring harness sampling assembly 300 are pre-fixed in the box.

[0110] In one embodiment, the second locking member 520 is a bolt.

[0111] In one embodiment, the extension portion 313 has a second avoidance gap 3142 on the other side of the battery module 200 along the width direction.

[0112] In the embodiment of the present application, the second avoidance gap 3142 is used to avoid the connection terminal of the wire harness when the wire harness of the wire harness sampling assembly 300 is connected.

[0113] like Figure 5 and Figure 6As shown, the first mounting position 311 is a first groove 3111. The first groove 3111 is recessed inward along the height direction of the battery module 200 from the side surface of the carrier plate 310 facing away from the battery module 200. The multiple busbars 330 are respectively assembled in the multiple first grooves 3111. The groove sidewalls of the first grooves 3111 are provided with second limiting portions 3112. The orthographic projections of the second limiting portions 3112 and the busbars 330 on a first target plane have a fourth overlapping area. The first target plane is perpendicular to the height direction of the battery module 200.

[0114] In the embodiment of the present application, the second limiting portion 3112 can limit the bus bar 330 in the height direction of the battery module 200 to prevent the bus bar 330 from escaping from the first groove 3111 before the bus bar 330 and the carrier plate 310 are completely fixed.

[0115] A positioning post 3113 is protruded from the bottom wall of the first groove 3111 . The bus bar 330 has a positioning hole 333 . The positioning post 3113 is inserted into the positioning hole 333 .

[0116] In the embodiment of the present application, the bus 330 is first installed in the first groove 3111, and the positioning column 3113 is inserted into the positioning hole 333. The positioning column 3113 cooperates with the positioning hole 333 to realize the pre-positioning of the bus 330. At this time, the second limiting portion 3112 can limit the bus 330 in the Z-axis direction, and then the top of the positioning column 3113 is heated to make the top of the positioning column 3113 plastically deform to realize the fixation of the bus 330 and the carrier plate 310.

[0117] like Figure 7 As shown, the carrier plate 310 is a rectangular plate structure, and at least one long side of the carrier plate 310 is provided with a flange 315. There is a second overlapping area between the flange 315 and the positive projection of the battery module 200 on the second target plane, and the second target plane is perpendicular to the width direction of the battery module 200.

[0118] In order to pursue higher space utilization and make the battery pack have higher energy density, the spacing between the battery modules 200 of the battery pack in the related art is usually designed to be smaller, resulting in a smaller electrical gap between adjacent battery modules 200. The smaller electrical gap cannot ensure safety, which makes it easy for arcing and ignition to occur in the battery pack, or even fire and explosion.

[0119] In the embodiment of the present application, on the one hand, the flange 315 can improve the insulation between the battery modules 200 and enhance electrical safety; on the other hand, when assembling the wiring harness sampling assembly 300 and the battery module 200, the flange 315 can provide pre-positioning for the wiring harness sampling assembly 300 to a certain extent, thereby ensuring the installation accuracy of the wiring harness sampling assembly 300; on the other hand, the flange 315 can also avoid the risk of short circuit caused by scratches on the insulating film of the single battery 220 when the adjacent battery modules 200 are put into the box; finally, the flange 315 can also enhance the strength of the carrier tray 310, which not only avoids the bending of the carrier tray 310, but also avoids the bending damage of the circuit board 320 and the poor contact between the collection terminal 323 and the bus 330.

[0120] like Figure 8 As shown, a first limiting portion 3151 is protruded from a surface of the flange 315 facing the battery module 200 , and a third overlapping area exists between the orthographic projections of the first limiting portion 3151 and the battery module 200 on the second target plane.

[0121] In the embodiment of the present application, a first limiting portion 3151 is convexly provided on the inner side surface of the flange 315. The first limiting portion 3151 can limit the wiring harness sampling assembly 300 in the X-axis direction, so that after the wiring harness sampling assembly 300 is installed above the battery module 200, the multiple busbars 330 of the wiring harness sampling assembly 300 can be aligned with the poles of the multiple single cells 220 of the battery module 200, ensuring the welding quality of the busbars 330 and the poles.

[0122] In one embodiment, the flange 315 is provided with two first limiting portions 3151 , and the two first limiting portions 3151 are respectively close to two ends of the flange 315 along the length direction of the battery module.

[0123] In the embodiment of the present application, two first limiting portions 3151 are arranged at the two end portions in the length direction close to the flange 315. In addition to limiting the wiring harness sampling component 300, the first limiting portion 3151 can also increase the structural strength of the flange 315, thereby preventing the flange 315 from warping and scratching the insulating film on the cable tie of the adjacent battery module, thereby improving electrical safety.

