CN117691272A - Battery pack supporting online capacity expansion - Google Patents

Abstract

The invention relates to a battery pack supporting online capacity expansion, which comprises a battery box formed by modularized assembly and a battery module capable of being inserted into the battery box, wherein the top of the battery box is a BMS battery management system, the top of the front surface of the battery box is provided with a power supply output terminal, the interior of the battery box is divided into a plurality of drawer type battery accommodating cavities, the front surface of the battery accommodating cavities is provided with an open end for inserting a battery module, the back of the battery box is provided with a plurality of male hot plug terminals, each male hot plug terminal corresponds to one battery accommodating cavity, and each male hot plug terminal is electrically connected with the BMS battery management system; the back of the battery module is provided with a female hot plug terminal, the battery module is used for being inserted into the battery accommodating cavity, and the electric connection between the single battery module and the BMS battery management system is realized through the opposite insertion of the female hot plug terminal and the male hot plug terminal. The invention has compact structure, supports the expansion of the online battery and can be used as a mobile power supply.

Description

Battery pack supporting online capacity expansion

Technical Field

The invention relates to the technical field of power supplies, in particular to a battery pack supporting online capacity expansion.

Background

With the increasing maturity of lithium ion battery technology, the application in the fields of communication base station energy storage, household energy storage and industrial and commercial energy storage is more and more. However, the energy to be stored in different application sites is also different, and when the energy storage power supply is configured, the configuration is often performed only according to the energy consumption design of the application sites, so as to meet the current design power consumption as a main consideration factor. However, if the electric equipment is added later, more energy needs to be stored, and the capacity expansion can be realized only by replacing the high-capacity battery pack, so that the electric equipment is very inconvenient. The standby power supply of the communication machine room needs to consider the upgrading and load capacity expansion of the communication network, and avoids the situations of power failure of a base station, network service withdrawal, early battery life termination and the like caused by insufficient standby time, so that the capacity expansion actual use requirement of a battery needs to be considered.

In the prior art, some expansion battery packs are designed, and some battery packs can only be stored and conveniently moved, but cannot be used as a mobile power supply; some battery modules have the function of a mobile power supply, but the structural design is complex, the taking and placing of the battery modules are inconvenient, more importantly, an independent control switch is lacked between the battery modules and a box body, when the battery pack is in a state of supplying power to equipment for use, once the electricity storage capacity of one battery module in the battery pack is insufficient, the whole battery pack is often required to be closed to stop supplying power to the equipment for replacement, then the battery module is taken out to replace a new battery module, otherwise, the battery module is directly pulled out under the electrified condition, the phenomena of ignition or electric arc are easy to occur, and the service life of the battery is greatly influenced.

Disclosure of Invention

The invention discloses a battery pack supporting online capacity expansion, which adopts drawer type structural layout, is convenient for taking and placing battery modules, and supports online capacity expansion, and is realized by adopting the following technical scheme:

the battery pack supporting online capacity expansion comprises a battery box formed by modularized assembly and a battery module which can be inserted into the battery box, wherein the top of the battery box is a BMS battery management system, a power supply output terminal is arranged at the top of the front surface of the battery box, the interior of the battery box is divided into a plurality of drawer type battery accommodating cavities, the front surface of the battery accommodating cavities is provided with an open-end power supply battery module for insertion, the back of the battery box is provided with a plurality of male hot plug terminals, each male hot plug terminal corresponds to one battery accommodating cavity, and each male hot plug terminal is electrically connected with the BMS battery management system; the back of battery module sets up female first hot plug terminal, and battery module's front sets up light current switch, and light current switch is used for controlling whether battery module inserts BMS battery management system, and battery module passes through female first hot plug terminal and public first hot plug terminal to the electricity of inserting realization battery module and BMS battery management system and is connected, and the layering is installed to clearance department between battery module and the battery case, and the one end of layering can be dismantled and be fixed in on the battery case, and the other end of layering is put down the outer wall of extrusion battery module to the battery case inside.

