Energy storage device and electric device

Abstract

The application discloses an energy storage device and an electric equipment. The energy storage device comprises a battery pack and a sampling assembly. The battery pack comprises a plurality of single batteries arranged side by side along the width direction of the single batteries, and the single battery has a pole. The sampling assembly comprises a plurality of sampling wire harnesses and a busbar assembly. The sampling wire harness has a sampling terminal. The busbar assembly comprises a plurality of inter-battery busbars. The inter-battery busbar has two electrode connecting portions and an arch portion connected between the two electrode connecting portions. The arch portion protrudes from the side surface of the electrode connecting portion away from the single battery. The two electrode connecting portions are connected to the poles of two adjacent single batteries respectively. The arch portion is connected to at least one sampling terminal towards the side surface of the single battery.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more specifically, to an energy storage device and an electrical appliance including the energy storage device. Background Technology

[0002] The battery pack includes multiple individual cells, multiple busbars, and a sampling harness. The multiple busbars are connected to the terminals of the multiple individual cells, and the sampling harness is connected to the busbars to collect information such as the temperature and voltage of the individual cells. However, in related technologies, the connection between the sampling harness and the busbars in the battery pack is susceptible to condensation due to temperature changes, which can lead to corrosion, damage, or even failure of the sampling harness. Summary of the Invention

[0003] This application provides an energy storage device and electrical equipment to solve the problem in related technologies where the connection between the sampling harness and the busbar is easily affected by condensate, resulting in corrosion, damage, or even failure.

[0004] The energy storage device according to the embodiments of this application includes:

[0005] A battery pack includes multiple individual cells arranged side-by-side along the width direction of the individual cells, each individual cell having terminals; and

[0006] A sampling assembly includes multiple sampling wire harnesses and a bus assembly. The sampling wire harnesses have sampling terminals. The bus assembly includes multiple inter-cell busbars. Each inter-cell busbar has two electrode connection portions and an arched portion connected between the two electrode connection portions. The arched portion protrudes from the side surface of the electrode connection portions facing away from the individual cell. The two electrode connection portions are respectively connected to the terminals of two adjacent individual cells. At least one sampling terminal is connected to the side surface of the arched portion facing the individual cell.

[0007] In the embodiments of this application, on the one hand, since the sampling terminal is connected to the side surface of the arched portion facing the single cell, the condensate formed at the connection between the sampling terminal and the arched portion can slide off by its own gravity and will not accumulate at the connection, thereby avoiding corrosion, damage or even failure of the sampling terminal due to the accumulation of condensate at the connection, and improving the service life of the sampling terminal; on the other hand, since the arched portion protrudes from the electrode connection portion, a cavity for accommodating the sampling terminal can be formed on the side of the arched portion facing the single cell, so that the sampling terminal will not interfere with the terminal post of the single cell.

[0008] Optionally, two of the multiple terminals in the battery pack are lead-out terminals;

[0009] The busbar assembly further includes two lead-out busbars, which are respectively connected to the two lead-out terminals. At least one of the sampling terminals is connected to the side surface of the lead-out busbars facing the individual battery cell.

[0010] In the embodiments of this application, since the sampling terminal is connected to the side surface of the lead-out busbar facing the single cell, the condensate formed at the connection between the sampling terminal and the lead-out busbar can slide off by its own gravity and will not accumulate at the connection, thereby avoiding corrosion, damage or even failure of the sampling terminal due to the accumulation of condensate at the connection, and improving the service life of the sampling terminal.

[0011] Optionally, the single cell further includes an upper plastic surrounding the outer periphery of the terminal post; wherein the sampling terminal connected to the lead-out bus is spaced apart from the upper plastic surrounding the outer periphery of the lead-out terminal post.

[0012] In the embodiments of this application, since the sampling terminal and the upper plastic are spaced apart, interference between the sampling terminal and the upper plastic of the single cell can be prevented after the sampling terminal and the lead-out bus are welded, thereby avoiding the inability to achieve electrical connection between the lead-out terminal and the lead-out bus.

[0013] Optionally, the lead-out bus includes a first bus plate and a second bus plate. The first bus plate is connected to the lead-out terminal and has at least one sampling terminal connected to one side surface facing the single cell. The second bus plate is connected to the first bus plate, and at least a portion of the second bus plate protrudes from the side surface of the first bus plate facing away from the single cell.

[0014] Optionally, the sampling assembly further includes a wiring harness assembly disposed on one side of the terminals of the plurality of individual cells;

[0015] The sampling harnesses and the battery busbars are installed on the harness board assembly.

[0016] Optionally, the wiring harness assembly includes a first wiring harness plate located on one side of the terminal posts of the plurality of individual cells. The first wiring harness plate has two wiring grooves spaced apart along the length direction of the individual cells, the wiring grooves extending along the width direction of the individual cells, and accommodating the sampling wiring harness.

