CN220341418U - Battery pack - Google Patents

Abstract

The utility model discloses a battery pack, which comprises an upper box cover and a main box body; the upper case cover and the main case body are buckled up and down to form a battery cavity for placing the battery module; the front end and the rear end of the inner side of the bottom of the main box body are respectively welded with a supporting cross beam; the middle parts of the opposite sides of the two supporting beams are connected through a slave control module mounting plate; the top of the slave control module mounting plate is provided with a slave control module; the plugging surface of the slave control module faces upwards; the bottoms of the front side and the rear side of the main box body are respectively welded with a whole car mounting and welding bracket; the whole vehicle mounting welding bracket is fixedly connected with the whole vehicle battery bracket; a plurality of rigid support plates are arranged at the bottom of the main box body; the main box bottom panel and the rigid supporting plate are provided with a plurality of hole slave control modules, including a slave control board, a slave control mounting bracket and a slave control board upper cover bracket; the slave control mounting bracket and the slave control board upper cover bracket are buckled left and right. The battery pack has good heat radiation performance, can ensure the working performance of the battery pack, and has wide application prospect.

Description

Battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background

Currently, with the continuous popularization of electric vehicles and renewable energy applications, the battery pack is used as a core component for energy storage and transmission, and the performance requirements of the battery pack are higher and higher.

The existing battery pack has poor heat dissipation performance, and cannot effectively reduce the temperature which is increased when driving electric equipment to operate, so that the working performance of the battery pack and the service life of the battery in the battery pack are affected.

In addition, the weight and volume of the battery pack have an important influence on vehicle performance and energy utilization efficiency. Conventional battery packs are typically made of a large amount of metal material, resulting in a large weight, high cost, and negative environmental impact.

Therefore, there is an urgent need to develop a technology capable of solving the above technical problems.

Disclosure of Invention

The utility model aims at overcoming the technical defects existing in the prior art and provides a battery pack.

To this end, the utility model provides a battery pack comprising an upper case cover and a main case body;

the upper box cover is of a hollow structure with an opening at the top;

the upper case cover and the main case body are buckled up and down to form a battery cavity;

the battery cavity is used for placing a plurality of battery modules;

the front end and the rear end of the inner side of the bottom of the main box body are respectively welded with a transversely distributed supporting beam;

one side of the two opposite supporting cross beams is connected through a plurality of supporting longitudinal beams;

the front end and the rear end of each supporting longitudinal beam are respectively and vertically connected with the adjacent supporting cross beams;

the middle parts of the opposite sides of the two supporting beams are connected through slave control module mounting plates which are longitudinally distributed;

the top of the slave control module mounting plate is fixedly provided with a slave control module;

the plugging surface of the slave control module faces upwards;

the left side and the right side of the slave control module are respectively provided with the same number of battery modules;

the battery modules at the left side and the right side of the slave control module are symmetrically distributed;

the bottoms of the front side and the rear side of the main box body are respectively welded with a whole vehicle mounting welding bracket which is transversely distributed;

the whole vehicle mounting welding bracket is fixedly connected with an external whole vehicle battery bracket;

a plurality of rigid support plates are arranged at the bottom of the main box body;

a plurality of holes are formed in the bottom panel of the main box body and the rigid supporting plate;

the slave control module comprises a slave control board, a slave control mounting bracket and a slave control board upper cover bracket;

the slave control mounting bracket and the slave control board upper cover bracket are buckled together left and right to form a slave control board accommodating cavity for accommodating the slave control board;

the right side of the slave control mounting bracket is fixedly connected with the slave control board;

the front end and the rear end of the slave control mounting bracket are respectively fixedly connected with the front end and the rear end of the slave control board upper cover bracket.

Compared with the prior art, the battery pack provided by the utility model has the advantages that the design is scientific, the heat dissipation performance is better, the temperature which is increased when the electric equipment is driven to operate can be effectively reduced, the working performance of the battery pack is ensured, and the service life of the battery is prolonged, so that the battery pack has wide application prospect, and can play an important role in the field of commercial vehicles.

In addition, the control panel is arranged in the center of the box body, so that interference and intersection between wire harnesses are reduced, reliability and stability of signal transmission are improved, the battery is conveniently managed and monitored, and the use efficiency and safety of the battery are improved.