Further, a handle is arranged on the battery module.

Further, a female hot plug terminal on the battery module is provided with a positioning hole.

Further, the layering is L type structure, including laminating the vertical board of horizontal plate and perpendicular to horizontal plate on the battery box, offer the breach of stepping down of fixed orifices and battery box handle on the horizontal plate.

Further, an NTC temperature sensor is arranged on each male hot plug terminal, and the NTC temperature sensor is used for collecting the temperature of the interface of each battery module and feeding back the temperature to the BMS battery management system.

Further, the battery box comprises a box body assembly, a main control circuit assembly, a hot plug board terminal assembly and a switch panel assembly which form a BMS battery management system, wherein the box body assembly comprises a main box body, a plurality of partition boards horizontally arranged in the main box body, a back plate arranged on the back of the main box body and a top cover plate arranged on the top of the main box body; the main control circuit assembly is arranged on the top surface of the main box body and comprises a plurality of main control circuit boards, and each main control circuit board correspondingly controls one battery module; the switch panel assembly is arranged at the top of the front surface of the main box body, and comprises a power supply output terminal electrically connected with the main control circuit board, and the top cover plate covers the main control circuit assembly; the inner chamber of main tank body is separated into a plurality of batteries by the baffle and holds the chamber, and hot plug terminal subassembly sets up the back at the main tank body, and hot plug terminal subassembly includes the mounting panel, and vertical interval sets up a plurality of public first hot plug terminals on the mounting panel, and every public first hot plug terminal is connected with corresponding main control circuit board electricity respectively.

Further, the main box body comprises a left side plate, a right side plate, a bottom plate and a top plate, wherein the bottoms of the left side plate and the right side plate are respectively connected with the bottom plate, the top plate is parallel to the bottom plate, two ends of the top plate are respectively connected with the inner walls of the upper parts of the left side plate and the right side plate, the left side plate, the top plate and the right side plate are jointly enclosed to form a cavity for accommodating a main control circuit assembly, and the partition plate is arranged between the top plate and the bottom plate; the side ends of the left side plate and the right side plate in the same direction are respectively provided with a turned edge, and the turned edge is provided with a handle and a fixing hole; a supporting rib is vertically arranged between a top plate and a bottom plate on the back of the main box body, the top end of the supporting rib is fixed on the top plate, the bottom end of the supporting rib is fixed on the bottom plate, and the hot plug terminal assembly is fixedly arranged between the right side plate of the main box body and the supporting rib.

Further, the main control circuit assembly comprises a bottom plate, side plates positioned at two sides of the bottom plate and a plurality of main control circuit boards positioned on the top surface of the bottom plate, the bottoms of the side plates are connected with the bottom plate to form a U-shaped structure with an open top, a plurality of wire fixing partition plates are arranged on the top surface of the bottom plate in parallel with the side plates at intervals, wire fixing holes are formed in the wire fixing partition plates, the top of the bottom plate is divided into a plurality of circuit board accommodating cavities by the wire fixing partition plates and the side plates, and each circuit board accommodating cavity is provided with one main control circuit board; and a wiring groove is formed between the side plate and the adjacent wire fixing partition plate.

Further, a wire fixing plate is arranged on the back of the mounting plate of the hot plug terminal assembly, a wire fixing hole is formed in the wire fixing plate, a terminal mounting opening is formed in one side of the mounting plate of the wire fixing plate, the male hot plug terminal is fixed on the mounting plate at the terminal mounting opening through a screw, and a wire arrangement groove is formed between the other side of the wire fixing plate and the side wall of the main box body; the male hot plug terminal comprises a pin terminal board with pins and a pin hole board, the pin terminal board is connected with the pin hole board through a buckle, the pin terminal board and the pin hole board are reinforced through screws, and a convex positioning column is arranged on one surface, facing the battery accommodating cavity, of the pin terminal board.

Further, the back of main box still is equipped with L type reason line frid, reason line frid and main box fixed connection, reason line frid include vertical board, horizontal plate, connect vertical board and horizontal plate's hang plate, offer the solidus hole on vertical board and the horizontal plate respectively.

