Mine car power battery and heat management system

Abstract

The invention relates to the technical field of new energy automobiles, and discloses a mine car power battery and heat management system which comprises a power distribution cabinet, a main high-voltage box and a slave high-voltage box, the main high-voltage box and the slave high-voltage box are electrically connected with the power distribution cabinet, the main high-voltage box and the slave high-voltage box are both connected with a plurality of power battery branches, and the power battery branches are electrically connected with the main high-voltage box and the slave high-voltage box. Each power battery branch is connected with a heat management unit, the heat management units are connected with the main high-voltage box through high-voltage lines, each power battery branch comprises a plurality of power battery packs, cooling water channels among the power battery packs in each power battery branch are connected in parallel, and the cooling water channels are connected with the heat management units through high-voltage lines. The heat management units are connected with the corresponding heat management units; according to the application, a high-voltage line is simplified, the failure rate is effectively reduced, the heat dissipation and heating performance of each battery pack can be consistent, and the service life of the power battery is prolonged.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicle technology, and specifically to a mining vehicle power battery and thermal management system. Background Art

[0002] In the field of new energy vehicles, both pure electric mining cars and hydrogen mining cars cannot do without power batteries as an important source of power. In the field of mining cars, due to its high power demand, long working hours, and complex working environment, it is necessary to configure enough power batteries and configure a reasonable thermal management system for the power batteries. Due to the space constraints of the entire vehicle, the power battery system needs to be dispersed.

[0003] However, the existing mine car power battery system is not convenient for dispersed layout, resulting in complex high-voltage lines and high power battery failure rate. In addition, the inlet and outlet water temperatures of each power battery pack in the existing power battery system are inconsistent, which affects the power performance of the mine car and even damages the battery life.

[0004] Application Contents

[0005] The purpose of this application is to provide a mining car power battery and thermal management system that simplifies the high-voltage circuit, effectively reduces the failure rate, ensures consistent heat dissipation and heating performance of each battery pack, and improves the life of the power battery.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A mining car power battery and thermal management system of the present invention comprises a power distribution cabinet, and a main high-voltage box and a slave high-voltage box electrically connected to the power distribution cabinet, the main high-voltage box is electrically connected to the slave high-voltage box, the main high-voltage box and the slave high-voltage box are both connected to a plurality of power battery branches, any of the power battery branches is connected to a thermal management unit, and the plurality of thermal management units are connected to the main high-voltage box through a high-voltage line, any of the power battery branches comprises a plurality of power battery packs, and the cooling water circuits between the plurality of power battery packs in each power battery branch are connected in parallel and connected to the corresponding thermal management unit.

[0008] Furthermore, the master high-voltage box and the slave high-voltage box are respectively connected in parallel with a plurality of power battery branches.

[0009] Furthermore, the power battery branch includes a C-box power battery pack and two B-box power battery packs, wherein the power capacity, voltage and heat dissipation power requirements of the C-box power battery pack are greater than those of the B-box power battery pack, and the multiple power battery packs of the power battery branch are connected in series.

[0010] Furthermore, each of the thermal management units is connected to an expansion water tank for accommodating the expansion water of the closed-loop water cooling system.

[0011] Compared with the prior art, the beneficial effects of this application are:

[0012] In actual applications, multiple power battery branches are electrically connected to the distribution cabinet through the main high-voltage box and the slave high-voltage box respectively. When the power battery system needs to be arranged in a dispersed manner, it is conducive to realizing modularization and integration between the high-voltage box and the battery pack, optimizing the wiring harness connection, and reducing the failure rate; each power battery branch is equipped with an independent thermal management unit to meet the heat dissipation and heating requirements of the battery pack of the power battery branch. The cooling water circuits of the multiple battery packs of each power battery branch are connected in parallel with the corresponding thermal management unit, which effectively ensures that the inlet and outlet water temperatures of each battery pack in the power battery branch are consistent, thereby ensuring the consistency of the heat dissipation and heating performance of each battery pack and improving the service life of the power battery system; when arranged in a dispersed manner, all thermal management units are connected to the nearest main high-voltage box, shortening the laid high-voltage line, further optimizing the wiring harness connection, and reducing the failure rate; the present application simplifies the high-voltage line, effectively reduces the failure rate, can ensure the consistency of the heat dissipation and heating performance of each battery pack, and improves the life of the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the electrical structure of this application. DETAILED DESCRIPTION

[0015] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0016] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show the layers related to the present invention rather than being drawn according to the number, shape and size of the layers in actual implementation. In actual implementation, the type, quantity and proportion of each layer may be changed arbitrarily, and the layer layout may also be more complicated.

[0017] In the following description, numerous details are discussed to provide a more thorough explanation of embodiments of the present invention; however, it is apparent to one skilled in the art that embodiments of the present invention may be practiced without these specific details.