[0017] In this embodiment, the sampling harness is housed within a wiring trough, which serves to organize the cables, allowing multiple sampling harnesses to be arranged orderly on the first harness board. This prevents the sampling harnesses from being arranged haphazardly and creating safety hazards. Furthermore, the wiring trough protects the sampling harnesses, preventing high-temperature electrolyte from the individual battery from splashing directly onto them in the event of a ruptured explosion-proof valve, thus avoiding melting of the outer insulation layer of the sampling harness.

[0018] Optionally, the first wire harness board includes:

[0019] A substrate, located on the side where the terminal of the single cell is located; and

[0020] Two protrusions are provided on the side surface of the substrate facing away from the individual battery cell;

[0021] The substrate has a wiring groove in the area corresponding to the protrusion on the side surface facing the single cell. The wiring groove is recessed into the protrusion from the side surface facing the single cell of the substrate, and has an elastic element for limiting the sampling wire bundle.

[0022] In the embodiments of this application, the sampling wire harness can be confined within the wiring groove by the elastic element in conjunction with the wiring groove, which is convenient for assembly and helps to save material costs.

[0023] Optionally, the wiring channel has a top wall and two side walls spaced apart along the length of the individual battery cell, with one end of the two side walls connected to the top wall and the other end connected to the substrate.

[0024] Along the height direction of the single cell, the elastic element and the top wall of the slot form a space to accommodate the sampling wire bundle. The elastic element has a fixed end and a free end. The fixed end is connected to the inner wall surface of one of the slot sidewalls, and the free end forms a notch with the other slot sidewall. The notch communicates with the space.

[0025] Optionally, the first wiring harness plate further includes two extension plates, which are respectively connected to the two protrusions, and the extension plates and the substrate form a groove for accommodating at least a portion of the battery busbar.

[0026] In the embodiments of this application, the battery busbar and the lead-out busbar are both housed in the groove, making the structure of the busbar assembly and the wiring harness assembly more compact and avoiding excessive occupation of the space of the energy storage device.

[0027] Optionally, the portion of the substrate located between the two protrusions is provided with a plurality of first through holes, the first through holes penetrating the substrate along the height direction of the single cell;

[0028] Along the height direction of the individual battery, the plurality of first through holes correspond to the positions of the explosion-proof valves of the plurality of individual batteries.

[0029] In the embodiments of this application, the first via is used to discharge high-temperature substances, including electrolyte, generated when a single cell experiences thermal runaway, preventing the smooth discharge of high-temperature substances from being affected by the substrate covering the explosion-proof valve.

[0030] Optionally, the opening of the wiring channel faces away from the individual battery cell;

[0031] The wiring harness assembly further includes a second wiring harness plate, which is separately connected to the side of the first wiring harness plate facing away from the single battery cell and covers the wiring groove.

[0032] In this embodiment of the application, the second wiring harness plate covers the wiring groove, which can prevent the sampling wiring harness from coming out of the wiring groove and avoid the sampling wiring harness from accidentally coming out of the wiring groove when the sampling component is installed on the top surface of multiple individual batteries.

[0033] Optionally, the first wiring harness plate has a plurality of second through holes, the second through holes penetrating the first wiring harness plate along the height direction of the individual battery, and the plurality of second through holes respectively correspond to the positions of the explosion-proof valves of the plurality of individual batteries;

[0034] The second wiring harness plate has a plurality of third through holes, which penetrate the second wiring harness plate along the height direction of the single cell, and the positions of the plurality of third through holes correspond to the positions of the plurality of second through holes.

[0035] In the embodiments of this application, the first wire harness plate has a second through hole, and the second wire harness plate has a third through hole. The second through hole and the third through hole correspond to the positions of the explosion-proof valve of the single cell. The second through hole and the third through hole are used to discharge high-temperature substances, including electrolyte, generated when the single cell experiences thermal runaway, and to prevent the smooth discharge of high-temperature substances from being affected by the first wire harness plate and the second wire harness plate covering the explosion-proof valve.

[0036] Optionally, the electrode connection portion of the battery busbar has a connection hole with one of the wire harness plate assemblies, and the other has a connection protrusion, the connection protrusion passing through the connection hole.

[0037] In the embodiments of this application, the battery busbar can be pre-installed and pre-positioned with the wiring harness board assembly by the cooperation of the connecting protrusion and the connecting hole, which facilitates the subsequent connection of the battery busbar and the terminal post.

[0038] Optionally, the connecting protrusion is interference-fitted with the connecting hole.

[0039] In the embodiments of this application, the interference fit can improve the stability of the connection between the battery bus and the wiring harness assembly, and prevent the battery bus from shifting when connecting the battery bus and the terminal post.

[0040] Optionally, the sampling harness, the battery busbar, and the harness board assembly constitute a pre-assembled component.