The battery pack designed by the invention adopts the battery box with the drawer type layout structure to accommodate a plurality of battery modules, has compact structure and small occupied space, and is convenient for taking the battery modules; each battery module can be connected with the male hot plug terminal in the battery box through the female hot plug terminal at the back of the battery module in a butt-plug manner, and the weak current switch on each battery module can independently control whether the battery module is connected with the BMS battery management system or not. The battery pack designed by the invention can meet the use requirement of load capacity expansion, is very suitable for standby power use on a communication base station, and can also be used as a mobile power supply supporting online capacity expansion.

Drawings

Fig. 1 is a schematic view of the overall structure of a battery box in an embodiment;

FIG. 2 is an exploded view of the battery case of FIG. 1;

FIG. 3 is a schematic diagram of the front structure of the main housing of the battery box;

FIG. 4 is a schematic view of the back structure of the main housing of the battery box;

FIG. 5 is a schematic view of the top cover plate structure of the battery box;

FIG. 6 is a schematic view of the back plate structure of the battery box;

FIG. 7 is a schematic view of a switch panel assembly of the battery box;

FIG. 8 is a schematic diagram of the main control circuit assembly of the battery box;

FIG. 9 is a schematic diagram of the front structure of a hot plug terminal assembly of a battery box;

FIG. 10 is a schematic view of the back side structure of a hot plug terminal assembly of a battery box;

FIG. 11 is a schematic view of a wire management slot structure of a battery box;

FIG. 12 is a schematic view of the back structure of the battery case with the back plate removed;

fig. 13 is a schematic diagram showing a front structure of a pin terminal plate in a hot plug terminal;

fig. 14 is a schematic view of the back structure of a pin terminal plate in a hot plug terminal;

FIG. 15 is a schematic view of a pin hole plate in a hot plug terminal;

fig. 16 is a partial enlarged view of the pin terminal plate and pin hole plate after assembly;

FIG. 17 is a schematic view of the overall structure of the modular battery device of the present invention;

fig. 18 is a schematic diagram of the front structure of a single battery module;

fig. 19 is a schematic view of the rear structure of a single battery module;

fig. 20 is a schematic view of the structure of the molding.

Reference numerals illustrate:

100. a main case; 101. a right side plate; 102. a left side plate; 103. a bottom plate; 104. a top plate; 105. a support rib; 106. a partition plate; 107. flanging; 108. a handle;

200. a top cover plate; 201. a heat radiation hole; 202. flanging;

300. a back plate; 301. a heat radiation hole;

400. a hot plug terminal assembly; 401. a mounting plate; 402. a side plate; 403. a wire fixing plate; 404. a pin terminal plate; 4041. a contact pin; 4042. positioning columns; 4043. a clamping groove; 405. a pin hole plate; 4051. an elastic buckle part; 406. an NTC temperature sensor; 407. a screw;

500. a master control circuit assembly; 501. a bottom plate; 502. a side plate; 503. a wire fixing partition board; 504. wiring grooves; 505. a main control circuit board;

600. a switch panel assembly; 601. a positive electrode output terminal; 602. a negative electrode output terminal;

700. a wire arranging groove plate; 701. a vertical plate; 702. a horizontal plate; 703. an inclined plate; 704. side flanging; 705. top flanging; 706. a lower hem; 707. a side flanging; 708. a wire fixing hole;

800. a battery module; 801. a handle; 802. a weak current switch; 803. a female hot plug terminal; 804. positioning holes;

