CN106531912B

CN106531912B - Square battery module

Info

Publication number: CN106531912B
Application number: CN201510585634.2A
Authority: CN
Inventors: 王小龙; 邵迪迪; 黄奉安; 杨槐
Original assignee: Beijing Pride New Energy Battery Co Ltd
Current assignee: Beijing Pride New Energy Battery Co Ltd
Priority date: 2015-09-15
Filing date: 2015-09-15
Publication date: 2022-07-19
Anticipated expiration: 2035-09-15
Also published as: CN106531912A

Abstract

The invention discloses a square battery module, which comprises a plurality of square battery monomers, a plurality of battery conductive connecting sheets and a module frame, and is characterized in that the module frame comprises two module end plates and four module fixing angle steels; the module end plate is square dull and stereotyped, and four angles of square dull and stereotyped are provided with end plate riveting through-hole, the tip at module fixed angle steel both ends is provided with angle steel riveting through-hole, module fixed angle steel with the module end plate is connected through the riveted mode, and is a plurality of square battery monomer holds fixedly. The square battery module provided by the invention has the advantages of simple structure, convenience in carrying and mounting, high space utilization rate and strong universality, is suitable for large-scale production, and can improve the production efficiency and reduce the cost. The module has high impact resistance, good heat conductivity and safe electric circuit, and can effectively improve the working performance and the service life of the battery module and the whole battery system.

Description

Square battery module

Technical Field

The invention relates to the technical field of battery grouping, in particular to a square battery module.

Background

With the rapid development of the automobile industry, the problems of environmental pollution, energy shortage, resource exhaustion and the like brought by automobiles are more and more prominent. In order to maintain the sustainable development of national economy, protect human living environment and guarantee energy supply, governments of various countries do not pay huge money and invest a large amount of manpower and material resources, and various ways for solving the problems are researched. The electric automobile has good environmental protection performance, can protect the environment, can adjust the energy structure, relieve the energy shortage and guarantee the energy safety, and has become the consensus of governments and automobile industries of various countries for developing the electric automobile. The power battery system is a key core component of the electric automobile, and the performance and the cost are high, so that the large-scale popularization and application of the electric automobile are directly influenced.

In addition, the current power grid operation of China faces various challenges such as continuous increase of the highest power load, expansion of intermittent energy access ratio, limited peak regulation means and the like, and the energy storage battery system is used as an important component of the smart power grid, so that demand side management can be effectively realized, peak-valley difference between day and night is eliminated, and the power load is smoothed. The method not only can increase the operation efficiency of the power equipment and reduce the power supply cost, but also can promote the application of renewable energy sources, improve the operation stability of the system, adjust the frequency and compensate the load fluctuation.

However, the energy provided by a single battery is limited, and in order to meet the electric energy demand potential of an electric vehicle power battery system or a national grid energy storage battery system, a plurality of single batteries are necessarily connected in series and/or in parallel to form a group, and then the battery modules are connected in series and/or in parallel to achieve a certain voltage level and capacity level to meet the demand of people. The quality and efficiency of battery system grouping techniques will greatly affect the life and safety of the battery system to meet sufficient power requirements in a limited space.

At present, the battery module group in the trade is made and has the various problems such as the modularization degree is low, space utilization is low, electric circuit is mixed and disorderly, battery heat conduction is uneven, greatly reduced battery module and battery system's production efficiency and product quality, shortened battery system's life, also had great potential safety hazard simultaneously.

Disclosure of Invention

The invention aims to provide a square battery module which is simple in structure, convenient to carry and install, high in space utilization rate, strong in universality, suitable for large-scale and mechanical production, capable of improving production efficiency and reducing production cost. The module has high impact resistance, good thermal conductivity and safe electrical circuit, and can effectively improve the working performance and the service life of the battery module and the battery system.

