Device for improving passivation and insufficient discharge capability of lithium thionyl chloride battery
By connecting energy storage devices in parallel at both ends of the lithium thionyl chloride battery pack components, the problem of insufficient discharge capacity caused by passivation of lithium thionyl chloride batteries in low-power devices is solved, achieving long life and high current power supply capacity of the battery pack components, and broadening the application scenarios.
Patent Information
- Application Number
- CN202421703195.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-07-18
AI Technical Summary
Lithium thionyl chloride batteries are prone to passivation in low-power devices, resulting in insufficient discharge capacity, especially voltage drop under high current demand. Furthermore, the need for periodic high load current to eliminate passivation increases unnecessary consumption and shortens battery life.
Energy storage devices are connected in parallel at both ends of the battery pack components. The energy storage devices provide a large current supply when the battery is passivated, the battery pack components are charged with a small current to store the energy, and the energy storage devices provide a large current discharge, which broadens the application scenarios and extends the battery life.
It solves the problem of insufficient discharge capacity caused by passivation in lithium thionyl chloride batteries, extends battery life, expands its application scenarios, and avoids voltage lag and unnecessary consumption caused by passivation.
Smart Images
Figure CN223462240U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the battery technical field, more specifically relates to a device for improving the passivation and insufficient discharge capacity of lithium thionyl chloride batteries. BACKGROUND
[0002] At present, low-power devices of portable products are commonly powered by batteries. Since they are portable products, the batteries used are required to be small in size and large in capacity. Lithium thionyl chloride batteries have unique advantages in this regard due to their high energy density. However, the use of lithium thionyl chloride batteries involves the problems of passivation and insufficient discharge capacity. The traditional method is to use them in low-power products by taking advantage of their own characteristics. However, this limits the use of scenarios, and devices that require large current cannot be used, such as driving a motor with a current of about 50 mA or powering a catalytic sensor.
[0003] And the following problems are caused by long-term use:
[0004] 1. Battery passivation
[0005] 2. After passivation, the discharge capacity is further reduced, and the voltage is easily pulled down during large current discharge.
[0006] 3. In order to avoid passivation, it is necessary to use large load current (such as current above 10 mA) regularly to eliminate passivation, which increases unnecessary consumption, shortens the service life of the battery and complicates the use method.
[0007] 4. Discharging lithium thionyl chloride batteries at a large current will also cause the battery to not fully release its capacity. Discharging at a current below 1 mA can discharge more than 90% of the battery capacity. SUMMARY
[0008] The purpose of the utility model is to solve the above technical problems, and the utility model provides a device for improving the passivation and insufficient discharge capacity of lithium thionyl chloride batteries.
[0009] The utility model discloses a technical scheme to realize the above purpose:
[0010] The utility model provides a device for improving the passivation and insufficient discharge capacity of lithium thionyl chloride batteries, comprising a battery pack component and an energy storage device connected in parallel with the battery pack component, the battery pack component charges the energy storage device, and the battery pack component and the energy storage device connected in parallel form a charge and discharge assembly, and the charge and discharge assembly is connected with an electrical load.
[0011] The present application is to provide a battery module and a charging and discharging assembly. The battery module is connected in parallel with an energy storage device. The energy storage device is charged by the battery module. When the load circuit needs a large current discharge (depending on the discharge capacity of the energy storage device), the energy storage device provides the large current discharge (such as 100 mA). After the battery module is passivated after a long time low current (less than 10 mA) discharge, the battery module can continue to charge the energy storage device with a small current (1 mA). The battery module can fully release its capacity when it is charged with a small current. The energy storage device provides energy for the load circuit, and the discharge capacity of the charging and discharging assembly is determined by the energy storage device, avoiding the problem of insufficient discharge current caused by passivation of the battery module. The service life of the battery module is prolonged.
[0012] In one embodiment, the battery module includes a plurality of groups of battery cells connected in parallel, and each group of battery cells includes a plurality of batteries connected in series at the head and tail.
[0013] In one embodiment, the battery module includes three groups of battery cells connected in parallel, wherein two groups of battery cells include three batteries connected in series at the head and tail, and the other group of battery cells includes two batteries connected in series at the head and tail, and each battery has a voltage of 3.6 V.
[0014] In one embodiment, the battery module includes four groups of battery cells connected in parallel, and each group of battery cells includes two lithium sub-batteries connected in series at the head and tail, and each battery has a voltage of 3.6 V.
[0015] In one embodiment, a reverse charging prevention diode is connected in parallel across each battery to prevent reverse charging of the battery module.
