Series-parallel connection switching automobile emergency starting power supply module

Abstract

The utility model provides a series-parallel connection switching automobile emergency starting power supply module, comprising a PCB (Printed Circuit Board) which is provided with a plurality of bonding pads; connection is carried out through an OT terminal; the OT terminal 1 is connected with a negative electrode clamp of the automobile emergency pneumatic power supply, the OT terminal 2 is connected with a negative electrode B1-of the first battery cell group, the OT terminal 3 is connected with a negative electrode B2-of the second battery cell group, the OT terminal 4 is connected with a positive electrode B1 + of the first battery cell group, the OT terminal 5 is connected with a positive electrode B2 + of the second battery cell group, and the OT terminal 6 is connected with a positive electrode clamp of the automobile emergency pneumatic power supply. The PCB is connected with three relays, a load pin of the relay S2 is connected with the bonding pad 1 and the bonding pad 2, a load pin of the relay S1 is connected with the bonding pad 2 and the bonding pad 3, and a load pin of the relay S3 is connected with the bonding pad 3 and the bonding pad 4. And the modular design is adopted, so that connection with a circuit of the battery cell group and an output clamp is facilitated, installation and replacement are convenient, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive emergency starting power supplies, and particularly relates to an automotive emergency starting power supply module with series-parallel switching. Background Art

[0002] Under normal circumstances, the starting and ignition of an automobile can be completed by using the electric energy stored in the automobile battery itself. However, if the automobile battery is aged or the energy storage is insufficient due to other reasons, an additional starting power supply is required to start and ignite, especially in fuel vehicles. An automotive emergency starting power supply is a product designed specifically for a dead automobile battery. It utilizes the characteristic of a large instantaneous discharge current of a lithium battery to provide instantaneous energy for starting the automobile. Generally, for a household automobile (12V battery), the instantaneous current during starting can reach more than 400A, and for commercial vehicles such as trucks and buses (24V batteries), the starting current can reach more than 600A. Since users such as repair shops and truck drivers have the starting requirements for 12V and 24V automobiles, and traditional starting power supplies cannot be used for models with mismatched voltages of the automobile's built-in battery, sometimes it is necessary to find a matching starting power supply separately, which brings inconvenience.

[0003] There are also automotive emergency starting power supplies that can be used for both 12V and 24V in the prior art. Most of these products have the following defects: For starting 12V and 24V automobiles, the position of the terminal needs to be changed, the operation process is complex, and the user experience is poor; when starting a 12V automobile, only the 1st - 4th battery cells are used, and the 5th - 7th battery cells are not used, resulting in insufficient starting ability; after starting a 12V automobile and then starting a 24V automobile, it will cause unbalanced discharge of the battery cells, and the first four battery cells are prone to over-discharge, and in severe cases, the battery cells will be damaged; two chargers are required for charging, which is costly and the operation is complex; the clip is directly connected to the battery and conducts immediately after being clipped, without an intelligent judgment function; if clipped in reverse, it will cause damage to the battery and the starting power supply; if the clip is short-circuited, it will cause damage to the starting power supply; if starting for a long time, it will cause damage to the battery cells of the starting power supply due to over-discharge. It should be noted that being clipped in reverse means that the positive pole of the clip is clipped to the negative pole of the battery, and the negative pole of the clip is clipped to the positive pole of the battery; short-circuiting means that the positive and negative poles of the clip are clipped together. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an improved solution for an automotive emergency starting power supply in view of the deficiencies in the above background art.

[0005] To achieve the above purpose, the utility model provides an automotive emergency starting power supply module with series-parallel switching, corresponding to a first battery cell group and a second battery cell group, including a PCB board, and the PCB board is provided with a plurality of pads;

[0006] A copper nut is provided on each pad. The copper nuts of pad 1 and pad 4 are respectively installed with a negative terminal post and a positive terminal post. The negative terminal post is connected to OT terminal 1, the copper nut of pad 1 is connected to OT terminal 2, the copper nut of pad 2 is connected to OT terminal 3, the copper nut of pad 3 is connected to OT terminal 4, the copper nut of pad 4 is connected to OT terminal 5, and the positive terminal post is connected to OT terminal 6;

[0007] OT terminal 1 is connected to the negative clip of the automotive emergency pneumatic power supply, OT terminal 2 is connected to the negative B1- of the first battery cell group, OT terminal 3 is connected to the negative B2- of the second battery cell group, OT terminal 4 is connected to the positive B1+ of the first battery cell group, OT terminal 5 is connected to the positive B2+ of the second battery cell group, and OT terminal 6 is connected to the positive clip of the automotive emergency pneumatic power supply;

[0008] The PCB board is connected with three relays. The load leg of relay S2 is connected to pad 1 and pad 2, the load leg of relay S1 is connected to pad 2 and pad 3, and the load leg of relay S3 is connected to pad 3 and pad 4.