[0041] In the embodiments of this application, when assembling the energy storage device, multiple individual batteries can be installed into the bottom shell first, and then the sampling harness, inter-battery busbar, lead-out busbar and harness board assembly can be assembled to form a pre-assembled component. Finally, the installed sampling component is moved to the top of the multiple individual batteries, which facilitates the installation of the sampling component and improves the assembly efficiency.

[0042] The electrical equipment in this application embodiment includes the energy storage device described above, and the energy storage device supplies power to the electrical equipment. Attached Figure Description

[0043] Figure 1 The diagram shown is a structural schematic of a residential energy storage system.

[0044] Figure 2 The diagram shown is an exploded view of an energy storage device according to an embodiment of this application.

[0045] Figure 3 The diagram shown is a schematic of the sampling component according to an embodiment of this application.

[0046] Figure 4 The diagram shown is an exploded view of the sampling component according to an embodiment of this application.

[0047] Figure 5 The diagram shows the sampling harness connected to the arch.

[0048] Figure 6 The diagram shown is a cross-sectional view of a wire harness assembly according to another embodiment of this application.

[0049] Figure 7 The diagram shown is a schematic of an electrical device according to an embodiment of this application.

[0050] The reference numerals in the attached figures are explained as follows:

[0051] 1. Energy storage devices; 2. Power conversion devices; 3. User loads; 4. Electrical equipment;

[0052] 10. Single cell; 10a. Battery pack; 11. Terminal; 11a. Positive terminal; 11b. Negative terminal; 12. Explosion-proof valve; 13. Top plastic; 20. Sampling assembly; 31. Top cover; 32. Bottom shell; 41. Positive terminal; 42. Negative terminal; 50. Fan; 60. Battery management system;

[0053] 100. Wire harness board assembly; 101. Connecting protrusion; 110. First wire harness board; 111. Wiring groove; 1111. Groove top wall; 1112. Groove side wall; 112. Substrate; 1121. First through hole; 113. Raised strip; 114. Extension plate; 115. Second through hole; 120. Elastic element; 121. Fixed end; 122. Free end; 130. Space; 140. Notch; 150. Groove; 160. Second wire harness board; 161. Third through hole;

[0054] 200. Sampling harness; 201. Sampling terminal;

[0055] 300. Busbar assembly; 310. Battery busbar; 311. Electrode connection part; 3111. Connection hole; 312. Arched part; 320. Lead-out busbar; 321. First busbar; 322. Second busbar;

[0056] D1, length direction; D2, width direction; D3, height direction. Detailed Implementation

[0057] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0058] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0059] Since the energy people need is highly time- and space-dependent, in order to make rational use of energy and improve energy efficiency, it is necessary to use a medium or device to store one form of energy in the same way or by converting it into another form of energy, and then release it in a specific form of energy based on future application needs.

[0060] Current energy storage applications are quite widespread, including generation-side energy storage, grid-side energy storage, renewable energy grid-connected energy storage, and user-side energy storage. The corresponding types of energy storage devices include:

[0061] (1) Large energy storage containers used in grid-side energy storage scenarios can serve as high-quality active and reactive power regulation power sources in the grid, enabling load matching of electrical energy in time and space, enhancing the absorption capacity of renewable energy, and playing a significant role in grid system backup, alleviating peak load power supply pressure, and peak regulation and frequency regulation.

[0062] (2) Small and medium-sized energy storage cabinets used in commercial and industrial energy storage scenarios (banks, shopping malls, etc.) and small household energy storage boxes used in residential energy storage scenarios primarily operate under the "peak shaving and valley filling" mode. Because there are significant price differences in electricity consumption during peak and off-peak periods, users with energy storage devices typically charge the cabinets / boxes during off-peak hours to reduce costs; during peak hours, they release the stored electricity for use, thus saving on electricity bills. Furthermore, in remote areas and regions prone to natural disasters such as earthquakes and hurricanes, the existence of household energy storage devices effectively provides backup power for users and the power grid, eliminating the inconvenience caused by frequent power outages due to disasters or other reasons.

[0063] This explanation will take the residential energy storage scenario in user-side energy storage as an example. Figure 1 A residential energy storage system is illustrated, comprising an energy storage device 1, a power conversion device 2 (such as a photovoltaic panel), and user loads 3 (such as streetlights, household appliances, etc.). The energy storage device 1 is a small energy storage box that can be wall-mounted to an outdoor wall. Specifically, the power conversion device 2 can convert solar energy into electrical energy during periods of low electricity prices and store it through the energy storage device 1, then supply it to the user loads 3 during periods of high electricity prices, or supply it to the user loads 3 during power outages / power interruptions.