The technical scheme is as follows:

the utility model provides a square battery module, includes a plurality of square battery monomer, a plurality of battery conductive connection piece and module frame, its characterized in that, the module frame includes two module end plates and four module fixed angle steel. The module end plate is square dull and stereotyped, and four angles of square dull and stereotyped set up end plate riveting through-hole, the tip at module fixed angle steel both ends is provided with angle steel riveting through-hole, module fixed angle steel with the module end plate is connected through riveted mode, will be a plurality of square battery monomer holds fixedly, as shown in fig. 1, fig. 2, fig. 9, fig. 10, fig. 11, fig. 17 and fig. 18.

The square battery single bodies are arranged and combined together according to design requirements and are arranged in the module frame, and the battery conductive connecting sheet is used for electrically connecting positive and negative electrodes of the square battery single bodies in a series and/or parallel connection mode according to the design requirements. The battery conductive connecting piece comprises a module output conductive connecting piece and a module grouped conductive connecting piece, wherein the module output conductive connecting piece is used for electrically connecting square battery monomers at two ends of the square battery module and is used as a positive output end and a negative output end of the square battery module. The module group conductive connection tabs electrically connect the square battery cells except for both ends of the square battery module, as shown in fig. 1, 11, and 18.

Furthermore, four corners of the square flat plate of the module end plate are provided with end plate connecting parts protruding towards one side of the square flat plate, and the end surface of each end plate connecting part is in an L shape (as shown in fig. 2 and 4) or in a mouth shape (as shown in fig. 5 and 6).

Further, the module end plate is "H" shape that upper and lower both ends border is sunken to the middle part, the border inwards curls respectively around the module end plate and forms the inside opening, other three confined square hollow column, the upper and lower terminal surface of square hollow column is sealed, the upper and lower terminal surface of square hollow column and the upper and lower tip of the outside side perpendicular with square flat board all are provided with end plate riveting through-hole, as shown in fig. 7, 8, 12 and 14.

Further, the module end plate outer side is provided with a bag-shaped cavity protruding outwards corresponding to the battery post position of the single square battery, the outer side wall of the bag-shaped cavity is recessed from the upper end to the middle to form a U-shaped opening, the square battery module further comprises a sheet-shaped post fixing pin recessed from the lower end to the middle, the post fixing pin is inserted into the bag-shaped cavity from top to bottom to fix the module output conductive connecting sheet on the module end plate side wall, as shown in fig. 9, fig. 10, fig. 12, fig. 13, fig. 14, fig. 17 and fig. 18.

The square battery module further comprises an upper module cover, the upper module cover is formed by splicing a plurality of top covers, the end face of each top cover is of an -shaped structure, and top cover fixing screw holes are formed in the edges of supporting legs at two sides of each top cover; two module fixing angle steels on the upper side of the module frame are welded with top cover fixing rings, and top cover fixing screw holes are connected with the top cover fixing rings through bolts to enable the top covers to be fixed on the module fixing angle steels, as shown in fig. 9, 15, 17 and 18. The module upper cover can effectively shelter from the free positive and negative electrodes of the square battery or the battery conductive connecting sheet, so that the insulating fault caused by exposure outside is avoided, and the electric shock hazard of production personnel is prevented.

Further, the top cover is provided with a collection line bayonet at the edge of the end face of the two ends different from the supporting legs at the two sides, as shown in fig. 9, 15, 17 and 18. The acquisition line card wire port can restrict fixedly the arrangement of the data information acquisition wire harness of the square battery module, and the wire harness is prevented from being extruded and worn in a mess to generate detection faults or short-circuit accidents.

Further, the module end plates are provided at outer lower ends thereof with outwardly protruding module mounting brackets provided with module mounting holes through which the prismatic battery modules can be fixed by bolts when they need to be fixed, as shown in fig. 8, 9, 12, 14, and 17.

Further, the module end panels are provided at their outer upper ends with outwardly projecting module carrying handles, as shown in fig. 8, 9, 12, 14 and 17.

Furthermore, heat conduction insulating plates are arranged on the bottom and the side faces of the square battery module and on one side, close to the square battery monomer, of the module end plate. Can with the heat that the square battery module during operation produced conducts the outside rapidly, balanced each simultaneously the free inside temperature of square battery promotes the working property and the life of square battery module.

