Liquid cooling charger for low-voltage forklift

Abstract

The invention discloses a liquid cooling charger for a low-voltage forklift. The liquid cooling charger comprises a charging module, a liquid cooling module, a charging loop and a liquid cooling loop. One end of the charging loop is electrically connected with the charging module, and when the low-voltage forklift is charged, the other end of the charging loop is electrically connected with a battery of the low-voltage forklift; the liquid cooling loop comprises a liquid inlet pipe and a liquid outlet pipe, one end of the liquid inlet pipe and one end of the liquid outlet pipe are both connected with the liquid cooling module, when the low-voltage forklift is charged, the other end of the liquid inlet pipe is connected with a liquid outlet of the battery, and the other end of the liquid outlet pipe is connected with a liquid inlet of the battery; a liquid cooling structure is integrated on the charging module, a first liquid cooling pipeline and a second liquid cooling pipeline are arranged on the liquid cooling structure, the first liquid cooling pipeline is communicated with the liquid inlet pipe, and the second liquid cooling pipeline is communicated with the liquid outlet pipe. The battery and the charger are respectively cooled in the charging process of the low-voltage forklift, so that the condition that the battery and the charger are severely heated under the condition of high-power charging is effectively avoided, and the charging efficiency is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage forklift battery charging, in particular to a liquid-cooled charger for a low-voltage forklift. Background Art

[0002] With the transformation of the global energy structure, electric vehicles have been increasingly widely used around the world. As a core component of electric vehicles, the technical level and application prospects of lithium batteries have become the focus of attention. As a high-energy, long-life, and environmentally friendly battery, lithium batteries have become one of the most widely used battery types in the field of electric vehicles. In the field of electric vehicles, lithium batteries, as power batteries, are the core components of electric vehicles and directly determine the vehicle's range and power performance. At present, lithium-ion batteries are the most commonly used type of power batteries, which have the advantages of high energy density, long life, and environmental protection.

[0003] With the development of new energy, the charging requirements for lithium batteries are getting higher and higher. When the battery is charged at a high rate, the battery will heat up violently, which will cause the battery temperature to be too high, causing a huge adverse effect on the battery life and performance. Due to cost constraints, low-voltage forklifts on the market are often not equipped with a cooling system, which limits the battery charging function of low-voltage forklifts. Some large-capacity batteries can only be charged with a current lower than the standard charging current, greatly reducing the charging efficiency. Therefore, the cooling design of low-voltage forklifts during charging has become an important research direction. Summary of the invention

[0004] In view of this, the present invention provides a liquid-cooled charger for a low-voltage forklift, which can cool down the battery and charger of the low-voltage forklift during the charging process.

[0005] To achieve the above object, the present invention provides the following technical solutions: A liquid-cooled charger for a low-voltage forklift comprises a charging module, a liquid cooling module, a charging circuit and a liquid cooling circuit.

[0006] Among them, one end of the charging circuit is electrically connected to the charging module, and when the low-voltage forklift is charged, the other end of the charging circuit is electrically connected to the battery of the low-voltage forklift; the liquid cooling circuit includes a liquid inlet pipe and a liquid outlet pipe, one end of the liquid inlet pipe and the liquid outlet pipe are both connected to the liquid cooling module, when the low-voltage forklift is charged, the other end of the liquid inlet pipe is connected to the liquid outlet of the battery, and the other end of the liquid outlet pipe is connected to the liquid inlet of the battery; a liquid cooling structure is integrated on the charging module, and a first liquid cooling pipeline and a second liquid cooling pipeline are arranged on the liquid cooling structure, the first liquid cooling pipeline is connected to the liquid inlet pipe, and the second liquid cooling pipeline is connected to the liquid outlet pipe.

[0007] Preferably, the liquid cooling module includes a refrigerator, a liquid storage tank and an infusion pump, one end of the liquid inlet pipe and the liquid outlet pipe are both connected to the refrigerator, the liquid storage tank is arranged on the liquid inlet pipe, and the infusion pump is arranged on the liquid outlet pipe.

[0008] Preferably, an exhaust port is provided on the liquid outlet pipe.

[0009] The beneficial effects of the present invention are as follows: compared with the prior art, the liquid-cooled charger for a low-voltage forklift disclosed in the present application cools the battery and the charger separately during the charging process of the low-voltage forklift, thereby effectively avoiding the situation where the battery and the charger generate intense heat during high-power charging, and significantly improving the charging efficiency.

[0010] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of a low-voltage forklift liquid-cooled charger of the present invention; Figure 2 is a schematic diagram of a battery system for a low-voltage forklift of the present invention; Figure 3 Schematic diagram of the liquid cooling module of the present invention.

[0012] Reference numerals: 1. Charging module; 11. Liquid cooling structure; 111. First liquid cooling pipeline; 112. Second liquid cooling pipeline; 2. Liquid cooling module; 21. Liquid inlet pipe; 22. Liquid outlet pipe; 23. Refrigerator; 24. Liquid storage tank; 25. Infusion pump; 221. Exhaust port; 3. Charging circuit; 4. Liquid cooling circuit; 5. Battery; 51. Liquid outlet; 52. Liquid inlet; 6. Low-pressure forklift. DETAILED DESCRIPTION

[0013] The present invention discloses a liquid-cooled charger for a low-voltage forklift, which can cool down a battery 5 and a charger of a low-voltage forklift 6 during charging.

