Lithium iron phosphate soft package power lithium ion battery pack and battery replacement method

A lithium-ion battery pack and lithium iron phosphate technology, which is applied to battery pack components, secondary battery charging/discharging, secondary batteries, etc., can solve problems such as reducing the number of times of use of soft-pack lithium batteries and potential safety hazards, and achieve weight reduction. Lightweight, anti-loss, small temperature rise effect

Pending Publication Date: 2020-09-08

华富(江苏)锂电新技术有限公司

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AI-Extracted Technical Summary

Problems solved by technology

But at the same time, with the frequent charging and discharging of the soft-pack power lithium-ion battery, or the occurrence of adverse conditions such as overcharge, ov...

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Method used

Epoxy resin plate 2 is laid around the lithium battery pack and between the upper and lower sides and the cabinet, followed by upper and lower epoxy resin plates 29, front and rear epoxy resin plates 210, left and right rings Epoxy resin plate 211 , the epoxy resin plate 2 on one side of the assembly plate 7 is located above the assembly plate 7 and below the box cover 5 . Two circular through holes are arranged at the top position of the epoxy resin board 2 above, and the guard coil 8 is installed in the circular through holes to protect the wiring harness.

Fig. 1 is an exploded view of the present invention, as shown in Fig. 1, the present invention comprises chassis, lithium battery pack, battery management system BMS6, wireless transmission module 17 and GPS module 16, antenna 3, socket interface 4. The chassis includes a box body 13 and a box cover 5, the box cover 5 is provided with two rectangular skylights, the epoxy resin plate 2 (black) blocks and seals the rectangular skylights, and the antenna 3 is divided into a GPS antenna and a GSM antenna, as shown in Figure 2 As shown, it is used for positioning and receiving and sending wireless transmission signals. The GPS antenna and the GSM antenna are respectively pasted on the back side of the epoxy resin board 2 (black) (the side facin...

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Abstract

The invention relates to a lithium iron phosphate soft package power lithium ion battery pack and a battery replacement method. The lithium ion battery pack comprises a case, a lithium battery pack and an antenna; an assembling plate is arranged on the assembling side of the lithium battery pack; the lithium battery pack comprises a plurality of lithium iron phosphate power soft package lithium-ion battery cells which are attached in parallel; a tab of the lithium iron phosphate soft package lithium ion battery cell extends and penetrates through the assembly plate; a battery management systemBMS is arranged on the outer side of the assembly plate, the battery management system (BMS) is connected with the tabs in series, the battery management system BMS is electrically connected with thewireless transmission module and the GPS module, and the antenna is electrically connected with the wireless transmission module and the GPS module integration module. The battery replacement methodcomprises the steps of charging, battery replacing and discharging. The lithium iron phosphate soft package power lithium ion battery pack and the battery replacement method have the characteristics of high cycle index and high charging efficiency, and also has the advantages of excellent high-rate performance, small temperature rise, strong power and higher safety performance; real-time protection on charging and discharging of the lithium battery is realized; and the positions of the vehicle and the battery can be monitored in real time.

Application Domain

Cells structural combinationSecondary cells charging/discharging +1

Technology Topic

Automotive engineeringCharge and discharge +9

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Examples

Experimental program(1)

Example Embodiment

[0031] The present invention will now be described in further detail with reference to the drawings. These drawings are all simplified schematic diagrams, which merely illustrate the basic structure of the present invention in a schematic manner, so they only show the structures related to the present invention.

[0032] figure 1 Is an exploded view of the present invention, such as figure 1 As shown, the present invention includes a case, a lithium battery pack, a battery management system BMS6, a wireless transmission module 17 and a GPS module 16, an antenna 3, and a socket interface 4. The case includes a case body 13 and a case cover 5. The case cover 5 is provided with two rectangular skylights. The epoxy resin board 2 (black) blocks the sealed rectangular skylight. The antenna 3 is divided into a GPS antenna and a GSM antenna, such as figure 2 As shown, it is used for receiving and sending out positioning and wireless transmission signals. The GPS antenna and the GSM antenna are respectively pasted on the back of the epoxy resin plate 2 (black) of the box cover 5 that blocks the sealed rectangular sunroof (the side facing the inside of the box) to avoid metal interference and make the antenna signal more stable. The battery management system BMS6 is fixed on the side of the case cover 5 facing the inside of the case. The battery management system BMS6 is fixed on the fixed stud on the side of the case cover 5 facing the inside of the case. Outside the cover 5, the other end is located on the side of the box cover 5 facing the inside of the case, and is connected to the battery management system BMS6, and the battery management system BMS6 is connected to the lithium battery pack.

[0033] The battery management system BMS6 is electrically connected to the wireless transmission module 17 and the GPS module 16, the wireless transmission and GPS integration module is electrically connected to a SIM card slot, the antenna 3 is electrically connected to the wireless transmission and GPS integration module, the wireless transmission module 17 and The GPS integrated module is electrically connected to the battery management system BMS6 to realize the battery management system BMS6 to supply power to the wireless transmission and GPS integrated module, and at the same time transmit battery information to the module.

