阅读说明：本技术 一种用于共享单车的三元锂电池组 (Ternary lithium battery pack for sharing bicycle ) 是由 张继强 都伟云 项卫胜 骆峻 施寅 于 2021-07-16 设计创作，主要内容包括：本发明公开了一种用于共享单车的三元锂电池组,其特征是,包括外壳、设置在外壳上的充放电接口和设置在外壳内部的电池包,所述电池包包括内胆、设置在内胆内侧的电芯模组和设置在电芯模组一侧面上的主控板,所述主控板输入端与电芯模组输出端连接,所述主控板的输出端与充放电接口连接。锂电池组采用外壳与内胆里外双层的防护结构提高锂电池组的防护能力。支架支撑电芯单体交错紧密排列,提高锂电池空间利用率的同时,保持良好的散热,同时支架骨架处呈三角支撑,起到更好的抗震支撑效果。主控板采用集成式,通过485通讯对锂电池进行管理,实现对锂电池的智能充放电控制,提高电池使用寿命,使电池多次充放电后能保持稳定的电池容量。(The invention discloses a ternary lithium battery pack for sharing a bicycle, which is characterized by comprising a shell, a charge-discharge interface arranged on the shell and a battery pack arranged inside the shell, wherein the battery pack comprises an inner container, a battery cell module arranged on the inner side of the inner container and a main control board arranged on one side surface of the battery cell module, the input end of the main control board is connected with the output end of the battery cell module, and the output end of the main control board is connected with the charge-discharge interface. The lithium battery pack adopts a double-layer protection structure with an outer shell and an inner container, so that the protection capability of the lithium battery pack is improved. The support supports crisscross inseparable range of electric core monomer, when improving lithium cell space utilization, keeps good heat dissipation, and support skeleton department is the triangular supports simultaneously, plays better antidetonation support effect. The main control board adopts an integrated form, manages the lithium battery through 485 communication, realizes intelligent charging and discharging control of the lithium battery, prolongs the service life of the battery, and enables the battery to keep stable battery capacity after the battery is charged and discharged for many times.)

1. The utility model provides a ternary lithium cell group for sharing bicycle, characterized by, includes the shell, sets up the charge-discharge interface on the shell and sets up the inside battery package in the shell, the battery package includes inner bag, sets up at the inboard electric core module of inner bag and sets up the main control board on electric core module side, the main control board input is connected with electric core module output, the output and the charge-discharge interface connection of main control board.

2. The ternary lithium battery pack for the shared bicycle of claim 1, wherein the main control board comprises an information acquisition module, a protection control module, an output module and a communication module, the information acquisition module: the voltage, the current and the temperature of the battery cell module are collected in real time, and the collected real-time data are fed back to the protection control module;

a protection control module: analyzing the real-time data, and performing control operation when the real-time data exceeds a preset threshold; estimating the remaining battery capacity and the health state of the battery according to the real-time data;

a communication module: the device comprises a power isolation module, a discharge signal module and a 485 communication module.

3. The ternary lithium battery pack for the shared bicycle of claim 2, wherein the battery cell module comprises a battery cell pack, a bracket and serial and parallel nickel sheets; the support is mirror symmetry setting at electric core group two poles of the earth terminal surface, be equipped with a plurality of electric core draw-in grooves on the support, electric core draw-in groove runs through along support thickness direction, the setting of series-parallel connection nickel piece is connected with electric core two poles of the earth spot welding through the battery draw-in groove in the support outside.

4. The ternary lithium battery pack for the shared bicycle according to claim 3, wherein the series-parallel nickel sheets are formed by electrically welding a plurality of battery cells in parallel to form a battery cell, and the adjacent battery cells are formed into a battery cell pack by connecting the series-parallel nickel sheets in series.

5. The ternary lithium battery pack for the sharing bicycle of claim 4, wherein the battery cell module is provided with a plurality of positioning slots on the support at two opposite end surfaces, the inner container is provided with a plurality of positioning pillars inside, and the battery cell module and the inner container are installed in a matching manner through the positioning pillars and the slots.

6. The ternary lithium battery pack for the sharing of the bicycle as claimed in claim 5, wherein the main control board is provided with mortises at two sides, the bracket is provided with tenons at one end, and the main control board is fixed with the mortises and the tenons in a mortise-tenon manner.

7. The ternary lithium battery pack for the shared bicycle according to claims 3-6, wherein the plurality of cells in the battery pack are staggered and closely arranged.