[0014] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0015] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0016] Reference below Figures 1 to 3 A low-voltage liquid-cooled charger for a forklift in an embodiment of the present invention is described.

[0017] The embodiment of the present application discloses a liquid-cooled charger for a low-voltage forklift, comprising: a charging module 1, a liquid cooling module 2, a charging circuit 3 and a liquid cooling circuit 4.

[0018] Among them, one end of the charging circuit 3 is electrically connected to the charging module 1, and when the low-voltage forklift 6 is charged, the other end of the charging circuit 3 is electrically connected to the battery 5 of the low-voltage forklift 6; the liquid cooling circuit 4 includes a liquid inlet pipe 21 and a liquid outlet pipe 22, one end of the liquid inlet pipe 21 and the liquid outlet pipe 22 are both connected to the liquid cooling module 2, when the low-voltage forklift 6 is charged, the other end of the liquid inlet pipe 21 is connected to the liquid outlet 51 of the battery 5, and the other end of the liquid outlet pipe 22 is connected to the liquid inlet 52 of the battery 5; a liquid cooling structure 11 is integrated on the charging module 1, and a first liquid cooling pipeline 111 and a second liquid cooling pipeline 112 are arranged on the liquid cooling structure 11, the first liquid cooling pipeline 111 is connected to the liquid inlet pipe 21, and the second liquid cooling pipeline 112 is connected to the liquid outlet pipe 22.

[0019] In this embodiment, when the low-voltage forklift 6 is charged, the liquid cooling module 2 of the charger starts to work, and the low-temperature coolant flows into the liquid inlet 52 of the battery 5 and the second liquid cooling pipeline 112 of the charging module 1 through the liquid outlet pipe 22, respectively, to cool down the battery 5 and the charging module 1, respectively. The coolant that completes the heat exchange in the battery 5 and the charger flows into the liquid inlet pipe 21 through the liquid outlet 51 and the first liquid cooling pipeline 111, respectively, so that the coolant is re-cooled. By cooling the battery 5 and the charger separately during the charging process of the low-voltage forklift 6, the situation of the battery 5 and the charger heating up violently under high-power charging is effectively avoided, and the charging efficiency is significantly improved.

[0020] In some embodiments, the liquid cooling module 2 includes a refrigerator 23, a liquid storage tank 24 and an infusion pump 25, one end of the liquid inlet pipe 21 and the liquid outlet pipe 22 are both connected to the refrigerator 23, the liquid storage tank 24 is arranged on the liquid inlet pipe 21, and the infusion pump 25 is arranged on the liquid outlet pipe 22. The liquid storage tank 24 can collect the coolant that flows into the liquid inlet pipe 21 and completes the heat exchange; the refrigerator 23 can cool down the high-temperature coolant that completes the heat exchange and re-enters the cooling cycle; the infusion pump 25 is used to pump out the cooled coolant so that it can cool down the battery 5 and the charger respectively.

[0021] In some embodiments, the liquid outlet pipe 22 is provided with an exhaust port 221. The exhaust port 221 can exhaust the gas in the cooling circuit to prevent the gas from accumulating in the cooling circuit and affecting the normal circulation of the coolant.

[0022] Other structures and operations of the low-voltage forklift liquid-cooled charger according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0023] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0024] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A liquid-cooled charger for a low-voltage forklift, characterized in that: include: Charging module, liquid cooling module, charging circuit and liquid cooling circuit; One end of the charging circuit is electrically connected to the charging module, and when the low-voltage forklift is charged, the other end of the charging circuit is electrically connected to the battery of the low-voltage forklift; The liquid cooling circuit includes a liquid inlet pipe and a liquid outlet pipe, one end of each of the liquid inlet pipe and the liquid outlet pipe is connected to the liquid cooling module, and when the low-voltage forklift is charged, the other end of the liquid inlet pipe is connected to the liquid outlet of the battery, and the other end of the liquid outlet pipe is connected to the liquid inlet of the battery; The charging module is integrated with a liquid cooling structure, and the liquid cooling structure is provided with a first liquid cooling pipeline and a second liquid cooling pipeline, the first liquid cooling pipeline is connected to the liquid inlet pipe, and the second liquid cooling pipeline is connected to the liquid outlet pipe.

2. The low-voltage forklift liquid-cooled charger according to claim 1, characterized in that: The liquid cooling module includes a refrigerator, a liquid storage tank and an infusion pump. One end of the liquid inlet pipe and the liquid outlet pipe are both connected to the refrigerator. The liquid storage tank is arranged on the liquid inlet pipe, and the infusion pump is arranged on the liquid outlet pipe.

3. The low-voltage forklift liquid-cooled charger according to claim 1, characterized in that: The liquid outlet pipe is provided with an exhaust port.

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