Sampling assembly, energy storage device and energy storage system

Abstract

The utility model discloses a sampling assembly, an energy storage device and an energy storage system, and relates to the technical field of energy storage. The sampling assembly comprises a separation plate, one side surface of the separation plate is provided with a pair of strip-shaped separation ribs which are oppositely arranged, the surface of the separation plate is divided into a pressure relief area, a first sampling area and a second sampling area, the first sampling area and the second sampling area are located on the two sides of the pressure relief area, and the pressure relief area is provided with a plurality of pressure relief holes which are distributed in the length direction of the separation ribs at intervals; the sampling circuit comprises a first circuit board and a second circuit board, and the first circuit board and the second circuit board are limited in the first sampling area and the second sampling area respectively. According to the embodiment of the invention, the pressure relief area is separated from the first sampling area and the second sampling area, so that the condition that the high-temperature electrolyte sprayed out along the pressure relief hole is splashed on the first circuit board and the second circuit board is avoided, the ablation of the first circuit board and the second circuit board is further avoided, and the potential safety hazard is reduced.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more specifically, to a sampling component, an energy storage device, and an energy storage system. Background Technology

[0002] A rechargeable battery, also known as a secondary battery or storage battery, is a battery that can be recharged after being discharged to reactivate its active materials and continue to be used. The recyclable nature of rechargeable batteries has made them a primary power source for electrical devices. As the demand for rechargeable batteries increases, so too do people's requirements for their performance.

[0003] Current energy storage devices include battery modules. To ensure the safety of battery module operation, a sampling circuit is typically installed to collect the operating parameters of each individual battery cell within the module and transmit them to the Battery Management System (BMS) for real-time monitoring. When setting up the sampling circuit, an isolation plate needs to be installed between the battery module and the sampling circuit to insulate the individual battery cells from the sampling circuit. The isolation plate also has pressure relief holes corresponding to explosion-proof valves to ensure that the explosion-proof valves on the individual battery cells can open normally in the event of thermal runaway.

[0004] However, in related technologies, some sampling circuits also have clearance holes on the circuit board to ensure that the explosion-proof valve can open normally during thermal runaway. In this way, the electrolyte sprayed out along the explosion-proof valve can easily splash onto the circuit board, causing the circuit board to burn and short-circuit, thereby further aggravating the degree of thermal runaway of the battery cells. Utility Model Content

[0005] A primary objective of this application is to provide a sampling component, energy storage device, and energy storage system that can reduce safety hazards.

[0006] To achieve the above-mentioned objectives, this application adopts the following technical solution:

[0007] According to one aspect of this application, a sampling assembly is provided, comprising: an isolation plate having a pair of opposing strip-shaped dividing ribs on one side surface of the isolation plate, the pair of dividing ribs dividing the surface of the isolation plate into a pressure relief zone, and a first sampling zone and a second sampling zone located on both sides of the pressure relief zone, the pressure relief zone having a plurality of pressure relief holes spaced apart along the length direction of the dividing ribs; and a sampling circuit including a first circuit board and a second circuit board, the first circuit board and the second circuit board being respectively positioned in the first sampling zone and the second sampling zone.

[0008] In this embodiment, a pair of separating ribs on the surface of the isolation plate separates the pressure relief area from the first sampling area and the second sampling area, thereby preventing the high-temperature electrolyte sprayed along the pressure relief hole from splashing onto the first circuit board and the second circuit board, thus preventing the first circuit board and the second circuit board from being burned, thereby reducing safety hazards. At the same time, since the pressure relief area avoids the need for circuit boards, only the first circuit board and the second circuit board located in the first sampling area and the second sampling area are needed to collect the electrical parameters of the multiple battery cells included in the battery module, saving the materials used for the circuit board and thus facilitating the reduction of the manufacturing cost of the sampling component.

[0009] According to one embodiment of this application, the pressure relief zone has a first reinforcing structure, the first reinforcing structure including a first reinforcing portion located between every two adjacent pressure relief holes.

[0010] In this embodiment, the first reinforcing part ensures the structural strength of the isolation plate in the pressure relief area, thereby ensuring the structural stability of the isolation plate. At the same time, the first reinforcing part can achieve isolation between two adjacent pressure relief holes, thereby reducing the overflow of electrolyte splashed along one pressure relief hole or splashing onto the battery cell corresponding to another pressure relief hole, thereby improving the isolation between multiple battery cells and improving the safety of the energy storage device.

[0011] According to one embodiment of this application, the first reinforcing structure further includes a second reinforcing portion; in the arrangement direction of the pair of separating ribs, each of the pressure relief holes has a second reinforcing portion on one side.

[0012] In this embodiment of the application, by setting the second reinforcing part, the structural strength of the isolation plate can be strengthened, while the isolation between the pressure relief hole and the first sampling area or the second sampling area can be improved, thereby reducing the situation where the electrolyte splashed along the pressure relief hole falls onto the first circuit board or the second circuit board.

[0013] According to one embodiment of this application, a first reinforcing portion between two adjacent pressure relief holes is connected to two adjacent second reinforcing portions, and in the arrangement direction of a pair of partition ribs, the two second reinforcing portions connected to each first reinforcing portion are located on different sides of the pressure relief hole.

[0014] In this embodiment, by alternately arranging multiple second reinforcing parts on different sides of the pressure relief hole, and simultaneously connecting the first reinforcing part and the second reinforcing part, the uniformity of the distribution of the first reinforcing structure in the pressure relief area is achieved, thereby improving the overall structural strength of the isolation plate in the pressure relief area.

[0015] According to one embodiment of this application, the first reinforcing structure is a reinforcing protrusion.

