Battery cell and battery pack

Abstract

Disclosed in the present application are a battery cell and a battery pack. The battery cell comprises a casing having an opening and having an accommodating cavity formed therein, a cell arranged in the accommodating cavity, a top cover assembly connected to the casing and covering the opening, an insulating bracket arranged in the accommodating cavity, and an information acquisition module. The top cover assembly is provided with a liquid injection channel. The insulating bracket comprises a bracket body and a plurality of support legs connected to the bracket body, wherein the bracket body is arranged opposite the end of the liquid injection channel facing the cell, the support legs are all connected to the side of the top cover assembly facing the cell, and there is a gap between every two adjacent support legs. The information acquisition module is connected to the bracket body, and the information acquisition module is in signal connection with the cell. The technical solution of the present application can prevent an electrolyte from directly washing the information acquisition module, reduce the probability of the information acquisition module being corroded, loosened, or even falling off, and improve the accuracy and reliability of monitoring the state of the cell.

Description

Battery cell and battery pack TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, in particular to a battery cell and a battery pack. BACKGROUND

[0002] In the technical field of power batteries, a BMS (Battery Management System) is arranged to monitor the state of the battery closely, so as to prevent overcharging of the battery during charging and overdischarging of the battery during discharging. In a wireless BMS technical architecture (also referred to as WBMS, Wireless Battery Management System), each battery cell is connected in series through wireless communication technology, without the need for wiring harnesses. This not only improves communication convenience, but also significantly reduces the use cost of wiring harnesses.

[0003] However, in the production process of the battery cell, a large amount of electrolyte needs to be injected into the battery cell quickly, and the electrolyte is easy to impact the wireless BMS under the top cover. Moreover, in the normal use process, the free electrolyte will also continuously flush the wireless BMS module, resulting in corrosion, loosening or even falling of the wireless BMS module, which seriously affects the normal function of the wireless BMS and reduces the accuracy and reliability of the state monitoring of the battery cell.

[0004] SUMMARY

[0005] The main purpose of the present application is to provide a battery cell and a battery pack, which can reduce the probability of corrosion, loosening or even falling of the existing information acquisition module caused by the electrolyte in the battery cell.

[0006] To achieve the above purpose, the present application provides a battery cell, which comprises:

[0007] A shell having an opening and forming an accommodating cavity;

[0008] A battery cell arranged in the accommodating cavity;

[0009] A top cover assembly connected with the shell and covering the opening, the top cover assembly being provided with a liquid injection channel;

[0010] An insulating support comprising a support body and a plurality of support legs connected with the support body, the support body being arranged opposite to one end of the liquid injection channel facing the battery cell, each support leg being connected to one side of the top cover assembly facing the battery cell, and the adjacent support legs having a gap therebetween;

[0011] An information collection module is connected to the support body, and the information collection module is connected to the signal of the battery cell.

[0012] In some embodiments, the top cover assembly comprises a cover plate and an insulating bottom plate, the insulating bottom plate is arranged between the cover plate and the battery cell, and the insulating bottom plate is connected to the side of the top cover assembly facing the battery cell;

[0013] The liquid injection channel comprises a first through hole arranged in the cover plate, and a second through hole arranged in the insulating bottom plate and opposite to the first through hole; the insulating bottom plate comprises an insulating bottom plate body and a surrounding part connected to the side of the insulating bottom plate body away from the cover plate, the surrounding part is arranged around the second through hole, and the end of the surrounding part away from the insulating bottom plate body is connected to each leg.

[0014] In some embodiments, the side of the surrounding part away from the cover plate is a mounting surface, the area of the mounting surface is S1, the sum of the contact areas between each leg and the mounting surface is S2, and 1 / 8S1

[0015] In some embodiments, in the direction around the second through hole, two adjacent legs are arranged at intervals, and a gap is arranged between the two adjacent legs.

[0016] In some embodiments, the insulating support further comprises a flow guide part, the flow guide part is connected to the side of the support body opposite to the top cover assembly.

[0017] In some embodiments, the flow guide part has a central axis, and in the direction from the central axis to the edge of the flow guide part, the distance between the flow guide part and the liquid injection channel gradually increases.

[0018] In some embodiments, the shell has a length direction, the information collection module extends along the length direction; the leg comprises a wave peak part and a wave valley part arranged alternately along the length direction, the support body is connected to the end of the leg in the length direction, the side of the wave peak part away from the battery cell is connected to the top cover assembly; the information collection module is connected to the end of the support body in the length direction away from the leg.

