Two-path independent output thermal battery with heat distribution balance capability

Abstract

The invention provides a two-path independent output thermal battery with heat distribution balance capability. The two-path independent output thermal battery comprises a first electric pile unit, a second electric pile unit, an insulating heat-insulating layer and a battery cover, a first positive output binding post, a first negative output binding post, a second positive output binding post and a second negative output binding post are arranged on the battery cover; the positive and negative electrodes of the first electric pile unit are correspondingly connected with the first positive output binding post and the first negative output binding post, the positive and negative electrodes of the second electric pile unit are correspondingly connected with the second positive output binding post and the second negative output binding post, and an insulating layer is arranged between the first electric pile unit and the second electric pile unit. The thermal battery has the beneficial effects that gradient heat distribution is realized by arranging the insulating layer and controlling the difference of heat distribution coefficients, so that the risk of local overheating is reduced, and the overall heat management performance of the thermal battery is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal batteries, and in particular relates to a two-way independent output thermal battery with heat distribution balance capability. Background Art

[0002] A thermal battery is a device that generates electricity through chemical reactions. It is usually used in situations where long-term stable power supply is required. It is a heat-activated reserve battery that enters the working state by heating and melting the non-conductive solid salt electrolyte into an ionic conductor through the battery's own heating system. A thermal battery with two independent outputs is a special thermal battery design. It has two independent power output paths, each of which can provide power independently. The electrolyte type is adjusted according to the current density of the two paths. Different electrolytes require different amounts of heat, and the heat distribution of the two battery stacks may be inconsistent. The thermal batteries currently on the market will generate a lot of heat during long-term operation, and heat imbalance may occur, leading to battery leakage.

[0003] Therefore, it is necessary to design a two-way independent output thermal battery that can achieve gradient heat distribution and avoid the thermal risks caused by the large heat difference in the battery stack inside the battery. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a two-way independent output thermal battery with heat distribution balance capability, which is particularly suitable for solving the two-way independent output thermal battery that is prone to heat imbalance.

[0005] The technical solution adopted by the present invention is: to provide a two-way independent output thermal battery with heat distribution balance capability, comprising: a first battery stack unit, a second battery stack unit, an insulating heat insulation layer and a battery cover;

[0006] The battery cover is provided with a first positive output terminal, a first negative output terminal, a second positive output terminal and a second negative output terminal;

[0007] The positive and negative electrodes of the first battery stack unit are connected to the first positive output terminal and the first negative output terminal respectively, and the positive and negative electrodes of the second battery stack unit are connected to the second positive output terminal and the second negative output terminal respectively. An insulating layer is arranged between the first battery stack unit and the second battery stack unit.

[0008] Further, the first battery stack unit includes: an upper battery stack, a lower battery stack, a first drain bar, a second drain bar, a third drain bar, a first positive electrode current collecting sheet, a first negative electrode current collecting sheet, a second positive electrode current collecting sheet, and a second negative electrode current collecting sheet;

[0009] The positive electrode of the lower battery stack is connected to the first positive current collector, one end of the first drain bar is connected to the first positive current collector, and the other end is connected to the first positive output terminal, the negative electrode of the lower battery stack is connected to the first negative current collector, one end of the second drain bar is connected to the first negative current collector, and the other end is connected to the second positive current collector, the second positive current collector is connected to the positive electrode of the upper battery stack, the negative electrode of the upper battery stack is connected to the second negative current collector, one end of the third drain bar is connected to the second negative current collector, and the other end is connected to the first negative output terminal.

[0010] Furthermore, the second battery stack unit is arranged between the upper battery stack and the lower battery stack, separated by an insulating and heat-insulating layer.

[0011] Further, the second battery stack unit includes: a second battery stack, a fourth drain bar, a fifth drain bar, a third positive electrode current collecting sheet and a third negative electrode current collecting sheet;

[0012] The positive electrode of the second battery stack is connected to the third positive current collector, one end of the fourth lead bar is connected to the third positive current collector, and the other end is connected to the second positive output terminal, the negative electrode of the second battery stack is connected to the third negative current collector, one end of the fifth lead bar is connected to the third negative current collector, and the other end is connected to the second negative output terminal.

[0013] Furthermore, the difference in heat distribution coefficient between the first stack unit and the second stack unit is greater than 0.05.

[0014] The advantages and positive effects of the present invention are as follows: due to the adoption of the above technical solution, thanks to the design of two independent outputs, even if one of the output paths has a problem, the other can continue to supply power, and allows flexible distribution of power according to different load requirements, thereby improving the flexibility, redundancy and reliability of the system; by setting an insulating heat insulation layer and controlling the difference in heat distribution coefficients, gradient heat distribution is achieved, which helps to reduce the risk of local overheating and improve the overall thermal management performance of the thermal battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of a thermal battery according to an embodiment of the present invention DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0017] like Figure 1 As shown, the present invention provides a two-way independent output thermal battery with heat distribution balance capability, comprising: a first battery stack unit 100, a second battery stack unit 200, an insulating heat insulation layer 300 and a battery cover 400;

[0018] The battery cover 400 is provided with a first positive output terminal 401, a first negative output terminal 402, a second positive output terminal 403 and a second negative output terminal 404;

[0019] The positive and negative electrodes of the first battery stack unit 100 are connected to the first positive output terminal 401 and the first negative output terminal 402 respectively, and the positive and negative electrodes of the second battery stack unit 200 are connected to the second positive output terminal 403 and the second negative output terminal 404 respectively. An insulating layer 300 is arranged between the first battery stack unit 100 and the second battery stack unit 200.

[0020] Preferably, the insulating layer 300 is made of asbestos or ceramic fiber.