900. pressing strips; 901. a horizontal plate; 902. a vertical plate; 903. a fixing hole; 904. and giving way gaps.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The embodiment discloses a battery pack supporting online capacity expansion, which comprises a battery box (shown in fig. 1) formed by modularized assembly and a battery module 800 (shown in fig. 18 and 19) which can be inserted into the battery box, wherein the top of the battery box is a BMS battery management system, a power supply output terminal is arranged at the top of the front surface of the battery box, the interior of the battery box is divided into a plurality of drawer type battery accommodating cavities, the front surface of each battery accommodating cavity is provided with an open-end power supply battery module 800 for being inserted (the battery module 800 is inserted into the battery box as shown in fig. 17), the back of the battery box is provided with a plurality of male hot plug terminals, each male hot plug terminal corresponds to one battery accommodating cavity, and each male hot plug terminal is electrically connected with the BMS battery management system; the back of the battery module 800 is provided with a female hot plug terminal 803, the battery module 800 is used for being inserted into the battery accommodating cavity, and the electric connection between the single battery module 800 and the BMS battery management system is realized through the opposite insertion of the female hot plug terminal 803 and the male hot plug terminal. The detailed structure of the battery case and the battery module 800 will be described below with reference to the drawings.

The battery box, as shown in fig. 1, 2 and 12, includes a box assembly, a main control circuit assembly 500 constituting a BMS battery management system, a hot plug terminal assembly 400, and a switch panel assembly 600, which are assembled into the battery box by a detachable structure in a modular design. The box body component is of a rectangular frame type structure and is mainly assembled by a main box body 100, a top cover plate 200 and a back plate 300. The assembled housing is open on the front side (with reference to the orientation shown in fig. 1, and the following directions are all described in the orientation shown in fig. 1), and the power module 800 is inserted from the front side, and the other five sides are all closed.

The main box 100 mainly comprises a left side plate 102, a right side plate 101, a bottom plate 103 and a top plate 104, wherein the bottoms of the left side plate 102 and the right side plate 101 are respectively connected with the bottom plate 103 into a whole to form a U-shaped structure, the top plate 104 is parallel to the bottom plate 103, two ends of the top plate 104 are respectively connected with the inner walls of the upper parts of the left side plate 102 and the right side plate 101, the tops of the left side plate 102 and the right side plate 101 are higher than the top plate 104, and a cavity enclosed by the left side plate 102 and the right side plate 101 is used for installing a main control circuit assembly 500. A plurality of horizontally placed partition boards 106 are arranged between the top board 104 and the bottom board 103 at a certain height, a battery module accommodating cavity is formed between the partition boards 106, the number of the partition boards 106 can be flexibly determined according to the capacity expansion requirement of the battery in a specific application scene, and the battery box in the embodiment is shown by taking four battery modules 800 as an example. In order to meet the hanging requirements of the battery pack in certain occasions, the side ends on the front surfaces of the left side plate 102 and the right side plate 101 of the embodiment are respectively turned outwards to form a flange 107, fixing holes are formed in the flange 107 to enable hanging and fixing to be carried out, and a handle 108 is further arranged on the flange 107 to facilitate carrying of the battery box. The top parts of the left side plate 102 and the right side plate 101 higher than the top plate 104 are respectively provided with a fixing hole for the installation and the fixed connection of the main control circuit assembly 500. In order to increase the stability, a reinforced connection is also made between the top plate 104 and the bottom plate 103 on the back of the main box 100 by means of vertically arranged support ribs 105. The supporting rib 105 of this embodiment adopts U-shaped channel steel, the top end of the supporting rib 105 is fixed on the top plate 104, and the bottom end of the supporting rib 105 is fixed on the bottom plate 103. The support rib 105 is installed at one end close to the right side plate 101, and divides the back opening of the main case 100 into two areas with different sizes, the area of the area close to one end of the right side plate 101 is smaller, and the area of the other side with larger area is used for fixedly installing the hot plug terminal assembly 400, so that a sufficient heat dissipation space can be provided for the battery module 800.

The top cover 200 is shown in fig. 5, and comprises a cover plate horizontally arranged and a flange 202 formed by bending two ends of the cover plate downwards, wherein a fixing hole is formed in the flange 202, and a heat dissipation hole 201 is formed in the cover plate. The top cover 200 is used for covering the top of the main box 100, and protecting the main control circuit assembly 500, and the flange 202 is fixedly connected with the left and right side plates of the main box 100 through screws.