[0064] In conjunction with the aforementioned energy storage methods using physical or electrochemical means, taking electrochemical energy storage as an example, the energy storage device 1 includes at least one set of chemical batteries. The chemical elements within these batteries serve as the energy storage medium, and the charging and discharging process is achieved through the chemical reactions or changes in the storage medium. Simply put, electrical energy generated from solar or wind power is stored in at least one set of chemical batteries through the chemical reactions or changes in the storage medium. When external power consumption reaches its peak, the stored energy is released through the chemical reactions or changes in the storage medium for use, or transferred to areas with power shortages.

[0065] This application provides an energy storage device 1, which may be, but is not limited to, a battery pack, and an energy storage cabinet, energy storage container, etc., including the battery pack. The energy storage device 1 will now be explained in detail using a battery pack as an example.

[0066] like Figure 2As shown, the energy storage device 1 of this application embodiment includes an upper cover 31, a bottom shell 32, a battery pack 10a, and a sampling component 20. The upper cover 31 and the bottom shell 32 are connected. The battery pack 10a is housed within the cavity formed by the upper cover 31 and the bottom shell 32. The sampling component 20 is disposed on the top surface of the battery pack 10a and is used to collect information such as temperature and voltage. The battery pack 10a includes multiple individual cells 10, which are arranged side by side along the width direction D2 of the individual cells 10. Each individual cell 10 includes a terminal post 11. Two of the multiple terminals 11 in a battery pack 10a are lead-out terminals, and are defined as the positive lead-out terminal 11a and the negative lead-out terminal 11b, respectively. The positive lead-out terminal 11a serves as the positive electrode of the battery pack 10a, and the negative lead-out terminal 11b serves as the negative electrode of the battery pack 10a.

[0067] The single cell 10 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc. The single cell 10 can be cylindrical, flat, cuboid, etc., and the embodiments of this application do not limit this.

[0068] The energy storage device 1 may include multiple battery packs 10a, which are arranged side-by-side along the length D1 of the individual battery 10. The multiple battery packs 10a may be connected in series, parallel, or a combination thereof; this application does not impose any particular limitation on this.

[0069] It is understandable that when there are multiple battery packs 10a, there are also multiple sampling components 20, and the multiple sampling components 20 are respectively set on the top surface of multiple battery packs 10a.

[0070] like Figure 2 As shown, the energy storage device 1 also includes a positive terminal 41, a negative terminal 42, a fan 50, and a battery management system (BMS) 60. The positive terminal 41, negative terminal 42, fan 50, and BMS can be mounted on the base housing 32. The positive terminal 41 serves as the positive terminal of the battery pack, and the negative terminal 42 serves as the negative terminal. The fan 50 is used to cool the battery pack 10a. The battery management system 60 is electrically connected to the sampling assembly 20.

[0071] like Figures 3 to 5 As shown, the sampling component 20 of this application embodiment includes a wiring harness assembly 100, multiple sampling wiring harnesses 200, and a busbar assembly 300. The wiring harness assembly 100 is located on the side near the terminal posts 11 of the multiple individual batteries 10, and the multiple sampling wiring harnesses 200 and the busbar assembly 300 are mounted on the wiring harness assembly 100.

[0072] One end of the sampling harness 200 has a sampling terminal 201, and the other end of the sampling harness 200 is used for electrical connection to the battery management system 60. The bus assembly 300 includes a plurality of inter-cell busbars 310, each inter-cell busbar 310 having two electrode connection portions 311 and an arched portion 312 connecting the two electrode connection portions 311. The arched portion 312 protrudes from the side surface of the electrode connection portions 311 facing away from the individual cell 10. The two electrode connection portions 311 are respectively connected to the terminals 11 of two adjacent individual cells 10, and at least one sampling terminal 201 is connected to the side surface of the arched portion 312 facing the individual cell 10.

[0073] In the embodiments of this application, on the one hand, since the sampling terminal 201 is connected to the side surface of the arched portion 312 facing the single cell 10, the condensate formed at the connection between the sampling terminal 201 and the arched portion 312 can slide off by its own gravity and will not accumulate at the connection, thereby avoiding corrosion, damage or even failure of the sampling terminal 201 due to the accumulation of condensate at the connection, and improving the service life of the sampling terminal 201; on the other hand, since the arched portion 312 protrudes from the electrode connection portion 311, a cavity for accommodating the sampling terminal 201 can be formed on the side of the arched portion 312 facing the single cell 10, so that the sampling terminal 201 will not interfere with the terminal post 11 of the single cell 10.

[0074] It is understood that the number of sampling terminals 201 connected to the arched portion 312 of the battery bus 310 can be one or more, such as two. When there are two sampling terminals 201, one sampling terminal 201 can be used to collect temperature information, and the other sampling terminal 201 can be used to collect voltage information.