[0019] In some embodiments, the wave peak part is provided with a communication groove, the communication groove extends along the length direction, and one end of the communication groove in the length direction is arranged opposite to the end of the liquid injection channel facing the battery cell, and the other end of the communication groove in the length direction is located on the side of the surrounding part away from the liquid injection channel.

[0020] In some embodiments, the connecting groove is a through hole penetrating two adjacent troughs; or the connecting groove is a trench connecting two adjacent troughs.

[0021] In some embodiments, the insulating bracket is bonded to the top cover assembly, or the insulating bracket is welded to the top cover assembly; the information acquisition module is integrally injection molded with the insulating bracket, or the information acquisition module is bonded to the insulating bracket.

[0022] In some embodiments, the battery cell further includes a positive terminal and a negative terminal, the positive terminal and the negative terminal are spaced apart on the cover plate, and the positive terminal and the negative terminal are electrically connected to the battery cell respectively;

[0023] The information acquisition module also includes a positive wire and a negative wire, wherein the positive wire is electrically connected to the positive terminal and the negative wire is electrically connected to the negative terminal.

[0024] In some embodiments, the insulating base plate has a positioning portion protruding on one side facing the battery cell, the positioning portion being located between the positive terminal and the negative terminal, and the positioning portion having a positioning hole.

[0025] In some embodiments, the distance from the surface of the information acquisition module away from the bracket to the cover plate is not greater than the distance from the surface of the insulating base plate away from the cover plate to the cover plate.

[0026] In some embodiments, the information acquisition module includes a wireless communication unit and an insulating layer, the insulating layer covering the surface of the wireless communication unit, and the wireless communication unit being used to wirelessly transmit data information of the battery cell.

[0027] This application also provides a battery pack, including a housing and battery cells as described above, wherein the battery cells are installed in the housing.

[0028] The battery cell provided in this application has an insulating support including a support body and a support leg connected to one side of the support body. The support leg is connected to the side of the top cover assembly facing the battery cell. There is a gap between the support leg and the top cover assembly to allow the electrolyte to flow. The information acquisition module is connected to the support body and is connected to the battery cell signal, so that the insulating support has a stable installation structure at the top cover assembly. This ensures that the electrolyte can smoothly enter the battery cell through the gap during the electrolyte injection process without being hindered by the presence of the insulating support. It also enhances the overall stability of the insulating support, thereby reducing the probability of the information acquisition module loosening or even falling off under the impact of the electrolyte, and improving the accuracy and reliability of its monitoring of the battery cell status. Attached Figure Description

[0029] Figure 1 is a disassembly diagram of a battery cell according to an embodiment of this application;

[0030] Figure 2 is a structural schematic diagram of an embodiment of the top cover assembly of this application;

[0031] Figure 3 is a structural schematic diagram of an embodiment of the top cover assembly of this application from another perspective;

[0032] Figure 4 is a disassembly diagram of the top cover assembly in Figure 3;

[0033] Figure 5 is a structural schematic diagram of an embodiment of the information collection module of this application;

[0034] Figure 6 is a cross-sectional view of AA in Figure 5;

[0035] Figure 7 is a disassembly diagram of an embodiment of the top cover assembly of this application;

[0036] Figure 8 is a structural schematic diagram of an embodiment of the insulating bracket of this application;

[0037] Figure 9 is a cross-sectional view of BB in Figure 8;

[0038] Figure 10 is a structural schematic diagram of another embodiment of the insulating bracket of this application;

[0039] Figure 11 is a structural schematic diagram of an embodiment of the insulating base plate of this application;

[0040] Figure 12 is a structural schematic diagram of an embodiment of the battery pack of this application.

[0041] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0042] The detailed reference numerals in the above figures are as follows: 100-Battery cell; 10-Housing; 11-Opening; 12-Receiving cavity; 20-Cell; 30-Top cover assembly; 301-Injection channel; 3011-First through hole; 3012-Second through hole; 31-Cover plate; 32-Insulating base plate; 320-Insulating base plate body; 321-Enclosure part; 322-Positioning part; 323-Positioning hole; 40-Insulating bracket; 401-Crest part; 402-Crust part; 403-Connecting groove; 41-Bracket body; 411-Flow guide part; 42-Feet; 421-Gap; 50-Information acquisition module; 51-Wireless communication unit; 52-Insulating layer; 53-Positive electrode wire; 54-Negative electrode wire; 60-Positive electrode post; 70-Negative electrode post; 200-Battery pack; 201-Box.