The square battery spacer is positioned between two adjacent square battery monomers and is an elastic sheet made of a heat-conducting insulating material.

The square shape of the invention comprises a square shape and a rectangular shape.

The square battery module provided by the invention can conveniently arrange different numbers of square battery monomers into battery modules which are combined in series and parallel at will according to design requirements, has the advantages of simple structure, high space utilization rate, strong universality and convenient installation and transportation, is suitable for large-scale and mechanized production, can improve the grouped production efficiency of the battery module, and reduces the production cost. The module has good thermal conductivity and safe electric circuit, and can effectively improve the working performance and the service life of the battery module and the whole battery system.

Drawings

Fig. 1 is a schematic structural view of a prismatic battery module of embodiment 1;

FIG. 2 is a schematic structural view of a module frame of embodiment 1;

fig. 3 is a schematic structural view of the module fixing angle steel of embodiment 1;

FIG. 4 is a schematic view showing the structure of an end plate of the module of example 1;

FIG. 5 is a schematic view of the end plate of the module having a "square" end face of the end plate connection;

FIG. 6 is a schematic view of another module end plate with a "mouth" shaped end face of the end plate connection;

FIG. 7 is a schematic structural view of an "H" shaped module end plate;

FIG. 8 is a schematic structural view of an "H" shaped module end plate with a module holder and module carrying handles;

fig. 9 is a schematic structural view of a prismatic battery module of embodiment 2;

FIG. 10 is a schematic structural view of a module frame of embodiment 2;

fig. 11 is a schematic structural view of a prismatic battery module of example 2 with the module upper cover removed;

FIG. 12 is a schematic structural view of an end plate of the module of embodiment 2;

fig. 13 is a schematic structural view of the post fixing pin of example 2;

FIG. 14 is a schematic view showing an assembly structure of the module end plate, the module output conductive connecting piece and the pole fixing pin of example 2;

FIG. 15 is a schematic view of the structure of a top cover of embodiment 2;

Fig. 16 is a schematic structural view of the module fixing angle steel to which the top cover fixing ring is welded according to embodiment 2;

fig. 17 is a schematic structural view of a prismatic battery module of embodiment 3;

fig. 18 is an exploded view of a prismatic battery module according to example 3.

Wherein the reference numerals are as follows:

10 square battery module 11 square battery monomer 12 battery conductive connecting piece

121 module group conductive connecting sheet 122 module group output conductive connecting sheet 20 module group frame

21 module end plate 211 end plate connecting part 212 end plate riveting through hole

213 Square hollow column 214 Module mounting bracket 215 Module mounting hole

Module fixing angle steel for 216 module carrying handle 217 bag-shaped cavity 22

221 angle steel riveting through hole 222 top cover fixing ring 23 rivet

Top cover 2411 top cover fixing screw hole of 24 module top cover 241

2412 Square battery spacer with collecting line bayonet 25, pole fixing pin 26 and terminal

Detailed Description

Example 1

As shown in fig. 1 to 4, an example of a prismatic battery module is given.

As shown in fig. 1 to 4, the square battery module 10 of the present example includes a plurality of square battery cells 11, a plurality of battery conductive connection tabs 12 (including a module output conductive connection tab 122 and a module group conductive connection tab 121), and a module frame 20, and the module frame 20 includes two module end plates 21 and four module fixing angle steels 22. Module end plate 21 is square flat board, and square flat board four angles are provided with to the convex end plate connecting portion 211 in square flat board one side, and end plate connecting portion 211 outside side is provided with end plate riveting through-hole 212, and the tip at module fixed angle steel 22 both ends is provided with angle steel riveting through-hole 221, and module fixed angle steel 22 is connected with module end plate 21 through rivet 23 for the riveted mode, holds a plurality of square battery monomer 11 fixedly.

In the module end plate 21 of the prismatic battery module 10 of this example, the end surface of the end plate connecting portion 211 is L-shaped.

