A high-power discharge lithium-carbon fluoride battery system

Abstract

A high-power discharge lithium fluoride battery system includes a zinc-silver battery pack formed by n zinc-silver battery cells connected in series, and a lithium fluoride battery pack formed by n-1 lithium fluoride battery cells connected in series, where n is an integer and n≥2; two adjacent zinc-silver battery cells are connected to one lithium fluoride battery cell; the positive terminal of the zinc-silver battery pack is connected to the positive output terminal of an electrical connector via a contactor; the negative terminal of the zinc-silver battery pack is connected to the negative output terminal of the electrical connector via a diode; the positive terminal of the lithium fluoride battery pack is simultaneously connected to the active terminal of the contactor and the positive output terminal of the connector via a control switch; the negative terminal of the lithium fluoride battery pack is simultaneously connected to the active terminal of the contactor and the negative output terminal of the connector via a diode. The power system provided by this invention achieves both the goal of zinc-silver batteries operating below 0°C and the goal of high-power discharge of the lithium fluoride battery pack, while simultaneously solving the problems of lithium fluoride battery cell swelling and thermal runaway caused by heat accumulation.

Description

Technical Field

[0001] This invention relates to the field of composite power technology, and more particularly to 1. a lithium fluoride battery system for high-power discharge. Background Technology

[0002] Zinc-silver batteries have advantages such as good power characteristics and good safety, but because the electrolyte is water-based, they cannot work below 0°C. In order to meet the requirements for working below 0°C, a heating system needs to be designed, which undoubtedly increases the weight of the battery and wastes resources.

[0003] Lithium-fluorinated carbon batteries have a high specific energy, reaching 2180Wh / kg, making them the system with the highest theoretical specific energy among current lithium primary batteries. They also have a high operating voltage, stable above 2.5V, which facilitates series connection during use. Furthermore, the chemical and physical properties of fluorinated carbon cathode materials are stable, resulting in long storage life and good high-temperature performance. They have become a research hotspot in primary batteries and are receiving increasing attention. However, lithium-fluorinated carbon batteries have problems such as poor high-power discharge performance and cell swelling leading to battery pack deformation.

[0004] Therefore, the application of the above two types of batteries is limited and cannot meet the requirements of weapons and equipment for high-performance power supplies. Summary of the Invention

[0005] The main objective of this invention is to propose a high-power discharge lithium fluoride battery system that can solve the problem that zinc-silver batteries cannot work below 0°C, as well as the problems of lithium fluoride batteries such as swelling, poor high-power performance, and thermal runaway caused by heat accumulation.

[0006] To achieve the above objectives, this invention proposes a high-power discharge lithium fluoride battery system, comprising a zinc-silver battery pack formed by n zinc-silver battery cells connected in series, and a lithium fluoride battery pack formed by n-1 lithium fluoride battery cells connected in series, where n is an integer and n≥2; two adjacent zinc-silver battery cells are connected to one lithium fluoride battery cell; the total positive terminal of the zinc-silver battery pack is connected to the positive output terminal of an electrical connector through a contactor output terminal; the total negative terminal of the zinc-silver battery pack is connected to the negative output terminal of the electrical connector through a diode; the total positive terminal of the lithium fluoride battery pack is connected to the active terminal of the contactor and the positive output terminal of the connector through a control switch; the total negative terminal of the lithium fluoride battery pack is connected to the active terminal of the contactor and the positive output terminal of the connector through a diode.

[0007] Preferably, the working voltage of the zinc-silver battery pack is (2.4n~4n)V, where n is an integer and n≥2.

[0008] Preferably, the operating voltage of the lithium fluoride carbon battery pack is [2(n-1)~4(n-1)]V, where n is an integer and n≥2.

[0009] Preferably, a diode is connected between the negative terminal of the zinc-silver battery pack and the connector. The diode is used to isolate the zinc-silver battery and the lithium fluoride battery, preventing them from charging each other.

[0010] Preferably, the combined power supply of zinc-silver battery and lithium fluoride battery also includes a housing, wherein the zinc-silver battery pack and the lithium fluoride battery pack are mounted on the bottom wall of the inner cavity of the housing, and the contactor, control switch and electrical connector are mounted on the side wall of the inner cavity of the housing.

