Direct current transient on-load circuit

Abstract

The utility model provides a direct-current transient on-load circuit, and relates to the technical field of batteries, and the direct-current transient on-load circuit comprises a direct-current power supply, a resistor unit, an energy storage unit, a first load and a second load. The first load is a load of which the continuous working current is within a preset rated current range of the direct-current power supply, and the second load is a load of which the transient working current is outside the preset rated current range; wherein the power interface of the direct-current power supply is connected with the power supply interface of the first load, the power interface of the direct-current power supply is also connected with the power supply interface of the second load through the resistor unit, and the power supply interface of the second load is also connected with the energy storage unit. Therefore, through the common resistor unit and the energy storage unit, the technical problems of difficulty in model selection and high price of the direct-current power supply in the prior art are solved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a DC transient load circuit. Background Art

[0002] In practical applications of DC transient load circuits, it is usually only necessary to power relatively low-power DC loads. However, it is more difficult to power relatively high-power transient loads, such as motors and trip units.

[0003] The existing approach is to select a DC power supply whose power is the sum of the normal load and the transient load to meet the power supply needs of the larger transient load. However, this approach often leads to problems such as difficulty in selecting a DC power supply and high price. Utility Model Content

[0004] The present application aims to provide a DC transient load circuit that eliminates the need to consider the power and selection of a DC power supply, and in which the price of the resistor unit and energy storage unit is relatively low compared to the price of the DC power supply. This alleviates the technical problems of the existing technology of difficult selection and high cost of DC power supplies.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a DC transient load circuit, comprising: a DC power supply, a resistor unit, an energy storage unit, a first load, and a second load; the first load is a load whose continuous operating current is within a preset rated current range of the DC power supply, and the second load is a load whose transient operating current is outside the preset rated current range;

[0007] The power interface of the DC power supply is connected to the power interface of the first load, and the power interface of the DC power supply is also connected to the power interface of the second load through the resistance unit, and the power interface of the second load is also connected to the energy storage unit.

[0008] Optionally, the resistance unit includes: a first resistor and a second resistor, and the positive power interface and the negative power interface of the DC power supply are connected to the positive power interface and the negative power interface of the second load through the first resistor and the second resistor respectively.

[0009] Optionally, the resistance unit includes: a first resistor, and the positive power supply interface of the DC power supply is connected to the positive power supply interface of the second load through the first resistor.

[0010] Optionally, the resistance unit includes: a second resistor, and the negative power supply interface of the DC power supply is connected to the negative power supply interface of the second load through the second resistor.

[0011] Optionally, the energy storage unit is connected between the positive power interface and the negative power interface of the second load.

[0012] Optionally, the energy storage unit is a supercapacitor, an electrolytic capacitor or a battery unit.

[0013] Optionally, the resistance unit includes: a current-limiting resistor, or a thermistor.

[0014] Optionally, the DC power supply is: a power adapter, a high-voltage DC source, a battery optimizer, or a motor-specific power supply.

[0015] Optionally, there are multiple second loads, there are multiple groups of resistance units, and there are multiple energy storage units. The power supply interface of the DC power supply is respectively connected to the power supply interfaces of the multiple second loads through the multiple groups of resistance units, and the power supply interfaces of the multiple second loads are respectively connected to the multiple energy storage units.

[0016] Optionally, the second load is a motor or a trip unit.

[0017] The beneficial effects of the DC transient load circuit provided by this application are:

[0018] The present application provides a DC transient load circuit, which is composed of a DC power supply, a resistor unit, an energy storage unit, a first load and a second load; the first load is a load whose continuous working current is within the preset rated current range of the DC power supply, and the second load is a load whose transient working current is outside the preset rated current range; wherein, the power interface of the DC power supply is connected to the power supply interface of the first load, for supplying power to the first load, and the power interface of the DC power supply is also connected to the power supply interface of the second load through the resistor unit, and the power supply interface of the second load is also connected to the energy storage unit, for supplying power to the second load normally. Therefore, the present application can realize the normal power supply demand of the second load through the energy storage unit and the resistor unit, which is simple and inexpensive. At the same time, since the normal power supply demand of the second load is realized through the energy storage unit and the resistor unit, there is no restriction on the power selection of the DC power supply, which solves the problem of difficulty in selecting the DC power supply in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A schematic diagram of a DC transient load circuit provided in an embodiment of the present application Figure 1 ;

[0021] Figure 2 A schematic diagram of a DC transient load circuit provided in an embodiment of the present application Figure 2 ;

[0022] Figure 3 A schematic diagram of a DC transient load circuit provided in an embodiment of the present application Figure 3 ;

[0023] Figure 4 A schematic diagram of a DC transient load circuit provided in an embodiment of the present application Figure 4 ;

[0024] Figure 5 A schematic diagram of a DC transient load circuit provided in an embodiment of the present application Figure 5 . DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0028] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0030] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0031] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0032] To better understand the various solutions provided in the embodiments of the present application, a DC transient load circuit provided in the embodiments of the present application is described in detail below in conjunction with the accompanying drawings.

