Lithium battery module with starting delay

Abstract

The utility model provides a lithium battery module with starting delay. The lithium battery module comprises an outer shell, a lithium battery pack and a management circuit board, wherein the lithium battery pack and the management circuit board are arranged in the outer shell; the outer shell is provided with a power supply positive electrode connector and a power supply negative electrode connector, the management circuit board is provided with a BMS module, and the BMS module is coupled with a lithium battery pack for battery management; the anode output and the cathode output of the lithium battery pack are respectively coupled with the power supply anode connector and the power supply cathode connector, at least one resistor is connected in series between the cathode output of the lithium battery pack and the power supply cathode connector, and the resistor is used for increasing the internal resistance of a circuit, so that the external voltage drop of the battery is increased; the engine starting time is prolonged when power is supplied to engine starting. The lithium battery module disclosed by the utility model can be used as a storage battery for starting an automobile instead of an existing lead-acid battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field, concretely relates to a lithium battery module with starting delay. BACKGROUND

[0002] The starting storage battery configured on the automobile is usually a lead-acid battery. With the development of battery technology, lithium battery has advantages of high energy density, small volume and light weight, no memory effect, low self-discharge rate, fast charging and wide environmental adaptability, and thus is more advantageous than the existing lead-acid battery when used as a starting storage battery on the automobile. However, since the voltage platform of the lithium battery is slightly higher than that of the lead-acid battery, in the case that the voltage of the lithium battery is relatively high, the starting time of the engine of some vehicle models is relatively short when the lithium battery is used as a starting storage battery, which may cause the engine to automatically shut down. Therefore, the circuit needs to be specially designed to prolong the starting time. SUMMARY

[0003] Based on the above background, the utility model provides a lithium battery module with starting delay to replace the existing lead-acid battery as a starting storage battery for an automobile. The following technical solutions are specifically adopted:

[0004] A lithium battery module with starting delay, comprising a shell, a lithium battery pack and a management circuit board installed in the shell; the shell is provided with a power positive terminal and a power negative terminal, the management circuit board is provided with a BMS module, the BMS module is coupled with the lithium battery pack for battery management; the positive output and the negative output of the lithium battery pack are coupled with the power positive terminal and the power negative terminal respectively, and at least one resistor is connected in series between the negative output of the lithium battery pack and the power negative terminal, the resistor is used to increase the internal resistance of the circuit, thereby increasing the external pressure drop of the battery, so as to prolong the starting time of the engine when supplying power to the engine.

[0005] Further, a discharge MOS switch and a charging MOS switch are connected in series between the negative output of the lithium battery pack and the power negative terminal.

[0006] Further, the shell comprises a bottom shell with an upper opening, an upper cover matched with the opening of the bottom shell, and a mounting bracket arranged in the bottom shell, the power positive terminal and the power negative terminal are mounted on the upper cover and connected with the positive and negative outputs of the lithium battery pack through copper terminal.

[0007] Further, the mounting bracket comprises a rectangular frame and a partition plate arranged in the rectangular frame, the partition plate divides the rectangular frame into two lithium battery pack mounting areas; the two ends of the rectangular frame are provided with a plurality of through screw mounting holes, and the bottom shell is provided with a fixing seat corresponding in position to the screw mounting holes.

[0008] Further, the top of the rectangular frame body is provided with an insulating corrosion-resistant diaphragm for isolating the lithium battery pack from the management circuit board.

[0009] Further, the management circuit board is further provided with a communication module electrically connected with the BMS module, the communication module is provided with a 4G module and a Bluetooth module, and the management circuit board is provided with a Bluetooth antenna coupled with the Bluetooth module.

[0010] Further, the upper cover is further provided with a power-on button electrically connected with the management circuit board.

[0011] Further, traction pull ropes are arranged on both sides of the shell.

[0012] The lithium battery module with starting delay has the advantages that: the lithium battery module can replace the existing lead-acid battery to be used as a starting storage battery for a car, has the advantages of small size, light weight, long service life, low self-discharge rate, fast charging and discharging, etc.

[0013] The lithium battery module with starting delay has the advantages that: the lithium battery module can replace the existing lead-acid battery to be used as a starting storage battery for a car, has the advantages of small size, light weight, long service life, low self-discharge rate, fast charging and discharging, etc. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an external schematic view of the lithium battery module embodiment.

[0015] Figure 2 It is an internal schematic view of the lithium battery module embodiment.

[0016] Figure 3 It is a shell base schematic view of the lithium battery module embodiment.

[0017] Figure 4 It is an installation support schematic view of the lithium battery module embodiment.

[0018] Figure 5 It is a circuit connection schematic view of the lithium battery module embodiment. DETAILED DESCRIPTION

[0019] Embodiments of the present application will be described in more detail below with reference to the drawings. Although some embodiments of the present application are shown in the drawings, it is understood that the present application can be implemented in various forms and should not be interpreted as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present application can be more thoroughly and completely understood. It should be understood that the drawings and embodiments of the present application are for illustrative purposes only and are not intended to limit the scope of the present application.

[0020] The single resistor in the circuit schematic diagram can be replaced by a plurality of resistors in series or in parallel in the actual circuit, and the present application is not limited thereto.

[0021] Referring to Figures 1-5 , the embodiment of the present application provides a lithium battery module with starting delay, which comprises a shell body 1, and a lithium battery pack and a management circuit board 2 installed in the shell body. The shell body 1 comprises a bottom shell 10 with an upper opening, an upper cover 11 matched with the opening of the bottom shell 10, and a mounting bracket 12 arranged in the bottom shell. The upper cover 11 is provided with a power positive terminal 13 and a power negative terminal 14, which are connected with the positive and negative output terminals of the lithium battery pack through copper wire terminals 15.

