Battery cell and battery pack

Abstract

The utility model discloses a single battery and a battery pack. The single battery comprises a shell with an opening and an accommodating cavity, a battery cell arranged in the accommodating cavity, a top cover assembly connected with the shell 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 supporting legs connected with the bracket body, the bracket body is arranged opposite to one end, facing the battery cell, of the liquid injection channel, each supporting leg is connected with one side, facing the battery cell, of the top cover assembly, and a gap is formed between every two adjacent supporting legs; and the information acquisition module is connected with the bracket body and is in signal connection with the battery cell. According to the technical scheme, the information acquisition module can be prevented from being directly scoured by the electrolyte, the probability that the information acquisition module is corroded, loosened and even dropped is reduced, and the accuracy and reliability of monitoring the state of the battery cell are improved.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a battery cell and battery pack. Background Technology

[0002] In the field of power battery technology, a Battery Management System (BMS) is used to closely monitor the battery status, preventing overcharging during charging and over-discharging during discharging. In a wireless BMS architecture (also known as a WBMS), individual battery cells are connected in series via wireless communication technology, eliminating the need for wiring harnesses. This not only improves communication convenience but also significantly reduces the cost of using wiring harnesses.

[0003] However, during the battery cell manufacturing process, a large amount of electrolyte needs to be rapidly injected into the battery cell. This electrolyte can easily impact the wireless BMS under the top cover. Moreover, during normal use, the free electrolyte will continuously wash over the wireless BMS module, causing it to be corroded, loosened, or even fall off. This seriously affects the normal function of the wireless BMS and reduces its accuracy and reliability in monitoring the battery cell status. Utility Model Content

[0004] The main purpose of this invention is to propose a battery cell and battery pack that aims to reduce the probability of existing information acquisition modules being easily corroded, loosened, or even falling off by the electrolyte inside the battery cell.

[0005] To achieve the above objectives, this utility model proposes a battery cell, comprising:

[0006] A housing having an opening and forming a receiving cavity;

[0007] A battery cell, wherein the battery cell is disposed within the receiving cavity;

[0008] A top cover assembly, which is connected to the housing and seals the opening, and the top cover assembly has a liquid injection channel;

[0009] An insulating support includes a support body and a plurality of legs connected to the support body; the support body is disposed opposite to the end of the liquid injection channel facing the battery cell, each of the legs is connected to the side of the top cover assembly facing the battery cell, and there is a gap between adjacent legs;

[0010] An information acquisition module is connected to the bracket body and is also connected to the battery cell signal.

[0011] In some embodiments, the top cover assembly includes a cover plate and an insulating base plate, the insulating base plate being disposed between the cover plate and the battery cell, and the insulating base plate being connected to the side of the top cover assembly facing the battery cell;

[0012] The injection channel includes a first through hole in the cover plate and a second through hole in the insulating base plate and opposite to the first through hole; the insulating base plate includes an insulating base plate body and a retaining portion connected to the side of the insulating base plate body facing away from the cover plate, the retaining portion is arranged around the second through hole, and the end of the retaining portion away from the insulating base plate body is connected to each of the support legs.

[0013] In some embodiments, the side of the enclosure portion facing away from the cover plate is a mounting surface, the area of ​​the mounting surface is S1, and the sum of the contact areas between each of the legs and the mounting surface is S2, satisfying 1 / 8S1<S2<S1.

[0014] In some embodiments, adjacent legs are spaced apart in the direction surrounding the second through hole, with the gap being between the adjacent legs.

[0015] In some embodiments, the insulating support further includes a flow guide that connects the support body to the side opposite to the top cover assembly.

[0016] In some embodiments, the housing has a length direction, and the information acquisition module extends along the length direction; the support leg includes alternating crests and troughs along the length direction, the bracket body is connected to the end of the support leg in the length direction, and the side of the crest facing away from the battery cell is connected to the top cover assembly; the information acquisition module is connected to the end of the bracket body facing away from the support leg in the length direction.

