High-capacity energy storage battery pack

Abstract

The utility model discloses a large-capacity energy storage battery pack, which comprises a liquid cooling plate and a box cover, an accommodating cavity is formed in the liquid cooling plate and the box cover, a battery module, a circuit component and a fire-fighting assembly are arranged in the accommodating cavity, the circuit component is arranged on one side of the battery module, and a detachable mounting plate is arranged on one side wall, corresponding to the circuit component, of the box cover. A signal connector and an anti-explosion valve are arranged on the mounting plate; the circuit components comprise a fuse group, a slave control BMS and a maintenance switch circuit breaker MSD, the fire-fighting assembly comprises a fire detection tube and a fire-fighting sensor, the fire-fighting sensor is connected with the signal connector through a signal line, and the fire detection tube is laid at the position of a wiring harness explosion-proof hole of the battery module in an S shape and is bound with a wiring harness through a binding belt. The structure is simple and safe, and later maintenance is facilitated; the aluminum extrusion liquid cooling plate adopts two water inlets and one water outlet, and two fuses and one maintenance switch circuit breaker MSD are designed for protection, so that the aluminum extrusion liquid cooling plate can receive external trigger signals to protect the battery pack.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage battery pack applications, specifically relating to a large-capacity energy storage battery pack. Background Technology

[0002] With the rapid development of the new energy industry, the demand for liquid-cooled containers is also growing rapidly, and the development trend of energy storage containers is towards higher power and smaller footprint. As the main component of energy storage containers, the power and specifications of energy storage battery packs are receiving more attention.

[0003] With the introduction of high-capacity batteries, the installed capacity of containerized energy storage systems is developing towards larger capacities. As the power of energy storage battery packs increases, the problem of heat dissipation becomes increasingly prominent. Ineffective heat dissipation not only affects battery lifespan but may also lead to safety accidents. Furthermore, the maintenance of existing high-capacity batteries is inconvenient. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a high-capacity energy storage battery pack.

[0005] The specific technical solution of this utility model is as follows:

[0006] A high-capacity energy storage battery pack includes a liquid cooling plate and a cover, which together form a cavity. The cavity houses battery modules, circuit components, and fire suppression components. The circuit components are located on one side of the battery modules. A removable mounting plate is provided on the side wall of the cover corresponding to the circuit components. A signal connector and an explosion-proof valve are mounted on the removable mounting plate. The circuit components include a fuse group, a slave control system (BMS), and a maintenance circuit breaker (MSD). The fire suppression components include a fire detection tube and a fire sensor. The fire sensor is connected to the signal connector via a signal line and outputs a signal externally through the signal connector. The fire detection tube is laid in an S-shape at the explosion-proof hole of the wiring harness CCS of the battery module and is secured to the wiring harness CCS with cable ties.

[0007] Furthermore, the battery module includes eight modules forming a series circuit, including a first module, a second module, a third module, a fourth module, a fifth module, a sixth module, a seventh module, and an eighth module, which form an S-shaped series circuit according to the first module, the second module, the fourth module, the third module, the fifth module, the sixth module, the eighth module, and the seventh module.

[0008] Furthermore, each module includes 13 314AH cells, which are separated by aerogel and connected in series via a CCS wiring harness.

[0009] Furthermore, the fuse group includes a first fuse and a second fuse. The first fuse is a short-circuit fuse, and the second fuse is a smart fuse. The positive terminal of the third module is connected to one end of the first fuse via a copper busbar, and the other end of the first fuse is connected to one end of the second fuse via a copper busbar. The other end of the second fuse is connected to the maintenance switch circuit breaker (MSD) via a copper busbar.

[0010] Furthermore, the negative terminal of the fifth module is connected to the maintenance switch circuit breaker MSD, the positive terminal is connected to the negative terminal of the sixth module, the positive terminal of the sixth module is connected to the negative terminal of the eighth module, the positive terminal of the eighth module is connected to the negative terminal of the seventh module, and the positive terminal of the seventh module is connected to the external positive terminal connector.

[0011] Furthermore, the wiring harnesses (CCS) of the eight modules are connected to the slave control BMS via signal lines, and the slave control BMS is connected to the external signal connector via signal lines.

[0012] Furthermore, the liquid cooling plate is an aluminum extruded liquid cooling plate, with two water inlets and one water outlet at one end. Both the water inlets and the water outlet are located on one side of the mounting plate, and the water outlet is located between the two water inlets.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] (1) The battery pack structure of this utility model is simple. The explosion-proof valve and the slave control, signal connector and other easily damaged devices are fixed on a mounting plate that is easy to disassemble (for easy maintenance and replacement). The mounting plate is fixed to the cover plate by sealing strip bolts, and the cover plate is fixed to the liquid cooling plate by sealing strip bolts. At the same time, the bracket mounting plate of MSD, positive and negative connectors and fire water nozzle is fixed to the cover plate by sealing strip bolts, etc., thereby forming a sealed space inside the battery pack, so that the battery pack protection level reaches IP67.