[0022] As a preferred embodiment, referring to Figure 3 and Figure 4 , the mounting bracket 12 comprises a rectangular frame 120 and a partition plate 121 arranged in the rectangular frame, and the partition plate 121 divides the rectangular frame into two lithium battery pack mounting areas. The two ends of the rectangular frame 120 are provided with a plurality of through screw mounting holes 122, and the corresponding bottom shell 10 is provided with a fixing seat 101 corresponding in position to the screw mounting holes 122. Thus, a fixing screw can be inserted from the fixing hole on the upper cover 11, and fixed in the screw hole on the fixing seat 101 through the screw mounting hole 122, so as to realize stable installation of the mounting bracket 12 and the lithium battery pack therein.

[0023] Referring to Figure 2 , in the embodiment, the management circuit board 2 is installed above the mounting bracket 12, and in order to protect it, an insulating corrosion-resistant diaphragm (not shown in the figure) is further arranged on the top of the rectangular frame 120 to separate the lithium battery pack and the management circuit board.

[0024] As a preferred embodiment, in the embodiment, a BMS module 20 is arranged on the management circuit board 2, and the BMS module 20 is coupled with the lithium battery pack for battery management. Referring to Figure 5 , the BMS module comprises a BMS (power management system) module, which is electrically connected with the battery cells of the lithium battery pack for voltage sampling, and is electrically connected with a current sampling resistor for current sampling. The BMS module is also electrically connected with a temperature sensor and a communication plug-in.

[0025] Since the voltage platform of the lithium battery is slightly higher than that of the lead-acid battery, when the voltage of the lithium battery is high, the engine starting time is short when the lithium battery is used as a starting power source, and the engine may be automatically extinguished. Therefore, in the scheme of the utility model, a resistor is connected in series between the negative output of the lithium battery pack and the power supply negative electrode, the resistor can increase the internal resistance of the circuit, thereby increasing the external pressure drop of the battery, so as to prolong the engine starting time when the engine is started.

[0026] As a preferred embodiment, in this embodiment, the resistor is a 200A, 4mΩ resistor. Before the resistor is added, when the lithium battery is used as a starting power source, the starting time is between 700ms and 800ms, which is too short and easy to cause the engine to be extinguished. After the resistor is connected in series, the starting time can be prolonged to 1.5±0.3S, which is a normal value, and the engine can run stably.

[0027] In this embodiment, a discharge MOS switch and a charge MOS switch are also connected in series between the negative output of the lithium battery pack and the power supply negative electrode to control charging and discharging.

[0028] As a further preferred embodiment, in this embodiment, the management circuit board 2 is provided with a communication module 21 electrically connected with the BMS module, the communication module is provided with a 4G module and a Bluetooth module, and the management circuit board 2 is also provided with a Bluetooth antenna 22 coupled with the Bluetooth module.

[0029] Referring to Figure 1 In this embodiment, the upper cover 11 is also provided with a forced restart button 16 electrically connected with the management circuit board 2, which can execute forced restart of the lithium battery module in special cases.

[0030] Further, the two sides of the outer shell 1 are also provided with traction ropes 17 to facilitate carrying.

[0031] The embodiments of the utility model are intended to cover all such alternatives, modifications and variations falling within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent replacements, improvements and the like made within the spirit and principles of the embodiments of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lithium battery module with start-up delay, characterized in that, The application relates to a lithium battery pack and management circuit board, which are installed in an outer shell; a power positive terminal and a power negative terminal are arranged on the outer shell; a BMS module is arranged on the management circuit board; the BMS module is coupled with the lithium battery pack for battery management; the positive output and the negative output of the lithium battery pack are coupled with the power positive terminal and the power negative terminal respectively; at least one resistor is connected in series between the negative output of the lithium battery pack and the power negative terminal, the resistor is used for increasing the internal resistance of a circuit, thereby increasing the external pressure drop of the battery, and the engine starting time is prolonged when the engine is started.

2. The start-up delay lithium battery module of claim 1, wherein, A discharge MOS switch and a charging MOS switch are connected in series between the negative output of the lithium battery pack and the power negative terminal.

3. The start-up delay lithium battery module of claim 1, wherein, The outer shell comprises a bottom shell with an upper opening, an upper cover matched with the opening of the bottom shell, and a mounting bracket arranged in the bottom shell; the power positive terminal and the power negative terminal are mounted on the upper cover and connected with the positive and negative outputs of the lithium battery pack through copper terminal.

4. The start-up delay lithium battery module of claim 3, wherein, The mounting bracket comprises a rectangular frame and a partition plate arranged in the rectangular frame; the partition plate divides the rectangular frame into two lithium battery pack mounting areas; screw mounting holes are arranged at both ends of the rectangular frame; fixed seats corresponding to the screw mounting holes are arranged in the bottom shell.

5. The start-up delay lithium battery module of claim 4, wherein, An insulating corrosion-resistant diaphragm is arranged on the top of the rectangular frame to isolate the lithium battery pack and the management circuit board.

6. The start-up delay lithium battery module of claim 1, wherein, A communication module electrically connected with the BMS module is arranged on the management circuit board; the communication module is provided with a 4G module and a Bluetooth module; a Bluetooth antenna coupled with the Bluetooth module is arranged on the management circuit board.

7. The start-up delay lithium battery module of claim 3, wherein, A strong starting button electrically connected with the management circuit board is arranged on the upper cover.

8. The start-up delay lithium battery module of any one of claims 1-7, wherein, Traction ropes are arranged on both sides of the outer shell.

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