[0017] In some embodiments, the crest portion is provided with a connecting groove that extends along the length direction, and one end of the connecting groove in the length direction is disposed opposite to the end of the liquid injection channel facing the cell, and the other end of the connecting groove in the length direction is located on the side of the enclosure portion away from the liquid injection channel.

[0018] 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.

[0019] In some embodiments, the battery cell further includes a positive terminal and a negative terminal, the positive terminal and the negative terminal being disposed at a distance from each other on the cover plate, and the positive terminal and the negative terminal being electrically connected to the battery cell respectively;

[0020] 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.

[0021] 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.

[0022] 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.

[0023] This utility model also provides a battery pack, including the battery cells as described above.

[0024] 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

[0025] Figure 1 This is a disassembly diagram of one embodiment of the battery cell of this utility model;

[0026] Figure 2 This is a structural schematic diagram of an embodiment of the top cover assembly of this utility model;

[0027] Figure 3 This is a structural schematic diagram from another perspective of an embodiment of the top cover assembly of this utility model;

[0028] Figure 4 for Figure 3 Disassembly diagram of the top cover assembly;

[0029] Figure 5 This is a schematic diagram of the structure of an embodiment of the information acquisition module of this utility model;

[0030] Figure 6 for Figure 5 A cross-sectional schematic diagram of AA in the middle;

[0031] Figure 7 This is a disassembly diagram of an embodiment of the top cover assembly of this utility model;

[0032] Figure 8 This is a schematic diagram of the structure of an embodiment of the insulating bracket of this utility model;

[0033] Figure 9 for Figure 8 Cross-sectional schematic diagram of BB;

[0034] Figure 10 This is a schematic diagram of another embodiment of the insulating bracket of this utility model;

[0035] Figure 11 This is a structural schematic diagram of an embodiment of the insulating base plate of this utility model.

[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0037] The details of the reference numerals used in the above figures are as follows:

[0038] 100-Battery cell; 10-Casing; 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. Detailed Implementation

[0039] The solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0040] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment 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.

[0041] 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.

[0042] Furthermore, the use of terms such as "first" and "second" in this utility model 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 by this utility model.

[0043] Please refer to Figures 1 to 7 This application provides an embodiment of 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] Please continue to refer to this. Figure 3 , Figure 4 and Figure 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.

[0056] The liquid injection channel 301 includes a first through hole 3011 formed in the cover plate 31 and a second through hole 3012 formed in the insulating bottom plate 32 and disposed opposite to the first through hole 3011; the insulating bottom plate 32 includes an insulating bottom plate body 320 and a surrounding portion 321 connected to the side of the insulating bottom plate body 320 facing away from the cover plate 31. The surrounding portion 321 is disposed around the second through hole 3012, and one end of the surrounding portion 321 away from the insulating bottom plate body 320 is connected to each support leg 42.

[0057] During liquid injection, the electrolyte is injected from the first through hole 3011 and the second through hole 3012. The surrounding portion 321, as a constraint structure, changes the natural overflow state of the electrolyte. According to the flow law of fluids in a confined space, the electrolyte will accumulate within the area defined by the surrounding portion 321 and, driven by the pressure difference, gradually infiltrate each part of the battery cell 20 along the channel formed between the surrounding portion 321 and the battery cell 20, ensuring that the initial distribution of the electrolyte is more concentrated and orderly, and avoiding splashing everywhere, local liquid accumulation, or uneven infiltration.

[0058] In this embodiment, compared with other parts of the insulating bottom plate 32, the surrounding portion 321 has a raised structure, resulting in an increased thickness and a larger contact area. When connected to the support legs 42, it can disperse the force. The support legs 42 transmit the gravity, vibration impact force, etc. from the insulating bracket 40 and the battery cell 20. With the optimized bearing structure of the surrounding portion 321, the force is evenly dispersed to a larger area of the top cover assembly 30, ensuring the stability of the overall structure and withstanding mechanical interference during use.