In addition, the battery pack is made of light materials, and has higher strength and rigidity on the basis of keeping the working performance of the battery pack by adopting various optimal designs, and meanwhile, the weight of the whole equipment can be effectively reduced.

Drawings

Fig. 1 is a perspective exploded view of a battery pack according to the present utility model;

fig. 2 is a schematic exploded perspective view of a slave module in a battery pack according to the present utility model.

Fig. 3 is a schematic perspective view of an embodiment of a main case in a battery pack according to the present utility model;

fig. 4 is a schematic perspective view of an embodiment of a main case in a battery pack according to the present utility model;

fig. 5 is a schematic perspective view of a battery pack according to the present utility model when assembled;

fig. 6 is a schematic three-dimensional view of an embodiment of a main case in a battery pack according to the present utility model;

fig. 7 is an enlarged perspective view of a connecting bracket in a battery pack according to the present utility model;

fig. 8 is an enlarged schematic view of a three-dimensional knot of a hanging tab in a battery pack according to the present utility model;

the figure shows: 1. the main box body, the upper box cover, the slave control module, the sealing ring and the wire harness are arranged in sequence;

6. the battery module, 7, the overcurrent assembly, 8, the aviation plug assembly;

31. the slave control board, 32, a slave control mounting bracket, 33, a slave control board upper cover bracket;

11. the device comprises a supporting longitudinal beam, a supporting cross beam, a whole vehicle mounting hole, a hanging lug and an aeronautical plug front panel, wherein the supporting longitudinal beam, the supporting cross beam, the whole vehicle mounting hole, the hanging lug and the aeronautical plug front panel are arranged in sequence;

16. the whole vehicle is provided with a welding bracket 171, a first rigid supporting plate 172, a second rigid supporting plate 18 and a connecting bracket.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 to 8, the present utility model provides a battery pack including an upper case cover 2 and a main case 1;

the upper case cover 2 is of a hollow structure with an opening at the top;

the upper case cover 2 and the main case body 1 are buckled up and down to form a battery cavity;

a battery cavity for accommodating a plurality of battery modules 6;

the front and rear ends of the inner side of the bottom of the main box body 1 are respectively welded with a transversely distributed supporting cross beam 12;

the opposite sides of the two supporting cross beams 12 are connected through a plurality of supporting longitudinal beams 11;

the front end and the rear end of each supporting longitudinal beam 11 are respectively and vertically connected with the adjacent supporting cross beams 12;

the middle parts of the opposite sides of the two supporting beams 12 are connected through slave control module mounting plates 19 which are longitudinally distributed;

the top of the slave module mounting plate 19 is fixedly provided with a slave module 3;

the plugging surface of the slave control module 3 (i.e. the plugging surface of the plugging portion 310) faces upwards;

the slave control module 3 has the same number (for example, two on each side) of battery modules 6 on the left and right sides;

the battery modules at the left side and the right side of the slave control module 3 are symmetrically distributed;

in the present utility model, the slave module 3 may be conveniently plugged with its plugging surface facing upward.

The bottoms of the front side and the rear side of the main box body 1 are respectively welded with a whole vehicle mounting welding bracket 16 which is transversely distributed;

the whole vehicle mounting welding bracket 16 is fixedly connected with an external whole vehicle battery bracket (namely, the whole vehicle battery bracket on the external electric vehicle);

a plurality of rigid support plates are arranged at the bottom of the main box body 1;

a plurality of holes are arranged on the bottom panel and the rigid supporting plate of the main box body 1.

In the present utility model, in particular, each of the battery modules 6 has one end plate at each of the left and right ends;

the front and rear ends of each battery module 6 are respectively provided with a side panel;

the left end and the right end of each side panel are respectively connected with the adjacent end plates;

the front side and the rear side of each end plate are respectively provided with an end plate positioning hole which vertically penetrates through the end plates;

wherein, a terminal plate of the battery module 6 is arranged right above each supporting longitudinal beam 11;

the supporting longitudinal beam 11 is respectively provided with a supporting longitudinal beam positioning hole at a position corresponding to each end plate positioning hole on the end plate;

each supporting longitudinal beam positioning hole is welded with a first nut respectively;

the battery module 6 is fixedly connected with a supporting longitudinal beam 11 on the main box body 1 through a long screw;

the long screw rod sequentially passes through the end plate positioning hole and the first nut on the end plate of the battery module 6 corresponding to the position, and is fixedly connected with the first nut through threads.