[0016] In this embodiment, the first reinforcing structure is set as a reinforcing protrusion, which can be reused as a baffle around the pressure relief hole, thereby reducing the splashing area of ​​the electrolyte and reducing the situation where the electrolyte splashes into the first sampling area and the second sampling area.

[0017] According to one embodiment of this application, the isolation plate has a plurality of through-holes, the plurality of through-holes corresponding one-to-one with a plurality of pressure relief holes, and each of the through-holes and the corresponding pressure relief hole are distributed in the arrangement direction of a pair of partition ribs.

[0018] In this embodiment, the multiple clearance holes on the isolation plate facilitate effective identification based on the identification information of each battery cell, enabling targeted troubleshooting of thermally runaway battery cells and improving the maintenance efficiency of the battery module.

[0019] According to one embodiment of this application, a plurality of the clearance holes are located in the pressure relief zone.

[0020] According to one embodiment of this application, the dividing rib is a strip-shaped protrusion formed on one side surface of the partition plate.

[0021] According to one embodiment of this application, the first circuit board includes a body portion, a plurality of connecting portions and a plurality of sampling terminals; the plurality of connecting portions are connected to the body portion and are spaced apart along the length direction of the partition rib, the free end of each connecting portion faces the center line on the body portion perpendicular to the length direction of the partition rib, the plurality of sampling terminals correspond one-to-one with the plurality of connecting portions, and each sampling terminal is connected to the free end of the corresponding connecting portion.

[0022] In this embodiment, the expansion of the battery cell can avoid pulling on the connection part, thereby ensuring the stability of the connection between the sampling terminal and the connection part, as well as between the connection part and the body, while avoiding the situation where the connection part is pulled off.

[0023] According to one embodiment of this application, the first sampling area of ​​the isolation plate has a second reinforcing structure.

[0024] According to one embodiment of this application, the first circuit board includes a body portion, a plurality of connecting portions and a plurality of sampling terminals, and the second reinforcing structure includes a plurality of receiving grooves spaced apart along the length direction of the partition ribs; the plurality of receiving grooves correspond one-to-one with the plurality of connecting portions, and each connecting portion is located in the corresponding receiving groove.

[0025] In this embodiment, the second reinforcing structure is provided as a receiving groove. On the one hand, it can form a recess in the area on the main body that is connected to the connecting part in the receiving groove, thereby forming a stretchable space on the main body to reduce the stretching of the main body when the battery cell expands. On the other hand, it can ensure that the connecting part connected to the main body and the busbar at the upper limit of the separator plate are at the same height, thereby facilitating the connection between the sampling terminal and the busbar and the connecting part.

[0026] According to one embodiment of this application, the surface of the first circuit board facing away from the isolation plate has a fireproof layer.

[0027] In this embodiment of the application, the fireproof layer can protect the first circuit board and prevent the high-temperature electrolyte splashed on the first circuit board from burning the first circuit board, thereby reducing safety hazards.

[0028] According to one embodiment of this application, the fireproof layer is made of mica paper.

[0029] According to one aspect of this application, an energy storage device is provided, comprising: a battery module including a plurality of battery cells; and the sampling assembly described in the aforementioned aspect, wherein the isolation plate covers the top of the battery module.

[0030] According to one aspect of this application, an energy storage system is provided, the energy storage system including the energy storage device described in the above aspect.

[0031] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0032] The above and other features and advantages of this application will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of an energy storage system according to an exemplary embodiment.

[0034] Figure 2 This is a schematic diagram of the structure of an energy storage device according to an exemplary embodiment.

[0035] Figure 3 This is a schematic diagram of the structure of another energy storage device according to an exemplary embodiment.

[0036] Figure 4 This is a schematic diagram of the structure of a sampling component according to an exemplary embodiment.

[0037] Figure 5 This is an exploded view of a sampling component according to an exemplary embodiment.

[0038] Figure 6 This is a schematic diagram of the structure of another sampling component according to an exemplary embodiment.

[0039] Figure 7 This is an exploded view of another sampling component according to an exemplary embodiment.

[0040] Figure 8 This is a schematic diagram of the structure of another sampling component according to an exemplary embodiment.

[0041] Figure 9 yes Figure 8 The diagram shows the exploded structure of the sampling component.

[0042] Figure 10 yes Figure 5 The diagram shows a partially enlarged view of the sampling component.

[0043] Figure 11 This is an exploded view of another sampling component according to an exemplary embodiment.

[0044] The reference numerals in the attached figures are explained as follows:

[0045] 100. Energy storage device; 200. Power conversion device; 300. User load;

[0046] 10. Sampling component; 20. Battery module; 21. Battery cell; 22. Bundling component; 23. Fixing end plate; 24. Explosion-proof valve;

[0047] 11. Isolation plate; 12. Sampling circuit; 13. Busbar; 14. Output electrode plate;

[0048] 111. Separating rib; 112. Pressure relief zone; 113. First sampling zone; 114. Second sampling zone; 115. Pressure relief hole; 116. Clearance hole; 117. Exposed hole; 118. First reinforcing structure; 119. Second reinforcing structure;

[0049] 1181. First reinforcing section; 1182. Second reinforcing section; 1191. Receiving groove;

[0050] 121. First circuit board; 122. Second circuit board; 123. Main body; 124. Connecting part; 125. Sampling terminal; 126. Fireproof layer. Detailed Implementation

[0051] 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.

[0052] Because the energy people need is highly time- and space-dependent, in order to make rational use of energy and improve its utilization rate, 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 applications.