As shown in fig. 6, the back plate 300 is a monolithic plate, the edge of the back plate 300 provided with the heat dissipation holes 301 is provided with fixing holes, the end parts of the left and right side plates on the back of the main box 100 and the end part of the bottom plate 103 are respectively bent inwards to form folded edges, and the back plate 300 is fixed on the folded edges of the left and right side plates and the bottom plate 103 through screws.

As shown in fig. 7, the switch panel assembly 600 includes a strip-shaped panel, the peripheral edges of the panel are bent backwards to form a folded edge, fixing holes are formed in the folded edge, power supply output terminals are respectively arranged at the left and right ends of the panel, the right side is a positive output terminal 601, and the left side is a negative output terminal 602. A display screen, a Bluetooth switch, a communication port, an indicator light and the like are arranged between the two output terminals. When the panel is mounted, the folded edges at the top of the panel are fixed on the top cover plate 200 by screws, and the left and right folded edges of the panel are fixed on the left and right side plates of the main box body 100 by screws.

As shown in fig. 8, the main control circuit assembly 500 is a BMS battery management system, and is mainly used for controlling the battery module and protecting the circuit. The circuit design of the main control circuit assembly 500 is just an existing circuit design, and the embodiment is mainly improved by hardware structural layout, and mainly comprises a bottom plate 501 which is horizontally arranged, wherein the left side and the right side of the bottom plate 501 are bent upwards to form side plates 502, and fixing holes are formed in the side plates 502. A plurality of wire fixing partition plates 503 parallel to the side plates 502 are arranged at certain intervals between the side plates 502 at two ends, wire fixing holes are formed in the wire fixing partition plates 503, the top of the bottom plate 501 is divided into a plurality of circuit board accommodating cavities by the wire fixing partition plates 503, each circuit board accommodating cavity is provided with a main control circuit board 505, and each main control circuit board 505 is used for controlling a corresponding battery module. A certain gap is left between the side plate 502 and the adjacent wire fixing partition plate 503, and the gap forms a wire groove 504 for wire routing. When the main control circuit assembly 500 is installed, it is placed on top of the top plate 104 of the main case 100, and the side plate 502 is fixedly connected with the side plate of the main case 100 by screws.

As shown in fig. 9, 10, 13, 14, 15 and 16, the hot plug terminal assembly 400 mainly comprises a vertical strip-shaped mounting plate 401, wherein one side of the mounting plate 401 is provided with a side plate 402, a fixing hole is formed in the side plate 402, other edges of the mounting plate 401 also form folded edges with holes, the width of the side plate 402 is larger than that of other folded edges, when the hot plug terminal assembly is mounted, the side plate 402 is fixed on a supporting rib 105 through screws, the top folded edge of the mounting plate 401 is fixed on a top plate 104, the bottom folded edge is fixed on a bottom plate 103, and the side folded edge is fixed on a right side plate 101. An L-shaped wire fixing plate 403 is arranged on one side of the back surface of the mounting plate 401, a horizontal plate of the wire fixing plate 403 is fixed on the back surface of the mounting plate 401, and a plurality of wire fixing holes are formed in a vertical plate of the wire fixing plate 403. A wire arranging groove is formed between the wire fixing plate 403 and the right side plate 101 of the main box body 100, and is used for wiring of the wire harness, and the combed wire harness can be fixed on the wire fixing plate 403 by using a binding belt. A plurality of terminal mounting ports are longitudinally formed in the mounting plate 401 between the wire fixing plate 403 and the side plate 402 at intervals, a male hot plug terminal is fixedly mounted at each terminal mounting port, and the male hot plug terminals are used for being connected with female hot plug terminals on the back of the battery module in an opposite-plug manner, so that each male hot plug terminal corresponds to a battery accommodating cavity, and each male hot plug terminal is connected with a corresponding main control circuit board.