[0016] In one embodiment, an over-discharge prevention diode is connected in parallel across each battery to prevent over-discharge of the battery module.
[0017] 1 - battery module, 2 - reverse charging prevention diode, 3 - over-discharge prevention diode, 4 - energy storage device.
[0018] In one embodiment, the battery is a lithium sub-sulfuryl chloride battery.
[0019] Specifically, the present application widens the application scenarios of lithium sub-sulfuryl chloride batteries and avoids the impact of insufficient discharge capacity caused by passivation of the battery, and can fully release the maximum capacity of the battery.
[0020] In one embodiment, the energy storage device includes a plurality of capacitors connected in series.
[0021] In one embodiment, the energy storage device includes at least two capacitors connected in series.
[0022] In one embodiment, the capacitor provides a stable current through a continuous or pulsed discharge current.
[0023] Specifically, the energy storage device replaces the battery pack component to provide a large current to the subsequent power load. The large working current required by the power load can be determined by the continuous / pulsed discharge current capacity of the energy storage device. The battery performance is improved, and the use scenario of the battery is expanded. The voltage hysteresis is not pulled down due to the battery passivation of the battery pack component, which causes the load circuit to power off.
[0024] The capacitor has the characteristics of small self-leakage current (less than 2uA after 72 hours), large continuous / pulsed discharge current (up to more than 200mA), and large storage capacity, which meets the demand of load working current. This combination improves the problem of insufficient discharge capacity of lithium thionyl chloride batteries.
[0025] The beneficial effects of the utility model are as follows:
[0026] 1. The energy storage device is connected in parallel across the battery pack component, allowing the battery pack component to continuously charge the energy storage device, and allowing the energy storage device to store the battery pack component. When the subsequent load circuit requires a large current discharge (determined by the discharge capacity of the energy storage device), the energy storage device provides a large current discharge (such as 100mA). After the battery pack component is passivated after a long time low current (less than 10mA) discharge, the battery pack component can also continue to charge the energy storage device with a small current (1mA). The battery pack component can fully release its capacity when charging with a small current. The energy storage device provides energy to the subsequent load, and the discharge capacity of the charge and discharge assembly is determined by the energy storage device, avoiding the problem of insufficient discharge current caused by battery pack component passivation. The service life of the battery pack component is extended.
[0027] 2. The utility model discloses a reasonable design, which can solve the problem of insufficient discharge capacity of lithium thionyl chloride battery caused by long-term use of lithium thionyl chloride battery. The lithium thionyl chloride battery can continuously charge the energy storage device, and can also charge with a small current after the battery is passivated. The lithium thionyl chloride battery is characterized by discharging with a small current, such as less than 0.5mA, which can fully release its capacity. Figure 2 .
[0028] 3. The energy storage device solves the problem of small discharge current after battery passivation and eliminates the passivation problem. The battery discharges with a small current to fully release the capacity, and the subsequent load circuit can be powered by the continuous / pulsed current of the energy storage device, avoiding the disadvantage of lithium thionyl chloride that cannot discharge with a large current (more than 100mA), and optimizing the use scenario of the battery. BRIEF DESCRIPTION OF DRAWINGS
[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.
[0030] Figure 1 is a structural schematic view of the present application;
[0031] Figure 2 is Figure 1 a front view of the present application;
[0032] Reference signs: 1 - battery pack component, 2 - reverse charge prevention diode, 3 - overdischarge prevention diode, 4 - energy storage device. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.
[0034] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.
[0035] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second" and the like are only used to distinguish description, and cannot be understood as indicating or implying relative importance.
[0036] In the description of the embodiments of the present application, it should be noted that the terms "inner", "outer", "upper", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product of the present application when it is usually placed, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0037] Embodiment 1
[0038] As Figures 1 to 2 shown, the embodiment provides a device for improving the passivation and insufficient discharge capacity of lithium thionyl chloride batteries, which includes a battery assembly component 1 and an energy storage device 4 connected in parallel with the battery assembly component 1. The battery assembly component 1 charges the energy storage device 4, and the battery assembly component 1 and the energy storage device 4 connected in parallel form a charge-discharge assembly, which is connected with a power load.