[0053] Currently, green energy mainly includes solar energy and wind energy. However, solar energy and wind energy generally suffer from strong intermittency and large fluctuations, which can cause voltage instability in the green power grid (insufficient electricity during peak demand and excessive electricity during off-peak demand). Unstable voltage can damage the power grid, and therefore may lead to the problem of "curtailment of wind and solar power" due to insufficient electricity demand or insufficient grid capacity.

[0054] To solve the problem of insufficient electricity demand or inadequate grid capacity, we must rely on energy storage devices. These devices convert electrical energy into other forms of energy through physical or chemical means and store it. When needed, the stored energy is converted back into electrical energy and released. Simply put, an energy storage device is like a large "power bank," storing electrical energy when solar and wind power are abundant and releasing it when required.

[0055] 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:

[0056] (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.

[0057] (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 between peak and off-peak periods, users with energy storage devices typically charge them 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 presence 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.

[0058] This application provides an energy storage system, which includes an energy storage device for storing or supplying electrical energy.

[0059] Taking outdoor energy storage scenarios in grid-side energy storage as an example, Figure 1 A schematic diagram of an energy storage system provided in this application is illustrated. The energy storage system includes an energy storage device 100, a power conversion device 200, and a user load 300. The power conversion device 200 (including a solar energy conversion device and a wind energy conversion device) is electrically connected to the energy storage device 100, and the energy storage device 100 is electrically connected to the user load 300. Thus, the power conversion device 200 can convert other forms of energy, such as solar and wind energy, into electrical energy, which is then stored in the energy storage device 100. This stored energy can then be supplied to the user load 300 during peak electricity price periods or during power outages / power interruptions.

[0060] The energy storage device 100 can be a battery module 20, battery pack, battery box, battery system, etc., composed of battery cells 21. The battery cells 21 can be lithium-ion batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, magnesium-ion batteries, etc., and the battery cells 21 can be flat, cuboid, etc., and this application does not limit the specific form. Specifically, the battery cells 21 can utilize the chemical reaction or change of the energy storage medium (chemical elements) to achieve the charging and discharging process. Simply put, the electrical energy generated by solar or wind power is stored in the battery cells 21 through the chemical reaction or change of the energy storage medium. When the external electrical energy usage reaches its peak, the electrical energy stored in the battery cells 21 is released for use or transferred for later use through the chemical reaction or change of the energy storage medium.

[0061] In some implementations, such as Figure 2As shown, the energy storage device 100 includes a battery module 20 and a sampling component 10. The battery module 20 includes multiple battery cells 21. The sampling component 10 covers the top of the battery module 20 and is connected to the multiple battery cells 21. In this way, the sampling component 10 can collect the electrical parameters (such as temperature, voltage, current, etc.) of the multiple battery cells 21 and transmit the collected electrical parameters to the battery management system to realize the monitoring of the multiple battery cells 21 in the battery module 20.

[0062] The battery module 20 includes multiple battery cells 21 arranged sequentially, and these battery cells 21 can be tightly bound together and secured using a binding member 22 (such as a cable tie). Further, as... Figure 2 As shown, the battery module 20 includes a pair of fixed end plates 23 arranged opposite to each other, and a plurality of battery cells 21 are arranged sequentially between the pair of fixed end plates 23, and the fixed end plates 23 and the plurality of battery cells 21 are bound and fixed by a binding member 22.

[0063] The energy storage device 100 can include 1, 2, 4, 6, 8, or more battery modules 20. The more battery modules 20 there are, the higher the capacity of the energy storage device 100, making it easier to meet market demands. Additionally, the energy storage device 100 includes sampling components 10 corresponding to each battery module 20, with each sampling component 10 covering the top of multiple individual battery cells 21 within the corresponding battery module 20.

[0064] For example, such as Figure 3 As shown, the energy storage device 100 includes two rows of battery modules 20 distributed along a first direction X (i.e., the arrangement direction of the battery cells 21 in a battery module 20 and the length direction of the separator ribs 111) and two columns of battery modules 20 distributed along a second direction Y (i.e., the direction perpendicular to the arrangement direction of the multiple battery cells 21 and the arrangement direction of a pair of separator ribs 111), that is, the energy storage device 100 includes a total of 4 battery modules 20; in addition, the energy storage device 100 includes a sampling component 10 covering the top of each of the 4 battery modules 20, so as to collect the electrical parameters of the battery cells 21 in the 4 battery modules 20 respectively through the 4 sampling components 10.

[0065] In some embodiments, the energy storage device 100 includes a battery housing with a battery compartment, in which the battery module 20 is housed. This allows for the overall assembly of the battery module 20, facilitating its overall handling. Furthermore, the battery module 20 within the battery compartment is protected from collisions with individual battery cells 21, enhancing the safety of the battery module 20 during use.

[0066] In related technologies, the sampling component 10 includes an isolation plate 11 covering the top of the battery module 20, and a sampling circuit 12 limited on the surface of the isolation plate 11 facing away from the battery module 20. The isolation plate 11 has a pressure relief hole 115 facing the explosion-proof valve 24 on the battery cell 21. The circuit board of the sampling circuit 12 has a clearance hole facing the pressure relief hole 115, so that the explosion-proof valve 24 can open normally in the area where the pressure relief hole 115 and the clearance hole are located when the battery cell 21 experiences thermal runaway. In this way, although the normal opening of the explosion-proof valve 24 is guaranteed, the high-temperature electrolyte sprayed along the explosion-proof valve 24 is easy to splash onto the circuit board, causing the sampling circuit 12 to be burned, thereby increasing the risk of thermal runaway of the battery cell 21.

