Fluid replacement system

Abstract

The utility model relates to battery technology field, specifically disclose the liquid supplementing system. The system includes detection module, heating module and liquid supplementing battery, and detection module communication connection is in heating module, and heating module is installed in liquid supplementing battery, and the detection end of detection module is connected on liquid supplementing battery, and detection module is used for controlling heating module to heat liquid supplementing battery after monitoring the capacity reduction of liquid supplementing battery, and liquid supplementing battery is provided with sealed bag, and the sealed bag is filled with supplementary liquid, and the sealed bag is provided with opening, and the opening is closed and is provided with adhesive layer, and the adhesive layer opens the opening when being heated. The system realizes the real -time monitoring to the battery, and accurate liquid supplementing. And do not need to dismount the battery also can not damage the battery shell, convenient operation, and do not affect the subsequent use of the battery.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a liquid replenishment system. Background Technology

[0002] Lithium-ion batteries, as an important energy storage device, are widely used in modern society, mainly including prismatic batteries and pouch batteries. Among them, prismatic batteries, due to their metal casing (such as aluminum or steel casing), have higher mechanical strength, can withstand greater mechanical loads, and have stronger resistance to impact and compression, making them particularly suitable for applications in automobiles and other scenarios with high safety requirements.

[0003] Prismatic batteries contain positive and negative electrodes and electrolyte within a metal casing. During battery cycling, some of the internal materials are lost, which significantly affects the battery's capacity and cycle performance. As the number of charge-discharge cycles increases, the battery capacity gradually decreases, cycle performance declines, and the battery's lifespan is shortened, failing to meet the requirements for long-term stable use.

[0004] Currently, existing technologies typically involve removing the battery from the device for testing and making an opening in the battery casing to allow for secondary electrolyte replenishment. However, this opening can negatively impact the battery's subsequent use, and the replenishment method is complex and cumbersome. To overcome these shortcomings, there is an urgent need to develop a novel electrolyte replenishment system. Utility Model Content

[0005] The purpose of this invention is to provide a liquid replenishment system to replenish the substances lost inside the battery in a timely manner, thereby improving the battery's cycle performance, solving the capacity decay problem, and enhancing the battery's cycle life and stability.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A fluid replenishment system includes a detection module, a heating module, and a replenishment battery. The detection module is communicatively connected to the heating module, which is installed in the replenishment battery. The detection end of the detection module is connected to the replenishment battery. The detection module is used to control the heating module to heat the replenishment battery after detecting a decrease in the capacity of the replenishment battery. A sealed bag is provided inside the replenishment battery, and the sealed bag is filled with replenishment fluid. An opening is provided on the sealed bag, and an adhesive layer is provided to close the opening. The adhesive layer opens the opening when heated.

[0008] As an optional technical solution for the replenishment system, the replenishment battery includes a housing, a battery cell and a sealing bag disposed within the housing; the sealing bag is disposed in the gap between the battery cell and the inner wall of the housing.

[0009] As an optional technical solution for the fluid replenishment system, the battery cell is a wound battery cell, which includes a straight section and an arc section. The arc section is located at both ends of the straight section, and the sealing bag is located between the arc section and the inner wall of the housing.

[0010] As an optional technical solution for the fluid replenishment system, a sealing bag is provided between the arc segment and the corner of the battery cell.

[0011] As an optional technical solution for the fluid replenishment system, at least two battery cells are provided, and a sealing bag is provided between the arc segment of two adjacent battery cells and the inner wall of the housing.

[0012] As an optional technical solution for the fluid replenishment system, the sealed bag includes a tubular bag and an adhesive layer, the replenishment fluid is disposed inside the tubular bag, the opening is disposed at both ends of the tubular bag in the length direction, and the opening connects the tubular bag to the housing.

[0013] As an optional technical solution for the electrolyte replenishment system, the tubular bag is an insulating bag resistant to electrolyte corrosion, and the thickness of the tubular bag is 0.1 mm to 0.5 mm.

[0014] As an optional technical solution for the fluid replenishment system, the adhesive layer is an acrylic adhesive layer, a heat-sensitive adhesive layer, or a hot melt adhesive layer.

