阅读说明：本技术 一种48v系统锂离子蓄电池模组 (48V system lithium ion battery module ) 是由 武昆 万亚坤 谢明树 李林茂 宋昱科 李桐 于 2019-08-31 设计创作，主要内容包括：本发明公开了一种48V系统锂离子电池模组,壳体前端面向上内收倾斜,前端盖后端面向上外延倾斜；前端盖上开有正、负极端子安装孔、信号接口安装孔、防爆阀安装孔和进、出水口安装孔；水冷板为U型水套,其前端下端伸出进、出水口,电芯模块前端伸出正、负极端子,留有信号接口安装口,安装有BMS；将水冷板包裹卡接固定在电芯模块的三面,将电芯模块和水冷板置于壳体内,再将前、后端盖固定在壳体的前、后端上；信号接口安装在信号接口安装口上；防爆阀安装在防爆阀安装孔上；正、负极端子和进、出水口分别穿越正、负极端子安装孔和进、出水口安装孔并密封固定。本发明散热均匀、散热性好、密封性好、装配简易。(The invention discloses a 48V system lithium ion battery module, wherein the front end surface of a shell is upwards and inwards inclined, and the rear end surface of a front end cover is upwards and outwards inclined; the front end cover is provided with a positive terminal mounting hole, a negative terminal mounting hole, a signal interface mounting hole, an explosion-proof valve mounting hole and a water inlet and outlet mounting hole; the water cooling plate is a U-shaped water jacket, the lower end of the front end of the water cooling plate extends out of the water inlet and the water outlet, the front end of the battery cell module extends out of the positive terminal and the negative terminal, a signal interface mounting port is reserved, and the BMS is mounted; wrapping and clamping the water cooling plates on three surfaces of the battery cell module, placing the battery cell module and the water cooling plates in the shell, and fixing the front end cover and the rear end cover on the front end and the rear end of the shell; the signal interface is arranged on the signal interface mounting port; the explosion-proof valve is arranged on the explosion-proof valve mounting hole; the positive and negative terminals, the water inlet and the water outlet respectively penetrate through the positive and negative terminal mounting holes and the water inlet and water outlet mounting holes and are sealed and fixed. The invention has the advantages of uniform heat dissipation, good sealing performance and simple and easy assembly.)

1. A48V system lithium ion battery module comprises a battery cell module, a box body, a BMS, a water cooling plate and a signal interface; the method is characterized in that:

the box body comprises a shell, a front end cover and a rear end cover; the front end surface of the shell is upwards, inwards and obliquely inclined; the rear end face of the front end cover extends upwards and inclines outwards and is just matched with the front end face of the shell; the front end cover is provided with a positive terminal mounting hole, a negative terminal mounting hole, a signal interface mounting hole, an explosion-proof valve mounting hole and a water inlet and outlet mounting hole;

the water cooling plate is a U-shaped water jacket, the lower end of the front end of the water cooling plate extends out of the water inlet and the water outlet, and the water inlet and the water outlet are connected with a cooling liquid source when the water cooling plate is used;

the front end of the battery cell module extends out of the positive terminal and the negative terminal, a signal interface mounting port is reserved, and a BMS is mounted; wrapping and clamping the water cooling plate and fixing the water cooling plate on the rear, left and right surfaces of the battery cell module, placing the battery cell module and the water cooling plate in the shell, and fixing the front end cover and the rear end cover on the front end and the rear end of the shell; the signal interface is arranged on the signal interface mounting port through a signal interface mounting hole on the front end cover; the explosion-proof valve is arranged on the explosion-proof valve mounting hole; the positive and negative terminals, the water inlet and the water outlet respectively penetrate through the positive and negative terminal mounting holes and the water inlet and water outlet mounting holes and are sealed and fixed.