[0075] like Figures 3 to 5 As shown, the busbar assembly 300 also includes two lead-out busbars 320, which are respectively connected to the positive lead-out post 11a and the negative lead-out post 11b of the plurality of individual cells 10. At least one sampling terminal 201 is connected to the side surface of the lead-out busbar 320 facing the individual cell 10. Among the plurality of individual cells 10 in a battery pack 10a, the two posts 11 that are not connected to the inter-cell busbar 310 are the positive lead-out post 11a and the negative lead-out post 11b, respectively.

[0076] In this embodiment, since the sampling terminal 201 is connected to the side surface of the lead-out bus 320 facing the single cell 10, the condensate formed at the connection between the sampling terminal 201 and the lead-out bus 320 can slide off by its own gravity and will not accumulate at the connection, thereby avoiding corrosion, damage or even failure of the sampling terminal 201 due to the accumulation of condensate at the connection, and improving the service life of the sampling terminal 201.

[0077] like Figure 2 As shown, the single-cell battery 10 also includes an upper plastic 13 surrounding the outer periphery of the terminal post 11, and a sampling terminal 201 connected to the lead-out bus 320 is spaced apart from the upper plastic 13 surrounding the lead-out terminal post. Specifically, the sampling terminal 201 corresponding to the positive lead-out terminal post 11a is defined as the first sampling terminal, and the sampling terminal 201 corresponding to the negative lead-out terminal post 11b is defined as the second sampling terminal. The upper plastic 13 surrounding the outer periphery of the positive lead-out terminal post 11a is spaced apart from the first sampling terminal, and the upper plastic 13 surrounding the outer periphery of the negative lead-out terminal post 11b is spaced apart from the second sampling terminal.

[0078] This prevents interference between the sampling terminal 201 and the lead-out bus 320 and the upper plastic 13 of the single cell 10 after welding, thereby avoiding the inability to achieve electrical connection between the positive lead-out post 11a or the negative lead-out post 11b and the lead-out bus 320.

[0079] It is understandable that the number of sampling terminals 201 connected to the lead-out bus 320 can be one or more, such as two. When there are two sampling terminals 201, one sampling terminal 201 can be used to collect temperature information, and the other sampling terminal 201 can be used to collect voltage information.

[0080] like Figure 4 As shown, the lead-out bus 320 includes a first busbar 321 and a second busbar 322. The first busbar 321 is connected to the lead-out terminal, and at least one sampling terminal 201 is connected to the surface of the first busbar 321 facing the individual battery cell 10. The second busbar 322 is parallel to the first busbar 321 and connected to it. At least a portion of the second busbar 322 protrudes from the surface of the first busbar 321 facing away from the individual battery cell 10. The second busbar 322 is used for electrical connection to the positive terminal 41 or the negative terminal 42; or, the second busbar 322 is used for electrical connection to another adjacent battery pack 10a.

[0081] It should be noted that, for the lead-out bus 320, both the sampling terminal 201 and the lead-out post are connected to the surface of the first busbar 321 facing the individual battery 10. Therefore, to prevent interference between the sampling terminal 201 and the upper plastic 13, the sampling terminal 201 and the upper plastic 13 around the lead-out post need to be spaced apart. For the inter-battery bus 310, the arched portion 312 connects between the two electrode connection portions 311, and the arched portion 312 protrudes from the electrode connection portion 311. Therefore, the arched portion 312 and the electrode connection portion 311 are arranged in a stepped manner. When the arched portion 312 is connected to the sampling terminal 201, and the electrode connection portion 311 is connected to the post 11, the sampling terminal 201 and the upper plastic 13 around the post 11 are also spaced apart.

[0082] like Figure 3 and Figure 4 As shown, the wiring harness assembly 100 includes a first wiring harness 110 and a second wiring harness 160. The first wiring harness 110 and the second wiring harness 160 are made of an insulating material, such as plastic, but not limited thereto. The first wiring harness 110 is located on the side near the terminals 11 of the plurality of individual cells 10 and has two wiring grooves 111 spaced apart along the length direction D1 of the individual cells 10. The wiring grooves 111 extend along the width direction D2 of the individual cells 10 and accommodate sampling wiring harnesses 200.

[0083] Among them, the explosion-proof valve 12 of the single cell 10 ( Figure 2 The first orthographic projection on a target plane is located between the two second orthographic projections of the two directional grooves on the target plane along the length of the battery cell 10.

[0084] In this embodiment, the sampling harness 200 is housed within the wiring trough 111, which serves to organize the cables, allowing multiple sampling harnesses 200 to be arranged orderly on the first harness board 110, preventing a chaotic and disorderly arrangement that could pose a safety hazard. Furthermore, the wiring trough 111 protects the sampling harness 200, preventing the high-temperature electrolyte inside the individual battery 10 from directly splashing onto the sampling harness 200 when the explosion-proof valve 12 ruptures, thus avoiding melting of the outer insulation layer of the sampling harness 200.