[0018] See also Figure 1 , a mining car power battery and thermal management system, including a power distribution cabinet, and a main high-voltage box and a slave high-voltage box electrically connected to the power distribution cabinet, the main high-voltage box is electrically connected to the slave high-voltage box, the main high-voltage box and the slave high-voltage box are both connected to a plurality of power battery branches, any of the power battery branches is connected to a thermal management unit, and the plurality of thermal management units are connected to the main high-voltage box through a high-voltage line, any of the power battery branches includes a plurality of power battery packs, and the cooling water paths between the plurality of power battery packs in each power battery branch are connected in parallel and connected to the corresponding thermal management unit.

[0019] In actual applications, multiple power battery branches are electrically connected to the distribution cabinet through the main high-voltage box and the slave high-voltage box respectively. When the power battery system needs to be arranged in a dispersed manner, it is conducive to realizing modularization and integration between the high-voltage box and the battery pack, optimizing the wiring harness connection, and reducing the failure rate; each power battery branch is equipped with an independent thermal management unit to meet the heat dissipation and heating requirements of the battery pack of the power battery branch. The cooling water circuits of the multiple battery packs of each power battery branch are connected in parallel with the corresponding thermal management unit, which effectively ensures that the inlet and outlet water temperatures of each battery pack in the power battery branch are consistent, thereby ensuring the consistency of the heat dissipation and heating performance of each battery pack and improving the service life of the power battery system; when arranged in a dispersed manner, all thermal management units are connected to the nearest main high-voltage box, shortening the laid high-voltage line, further optimizing the wiring harness connection, and reducing the failure rate; the present application simplifies the high-voltage line, effectively reduces the failure rate, can ensure the consistency of the heat dissipation and heating performance of each battery pack, and improves the life of the power battery.

[0020] See also Figure 1 The main high-voltage box and the slave high-voltage box are respectively connected in parallel with multiple power battery branches.

[0021] In this embodiment, the main high-voltage box and the slave high-voltage box are respectively connected to two power battery branches in parallel. According to the power and power requirements of the entire vehicle, a sufficient number of power battery branches can be respectively connected to the main high-voltage box and the slave high-voltage box in parallel.

[0022] See also Figure 1 The power battery branch includes a C-box power battery pack and two B-box power battery packs, wherein the power, voltage and heat dissipation power requirements of the C-box power battery pack are greater than those of the B-box power battery pack, and the multiple power battery packs of the power battery branch are connected in series.

[0023] In this embodiment, in order to meet the voltage requirements of the entire vehicle, a C-box power battery pack and two B-box power battery packs in the power battery branch are connected in series, and the power, voltage and heat dissipation power requirements of the C-box power battery pack are greater than those of the B-box power battery pack.

[0024] See also Figure 1 Each of the thermal management units is connected to an expansion water tank for accommodating the expansion water of the closed-loop water cooling system.

[0025] In this embodiment, the expansion water tank, on the one hand, accommodates the expansion water volume of the closed-loop water cooling system, and on the other hand, serves as a filling port to replenish water for the cooling system.

[0026] In the above-mentioned embodiments, although the present invention has been described in conjunction with the specific embodiments of the present invention, many replacements, modifications and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. The embodiments of the present invention are intended to cover all such replacements, modifications and variations falling within the broad scope of the appended claims.

[0027] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A mine car power battery and thermal management system, characterized in that: It includes a power distribution cabinet, and a main high-voltage box and a slave high-voltage box electrically connected to the power distribution cabinet, the main high-voltage box is electrically connected to the slave high-voltage box, the main high-voltage box and the slave high-voltage box are both connected to multiple power battery branches, any of the power battery branches is connected to a thermal management unit, and the multiple thermal management units are connected to the main high-voltage box through high-voltage lines, any of the power battery branches includes multiple power battery packs, and the cooling water circuits between the multiple power battery packs in each power battery branch are connected in parallel and connected to the corresponding thermal management unit.

2. A mining vehicle power battery and thermal management system according to claim 1, characterized in that: The master high-voltage box and the slave high-voltage box are respectively connected in parallel with a plurality of power battery branches.

3. A mining vehicle power battery and thermal management system according to claim 1, characterized in that: The power battery branch includes a C-box power battery pack and two B-box power battery packs, wherein the power capacity, voltage and heat dissipation power requirements of the C-box power battery pack are greater than those of the B-box power battery pack, and the multiple power battery packs of the power battery branch are connected in series.

4. A mining vehicle power battery and thermal management system according to claim 1, characterized in that: Each of the thermal management units is connected to an expansion water tank for accommodating the expansion water of the closed-loop water cooling system.

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