[0015] As an optional technical solution for the replenishment system, the first detection terminal of the detection module is connected to the positive terminal of the replenishment battery, and the second detection terminal of the detection module is connected to the negative terminal of the replenishment battery. The detection module is configured to detect the SOH of the battery according to a preset interval, and when the SOH is lower than 80%, the detection module sends a heating signal to the heating module. The heating module is communicatively connected to the detection module and is configured to perform timed heating on the replenishment battery after receiving the heating signal.

[0016] As an optional technical solution for the fluid replenishment system, the opening on the sealed bag is disposed facing the inner wall of the housing of the fluid replenishment battery, and the heating module is disposed opposite to the opening and located on the outside of the housing.

[0017] This utility model has at least the following beneficial effects:

[0018] 1. The electrolyte replenishment system detects the capacity of the electrolyte-replenishing battery through a detection module and communicates with the heating module. It can precisely control the heating module to heat the battery based on its actual condition, achieving accurate control of the replenishment timing, ensuring replenishment effectiveness, and further extending the battery's cycle life. When battery capacity decay is detected, the heating module is promptly triggered to open the sealed bag for replenishment, automating and intelligently performing the replenishment process, ensuring timeliness and accuracy, and extending the battery's cycle life. The above operation is simple and the replenishment timing is accurate, making it suitable for various application scenarios. Furthermore, the heating module is detachable and can be installed on the electrolyte-replenishing battery, facilitating replenishment in different scenarios and enhancing the system's applicability and flexibility.

[0019] 2. This replenishing battery replenishes fluid by placing a sealed bag inside the casing and filling the bag with replenishing fluid. The openings at both ends are sealed with an adhesive layer. External heating causes the adhesive layer to fall off, the sealed bag to break, and the replenishing fluid to overflow. This process does not damage the battery body, does not affect the subsequent use of the battery, and is simple to operate.

[0020] 3. The sealing bag is placed in the gap between the cell and the casing, which can make full use of the space inside the battery and has little impact on the overall volume of the battery.

[0021] 4. The liquid replenishment unit is located inside the battery casing, making liquid replenishment simple and applicable to various application scenarios. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the fluid replenishment system provided in this embodiment of the utility model;

[0023] Figure 2 This is a cross-sectional view of the sealing bag provided in this embodiment of the utility model;

[0024] Figure 3 This is a cross-sectional view of a replenishing battery with a wound cell provided in an embodiment of the present invention;

[0025] Figure 4 This is a cross-sectional view of a replenishing battery with two wound cells provided in an embodiment of the present invention.

[0026] In the picture:

[0027] 100. Battery with added electrolyte; 110. Sealed bag; 111. Tubular bag; 112. Adhesive layer; 113. Additive electrolyte; 120. Winded cell; 121. Arc-shaped surface; 130. Casing; 140. Terminal post;

[0028] 200, Heating module; 210, First heating element; 220, Second heating element;

[0029] 300, Detection module; 400, Power supply; 500, Switch. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] like Figures 1 to 4As shown, this embodiment provides a fluid replenishment system, including a detection module 300, a heating module 200, and a replenishment battery 100. The detection module 300 is communicatively connected to the heating module 200, which is installed on the replenishment battery 100. The detection end of the detection module 300 is connected to the replenishment battery 100. The detection module 300 is used to control the heating module 200 to heat the replenishment battery 100 after detecting a decrease in the capacity of the replenishment battery 100. A sealing bag 110 is provided inside the replenishment battery 100, and the sealing bag 110 is filled with replenishment fluid 113. An opening is provided on the sealing bag 110, and an adhesive layer 112 is provided to close the opening. The adhesive layer 112 opens the opening when heated.

[0035] In this embodiment, the detection module 300 detects the battery capacity, and after the capacity decreases, the heating module 200 is controlled to heat the replenishing battery 100. The opening on the sealed bag 110 inside the replenishing battery 100 opens after being heated, allowing the replenishing liquid 113 inside the sealed bag 110 to overflow, thereby replenishing the battery. In this way, the battery can be detected and replenished without removing it from the electrical device, and the replenishment will not damage the battery casing 130. The operation is convenient and does not affect the subsequent use of the battery.