[0085] like Figure 3 and Figure 4 As shown, the opening of the wiring groove 111 faces away from the single cell 10; the second wiring harness board 160 is separately connected to the side of the first wiring harness board 110 facing away from the single cell 10 and covers the wiring groove 111.

[0086] In this embodiment of the application, the second wiring harness plate 160 covers the wiring groove 111, which can prevent the sampling wiring harness 200 from coming out of the wiring groove 111, and avoid the sampling wiring harness 200 from accidentally coming out of the wiring groove 111 when the sampling component 20 is installed on the top surface of multiple single cells 10. On the other hand, the second wiring harness plate 160 covering the wiring groove 111 can prevent high-temperature substances such as electrolyte from spraying directly onto the sampling wiring harness 200 after the explosion-proof valve 12 sprays out when the single cell 10 thermally runs away, causing the sampling wiring harness to melt, and avoiding further thermal runaway.

[0087] It is understood that the second wire harness plate 160 and the first wire harness plate 110 can be connected by means of adhesive bonding, snap-fitting, screw connection, etc., and this application does not make any special limitation on this.

[0088] like Figure 4As shown, the first wiring harness plate 110 has multiple second through holes 115, which penetrate the first wiring harness plate 110 along the height direction D3 of the individual battery 10. The multiple second through holes 115 correspond to the positions of the explosion-proof valves 12 of the multiple individual batteries 10. The second wiring harness plate 160 has multiple third through holes 161, which penetrate the second wiring harness plate 160 along the height direction D3 of the individual battery 10. The multiple third through holes 161 correspond to the positions of the multiple second through holes 115.

[0089] In this embodiment, the first wiring harness plate 110 has a second through hole 115, and the second wiring harness plate 160 has a third through hole 161. The second through hole 115, the third through hole 161 and the explosion-proof valve 12 of the single cell 10 are positioned to discharge high-temperature substances, including electrolyte, generated when the single cell 10 experiences thermal runaway, preventing the smooth discharge of high-temperature substances from being affected by the first wiring harness plate 110 and the second wiring harness plate 160 covering the explosion-proof valve 12.

[0090] like Figure 4 As shown, the electrode connection portion 311 of the battery busbar 310 and one of the wire harness plate assemblies 100 have a connection hole 3111, and the other has a connection protrusion 101, which passes through the connection hole 3111. For example, the electrode connection portion 311 has a connection hole 3111, and the first wire harness plate 110 of the wire harness plate assembly 100 has a connection protrusion 101; or, the electrode connection portion 311 has a connection protrusion 101, and the first wire harness plate 110 of the wire harness plate assembly 100 has a connection hole 3111.

[0091] In this embodiment of the application, by connecting the protrusion 101 and the connecting hole 3111, the battery busbar 310 can be pre-installed with the wiring harness assembly 100 and pre-positioned, which facilitates the subsequent connection of the battery busbar 310 and the terminal post 11.

[0092] Furthermore, the connecting protrusion 101 and the connecting hole 3111 are interference-fitted. The interference fit improves the stability of the connection between the battery busbar 310 and the wiring harness assembly 100, and prevents the battery busbar 310 from shifting when connecting the battery busbar 310 and the terminal post 11.

[0093] It is understandable that the busbar 320 and the wiring harness assembly 100 can also be connected through the connection hole 3111 and the connection protrusion 101, which will not be described in detail here.

[0094] In one embodiment, the sampling harness 200, the battery busbar 310, the lead-out busbar 320, and the harness board assembly 100 constitute a pre-assembled component. A pre-assembled component refers to a component or part that has been partially or fully assembled before the final assembly of the product.

[0095] In the embodiments of this application, when assembling the energy storage device 1, multiple individual batteries 10 can be installed into the bottom shell 32 first, and then the sampling harness 200, the inter-battery busbar 310, the lead-out busbar 320 and the harness board assembly 100 can be assembled to form a pre-assembled part. Finally, the installed sampling component 20 is moved to the top of the multiple individual batteries 10, which facilitates the installation of the sampling component 20 and improves the assembly efficiency.

[0096] like Figure 6 As shown, the similarities between the second embodiment of this application and the above embodiments will not be repeated, but the difference lies in the structure of the wire harness assembly 100.

[0097] Specifically, the wiring harness assembly 100 has a first wiring harness plate 110, which includes a substrate 112 and two protrusions 113. The substrate 112 is located on the side near the terminal post 11 of the single cell 10; the two protrusions 113 protrude from the side surface of the substrate 112 facing away from the single cell 10; wherein, a wiring groove 111 is provided in the area corresponding to the protrusions 113 on the side surface of the substrate 112 facing the single cell 10, the wiring groove 111 is recessed from the side surface of the substrate 112 facing the single cell 10 into the protrusions 113, and the wiring groove 111 has an elastic member 120 for limiting the sampling wiring harness 200.