Technical Field

The invention relates to the technical field of battery packs, in particular to a ternary lithium battery pack for sharing a bicycle.

Background

The shared bicycle refers to that an enterprise provides bicycle and bicycle sharing service in a campus, a subway station, a bus station, a residential area, a commercial area, a public service area and the like, and is a time-sharing lease mode, the shared bicycle is novel sharing economy, and as long as 2017, 9, 7 days, the shared bicycle enterprise has wide and deep north in one-line cities of competitive places and two-line cities such as Wuhan, Hangzhou, Fuzhou, Zhengzhou, Nanjing and the like share 12 cities.

For example, a 36V battery pack with stable structure and reliable use disclosed in chinese patent literature, which is disclosed in CN104466055, includes a left bracket, a right bracket, a connector fixing frame, a metal contact, a battery, a protection circuit board, bracket screw posts and connecting nickel sheets, wherein the left bracket and the right bracket are connected through a pair of bracket screw posts, the battery is installed between two corresponding battery installation holes, the protection circuit board is clamped in an L-shaped spacing post, the connector fixing frame is fixedly installed on the protection circuit board, and the outer side of the left bracket has 2 point nickel sheet installation grooves and 4 oblique nickel sheet installation grooves. However, the battery pack structure in the scheme has poor sealing performance, and the problem that the battery capacity is influenced by the reduction of the service life easily under the influence of the external use environment of the shared bicycle.

Disclosure of Invention

The invention provides a ternary lithium battery pack for a shared bicycle, which has the advantages of high protection, long service life and stable battery capacity and is used for overcoming the problems that the protection of a lithium battery of the shared bicycle in the prior art is low, and the stability and the service life of the battery capacity are easily influenced in an outdoor use environment.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a ternary lithium cell group for sharing bicycle, characterized by, includes the shell, sets up the charge-discharge interface on the shell and sets up the inside battery package in the shell, the battery package includes inner bag, sets up at the inboard electric core module of inner bag and sets up the main control board on electric core module side, the main control board input is connected with electric core module output, the output and the charge-discharge interface connection of main control board. Be equipped with the wiring mouth on the inner bag, the output lead-out wire and the communication module lead-out wire of main control board pass the inner bag through the wiring mouth and are connected respectively with the inboard PIN foot of charge-discharge interface, and lithium cell group realizes the intelligent charge-discharge management to lithium cell group system through the main control board, and lithium cell group adopts double-deck protective structure in shell and the inner bag to improve the protective capacities of lithium cell group.

Preferably, the main control board comprises an information acquisition module, a protection control module, an output end and a communication module, wherein the information acquisition module: the voltage, the current and the temperature of the battery cell module are collected in real time, and the collected real-time data are fed back to the protection control module;

a protection control module: analyzing the real-time data, and performing control operation when the real-time data exceeds a preset threshold; estimating the remaining battery capacity and the health state of the battery according to the real-time data;

a communication module: the device comprises a power isolation module, a discharge signal module and a 485 communication module.

The information acquisition module comprises a current detection unit, a cell voltage acquisition unit and a cell temperature acquisition unit, one end of the information acquisition module is connected with the anode and the cathode of the battery pack, the other end of the information acquisition module is connected with the protection control module, the protection control module comprises a front end control chip and a singlechip, and a charging MOS and a discharging MOS connected between the negative electrode of the charging and discharging interface and the negative electrode of the cell group, the front-end control chip and the singlechip are in data interaction by adopting an I2c signal, the front-end control chip controls the action of a charging MOS and/or a discharging MOS through MOS drive, the discharge signal module is connected with the singlechip, the 485 communication module is connected with the singlechip through the power isolation module, still includes the LDO module, and LDO module input is connected with electric core group output, and the output and the singlechip of LDO are connected, realize the intelligent charge-discharge management to lithium battery pack system.

Preferably, the battery cell module comprises a battery cell group, a bracket and serial and parallel nickel sheets; the support is mirror symmetry setting at electric core group two poles of the earth terminal surface, be equipped with a plurality of electric core draw-in grooves on the support, electric core draw-in groove runs through along support thickness direction, the setting of series-parallel connection nickel piece is connected with electric core two poles of the earth spot welding through the battery draw-in groove in the support outside. The battery pack can provide required voltage output, the support plays a supporting role for the battery cell module, certain intervals are kept between the battery cells in orderly arrangement, the isolation state between the single battery cells is kept, and the effect of uniform heat dissipation is achieved.