[0036] In addition, the electrolyte replenishment system provided in this embodiment can monitor battery capacity and replenish the battery in a timely manner when the battery capacity decays, thereby preventing battery performance degradation and improving battery lifespan by replenishing electrolyte in appropriate conditions.

[0037] In this embodiment, the replenishing battery 100 includes a housing 130 and a battery cell and a sealing bag 110 disposed within the housing 130. The sealing bag 110 is disposed in the gap between the battery cell and the interior of the housing 130. This arrangement avoids occupying additional space inside the housing 130, improves the space utilization rate inside the battery, and ensures the energy density of the battery.

[0038] In this embodiment, the battery cell is a wound battery cell 120. During the fabrication of the wound battery cell 120, positive and negative electrode sheets and an insulating separator are stacked crosswise, and then wound from one end to form the wound battery cell 120. The wound battery cell 120 includes a straight section and an arc section, with the arc section located at both ends of the straight section. A gap exists between the arc section of the battery cell and the interior of the housing 130. A sealing bag 110 is disposed between the arc section and the inner wall of the housing 130, which improves the space utilization within the battery.

[0039] In one embodiment of this invention, the housing 130 typically includes four side plates that enclose an accommodating space, within which the wound battery cell 120 is placed. The two sides of the straight section of the wound battery cell 120 contact two of the opposing side plates, while the arcuate section of the wound battery cell 120 contacts the other two opposing side plates. A corner is formed between adjacent side plates, leaving a gap between the corner and the arcuate section of the wound battery cell 120. A sealing bag 110 is disposed within this gap to fully utilize the internal space of the housing 130. This arrangement ensures that the sealing bag 110 is stably placed inside the replenishing battery 100, providing it with independent space and preventing it from being squeezed and broken, thus guaranteeing the integrity and reliability of the sealing bag 110.

[0040] In one embodiment of this invention, at least two battery cells are provided, and multiple battery cells are arranged along their thickness direction. A gap is formed between the arc segment of two adjacent battery cells and the inner wall of the corresponding housing 130, that is, a gap is formed between two adjacent battery cells and the corresponding side plate. The sealing bag 110 is placed in the gap, which can make full use of the internal space of the housing 130.

[0041] Furthermore, the wound battery cells 120 are provided in N rows arranged in a direction perpendicular to the vertical direction, and the sealed bags 110 are provided in (2N+2) rows, so that each arc surface 121 corresponds to a sealed bag 110, where N is a positive integer.

[0042] When the wound cell 120 is provided, the cross-sectional view of the replenishing battery 100 is as follows: Figure 3 As shown, when two winding cells 120 are provided, the cross-sectional view of the replenishing battery 100 is as follows. Figure 4 As shown. By increasing the number of cells 120 wound inside the housing 130, the space utilization rate inside the housing 130 can be improved, the volume of the cells can be increased, and thus the volumetric energy density of the replenished battery 100 can be improved.

[0043] The number of sealing bags 110 is reasonably set according to the number of wound battery cells 120, so that each arc surface 121 corresponds to one sealing bag 110, achieving uniform distribution of sealing bags 110 within the casing 130. After the replenishing liquid 113 overflows, it can more quickly and evenly wet the battery cells, effectively improving the replenishing effect of the replenishing battery 100 and the overall performance of the replenishing battery 100.

[0044] Continue to refer to Figures 1 to 4The sealed bag 110 includes a tubular bag 111 and two adhesive layers 112. The replenishing liquid 113 is filled inside the tubular bag 111. The openings are located at both ends of the tubular bag 111 along its length and connect the tubular bag 111 to the interior of the housing 130. The two adhesive layers 112 respectively seal the openings at both ends of the sealed bag 110. When the adhesive layer 112 at the opening is heated, the adhesive layer 112 detaches from the tubular bag 111, allowing the replenishing liquid 113 inside the tubular bag 111 to flow out, thus achieving replenishment.

[0045] The replenishing battery 100, by placing a sealing bag 110 inside the housing 130 and filling the sealing bag 110 with replenishing fluid 113, and sealing the openings at both ends with an adhesive layer 112, ensures the stability of the sealing bag 110 during normal use of the replenishing battery 100, and prevents the replenishing fluid 113 from accidentally leaking out during normal use of the replenishing battery 100 and affecting the performance of the replenishing battery 100, thereby improving the stability and controllability of replenishment.