[0043] Detailed Implementation of This Application

[0044] The solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments in this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0045] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0046] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0047] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0048] Please refer to Figures 1 to 7. One embodiment of this application proposes a battery cell 100, including a housing 10, a battery cell 20, a top cover assembly 30, an insulating support 40, and an information acquisition module 50. The housing 10 has an opening 11 and forms a receiving cavity 12. The battery cell 20 is disposed in the receiving cavity 12. The top cover assembly 30 is connected to the housing 10 and covers the opening 11. The top cover assembly 30 has an injection channel 301 for injecting electrolyte into the battery cell 20. The insulating support 40 includes a support body 41 and a plurality of legs 42 connected to one side of the support body 41. The support body 41 and the end of the injection channel 301 facing the battery cell 20 are arranged opposite each other. Each leg 42 is connected to the side of the top cover assembly 30 facing the battery cell 20, and there is a gap 421 between adjacent legs 42 for electrolyte flow.

[0049] The information acquisition module 50 is connected to the support body 41 and is signal-connected to the battery cell 20 so that the battery cell 20 can supply power to the information acquisition module 50. The information acquisition module 50 can be connected to the side of the support body 41 away from the top cover assembly 30, or it can be inserted through the support body 41 to avoid the liquid injection channel 301, thereby further improving the stability of the connection between the information acquisition module 50 and the support body 41.

[0050] In this embodiment, the connection between the support leg 42 and the top cover assembly 30 provides a support point for the insulating bracket 40, dispersing the external force on the insulating bracket 40, making the overall force on the insulating bracket 40 more even, and the insulating bracket 40 can be firmly fixed on the top cover assembly 30 without easily displacing or shaking, thereby enhancing its stability.

[0051] It should be understood that the connection between the support leg 42 and the top cover assembly 30 can be a reliable connection method such as hot-melt fixing or adhesive bonding, to ensure the strength of the connection and to ensure stability under various working conditions.

[0052] It should be noted that the support leg 42 and the bracket body 41 can be separate structures, which can be connected by reliable connection methods such as hot melt fixing and adhesive bonding to ensure the strength of the connection; the support leg 42 and the bracket body 41 can also be an integral structure with high overall structural strength.

[0053] Furthermore, the gap 421 between the legs 42 creates favorable conditions for the electrolyte to smoothly enter the cell 20. Specifically, during the electrolyte injection process, the electrolyte needs to be quickly and evenly filled around the cell 20. If the insulating support 40 did not have such a gap 421 structure, it might obstruct the flow path of the electrolyte, resulting in the electrolyte not being able to fully wet the cell 20. The design of this application ensures that the electrolyte can smoothly pass through the gap 421 to reach all parts of the cell 20, which helps the cell 20 to fully perform.

[0054] During the operation of the battery cell 100, the electrolyte is in a flowing state, which will exert a certain impact force on the surrounding components. The stable installation structure of the insulating bracket 40 and the reasonable design of the support feet 42 of this application can effectively resist the impact of the electrolyte and prevent itself from loosening, thereby maintaining stability during long-term use and ensuring the safe and reliable operation of the battery cell 100.

[0055] In this embodiment, the information acquisition module 50 includes a wireless communication unit 51 and an insulating layer 52. The insulating layer 52 covers the surface of the wireless communication unit 51. The wireless communication unit 51 is used to wirelessly transmit data information of the battery cell 20. During assembly, the insulating layer 52 can be first put on the wireless communication unit 51, and then the information acquisition module 50 can be connected to the surface of the bracket body 41.

[0056] Preferably, the information acquisition module 50 is positioned so that its support body 41 faces away from the surface of the top cover assembly 30, and the wireless communication unit 51 is covered with an insulating layer 52. This design effectively avoids the adverse effects of the electrolyte on the information acquisition module 50 in two ways. First, the layout keeps the information acquisition module 50 relatively far away from the area directly washed by the electrolyte, reducing the chance of contact. Second, the insulating layer 52 acts as a direct protective barrier, preventing corrosive components in the electrolyte from eroding the wireless communication unit 51 and also resisting the physical pulling forces caused by the electrolyte impact, reducing the risk of the information acquisition module 50 becoming loose or falling off, thereby ensuring that it can continuously and accurately monitor the status of the battery cell 20.

[0057] It should be noted that, in addition to the wireless communication unit 51, the information acquisition module 50 also includes acquisition units (such as voltage acquisition units, temperature acquisition units, etc.) for acquiring information of the battery cell 20. The acquisition units are also covered with an insulating layer 52 to avoid adverse effects caused by the electrolyte.