[0009] Furthermore, relay S1, relay S2, and relay S3 are all provided with relay control legs.

[0010] Furthermore, the relay control legs extend to the other side of the PCB board relative to the relay.

[0011] Furthermore, relay S2, relay S1, and relay S3 are arranged in sequence and linearly.

[0012] Furthermore, the rated current of relay S1 is less than the rated currents of relay S2 and relay S3.

[0013] Furthermore, fixing plates for supporting the negative clip or the positive clip are provided on both the negative terminal post and the positive terminal post.

[0014] The above solution of the present utility model has the following beneficial effects:

[0015] The series-parallel switching automotive emergency starting power supply module provided by the present utility model adopts a modular design, which is convenient for connecting with the circuit of the battery cell group and the output clips, and is easy to install and replace; through the setting of copper nuts, the contact area can be increased when connecting OT terminals, improving the load current; the relays adopt a linear layout, making the distance between the relay load legs and the copper nuts small, effectively shortening the length of the load line, reducing the resistance, and improving the load capacity; in short, the reliability and convenience of the automotive emergency starting power supply are improved, ultimately enhancing the user experience;

[0016] Other beneficial effects of the present utility model will be described in detail in the subsequent specific implementation part. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure and connections of the present utility model;

[0018] Figure 2 It is a schematic diagram of the PCB board of the present utility model;

[0019] Figure 3 It is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 4 It is another schematic diagram of the overall structure of the present utility model;

[0021] Figures 2 - 4 In it, a is the PCB board, b is the pad, c is the copper nut, d is the negative terminal, e is the positive terminal, f is the relay load pin, g is the OT terminal, h is the relay control pin, and i is the fixing plate. Specific Embodiments

[0022] The following uses specific specific examples to illustrate the embodiments of the present disclosure. Those skilled in the art can easily understand other advantages and effects of the present disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts fall within the scope of protection of the present disclosure.

[0023] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present disclosure, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, this device can be implemented and this method can be practiced using other structures and / or functions in addition to one or more of the aspects described herein.

[0024] It should also be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present disclosure in a schematic manner. The diagrams only show the components related to the present disclosure, rather than being drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and proportions of the components in actual implementation can be arbitrarily changed, and the component layout type may also be more complex. Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0025] As Figures 1 - 4 shown, an embodiment of the present invention provides a series-parallel switching automotive emergency starting power supply module. Among them, the automotive emergency starting power supply uses lithium iron phosphate battery cells as the energy unit of the automotive emergency starting power supply. Since the maximum voltage of the lithium iron phosphate battery cell is 3.6V, when starting a 12V vehicle, four series-connected battery cells are used, and the maximum voltage is 14.4V; when starting a 24V vehicle, eight series-connected battery cells are used, and the maximum voltage is 28.8V. In this embodiment, the battery cells are divided into two groups. The first battery cell group is numbered battery cells 1, 2, 3, and 4, and the second battery cell group is numbered battery cells 5, 6, 7, and 8.

[0026] Among them, the negative electrode of battery cell 1 is the negative electrode B1- of the first battery cell group, the positive electrode of battery cell 4 is the positive electrode B1+ of the first battery cell group, the negative electrode of battery cell 5 is the negative electrode B2- of the second battery cell group, and the positive electrode of battery cell 8 is the positive electrode B2+ of the second battery cell group. Inside the two battery cell groups, the battery cells are connected in series in sequence. The negative electrode B1- of the first battery cell group and the positive electrode B2+ of the second battery cell group serve as the output positive electrode and output negative electrode of the entire automotive emergency starting power supply.

[0027] Meanwhile, three relays S1, S2, and S3 are connected in the circuit to achieve series-parallel switching. Among them, relay S1 is set on the connection line between the positive electrode B1+ of the first battery cell group and the negative electrode B2- of the second battery cell group, relay S2 is set on the connection line between the negative electrode B1- of the first battery cell group and the negative electrode B2- of the second battery cell group, and relay S3 is set on the connection line between the positive electrode B1+ of the first battery cell group and the positive electrode B2+ of the second battery cell group. In the 24V mode, relay S1 is closed, and S2 and S3 are open. At this time, the positive electrode B1+ of the first battery cell group is connected to the negative electrode B2- of the second battery cell group, and the first battery cell group and the second battery cell group are in series. The voltage at the clip end is the series voltage of the two battery cell groups; in the 12V mode, relay S1 is open, and S2 and S3 are closed. At this time, the negative electrode B1- of the first battery cell group is connected to the negative electrode B2- of the second battery cell group, and the positive electrode B1+ of the first battery cell group is connected to the positive electrode B2+ of the second battery cell group. The first battery cell group and the second battery cell group are in parallel, and the voltage at the clip end is the parallel voltage of the two battery cell groups. Therefore, in the 24V mode, the current only passes through relay S1; in the 12V mode, the current passes through relays S2 and S3 at the same time. It can be understood that the current passing through relay S1 is larger, while the current passing through relays S2 and S3 is smaller. Therefore, relay S1 needs to select a specification with a larger rated current, and relays S2 and S3 can select specifications with a smaller rated current.