[0046] In this embodiment, the housing 130 also includes a bottom plate and a top cover, which are respectively disposed at both ends of the accommodating space enclosed by the four side plates, so that the housing 130 as a whole forms a sealed space. The tubular bag 111 is disposed along the distribution direction of the bottom plate and the top cover, that is, the opening of the tubular bag 111 faces the bottom plate or the top cover. Both ends of the tubular bag 111 are provided with openings, and the replenishing liquid 113 can flow out from both ends of the tubular bag 111. With this arrangement, when the replenishing battery 100 is used on an electrical device, if the top cover and the bottom plate are distributed in a vertical direction, whether the bottom plate faces down or the top cover faces down, the replenishing liquid 113 can also flow out through the openings at both ends.

[0047] For example, the cross-section of the sealing bag 110 is not limited and can be cylindrical, rectangular, triangular, or elliptical, etc. The cross-section of the sealing bag 110 is determined by those skilled in the art based on actual engineering conditions, and the method of determination is common knowledge in the art, and will not be elaborated here.

[0048] In one embodiment of this invention, the housing 130 is further encapsulated with an electrolyte, and the battery cell is immersed in the electrolyte.

[0049] The replenishment system provided in this application can adapt to different replenishment needs by adding various replenishment solutions 113 into the sealed bag 110. The replenishment solution 113 can be a liquid of the same material as the electrolyte, or it can include some conventional replenishment materials. Exemplary and non-limiting replenishment materials include one or more of the following: high-lithium salt electrolyte, film-forming additives, dehydration and deacidification additives, and antioxidants. The replenishment solutions 113 in different sealed bags 110 can be the same or different, and multiple replenishment solutions 113 can be added to the same sealed bag 110. No further restrictions are imposed here.

[0050] When the replenishing solution 113 is the same as the electrolyte encapsulated within the casing 130, it can replenish the replenished battery 100 with the same type of electrolyte when needed. This allows the replenishing solution 113 to better integrate with the existing electrolyte after flowing out, maintaining the stability of the internal chemical environment of the replenished battery 100 and preventing abnormal internal reactions due to compositional differences. This effectively solves the problem of reduced lifespan caused by electrolyte side reactions and denaturation during charging and discharging, maintaining the stable performance of the replenished battery 100.

[0051] When the replenishing solution 113 includes a high-lithium salt electrolyte, the lithium salt concentration of the high-lithium salt electrolyte is greater than 3 mol / L. This replenishes the lithium ions irreversibly consumed on the negative electrode surface during cycling of the replenishing battery 100, solving the problem of insufficient lithium ions caused by the formation of an interface film on the negative electrode surface during cycling. Especially for battery types such as silicon-based negative electrode batteries that consume large amounts of lithium ions during cycling, silicon particles expand during charge-discharge cycles, causing lithium ion deintercalation. The deintercalated lithium ions need to form a new interface film, continuously consuming lithium ions in the electrolyte. Therefore, as the number of battery cycles increases, insufficient lithium ions in the electrolyte may lead to a sudden drop in cycle life, i.e., cycle failure. The replenishment of the high-lithium salt electrolyte effectively avoids cycle failure caused by lithium ion consumption, ensuring the cycle performance and capacity stability of the replenishing battery 100, and improving its cycle performance.

[0052] When the supplemental solution 113 includes a film-forming additive, it can continuously repair the SEI film during later cycles. The film-forming additive can be any commonly used additive in the prior art, such as vitamin C additives, etc., which will not be elaborated on here.

[0053] When the supplemental electrolyte 113 includes dehydrating and deacidifying additives, it can avoid the side effects of HF (hydrogen fluoride) on battery performance. The consumption of electrolyte produces HF, a harmful substance. As the electrolyte is consumed, the amount of HF increases, which can further accelerate lithium-ion consumption. Therefore, by adding dehydrating and deacidifying additives, the side effects of HF on battery performance can be avoided.

