High-voltage battery pack based on 300-600V

Abstract

The utility model provides a 300-600V-based high-voltage battery pack, each lithium battery cluster is formed by connecting a plurality of lithium battery modules in series, each lithium battery module is provided with a battery positive interface, a battery negative interface, a low-voltage input interface and a low-voltage output interface, and a junction box is provided with a plurality of battery positive interfaces and battery negative interfaces. A battery positive interface at the initial end of the lithium battery cluster is correspondingly and electrically connected with a battery positive interface of the junction box, a battery negative interface at the tail end of the lithium battery cluster is correspondingly and electrically connected with a battery negative interface of the junction box, and the low-voltage electric control module is provided with a low-voltage input interface and a low-voltage output interface; the low-voltage input interface at the initial end of the first lithium battery cluster is correspondingly and electrically connected with the low-voltage output interface of the low-voltage electric control module, and the low-voltage output interface at the tail end of the last lithium battery cluster is correspondingly and electrically connected with the low-voltage input interface of the low-voltage electric control module; according to the utility model, a 300V-600V voltage platform can be provided, and compared with the conventional engineering machinery with a low-voltage platform, the battery voltage is higher, the rated energy is high under the condition that the current upper limit is not changed, and the output power is large.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a high-voltage battery pack based on 300-600V. Background Technology

[0002] With the popularization of electrification in construction machinery, more and more high-power construction machinery is trending towards electrification. At present, construction machinery that uses lithium batteries as the power system mostly operates at a low voltage of less than 96V. Due to limitations of cables and connectors, the current limit is 250A, and its power characteristics are generally ≤30kW. Summary of the Invention

[0003] The purpose of this invention is to provide a high-voltage battery pack based on 300-600V.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A high-voltage battery pack based on 300-600V is characterized by comprising a plurality of lithium battery clusters, a junction box, and a low-voltage electronic control module. Each lithium battery cluster is composed of a plurality of lithium battery modules connected in series. Each lithium battery module is provided with a positive battery interface, a negative battery interface, a low-voltage input interface, and a low-voltage output interface. The junction box is provided with a plurality of positive battery interfaces and negative battery interfaces. The positive battery interface at the beginning of each lithium battery cluster is electrically connected to the positive battery interface of the junction box, and the negative battery interface at the end of each lithium battery cluster is electrically connected to the negative battery interface of the junction box. The low-voltage electronic control module is provided with a low-voltage input interface and a low-voltage output interface. The low-voltage input interface at the beginning of the first lithium battery cluster is electrically connected to the low-voltage output interface of the low-voltage electronic control module, and the low-voltage output interface at the end of the last lithium battery cluster is electrically connected to the low-voltage input interface of the low-voltage electronic control module. The control interface of the junction box is electrically connected to the control interface of the low-voltage electronic control module.

[0006] Furthermore, the high-voltage battery pack includes a first lithium battery cluster and a second lithium battery cluster. The first lithium battery cluster is composed of a first lithium battery module and a second lithium battery module connected in series, and the second lithium battery cluster is composed of a third lithium battery module and a fourth lithium battery module connected in series.

[0007] Furthermore, each of the lithium battery modules consists of 90 individual battery cells connected in series and 1 in parallel.

[0008] Furthermore, the low-voltage electronic control module is equipped with a BMS battery system.

[0009] This utility model of lithium battery pack can provide a voltage platform of 300V-600V. Compared with traditional low-voltage platform engineering machinery batteries, this utility model of lithium battery pack has a higher voltage, higher rated energy and greater output power while keeping the upper limit of current unchanged.

[0010] When the current limit is limited to 250A, this utility model improves the voltage platform to support greater input / output power, which can meet the instantaneous high power requirements of large engineering machinery such as excavators and cranes. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the system structure of this utility model.

[0012] Figure label:

[0013] 1. First lithium battery cluster, 2. Second lithium battery cluster, 3. Junction box, 4. Low-voltage electronic control module, 5. BMS battery system.