[0028] In this embodiment, relays S1, S2, and S3 are all set on a PCB board. Among them, the PCB board is provided with a plurality of pads 1, 2, 3, and 4. The load pin of relay S2 is connected to pads 1 and 2, the load pin of relay S1 is connected to pads 2 and 3, and the load pin of relay S3 is connected to pads 3 and 4.

[0029] Copper nuts are provided on each pad. The copper nuts of pads 1 and 4 are respectively installed with a negative electrode terminal and a positive electrode terminal. The negative electrode terminal is connected to OT terminal 1, the copper nut of pad 1 is connected to OT terminal 2, the copper nut of pad 2 is connected to OT terminal 3, the copper nut of pad 3 is connected to OT terminal 4, the copper nut of pad 4 is connected to OT terminal 5, and the positive electrode terminal is connected to OT terminal 6.

[0030] Meanwhile, OT terminal 1 is connected to the negative clip of the automotive emergency pneumatic power supply, OT terminal 2 is connected to the negative electrode B1- of the first battery cell group, OT terminal 3 is connected to the negative electrode B2- of the second battery cell group, OT terminal 4 is connected to the positive electrode B1+ of the first battery cell group, OT terminal 5 is connected to the positive electrode B2+ of the second battery cell group, and OT terminal 6 is connected to the positive clip of the automotive emergency pneumatic power supply.

[0031] Therefore, by closing or disconnecting the relays S1, S2, and S3, the above-mentioned series-parallel switching of the battery cell group can be performed, and only the relay control pins on the relays need to be toggled. As a preferred embodiment, in this embodiment, the relay control pins extend to the outside of the PCB board to facilitate control after the module is assembled.

[0032] The series-parallel switching automotive emergency starting power supply module provided in this embodiment is convenient for installation and replacement in a modular manner. In addition, by connecting the OT terminals with copper nuts, the contact area can be increased, and the load current can be increased.

[0033] In addition, in this embodiment, the relays S2, S1, and S3 are arranged in sequence and linearly arranged. By adopting a linear layout method, the distance between the relay load pins and the copper nuts is small, effectively shortening the length of the load line, reducing the resistance, and enhancing the load capacity.

[0034] In addition, in this embodiment, fixing plates are provided on both the negative terminal post and the positive terminal post, which facilitate the support of the negative clip and the positive clip through the fixing plates, further enhancing the stability of the connection.

[0035] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0036] The above embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An automotive emergency starting power supply module with series-parallel switching, corresponding to a first battery cell group and a second battery cell group, characterized in that It includes a PCB board, and multiple pads are provided on the PCB board; Copper nuts are provided on each pad. The copper nuts on pad 1 and pad 4 are respectively installed with a negative terminal post and a positive terminal post. The negative terminal post is connected to OT terminal 1, the copper nut on pad 1 is connected to OT terminal 2, the copper nut on pad 2 is connected to OT terminal 3, the copper nut on pad 3 is connected to OT terminal 4, the copper nut on pad 4 is connected to OT terminal 5, and the positive terminal post is connected to OT terminal 6; OT terminal 1 is connected to the negative clip of the automotive emergency pneumatic power supply, OT terminal 2 is connected to the negative B1- of the first battery cell group, OT terminal 3 is connected to the negative B2- of the second battery cell group, OT terminal 4 is connected to the positive B1+ of the first battery cell group, OT terminal 5 is connected to the positive B2+ of the second battery cell group, and OT terminal 6 is connected to the positive clip of the automotive emergency pneumatic power supply; Three relays are connected to the PCB board. The load leg of relay S2 is connected between pad 1 and pad 2, the load leg of relay S1 is connected between pad 2 and pad 3, and the load leg of relay S3 is connected between pad 3 and pad 4.

2. The automotive emergency starting power supply module with series-parallel switching according to claim 1, characterized in that, Relay control legs are provided on relay S1, relay S2, and relay S3.

3. The automotive emergency starting power supply module with series-parallel switching according to claim 2, characterized in that, The relay control legs extend to the other side of the PCB board relative to the relays.

4. A series-parallel switching automotive emergency starting power supply module according to claim 1, characterized in that, Relays S2, S1, and S3 are arranged in sequence and in a straight line.

5. A series-parallel switching automotive emergency starting power supply module according to claim 1, characterized in that, The rated current of relay S1 is less than the rated currents of relay S2 and relay S3.

6. A series-parallel switching automotive emergency starting power supply module according to claim 1, characterized in that, Fixing plates for supporting the negative clip or the positive clip are provided on the negative terminal post and the positive terminal post.

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