The plurality of square battery cells 11 are arranged and combined together according to design requirements, and the module output conductive connecting sheet 122 electrically connects the square battery cells 11 at the two ends of the square battery module 10 and serves as a positive and negative output end of the square battery module 10. The module group conductive connection tabs 121 electrically connect the square battery cells 11 except for the two ends of the square battery module 10.

The square battery module can conveniently arrange different numbers of square battery monomers into battery modules combined in series and parallel according to design requirements, and has the advantages of simple structure, high space utilization rate, strong universality and high impact resistance.

Example 2

As shown in fig. 9 to 16, another example of a prismatic battery module is given, and this example is different from example 1 in that:

the module end plate 21 of the square battery module 10 of this example is in an "H" shape in which the upper and lower end edges are recessed toward the middle, the front and rear edges of the module end plate 21 are respectively curled inward to form a square hollow column 213 having an inner-side opening and three other closed sides, the upper and lower end surfaces of the square hollow column 213 are closed, and the upper and lower end surfaces of the square hollow column 213 and the upper and lower end portions of the outer-side surface perpendicular to the square flat plate are provided with end plate rivet through holes 212, as shown in fig. 9, 10, 11, 12, and 14.

In this embodiment, a bag-shaped cavity 217 protruding outward is formed on the outer side of the module end plate 21 of the rectangular battery module 10 corresponding to the position of the battery post of the rectangular battery cell 11, the outer side wall of the bag-shaped cavity 217 is recessed from the upper end to the middle to form a U-shaped opening, the rectangular battery module 10 further includes a sheet-shaped post fixing pin 25 recessed from the lower end to the middle that is engaged with the bag-shaped cavity 217, and the post fixing pin 25 is inserted into the bag-shaped cavity 217 from top to bottom to fix the module output conductive connecting plate 122 to the side wall of the module end plate 21, as shown in fig. 9, 11, 12, 13, and 14.

In the module upper cover 24 of the prismatic battery module 10 of this example, the top cover 241 is provided with the collecting line mount 2412 at the edge of the end faces at both ends different from the supporting legs at both sides, as shown in fig. 9, 15, 17 and 18. The acquisition line card wire port can restrain the arrangement of the data information acquisition wire harness of the fixed square battery module 10, and the situation that the wire harness is subjected to extrusion abrasion in a mess to generate detection faults or short-circuit accidents is avoided.

In this example, the module end plate 21 is provided at the outer lower end with a module mounting bracket 214 protruding outward, and the module mounting bracket 214 is provided with a module mounting hole 215 through which the prismatic battery module 10 can be fixed by bolts when it is necessary to fix it, as shown in fig. 9, 11, 12, and 14.

In this example, the module end plate 21 is provided at its outer upper end with a module carrying handle 216 projecting outward to facilitate the carrying and assembling of the prismatic battery module 10 as necessary, as shown in fig. 9, 11, 12 and 14.

The prismatic battery module 10 of this example further includes a module upper cover 24, and the module upper cover 24 is formed by joining a plurality of top covers 241. The end surface of the top cover 241 is in a structure of '', and top cover fixing screw holes 2411 are arranged at the edges of the supporting feet at the two sides of the top cover 241. The two module fixing angle steels 22 of the module frame 20 located at the upper side are welded with the top cover fixing rings 222, and the top cover fixing screw holes 2411 are connected with the top cover fixing rings 222 through bolts to fix the top cover 241 on the module fixing angle steels 22, as shown in fig. 9, 10, 15 and 16. The module upper cover 24 can effectively shield the positive and negative electrodes of the square battery monomer 11 or the battery conductive connecting sheet 12, avoid exposing outside to cause insulation faults, and prevent production personnel from electric shock risks.

The square battery module that this example provided can conveniently arrange into the battery module of arbitrary series-parallel combination with different quantity of square battery monomer according to the design demand, and shock resistance is high, simple structure, and space utilization is high, and electric circuit safety, the commonality is strong, and installation and transport are convenient, are fit for scale and mechanized production, can improve the unitized production efficiency of battery module, reduction in production cost.