[0059] In some embodiments, the surface of the surrounding portion 321 facing away from the cover plate 31 is an installation surface, the area of the installation surface is S1, and the sum of the contact areas between each support leg 42 and the installation surface is S2, satisfying 1 / 8S1 < S2 < S1.

[0060] In this embodiment, by defining that the sum S2 of the contact areas between each support leg 42 and the installation surface S1 satisfies 1 / 8S1 < S2 < S1, it is ensured that the connection between the support legs 42 and the surrounding portion 321 is stable and reliable, preventing the insulating bracket 40 from loosening and falling off, maintaining the stability of the internal electrolyte flow channel, ensuring the normal operation of the information collection module 50, reducing the potential failure hazards of the battery cell 100, and extending the service life.

[0061] And S2 < S1 ensures that there is a gap 421 for the electrolyte to flow between the support legs 42, while avoiding over - design of the support legs 42, controlling the material cost of the support legs 42. Since there is no need for extra materials to construct an overly large contact area, especially for the mass production of the battery cell 100, it can save costs. In addition, by reasonably utilizing the space of the installation surface of the surrounding portion 321, it does not occupy too much space of the core functional components such as the battery cell 20 and the electrolyte, which is beneficial to the miniaturization of the battery cell 100.

[0062] The present utility model will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and do not limit the scope of the present utility model.

[0063] A number of battery cells 100 are selected and divided into multiple groups. For example, there are 100 battery cells 100. Some are used as embodiments and some are used as comparative examples. Among them, the only difference between the battery cells 100 in the embodiments and the comparative examples is that the total contact area S2 between the feet 42 and the mounting surface S1 is different, and other conditions are the same.

[0064] Each group of battery cells 100 is subjected to a mechanical shock test (based on GB 38031-2020 Safety Requirements for Power Batteries for Electric Vehicles), and then the number of insulation brackets that fall off is observed using a CT scanning device to obtain the falling-off rate.

[0065] It should be noted that the criterion for falling off is: separation or cracking occurs between the feet 42 of the insulation bracket 40 and the enclosing part 321.

[0066] The test results are shown in Table 1:

[0067] <![CDATA[1 / 8S1(mm 2 )]]> <![CDATA[S2(mm 2 )]]> <![CDATA[S1(mm 2 )]]> Shedding rate (%) Example 1 1.3194 4.9100 10.5558 5 Example 2 1.3194 2.2056 10.5558 5 Example 3 1.3194 1.3924 10.5558 5 Comparative Example 1 1.3194 0.537 10.5558 90

[0068] Table 1

[0069] It can be obtained from Table 1 above that the total contact area S2 between the feet 42 of the present utility model and the mounting surface S1 satisfies 1 / 8S1 < S2 < S1, which can ensure that the feet 42 are firmly and reliably connected to the enclosing part 321, prevent the insulation bracket 40 from loosening and falling off.

[0070] In some embodiments, in the direction around the second through hole 3012, two adjacent feet 42 are arranged at intervals, and a gap is provided between the two adjacent feet 42.

[0071] In this embodiment, the feet 42 serve as the support着力点. Multiple spaced-apart feet 42 disperse the force and transmit it to the enclosing part 321 and the top cover assembly 30 as a whole. For example, under vibration conditions, each foot 42 is stressed cooperatively and buffers part of the vibration energy according to its own gap 421, avoiding stress concentration at a single point and causing structural damage, maintaining the shape stability of the insulation bracket 40, and ensuring the continuous effectiveness of its support and protection functions.

[0072] It should be noted that the number of feet 42 can be two, three or more than three, and can be selected and set according to actual situations. The present application does not make any further limitations.

[0073] Please refer to Figure 8 and Figure 9In 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.