Preferably, the series-parallel connection nickel sheets connect a plurality of battery cores in parallel into a battery core group through spot welding, and the adjacent battery cores are connected in series through the series-parallel connection nickel sheets to form the battery core group. The series-parallel connection nickel sheet comprises a plurality of nickel sheet monomers, wherein one end of each nickel sheet monomer is provided with a buckle, the clamping edge of each buckle is perpendicular to the corresponding nickel sheet monomer, and when the nickel sheet monomers are installed, the buckles are attached to the end faces of the supports, the nickel sheets are corrected to be parallel to the end faces of the battery cores, and reliable series connection and/or parallel connection between the battery cores of the monomers are guaranteed.

Preferably, a plurality of positioning clamping grooves are formed in the supports of the two opposite end faces of the battery cell module, a plurality of positioning pillars are arranged in the inner container, and the battery cell module and the inner container are installed in a matched mode through the positioning pillars and the clamping grooves. The draw-in groove and the location pillar tight fit installation of multiple spot position improve the accuracy of electric core module position location in the inner bag, and the stability of battery package installation is high, the antidetonation effect of lithium cell to a certain extent.

Preferably, the two sides of the main control board are provided with mortises, one end face of the support is provided with tenons, and the main control board is fixed with the mortises through tenon-and-mortise joints. The mortise runs through along main control board thickness direction, and the main control board below is arranged in to the support terminal surface during installation, and the mortise of main control board is relative to the tenon on the support terminal surface, pushes down the main control board along the vertical direction, makes the tenon arrange the mortise in, then transversely promotes the main control board, and the tenon blocks the mortise, can fix the main control board, simple to operate need not the screw fixation.

Preferably, a plurality of the electric cores in the electric core group are staggered and closely arranged with each other. Electric core draw-in groove parallel distribution and closely arrange on the support arranges, adjacent electric core draw-in groove staggered arrangement in adjacent two rows, though the residual area except each electric core draw-in groove is few on the support of the same area that makes, the bigger space of utilizing the lithium cell guarantees again simultaneously to keep apart each other between monomer electricity core and the electric core, keeps good heat dissipation, and the skeleton department of support is the triangular supports, plays better antidetonation supporting effect.

Therefore, the invention has the following beneficial effects: (1) the lithium battery pack adopts a double-layer protection structure with an outer shell and an inner container, so that the protection capability of the lithium battery pack is improved. (2) The support supports crisscross inseparable range of electric core monomer, when improving lithium cell space utilization, keeps good heat dissipation, and support skeleton department is the triangular supports simultaneously, plays better antidetonation support effect. (3) The main control board adopts an integrated form, manages the lithium battery through 485 communication, realizes intelligent charging and discharging control of the lithium battery, prolongs the service life of the battery, and enables the battery to keep stable battery capacity after the battery is charged and discharged for many times.

Drawings

Fig. 1 is a schematic structural diagram of a shared-bicycle ternary lithium battery according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a shared-bicycle ternary lithium battery in accordance with an embodiment of the present invention.

Fig. 3 is an exploded view of a cell module of a shared-vehicle ternary lithium battery according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a cell module and an inner container of a shared-use ternary lithium battery according to an embodiment of the present invention.

Fig. 5 is a block diagram of a main control board structure of a shared-bicycle ternary lithium battery according to an embodiment of the present invention.

In the figure: 1. the battery comprises a shell 2, a charging and discharging interface 3, a liner 31, a battery cell module 32, a main control board 4, a battery cell 41, a support 42, a series-parallel connection nickel sheet 43, a battery cell clamping groove 5, a positioning clamping groove 51, a positioning support 6, a mortise 61 and a tenon.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.

Example (b):

as shown in fig. 1-5, a ternary lithium battery pack for sharing a bicycle comprises a housing 1 and a battery pack arranged inside the housing 1, wherein the battery pack comprises a liner 33 and a battery cell 4 module 31 arranged in the liner 33, a plurality of positioning clamping grooves 5 are arranged on supports 41 of two opposite end faces, a plurality of positioning pillars are arranged inside the liner 33, and the battery cell 4 module 31 and the liner 33 are installed in a matched manner through the positioning pillars and the clamping grooves. The draw-in groove and the location pillar tight fit installation of multiple spot position improve the accuracy of electric core 4 module 31 place location in inner bag 33, and the stability of battery package installation is high, the antidetonation effect of lithium cell to a certain extent.