[0124] As an example, both long sides of the supporting plate 310 are provided with flanges 315, and the inner side surface of each flange 315 is protruded with two first limiting portions 3151, the two first limiting portions 3151 are arranged at intervals along the Y-axis direction, and the two first limiting portions 3151 are respectively close to the two end portions in the length direction of the flange 315.

[0125] like Figure 8As shown, the first limiting portion 3151 has a guiding inclined surface 3152 arranged obliquely relative to the height direction of the battery module 200 , and the guiding inclined surface 3152 extends from the inner side surface of the flange 315 toward the direction close to the carrier plate 310 and the battery module 200 .

[0126] In an embodiment of the present application, the first limiting portion 3151 has a guiding slope 3152. When the wiring harness sampling component 300 is assembled with the battery module 200, if the wiring harness sampling component 300 is slightly misaligned relative to the battery module 200 in the X-axis direction, the guiding slope 3152 can calibrate the position of the carrier plate 310 so that the top of the battery module 200 can be quickly inserted between the first limiting portions 3151 of the two flanges 315, thereby improving assembly efficiency.

[0127] like Figure 3 and Figure 9 As shown, the carrier plate 310 has two ridges 316 on the side facing away from the battery module 200. The portion of the carrier plate 310 between the two ridges 316 also has multiple third through-holes 318 extending therethrough. Each battery cell 220 has a first explosion-proof valve 221. The positions of the first explosion-proof valves 221 of each battery cell 220 correspond to the positions of the multiple third through-holes 318. The orthographic projections of the first explosion-proof valves 221 on a first target plane are the first projections, and the orthographic projections of the ridges 316 on the first target plane are the second projections. Each first projection is located between two second projections, and the first target plane is perpendicular to the height direction of the battery module 200. One of the upper cover 110 and the base 120 has a front panel 121. The upper cover 110, the two ridges 316, and the carrier plate 310 form an exhaust duct 317. The front panel 121 is located at one end of the exhaust duct 317 along the length of the battery module 200 and is provided with a second explosion-proof valve 1211.

[0128] Among them, the first explosion-proof valve 221 is configured to explode and discharge the gas in the single battery 220 when the gas pressure in the single battery 220 reaches a first threshold, and the second explosion-proof valve 1211 is configured to explode and discharge the gas in the box body 100 when the gas pressure in the box body 100 reaches a second threshold.

[0129] In the embodiment of the present application, the upper cover 110, the two protrusions 316 and the carrier plate 310 form an exhaust channel 317. When the single cell 220 suffers thermal runaway, the gas in the single cell 220 can break through the first explosion-proof valve 221 and flow rapidly along the exhaust channel 317 and gather toward the front panel 121, thereby speeding up the timeliness of opening the second explosion-proof valve 1211, avoiding the battery pack explosion caused by the second explosion-proof valve 1211 not opening in time, and improving the safety of the battery pack.

[0130] In one embodiment, the two circuit boards 320 are respectively located on one side of the two protrusions 316 close to the busbar, and the height of the protrusions 316 is greater than the thickness of the circuit boards 320 .

[0131] In the embodiment of the present application, the height of the protrusion 316 is greater than the thickness of the circuit board 320. When the single battery 220 experiences thermal runaway and sprays gas and particulate matter outward, the protrusion 316 can prevent the thermal runaway gas and particulate matter from spreading toward the circuit board 320, thereby preventing the thermal runaway gas and particulate matter from contaminating the circuit board 320 and preventing the circuit board 320 from short-circuiting.

[0132] It should be noted that in order to enhance the ability of the protrusions 316 to prevent thermal runaway gases and particles from spreading toward the circuit board 320 , the protrusions 316 and the carrier plate 310 need to be made of high-temperature resistant materials.

[0133] In one embodiment, the length direction of the protrusion 316 is parallel to the length direction of the battery module 200 .

[0134] like Figure 10 As shown, the second mounting position 319 has a second groove 3191; a terminal assembly 301 is provided at one end of the circuit board 320, and at least a portion of the terminal assembly 301 is located in the second groove 3191; an end of one of the collection terminals 323 is electrically connected to the bus bar 330 adjacent to the terminal assembly 301 among the multiple bus bars 330, and a surface of the bus bar 330 facing away from the battery module 200 is flush with a surface of the circuit board 320 facing away from the battery module 200.