[0098] In this embodiment of the application, the elastic element 120, in conjunction with the wiring groove 111, can limit the sampling wire harness 200 within the wiring groove 111, which is convenient for assembly and helps to save material costs.

[0099] The elastic element 120 can be made of metal or other materials that can deform.

[0100] like Figure 6 As shown, the wiring channel 111 has a channel top wall 1111 and two channel side walls 1112 arranged at intervals along the length direction D1 of the individual cell 10. One end of the two channel side walls 1112 is connected to the channel top wall 1111, and the other end is connected to the substrate 112. Along the height direction D3 of the individual cell 10, the elastic member 120 and the channel top wall 1111 form a space 130 for accommodating the sampling wire bundle 200. The elastic member 120 has a fixed end 121 and a free end 122. The fixed end 121 is connected to the inner wall surface of one of the channel side walls 1112, and the free end 122 and the other channel side wall 1112 form a notch 140, which communicates with the space 130.

[0101] When the sampling harness 200 is inserted into the wiring groove 111 of the first harness plate 110, the opening of the wiring groove 111 of the first harness plate 110 can be facing upwards first. Then, the sampling harness 200 squeezes the elastic member 120, the elastic member 120 deforms, and the notch 140 becomes larger. Then, the sampling harness 200 is inserted into the space 130 through the notch 140. After the sampling harness 200 is inserted into the wiring groove 111, the elastic member 120 resets and can prevent the sampling harness 200 from coming out of the wiring groove 111. Finally, the first harness plate 110 is flipped over. At this time, the elastic member 120 can prevent the sampling harness 200 from coming out of the wiring groove 111, so that the first harness plate 110 and the sampling harness 200 can be moved simultaneously above multiple single cells 10 after assembly.

[0102] The fixed end 121 of the elastic element 120 can be connected to the side wall 1112 of the groove by welding, bonding or other means, and this application does not make any special limitation on this.

[0103] like Figure 6 As shown, the first wiring harness plate 110 also includes two extension plates 114, which are respectively connected to two protrusions 113. The extension plates 114 and the substrate 112 form a groove 150 for accommodating at least a portion of the battery busbar 310 and leading out at least a portion of the busbar 320. The extension plates 114 can be connected to the groove sidewall 1112 or the groove top wall 1111.

[0104] In this embodiment of the application, the battery busbar 310 and the lead-out busbar 320 are both housed in the groove 150, making the structure of the busbar assembly 300 and the wiring harness assembly 100 more compact and avoiding excessive occupation of the space 130 of the energy storage device 1.

[0105] It is understood that the busbar (including the inter-cell busbar 310 and the lead-out busbar 320) and the substrate 112 can be connected with the sampling connection hole 3111 and the connection protrusion 101 as described in the above embodiment. For example, the busbar has a connection hole 3111, and the substrate 112 has a connection protrusion 101 on the side surface facing away from the single cell 10, with the connection protrusion 101 passing through the connection hole 3111; or, the busbar has a connection protrusion 101, and the substrate 112 has a connection hole 3111.

[0106] like Figure 6 As shown, the portion of the substrate 112 located between the two protrusions 113 is provided with a plurality of first through holes 1121. The first through holes 1121 penetrate the substrate 112 along the height direction D3 of the single cell 10. Along the height direction D3 of the single cell 10, the plurality of first through holes 1121 correspond to the positions of the explosion-proof valves 12 of the plurality of single cells 10.

[0107] In this embodiment, the first through hole 1121 is used to discharge high-temperature substances, including electrolyte, generated when the single cell 10 experiences thermal runaway, preventing the smooth discharge of high-temperature substances from being affected by the substrate 112 covering the explosion-proof valve 12.

[0108] It is understood that the first wiring harness board 110 in this embodiment is integrally formed. On the one hand, this reduces the number of parts in the sampling component 20, making it easier to assemble the sampling component 20 subsequently; on the other hand, the assembled sampling component 20 is more stable, making it easier to transfer it above the single battery cell 10 to complete the assembly of the energy storage device.

[0109] like Figure 7 As shown, this application also provides an electrical device 4, which can be an energy storage device, a vehicle, an energy storage container, etc. The electrical device 4 includes the energy storage device 1 described in the above embodiments, and the energy storage device 1 supplies power to the electrical device 4. Thus, for an electrical device 4 including the aforementioned energy storage device 1, the stability of the electrical device 4's operation can be improved, the probability of the electrical device 4 failing can be reduced, and the safety of using the electrical device 4 can be improved.