[0067] In this application embodiment, a sampling component 10 is provided, such as... Figure 2 As shown, the sample module 10 includes an isolation plate 11 covering the top of the battery module 20, and a sampling circuit 12 limited on the isolation plate 11, with the sampling circuit 12 isolated from the pressure relief hole 115 on the isolation plate 11. This prevents high-temperature electrolyte from splashing onto the sampling circuit 12 after being ejected along the explosion-proof valve 24, thus preventing the sampling circuit 12 from burning and improving the safety of the sampling component 10. Simultaneously, it improves the electrical safety of the energy storage device 100 including the sampling component 10.

[0068] In some implementations, such as Figure 4 and Figure 5 As shown, the sampling assembly 10 includes an isolation plate 11 and a sampling circuit 12. One side surface of the isolation plate 11 has a pair of oppositely arranged strip-shaped dividing ribs 111, which divide the surface of the isolation plate 11 into a pressure relief area 112 and a first sampling area 113 and a second sampling area 114 located on both sides of the pressure relief area 112. The pressure relief area 112 has a plurality of pressure relief holes 115 spaced apart along the length direction (i.e., the first direction X) of the dividing ribs 111. The sampling circuit 12 includes a first circuit board 121 and a second circuit board 122, which are respectively limited to the first sampling area 113 and the second sampling area 114.

[0069] In this embodiment, a pair of separating ribs 111 provided on the surface of the isolation plate 11 separates the pressure relief area 112 from the first sampling area 113 and the second sampling area 114, thereby preventing the high-temperature electrolyte sprayed along the pressure relief hole 115 from splashing onto the first circuit board 121 and the second circuit board 122, thus preventing the first circuit board 121 and the second circuit board 122 from being burned, thereby reducing safety hazards; at the same time, since the pressure relief area 112 avoids the setting of circuit boards, that is, only the first circuit board 121 and the second circuit board 122 located in the first sampling area 113 and the second sampling area 114 are needed to collect the electrical parameters of the multiple battery cells 21 included in the first battery module 20, saving the materials of the circuit board, thereby facilitating the reduction of the manufacturing cost of the sampling component 10.

[0070] The separator 11 can be a plate-like structure made of insulating materials such as plastic sheet, to achieve insulation between the first circuit board 121 and the second circuit board 122 and the battery cell 21 when the separator 11 covers the top of the battery cell 21. The separator rib 111 can be a strip-shaped protrusion formed on one side surface of the separator 11, or a strip-shaped groove formed on one side surface of the separator 11, and the separator rib 111 can be formed by processes such as stamping and die casting. Taking the separator rib 111 as a strip-shaped protrusion formed on the separator 11 as an example, it can be a rectangular protrusion, an arc-shaped protrusion, etc., formed by stamping process.

[0071] The first circuit board 121 and the second circuit board 122 are positioned on the isolation plate 11 to prevent the circuit boards from shaking when the sampling component 10 is transported. Specifically, the first circuit board 121 and the second circuit board 122 can be directly positioned on the first sampling area 113 and the second sampling area 114 on the isolation plate 11, or the first circuit board 121 and the second circuit board 122 can be pre-positioned on the first sampling area 113 and the second sampling area 114 on the isolation plate 11 before being positioned on the isolation plate 11, so as to improve the assembly efficiency of the first circuit board 121 and the second circuit board 122 on the isolation plate 11.

[0072] For example, both the first sampling area 113 and the second sampling area 114 of the isolation plate 11 have positioning posts, and both the first circuit board 121 and the second circuit board 122 have positioning holes. Based on the positioning holes on the first circuit board 121 and the second circuit board 122, and the positioning posts on the isolation plate 11, the first circuit board 121 and the second circuit board 122 can be pre-positioned in the first sampling area 113 and the second sampling area 114, and then the first circuit board 121 and the second circuit board 122 can be limited on the isolation plate 11. For the limitation of the first circuit board 121 and the second circuit board 122 on the isolation plate 11, for example, the positioning posts are heat-fused posts. After the first circuit board 121 and the second circuit board 122 are pre-positioned on the isolation plate 11, the positioning posts can be heat-fused using a heat-fusion device to form a limit cap structure, thereby limiting the first circuit board 121 and the second circuit board 122.

[0073] Among them, such as Figure 4 and Figure 5 As shown, the sampling component 10 also includes multiple buses 13, which are divided into a first group of buses and a second group of buses. The first group of buses and the second group of buses are respectively limited to the first sampling area 113 and the second sampling area 114. Each bus 13 of the first group is connected to the first circuit board 121, and each bus 13 of the second group is connected to the second circuit board 122.

[0074] Among them, such as Figure 4 and Figure 5 As shown, both the first sampling area 113 and the second sampling area 114 of the isolation plate 11 have through-holes 117 so that when the isolation plate 11 covers the top of the battery module 20, the electrode terminals of the battery cells 21 are exposed at the holes 117 on the isolation plate 11. This facilitates the connection of some battery cells 21 by the first busbar in the first sampling area 113 and the connection of some battery cells 21 by the second busbar in the second sampling area 114, so as to realize the series and parallel connection of multiple battery cells 21 as a whole. At the same time, after the first circuit board 121 and the second circuit board 122 are respectively connected to the first busbar 13 and the second busbar 13, the electrical parameters of multiple battery cells 21 are collected.