[0011] Preferably, the thickness of the zinc-silver battery cell is ≥10mm. When the lithium fluoride battery cell is placed between two zinc-silver battery cells, ensuring the zinc-silver battery cell thickness is ≥10mm, the lithium fluoride battery cell can be effectively secured, preventing it from bulging.

[0012] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0013] (1) In this invention, the system is mainly powered by zinc-silver batteries during high-power discharge, providing high-power discharge with a duration of not less than 10 minutes. During steady-state low-power discharge, the system is powered by lithium fluoride-carbon battery packs. At the same time, the heat generated by the lithium fluoride-carbon battery packs is used to heat the zinc-silver batteries, keeping the zinc-silver batteries in an environment above 0°C. The combined power supply achieves both the goal of zinc-silver batteries operating below 0°C and the goal of high-power discharge of lithium fluoride-carbon battery packs, while also solving the problem of thermal runaway caused by the swelling of individual lithium fluoride-carbon battery cells and heat accumulation.

[0014] (2) In this invention, two adjacent zinc-silver battery cells are provided with a lithium fluoride battery cell. The lithium fluoride battery slowly transfers the heat generated to the zinc-silver battery, which saves the weight and cost required for heating the zinc-silver battery, improves the low-temperature environment adaptability of the zinc-silver battery, and removes the heat generated by the lithium fluoride battery, thus solving the problem of thermal runaway caused by heat accumulation in the lithium fluoride battery pack.

[0015] (3) In this invention, a contactor is designed at the output end of the zinc-silver battery pack, and a control switch is set between the output ends of the lithium fluoride battery pack. When there is no high-power discharge, the contactor is in the open state, and the zinc-silver battery does not supply power to the outside. When there is a high-power output requirement, the control switch is opened, the contactor is closed, and the zinc-silver battery outputs high power to the outside. After the high-power output ends, the control switch is disconnected, and the external output line of the zinc-silver battery is cut off. This cycle repeats n times.

[0016] (4) The present invention provides a high-power discharge lithium fluoride carbon battery system that expands the working temperature of zinc-silver batteries to -40℃, improves the high-power output capability of lithium fluoride carbon battery packs, and solves the problem of thermal runaway caused by the swelling of lithium fluoride carbon battery cells and heat accumulation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a high-power discharge lithium fluoride battery system provided by the present invention.

[0019] Figure 2 A circuit diagram of a high-power discharge lithium fluoride battery system provided by the present invention.

[0020] Explanation of reference numerals: 1. Zinc-silver battery cell; 2. Lithium-fluorinated carbon battery cell; 3. Diode; 4. Contactor; 5. Electrical connector; 6. Housing; 7. Control switch; 8. Positive terminal of zinc-silver battery pack; 9. Negative terminal of zinc-silver battery pack; 10. Positive terminal of lithium-fluorinated carbon battery pack; 11. Negative terminal of fluorinated carbon battery pack. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention 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 the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention 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 indication will also change accordingly.

[0023] As shown in the attached figures, a high-power discharge lithium fluoride battery system includes a zinc-silver battery pack formed by n zinc-silver battery cells 1 connected in series, and a lithium fluoride battery pack formed by n-1 lithium fluoride battery cells 2 connected in series, where n is an integer and n≥2; two adjacent zinc-silver battery cells 1 are connected to one lithium fluoride battery cell 2; the total positive terminal 8 of the zinc-silver battery pack is connected to the output positive terminal of the electrical connector 5 through a contactor 4; the total negative terminal 9 of the zinc-silver battery pack is connected to the output negative terminal of the electrical connector 5 through a diode 3; the total positive terminal 10 of the lithium fluoride battery pack is connected to the activation terminal of the contactor 4 and the output positive terminal of the connector 5 through a control switch 7; the total negative terminal 11 of the lithium fluoride battery pack is connected to the activation terminal of the contactor 4 and the output negative terminal of the connector 5.

[0024] In this embodiment, the zinc-silver battery pack operates at a voltage of (2.4n~4n) V, where n is an integer and n≥2. The lithium fluoride battery pack operates at a voltage of [2(n-1)~4(n-1)] V, where n is an integer and n≥2. The combined power supply operates at a voltage of [2(n-1)~4(n-1)] V, where n is an integer and n≥2.

