A lithium battery pack with high voltage and high power discharge

Abstract

The utility model discloses a high-voltage and high-power discharge lithium battery pack, which belongs to the field of lithium iron phosphate batteries, and comprises: a battery module; a BMU voltage and current acquisition module embedded in the battery module; an RBMS high-voltage box charge and discharge circuit control module; an output switch, wherein the output switch is electrically connected to the battery module, the BMU voltage and current acquisition module, and the RBMS high-voltage box charge and discharge circuit control module; a battery management system unit, the technical solution of which is to use the battery management system unit to perform comprehensive management of the battery pack; a voltage monitoring module, which is used to further monitor the voltage; an AC‑DC module, which is used to convert alternating current into direct current; and a DC‑DC module, which is used to convert and adjust direct current voltage, wherein the BMU voltage and current acquisition module is embedded in the battery module to collect voltage and current information in real time.

Description

Technical Field

[0001] The utility model relates to the field of lithium iron phosphate batteries, and more specifically, to a high-voltage and high-power discharge lithium battery pack. Background Art

[0002] At present, lead-acid batteries are mostly used as backup power sources in data centers and emergency backup power UPS application scenarios. Lead-acid batteries are the earliest and most mature batteries of all batteries. Their positive electrode material is lead dioxide and their negative electrode material is lead. During charging and discharging, the mutual conversion of electrical energy and chemical energy is completed through the redox reaction at the two poles inside the battery. It has the advantages of mature technology, low cost, good safety, and strong large current discharge capability. Therefore, it has been widely used in transportation, energy storage, commercial and industrial uninterruptible power supplies, and portable electronic devices.

[0003] However, the greater the discharge rate of traditional lead-acid batteries, the less available capacity they have, and there is also the problem that they cannot be installed when space is limited.

[0004] Therefore, in order to solve the above problems, a lithium battery pack with high voltage and high power discharge is proposed. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a lithium battery pack with high voltage and high power discharge. The lithium battery pack is protected by a smart electric box. The base is convenient for placing the smart electric box, and there is no need to install the smart electric box. The lifting ring is convenient for the user to lift the smart electric box, thereby preventing the problem of limited space and inability to install. The smart box door and the smart electric box cooperate to protect the lithium battery pack and prevent the smart electric box from falling. The handle of the lithium battery pack is convenient for the user to install and remove the battery cells of the lithium battery pack. The external board is used for the module communication line interface and BMU installation. If the BMU fails, it can be quickly replaced. The upper and lower connecting plates and the left and right connecting plates are convenient for the user to connect the upper, lower, left and right devices, thereby limiting the position of the battery cells.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A high-voltage and high-power discharge lithium battery pack, comprising:

[0008] Battery module;

[0009] A BMU voltage and current acquisition module embedded in the battery module;

[0010] RBMS high voltage box charging and discharging circuit control module;

[0011] Output switches, which are electrically connected to the battery module, the BMU voltage and current acquisition module, and the RBMS high-voltage box charge and discharge circuit control module;

[0012] Battery management system unit;

[0013] Voltage monitoring module;

[0014] An AC-DC module, the AC-DC module is electrically connected to the battery module;

[0015] The DC-DC module is electrically connected to the battery module.

[0016] This solution uses a battery management system unit to comprehensively manage the battery pack; a voltage monitoring module to further monitor the voltage; an AC-DC module to convert AC power into DC power; and a DC-DC module to convert and regulate DC voltage. The BMU voltage and current acquisition module is embedded in the battery module to collect voltage and current information in real time.

[0017] The BMU voltage and current acquisition module embedded in the battery module has the following features:

[0018] Real-time monitoring, continuously monitoring the voltage and current of the battery module, so as to grasp the working status of the battery in time;

[0019] Data collection: Accurately collect relevant data to provide accurate information basis for the battery management system, which is conducive to scientific management and analysis of batteries;

[0020] Safety assurance: by monitoring voltage and current, abnormal conditions such as overvoltage, undervoltage, overcurrent, etc. can be detected in time, thus ensuring the safe operation of the battery module and avoiding potential dangers;

[0021] Performance evaluation helps evaluate the performance of battery modules, such as energy output capacity, internal resistance change, etc., to provide a basis for optimizing battery use and maintenance strategies;

[0022] Charge and discharge control provides necessary data support for the charge and discharge process, and assists in achieving reasonable charge and discharge control to extend battery life and improve usage efficiency.