[0075] It should be noted that the series and parallel connection of multiple battery cells 21 can be a series connection of multiple battery cells 21 sequentially, or a series connection of multiple battery cells 21 connected in parallel in pairs; in addition, as Figure 4 or Figure 5As shown, the sampling component 10 also includes output electrode plates 14 located in the first sampling area 113 and the second sampling area 114, and the two output electrode plates 14 are located at different ends of the isolation plate 11 in the length direction (i.e. the first direction X) of the separating rib 111, so as to realize the series and parallel connection of multiple battery modules 20 or the connection with external circuit through the two output electrode plates 14.

[0076] In some implementations, such as Figure 4 or Figure 5 As shown, the isolation plate 11 has a plurality of through clearance holes 116, and the plurality of clearance holes 116 correspond one-to-one with a plurality of pressure relief holes 115. Each clearance hole 116 and the corresponding pressure relief hole 115 are distributed in the arrangement direction of a pair of partition ribs 111 (i.e., the second direction Y).

[0077] The multiple clearance openings on the separator 11 correspond one-to-one with the multiple battery cells 21 of the battery module 20. When the separator 11 covers the top of the battery module 20, the multiple clearance openings 116 expose the identification information (such as battery QR code information) of the battery cells 21. This facilitates effective identification based on the identification information of each battery cell 21, enabling targeted troubleshooting of battery cells 21 experiencing thermal runaway, and improving the maintenance efficiency of the battery module 20.

[0078] In this configuration, along the length of the separator 111, two adjacent clearance holes 116 are located on different sides of the corresponding pressure relief hole 115. This ensures that after the multiple battery cells 21 are arranged, the clearance holes 116 expose the identification information on the corresponding battery cells 21. Furthermore, when the number of battery cells 21 included in the battery module 20 is odd, the clearance holes 116 on the separator 11 enable foolproof assembly of the separator 11 on the top of the battery module 20, thereby ensuring the assembly yield of the sampling component 10 on the battery module 20.

[0079] Options, such as Figure 4 or Figure 5 As shown, the multiple clearance holes 116 on the isolation plate 11 are all located in the pressure relief area 112, thereby increasing the effective volume of the pressure relief area 112 to accommodate more electrolyte and reduce the possibility of electrolyte overflow into the first sampling area 113 and the second sampling area 114. Of course, the multiple clearance holes on the isolation plate 11 can also be distributed in the first sampling area 113 and the second sampling area 114, and the embodiments of this application do not limit this.

[0080] In some implementations, such as Figure 4 or Figure 5 As shown, the pressure relief zone 112 has a first reinforcing structure 118. Thus, the first reinforcing structure 118 ensures the structural strength of the isolation plate 11 in the pressure relief zone 112, thereby ensuring the structural stability of the isolation plate 11.

[0081] The first reinforcing structure 118 is located around the pressure relief hole 115 to avoid affecting the normal opening of the explosion-proof valve 24 on the battery cell 21. The first reinforcing structure 118 can be a reinforcing groove or a reinforcing protrusion. When the first reinforcing structure 118 is a reinforcing groove, it facilitates the collection of high-temperature electrolyte splashed along the pressure relief hole 115, thereby preventing electrolyte overflow into the first sampling area 113 and / or the second sampling area 114. When the first reinforcing structure 118 is a reinforcing protrusion, it can be reused as a baffle around the pressure relief hole 115 to reduce the electrolyte splash area, thereby reducing the possibility of electrolyte splashing into the first sampling area 113 and the second sampling area 114.

[0082] In some implementations, such as Figure 4 or Figure 5 As shown, the first reinforcing structure 118 includes a first reinforcing portion 1181 located between every two adjacent pressure relief holes 115.

[0083] Thus, by setting the first reinforcing part 1181, the structural strength of the isolation plate 11 can be strengthened while the isolation between two adjacent pressure relief holes 115 can be achieved, so as to reduce the overflow of electrolyte splashed along one pressure relief hole 115 or splashing onto the battery cell 21 corresponding to another pressure relief hole 115, thereby improving the isolation between multiple battery cells 21 and improving the safety of the energy storage device 100.

[0084] As shown above, the first reinforcing part 1181 can be a reinforcing protrusion or a reinforcing groove. Figure 4 or Figure 5 An example is given where the first reinforcing part 1181 is a reinforcing protrusion.

[0085] Furthermore, the first reinforcing part 1181 included in the first reinforcing structure 118 can be as follows: Figure 4 or Figure 5 As shown, each pair of adjacent pressure relief holes 115 has a first reinforcing part 1181, or it can be as follows: Figure 6 As shown, two adjacent pressure relief holes 115 form a group, and a first reinforcing part 1181 is provided between each two adjacent groups of pressure relief holes 115. Of course, it is also possible that three adjacent pressure relief holes 115 form a group, and a first reinforcing part 1181 is provided between each two adjacent groups of pressure relief holes 115; or a first reinforcing part 1181 is provided between each two adjacent groups of pressure relief holes 115, and a first reinforcing part is provided between two adjacent pressure relief holes 115 in some groups of pressure relief holes 115, etc. The embodiments of this application do not limit this.

[0086] In some implementations, such as Figure 6 or Figure 7As shown, the first reinforcing structure 118 further includes a second reinforcing part 1182; in the arrangement direction of the pair of separating ribs 111 (i.e., the second direction Y), each pressure relief hole 115 has a second reinforcing part 1182 on one side.

[0087] Thus, by providing the second reinforcing part 1182, the structural strength of the isolation plate 11 can be strengthened, while the isolation between the pressure relief hole 115 and the first sampling area 113 or the second sampling area 114 can be improved, thereby reducing the situation where the electrolyte splashed along the pressure relief hole 115 falls onto the first circuit board 121 or the second circuit board 122.