Example 3

As shown in fig. 17 and 18, another example of the prismatic battery module is given.

The prismatic battery module 10 of this embodiment further includes a plurality of prismatic battery spacers 26, the prismatic battery spacers 26 are located between two adjacent prismatic battery cells 11, and the prismatic battery spacers 26 are elastic sheets made of heat-conducting insulating materials.

In addition, other embodiments are also included, and a heat conducting and insulating plate or the like is provided on the bottom and/or side of the prismatic battery module 10 and on the side of the module end plate 21 close to the prismatic battery cell 11. Can conduct the outside rapidly with the heat that square battery module during operation produced, the free inside temperature of each square battery promotes simultaneously the working property and the life of square battery module.

The square battery module provided by the invention has the advantages of simple structure, convenience in carrying and mounting, high space utilization rate and strong universality, is suitable for large-scale and mechanized production, can improve the production efficiency and reduce the production cost. The module has high impact resistance, good thermal conductivity and safe electrical circuit, and can effectively improve the working performance and the service life of the battery module and the battery system.

Claims

1. A square battery module comprises a plurality of square battery monomers, a plurality of battery conductive connecting sheets and a module frame, and is characterized in that the module frame comprises two module end plates and four module fixing angle steels; the module end plate is a square flat plate, end plate riveting through holes are formed in four corners of the square flat plate, angle steel riveting through holes are formed in the end portions of two ends of the module fixing angle steel, the module fixing angle steel is connected with the module end plate in a riveting mode, and a plurality of square battery monomers are accommodated and fixed;

The square battery module also comprises an upper module cover, the upper module cover is formed by splicing a plurality of top covers, the end surface of each top cover is of an -shaped structure, and top cover fixing screw holes are formed in the edges of supporting legs at two sides of each top cover; a top cover fixing ring is welded on the two module fixing angle steels on the upper side of the module frame, and the top cover fixing screw holes are connected with the top cover fixing ring through bolts so that the top cover is fixed on the module fixing angle steels;

the top cover is provided with an acquisition line bayonet at the edge of the end surface of two ends different from the supporting legs at two sides;

the module end plate is "H" shape that both ends border is sunken to the middle part about for, the border inwards curls respectively around the module end plate and forms interior side opening, other three confined square hollow column, the upper and lower terminal surface of square hollow column is sealed, the upper and lower terminal surface of square hollow column and with the upper and lower tip of square dull and stereotyped vertically outside side all be provided with end plate riveting through-hole.

2. The prismatic battery module according to claim 1, wherein the module end plates are provided at four corners of the prismatic flat plate with end plate connection parts protruding toward one side of the prismatic flat plate, and the end surfaces of the end plate connection parts are "L" shaped or "mouth" shaped.

3. The square battery module according to claim 1, wherein a bag-shaped cavity protruding outward is formed in the outer side of the module end plate corresponding to the position of the battery post of the single square battery, the outer side wall of the bag-shaped cavity is recessed from the upper end to the middle to form a U-shaped opening, the square battery module further comprises a sheet-shaped post fixing pin recessed from the lower end to the middle, the post fixing pin is inserted into the bag-shaped cavity from top to bottom to fix the module output conductive connecting piece on the side wall of the module end plate.

4. The prismatic battery module according to claim 1, wherein the module end plate is provided at an outer lower end with an outwardly protruding module mounting bracket provided with a module mounting hole.

5. The prismatic battery module according to claim 1, wherein the module end plate is provided at an outer upper end thereof with a module carrying handle protruding outward.

6. The prismatic battery module according to claim 1, wherein the bottom and the side of the prismatic battery module and the side of the module end plate adjacent to the prismatic battery cell are provided with a heat conductive insulating plate.

7. The square battery module according to any one of claims 1 to 6, further comprising a plurality of square battery spacers, wherein the square battery spacers are located between two adjacent square battery cells, and the square battery spacers are elastic sheets made of a heat-conducting insulating material.