[0023] Reference Figure 1-Figure 3 As shown, a high-voltage and high-power discharge lithium battery pack includes a smart electric box, a lithium battery pack is fixedly installed inside the smart electric box, the bottom end of the smart electric box is fixedly connected to a base, the top end of the smart electric box is fixedly connected to a plurality of symmetrically distributed lifting rings, and the front end of the smart electric box is hinged with a smart box door, which is compatible with the lithium battery pack.

[0024] The lithium battery pack includes a plurality of battery cells, the plurality of battery cells are connected in series, the plurality of battery cells connected in series are installed inside a smart battery box, and the battery cells are compatible with the smart battery box.

[0025] A panel is fixedly connected to the front end of the battery cell, and the panel is adapted to the battery cell.

[0026] Upper and lower connecting plates are fixedly connected to the upper and lower ends of the battery core and located at the rear end of the panel.

[0027] The left and right ends of the battery core are fixedly connected at the rear end of the panel.

[0028] An external plate is fixedly connected to the front end of the panel, and a plurality of symmetrically distributed handles are fixedly connected to the front end of the panel, and the handles are adapted to the external plate.

[0029] This solution protects the lithium battery pack through a smart electric box. The base is convenient for placing the smart electric box, and there is no need to install the smart electric box. The lifting ring is convenient for users to lift the smart electric box, thereby preventing the problem of limited space and inability to install. The smart box door and the smart electric box cooperate to protect the lithium battery pack and prevent the smart electric box from falling. Among them, the handle of the lithium battery pack is convenient for users to install and remove the battery cells of the lithium battery pack. The external board is used for the module communication line interface and BMU installation. If the BMU fails, it can be quickly replaced. The upper and lower connecting plates and the left and right connecting plates are convenient for users to connect devices with upper, lower, left and right, thereby limiting the position of the battery cells.

[0030] Specific implementation process: First, connect the battery cells, place them in the smart power box, and connect external devices to facilitate power supply. The battery module BMU voltage and current acquisition module + RBMS high-voltage box charge and discharge circuit control module and output switch and battery management system unit + comprehensive management unit SBMS are used together to improve the use effect. It can power medium and large power UPS, and has a parallel function to expand the total power of the power supply battery system and increase the backup time. The use of high-power lithium iron phosphate batteries can effectively increase the energy density of the system, reduce system costs and installation area, and effectively save Cost, making the system more economical. The battery module consists of 20 strings of battery cells, a 64V battery module embedded in the BMU voltage and current acquisition module to form a battery module. The battery cluster voltage can reach up to 1000V, which is suitable for high-voltage UPS systems. It includes voltage acquisition lines, temperature acquisition lines, fan control lines, and communication cascade lines. The communication cascade lines are connected in series with the battery modules to enable the modules to communicate and monitor. The multi-cluster high-voltage module integrated management unit SBMS performs multi-cluster parallel management. It monitors the working status of each battery cluster and has the parallel function to expand the total power of the power supply battery system, increase the backup time and meet greater discharge power requirements.

[0031] In summary, the utility model has the following beneficial effects:

[0032] (1) This solution uses a battery management system unit to comprehensively manage the battery pack; a voltage monitoring module to further monitor the voltage; an AC-DC module to convert AC power into DC power; and a DC-DC module to convert and regulate DC voltage. The BMU voltage and current acquisition module is embedded in the battery module to collect voltage and current information in real time.

[0033] (2) This solution protects the lithium battery pack through a smart electric box. The base facilitates the placement of the smart electric box, and there is no need to install the smart electric box. The lifting ring facilitates the user to lift the smart electric box, thereby preventing the problem of limited space and inability to install. The smart box door and the smart electric box cooperate to protect the lithium battery pack and prevent the smart electric box from falling. The handle of the lithium battery pack facilitates the user to install and remove the battery cells of the lithium battery pack. The external board is used for the module communication line interface and BMU installation. If the BMU fails, it can be quickly replaced. The upper and lower connecting plates and the left and right connecting plates facilitate the user to connect the upper, lower, left and right devices, thereby limiting the position of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the overall three-dimensional structure of this embodiment;

[0035] Figure 2 2 is a schematic diagram of the overall structure of the embodiment;

[0036] Figure 3 is a schematic diagram of a structure of a lithium battery pack in this embodiment;

[0037] Figure 4 is a diagram of a lithium battery system in this embodiment;

[0038] Figure 5 is a partial enlarged view of the lithium battery system in this embodiment;

[0039] Figure 6 is a partial enlarged view of the lithium battery system in this embodiment;

[0040] Figure 7 It is a partial enlarged view of the lithium battery system in this embodiment.