[0088] As described above, the second reinforcing part 1182 can be a reinforcing protrusion or a reinforcing groove. Figure 6 or Figure 7 An example is given of the second reinforcing part 1182 being a reinforcing protrusion.

[0089] Additionally, the second reinforcing portion 1182 corresponding to the multiple pressure relief holes 115 can be as follows: Figure 6 or Figure 7 As shown, the second reinforcing part 1182 corresponding to each pair of adjacent pressure relief holes 115 is located on different sides of the pressure relief hole 115 in the arrangement direction of the pair of separating ribs 111 (i.e., the second direction Y). In this case, for the battery module 20 including the sampling component 10, the battery cells 21 can be connected in series sequentially. Of course, it is also possible that two adjacent pressure relief holes 115 are grouped together, and in the arrangement direction of the pair of separating ribs 111 (i.e., the second direction Y), the two second reinforcing parts 1182 corresponding to each group of pressure relief holes 115 are located on the same side of the pressure relief hole 115 in the arrangement direction of the pair of separating ribs 111, and the second reinforcing parts 1182 corresponding to two adjacent groups of pressure relief holes 115 are located on different sides of the pressure relief hole 115. In this case, for the battery module 20 including the sampling component 10, the battery cells 21 can be connected in parallel in pairs and then connected in series sequentially.

[0090] It should be noted that, in the embodiments of this application, the first reinforcing structure 118 may include only the first reinforcing part 1181, or only the second reinforcing part 1182, or may include both the first reinforcing part 1181 and the second reinforcing part 1182.

[0091] Taking the first reinforcing structure 118 as an example, which includes both a first reinforcing part 1181 and a second reinforcing part 1182, it can be as follows: Figure 6 or Figure 7 As shown, the first reinforcing part 1181 and the second reinforcing part 1182 are independent structures, that is, the first reinforcing part 1181 and the second reinforcing part 1182 are disconnected. Of course, it can also be as follows... Figure 8 and Figure 9As shown, the first reinforcing part 1181 between two adjacent pressure relief holes 115 is connected to two adjacent second reinforcing parts 1182, and in the arrangement direction of a pair of partition ribs 111 (i.e., the second direction Y), the two second reinforcing parts 1182 connected to each first reinforcing part 1181 are located on different sides of the pressure relief hole 115.

[0092] Thus, by connecting the first reinforcing part 1181 and the second reinforcing part 1182, the integral structure of the first reinforcing part 1181 and the second reinforcing part 1182 is achieved, thereby improving the overall structural strength of the isolation plate 11 in the pressure relief zone 112.

[0093] The two adjacent second reinforcing portions 1182 refer to the two second reinforcing portions 1182 corresponding to the two pressure relief holes 115 adjacent to each other on both sides of the first reinforcing portion 1181 along the length direction of the partition rib 111 (i.e., the length direction X of the partition plate 11). In conjunction with the above-described arrangement of the first reinforcing portion 1181, when the two ends of the first reinforcing portion 1181 are connected to the two adjacent pressure relief holes 115 corresponding to the second reinforcing portions 1182, it can be as follows: Figure 8 As shown, the first reinforcing structure 118 includes a plurality of right-angled Z-shaped structures (corresponding to) formed by connecting the first reinforcing part 1181 and the second reinforcing part 1182. Figure 6 The first reinforcing part 1181 shown can also be a continuous S-shaped bending structure formed by connecting the first reinforcing part 1181 and the second reinforcing part 1182 (corresponding to...). Figure 7 The first reinforcing part 1181 shown.

[0094] In some implementations, such as Figure 5 or Figure 9 As shown, the first sampling area 113 of the isolation plate 11 has a second reinforcing structure 119. In this way, the structural strength of the isolation plate 11 in the first sampling area 113 can be improved by the second reinforcing structure 119.

[0095] The second reinforcing structure 119 may be a support protrusion or a receiving groove 1191, etc.

[0096] In addition, such as Figure 5 or Figure 9 As shown, the second sampling area 114 of the isolation plate 11 also has a second reinforcing structure 119. This, combined with the first reinforcing structure 118 located in the pressure relief area 112 and the second reinforcing structure 119 located in the first sampling area 113 and the second sampling area 114, improves the overall structural strength of the isolation plate 11.

[0097] In this embodiment of the application, the structures of the first circuit board 121 and the second circuit board 122 can be the same or different. Taking the example that both the first circuit board 121 and the second circuit board 122 are flexible circuit boards, such as... Figure 10 As shown, the first circuit board 121 includes a body portion 123, a plurality of connecting portions 124 and a plurality of sampling terminals 125; the plurality of connecting portions 124 are connected to the body portion 123 and are spaced apart along the length direction of the partition rib 111 (i.e., the first direction X); the plurality of sampling terminals 125 correspond one-to-one with the plurality of connecting portions 124, and each sampling terminal 125 is connected to the free end of the corresponding connecting portion 124.

[0098] The main body 123 and the plurality of connecting parts 124 can be an integral structure. The sampling terminal 125 can be a nickel sheet or the like, and is soldered to the free end of the connecting part 124. Furthermore, the free end of the connecting part 124 can be an end not connected to the main body 123, or an end connected to the main body 123 via a connecting bridge, etc. For example, the integral structure of the main body 123 and the plurality of connecting parts 124 is a stripline with a certain width, and can be an FPC (Flexible Printed Circuit) or an FFC (Flexible Flat Cable), etc.

[0099] The body portions 123 of the first circuit board 121 and the second circuit board 122 can be set separately (i.e., set separately) and connected to the battery management system respectively; or the body portions 123 of the first circuit board 121 and the second circuit board 122 are an integral structure and have a U-shaped structure, that is, the ends of the body portions 123 of the first circuit board 121 and the second circuit board 122 that are connected to the battery management system are connected as one unit and then connected to the battery management system, thereby reducing the number of components and simplifying the connection between the first circuit board 121, the second circuit board 122 and the battery management system.