Continuing with the description of the hot plug terminal, the male hot plug terminal is fixed on the mounting plate 401 by a screw, wherein the male hot plug terminal includes a PIN terminal plate 404 with a PIN and a PIN hole plate 405 mounted in cooperation with the PIN terminal plate 404. In order to facilitate the insertion of the female hot plug terminal 803 on the back of the battery module 800 into place with the male hot plug terminal, in this embodiment, a protruding positioning column 4042 is provided on the side of the pin terminal board 404 facing the battery accommodating cavity, and a positioning hole 804 is provided on the female hot plug terminal 803 on the back of the battery module 800, so that the female hot plug terminal 803 is quickly inserted into place through the cooperation of the positioning column 4042 and the positioning hole 804. The pin terminal board 404 is provided with pins 4041, and the back surface of the pin terminal board 404 is provided with a clamping groove 4043 around the pins 4041. The back of pin hole plate 405 is provided with elastic fastening parts 4051 corresponding to the positions of the respective fastening grooves 4043, and pin hole plate 405 is fixedly connected with pin terminal plate 404 by fastening means. In order to avoid the situation that the port retreats during the plugging, in this embodiment, screws 407 are used to fasten the upper and lower connection positions of the pin hole plate 405 and the pin terminal plate 404. The NTC temperature sensor 406 electrically connected to the main control circuit board is further disposed on each male hot plug terminal of the present embodiment, and the temperature of each battery module 800 can be collected in real time through the NTC temperature sensor 406, so as to avoid the damage to the battery due to the too high temperature rise caused by the too large current.

Considering that the battery box of the present embodiment has the function of supporting capacity expansion, the greater the number of battery modules inserted, the greater the number of wires connected to the main control circuit assembly 500, and in order to facilitate the carding and fixing of the wires, the present embodiment further provides a wire management slot plate 700 between the support rib 105 and the left side plate 102 at the back of the main box 100. The wire management groove plate 700 of this embodiment has an L-shaped structure as shown in fig. 11, and mainly comprises a vertical plate 701, a horizontal plate 702, and an inclined plate 703 connecting the vertical plate 701 and the horizontal plate 702, wherein wire fixing holes 708 are formed in the vertical plate 701 and the horizontal plate 702, respectively. The front and rear sides of the vertical plate 701 are respectively provided with a side flanging 704 which is bent in opposite directions, the bottom of the vertical plate 704 is inwards bent to form a lower flanging 706, the front and rear sides of the horizontal plate 702 are respectively provided with a top flanging 705 which is bent in opposite directions, and the right side end of the horizontal plate 702 is downwards bent to form a side flanging 707. When mounted, the lower flange 706 is screwed to the bottom plate 103 of the main casing 100, and the side flange 707 is screwed to the left side plate 102 of the main casing 100. A plurality of connecting wires electrically connecting the hot plug terminals and the main control circuit assembly are combed and routed along the vertical plate 701, the inclined plate 703 and the horizontal plate 702 of the wire arranging slot plate 700, and fixed by using a binding belt. The connecting wires between the main control circuit board assembly 500 and the switch panel assembly 600 can be routed along the wiring grooves 504, and the connecting wires between adjacent main control circuit boards can be bound and fixed on the wire fixing partition 503, so that the condition that the wire harness is disordered and unstable can not occur.

As a battery device supporting capacity expansion, after the battery modules 800 are inserted into the battery box to establish an electrical connection relationship through the hot plug terminals, although the connection or disconnection of each battery module 800 may be individually controlled through the BMS battery management system on the battery box, during transportation, the battery modules 800 may be accidentally activated, and circulation recharging may be sometimes performed between the plurality of battery modules 800 while storing or standing, thereby causing a serious self-discharge condition of the battery modules 800. Accordingly, as shown in fig. 18, the present invention separately provides a weak current switch 802 on each battery module 800, and the weak current switch 802 can separately control whether the battery module 800 is connected to the BMS battery management system. When the battery module 800 is inserted into the battery box and is not needed to be used, the weak current switch 802 on the battery module 800 can be closed, so that accidental activation and circulation (mutual charging) between batteries can be effectively avoided. In addition, when the electric quantity stored in a certain battery module 800 is insufficient and the battery module 800 needs to be taken out for charging, if the weak current switch 802 is not turned off, the battery module 800 is directly pulled out, a phenomenon of striking fire or arcing occurs at a hot plug terminal, the reliability of the battery is affected, and the weak current switch 802 can disconnect the electric connection between the battery module 800 and the battery box first, so that the battery module 800 is in an off-line state.