In particular, heating films which are transversely distributed are respectively arranged on the inner sides of the two side face plates of each battery module 6;

the heating film is contacted with the battery unit in the battery module 6;

it should be noted that, through the heating film, can start the heating function when ambient temperature is lower, carry out the circular telegram to the heating film for the heating film gives off heat, as soon as possible with the temperature rise to the most suitable operating temperature of battery.

In particular, the battery cell in the battery module 6 is a lithium ion battery.

In the utility model, the supporting longitudinal beam 11 and the supporting transverse beam 12 are welded with the main box body 1;

the slave control module mounting plate 19 is welded with the main box body 1;

it should be noted that, the inside welding of main casing 1 has vertically and horizontally distributed's support longeron 11 and supporting beam 12, mainly used supports battery module 6, and the welding of support longeron 11 internal surface has the first nut that carries out fixed with battery module 6, and battery module 6 passes through long screw rod and supports longeron 11 fixed connection.

In the utility model, a plurality of foam pieces 20 are adhered to the inner side of the bottom of the main box body 1;

foam 20 located right below the battery module 6;

it should be noted that, every piece of foam 20's one side all is provided with bonding glue, bond the cavity department between the inboard support longeron 11 of main tank body 1 bottom and the support crossbeam 12, namely under the battery module 6, the suitable position has two pieces of foam 20 under every battery module 6 all, foam's thickness is slightly higher than the inboard support longeron 11 and the support crossbeam 12 of main tank body 1 bottom, when carrying out battery module installation, the battery module can contact foam earlier, foam receives the extrusion back and contacts crossbeam and longeron again, foam plays the cushioning effect in the installation, prevent that the module that workman misoperation caused from colliding with.

In the present utility model, the upper case cover 2 and the main case 1 are fixedly connected by a plurality of fastening bolts.

In the present utility model, in particular, the bottom of the upper case cover 2 is circumferentially provided with a ring of upper case sealing edge portions 201 protruding outward;

a circle of outwardly protruding main box sealing edge parts 101 are circumferentially arranged at the top of the main box 1;

the upper box sealing edge part 201 and the main box sealing edge part 101 are arranged in an up-down opposite direction;

the sealing ring 4 is arranged between the upper box sealing edge 201 and the main box sealing edge 101, so that an effective sealing effect can be achieved.

In particular, the upper and lower sides of the sealing ring 4 are respectively bonded with the bottom surface of the upper box sealing edge 201 and the top surface of the main box sealing edge 101, so that the sealing effect is practically ensured.

In particular, the upper case sealing edge 201 is fixedly connected to the main case sealing edge 101 by a plurality of fastening bolts.

In the utility model, the slave control module 3 comprises a slave control board 31, a slave control mounting bracket 32 and a slave control board upper cover bracket 33;

the slave control mounting bracket 32 and the slave control board upper cover bracket 33 are buckled together left and right to form a slave control board accommodating cavity for accommodating the slave control board 31;

the right side of the slave control mounting bracket 32 is fixedly connected with the slave control board 31;

the front and rear ends of the slave control mounting bracket 32 are fixedly connected with the front and rear ends of the slave control board upper cover bracket 33 respectively;

in the present utility model, in particular, the slave mounting bracket 32 and the slave board upper cover bracket 33 are provided with two first heat dissipation openings 21 and two second heat dissipation openings 22 at positions corresponding to the slave board 31, respectively.

It is to be noted that, as is well known, the slave board 31 is a complex integrated electronic component, and has a characteristic of high heat generation, so that the components for fixing the slave board in the slave module 2 are all provided with openings for heat dissipation. Thereby improving the working stability of the whole slave control module.

In particular, a plurality of plug-in parts 310 are arranged at the upper end of the right side of the slave control board 31;

a longitudinally distributed connector exposing opening is arranged between the upper right end of the slave control mounting bracket 32 and the upper left end of the slave control upper cover bracket 33;

the plug part exposing opening is arranged corresponding to the plug part 310;

further, the connector 310 of the slave control board 31 is parallel to the main body of the slave control mounting bracket 32 and the main body of the slave control board upper cover bracket 33.