[0034] The lithium battery pack is arranged in the case, and several lithium iron phosphate power soft-packed lithium electronic cells 12 are attached side by side. The lithium iron phosphate power soft-packed lithium electronic cells 12 are connected to the battery management system BMS6, The lithium iron phosphate power soft-packed lithium electronic cell 12 extends vertically upward from its top edge and passes through the assembly board 7, and the battery management system BMS6 is connected to the outermost lithium iron phosphate soft-packed lithium ion cell, The battery management system BMS6 is electrically connected to the wireless transmission module 17 and the GPS module 16. The wireless transmission and GPS integration module is electrically connected to a SIM card slot, and the IoT SIM card 15 is inserted into the SIM card slot to enable network positioning. The antenna 3 is electrically connected to the wireless transmission and GPS integrated module, and the antenna 3 is pasted on the epoxy resin board 2 of the box cover 5 facing the inside of the box.

[0035] Epoxy plates 2 are laid on the periphery of the lithium battery pack and between the upper and lower sides and the chassis, followed by epoxy resin plates 29 on the upper and lower sides, epoxy resin plates 210 on the front and back, and epoxy resin plates on the left and right. 211, the epoxy resin board 2 on one side of the assembly board 7 is located above the assembly board 7 and below the box cover 5. Two circular through holes are provided on the top of the epoxy resin board 2 above, and the protective coil 8 is installed in the circular through holes to protect the wiring harness.

[0036] The box body 13 is provided with a rectangular groove 14 on the front and back. The rectangular groove 14 is used for pasting products and operation QR codes. The box body 13 and the box cover 5 are connected and fixed by self-tapping screws. The box cover 5 is provided with Handle 1.

[0037] The assembly board 7 is a plate-like structure, which is made of PCB material, and its surface is coated with a copper solder layer; the assembly board 7 is provided with a plurality of lug holes, and the lugs pass through the lug holes and are bent and welded to On the copper solder layer. The connection between the tabs is in series, so that the power soft-packed lithium ion batteries form a series combination.

[0038] The box cover 5 is provided with a through hole, one end of the socket interface 4 protrudes from the surface of the box cover 5, and the other end extends into the through hole to connect to the battery management system BMS6. The socket interface 4 selects the 2+6 power socket interface 4, which is connected in series with the battery management system BMS6. The 2+6 power socket interface 4 is easy to plug and unplug, which facilitates the replacement of the lithium battery pack, improves the efficiency of the rider's battery replacement, saves time, and reserves the auxiliary contact for communication to facilitate the interface to communicate with the external charging cabinet.

[0039] The specification name of the battery management system BMS6 is EB6030-20A20S-4G. The battery management system BMS6 can provide protection and recovery functions for battery packs such as overvoltage, undervoltage, overcurrent, high temperature, low temperature, and short circuit. Realize accurate SOC measurement during charging and discharging, SOH health status statistics. Achieve voltage balance during charging. Through the host computer software human-computer interaction, display and set the voltage, current, temperature and other alarm protection parameters, store and display the real-time data and historical data of the battery's operating status. There are multiple sleep and wake-up methods. It communicates with the switch cabinet or host computer through RS485, performs parameter configuration and data monitoring through the host computer software, and communicates and manages with the remote platform through the GPRS/GPS module and wireless transmission module 17.

[0040] An epoxy resin board 2 is pasted on the back of the battery management system BMS6, and it is fixed to the fixing stud on the back of the box cover 5 with nylon screws. Epoxy resin board 2. Nylon screws provide insulation protection.

[0041] The process of the lithium-ion battery pack of this patent to realize the power exchange is:

[0042] Step 1: Charging: Place the lithium-ion battery pack in the charging cabinet, plug the 2+6 power plug of the charging cabinet into the 2+6 socket interface of the lithium-ion battery pack, and establish communication between the charging cabinet and the battery management system BMS to charge The cabinet outputs voltage and current to charge the battery. If communication cannot be established, it will not be charged. The charging cabinet can obtain the battery number and display the battery number on the display of the charging cabinet. Information such as power, current, voltage and remaining full time will be displayed at the same time. , The real-time battery data will be uploaded to the background monitoring platform through the wireless transmission module; the lithium-ion battery pack is in the charging cabinet, the door indicator light will be red when charging, the indicator light will flash when it is faulty, and the indicator light will turn green when the battery power is higher than 80% , Prompting the user to replace the battery;

[0043] Step 2: Replacing the battery: After scanning the code of the existing lithium-ion battery pack, put it into the charging cabinet, and then scan the code again to take out the new lithium-ion battery pack that is full of points in the charging cabinet;

[0044] Step 3: Discharge: Put the lithium-ion battery pack into the battery slot of the electric vehicle, plug the 2+6 power plug into the 2+6 socket interface of the lithium-ion battery pack, and the lithium-ion battery pack data is through the battery management system BMS The wireless transmission module in uploads real-time battery data and positioning information to the background monitoring platform.

[0045] Realize background monitoring of data to prevent loss of lithium-ion battery packs.

[0046] Taking the above-mentioned ideal embodiment according to the present invention as enlightenment, through the above-mentioned description content, relevant workers can make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the content of the description, and its technical scope must be determined according to the scope of the claims.

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Description & Claims & Application Information

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Lithium iron phosphate soft package power lithium ion battery pack and battery replacement method

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

PUM

Description & Claims & Application Information

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