[0041] In the figure, 1. smart electric box; 2. base; 3. lifting ring; 4. lithium battery pack; 5. smart box door; 401. battery cell; 402. panel; 403. upper and lower connecting plates; 404. left and right connecting plates; 406. external connecting plate; 407. handle. DETAILED DESCRIPTION

[0042] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0043] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0044] Reference Figure 4-Figure 7 As shown, a high-voltage and high-power discharge lithium battery pack in a preferred embodiment of the utility model includes:

[0045] Battery module;

[0046] A BMU voltage and current acquisition module embedded in the battery module;

[0047] RBMS high voltage box charging and discharging circuit control module;

[0048] Output switches, which are electrically connected to the battery module, the BMU voltage and current acquisition module, and the RBMS high-voltage box charge and discharge circuit control module;

[0049] Battery management system unit;

[0050] Voltage monitoring module;

[0051] An AC-DC module, the AC-DC module is electrically connected to the battery module;

[0052] The DC-DC module is electrically connected to the battery module.

[0053] In this solution, the battery management system unit is used to comprehensively manage the battery pack; the voltage monitoring module is used to further monitor the voltage; the AC-DC module is used to convert AC power into DC power; the DC-DC module is used to convert and adjust DC voltage, wherein the BMU voltage and current acquisition module is embedded in the battery module to collect voltage and current information in real time;

[0054] The BMU voltage and current acquisition module embedded in the battery module has the following features:

[0055] Real-time monitoring, continuously monitoring the voltage and current of the battery module, so as to grasp the working status of the battery in time;

[0056] Data collection: Accurately collect relevant data to provide accurate information basis for the battery management system, which is conducive to scientific management and analysis of batteries;

[0057] Safety assurance: by monitoring voltage and current, abnormal conditions such as overvoltage, undervoltage, overcurrent, etc. can be detected in time, thus ensuring the safe operation of the battery module and avoiding potential dangers;

[0058] Performance evaluation helps evaluate the performance of battery modules, such as energy output capacity, internal resistance change, etc., to provide a basis for optimizing battery use and maintenance strategies;

[0059] Charge and discharge control provides necessary data support for the charge and discharge process, and assists in achieving reasonable charge and discharge control to extend battery life and improve efficiency.

[0060] Reference Figure 1-Figure 3 As shown, a high-voltage and high-power discharge lithium battery pack includes a smart electric box 1, a lithium battery pack 4 is fixedly installed inside the smart electric box 1, the bottom end of the smart electric box 1 is fixedly connected to a base 2, the top end of the smart electric box 1 is fixedly connected to a plurality of symmetrically distributed lifting rings 3, and the front end of the smart electric box 1 is hinged with a smart box door 5, and the smart box door 5 is adapted to the lithium battery pack 4.

[0061] The lithium battery pack 4 includes a plurality of battery cells 401 , and the plurality of battery cells 401 are connected in series. The plurality of battery cells 401 connected in series are installed inside the smart power box 1 , and the battery cells 401 are compatible with the smart power box 1 .

[0062] A panel 402 is fixedly connected to the front end of the battery cell 401 , and the panel 402 is adapted to the battery cell 401 .

[0063] Upper and lower connecting plates 403 are fixedly connected to the upper and lower ends of the battery cell 401 and located at the rear end of the panel 402 .

[0064] The left and right ends of the battery cell 401 are fixedly connected at the rear end of the panel 402 .

[0065] An external plate 406 is fixedly connected to the front end of the panel 402 . A plurality of symmetrically distributed handles 407 are fixedly connected to the front end of the panel 402 . The handles 407 are matched with the external plate 406 .