[0100] In some embodiments, the first circuit board 121 described above includes multiple connecting portions 124, such as... Figure 10 As shown, the free end of each connecting part 124 is directed toward the center line O on the main body part 123, which is perpendicular to the length direction (i.e., the first direction X) of the partition rib 111.

[0101] Since the free ends of each connecting portion 124 face the center line O of the main body 123, and when the battery cell 21 expands, it tends to move the busbar 13 away from the center line O of the main body 123, the free ends of each connecting portion 124 tend to move closer to the fixed end (i.e., the end of the connecting portion 124 that is connected to the main body 123). This avoids the situation where the connecting portion 124 is pulled when the battery cell 21 expands, thus ensuring the stability of the connection between the sampling terminal 125 and the connecting portion 124, and between the connecting portion 124 and the main body, while also preventing the connecting portion 124 from being broken.

[0102] For example, the battery module 20 includes 13 battery cells 21, and correspondingly the first circuit board 121 includes 6 connecting portions 124 connected to 6 busbars 13 and 1 connecting portion 124 connected to the output electrode plate 14. At this time, in the length direction of the partition rib 111 (i.e., the first direction X), the free ends of the 4 connecting portions 124 located to the left of the center line O of the body portion 123 and connected to the 3 busbars 13, and the 1 connecting portion 124 connected to the output electrode plate 14, all face the center line O of the body portion 123; the free ends of the 3 connecting portions 124 located to the right of the center line O of the body portion 123 and connected to the 3 busbars 13, all face the center line O of the body portion 123.

[0103] It should be noted that the specific structure of the second circuit board 122 can be referred to the first circuit board 121 described above. For example, the second circuit board 122 includes a body part 123 and a connecting part 124, and the free end of the connecting part 124 faces the center line O of the body part 123 in the length direction of the partition rib 111.

[0104] In some embodiments, the first sampling area 113 described above has a second reinforcing structure 119, and the first circuit board 121 includes a body portion 123, a connecting portion 124, and a sampling terminal 125, such as... Figure 10 As shown, the second reinforcing structure 119 includes a plurality of receiving grooves 1191 spaced apart along the length direction (i.e., the first direction X) of the partition rib 111; the plurality of receiving grooves 1191 correspond one-to-one with a plurality of connecting portions 124, and each connecting portion 124 is located in the corresponding receiving groove 1191.

[0105] Thus, by setting the receiving groove 1191, the connecting part 124 connected to the main body 123 and the busbar 13 at the upper limit of the isolation plate 11 can be located at the same height, thereby facilitating the connection between the sampling terminal 125 and the busbar 13 and the connecting part 124.

[0106] Alternatively, the area of ​​the receiving groove 1191 can be large, with the two connecting parts 124 located in the same receiving groove 1191. At the same time, the area on the main body 123 connected to the connecting part 124 can also be accommodated in the receiving groove 1191, so as to realize the recess of the main body 123 in the receiving groove 1191, thereby forming a stretchable space on the main body 123 to reduce the stretching of the main body 123 when the battery cell 21 expands.

[0107] It should be noted that the specific structure of the second reinforcing structure 119 can be configured according to the assembly of the busbar 13 on the isolation plate 11. In the case where the second reinforcing structure 119 includes multiple receiving slots 1191, the exposed hole 117 on the isolation plate 11 located in the first sampling area 113 can be a recessed hole, with the busbar 13 confined within the recessed hole, and the upper surface of the busbar 13 flush with the surface of the isolation plate 11. In this case, when the connecting portion 124 of the first circuit board 121 is confined within the receiving slot 1191, the upper surface of the connecting portion 124 is flush with the surface of the isolation plate 11, facilitating the connection between the sampling terminal 125 and the busbar 13 and the connecting portion 124. When the second reinforcing structure 119 described above includes multiple support protrusions, the upper surface of the busbar 13 protrudes from the surface of the isolation plate 11 when the busbar 13 is positioned on the isolation plate 11. At this time, the connecting portion 124 of the first circuit board 121 is supported on the support protrusions to ensure that the upper surface of the connecting portion 124 is flush with the upper surface of the busbar 13, so as to facilitate the connection between the sampling terminal 125 and the busbar 13 and the connecting portion 124.

[0108] In addition, the second reinforcing structure 119 of the second sampling area 114 on the isolation plate 11 can be set with reference to the second reinforcing structure 119 of the first sampling area 113, and the relative position of the second circuit board 122 and the second reinforcing structure 119 of the second sampling area 114 can be referenced with reference to the relative position of the first circuit board 121 and the second reinforcing structure 119 of the first sampling area 113 as described above. This application embodiment will not elaborate further on this.

[0109] In some implementations, such as Figure 11 As shown, the surface of the first circuit board 121 facing away from the isolation plate 11 has a fireproof layer 126.

[0110] Thus, by setting the fireproof layer 126, the first circuit board 121 can be protected, preventing the high-temperature electrolyte splashed on the first circuit board 121 from burning the first circuit board 121, thereby reducing safety hazards.

[0111] The fireproof layer 126 is made of a high-temperature resistant material such as mica paper, and it can be fixed to the surface of the main body plate away from the isolation plate 11 by vapor deposition, coating, or high-temperature resistant double-sided adhesive. Using mica paper as the material for the fireproof layer 126 simplifies its formation process and improves the manufacturing efficiency of the acquisition component. Furthermore, considering the structure of the first circuit board 121 described above, the fireproof layer 126 can be present only on the main body 123, or it can be present on both the main body 123 and the connecting portion 124, or it can be present on all three components: the main body 123, the connecting portion 124, and the sampling terminal 125. This application does not limit the specific embodiment to this method.