[0015] (2) The aluminum extruded liquid cooling plate has two water inlets and one water outlet. This design results in a smaller temperature difference between the cells on the liquid cooling plate and a better temperature uniformity. To protect the battery pack from charging and discharging more safely, two fuses and a maintenance switch circuit breaker (MSD) are designed for protection. One of them is an intelligent fuse that can be triggered by an external trigger signal to activate the high-speed circuit breaker and protect the battery pack.

[0016] (3) There is a fire detection tube inside the battery pack, which is placed at the position of the cell explosion-proof valve. When the cell experiences thermal runaway, the fire detection tube is passively triggered, and the fire extinguishing agent outside the battery pack flows in quickly through the nozzle to extinguish the fire and reduce the safety risk. At the same time, the battery pack is also equipped with a fire sensor (detecting combustible gases such as hydrogen and CO) to actively detect the fire inside the battery pack. In addition, the battery pack is also equipped with an explosion-proof valve. When a fire occurs inside the battery pack, the gas pressure inside the pack increases, the explosion-proof valve is triggered, and the gas pressure inside the battery pack is reduced, thereby reducing the risk of explosion. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model (without the box lid);

[0019] Figure 3 This is a partial schematic diagram of the present invention.

[0020] In the diagram: 1-Liquid cooling plate, 11-Water inlet, 12-Water outlet, 2-Tank cover, 3-Battery module, 31-First module, 32-Second module, 33-Third module, 34-Fourth module, 35-Fifth module, 36-Sixth module, 37-Seventh module, 38-Eighth module, 4-Fuse group, 41-First fuse, 42-Second fuse, 5-Slave control BMS, 6-Fire protection component, 61-Fire detection tube, 62-Fire sensor, 7-Maintenance switch circuit breaker MSD, 8-Mounting plate, 9-Signal connector. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] like Figures 1-3 As shown, a high-capacity energy storage battery pack includes a liquid cooling plate 1 and a cover 2, which together form a housing cavity. The housing cavity houses a battery module 3, circuit components, and a fire protection assembly. The circuit components are located on one side of the battery module 3. A detachable mounting plate 8 is provided on the side wall of the cover 2 corresponding to the circuit components. A signal connector 9 and an explosion-proof valve are provided on the mounting plate 8. The circuit components include a fuse group 4, a slave control BMS 5, a fire protection assembly 6, and a maintenance switch circuit breaker MSD 7. The fire protection assembly 6 includes a fire detection tube 61 and a fire sensor 62. The fire sensor 62 is connected to the signal connector 9 via a signal line. The fire detection tube 61 is laid in an S-shape at the explosion-proof hole of the wiring harness CCS of the battery module 3 and is bound to the wiring harness CCS by a cable tie.

[0023] When a battery cell experiences thermal runaway, the fire detection tube 61 is passively triggered, and the fire extinguishing agent outside the battery pack flows rapidly into the nozzle to extinguish the fire, reducing the safety risk. At the same time, the battery pack is also equipped with a fire sensor 62 (which detects flammable gases such as hydrogen and CO) to actively detect fires inside the battery pack. In addition, the battery pack is also equipped with an explosion-proof valve. When a fire occurs inside the battery pack, the gas pressure inside the pack increases, triggering the explosion-proof valve to reduce the gas pressure inside the battery pack, thereby reducing the risk of explosion.

[0024] Specifically, battery module 3 comprises eight modules forming a series circuit, including module 31, module 32, module 33, module 34, module 35, module 36, module 37, and module 38, arranged in an S-shaped series circuit. The wiring harness CCS of the eight modules is connected to the slave controller BMS5 via signal lines, and the slave controller BMS5 is connected to the external signal connector 9 via signal lines. The modules are connected to each other via positive and negative copper busbars. Each module includes 13 314AH cells, which are separated by aerogel to effectively prevent heat dissipation. The cells are connected in series via the wiring harness CCS. The voltage of each battery cell, as well as the temperature of a portion of the cells, are collected through the acquisition points of the CCS harness. The data is then aggregated into the Cluster Control BMS5 via the signal connection harness for accurate monitoring. Finally, the data is transmitted to the external main control unit via the signal connection lines of the Cluster Control BMS5.

[0025] Fuse group 4 includes a first fuse 41 and a second fuse 42. The first fuse 41 is a short-circuit fuse, and the second fuse 42 is a smart fuse (capable of triggering a high-speed circuit breaker to disconnect upon receiving an external trigger signal, thus protecting the battery pack). The positive terminal of the third module 33 is connected to one end of the first fuse 41 via a copper busbar, and the other end of the first fuse 41 is connected to one end of the second fuse 42 via a copper busbar. The other end of the second fuse 42 is connected to the maintenance switch circuit breaker MSD7 via a copper busbar. The negative terminal of the fifth module 35 is connected to the maintenance switch circuit breaker MSD7 via a copper busbar, and its positive terminal is connected to the negative terminal of the sixth module 36 via a copper busbar. The positive terminal of the sixth module 36 is connected to the negative terminal of the eighth module 38 via a copper busbar, and the positive terminal of the eighth module 38 is connected to the negative terminal of the seventh module 37 via a copper busbar. The positive terminal of the seventh module 37 is connected to the external positive connector via a copper busbar.

