Starting power supply and thermal management method

Abstract

The invention provides a starting power supply and a heat management method, the starting power supply comprises a battery pack and a shell, the battery pack is installed in the shell, and an upper cover is installed at the top end of the shell in a sealing mode; a positive pole and a negative pole which are electrically connected with the battery pack are arranged on a cover body of the upper cover, the battery pack consists of a plurality of battery cells which are connected in series or in parallel through bus bars, a heating assembly is arranged inside the battery pack, and a refrigeration assembly which is in heat conduction connection with the positive pole and the negative pole is arranged outside the battery pack; and the periphery of the battery pack is wrapped with a heat insulating layer. The defects that a traditional starting power supply cannot dissipate heat at high temperature and is insufficient in low-temperature starting performance can be overcome.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the technical field of batteries, and particularly relates to a starting power supply and a thermal management method. BACKGROUND

[0002] As a portable energy storage device, the starting power supply is widely used in scenes such as automobile emergency starting, outdoor operation power supply, emergency rescue, and the like, and the core performance thereof depends on the large-current discharge performance of a battery pack. The large-current discharge performance of the battery pack is closely related to the environmental temperature.

[0003] The existing starting power supply is installed in an engine compartment, and the environmental temperature in the engine compartment directly affects the temperature of the battery pack. When the temperature in the engine compartment is high, the heat inside the battery pack cannot be discharged; when the temperature in the engine compartment is low, the battery pack has no heat preservation and heating measures, which seriously affects the service life and the large-current discharge performance of the battery pack. SUMMARY

[0004] The present application mainly provides a starting power supply and a thermal management method to solve the technical problems in the background.

[0005] The technical solution adopted by the present application to solve the above technical problems is as follows:

[0006] A starting power supply comprises a battery pack and a shell, the battery pack is installed in the shell, an upper cover is sealingly installed at the top end of the shell, and a positive pole and a negative pole electrically connected with the battery pack are arranged on the cover body of the upper cover;

[0007] The battery pack is composed of a plurality of battery cells connected in series or in parallel through bus bars, a heating assembly is arranged inside the battery pack, a refrigeration assembly in heat-conducting connection with the positive pole and the negative pole is arranged outside the battery pack, and an insulating layer is wrapped around the battery pack.

[0008] Further, the heating assembly comprises heating sheets, connecting sheets and heat-conducting insulating glue; the heating sheets are attached to one side of the battery pack through the heat-conducting insulating glue and the bus bars, the heat-conducting insulating glue is applied to the surfaces of the bus bars and the gaps between the bus bars, and the connecting sheets are respectively connected with the positive / negative bus bars at one end and are connected with the positive pole / negative pole at the other end.

[0009] Further, the refrigeration assembly comprises copper / aluminum terminals, capillary heat pipe groups and semiconductor refrigerators, the copper / aluminum terminals are in thermal contact with the positive pole and the negative pole, one end of the capillary heat pipe groups is in thermal contact with the copper / aluminum terminals, the other end is in thermal contact with the semiconductor refrigerators, and the capillary heat pipe groups are wrapped with heat preservation sleeves outside.

[0010] Further, the insulating layer comprises solid-solid phase change materials in an inner layer and heat preservation materials in an outer layer.

[0011] Furthermore, it also includes a protection board and a temperature probe installed inside the casing. The protection board is communicatively connected to the heating element and the thermoelectric cooler, respectively, and the temperature probe is electrically connected to the protection board and inserted into the battery pack.

[0012] Based on the above-mentioned technical solution for a startup power supply, a thermal management method for a startup power supply will also be provided, including the following steps: Step 1: The protection board collects the battery pack temperature in real time through a temperature probe; Step 2: When the battery pack temperature is lower than the first preset value, the protection board activates the heating element to heat the battery pack. Step 3: When the battery pack temperature rises to the second preset value, the protection board shuts off the heating element; Step 4: When the battery pack temperature is higher than the third preset value, the protection board activates the semiconductor cooler to cool the battery pack through the copper / aluminum terminals and capillary heat pipe assembly. Step 5: When the battery pack temperature drops to the fourth preset value, the protection board shuts down the semiconductor cooler.

[0013] Furthermore, the first preset value is -20 to 5℃, the second preset value is 0 to 15℃, the third preset value is 35 to 70℃, and the fourth preset value is 30 to 55℃.

[0014] Furthermore, in step two, when the protection board detects that the battery pack temperature has risen to a second preset value, the protection board allows the battery pack to be charged.