[0112] When a fireproof layer 126 is provided on the surface of the first circuit board 121 facing away from the isolation plate 11, the fireproof layer 126 can extend beyond the edge of the first circuit board 121 and cover part of the surface of the isolation plate 11, thereby providing overall protection for the first circuit board 121 and improving its anti-ablation effect. Alternatively, the first sampling area 113 of the isolation plate 11 can be provided with a groove, with the first circuit board 121 confined within the groove and its surface flush with the surface of the isolation plate 11. This ensures the flatness of the fireproof layer 126 when it covers part of the surface of the isolation plate 11, thus preventing wrinkles in the fireproof layer 126 and further improving its anti-ablation effect on the first circuit board 121.

[0113] It should be noted that the specific structure of the second circuit board 122 can be referred to the first circuit board 121 described above, and will not be repeated in this embodiment. For example, the surface of the second circuit board 122 facing away from the isolation plate 11 has a fireproof layer 126.

[0114] 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 explicitly 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.

[0115] In the description of the embodiments of this 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 this 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 this application.

[0116] 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 implementation of this application. 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.

[0117] The above are merely preferred embodiments of the implementation methods of this application and are not intended to limit the implementation methods of this application. For those skilled in the art, various modifications and variations can be made to the implementation methods of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the implementation methods of this application should be included within the protection scope of the implementation methods of this application.

Claims

1. A sampling component, characterized in that, include: An isolation plate (11) has a pair of opposing strip-shaped dividing ribs (111) on one side surface, the pair of dividing ribs (111) dividing the surface of the isolation plate (11) into a pressure relief area (112), and a first sampling area (113) and a second sampling area (114) located on both sides of the pressure relief area (112), the pressure relief area (112) having a plurality of pressure relief holes (115) spaced apart in the length direction of the dividing ribs (111); The sampling circuit (12) includes a first circuit board (121) and a second circuit board (122), wherein the first circuit board (121) and the second circuit board (122) are respectively limited in the first sampling area (113) and the second sampling area (114).

2. The sampling component as described in claim 1, characterized in that, The pressure relief zone (112) has a first reinforcing structure (118), which includes a first reinforcing portion (1181) located between each two adjacent pressure relief holes (115).

3. The sampling component as described in claim 2, characterized in that, The first reinforcing structure (118) also includes a second reinforcing part (1182); In the arrangement direction of the pair of said partition ribs (111), each of the pressure relief holes (115) has a second reinforcing part (1182) on one side.

4. The sampling component as described in claim 3, characterized in that, The first reinforcing part (1181) between two adjacent pressure relief holes (115) is connected to two adjacent second reinforcing parts (1182). In the arrangement direction of a pair of partition ribs (111), the two second reinforcing parts (1182) connected to each first reinforcing part (1181) are located on different sides of the pressure relief hole (115).

5. The sampling component as described in any one of claims 2-4, characterized in that, The first reinforcing structure (118) is a reinforcing protrusion.

6. The sampling component as described in any one of claims 1-4, characterized in that, The isolation plate (11) has a plurality of through clearance holes (116), and the plurality of clearance holes (116) correspond one-to-one with the plurality of pressure relief holes (115), and each clearance hole (116) and the corresponding pressure relief hole (115) are distributed in the arrangement direction of a pair of partition ribs (111).

7. The sampling component as described in claim 6, characterized in that, The plurality of the clearance holes (116) are located in the pressure relief area (112).

8. The sampling component as described in any one of claims 1-4, characterized in that, The dividing rib (111) is a strip-shaped protrusion formed on one side surface of the partition plate (11).

9. The sampling component as described in any one of claims 1-4, characterized in that, The first circuit board (121) includes a body (123), multiple connecting parts (124), and multiple sampling terminals (125); Multiple connecting portions (124) are connected to the main body (123) and are spaced apart along the length of the partition rib (111). The free end of each connecting portion (124) faces the center line on the main body (123) that is perpendicular to the length of the partition rib (111). Multiple sampling terminals (125) correspond one-to-one with multiple connecting portions (124), and each sampling terminal (125) is connected to the free end of the corresponding connecting portion (124).

10. The sampling component as described in any one of claims 1-4, characterized in that, The first sampling area (113) of the isolation plate (11) has a second reinforcing structure (119).

11. The sampling component as claimed in claim 10, characterized in that, The first circuit board (121) includes a body part (123), a plurality of connecting parts (124) and a plurality of sampling terminals (125), and the second reinforcing structure (119) includes a plurality of receiving grooves (1191) spaced apart in the length direction of the partition rib (111); Each of the plurality of receiving slots (1191) corresponds to one of the plurality of connecting parts (124), and each of the connecting parts (124) is located in the corresponding receiving slot (1191).

12. The sampling component as described in any one of claims 1-4, characterized in that, The surface of the first circuit board (121) facing away from the isolation plate (11) has a fireproof layer (126).

13. The sampling component as claimed in claim 12, characterized in that, The fireproof layer (126) is made of mica paper.

14. An energy storage device, characterized in that, include: The battery module (20) includes multiple battery cells (21); The sampling component (10) according to any one of claims 1-12, wherein the isolation plate (11) covers the top of the battery module (20).

15. An energy storage system, characterized in that, The energy storage system includes the energy storage device (100) as described in claim 14.

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