[0058] It should be noted that the wireless communication unit 51 of the information acquisition module 50 can transmit signals from the inside of the battery cell 100 to the outside of the battery cell 100. For example, the signal can be transmitted through the metal housing 10 by integrating the antenna with the aluminum nail.

[0059] In this embodiment, the information acquisition module 50 can be wrapped with PP plastic (polypropylene plastic), thermally conductive insulating foam, surface-sprayed insulating paint, or electrolyte-resistant adhesive to form an insulating layer 52, thereby providing insulation. For example, insulating paint can be used, utilizing ultraviolet light (UV) as the curing energy, to form a robust insulating layer 52 on the surface of the information acquisition module 50 through a specific UV coating. The UV coating mainly consists of oligomers, reactive diluents, photoinitiators, and other additives. These components undergo a chemical reaction under ultraviolet light irradiation, rapidly curing to form a coating, offering advantages such as high efficiency, environmental friendliness, high coating quality, and precise controllability.

[0060] Please continue to refer to Figures 3, 4 and 7. In some embodiments, the top cover assembly 30 includes a cover plate 31 and an insulating base plate 32. The insulating base plate 32 is disposed between the cover plate 31 and the battery cell 20, and the insulating base plate 32 is attached to the side of the top cover assembly 30 facing the battery cell 20.

[0061] The injection channel 301 includes a first through hole 3011 opened in the cover plate 31 and a second through hole 3012 opened in the insulating base plate 32 and disposed opposite to the first through hole 3011; the insulating base plate 32 includes an insulating base plate body 320 and a blocking portion 321 connected to the side of the insulating base plate body 320 facing away from the cover plate 31. The blocking portion 321 is disposed around the second through hole 3012, and the end of the blocking portion 321 away from the insulating base plate body 320 is connected to each support leg 42.

[0062] During electrolyte injection, the electrolyte is injected through the first through-hole 3011 and the second through-hole 3012. The enclosure 321 acts as a constraint structure, altering the natural flow of the electrolyte. Based on the fluid flow characteristics within a confined space, the electrolyte accumulates within the area defined by the enclosure 321 and, driven by the pressure difference, gradually wets all parts of the battery cell 20 along the channel formed between the enclosure 321 and the battery cell 20. This ensures a more concentrated and orderly initial distribution of the electrolyte, preventing splashing, localized accumulation, or uneven wetting.

[0063] In this embodiment, the enclosure 321, due to its raised structure compared to other parts of the insulating base plate 32, has increased thickness and a larger contact area, which can distribute the force when connected to the support leg 42. The support leg 42 transmits the gravity, vibration and impact forces from the insulating support 40 and the battery cell 20, which are evenly distributed to the larger top cover assembly 30 area by the optimized load-bearing structure of the enclosure 321, ensuring the stability of the overall structure and resisting mechanical interference during use.

[0064] In some embodiments, the side of the enclosure 321 facing away from the cover plate 31 is the mounting surface, the area of ​​the mounting surface is S1, and the total contact area between each support leg 42 and the mounting surface is S2, satisfying 1 / 8S1<S2<S1.

[0065] In this embodiment, by limiting the total contact area S2 between each support leg 42 and the mounting surface S1 to satisfy 1 / 8S1<S2<S1, it is ensured that the support leg 42 and the enclosure part 321 are firmly and reliably connected, preventing the insulating bracket 40 from loosening or falling off, maintaining the stability of the internal electrolyte flow channel, ensuring the normal operation of the information acquisition module 50, reducing the potential for battery cell 100 failure, and extending the service life.

[0066] S2 < S1 ensures that the support 42 can form a gap 421 for electrolyte flow, while avoiding over-design of the support 42 and controlling the material cost of the support 42. Since there is no need for extra material to build an ultra-large contact area, it can save costs, especially for the mass production of battery cells 100. In addition, by making reasonable use of the mounting surface space of the enclosure 321, without occupying too much space for core functional components such as the battery cell 20 and electrolyte, it is beneficial to achieve miniaturization of the battery cell 100.

[0067] The present application will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and do not limit the scope of the present application.

[0068] Select a number of battery cells 100 and divide them into multiple groups, such as 100 battery cells 100, some of which are used as examples and some as comparative examples. The only difference between the battery cells 100 in the examples and the comparative examples is the size of the total contact area S2 between the support 42 and the mounting surface S1; all other conditions are the same.