[0054] When the supplemental solution 113 includes antioxidants, battery stability can be further improved. For some batteries with lithium supplementation agents (Li2O, Li2O2, Li2C2O4, Li2C4O4, Li5FeO4, Li6CoO4, or Li2NiO2, etc.) added to the positive electrode, a large number of oxygen free radicals are formed during the first charge or during subsequent cycles. These oxygen free radicals can cause the binder to oxidize, leading to electrode delamination and ultimately rapid deterioration of battery performance. By supplementing the battery with antioxidants a second time in the supplemental solution 113, oxygen free radicals in the electrolyte over a larger spatial range and a longer time range can be captured, blocking the reaction between oxygen free radicals and the electrolyte or binder, thereby improving battery stability.

[0055] In this embodiment, the adhesive layer 112 is applied to the inner wall of the sealing bag 110 by coating or bonding, so that the inner wall of the port of the sealing bag 110 is sealed together. The sealing bag 110 has a simple structure and is easy to prepare.

[0056] In this embodiment, the adhesive layer 112 is an acrylic adhesive layer, a heat-sensitive adhesive layer, or a hot melt adhesive layer.

[0057] Specifically, the replenishment temperature is 80°C to 100°C. Heating the replenishment battery 100 to the replenishment temperature for a short time can open the adhesive layer 112. Moreover, the replenishment temperature is within the heat resistance range of the replenishment battery 100 and will not affect the performance of the replenishment battery 100.

[0058] The adhesive layer 112 is made of acrylic adhesive, heat-sensitive adhesive, or hot melt adhesive. These materials can deform or melt and lose their adhesiveness when heated, ensuring that the adhesive layer 112 can reliably detach from the tubular bag 111 when the two ends of the sealed bag 110 reach the replenishment temperature, allowing the opening to open and the replenishment liquid 113 to flow out smoothly. Moreover, by selecting appropriate materials, the replenishment temperature can be precisely controlled to ensure that the sealed bag 110 can be opened in time for replenishment when the capacity of the replenishment battery 100 decreases, ensuring the effectiveness and reliability of replenishment, while also ensuring the sealing performance of the sealed bag 110 under the normal operating temperature of the replenishment battery 100.

[0059] In this embodiment, the tubular bag 111 is an insulating bag resistant to electrolyte corrosion, and the thickness of the tubular bag 111 is 0.1 mm to 0.5 mm.

[0060] The tubular bag 111 is made of an insulating material resistant to electrolyte corrosion, which prevents the electrolyte from corroding the sealed bag 110, ensuring the chemical stability of the tubular bag 111 inside the replenishment battery 100, and guaranteeing the service life and integrity of the sealed bag 110 under normal conditions. Its thickness is set between 0.1 mm and 0.5 mm, which avoids the problem of being too thin and easily breaking, making it impossible to control the timing of replenishment, while also preventing it from being too thick and occupying too much internal space of the replenishment battery 100, thus improving the space utilization rate inside the replenishment battery 100.

[0061] Specifically, the insulating material resistant to electrolyte corrosion can be PET, PP, PI, or PE, etc. These materials have high high-temperature resistance, and their overall structure is not easily deformed when the sealed bag 110 is heated. If the tubular bag 111 deforms and shrinks due to heat, it cannot maintain a fixed position within the housing 130 and will move around inside the housing 130, thus affecting the charge-discharge performance and cycle performance of the replenishing battery 100.

[0062] In the fluid replenishment system provided in this embodiment, the detection module 300 includes a first detection terminal and a second detection terminal. The first detection terminal is connected to the positive terminal of the fluid replenishment battery 100, and the second detection terminal is connected to the negative terminal of the fluid replenishment battery 100. The detection module 300 is configured to detect the SOH (State of Health) of the battery at preset intervals, and when the SOH is below 80%, the detection module 300 sends a heating signal to the heating module 200. The heating module 200 is communicatively connected to the detection module 300 and is configured to perform timed heating on the fluid replenishment battery 100 after receiving the heating signal.

[0063] Specifically, the preset time is a pre-set interval, which can be manually set based on the power consumption of the electrical equipment. The preset time can be fixed or adjusted according to power consumption; no further restrictions are imposed here. State of Health (SOH) is an indicator of the battery's remaining lifespan, primarily reflecting the battery's health status and degree of degradation. By detecting the battery's SOH at preset intervals, battery capacity can be monitored.