[0021] Thanks to the design of two independent outputs, even if there is a problem in one of the output paths, the other can continue to supply power, and allows flexible distribution of power according to different load requirements, improving the flexibility, redundancy and reliability of the system.

[0022] In one embodiment, the first battery stack unit 100 includes: an upper battery stack 101, a lower battery stack 102, a first drain bar 103, a second drain bar 104, a third drain bar 105, a first positive electrode current collector 106, a first negative electrode current collector 107, a second positive electrode current collector 108 and a second negative electrode current collector 109;

[0023] The positive electrode of the lower stack 102 is connected to the first positive electrode current collector 106, one end of the first drain bar 103 is connected to the first positive electrode current collector 106, and the other end is connected to the first positive output terminal 401, the negative electrode of the lower stack 102 is connected to the first negative electrode current collector 107, one end of the second drain bar 104 is connected to the first negative electrode current collector 107, and the other end is connected to the second positive electrode current collector 108, the second positive electrode current collector 108 is connected to the positive electrode of the upper stack 101, the negative electrode of the upper stack 101 is connected to the second negative electrode current collector 109, one end of the third drain bar 105 is connected to the second negative electrode current collector 109, and the other end is connected to the first negative output terminal 402. The materials used for the first drain bar 103, the second drain bar 104 and the third drain bar 105 include but are not limited to nickel, copper and stainless steel.

[0024] Preferably, the positive electrode material of the upper battery stack 101 and the lower battery stack 102 is sulfide, the negative electrode material of the upper battery stack 101 and the lower battery stack 102 is Li-based metal, the electrolyte material in the upper battery stack 101 and the lower battery stack 102 is Li-based multi-electrolyte, and the upper battery stack 101 and the lower battery stack 102 include iron powder heating plates.

[0025] Preferably, the material used for the first drain bar 103 , the second drain bar 104 and the third drain bar 105 is copper.

[0026] In one embodiment, the second battery stack unit 200 is disposed between the upper battery stack 101 and the lower battery stack 102 , separated by an insulating layer 300 .

[0027] By providing the insulating heat-insulating layer 300 and controlling the difference in heat distribution coefficients, gradient heat distribution is achieved, which helps to reduce the risk of local overheating and improve the overall thermal management performance of the thermal battery.

[0028] In one embodiment, the second battery stack unit 200 includes: a second battery stack 201, a fourth drain bar 202, a fifth drain bar 203, a third positive electrode current collecting sheet 204 and a third negative electrode current collecting sheet 205;

[0029] The positive electrode of the second battery stack 201 is connected to the third positive current collector 204, one end of the fourth drain bar 202 is connected to the third positive current collector 204, and the other end is connected to the second positive output terminal 403, the negative electrode of the second battery stack 201 is connected to the third negative current collector 205, one end of the fifth drain bar 203 is connected to the third negative current collector 205, and the other end is connected to the second negative output terminal 404.

[0030] Preferably, the positive electrode material of the second battery stack 201 is sulfide, the negative electrode material of the second battery stack 201 is Li-based metal, the electrolyte material in the second battery stack 201 is Li-based multi-electrolyte, and the second battery stack 201 includes an iron powder heating plate.

[0031] In one embodiment, the difference in heat distribution coefficient between the first stack unit 100 and the second stack unit 200 is greater than 0.05.

[0032] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A two-way independent output thermal battery with heat distribution balance capability, characterized in that: include: A first battery stack unit, a second battery stack unit, an insulating heat insulation layer and a battery cover; The battery cover is provided with a first positive output terminal, a first negative output terminal, a second positive output terminal and a second negative output terminal; The positive and negative electrodes of the first battery stack unit are connected to the first positive output terminal and the first negative output terminal respectively, and the positive and negative electrodes of the second battery stack unit are connected to the second positive output terminal and the second negative output terminal respectively. An insulating layer is arranged between the first battery stack unit and the second battery stack unit.

2. The two-way independent output thermal battery with heat distribution balance capability according to claim 1 is characterized in that: The first battery stack unit includes: an upper battery stack, a lower battery stack, a first drain bar, a second drain bar, a third drain bar, a first positive electrode current collecting sheet, a first negative electrode current collecting sheet, a second positive electrode current collecting sheet, and a second negative electrode current collecting sheet; The positive electrode of the lower battery stack is connected to the first positive current collector, one end of the first drain bar is connected to the first positive current collector, and the other end is connected to the first positive output terminal, the negative electrode of the lower battery stack is connected to the first negative current collector, one end of the second drain bar is connected to the first negative current collector, and the other end is connected to the second positive current collector, the second positive current collector is connected to the positive electrode of the upper battery stack, the negative electrode of the upper battery stack is connected to the second negative current collector, one end of the third drain bar is connected to the second negative current collector, and the other end is connected to the first negative output terminal.

3. The two-way independent output thermal battery with heat distribution balance capability according to claim 2 is characterized in that: The second battery stack unit is arranged between the upper battery stack and the lower battery stack, separated by an insulating and heat-insulating layer.

4. The two-way independent output thermal battery with heat distribution balance capability according to claim 1, characterized in that: The second battery stack unit includes: a second battery stack, a fourth drain bar, a fifth drain bar, a third positive electrode current collecting sheet and a third negative electrode current collecting sheet; The positive electrode of the second battery stack is connected to the third positive current collector, one end of the fourth lead bar is connected to the third positive current collector, and the other end is connected to the second positive output terminal, the negative electrode of the second battery stack is connected to the third negative current collector, one end of the fifth lead bar is connected to the third negative current collector, and the other end is connected to the second negative output terminal.

5. The two-way independent output thermal battery with heat distribution balance capability according to claim 1 is characterized in that: The difference in heat distribution coefficient between the first stack unit and the second stack unit is greater than 0.05.

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