[0069] Mechanical impact tests were performed on 100 individual battery cells in each group (based on GB 38031-2020 Safety Requirements for Power Batteries for Electric Vehicles). Then, CT scanning equipment was used to observe the number of insulation brackets that detached, and the detachment rate was obtained.

[0070] It should be noted that the criteria for detachment are: separation or cracking between the support leg 42 of the insulating bracket 40 and the enclosure part 321.

[0071] The test results are shown in Table 1:

[0072] Table 1

[0073] As can be seen from Table 1 above, the total contact area S2 between the support leg 42 and the mounting surface S1 of this application satisfies 1 / 8S1<S2<S1, which can ensure that the support leg 42 and the enclosure part 321 are firmly and reliably connected, and prevent the insulating bracket 40 from loosening or falling off.

[0074] In some embodiments, in the direction surrounding the second through hole 3012, two adjacent legs 42 are spaced apart, with a gap between the two adjacent legs 42.

[0075] In this embodiment, the support legs 42 serve as the supporting force points, and multiple spaced support legs 42 disperse and transmit the force to the enclosure 321 and the entire top cover assembly 30. For example, under vibration conditions, each support leg 42 works together to bear the force and buffers part of the vibration energy according to its own gap 421, avoiding stress concentration at a single point that could cause structural damage, maintaining the shape stability of the insulating support 40, and ensuring its continued effective support and protection functions.

[0076] It should be noted that the number of legs 42 can be two, three or more, and can be set according to the actual situation. This application does not impose any restrictions.

[0077] Please refer to Figures 8 and 9. In some embodiments, the insulating support 40 further includes a flow guide 411, which connects the support body 41 to the side opposite to the top cover assembly 30 and is used to guide the flow of electrolyte.

[0078] When the electrolyte is injected into the internal space of the cell 20 through the injection channel 301, the guide part 411 changes the original state of natural diffusion and disordered flow of the electrolyte, thereby creating a clear flow trajectory for the electrolyte and accurately guiding the electrolyte to the required wetting area of ​​the cell 20. This promotes the rapid and uniform penetration of the electrolyte into all layers and gaps of the cell 20, ensuring that all parts of the cell 20 can contact the electrolyte in a timely and sufficient manner, providing a stable and consistent material basis for the electrochemical reaction inside the cell 20.

[0079] In this embodiment, the flow guide 411 has a central axis. From the central axis to the edge of the flow guide 411, the distance between the flow guide 411 and the liquid injection channel 301 gradually increases, that is, it is inclined from the liquid injection channel 301 to the support body 41. The inclined flow guide 411 provides the electrolyte with a sloping channel in accordance with the direction of gravity. The electrolyte will flow faster along the surface of the flow guide 411 and flow more efficiently to the cell 20 area, which helps the electrolyte to achieve a better diffusion effect.

[0080] Please refer to Figure 10. In some embodiments, the housing 10 has a length direction X, and the information acquisition module 50 extends along the length direction X. The support leg 42 includes a crest portion 401 and a trough portion 402 that are alternately arranged along the length direction X. The bracket body 41 is connected to the end of the support leg 42 in the length direction X. The side of the crest portion 401 facing away from the battery cell 20 is connected to the top cover assembly 30. The information acquisition module 50 is connected to the end of the bracket body 41 facing away from the support leg 42 in the length direction X.

[0081] In this embodiment, the support leg 42 features multiple continuous crests 401 and troughs 402, with the side of the crest 401 facing away from the cell 20 connected to the top cover assembly 30, thus constructing a stable and reasonable support structure. The crest 401 contacts the top cover assembly 30, forming a multi-point support structure, which disperses the forces borne by the insulating support 40 from the cell 20, itself, and any external forces it may experience. This results in relatively small forces at each contact point, effectively preventing excessive local stress that could lead to loosening or damage to the connection points. This ensures the stability of the insulating support 40 on the top cover assembly 30 and lays the foundation for the stability of the entire battery's internal structure.

[0082] The design of the troughs 402 provides channels for electrolyte flow. After the electrolyte is injected from the injection channel 301, it flows along these troughs 402. Moreover, the continuous troughs 402 can guide the electrolyte to be distributed more evenly inside the battery. The electrolyte can spread along the troughs 402 to all parts of the cell 20, avoiding obstruction of electrolyte flow or local accumulation, ensuring that the cell 20 is fully and evenly wetted, and meeting the requirements of electrolyte distribution for the electrochemical reaction inside the cell 20.