[0064] Considering that adding liquid to the casing 130 before the replenishing battery 100 has degraded would result in excessive material in the replenishing liquid 113 within the casing 130, thus affecting the performance of the replenishing battery 100, the detection module 300 detects the capacity of the replenishing battery 100 and communicates with the heating module 200. This allows for precise control of the heating module 200 to heat the replenishing battery 100 based on its actual condition, achieving accurate control of the replenishment timing, ensuring replenishment effectiveness, and further extending the cycle life of the replenishing battery 100. When capacity degrade of the replenishing battery 100 is detected, the heating module 200 is promptly triggered to open the sealed bag 110 for replenishment, achieving automation and intelligence in the replenishment process, ensuring timeliness and accuracy, and extending the cycle life of the replenishing battery 100. The above operation is simple and the replenishment timing is accurate, making it applicable to various application scenarios. Furthermore, the heating module 200 is detachable and can be installed on the replenishing battery 100, facilitating replenishment operations in different scenarios and enhancing the system's applicability and flexibility.

[0065] Upon receiving a heating command, the heating module 200 heats the replenishing battery 100 to the replenishing temperature, achieving timed heating of the replenishing battery 100. Specifically, the detection module 300 is configured to start timing after sending a heating signal to the heating module 200, and after a preset timing period, send a stop signal to the heating module 200. The heating module 200 is configured to stop heating upon receiving the stop signal. The preset timing period is 3 to 5 minutes. Within the aforementioned temperature and time range, the adhesive layer 112 of the sealing bag 110 loses its stickiness, allowing the sealing bag 110 to open and the replenishing liquid 113 to flow out, without affecting the replenishing battery 100 itself. Furthermore, the heating module 200 can also heat the replenishing battery 100 in low-temperature environments to ensure the low-temperature performance of the replenishing battery 100.

[0066] In this embodiment, the opening on the sealing bag 110 faces the inner wall of the liquid replenishment housing 130, and the heating module 200 is positioned opposite the opening and outside the housing 130. The heating module 200 can be directly aligned with the opening, allowing it to directly heat the portion of the housing 130 corresponding to the opening when heating is required. This reduces the heat conduction distance, improves heating efficiency, and allows the adhesive layer 112 to detach quickly from the opening. Furthermore, it minimizes the impact of heating on other parts of the liquid replenishment battery 100.

[0067] Specifically, the replenishing battery 100 also includes two terminals 140, which represent the positive and negative terminals of the battery, respectively. The terminals 140 extend out of the top of the housing 130. The heating module 200 includes a first heating element 210 and two second heating elements 220. The first heating element 210 covers the bottom surface of the housing 130, and the second heating elements 220 are located on the top surface of the housing 130. Each second heating element 220 corresponds to one terminal 140, and the second heating element 220 is located on the side of the corresponding terminal 140 away from the other terminal 140.

[0068] The first heating element 210 of the heating module 200 covers the bottom surface of the housing 130, and two second heating elements 220 are located on the top surface of the housing 130 and correspond to the terminals 140. This layout can effectively and precisely heat the adhesive layers 112 at both ends of the sealed bag 110, ensuring that both ends of the sealed bag 110 can be reliably opened, allowing the replenishing liquid 113 to flow out smoothly, thus improving heating efficiency and replenishment effect. At the same time, the first heating element 210 and the second heating element 220 can be detached and installed by means of adhesion, facilitating maintenance and replacement, and improving the system's flexibility and practicality. Moreover, the above layout takes into account the structural characteristics of the replenishing battery 100 and makes reasonable use of the space within the replenishing battery 100.

[0069] The first heating element 210, the second heating element 220, the power supply 400, and the switch 500 form a circuit. The power supply 400 provides electrical energy to the first heating element 210 and the second heating element 220. The switch 500 is controlled by the detection module 300, and the control circuit is closed.

[0070] The first heating element 210 and the second heating element 220 can be heating plates or heating plates to heat the replenishing battery 100. The power supply 400 can be the replenishing battery 100 itself or an external low-voltage power supply 400. The switching element 500 can be a relay or a MOSFET. When the switching element 500 is a MOSFET, its drain and source are connected between the power supply 400 and the first heating element 210 and the second heating element 220, and its gate is connected to the detection module 300, and is controlled by the detection module 300 to realize the opening and closing of the circuit.