[0014] 11 First lithium battery module, 12 Second lithium battery module,

[0015] 21 Third lithium battery module, 22 Fourth lithium battery module. Detailed Implementation

[0016] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] This embodiment discloses a high-voltage battery pack based on 300-600V, such as Figure 1 As shown, it includes a first lithium battery cluster 1, a second lithium battery cluster 2, a junction box 3, and a low-voltage electronic control module 4. The control interface of the junction box 3 is electrically connected to the control interface of the low-voltage electronic control module 4. The first lithium battery cluster 1 is composed of a first lithium battery module 11 and a second lithium battery module 12 connected in series. The second lithium battery cluster 2 is composed of a third lithium battery module 21 and a fourth lithium battery module 22 connected in series.

[0018] This embodiment uses a 155kW / 310.64kWh installed capacity, selects high-energy-density lithium iron phosphate batteries, and has a total battery capacity of 310k.64kWh. It uses two lithium battery clusters, each consisting of two 289.8V / 268Ah (77.66kWh) lithium battery modules. Each lithium battery module consists of 90 individual 268Ah cells connected in series and parallel.

[0019] like Figure 1As shown, the first lithium battery module 11, the second lithium battery module 12, the third lithium battery module 21 and the fourth lithium battery module 22 are all provided with a positive battery interface, a negative battery interface, a low-voltage input interface and a low-voltage output interface, and the junction box 3 is provided with a positive battery interface one, a positive battery interface two, a negative battery interface one and a negative battery interface two.

[0020] The positive battery interface of the first lithium battery module 11 is electrically connected to the positive battery interface one of the junction box 3, the positive battery interface of the third lithium battery module 21 is electrically connected to the positive battery interface two of the junction box 3, the negative battery interface of the first lithium battery module 11 is electrically connected to the negative battery interface one of the junction box 3, and the negative battery interface of the third lithium battery module 21 is electrically connected to the negative battery interface two of the junction box 3.

[0021] like Figure 1 As shown, the low-voltage electronic control module 4 includes a BMS battery system 5. The BMS battery system 5 has a liquid-cooled thermal management system, which can significantly improve battery charging and discharging efficiency, and enhance system stability and environmental adaptability. The BMS battery system 5 supports a unified standard communication protocol to ensure that the high-voltage battery pack is compatible with various charging devices. The BMS battery system 5 supports constant power + wake-up function, low static power consumption, dark current ≤1mA, and has built-in insulation monitoring function with a detection error of -30%~0%.

[0022] The low-voltage electronic control module 4 is provided with a low-voltage input interface and a low-voltage output interface. The low-voltage input interface of the first lithium battery module 11 and the low-voltage output interface of the low-voltage electronic control module 4 are electrically connected accordingly. The low-voltage output interface of the fourth lithium battery module 22 and the low-voltage input interface of the low-voltage electronic control module 4 are electrically connected accordingly.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high voltage battery pack based on 300-600V, characterized in that, The high-voltage battery pack comprises a first lithium battery cluster (1) and a second lithium battery cluster (2), the first lithium battery cluster (1) is composed of a first lithium battery module (11) and a second lithium battery module (12) in series, and the second lithium battery cluster (2) is composed of a third lithium battery module (21) and a fourth lithium battery module (22) in series.

2. The high voltage battery pack of claim 1, wherein, Each of the lithium battery modules is composed of single battery cells 90 in series.

3. The high voltage battery pack of claim 1, wherein, The low-voltage control module (4) is provided with a BMS battery system (5).

4. The high voltage battery pack of claim 1, wherein, The high-voltage battery pack comprises a first lithium battery cluster (1) and a second lithium battery cluster (2), the first lithium battery cluster (1) is composed of a first lithium battery module (11) and a second lithium battery module (12) in series, and the second lithium battery cluster (2) is composed of a third lithium battery module (21) and a fourth lithium battery module (22) in series. Each of the lithium battery modules is composed of single battery cells 90 in series. The low-voltage control module (4) is provided with a BMS battery system (5).

Images