In particular, regarding the right side of the slave control mounting bracket 32, the slave control mounting bracket is fixedly connected with the slave control board 31, and the specific structural design is as follows:

a plurality of slave control mounting bracket mounting holes are formed in the slave control mounting bracket 32;

a second nut is welded on each slave control mounting bracket mounting hole;

the slave control board 31 is provided with a slave control board mounting hole at a position corresponding to the second nut on each slave control mounting bracket mounting hole;

the slave control board 31 is fixed on the slave control mounting bracket 32 through a plurality of second bolts;

the second bolts sequentially pass through the corresponding slave control plate mounting holes and the second nuts and are fixedly connected with the second nuts through threads.

In particular, regarding the front and rear ends of the slave control mounting bracket 32, the front and rear ends of the slave control board upper cover bracket 33 are fixedly connected respectively, and the specific structural design is as follows:

the front end and the rear end of the slave control mounting bracket 32 are respectively provided with a transverse right bending part 321;

from the front and rear ends of the upper cover support 33, there is a transverse left-bending part 331

Two studs distributed up and down are respectively arranged on one side opposite to the two transverse right bending parts 321;

a transverse left bending part 331 of the upper cover bracket 33 of the control board is provided with a stud through hole at a position corresponding to each stud;

the stud passes through the stud through hole and is fixedly connected with the third nut through threads.

In the present utility model, the slave board 31 is fixed on the slave mounting bracket 32, and holes (i.e. stud through holes) that match with studs on the slave mounting bracket 32 are provided at corresponding positions of the slave board upper cover bracket 33, and the slave board upper cover bracket 33 is mounted on the slave mounting bracket 32 through a third nut to form the slave module 3.

In particular, regarding the top of the slave module mounting board 19, the slave module 3 is fixedly disposed, and the specific structural design is as follows:

the slave control module 3 is fixedly connected with the slave control module mounting plate 19 through a plurality of fourth bolts;

the bottom of the slave control mounting bracket 32 of the slave control module 3 is provided with a horizontal bending part 322 which is vertically bent rightwards;

a plurality of horizontal bending part through holes are formed in the horizontal bending part 322 at equal intervals;

the slave module mounting plates 19 are respectively provided with a slave module mounting plate threaded mounting hole at positions corresponding to the through holes of each horizontal bending part;

the fourth bolt passes through the horizontal bending part through hole on the horizontal bending part 322 and is fixedly connected with the control module mounting plate threaded mounting hole corresponding to the position.

In the present utility model, the slave module 3 is fixedly connected to the slave module mounting plate 19 welded to the center inside the main casing 1 by a fourth bolt.

In the utility model, in particular implementation, an aviation plug assembly 8 is arranged on an aviation plug front panel 15 on the right side of a main box body 1;

it should be noted that, the avionic plug assembly 8 specifically includes electrical assemblies mature in the prior art, such as total positive avionic plug, total negative avionic plug, communication avionic plug, heating avionic plug, MSD (manual maintenance switch), and the like, and these assemblies are all fixedly connected with the avionic plug front panel 15 by bolts

The aviation plug assembly 8 is used for transmitting electric energy. An overcurrent assembly 7 is used between the aviation plug assembly 8 and the battery module 6;

the overcurrent assembly 7 specifically comprises a long copper bar 71 connected in series between modules, a short copper bar 72 connected in series between modules, a total positive lead-out bar 73 and a total negative lead-out bar 74, which are fixedly connected with the battery modules through bolts, wherein the total positive lead-out bar 73 and the total negative lead-out bar 74 are fixedly connected with corresponding aviation plugs (namely total positive aviation plug and total negative aviation plug) through bolts.

It should be noted that, the connection manner between the overcurrent assembly 7 and the battery module is a conventional and well-known manner, and will not be described herein.

In the present utility model, the inter-module long copper bars 71 and the inter-module short copper bars 72 (i.e., bus bars) in the overcurrent assembly 7 are connected (welded) to the collecting terminals (collecting wires) on the wire harness 5.