[0015] Furthermore, when the protection board receives a preheating command or a precooling command sent by a remote terminal, it will activate the heating element or the semiconductor cooler in advance when the battery temperature is lower than a first preset value or higher than a third preset value.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: Firstly, in low-temperature environments, the heating element of this invention rapidly heats the battery by closely adhering to the busbar with thermally conductive insulating adhesive, completely solving the problem of traditional starting power supplies being unable to charge or discharge at low temperatures, thus ensuring emergency start-up response. At high temperatures, relying on the directional heat dissipation of copper / aluminum terminals, capillary heat pipe assembly, and semiconductor cooler, heat dissipation is transmitted remotely through the capillary heat pipe assembly, avoiding local heat accumulation, improving battery cycle life, and reducing the risk of thermal runaway.

[0017] Secondly, the battery pack of the present invention is surrounded by heat-insulating material, and the inner layer of the heat-insulating material is filled with solid-solid phase change material. This can not only block external high and low temperature interference, but also buffer temperature fluctuations through heat absorption / release of the phase change material, so that the battery can be kept stable in the optimal operating temperature range in a wide temperature environment.

[0018] Third, the protection board of this invention integrates remote control function, which supports the terminal to send preheating / precooling instructions in advance, so that the equipment can be put into use in the best state without on-site operation. It is particularly suitable for high and low temperature high current pulse discharge scenarios, such as vehicle auxiliary start-up; real-time temperature monitoring, fully automatic heating, cooling, and allow-to-charge and allow-to-discharge judgment after power-on, without manual adjustment, reducing the operation threshold and the risk of misjudgment.

[0019] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is an exploded view of the power supply for the present invention; Figure 2 This is a schematic diagram of the battery pack structure of the present invention; Figure 3 This is a schematic diagram of the refrigeration component structure of the present invention; Figure 4 This is a schematic diagram of the solid-solid phase change material and thermal insulation material of the present invention.

[0021] In the diagram: 1. Battery pack; 11. Busbar; 12. Positive terminal; 13. Negative terminal; 2. Outer casing; 3. Top cover; 4. Heating assembly; 41. Heating element; 42. Connecting piece; 43. Thermally conductive insulating adhesive; 5. Cooling assembly; 51. Copper / aluminum terminal; 52. Capillary heat pipe assembly; 53. Semiconductor cooler; 54. Insulation jacket; 6. Insulation layer; 61. Solid-solid phase change material; 62. Insulation material; 7. Protection board. Detailed Implementation

[0022] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] This application provides a startup power supply, the schematic diagram of which is shown below. Figures 1-4 As shown. The power supply includes a battery pack 1 and a housing 2. The battery pack 1 is installed inside the housing 2. A top cover 3 is sealed on the top of the housing 2. The top cover 3 has a positive terminal 12 and a negative terminal 13 that are electrically connected to the battery pack 1.

[0026] The battery pack 1 is composed of multiple cells connected in series or in parallel through busbars 11. The battery pack 1 is equipped with a heating component 4 inside and a cooling component 5 that is thermally connected to the positive terminal 12 and the negative terminal 13 outside. The battery pack 1 is surrounded by a heat insulation layer 6.

[0027] It should be noted that in this embodiment, multiple battery cells are connected in series or parallel via busbar 11 to form battery pack 1. Battery pack 1 is installed inside housing 2, and the top of housing 2 is sealed with top cover 3. Heating component 4 powered by battery pack 1 and cooling component 5 thermally connected to positive and negative terminals are attached to the busbar of battery pack 1 to cope with the effects of low temperature and high temperature environments, respectively. In addition, heat insulation layer 6 is wrapped around battery pack 1 to reduce heat conduction between the external environment and battery pack 1. The combination of heating component 4, cooling component 5 and heat insulation layer 6 constructs a temperature control system for battery pack 1, initially solving the performance degradation and safety problems caused by ambient temperature fluctuations in traditional starting power supplies.

[0028] Optional, please refer to the appendix Figure 2 The heating assembly 4 includes a heating element 41, a thermally conductive insulating adhesive 43, and a busbar 11. The heating element 41 is bonded to the busbar 11 by the thermally conductive insulating adhesive 43. The thermally conductive insulating adhesive 43 is applied to the surface of the busbar 11 and the gap between the busbars 11. One end of the connecting piece 42 is connected to the positive and negative busbars 11 respectively, and the other end is connected to the positive terminal 12 and the negative terminal 13 respectively.