[0135] In the embodiment of the present application, at least a portion of the terminal assembly 301 at one end of the circuit board 320 is accommodated in the second groove 3191 so that the surface of the busbar 330 facing away from the battery module 200 is flush with the surface of the circuit board 320 facing away from the battery module 200, thereby avoiding a height difference between the upper surface of the busbar 330 and the upper surface of the circuit board 320. This ensures that the collection terminal 323 can be stably connected to the busbar 330 in a straight posture, thereby ensuring the stability of the connection between the collection terminal 323 and the busbar 330.

[0136] In one embodiment, the terminal assembly 301 includes a connector 3011 and a mounting base 3012. The connector 3011 is fixed to a surface of the circuit board 320 facing away from the battery module 200. The mounting base 3012 is fixed to a surface of the circuit board 320 facing the battery module 200. At least a portion of the mounting base 3012 is located within the second groove 3191. The mounting base 3012 is also fixed to the bottom wall of the second groove 3191.

[0137] In the embodiment of the present application, the mounting base 3012 is a flat plate structure, but is not limited thereto.

[0138] In one embodiment, a second connection portion 3192 is protruded from the bottom surface of the second groove 3191 , and the mounting seat 3012 has a fourth through hole 3013 extending therethrough. The second connection portion 3192 is passed through the fourth through hole 3013 .

[0139] like Figure 4 As shown, the carrier plate 310 has lead-out mounting positions 312 at both ends along the Y-axis direction, and the two lead-out mounting positions 312 have different shapes and / or sizes. Two lead-out busbars 331 are respectively assembled in the two lead-out mounting positions 312.

[0140] In an embodiment of the present application, by distinguishing lead-out mounting positions 312 of different shapes and / or sizes, the installation direction of the harness sampling component 300 can be determined. For example, one lead-out bus 331 corresponds to the positive pole of the battery module, and the other lead-out bus 331 corresponds to the negative pole of the battery module. The two lead-out mounting positions 312 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.

[0141] In one embodiment, the lead-out mounting position 312 is a groove.

[0142] Please continue reading Figure 4 The side of the carrier plate 310 facing away from the battery module has a first identification portion 3101 and a second identification portion 3102. The first identification portion 3101 is close to one of the lead-out mounting positions 312, and the second identification portion 3102 is close to the other lead-out mounting position 312. The first identification portion 3101 is different from the second identification portion 3102.

[0143] In the embodiment of the present application, the first identification portion 3101 and the second identification portion 3102 can be used to distinguish the installation direction of the carrier plate 310, so that the operator knows the positive and negative ends of the carrier plate 310, avoiding the wrong assembly direction of the wiring harness sampling component 300.

[0144] In one embodiment, the first identification portion 3101 and the second identification portion 3102 can be non-contactly marked on the surface of the carrier plate 310 using a laser beam, or can be screen-printed with high-temperature resistant ink or inkjet printed onto the surface of the carrier plate 310. Of course, it is also possible to mechanically emboss the surface of the carrier plate 310 to create indentations or protrusions; or, the first identification portion 3101 and the corresponding carrier plate 310, and the second identification portion 3102 and the corresponding carrier plate 310, can be directly integrally formed using an integral molding process, such as injection molding.

[0145] like Figure 11 As shown, the present application also 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 .

[0146] 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.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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. An energy storage device, characterized in that: include: Battery modules, including end plates; A wire harness sampling assembly is provided on one side of the battery module, the wire harness sampling assembly comprising a carrier tray and a plurality of busbars, the carrier tray being made of an insulating material and having a plurality of first mounting positions, the plurality of busbars being respectively assembled in the plurality of first mounting positions, at least one of the plurality of busbars being a lead-out busbar, the first mounting position corresponding to the lead-out busbar being a lead-out mounting position, the lead-out mounting position having an extension portion, the orthographic projection of the extension portion and the end plate on a first target plane each having a first overlapping area, the first target plane being perpendicular to the height direction of the battery module; as well as The conductive part has a first connecting portion, which is electrically connected to the lead-out bus and is located on the side of the protruding portion facing away from the end plate; along the height direction of the battery module, the outer periphery of the portion of the first connecting portion corresponding to the protruding portion is covered with an insulating layer.

2. The energy storage device according to claim 1, characterized in that A protrusion is provided on a side of the lead-out busbar facing away from the battery module. The first connecting portion has a first through hole extending therethrough, and the protrusion is inserted into the first through hole.

3. The energy storage device according to claim 1, characterized in that The carrier plate is a rectangular plate structure, and at least one long side of the carrier plate is provided with a flange. The flange and the orthographic projection of each of the battery modules on the second target plane have a second overlapping area, and the second target plane is perpendicular to the width direction of the battery module.