The wire harness 5 is a slave module 2 in which a plurality of collection wires are gathered, and each collection wire is welded to a busbar of one cell in the module through a terminal (i.e., a voltage collection terminal) connected thereto. Each busbar is welded with a voltage acquisition terminal.

It should be noted that, the battery modules on two sides of the slave control module 3 and the number and positions of the battery cells are symmetrically arranged, so that the wire harness 5 for sampling the voltage of the battery cells is more neat and attractive, interference and intersection between the wire harnesses 5 are reduced, and reliability and stability of signal transmission are improved.

The connector 310 of the slave control board 31 is used for connecting the wire harness 5, specifically, connecting terminals arranged in the middle of the wire harness 5, so as to realize good opposite insertion.

In the utility model, on the concrete realization, the left and right ends of the front and back sides of the main box body 1 are respectively welded with connecting brackets 18;

each connecting bracket 18 is fixedly connected with a hanging lug 14 through a bolt,

in particular, the connecting bracket 18 is a bracket in a shape of a Chinese character 'ji';

the hanging lugs 14 are J-shaped hanging lugs.

The lugs 14 fixed on the connecting bracket 18 are used for integral hoisting of the battery pack.

In the utility model, the bottom surface of the whole car mounting welding bracket 16 and the bottom surface of the main box body 1 are positioned on the same plane;

the whole vehicle mounting and welding bracket 16 is fixedly connected with an external whole vehicle battery bracket (namely, the whole vehicle battery bracket on the external electric vehicle) through a plurality of fifth bolts;

in the concrete implementation, a plurality of mounting holes of the whole vehicle battery bracket are arranged on the whole vehicle mounting welding bracket 16 at equal intervals;

a fifth nut 161 is welded on each whole vehicle battery bracket mounting hole;

the external whole vehicle battery bracket is provided with a whole vehicle battery bracket butt joint hole at a position corresponding to the fifth nut 161 on the whole vehicle battery bracket mounting hole;

the fifth bolt sequentially passes through the corresponding whole vehicle battery bracket butt joint hole and the fifth nut 161, and is fixedly connected with the fifth nut 161 through threads.

In particular implementation, the whole vehicle mounting and welding bracket 16 is provided with a reinforcing rib 162 which is vertically distributed on the left side and the right side of each fifth nut 161 respectively;

the lower ends of the reinforcing ribs 162 are welded with the whole vehicle mounting and welding bracket 16;

the upper ends of the reinforcing ribs 162 are welded to the front side or rear side of the main casing 1.

In the present utility model, the reinforcing ribs are vertically provided on both sides of the fifth nut 161 on the mounting hole of the whole vehicle battery bracket, so that the strength and stability of the connection with the whole vehicle can be ensured.

In the present utility model, in particular implementation, a plurality of first rigid support plates 171 (not limited to two) are welded at the bottom of the main case 1;

a plurality of first rigid support plates 171 welded to a plurality of second rigid support plates 172 (not limited to four) equally spaced apart;

the second rigid support plate 172 is longitudinally disposed and vertically connected to the first rigid support plate 171;

the top surface of the first rigid support plate 171 is welded to the bottom of the main casing 1;

the lateral length of the first rigid support plate 171 is equal to the lateral length of the bottom of the main casing 1.

The first rigid support plate 171 and the second rigid support plate 172 are each provided with a plurality of circular support plate holes.

The plurality of circular support plate holes on the first rigid support plate 171 and the second rigid support plate 172 are all equally spaced.

The first rigid support plate 171 and the second rigid support plate 172 are fixedly connected to the corresponding positions of the main casing 1 by means of edge position welding.

In the concrete implementation, a main box body hole (not shown) is formed in a position corresponding to each supporting plate hole on the bottom panel of the main box body 1;

the shape and the size of the holes of the main box body are correspondingly matched (for example, the same as) with those of the holes of the supporting plate;

further, the shape of the main case hole is circular, and its diameter is greater than the lateral width of the battery cells in the battery module 6 and less than the longitudinal width of the battery cells in the battery module 6.

The battery module 6 includes a plurality of square battery cells arranged in parallel in the lateral direction, and the lateral width of each square battery cell is smaller than the longitudinal width;

it should be noted that, through the first rigid support plate 171 and the second rigid support plate 172 at the bottom of the main case 1, structural stability is advantageously enhanced: the longitudinal and transverse uniform distribution of the first and second rigid support plates 171 and 172 can enhance the structural stability of the battery pack, and prevent the battery pack from being deformed or inclined during use.