[0033] Figure 1 A schematic diagram of a DC transient load circuit provided in an embodiment of the present application Figure 1 .like Figure 1 As shown, the DC transient load circuit 100 may include: a DC power supply 110 , a resistor unit 120 , an energy storage unit 130 , a first load 140 and a second load 150 .

[0034] Among them, the first load 140 is a load whose continuous operating current is within the preset rated current range of the DC power supply, that is, the first load 140 is a normally operable load; the second load 150 is a load whose transient operating current is outside the preset rated current range, that is, the second load 150 is a transient load; among them, the preset rated current range can be selected according to actual conditions.

[0035] The power interface of the DC power supply 110 is connected to the power interface of the first load 140 for supplying normal power to the first load 140. The power interface of the DC power supply 110 is also connected to the power interface of the second load 150 via the resistor unit 120. The power interface of the second load 150 is also connected to the energy storage unit 130 for supplying power to the second load 150 via the resistor unit 120 and the energy storage unit 130. This allows the DC power supply 110 to carry the load normally when a large second load 150 (such as a transient load) is applied within a preset time, and the voltage of the second load 150 is also within the preset normal voltage specification range. The preset time can be selected based on actual conditions, and the preset time should be selected within seconds. For example, the preset time can be selected as 10ms. The preset normal voltage specification range can also be selected based on actual conditions.

[0036] The resistance unit 120 can separate the first load 140 from the second load 150 to avoid the second load from causing overcurrent protection, and can also ensure the reliable operation of the first load 140 .

[0037] It should be noted that when the energy storage unit 130 can be used for charging, the energy storage unit 130 is charged through the resistance unit 120. The resistance unit 120 can limit the charging current of the energy storage unit 130 to protect the energy storage unit 130. It can also avoid the charging current being too large during charging, and provide overcurrent protection for the DC power supply 110. When the energy storage unit 130 is full, the energy of the energy storage unit 130 is 1 / 2*(CV1^2). Among them, V1 is the voltage across the energy storage unit 130 when it is full; C is the capacitance of the energy storage unit 130. When the energy storage unit 130 can be used for discharging, when the DC power supply 110 is connected to the second load 150 (such as a transient load), the second load 150 (such as a transient load) is discharged through the energy storage unit 130. At this time, the resistance unit 120 can limit the current of the DC power supply 110, avoid the DC power supply 110 from having an overcurrent problem, and achieve overcurrent protection for the DC power supply 110. In one possible embodiment, for example, if the lowest voltage specification of the preset normal voltage specification range is V2, the energy of the energy storage unit 130 is 1 / 2*(C(V1^2)-(V2^2))=P*T. Here, P is the transient power of the second load 150, and P=U*I (U is the transient voltage of the second load 150, and I is the transient current of the second load 150). T is the transient duration of the second load 150, and T=RC (R is the resistance value of the resistance unit 120). At this time, the capacitance value C of the energy storage unit 130 is the minimum required capacitance value.

[0038] The resistance unit 120 and the energy storage unit 130 may be set to different sizes according to the transient duration T of the second load 150 and the size of the transient current I of the second load 150 .

[0039] In addition, it should be noted that the DC power supply 110 can be selected in any manner according to actual circumstances. For example, the DC power supply 110 in this application can be replaced by an existing DC power supply module. In other words, the DC power supply 110 in this application can be replaced in any manner according to whether power is required for the second load 150, thereby resolving the difficulty in selecting the DC power supply 110 in the prior art.

[0040] The present application provides a DC transient load circuit, which is composed of a DC power supply, a resistor unit, an energy storage unit, a first load and a second load; the first load is a load whose continuous working current is within the preset rated current range of the DC power supply, and the second load is a load whose transient working current is outside the preset rated current range; wherein, the power interface of the DC power supply is connected to the power supply interface of the first load, for supplying power to the first load, and the power interface of the DC power supply is also connected to the power supply interface of the second load through the resistor unit, and the power supply interface of the second load is also connected to the energy storage unit, for supplying power to the second load normally. Therefore, the present application can realize the normal power supply demand of the second load through the energy storage unit and the resistor unit, which is simple and inexpensive. At the same time, since the normal power supply demand of the second load is realized through the energy storage unit and the resistor unit, there is no restriction on the power selection of the DC power supply, which solves the problem of difficulty in selecting the DC power supply in the prior art.

[0041] Optionally, in a possible implementation, the energy storage unit 130 is connected between the positive power interface and the negative power interface of the second load 150 to control the charging and discharging time and speed of the second load 150 through the energy storage unit 130 .