[0066] In this solution, the smart electric box 1 protects the lithium battery pack 4. The base 2 is convenient for placing the smart electric box 1, and there is no need to install the smart electric box 1. The lifting ring 3 is convenient for the user to lift the smart electric box 1, thereby preventing the problem of limited space and inability to install. The smart box door 5 cooperates with the smart electric box 1 to protect the lithium battery pack 4 and prevent the smart electric box 1 from falling. Among them, the handle 407 of the lithium battery pack 4 is convenient for the user to install and remove the battery cell 401 of the lithium battery pack 4. The external board 406 is used for the module communication line interface and BMU installation. If the BMU fails, it can be quickly replaced. The upper and lower connecting plates 403 and the left and right connecting plates 404 are convenient for the user to connect the upper, lower, left and right devices, thereby limiting the position of the battery cell 401.

[0067] Specific implementation process: First, connect the battery cell 401, place it in the intelligent power box 1, and connect external devices to facilitate power supply. The battery module BMU voltage and current acquisition module + RBMS high-voltage box charge and discharge circuit control module and output switch and battery management system unit + comprehensive management unit SBMS are used together to improve the use effect. It can power medium and large power UPS, and has a parallel function to expand the total power of the power supply battery system and increase the backup time. The use of high-power lithium iron phosphate batteries can effectively increase the energy density of the system, reduce system costs and installation area, and can effectively Save costs and make the system more economical. The battery module consists of 20 strings of battery cells, and the 64V battery module is embedded in the BMU voltage and current acquisition module to form a battery module. The battery cluster voltage can reach up to 1000V, which is suitable for high-voltage UPS systems. It contains voltage acquisition lines, temperature acquisition lines, fan control lines, and communication cascade lines. The communication cascade lines are connected in series with the battery modules to enable the modules to perform communication monitoring. The multi-cluster high-voltage module integrated management unit SBMS performs multi-cluster parallel management. Monitor the working status of each battery cluster, and have the parallel function to expand the total power of the power supply battery system, increase the backup time and greater discharge power requirements.

[0068] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high voltage and high power discharge lithium battery pack, characterized in that: include: Battery module; A BMU voltage and current acquisition module embedded in the battery module; RBMS high voltage box charging and discharging circuit control module; Output switches, which are electrically connected to the battery module, the BMU voltage and current acquisition module, and the RBMS high-voltage box charge and discharge circuit control module; Battery management system unit; Voltage monitoring module; An AC-DC module, the AC-DC module is electrically connected to the battery module; The DC-DC module is electrically connected to the battery module.

2. A high voltage and high power discharge lithium battery pack according to claim 1, characterized in that: It also comprises an intelligent electric box (1), wherein a lithium battery pack (4) is fixedly installed inside the intelligent electric box (1), a base (2) is fixedly connected to the bottom end of the intelligent electric box (1), a plurality of symmetrically distributed lifting rings (3) are fixedly connected to the top end of the intelligent electric box (1), and an intelligent box door (5) is hinged at the front end of the intelligent electric box (1), and the intelligent box door (5) is compatible with the lithium battery pack (4); The lithium battery pack (4) comprises a plurality of battery cells (401), wherein the plurality of battery cells (401) are connected in series, and the plurality of battery cells (401) connected in series are installed inside the smart power box (1), and the battery cells (401) are compatible with the smart power box (1).

3. A high voltage and high power discharge lithium battery pack according to claim 2, characterized in that: A panel (402) is fixedly connected to the front end of the battery cell (401), and the panel (402) is compatible with the battery cell (401).

4. A high voltage and high power discharge lithium battery pack according to claim 3, characterized in that: Upper and lower connecting plates (403) are fixedly connected at the upper and lower ends of the battery core (401) and at the rear end of the panel (402).

5. A high voltage and high power discharge lithium battery pack according to claim 4, characterized in that: Left and right connecting plates (404) are fixedly connected to the left and right ends of the battery core (401) and located at the rear end of the panel (402).

6. A high voltage and high power discharge lithium battery pack according to claim 5, characterized in that: The front end of the panel (402) is fixedly connected to an external plate (406), and the front end of the panel (402) is fixedly connected to a plurality of symmetrically distributed handles (407), and the handles (407) are adapted to the external plate (406).

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