In addition, by providing the circular support plate holes on the first and second rigid support plates 171 and 172 at the bottom of the main casing 1 and the main casing holes on the bottom panel of the main casing 1, the contact area with air can be increased, the heat dissipation effect on the battery pack can be improved, and thus the structural strength of the bottom of the main casing can be enhanced while the internal temperature of the battery pack can be maintained stable, thereby prolonging the service life of the battery and improving the performance.

In addition, under the above structural design, the first rigid support plate 171 and the second rigid support plate 172 at the bottom of the main casing 1 are directly contacted with the installation bottom surface on the external whole vehicle battery bracket, so that the abrasion to the bottom of the battery pack can be reduced in the process of installation and disassembly.

In the utility model, in particular implementation, the top of the upper case cover 2 is provided with a plurality of convex hulls 23 which are distributed at intervals;

the plurality of convex hulls 23 are uniformly distributed on the upper cover along the length direction of the upper cover.

In terms of enhancing structural strength, the convex hulls can increase the supporting area of the upper cover 2, thereby enhancing the stability and bearing capacity of the upper cover and preventing the upper cover from being accidentally damaged during transportation or use.

In addition, the convex hulls can disperse the pressure of the upper case cover 2, so that the risk of deformation of the upper case cover 2 due to overlarge stress is reduced.

Specifically, when an upper case lid 2 is subjected to an external force, the plurality of convex hulls can disperse these forces over the entire upper case lid 2 surface, thereby allowing the upper case lid 2 to be more uniformly subjected to pressure, avoiding local deformation or breakage. In addition, the plurality of convex hulls can also increase the rigidity and strength of the upper case cover 2, making it more durable and reliable.

Therefore, the plurality of convex hulls are designed on the upper case cover 2, so that the structural strength and the safety of the case cover can be improved, the risks in the transportation and use processes are reduced, and the service life of the case cover is prolonged.

In particular, the main box body 1 is made of galvanized plates, and the upper box cover 2 is made of galvanized plates, so that the corrosion resistance and the oxidation resistance of the battery pack are improved, the energy consumption is reduced, the cost is saved, and the light-weight requirement is met.

In particular, the first rigid support plate 171 and the second rigid support plate 172 are steel plates, preferably stainless steel plates.

The utility model adopts the design of the optimized wiring harness arrangement, the rigid supporting plate, the round holes (comprising the supporting plate holes and the main box body holes) which are beneficial to heat dissipation, and the like, further improves the performance and the stability of the battery pack, and is hopeful to provide powerful support for the development of the fields of electric automobiles, renewable energy sources and the like.

In the concrete implementation, the main box body and parts thereof are all made of galvanized sheets, namely, light materials are adopted, and the long screw and part of fasteners are made of low-carbon steel materials.

The galvanized plate and the low-carbon steel material are lighter in weight than cold rolled Steel (SPCC), have higher strength than steel, have higher strength and rigidity, and have the characteristics of corrosion resistance and oxidation resistance; the low-carbon steel has lower strength and hardness and better plasticity and toughness; the two are combined together for use, so that the bearing capacity and the crashworthiness of the battery pack are improved, the quality of the battery pack is lightened, the structural safety of the battery pack is ensured, and the light weight of the battery pack is realized.

It should be noted that, for the utility model, all the partial components on the main box body are connected by bolts, which is convenient for maintenance and replacement of the battery pack.

Compared with the prior art, the battery pack provided by the utility model has the following beneficial effects:

1. compared with the prior art, the utility model realizes perfect combination of traditional materials, mechanical bearing structures and wiring harness arrangement, and the slave control board is arranged in the center of the box body, so that the battery is convenient to manage and monitor, the wiring harness arrangement is optimized, and the reliability and stability of signal transmission are improved.