Battery 4 module 31 is by 4 groups of electric core, and main control board 32, support 41 and series-parallel connection nickel piece 42 are constituteed, and support 41 is mirror symmetry setting at 4 two pole terminal surfaces of organizing of electric core, 60 electric core draw-in grooves 43 on the support 41, electric core draw-in groove 43 runs through along support 41 thickness direction, and electric core draw-in groove 43 parallel distribution and closely arrange and arrange, adjacent electric core draw-in groove 43 staggered arrangement is arranged to adjacent two, and the same area's that makes support 41 go up except that each electric core draw-in groove 43 remaining area is few, the bigger space that utilizes the lithium cell, guarantee simultaneously again to keep apart each other between monomer electric core 4 and the electric core 4, keep good heat dissipation, and the skeleton department of support 41 is the triangular supports, plays better antidetonation supporting effect.

Series-parallel connection nickel sheets 42 are arranged outside the support 41 and are connected with two poles of the battery cell 4 through battery clamping grooves in a spot welding mode, the series-parallel connection nickel sheets 42 are provided with 11 nickel sheet monomers, the series-parallel connection nickel sheets 42 connect a plurality of battery cells 4 in parallel through spot welding to form a battery cell 4, and adjacent battery cells 4 are connected in series through the series connection of the series-parallel connection nickel sheets to form a battery cell 4 group with 6-10 strings. Every nickel piece monomer one end is equipped with the buckle, the card limit of buckle is perpendicular with the nickel piece monomer, during the installation of nickel piece monomer, buckle and 41 terminal surfaces laminating of support, it is parallel with the terminal surface of electric core 4 to guarantee reliable series connection and/or parallelly connected between monomer electricity core 4 and the electric core 4.

Be provided with main control board 32 on electric core 4 module 31 side, main control board 32 is rectangle, and main control board 32 both sides are equipped with tongue-and-groove 6, and tongue-and-groove 6 runs through along main control board 32 thickness direction, be equipped with tenon 61 on the 41 terminal surface of support, main control board 32 with between fixed through tongue-and-groove 6 and tenon 61 tenon fourth of the twelve earthly branches. The main control board 32 below is arranged in to support 41 terminal surface during installation, and the tongue-and-groove 6 of main control board 32 is relative to tenon 61 on the support 41 terminal surface, pushes down main control board 32 along the vertical direction, makes tenon 61 arrange in tongue-and-groove 6, then transversely promotes main control board 32, and tenon 61 blocks tongue-and-groove 6, can fix main control board 32, simple to operate need not the screw fixation.

The main control board 32 comprises an information acquisition module, a protection control module, an output end and a communication module;

the information acquisition module comprises a current detection unit, a battery cell 4 voltage acquisition unit and a battery cell 4 temperature acquisition unit, one end of the information acquisition module is connected with the positive electrode and the negative electrode of the battery pack, and the other end of the information acquisition module is connected with the protection control module; the protection control module comprises a front-end control chip, an LDO (low dropout regulator) module, a single chip microcomputer, and a charging MOS (metal oxide semiconductor) and a discharging MOS (metal oxide semiconductor) which are connected between the negative electrode of the charging and discharging interface 2 and the negative electrode of the battery cell 4 group, wherein the front-end control chip and the single chip microcomputer carry out data interaction by adopting an I2c signal, the front-end control chip drives and controls the charging MOS and/or the discharging MOS to act through the MOS, and the discharging signal module is connected with the single chip microcomputer; communication module adopts the 485 communications, and communication module passes through the power and keeps apart the module and is connected with the singlechip, and LDO module input is connected with 4 group's of electric core outputs, and the output and the singlechip of LDO are connected, realize the intelligent charge-discharge management to lithium battery system. The output end comprises a KEY discharging MOS switch end, a positive and negative electrode interface and an RS485 signal output end, the output end is connected with the charging and discharging interface 2, a wiring port is arranged on the inner container 33, an output end outgoing line and a communication module outgoing line of the main control board 32 penetrate through the inner container 33 through the wiring port to be connected with a PIN PIN on the inner side of the charging and discharging interface 2 respectively, intelligent charging and discharging management of a lithium battery pack system is achieved, the service life of the battery is prolonged, and stable battery capacity can be kept after the battery is charged and discharged for many times.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the terms cell, series-parallel nickel plate, tongue-and-groove, tenon, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.