In the prior art, the battery accommodating cavity in the battery box only provides an accommodating space for the battery module, and the battery module is connected with the battery box without other fixing devices, so that shaking can occur in the transportation process, or the female hot plug terminal 803 at the back of the battery module 800 and the male hot plug terminal on the battery box are not in place, so that the battery module 800 is prevented from falling off from the battery box accidentally, and in the embodiment, the pressing strips 900 are additionally arranged on two sides of the battery box to fix the positions between the battery module 800 and the battery box. As shown in fig. 17 and 20, the molding 900 has an L-shaped structure as a whole, and includes a horizontal plate 901 and a vertical plate 902, and a fixing hole 903 and a relief notch 904 are formed in the horizontal plate 901. The width of the horizontal plate 901 is larger than the width of the flanging 107 of the main box body 100 of the battery box, after the battery module 800 is inserted into the battery box, the horizontal plate 901 of the pressing strip 900 is attached to the outer wall of the flanging 107 and fixed by screws, one side of the horizontal plate 901 exceeding the width of the flanging 107 forms extrusion to the outer wall of the battery module 800, and under the thrust of the pressing strip 900, a hot plug terminal between the battery module 800 and the battery box is quite firm in opposite insertion, so that poor contact of the terminal is difficult to occur. The vertical plate 902 enhances the strength of the horizontal plate 901, and the relief notch 904 provides a relief space for the handle 108 on the flange 107 of the main housing 100.

The battery module 800 adopts drawer type structure to get with the battery case and puts, for the taking of making things convenient for battery module 800, the front of every battery module 800 still is equipped with handle 801, and this handle 801 can overturn downwards and laminate with battery module 800 outer wall, reduces the occupation in space.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A battery supporting on-line capacity expansion, characterized by: the battery box is assembled in a modularized manner, and a battery module can be inserted into the battery box, wherein the top of the battery box is a BMS battery management system, the top of the front surface of the battery box is provided with a power supply output terminal, the interior of the battery box is divided into a plurality of drawer type battery accommodating cavities, the front surface of the battery accommodating cavities is provided with an open end for inserting the battery module, the back of the battery box is provided with a plurality of male hot plug terminals, each male hot plug terminal corresponds to one battery accommodating cavity, and each male hot plug terminal is electrically connected with the BMS battery management system; the back of battery module sets up female first hot plug terminal, and battery module's front sets up light current switch, and light current switch is used for controlling whether battery module inserts BMS battery management system, and battery module passes through female first hot plug terminal and public first hot plug terminal to the electricity of inserting realization battery module and BMS battery management system and is connected, and the layering is installed to clearance department between battery module and the battery case, and the one end of layering can be dismantled and be fixed in on the battery case, and the other end of layering is put down the outer wall of extrusion battery module to the battery case inside.

2. The battery pack supporting on-line capacity expansion according to claim 1, wherein: and a handle is arranged on the battery module.

3. The battery pack supporting on-line capacity expansion according to claim 1, wherein: and the female hot plug terminal on the battery module is provided with a positioning hole.

4. The battery pack supporting on-line capacity expansion according to claim 1, wherein: the layering is L type structure, including laminating the vertical board of horizontal plate and perpendicular to horizontal plate on the battery box, offer the breach of stepping down of fixed orifices and battery box handle on the horizontal plate.

5. The battery pack supporting on-line capacity expansion according to claim 1, wherein: and an NTC temperature sensor is arranged on each male hot plug terminal, and the NTC temperature sensor is used for collecting the temperature of the interface of each battery module and feeding back to the BMS battery management system.