[0039] The scheme allows the battery assembly component 1 to charge the energy storage device 4 at all times, so that the energy storage device 4 stores the power of the battery assembly component 1. When the load circuit behind needs large current discharge (depending on the discharge capacity of the energy storage device 4), the energy storage device 4 provides large current discharge (such as 100 mA). After the battery assembly component 1 is passivated after long-time low-current (less than 10 mA) discharge, the battery assembly component 1 can also continue to charge the energy storage device 4 with a small current (1 mA). The battery assembly component 1 can fully release its power when charging with a small current. The energy storage device 4 provides power to the load behind, and the discharge capacity of the charge-discharge assembly is determined by the energy storage device 4, avoiding the problem of insufficient discharge current caused by the passivation of the battery assembly component 1. The service life of the battery assembly component 1 is extended.
[0040] In one embodiment, the battery assembly component 1 includes a plurality of groups of battery cells connected in parallel, and each group of battery cells includes a plurality of batteries connected in series at the head and tail.
[0041] In one embodiment, the battery assembly component 1 includes three groups of battery cells connected in parallel, wherein two groups of battery cells include three batteries connected in series at the head and tail, and the other group of battery cells includes two batteries connected in series at the head and tail, and the voltage of each battery is 3.6 V.
[0042] In one embodiment, the battery assembly component 1 includes four groups of battery cells connected in parallel, and each group of battery cells includes two lithium sub-batteries connected in series at the head and tail, and the voltage of each battery is 3.6 V.
[0043] In one embodiment, a reverse charging prevention diode 2 is connected in parallel across each battery to prevent reverse charging of the battery assembly component 1.
[0044] In one embodiment, an over-discharge prevention diode 3 is connected in parallel across each battery to prevent over-discharge of the battery assembly component 1.
[0045] In one embodiment, the battery is a lithium thionyl chloride battery.
[0046] Specifically, the present solution widens the application scenarios of lithium thionyl chloride batteries and avoids the impact of insufficient discharge capacity caused by battery passivation, and can fully release its maximum power.
[0047] In one embodiment, the energy storage device 4 includes a plurality of capacitors connected in series.
[0048] In one embodiment, the energy storage device 4 includes at least two capacitors connected in series.
[0049] In one embodiment, the capacitors provide stable current through continuous or pulsed discharge current.
[0050] Specifically, the energy storage device 4 replaces the battery pack component 1 to provide large current power to the subsequent load. The large working current required by the load can be determined by the continuous / pulsed discharge current capacity of the energy storage device 4. The battery performance is improved, and the use scenarios of the battery are expanded. The voltage hysteresis is not pulled down due to the battery passivation of the battery pack component 1, which cannot discharge sufficient large current (100 mA or more), resulting in power failure of the load circuit.
[0051] The capacitor has the characteristics of small self-leakage current (less than 2uA after 72 hours), large continuous / pulsed discharge current (up to 200mA or more), and large storage capacity. This combination improves the problem of insufficient discharge capacity of lithium thionyl chloride batteries.
Claims
1. An apparatus for improving passivation and discharge capacity deficiency of lithium sulfinyl chloride batteries, comprising: a lithium sulfinyl chloride battery; and a passivation agent disposed in the lithium sulfinyl chloride battery. The application relates to a battery pack component (1) and an energy storage device (4) connected in parallel with the battery pack component (1), the battery pack component (1) charges the energy storage device (4), and the battery pack component (1) and the energy storage device (4) connected in parallel form a charging and discharging assembly, and the charging and discharging assembly is connected with a power consumption load. The battery pack component (1) comprises multiple groups of battery units connected in parallel, each group of the battery units comprises multiple batteries connected in series at the head and tail, the battery pack component (1) comprises three groups of the battery units connected in parallel, two groups of the battery units comprise three batteries connected in series at the head and tail, and the other group of the battery units comprises two batteries connected in series at the head and tail, and the voltage of each battery is 3.6 V. The energy storage device (4) comprises multiple capacitors connected in series. Anti-reverse charging diodes (2) are connected in parallel at the two ends of each battery to prevent the battery pack component (1) from being reversely charged.
2. The device for improving passivation and insufficient discharge capacity of lithium sulfinyl chloride batteries according to claim 1, characterized in that, Anti-over-discharge diodes (3) are connected in parallel at the two ends of each battery to prevent the battery pack component (1) from being over-discharged.
3. The device for improving passivation and discharge capacity deficiency of lithium sulfinyl chloride batteries according to claim 2, characterized in that, The battery is a lithium hyposulfuryl chloride battery.
4. The device for improving passivation and discharge capacity deficiency of lithium sulfinyl chloride batteries according to claim 1, characterized in that, The energy storage device (4) comprises at least two capacitors connected in series.
5. The device for improving passivation and discharge capacity deficiency of lithium sulfinyl chloride batteries according to claim 1, characterized in that, The capacitors provide stable current through continuous discharge current or pulse discharge current.