[0083] Furthermore, the insulating support 40 of this application has a wave-like structure, which has a certain elastic buffering capacity. When the battery is subjected to external vibration, impact, etc., the crest 401 and trough 402 will undergo moderate compression or stretching deformation to absorb and buffer some energy through their own elastic deformation, thereby reducing the impact force transmitted to the cell 20 and other internal components, protecting the cell 20 and other key components from mechanical damage, and maintaining the integrity of the overall battery structure and the stability of its performance.

[0084] In some embodiments, the crest portion 401 is provided with a connecting groove 403, which extends along the length direction X. One end of the connecting groove in the length direction X is disposed opposite to the end of the liquid injection channel 301 facing the cell 20, and the other end of the connecting groove 403 in the length direction X is located on the side of the enclosure portion 321 away from the liquid injection channel 301.

[0085] In this embodiment, the presence of the connecting groove 403 expands the flow path of the electrolyte, adding branch channels to the original flow channel formed by the trough 402. When the electrolyte is injected from the injection channel 301, it will flow naturally along the trough 402. These newly added connecting grooves 403 provide the electrolyte with more selectable branches, allowing the electrolyte to move more flexibly inside the battery. This further guides the electrolyte to penetrate into every corner of the cell 20, ensuring that the electrolyte can fully and evenly wet the cell 20, meeting the requirements of the electrochemical reaction inside the cell 20 for a sufficient and balanced distribution of the electrolyte.

[0086] It should be noted that the connecting groove 403 can be a through hole that penetrates two adjacent troughs 402, or it can be a 402 groove that connects two adjacent troughs. As long as it can achieve the purpose of power electrolyte flow, this application does not limit it.

[0087] In some embodiments, the insulating bracket 40 is bonded to the top cover assembly 30, or the insulating bracket 40 is welded to the top cover assembly 30; the information acquisition module 50 is integrally injection molded with the insulating bracket 40, or the information acquisition module 50 is bonded to the insulating bracket 40.

[0088] The insulating support 40 and the top cover assembly 30 are bonded together using an adhesive, leveraging the adhesive properties to achieve a stable bond. Adhesive molecules can penetrate the microstructures such as pores and depressions on the surfaces of the support body 41 and the information acquisition module 50. After the adhesive cures, strong adhesion is formed between the two through interactions such as van der Waals forces and chemical bonds, firmly fixing the information acquisition module 50 to the support body 41. This connection method ensures that the information acquisition module 50 will not easily shift or loosen under various operating conditions, including normal battery operation, vibration, impact, and thermal expansion and contraction, guaranteeing that it remains in an accurate working position and maintains stable data acquisition and transmission functions.

[0089] It should be noted that the adhesive is typically selected from materials with good insulation properties and resistance to electrolyte corrosion, such as epoxy resin and silicone rubber adhesives. In the complex electrical environment inside the battery, it effectively blocks abnormal current conduction paths between the support body 41 and the information acquisition module 50, preventing short circuits caused by accidental contact. It also prevents moisture and other corrosive components in the electrolyte from penetrating into the adhesive layer, avoiding loss of adhesion and insulation properties due to water absorption, swelling, dissolution, or chemical reactions.

[0090] The information acquisition module 50 and the insulating bracket 40 are integrally injection molded, forming a seamless whole structure. Compared with other connection methods, there are no issues with loosening or separation at the connection interface. Under conditions of external force, vibration, or temperature changes, this connection method can maintain the positional stability of the information acquisition module 50, ensuring its normal operation. Furthermore, since the insulating material is directly wrapped around the information acquisition module 50 through injection molding, a uniform and reliable insulation layer is provided, effectively preventing electrical problems such as current leakage and short circuits.

[0091] Of course, in other embodiments, the insulating bracket 40 and the top cover assembly 30 can be connected by welding, or the information acquisition module 50 and the insulating bracket 40 can be connected by adhesive bonding. This application embodiment does not limit this.

[0092] In some embodiments, the battery cell 100 further includes a positive terminal 60 and a negative terminal 70, which are spaced apart on the cover plate 31 and are electrically connected to the battery cell 20 respectively.

[0093] The information acquisition module 50 also includes a positive wire 53 and a negative wire 54. The positive wire 53 is electrically connected to the positive terminal 60, and the negative wire 54 is electrically connected to the negative terminal 70.