[0042] Optionally, in a possible implementation, the energy storage unit 130 may be a supercapacitor, an electrolytic capacitor, or a battery unit.

[0043] In a possible embodiment, if the energy storage unit 130 is an electrolytic capacitor, the electrolytic capacitor is a large-capacitance electrolytic capacitor. If the energy storage unit 130 is a battery unit, the battery unit is a rechargeable and dischargeable battery.

[0044] Taking the energy storage unit 130 as the supercapacitor C1 as an example, the DC transient load circuit provided in the embodiment of the present application will be described below with reference to the accompanying drawings. Figure 2 A schematic diagram of a DC transient load circuit provided in an embodiment of the present application Figure 2 .like Figure 2 As shown, the resistance unit 120 may include a first resistor R1 and a second resistor R2.

[0045] Among them, the positive power supply interface and negative power supply interface of the DC power supply 110 are respectively connected to the positive power supply interface and negative power supply interface of the second load 150 through the first resistor R1 and the second resistor R2; and one end of the first resistor R1 and the second resistor R2 are also connected to the two ends of the energy storage unit 130; used to provide normal power supply to the second load 150; the positive power supply interface and negative power supply interface of the DC power supply are respectively connected to the positive power supply interface and negative power supply interface of the first load 140, used to power the first load 140.

[0046] It should be noted that Figure 2In the DC power supply 110 , the first load 140 , and the second load 150 , 1 and 2 represent a positive power interface and a negative power interface, respectively.

[0047] In the DC transient load circuit provided in the present application, the resistance unit can be composed of a first resistor and a second resistor. The positive power supply interface and the negative power supply interface of the DC power supply are respectively connected to the positive power supply interface and the negative power supply interface of the second load through the first resistor and the second resistor to reduce the discharge time of the energy storage unit and achieve normal power supply to the second load.

[0048] exist Figure 2 On this basis, the DC transient load circuit provided in the embodiment of the present application is described below with reference to the accompanying drawings. Figure 3 A schematic diagram of a DC transient load circuit provided in an embodiment of the present application Figure 3 .like Figure 3 As shown, the resistance unit 120 may include: a first resistor R1.

[0049] Among them, the positive power supply interface of the DC power supply 110 is connected to the positive power supply interface of the second load 150 through the first resistor R1; the positive power supply interface of the second load 150 is also connected to one end of the energy storage unit 130; the negative power supply interface of the DC power supply 110 is respectively connected to the negative power supply interface of the second load 150 and the other end of the energy storage unit 130, for providing normal power supply to the second load 150, and the positive power supply interface and negative power supply interface of the DC power supply are respectively connected to the positive power supply interface and negative power supply interface of the first load 140, for supplying power to the first load 140.

[0050] In the DC transient load circuit provided in the present application, the resistance unit can be composed of a first resistor, and the positive power supply interface of the DC power supply is connected to the positive power supply interface of the second load through the first resistor, so as to reduce the discharge time of the energy storage unit through a first resistor and realize normal power supply of the second load.

[0051] exist Figure 2 On this basis, the DC transient load circuit provided in the embodiment of the present application is described below with reference to the accompanying drawings. Figure 4 A schematic diagram of a DC transient load circuit provided in an embodiment of the present application Figure 4 .like Figure 4 As shown, the resistance unit 120 may include: a second resistor R2.

[0052] Among them, the negative power supply interface of the DC power supply 110 is connected to the negative power supply interface of the second load 150 through the second resistor R2, the positive power supply interface of the DC power supply 110 is connected to the positive power supply interface of the second load 150, and the two ends of the energy storage unit 130 are respectively connected to the positive power supply interface of the second load 150 and the negative power supply interface of the second load 150, which are used to provide normal power supply to the second load 150. The positive power supply interface and negative power supply interface of the DC power supply are respectively connected to the positive power supply interface and negative power supply interface of the first load 140, which are used to power the first load 140.

[0053] In the DC transient load circuit provided in the present application, the resistance unit can be composed of a second resistor, and the negative power supply interface of the DC power supply is connected to the negative power supply interface of the second load through the second resistor, so as to reduce the discharge time of the energy storage unit through a second resistor and realize normal power supply of the second load.

[0054] Optionally, in a possible implementation, the resistance unit 120 may include: a current-limiting resistor, or a thermistor NTC.

[0055] In one possible embodiment, the function of the resistor unit 120 in this application is to limit the charging current of the second load 150 to prevent damage to the DC transient load circuit. Therefore, the resistor unit 120 in this application can be a current-limiting resistor. Furthermore, due to the inherent current-limiting function of the NTC thermistor, the resistor unit 120 in this application can be replaced by an NTC thermistor.