2. Compared with the traditional battery pack scheme, the utility model is more reliable and stable, and on the premise of meeting the basic performance requirements of the battery pack, such as collision safety, heat dissipation, insulation, water resistance and the like, the novel box body material is selected, so that the corrosion resistance and the oxidation resistance of the battery pack are improved, the energy consumption is reduced, the cost is saved, and the light-weight requirement is met.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims (10)

1. A battery pack, which is characterized by comprising an upper case cover (2) and a main case body (1);

the upper case cover (2) is of a hollow structure with an opening at the top;

the upper case cover (2) and the main case body (1) are buckled up and down to form a battery cavity;

a battery cavity for placing a plurality of battery modules (6);

the front end and the rear end of the inner side of the bottom of the main box body (1) are respectively welded with a transversely distributed supporting cross beam (12);

one side of the two supporting cross beams (12) opposite to each other is connected through a plurality of supporting longitudinal beams (11);

the front end and the rear end of each supporting longitudinal beam (11) are respectively and vertically connected with the adjacent supporting cross beams (12);

the middle parts of the opposite sides of the two supporting beams (12) are connected through slave control module mounting plates (19) which are longitudinally distributed;

the top of the slave control module mounting plate (19) is fixedly provided with a slave control module (3);

the plugging surface of the slave control module (3) faces upwards;

the left side and the right side of the slave control module (3) are respectively provided with the same number of battery modules (6);

the battery modules at the left side and the right side of the slave control module (3) are symmetrically distributed;

the bottoms of the front side and the rear side of the main box body (1) are respectively welded with a whole vehicle mounting welding bracket (16) which is transversely distributed;

the whole vehicle mounting welding bracket (16) is fixedly connected with an external whole vehicle battery bracket;

a plurality of rigid support plates are arranged at the bottom of the main box body (1);

a plurality of holes are arranged on the bottom panel and the rigid supporting plate of the main box body (1);

the slave control module (3) comprises a slave control board (31), a slave control mounting bracket (32) and a slave control board upper cover bracket (33);

the slave control mounting bracket (32) and the slave control board upper cover bracket (33) are buckled together left and right to form a slave control board accommodating cavity for accommodating the slave control board (31);

the right side of the slave control mounting bracket (32) is fixedly connected with the slave control board (31);

the front and rear ends of the slave control mounting bracket (32) are respectively fixedly connected with the front and rear ends of the slave control upper cover bracket (33).

2. The battery pack according to claim 1, wherein each of the battery modules (6) has one end plate at each of the left and right ends thereof;

the front end and the rear end of each battery module (6) are respectively provided with a side face panel;

the left end and the right end of each side panel are respectively connected with the adjacent end plates;

the front side and the rear side of each end plate are respectively provided with an end plate positioning hole which vertically penetrates through the end plates;

wherein, a terminal plate of the battery module (6) is arranged right above each supporting longitudinal beam (11);

the supporting longitudinal beam (11) is provided with a supporting longitudinal beam positioning hole at a position corresponding to each end plate positioning hole on the end plate;

each supporting longitudinal beam positioning hole is welded with a first nut respectively;

the battery module (6) is fixedly connected with a supporting longitudinal beam (11) on the main box body (1) through a long screw;

the long screw rod sequentially passes through an end plate positioning hole and a first nut on an end plate of the battery module (6) corresponding to the position, and is fixedly connected with the first nut through threads;

the inner sides of the two side face plates of each battery module (6) are respectively provided with heating films which are transversely distributed;

the heating film is in contact with the battery cells in the battery module (6).

3. A battery pack according to claim 1, wherein the bottom of the upper case lid (2) is circumferentially provided with a ring of outwardly projecting upper case sealing edge portions (201);

a circle of main box sealing edge parts (101) protruding outwards are arranged on the top of the main box (1) in a surrounding manner;

the upper box sealing edge part (201) and the main box sealing edge part (101) are arranged in a vertically opposite mode;

a sealing ring (4) is arranged between the upper box sealing edge part (201) and the main box sealing edge part (101);

the upper side and the lower side of the sealing ring (4) are respectively adhered to the bottom surface of the upper box sealing edge part (201) and the top surface of the main box sealing edge part (101);

the upper box sealing edge part (201) is fixedly connected with the main box sealing edge part (101) through a plurality of fastening bolts.

4. The battery pack according to claim 1, wherein a plurality of plug-in parts (310) are provided from the upper right end of the control board (31);

the upper end of the right side of the slave control mounting bracket (32) and the upper end of the left side of the slave control upper cover bracket (33) are provided with longitudinally distributed plug-in part exposing openings;

the connector part exposing opening is arranged corresponding to the connector part (310).