[0074] 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.

[0075] 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.

[0076] 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 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, and 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] This utility model also provides a battery pack, including the battery cell 100 as described above. Since the battery pack adopts all the technical solutions of all embodiments of the battery cell 100 described above, the battery cell 100 of this utility model 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.

[0099] The above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. 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 utility model are still within the protection scope of this utility model.

Claims

1. A battery cell, characterized by, The battery monomer comprises: a shell having an opening and forming a containing cavity; an electric core arranged in the containing cavity; a top cover assembly connected with the shell and covering the opening, the top cover assembly being provided with a liquid injection channel; 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 electric core, each of the support legs being connected with one side of the top cover assembly facing the electric core, and the adjacent support legs having a gap therebetween; an information acquisition module connected with the support body and being signal connected with the electric core.

2. The battery cell of claim 1, wherein, The top cover assembly comprises a cover plate and an insulating bottom plate arranged between the cover plate and the electric core, and the insulating bottom plate is connected with one side of the top cover assembly facing the electric core; the liquid injection channel comprises a first through hole provided in the cover plate and a second through hole provided in the insulating bottom plate and arranged opposite to the first through hole; the insulating bottom plate comprises an insulating bottom plate body and a surrounding part connected with one side of the insulating bottom plate body facing away from the cover plate, the surrounding part being arranged around the second through hole, and one end of the surrounding part away from the insulating bottom plate body being connected with each of the support legs.

3. The battery cell of claim 2, wherein, One side of the surrounding part facing 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 of the support legs and the mounting surface is S2, and 1 / 8S1<S2<S1 is satisfied.

4. The battery cell of claim 2, wherein, In the direction around the second through hole, the adjacent two support legs are arranged with a gap therebetween.

5. The battery cell according to any one of claims 1 to 3, characterized in that, The insulating support further comprises a flow guiding part connected with one side of the support body opposite to the top cover assembly.

6. The battery cell according to claim 2 or 3, characterized in that, The shell has a length direction, the information acquisition module extends along the length direction; the support leg comprises a wave crest part and a wave trough part alternately arranged along the length direction, the support body is connected with the end of the support leg in the length direction, and one side of the wave crest part facing away from the electric core is connected with the top cover assembly; the information acquisition module is connected with one end of the support body in the length direction facing away from the support leg.

7. The battery cell of claim 6, wherein, The wave crest part is provided with a communication groove extending along the length direction, and one end of the communication groove in the length direction is arranged opposite to one end of the liquid injection channel facing the electric core, and the other end of the communication groove in the length direction is located on one side of the surrounding part facing away from the liquid injection channel.

8. The battery cell of any one of claims 1 to 3, wherein, The insulating support is bonded to the top cover assembly, or the insulating support is welded to the top cover assembly; the information acquisition module is integrally injection molded with the insulating support, or the information acquisition module is bonded to the insulating support.

9. The battery cell according to claim 2 or 3, characterized in that, The battery monomer further comprises a positive electrode column and a negative electrode column, the positive electrode column and the negative electrode column being arranged on the cover plate with a gap therebetween, and the positive electrode column and the negative electrode column being respectively electrically connected with the electric core. The information collection module further comprises a positive electrode lead wire and a negative electrode lead wire, the positive electrode lead wire is electrically connected with the positive electrode post, and the negative electrode lead wire is electrically connected with the negative electrode post.

10. The battery cell of claim 9, wherein, A positioning portion is protruded on one side of the insulating bottom plate towards the battery cell, the positioning portion is located between the positive electrode post and the negative electrode post, and the positioning portion is provided with a positioning hole.

11. The battery cell of claim 10, wherein, The distance from the surface of the information collection module away from the support to the cover plate is not greater than the distance from the surface of the insulating bottom plate away from the cover plate to the cover plate.

12. A battery pack, characterized by, A battery cell as claimed in any one of claims 1 to 11.

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