[0056] Optionally, in one possible implementation, the DC power supply 110 may be: a power adapter, a high-voltage DC source, a battery optimizer, or a motor-specific power supply.

[0057] In one possible embodiment, the DC power supply 110 can be any DC power supply, or a DC power supply that needs to carry a transient load, such as a power adapter, a high-voltage DC source, a battery optimizer, or a motor-specific power supply, etc. This is not a limitation.

[0058] Optionally, in one possible implementation, the number of second loads 150 can be multiple, the corresponding number of resistance units 120 is multiple groups, and the number of energy storage units 130 is multiple; the power interface of the DC power supply 110 is respectively connected to the power supply interfaces of multiple second loads 150 through multiple groups of resistance units 120, and the power supply interfaces of multiple second loads 150 are respectively connected to multiple energy storage units 130, so as to provide normal power supply for multiple second loads 150.

[0059] For example, Figure 5 A schematic diagram of a DC transient load circuit provided in an embodiment of the present application Figure 5 ,like Figure 5As shown, the resistance unit 120 is composed of a first resistor R1 and a second resistor R2, and the energy storage unit 130 is a supercapacitor C1. The positive power interface and the negative power interface of the DC power supply 110 are respectively connected to the positive power supply interface and the negative power supply interface of the first load 140; the positive power interface of the DC power supply 110 is also connected to the positive power supply interfaces of multiple second loads 150 through multiple first resistors R1; the negative power interface of the DC power supply 110 is also connected to the negative power supply interfaces of multiple second loads 150 through multiple second resistors R2; the two ends of the multiple energy storage units 130 are respectively connected to the positive power supply interfaces of the multiple second loads 150 and the negative power supply interfaces of the multiple second loads 150, so as to realize normal power supply of the multiple second loads 150. The multiple second loads 150 are connected in parallel, and each second load 150 requires a corresponding energy storage unit 130 and a resistance unit 120. In this way, to achieve normal power supply for the second load 150, it is only necessary to connect multiple resistor units 120 to the power supply interfaces of multiple second loads 150 at the power interface of the DC power supply 110, and connect the power supply interfaces of the multiple second loads 150 to multiple energy storage units 130 respectively. This can be achieved without selecting the power model of the DC power supply 110, which saves costs and facilitates installation in the DC transient load circuit.

[0060] Optionally, in a possible implementation, the second load 150 may be a motor or a trip unit.

[0061] Since the second load 150 is a transient load whose transient operating current is outside the preset rated current range, the second load 150 can be selected as a motor or a trip unit with a relatively large transient power. This is only an example and is not intended to be limiting.

[0062] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A DC transient load circuit, characterized in that: include: A DC power supply, a resistance unit, an energy storage unit, a first load, and a second load; the first load is a load whose continuous operating current is within a preset rated current range of the DC power supply, and the second load is a load whose transient operating current is outside the preset rated current range; The power interface of the DC power supply is connected to the power interface of the first load, and the power interface of the DC power supply is also connected to the power interface of the second load through the resistance unit, and the power interface of the second load is also connected to the energy storage unit.

2. The DC transient load circuit according to claim 1, characterized in that: The resistance unit includes: a first resistor and a second resistor, and the positive power interface and the negative power interface of the DC power supply are connected to the positive power interface and the negative power interface of the second load through the first resistor and the second resistor respectively.

3. The DC transient load circuit according to claim 1, characterized in that: The resistance unit includes: a first resistor, and the positive power supply interface of the DC power supply is connected to the positive power supply interface of the second load through the first resistor.

4. The DC transient load circuit according to claim 1, characterized in that: The resistance unit includes: a second resistor, and the negative power supply interface of the DC power supply is connected to the negative power supply interface of the second load through the second resistor.

5. The DC transient load circuit according to claim 1, characterized in that: The energy storage unit is connected between the positive power interface and the negative power interface of the second load.

6. The DC transient load circuit according to claim 1, characterized in that: The energy storage unit is a supercapacitor, an electrolytic capacitor or a battery unit.

7. The DC transient load circuit according to claim 1, characterized in that: The resistance unit includes: a current limiting resistor or a thermistor.

8. The DC transient load circuit according to claim 1, characterized in that: The DC power supply is: a power adapter, a high-voltage DC source, a battery optimizer, or a motor-specific power supply.

9. The DC transient load circuit according to claim 1, characterized in that: There are multiple second loads, multiple groups of resistance units, and multiple energy storage units. The power supply interface of the DC power supply is connected to the power supply interfaces of the multiple second loads through the multiple groups of resistance units. The power supply interfaces of the plurality of second loads are respectively connected to the plurality of energy storage units.

10. The DC transient load circuit according to any one of claims 1 to 9, characterized in that: The second load is a motor or a release.

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