[0094] In this embodiment, the positive terminal 60 is electrically connected to the positive terminal of the battery cell 20, and the negative terminal 70 is electrically connected to the negative terminal of the battery cell 20, thus establishing a smooth flow channel for electrons between the inside of the battery cell 20 and the external circuit. The connections between the positive terminal wire 53, the negative terminal wire 54, and the positive terminal 60 and negative terminal 70 constitute the input circuit of the information acquisition module 50, ensuring efficient and reliable power transmission and enabling real-time and accurate monitoring of the battery cell 20's status.

[0095] Please refer to Figure 11. In some embodiments, the insulating base plate 32 has a positioning part 322 protruding on the side facing the battery cell 20. The positioning part 322 is located between the positive electrode post 60 and the negative electrode post 70, and the positioning part 322 has a positioning hole 323.

[0096] The positioning part 322 is located between the positive terminal 60 and the negative terminal 70. The positioning part 322 has a positioning hole 323. Its specific position provides a clear guide and positioning reference point for the positive wire 53 or the negative wire 54. This allows the operator to more conveniently and accurately place the positive wire 53 or the negative wire 54 through the positioning hole 323 during the assembly process, avoiding misalignment or tangling of the wires, ensuring the neatness and accuracy of the circuit connection, and improving assembly efficiency and quality.

[0097] Furthermore, the presence of the positioning part 322 and the positioning hole 323 can effectively regulate the direction of the wires, allowing the wires to pass through in an orderly manner within a limited space, preventing them from being scattered randomly inside the battery and interfering with other components, ensuring the compactness and rationality of the internal structure of the battery, reserving sufficient space for other key components, and helping to maintain the stability of the overall battery structure.

[0098] In some embodiments, the distance from the surface of the information acquisition module 50 away from the bracket to the cover plate 31 is not greater than the distance from the surface of the insulating base plate 32 away from the cover plate 31 to the cover plate 31.

[0099] Among them, the cover plate 31 usually has high structural strength and can resist mechanical impact from the outside to a certain extent. The space between the cover plate 31 and the battery cell 20 of the information acquisition module 50 can reduce the direct damage to the battery when it is subjected to accidental collisions, squeezing, etc., and ensure that its normal operation is not affected by external physical factors.

[0100] The insulating base plate 32 plays a crucial role in blocking current conduction between the battery cell 20 and the cover plate 31. It has good insulation performance, which prevents accidental electrical connection between the information acquisition module 50 and the battery cell 20 or other potentially conductive components due to excessive distance. This further ensures the independence and safety of the internal electrical circuit of the battery and prevents electrical faults such as short circuits.

[0101] In this embodiment, the information acquisition module 50 is positioned relatively closer to the cover plate 31 and at a distance no greater than the distance from the surface of the insulating base plate 32 away from the cover plate 31 to the cover plate 31. In the limited internal space of the battery, such a layout helps to optimize the distribution of various components, avoids the information acquisition module 50 protruding excessively and crowding out the space around the cell 20 and other key areas, ensures that the electrolyte has enough space to evenly wet the cell 20, and also reserves suitable layout space for other auxiliary components inside the battery, maintaining the rationality and compactness of the overall internal space layout of the battery, so that each component can perform its own function and work together to ensure the normal operation of the battery.

[0102] Please refer to Figure 12. This application also provides a battery pack 200, including a housing 201 and the battery cells 100 as described above, with the battery cells 100 installed inside the housing 201. Since the battery pack 200 adopts all the technical solutions of all embodiments of the battery cells 100 described above, the battery pack 200 of this application also has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0103] The above embodiments of this application are merely examples for clear illustration and are not intended to limit the implementation of this application. Those skilled in the art can make other variations or modifications based on the above description. It is impossible to exhaustively list all possible implementations here. All obvious variations or modifications derived from the technical solutions of this application are still within the protection scope of this application.

Claims

1. A battery cell (100), wherein, include: A housing (10) having an opening (11) and forming a receiving cavity (12); A battery cell (20) is disposed within the receiving cavity (12); Top cover assembly (30), the top cover assembly (30) is connected to the housing (10) and covers the opening (11), the top cover assembly (30) is provided with a liquid injection channel (301); An insulating support (40) includes a support body (41) and a plurality of legs (42) connected to the support body (41); the support body (41) is disposed opposite to the end of the liquid injection channel (301) facing the battery cell (20), each of the legs (42) is connected to the side of the top cover assembly (30) facing the battery cell (20), and there is a gap (421) between adjacent legs (42); Information acquisition module (50) is connected to the bracket body (41) and is signal-connected to the battery cell (20).