4. The energy storage device according to claim 3, characterized in that A first limiting portion is protruded from a surface of the flange facing the battery module, and a third overlapping area exists between the orthographic projections of the first limiting portion and the battery module on the second target plane.

5. The energy storage device according to claim 4, characterized in that The flange is provided with two first limiting portions, and the two first limiting portions are respectively close to two end portions of the flange along the length direction of the battery module.

6. The energy storage device according to claim 4, characterized in that The first limiting portion has a guiding inclined surface that is arranged obliquely relative to the height direction of the battery module, and the guiding inclined surface extends from the inner side surface of the flange toward the direction close to the battery module.

7. The energy storage device according to claim 1, characterized in that The carrier plate is further provided with a plurality of third through holes, the battery module further comprises a plurality of single cells, the single cells have first explosion-proof valves, and the positions of the first explosion-proof valves of the plurality of single cells respectively correspond to the positions of the plurality of third through holes.

8. The energy storage device according to claim 7, characterized in that Two ridges are further provided on a surface of the carrier plate facing away from the battery module, wherein the length directions of the two ridges are parallel to the length direction of the battery module, and the two ridges are arranged side by side along the width direction of the battery module; the orthographic projection of the first explosion-proof valve on a first target plane is a first projection, and the orthographic projection of the ridges on the first target plane is a second projection, each of the first projections is located between two of the second projections, and the first target plane is perpendicular to the height direction of the battery module; The energy storage device also includes an upper cover and a base, the upper cover and the base are connected to form a cavity for accommodating the battery module and the wiring harness sampling assembly, the upper cover, the two ridges and the supporting plate form an exhaust channel, and one of the upper cover and the base has a front panel, which is located at one end of the exhaust channel along the length direction of the battery module, and a second explosion-proof valve is provided on the front panel.

9. The energy storage device according to claim 8, characterized in that The wiring harness sampling assembly further comprises two circuit boards assembled on the carrier plate, which are respectively located on one side of the two convex strips close to the bus bar, and the height of the convex strips is greater than the thickness of the circuit boards.

10. The energy storage device according to claim 1, characterized in that The carrier plate further has a second mounting position, and the second mounting position has a second groove; The wiring harness sampling assembly further includes a circuit board assembled in the second mounting position, one end of the circuit board is provided with a terminal assembly, and at least a portion of the terminal assembly is located in the second groove; The circuit board also has a plurality of collecting terminals, wherein the end of one of the collecting terminals is electrically connected to the busbar adjacent to the terminal assembly among the plurality of busbars, and the surface of the busbar facing away from the battery module is flush with the surface of the circuit board facing away from the battery module.

11. The energy storage device according to claim 10, characterized in that The terminal assembly includes a connector and a mounting seat. The connector is fixed to the side surface of the circuit board facing away from the battery module. The mounting seat is fixed to the side surface of the circuit board facing the battery module. At least a portion of the mounting seat is located in the second groove.

12. The energy storage device according to claim 11, characterized in that The mounting seat is also fixedly connected to the bottom wall of the second groove.

13. The energy storage device according to claim 12, characterized in that: A second connecting portion is protruded from the bottom surface of the second groove, the mounting seat has a fourth through hole extending therethrough, and the second connecting portion is passed through the fourth through hole.

14. The energy storage device according to any one of claims 1 to 13, characterized in that: The energy storage device further includes a base and a second locking member, the end plate having a second through hole, the second through hole penetrating the end plate along the height direction of the battery module, the second locking member being disposed in the second through hole and locking the end plate to the base; The protruding portion has a first avoidance gap on one side along the width direction of the battery module; along the height direction of the battery module, the second locking member is exposed on the side surface of the carrier plate facing away from the battery module through the first avoidance gap.

15. The energy storage device according to claim 14, characterized in that: The other side of the protruding portion along the width direction of the battery module has a second avoidance gap.

16. The energy storage device according to any one of claims 1 to 13, characterized in that: The first installation position is a first groove, which is recessed inwardly along the height direction of the battery module from the side surface of the carrier plate facing away from the battery module, and the plurality of busbars are respectively assembled in the plurality of first grooves.

17. The energy storage device according to claim 16, characterized in that A second limiting portion is protruded from a side wall of the first groove, and a fourth overlapping area exists between the orthographic projections of the second limiting portion and the busbar on the first target plane.

18. The energy storage device according to claim 16, characterized in that A positioning column is protruded from the bottom wall of the first groove, the bus bar has a positioning hole, and the positioning column is passed through the positioning hole.

19. An electrical device, characterized in that: The energy storage device comprises the energy storage device according to any one of claims 1 to 18, wherein the energy storage device is used to supply power to the electrical equipment.

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