5. The battery pack according to claim 1, wherein a plurality of slave mounting bracket mounting holes are provided on the slave mounting bracket (32);

a second nut is welded on each slave control mounting bracket mounting hole;

the slave control board (31) is provided with a slave control board mounting hole at a position corresponding to the second nut on each slave control mounting bracket mounting hole;

the slave control board (31) is fixed on the slave control mounting bracket (32) through a plurality of second bolts;

the second bolts sequentially pass through the corresponding slave control plate mounting holes and the second nuts and are fixedly connected with the second nuts through threads.

6. The battery pack according to claim 1, wherein the slave mounting bracket (32) has a lateral rightward bent portion (321) at each of front and rear ends thereof;

the front and rear ends of the upper cover bracket (33) of the slave control board are respectively provided with a transverse left bending part (331)

Two studs distributed up and down are respectively arranged on one side opposite to the two transverse right bending parts (321);

a transverse left bending part (331) of the upper cover bracket (33) of the control board is provided with a stud through hole at a position corresponding to each stud;

the stud passes through the stud through hole and is fixedly connected with the third nut through threads.

7. The battery pack according to claim 1, wherein the slave module (3) is fixedly connected to the slave module mounting plate (19) by a plurality of fourth bolts;

the bottom of a slave control mounting bracket (32) of the slave control module (3) is provided with a horizontal bending part (322) which is vertically bent rightwards;

a plurality of horizontal bending part through holes are arranged on the horizontal bending part (322) at equal intervals;

the secondary control module mounting plates (19) are respectively provided with a secondary control module mounting plate threaded mounting hole at positions corresponding to the through holes of each horizontal bending part;

and the fourth bolt passes through the horizontal bending part through hole on the horizontal bending part (322) and is fixedly connected with the control module mounting plate threaded mounting hole corresponding to the position.

8. The battery pack according to claim 1, wherein the bottom surface of the whole vehicle mounting welding bracket (16) is located on the same plane as the bottom surface of the main case (1);

the whole vehicle mounting and welding bracket (16) is fixedly connected with an external whole vehicle battery bracket through a plurality of fifth bolts;

a plurality of mounting holes of the whole vehicle battery bracket are arranged on the whole vehicle mounting welding bracket (16) at equal intervals;

a fifth nut (161) is welded on each whole car battery bracket mounting hole;

the external whole vehicle battery bracket is provided with a whole vehicle battery bracket butt joint hole at a position corresponding to a fifth nut (161) on the whole vehicle battery bracket mounting hole;

the fifth bolt sequentially passes through the corresponding whole vehicle battery bracket butt joint hole and the fifth nut (161) and is fixedly connected with the fifth nut (161) through threads;

and/or the left and right ends of the front and rear sides of the main box body (1) are respectively welded with connecting brackets (18);

each connecting bracket (18) is fixedly connected with a hanging lug (14) through a bolt.

9. The battery pack according to any one of claims 1 to 8, wherein a plurality of first rigid support plates (171) distributed transversely are welded to the bottom of the main casing (1);

a plurality of first rigid support plates (171) welded to a plurality of second rigid support plates (172) distributed at equal intervals;

the second rigid support plates (172) are longitudinally distributed and are vertically connected with the first rigid support plates (171);

the top surface of the first rigid supporting plate (171) is welded with the bottom of the main box body (1);

the transverse length of the first rigid support plate (171) is equal to the transverse length of the bottom of the main box body (1);

a plurality of round support plate holes are formed in the first rigid support plate (171) and the second rigid support plate (172);

the plurality of round support plate holes on the first rigid support plate (171) and the second rigid support plate (172) are distributed at equal intervals.

10. The battery pack according to claim 9, wherein the bottom panel of the main casing (1) is provided with main casing holes at positions corresponding to each of the support plate holes;

the shape and the size of the holes of the main box body are correspondingly matched with those of the holes of the supporting plate;

the shape of the main box body hole is round, and the diameter of the main box body hole is larger than the transverse width of the battery cell in the battery module (6) and smaller than the longitudinal width of the battery cell in the battery module (6).