[0110] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0111] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0112] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0113] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0114] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. An energy storage device, characterized in that, include: A battery pack includes multiple individual cells arranged side-by-side along the width direction of the individual cells, and each individual cell has a terminal post. as well as A sampling assembly includes multiple sampling wire harnesses and a bus assembly. The sampling wire harnesses have sampling terminals. The bus assembly includes multiple inter-cell busbars. Each inter-cell busbar has two electrode connection portions and an arched portion connected between the two electrode connection portions. The arched portion protrudes from the side surface of the electrode connection portions facing away from the individual cell. The two electrode connection portions are respectively connected to the terminals of two adjacent individual cells. At least one sampling terminal is connected to the side surface of the arched portion facing the individual cell.

2. The energy storage device according to claim 1, characterized in that, Two of the multiple terminals in the battery pack are lead-out terminals; The busbar assembly further includes two lead-out busbars, which are respectively connected to the two lead-out terminals. At least one of the sampling terminals is connected to the side surface of the lead-out busbars facing the individual battery cell.

3. The energy storage device according to claim 2, characterized in that, The single battery cell also includes an upper plastic surrounding the outer periphery of the electrode post; The sampling terminal connected to the lead-out busbar is spaced apart from the upper plastic material around the lead-out post.

4. The energy storage device according to claim 2, characterized in that, The lead-out bus includes a first busbar and a second busbar. The first busbar is connected to the lead-out terminal and has at least one sampling terminal connected to the side surface of the single cell. The second busbar is connected to the first busbar, and at least a portion of the second busbar protrudes from the side surface of the first busbar facing away from the single cell.

5. The energy storage device according to any one of claims 1-4, characterized in that, The sampling component also includes a wiring harness assembly, which is disposed on the side close to the electrode post of the plurality of individual cells; The sampling harnesses and the battery busbars are installed on the harness board assembly.

6. The energy storage device according to claim 5, characterized in that, The wiring harness assembly includes a first wiring harness plate located on one side of the terminal posts of the plurality of individual cells. The first wiring harness plate has two wiring grooves spaced apart along the length direction of the individual cells and extending along the width direction of the individual cells, and accommodating the sampling wiring harness.

7. The energy storage device according to claim 6, characterized in that, The first wire harness board includes: A substrate, located on the side where the terminal of the single cell is located; and Two protrusions are provided on the side surface of the substrate facing away from the individual battery cell; The substrate has a wiring groove in the area corresponding to the protrusion on the side surface facing the single cell. The wiring groove is recessed into the protrusion from the side surface facing the single cell of the substrate, and has an elastic element for limiting the sampling wire bundle.

8. The energy storage device according to claim 7, characterized in that, The wiring channel has a top wall and two side walls spaced apart along the length of the individual battery cell. One end of the two side walls is connected to the top wall and the other end is connected to the substrate. Along the height direction of the single cell, the elastic element and the top wall of the slot form a space to accommodate the sampling wire bundle. The elastic element has a fixed end and a free end. The fixed end is connected to the inner wall surface of one of the slot sidewalls, and the free end forms a notch with the other slot sidewall. The notch communicates with the space.

9. The energy storage device according to claim 7, characterized in that, The first wiring harness plate further includes two extension plates, which are respectively connected to the two protrusions, and the extension plates and the substrate form a groove for accommodating at least a portion of the battery busbar.

10. The energy storage device according to claim 7, characterized in that, The substrate is provided with a plurality of first through holes in the portion between the two protrusions, and the first through holes penetrate the substrate along the height direction of the single cell. Along the height direction of the individual battery, the plurality of first through holes correspond to the positions of the explosion-proof valves of the plurality of individual batteries.

11. The energy storage device according to claim 6, characterized in that, The opening of the wiring channel faces away from the individual battery cell; The wiring harness assembly further includes a second wiring harness plate, which is separately connected to the side of the first wiring harness plate facing away from the single battery cell and covers the wiring groove.

12. The energy storage device according to claim 11, characterized in that, The first wiring harness board has a plurality of second through holes, which penetrate the first wiring harness board along the height direction of the individual battery, and the plurality of second through holes correspond to the positions of the explosion-proof valves of the plurality of individual batteries respectively; The second wiring harness plate has a plurality of third through holes, which penetrate the second wiring harness plate along the height direction of the single cell, and the positions of the plurality of third through holes correspond to the positions of the plurality of second through holes.

13. The energy storage device according to claim 5, characterized in that, The electrode connection portion of the battery busbar has a connection hole with one of the wire harness board assemblies, and the other has a connection protrusion, which passes through the connection hole.

14. The energy storage device according to claim 13, characterized in that, The connecting protrusion is interference-fitted with the connecting hole.

15. The energy storage device according to claim 5, characterized in that, The sampling harness, the battery busbar, and the harness board assembly constitute a pre-assembled component.

16. An electrical appliance, characterized in that, The device includes the energy storage device according to any one of claims 1-15, wherein the energy storage device supplies power to the electrical equipment.

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