2. The battery cell (100) according to claim 1, wherein, The top cover assembly (30) includes a cover plate (31) and an insulating base plate (32). The insulating base plate (32) is disposed between the cover plate (31) and the battery cell (20), and the insulating base plate (32) is connected to the side of the top cover assembly (30) facing the battery cell (20). The injection channel (301) includes a first through hole (3011) opened in the cover plate (31) and a second through hole (3012) opened in the insulating base plate (32) and disposed opposite to the first through hole (3011); the insulating base plate (32) includes an insulating base plate body (320) and a retaining portion (321) connected to the side of the insulating base plate body (320) facing away from the cover plate (31), the retaining portion (321) is disposed around the second through hole (3012), and the end of the retaining portion (321) away from the insulating base plate body (320) is connected to each of the support legs (42).

3. The battery cell (100) according to claim 2, wherein, The side of the enclosure (321) facing away from the cover plate (31) is the mounting surface, the area of ​​the mounting surface is S1, and the total contact area between each of the legs (42) and the mounting surface is S2, satisfying 1 / 8S1<S2<S1.

4. The battery cell (100) according to claim 2, wherein, In the direction surrounding the second through hole (3012), two adjacent legs (42) are spaced apart, and the gap (421) is provided between the two adjacent legs (42).

5. The battery cell (100) according to any one of claims 1 to 3, wherein, The insulating support (40) also includes a flow guide (411) which connects the support body (41) to the side opposite to the top cover assembly (30).

6. The battery cell (100) according to claim 5, wherein, The flow guide (411) has a central axis, and the distance between the flow guide (411) and the injection channel (301) gradually increases from the central axis to the edge of the flow guide (411).

7. The battery cell (100) according to claim 2 or 3, wherein, The housing (10) has a length direction, and the information acquisition module (50) extends along the length direction; the support leg (42) includes alternating crests (401) and troughs (402) along the length direction, the bracket body (41) is connected to the end of the support leg (42) in the length direction, and the side of the crest (401) facing away from the battery cell (20) is connected to the top cover assembly (30); the information acquisition module (50) is connected to the end of the bracket body (41) facing away from the support leg (42) in the length direction.

8. The battery cell (100) according to claim 7, wherein, The crest portion (401) is provided with a connecting groove (403), the connecting groove (403) extends along the length direction, and one end of the connecting groove (403) in the length direction is opposite to the end of the liquid injection channel (301) facing the cell (20), and the other end of the connecting groove (403) in the length direction is located on the side of the enclosure portion (321) away from the liquid injection channel (301).

9. The battery cell (100) according to claim 7, wherein, The connecting groove (403) is a through hole that penetrates two adjacent troughs (402); or the connecting groove (403) is a groove that connects two adjacent troughs (402).

10. The battery cell (100) according to any one of claims 1 to 3, wherein, The insulating bracket (40) is bonded to the top cover assembly (30), or the insulating bracket (40) is welded to the top cover assembly (30); the information acquisition module (50) is integrally injection molded with the insulating bracket (40), or the information acquisition module (50) is bonded to the insulating bracket (40).

11. The battery cell (100) according to claim 2 or 3, wherein, The battery cell (100) further includes a positive terminal (60) and a negative terminal (70), the positive terminal (60) and the negative terminal (70) are spaced apart on the cover plate (31), and the positive terminal (60) and the negative terminal (70) are electrically connected to the battery cell (20) respectively; The information acquisition module (50) further includes a positive electrode wire (53) and a negative electrode wire (54). The positive electrode wire (53) is electrically connected to the positive terminal (60), and the negative electrode wire (54) is electrically connected to the negative terminal (70).

12. The battery cell (100) according to claim 11, wherein, The insulating base plate (32) has a positioning part (322) protruding on the side facing the battery cell (20). The positioning part (322) is located between the positive terminal (60) and the negative terminal (70). The positioning part (322) has a positioning hole (323).

13. The battery cell (100) according to claim 12, wherein, The distance from the surface of the information acquisition module (50) away from the bracket to the cover plate (31) is no greater than the distance from the surface of the insulating base plate (32) away from the cover plate (31) to the cover plate (31).

14. The battery cell (100) according to claim 1, wherein, The information acquisition module (50) includes a wireless communication unit (51) and an insulating layer (52). The insulating layer (52) covers the surface of the wireless communication unit (51), and the wireless communication unit (51) is used to wirelessly transmit the data information of the battery cell (20).

15. A battery pack (200), wherein, It includes a housing (201) and a battery cell (100) as claimed in any one of claims 1 to 14, the battery cell (100) being installed inside the housing (201).

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