[0071] In other embodiments of this example, the number and specific placement of the first heating element 210 and the second heating element 220 differ. The specific placement method is a conventional technical means in the art and is well mastered by those skilled in the art, so it will not be described in detail here.

[0072] Furthermore, the replenishing battery 100 and replenishing system provided in this application can be applied to various application scenarios, specifically to energy storage devices or electrical devices, including battery management systems and thermal management systems capable of detecting battery health. This embodiment takes a power battery pack used in automobiles as an example. The replenishing battery 100 constitutes the main body of the battery pack; the detection module 300 is the battery management system within the power battery pack, which can determine the battery's health and lifespan through data from the battery management system; the heating module 200 is the thermal management module within the power battery pack, located on the bottom and top surfaces of the replenishing battery 100, capable of heating these surfaces. The battery management system and the thermal management module are connected, allowing for quick and easy replenishment without disassembling the main body of the battery pack, simply by briefly heating the main body.

[0073] Obviously, 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 neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A fluid replacement system, characterized by, The device includes a detection module (300), a heating module (200), and a replenishing battery (100). The detection module (300) is communicatively connected to the heating module (200), and the heating module (200) is installed on the replenishing battery (100). The detection end of the detection module (300) is connected to the replenishing battery (100). The detection module (300) is used to control the heating module (200) to heat the replenishing battery (100) after detecting a decrease in the capacity of the replenishing battery (100). A sealing bag (110) is provided inside the replenishing battery (100), and the sealing bag (110) is filled with replenishing fluid (113). An opening is provided on the sealing bag (110), and an adhesive layer (112) is provided to close the opening. The adhesive layer (112) opens the opening when heated.

2. The fluid replenishment system according to claim 1, characterized in that, The replenishing battery (100) includes a housing (130), a battery cell disposed within the housing (130), and a sealing bag (110); the sealing bag (110) is disposed in the gap between the battery cell and the inner wall of the housing (130).

3. The fluid replenishment system according to claim 2, characterized in that, The battery cell is a wound battery cell (120), which includes a straight section and an arc section. The arc section is located at both ends of the straight section, and the sealing bag (110) is located between the arc section and the inner wall of the housing (130).

4. The fluid replenishment system according to claim 3, characterized in that, The sealing bag (110) is provided between the arc segment and the corner of the battery cell.

5. The fluid replacement system according to claim 3, characterized in that, At least two battery cells are provided, and a sealing bag (110) is provided between the arc segment of two adjacent battery cells and the inner wall of the housing (130).

6. The fluid replenishment system according to claim 3, characterized in that, The sealed bag (110) includes a tubular bag (111) and an adhesive layer (112). The replenishing liquid (113) is disposed inside the tubular bag (111). The opening is disposed at both ends of the tubular bag (111) in the length direction. The opening connects the tubular bag (111) to the housing (130).

7. The fluid replenishment system according to claim 6, characterized in that, The tubular bag (111) is an insulating bag resistant to electrolyte corrosion, and the thickness of the tubular bag (111) is 0.1 mm to 0.5 mm.

8. The fluid replacement system according to claim 1, characterized in that, The adhesive layer (112) is an acrylic adhesive layer, a heat-sensitive adhesive layer, or a hot melt adhesive layer.

9. The fluid replacement system according to any one of claims 1-8, characterized in that, The first detection terminal of the detection module (300) is connected to the positive terminal of the replenishing battery (100), and the second detection terminal of the detection module (300) is connected to the negative terminal of the replenishing battery (100). The detection module (300) is configured to detect the SOH of the battery according to a preset interval time, and when the SOH is lower than 80%, the detection module (300) sends a heating signal to the heating module (200). The heating module (200) is communicatively connected to the detection module (300) and is configured to perform timed heating on the replenishment battery (100) after receiving the heating signal.

10. The fluid replenishment system according to any one of claims 2-7, characterized in that, The opening on the sealed bag (110) is disposed facing the inner wall of the housing (130) of the replenishing battery (100), and the heating module (200) is disposed opposite to the opening and located outside the housing (130).

Images