[0025] In this embodiment, a diode 3 is connected between the negative terminal 9 of the zinc-silver battery pack and the connector 5. Diode 3 is used to isolate the zinc-silver battery and the lithium fluoride battery, preventing them from charging each other.

[0026] The lithium fluoride battery system also includes a housing 6, the zinc-silver battery pack and the lithium fluoride battery pack are mounted on the bottom wall of the inner cavity of the housing 6, and the contactor 4, control switch 7 and electrical connector 5 are mounted on the side wall of the inner cavity of the housing 6.

[0027] In this embodiment, the thickness of the zinc-silver battery cell 1 is ≥10mm. The lithium fluoride battery cell 2 is placed between two zinc-silver battery cells 1. When the thickness of the zinc-silver battery cell 1 is ≥10mm, the lithium fluoride battery cell 2 can be effectively secured and the swelling of the lithium fluoride battery cell 2 can be suppressed.

[0028] The principle of the high-power discharge lithium fluoride battery system provided by this invention is as follows:

[0029] This invention integrates a zinc-silver battery pack and a lithium fluoride battery pack, using diode 3 for isolation. The lithium fluoride battery can activate contactor 4 to provide high-power power to the zinc-silver battery, or provide steady-state low-power power for extended periods. It can also use the heat generated to heat the zinc-silver battery, improving its environmental adaptability. Furthermore, the zinc-silver battery can provide high-power power for a steady-state duration of at least 10 minutes, and can also absorb the heat generated by the lithium fluoride battery pack, reducing its temperature and preventing thermal runaway caused by heat accumulation. Diode 3 is used to isolate the zinc-silver battery and the lithium fluoride battery pack to prevent them from charging each other. Contactor 4 is used to signal the lithium fluoride battery pack to connect the discharge circuit to the zinc-silver battery. Once the control switch 7 is turned on, the contactor 4 is energized, and the zinc-silver battery can discharge to the outside at high power. When high power output is not needed, the control switch between the contactor and the lithium fluoride battery pack can be turned off. When high power output is needed, the control switch can be closed to activate the contactor, and the zinc-silver battery can supply power to the outside at high power.

[0030] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A high-power discharge lithium fluoride battery system, characterized in that, The battery pack consists of n zinc-silver battery cells (1) connected in series and n-1 lithium fluoride battery cells (2) connected in series, where n is an integer and n≥2; a lithium fluoride battery cell (2) is provided between two adjacent zinc-silver battery cells (1). The positive terminal (8) of the zinc-silver battery pack is connected to the positive output terminal of the electrical connector (5) through the output terminal of the contactor (4); the negative terminal (9) of the zinc-silver battery pack is connected to the negative output terminal of the electrical connector (5) through the diode (3); The positive terminal (10) of the lithium fluorine carbon battery pack is connected to the active terminal of the contactor (4) and the positive terminal of the connector through the control switch (7); the negative terminal (11) of the lithium fluorine carbon battery pack is connected to the active terminal of the contactor (4) and the negative terminal of the electrical connector (5) through the diode (3).

2. The lithium fluoride-carbon battery system for high-power discharge as described in claim 1, characterized in that, The zinc-silver battery pack operates at a voltage of 2.4nV to 4nV, where n is an integer and n≥2.

3. The high-power discharge lithium fluoride battery system as described in claim 1, characterized in that, The operating voltage of the lithium fluoride carbon battery pack is 2(n-1)V to 4(n-1)V, where n is an integer and n≥2.

4. A high-power discharge lithium fluoride battery system as described in claim 1, characterized in that, A diode (3) is connected between the negative terminal (9) of the zinc-silver battery pack and the connector (5).

5. A high-power discharge lithium fluoride battery system as described in claim 1, characterized in that, It also includes a housing (6), the zinc-silver battery pack and the lithium fluoride battery pack are mounted on the bottom wall of the inner cavity of the housing (6), and the contactor (4), the control switch (7) and the electrical connector (5) are mounted on the side wall of the inner cavity of the housing (6).

6. A high-power discharge lithium fluoride battery system as described in claim 1, characterized in that, The thickness of the zinc-silver battery cell (1) is ≥10mm.

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