6. The battery pack supporting on-line capacity expansion according to claim 1, wherein: the battery box comprises a box body assembly, a main control circuit assembly, a hot plug board terminal assembly and a switch panel assembly, wherein the main control circuit assembly, the hot plug board terminal assembly and the switch panel assembly form a BMS battery management system, and the box body assembly comprises a main box body, a plurality of partition boards horizontally arranged in the main box body, a back plate arranged on the back of the main box body and a top cover plate arranged on the top of the main box body; the main control circuit assembly is arranged on the top surface of the main box body and comprises a plurality of main control circuit boards, and each main control circuit board correspondingly controls one battery module; the switch panel assembly is arranged at the top of the front surface of the main box body, and comprises a power supply output terminal electrically connected with the main control circuit board, and the top cover plate covers the main control circuit assembly; the inner chamber of main tank body is separated into a plurality of batteries by the baffle and holds the chamber, and hot plug terminal subassembly sets up the back at the main tank body, and hot plug terminal subassembly includes the mounting panel, and vertical interval sets up a plurality of public first hot plug terminals on the mounting panel, and every public first hot plug terminal is connected with corresponding main control circuit board electricity respectively.

7. The battery pack supporting on-line capacity expansion according to claim 6, wherein: the main box body comprises a left side plate, a right side plate, a bottom plate and a top plate, wherein the bottoms of the left side plate and the right side plate are respectively connected with the bottom plate, the top plate is parallel to the bottom plate, two ends of the top plate are respectively connected with the inner walls of the upper parts of the left side plate and the right side plate, the left side plate, the top plate and the right side plate jointly enclose a cavity for accommodating a main control circuit assembly, and the partition plate is arranged between the top plate and the bottom plate; the side ends of the left side plate and the right side plate in the same direction are respectively provided with a turned edge, and the turned edge is provided with a handle and a fixing hole; a supporting rib is vertically arranged between a top plate and a bottom plate on the back of the main box body, the top end of the supporting rib is fixed on the top plate, the bottom end of the supporting rib is fixed on the bottom plate, and the hot plug terminal assembly is fixedly arranged between the right side plate of the main box body and the supporting rib.

8. The battery pack supporting on-line capacity expansion according to claim 6, wherein: the main control circuit assembly comprises a bottom plate, side plates positioned at two sides of the bottom plate and a plurality of main control circuit boards positioned on the top surface of the bottom plate, wherein the bottom of the side plates is connected with the bottom plate to form a U-shaped structure with an open top, a plurality of wire fixing partition plates are arranged on the top surface of the bottom plate parallel to the side plates at intervals, wire fixing holes are formed in the wire fixing partition plates, the wire fixing partition plates and the side plates divide the top of the bottom plate into a plurality of circuit board accommodating cavities, and each circuit board accommodating cavity is provided with one main control circuit board; and a wiring groove is formed between the side plate and the adjacent wire fixing partition plate.

9. The battery pack supporting on-line capacity expansion according to claim 6, wherein: the back of the mounting plate of the hot plug terminal assembly is provided with a wire fixing plate, the wire fixing plate is provided with a wire fixing hole, one side of the mounting plate of the wire fixing plate is provided with a terminal mounting port, the male hot plug terminal is fixed on the mounting plate at the terminal mounting port through a screw, and a wire arranging groove is formed between the other side of the wire fixing plate and the side wall of the main box body; the male hot plug terminal comprises a pin terminal board with pins and a pin hole board, the pin terminal board is connected with the pin hole board through a buckle, the pin terminal board and the pin hole board are reinforced through screws, and a convex positioning column is arranged on one surface, facing the battery accommodating cavity, of the pin terminal board.

10. The battery pack supporting on-line capacity expansion according to claim 6, wherein: the back of main box still is equipped with L type reason line frid, reason line frid and main box fixed connection, reason line frid include vertical board, horizontal plate, connect vertical board and horizontal plate's hang plate, offer the solidus hole on vertical board and the horizontal plate respectively.