[0026] In addition, the liquid cooling plate 1 of this application is an aluminum extruded liquid cooling plate. The aluminum extruded liquid cooling plate has two water inlets 11 and one water outlet 12 at one end. Both water inlets 11 and water outlet 12 are located on one side of the mounting plate, and the water outlet is located between the two water inlets 11. Compared with other liquid cooling plates with one water inlet and one water outlet, the liquid cooling plate 1 designed in this application has a smaller temperature difference between the cells and a better temperature uniformity effect.

[0027] The explosion-proof valve, the slave control BMS5, the signal connector 9, and other easily damaged components are fixed on a mounting plate 8 that is easy to disassemble (for easy maintenance and replacement). This mounting plate 8 is fixed to the cover 2 by sealing strips and bolts. The cover 2 is fixed to the liquid cooling plate 1 by sealing strips and bolts. At the same time, the bracket mounting plate for fixing the maintenance switch circuit breaker MSD7, the positive and negative connectors, and the fire water nozzles is fixed to the cover 2 by sealing strips and bolts, thus forming a sealed space inside the battery pack (i.e., the liquid cooling plate 1 and the cover 2 form a cavity), so that the battery pack protection level reaches IP67.

[0028] The battery pack of this application can reach a maximum capacity of 104.5 kWh, and the internal components can be easily replaced in the energy storage container system. The maintenance and operation are simple. The aluminum extruded liquid cooling plate is equipped with two water inlets 11 and one water outlet 12 to evenly remove the heat from the battery module 3, resulting in good temperature uniformity. The fire detection tube 61 accurately monitors the fire situation inside the battery pack to trigger the fire-fighting equipment to start, which has a fast response speed and high safety.

[0029] 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-capacity energy storage battery pack, comprising a liquid cooling plate (1) and a cover (2), the two forming a receiving cavity, characterized in that, The cavity contains a battery module (3), circuit components, and fire protection components. The circuit components are placed on one side of the battery module (3). The cover (2) is provided with a detachable mounting plate (8) on one side wall of the circuit components. The detachable mounting plate (8) is provided with a signal connector (9) and an explosion-proof valve. The circuit components include a fuse group (4), a slave control BMS (5), and a maintenance switch circuit breaker MSD (7). The fire protection components (6) include a fire detection tube (61) and a fire sensor. The fire sensor is connected to the signal connector (9) through a signal line and outputs a signal to the outside through the signal connector (9). The fire detection tube (61) is laid in an S-shape at the explosion-proof hole of the wiring harness CCS of the battery module (3) and is bound to the wiring harness CCS by a cable tie.

2. The high-capacity energy storage battery pack according to claim 1, characterized in that, The battery module (3) includes eight modules forming a series circuit, including a first module (31), a second module (32), a third module (33), a fourth module (34), a fifth module (35), a sixth module (36), a seventh module (37), and an eighth module (38), which form an S-shaped series circuit according to the first module (31), the second module (32), the fourth module (34), the third module (33), the fifth module (35), the sixth module (36), the eighth module (38), and the seventh module (37).

3. A high-capacity energy storage battery pack according to claim 2, characterized in that, Each module includes 13 314AH cells, which are separated by aerogel and connected in series via a CCS wiring harness.

4. A high-capacity energy storage battery pack according to claim 3, characterized in that, The fuse group (4) includes a first fuse (41) and a second fuse (42). The first fuse (41) is a short-circuit fuse, and the second fuse (42) is a smart fuse. The positive terminal of the third module (33) is connected to one end of the first fuse (41) through a copper busbar. The other end of the first fuse (41) is connected to one end of the second fuse (42) through a copper busbar. The other end of the second fuse (42) is connected to the maintenance switch circuit breaker MSD (7) through a copper busbar.

5. A high-capacity energy storage battery pack according to claim 3, characterized in that, The negative terminal of the fifth module (35) is connected to the maintenance switch circuit breaker MSD (7), and the positive terminal is connected to the negative terminal of the sixth module (36). The positive terminal of the sixth module (36) is connected to the negative terminal of the eighth module (38). The positive terminal of the eighth module (38) is connected to the negative terminal of the seventh module (37). The positive terminal of the seventh module (37) is connected to the external positive terminal connector.

6. A high-capacity energy storage battery pack according to claim 3, characterized in that, The wiring harnesses of the eight modules (CCS) are connected to the slave control BMS (5) via signal lines, and the slave control BMS (5) is connected to the external signal connector (9) via signal lines.

7. A high-capacity energy storage battery pack according to any one of claims 1-6, characterized in that, The liquid cooling plate (1) is an aluminum extruded liquid cooling plate. Two water inlets (11) and one water outlet (12) are provided at one end of the aluminum extruded liquid cooling plate. The water inlets (11) and the water outlet (12) are both located on one side of the mounting plate, and the water outlet (12) is located between the two water inlets (11).

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