[0029] In this embodiment, when the temperature of the battery pack 1 is too low, the protection board 7 activates the heating element 41, which efficiently and evenly conducts heat to each cell through the busbar 11 and the thermally conductive insulating adhesive 43 to raise the temperature.

[0030] Optional, please refer to the appendix Figure 2 and 3The cooling component 5 includes a copper / aluminum terminal 51, a capillary heat pipe assembly 52, and a semiconductor cooler 53. The copper / aluminum terminal 51 is in thermal contact with the positive electrode post 12 and the negative electrode post 13. One end of the capillary heat pipe assembly 52 is in thermal contact with the copper / aluminum terminal 51, and the other end is in thermal contact with the semiconductor cooler 53. The capillary heat pipe assembly 52 is wrapped with an insulation sleeve 54.

[0031] In this embodiment, when the battery pack 1 temperature is too high, heat is conducted to the positive terminal 12 and the negative terminal 13. The copper / aluminum terminals 51, which are in contact with the terminal surfaces, quickly transfer the heat to the capillary heat pipe assembly 52. ​​The capillary heat pipe assembly 52 then transfers the heat to the semiconductor cooler 53. After the semiconductor cooler 53 is activated, it dissipates the heat to the external environment. At the same time, the insulation sleeve 54 surrounding the capillary heat pipe assembly 52 reduces the impact of the external environment on heat transfer. The design of the copper / aluminum terminals 51 contacting the terminal surfaces, combined with the efficient long-distance heat transfer characteristics of the capillary heat pipe assembly 52, significantly improves the heat transfer rate, avoids local heat accumulation in the battery pack 1, and reduces the risk of thermal runaway. The capillary heat pipe assembly 52 can be flexibly processed in length and bent to adapt to different installation spaces, improving the flexibility of the starting power supply structure design.

[0032] Optional, please refer to the appendix Figure 4 The insulation layer 6 includes an inner solid-solid phase change material 61 and an outer thermal insulation material 62.

[0033] In this embodiment, the solid-solid phase change material 61 in the inner layer of the insulation layer 6 has a phase change temperature of 0-50°C. When the external temperature is higher than the phase change temperature, it absorbs heat, slowing down the heating rate of the battery pack 1; when the external temperature is lower than the phase change temperature, it releases heat, slowing down the cooling rate. The outer insulation material 62 further blocks heat transfer between the external environment and the battery pack 1, forming a dual insulation structure of thermal buffer and thermal barrier with the inner phase change material 61. This maintains a constant temperature for the battery pack 1, allowing it to remain stable within the optimal operating temperature range even in a wide temperature environment, thus improving the environmental adaptability of the starting power supply. The phase change thermal buffering effect of the solid-solid phase change material 61 reduces the starting frequency of the heating component 4 and the cooling component 5, lowers energy consumption, and extends the service life of the temperature control component.

[0034] Optional, please refer to the appendix Figure 2 It also includes a protection plate 7 and a temperature probe installed inside the housing 2. The protection plate 7 is communicatively connected to the heating element 41 and the semiconductor cooler 53, respectively, and the temperature probe is inserted into the battery pack 1.

[0035] In this embodiment, the protection board 7 installed inside the housing 2 collects the battery temperature in real time through a temperature probe inserted into the battery pack 1. When the temperature is lower than the first preset value, the heating element 41 is activated; when the temperature is higher than the third preset value, the semiconductor cooler 53 is activated. The fully automatic temperature control of the protection board 7 effectively improves the lifespan and performance of the battery pack 1. The protection board 7 centrally controls the heating element 41 and the semiconductor cooler 53, simplifying the circuit structure, reducing fault points, and improving the overall reliability of the starting power supply.

[0036] Based on the same inventive concept, this embodiment also provides a thermal management method for a startup power supply, including the following steps: Step 1: The protection board 7 collects the temperature of battery pack 1 in real time through a temperature probe; Step 2: When the temperature of battery pack 1 is lower than the first preset value, the protection board 7 activates the heating element 41 to heat the battery pack 1. Step 3: When the temperature of battery pack 1 rises to the second preset value, the protection board 7 shuts off the heating element 41. Step 4: When the temperature of battery pack 1 is higher than the third preset value, the protection board 7 activates the semiconductor cooler 53 to cool battery pack 1 through copper / aluminum terminals 51 and capillary heat pipe assembly 52. Step 5: When the temperature of battery pack 1 drops to the fourth preset value, the protection board 7 shuts down the semiconductor cooler 53.

[0037] Furthermore, the first preset value is -20 to 5℃, the second preset value is 0 to 15℃, the third preset value is 35 to 70℃, and the fourth preset value is 30 to 55℃.

[0038] Furthermore, in step two, when the protection board 7 detects that the temperature of the battery pack 1 has risen to the second preset value, the protection board 7 allows the battery pack 1 to be charged.

[0039] Furthermore, when the protection board 7 receives a preheating command or a precooling command sent by a remote terminal, it will start the heating element 41 or the semiconductor cooler 53 in advance when the battery temperature is lower than the first preset value or higher than the third preset value. The remote terminal is a mobile phone, computer, controller, etc.

[0040] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A starting power supply, characterized in that, Includes a battery pack (1) and a housing (2), wherein the battery pack (1) is installed inside the housing (2), and a top cover (3) is sealed on the top of the housing (2), and the top cover (3) is provided with a positive terminal (12) and a negative terminal (13) that are electrically connected to the battery pack (1). The battery pack (1) is composed of multiple cells connected in series or in parallel through busbars (11). The battery pack (1) is equipped with a heating component (4) inside and a cooling component (5) that is thermally connected to the positive terminal (12) and the negative terminal (13) outside. The battery pack (1) is surrounded by an insulation layer (6).

2. The starting power supply according to claim 1, characterized in that, The heating assembly (4) includes a heating element (41), a connecting piece (42), and a thermally conductive insulating adhesive (43). The heating element (41) is attached to one side of the battery pack (1) through the thermally conductive insulating adhesive (43) and the busbar (11). The thermally conductive insulating adhesive (43) is applied to the surface of the busbar (11) and the gap between the busbars (11). One end of the connecting piece (42) is connected to the positive and negative busbars (11) respectively, and the other end is connected to the positive terminal (12) and the negative terminal (13) respectively.

3. The starting power supply according to claim 1, characterized in that, The cooling assembly (5) includes a copper / aluminum terminal (51), a capillary heat pipe assembly (52), and a semiconductor cooler (53). The copper / aluminum terminal (51) is in thermal contact with the positive electrode post (12) and the negative electrode post (13). One end of the capillary heat pipe assembly (52) is in thermal contact with the copper / aluminum terminal (51), and the other end is in thermal contact with the semiconductor cooler (53). The capillary heat pipe assembly (52) is wrapped with an insulation sleeve (54).

4. The starting power supply according to claim 1, characterized in that, The insulation layer (6) includes an inner solid-solid phase change material (61) and an outer thermal insulation material (62).

5. The starting power supply according to claim 1, characterized in that, It also includes a protection plate (7) and a temperature probe installed inside the housing (2). The protection plate (7) is communicatively connected to the heating element (41) and the semiconductor cooler (53), respectively. The temperature probe is electrically connected to the protection plate (7) and inserted into the battery pack (1).

6. A thermal management method for a startup power supply, used to implement the startup power supply according to any one of claims 1-5, characterized in that, Includes the following steps: Step 1: The protection board (7) collects the temperature of the battery pack (1) in real time through a temperature probe; Step 2: When the temperature of the battery pack (1) is lower than the first preset value, the protection board (7) activates the heating element (41) to heat the battery pack (1); Step 3: When the temperature of the battery pack (1) rises to the second preset value, the protection board (7) shuts off the heating element (41). Step 4: When the temperature of the battery pack (1) is higher than the third preset value, the protection board (7) starts the semiconductor cooler (53) to cool the battery pack (1) through the copper / aluminum terminal (51) and the capillary heat pipe assembly (52); Step 5: When the temperature of the battery pack (1) drops to the fourth preset value, the protection board (7) shuts down the semiconductor cooler (53).

7. The thermal management method for a startup power supply according to claim 6, characterized in that, The first preset value is -10 to 5℃, the second preset value is 0 to 15℃, the third preset value is 10 to 25℃, and the fourth preset value is 25 to 40℃.

8. The thermal management method for a startup power supply according to claim 6, characterized in that, In step two, when the protection board (7) detects that the temperature of the battery pack (1) rises to the second preset value, the protection board (7) allows the battery pack (1) to be charged.

9. The thermal management method for a startup power supply according to claim 6, characterized in that, When the protection board (7) receives a preheating command or a precooling command sent by a remote terminal, it will start the heating element (41) or the semiconductor cooler (53) in advance when the battery temperature is lower than the first preset value or higher than the third preset value.

Images