2. The 48V system lithium ion battery module of claim 1, wherein: the battery cell module comprises 12 single lithium battery cells, 6 aluminum plates, 7 pieces of foam cotton, a front adapter plate, a rear adapter plate, a copper bar, a clamping plate, a positive terminal and a negative terminal, wherein the front adapter plate and the rear adapter plate are made of plastic insulating materials; the shape of the clamping plate is matched with that of the electric core, a plurality of square holes are uniformly formed in the middle of the clamping plate, strap grooves are formed in two end parts in the length direction, positioning baffles are protruded from two sides of the rear ends of the two ends, steps are protruded from the front ends of the two ends, adapter plate fixing holes are formed in four corners of two end walls, and clamping plates which are bent vertically are symmetrically arranged in the middle positions of two sides in the width direction to form water-cooling plate clamp grooves; two sides of the aluminum plate in the width direction are vertically bent upwards; the two ends of the battery cell in the length direction are provided with pre-bent lugs; the front rotary joint plate is provided with 12 front lug connecting holes, a front insulation boss is protruded between two front lug connecting holes which are not connected with each other, a front copper bar groove is arranged between the two front lug connecting holes which are connected with each other, the upper end and the lower end of the front rotary joint plate are respectively provided with a negative copper bar groove and a positive copper bar groove, and four corners of the front rotary joint plate are provided with BMS fixing columns and front rotary joint plate fixing holes; the rear adapter plate is provided with 12 rear lug connecting holes, a rear insulating boss protrudes between two rear lug connecting holes which are not connected with each other, a rear copper bar groove is arranged between the two rear lug connecting holes which are connected with each other, and rear adapter plate fixing holes are arranged at four corners of the rear adapter plate; the clamping plate of the lower clamping plate is upward, the foam cotton, the cell, the aluminum plate, the cell, the foam cotton … …, the cell, the aluminum plate, the cell, the foam cotton and the upper clamping plate are sequentially arranged on the clamping plate, the clamping plate of the upper clamping plate is downward, a binding band is used for binding and fixing through a binding band groove on the upper clamping plate and a binding band groove on the lower clamping plate, the upper clamping plate, the lower clamping plate, the foam cotton, the cell and the aluminum plate are clamped and fixed by a front adapter plate and a rear adapter plate, lugs of the cell respectively penetrate through a front lug connecting hole and a rear lug connecting hole, and after bending and correction, the lugs of the cell are welded and fixed through a copper bar and a positive copper bar and; after the positive and negative copper bars are connected with the BMS, the positive and negative terminals are fixedly connected through the copper bars, and the BMS is fixedly installed on the front rotary connecting plate; heat-conducting glue is coated between the battery cell and the aluminum plates, and the back, the left and the right of each aluminum plate are in contact with the water cooling plate.

3. The 48V system lithium ion battery module of claim 1 or 2, wherein: the shell and the rear end cover are made of aluminum materials with heat treatment on the surfaces, and ribs are arranged on the upper end surface, the left end surface and the right end surface of the shell; the front end cover material is PA 66.

4. The 48V system lithium ion battery module of claim 3, wherein: the front end face of the shell is upwardly and inwardly inclined by 70 degrees, and the front end cover is upwardly and outwardly inclined by 70 degrees.

5. The 48V system lithium ion battery module of claim 4, wherein: the water cooling plate is made of an aluminum plate.

6. The 48V system lithium ion battery module of claim 1 or 2, wherein: the front end face of the shell is upwardly and inwardly inclined by 70 degrees, and the front end cover is upwardly and outwardly inclined by 70 degrees.

7. The 48V system lithium ion battery module of claim 6, wherein: the water cooling plate is made of an aluminum plate.

8. The 48V system lithium ion battery module of claim 3, wherein: the water cooling plate is made of an aluminum plate.

9. The 48V system lithium ion battery module of claim 1 or 2, wherein: the water cooling plate is made of an aluminum plate.

Technical Field

The invention relates to a storage battery module, in particular to a 48V system lithium ion battery module.

Background

In recent years, 48V has become a popular word in the automotive world in our country. In the field of hybrid power systems, start-stop devices, various electronic devices and automobiles with various technical breaks, compared with the traditional 12V electrical system, the 48V electrical system can not only effectively improve the power of a motor, but also efficiently recover the braking energy of the automobile, provide more power for more and more electronic loads required in the automobile and improve the oil saving efficiency by 10-15%. However, the technical problem that the discharge current generated at the moment of starting and energy recovery of a 48V battery vehicle and the charge current required to be received are large and generally reach 500A within 3 seconds is solved, so that the high-power charge and discharge inevitably causes the temperature of the battery to rise suddenly. The ideal working temperature range of the lithium ion battery is 20 ℃ to 45 ℃, and the battery pack can easily exceed the upper temperature limit during the high-power charging and discharging. And because the arrangement of the automobile battery pack is dense, the automobile battery pack is often placed in an automobile, so that the battery heating is more serious. In order to ensure reasonable use and service life of the battery and consider driving safety, a reasonable cooling design is very needed to ensure that the battery pack works in a reasonable temperature range. In addition, if the lithium ion power battery pack is operated under the environment conditions that thermal loss is not allowed to be divided, such as thermal insulation or high temperature, the temperature of the battery pack is obviously increased or the temperature difference between the monomers is obvious, and even a thermal runaway phenomenon can be generated due to overhigh temperature, so that the cycle life and the use safety of the battery pack are influenced, and therefore, the lithium ion power battery pack needs to be subjected to heat dissipation design.

At present, most 48V electric systems adopt a natural cooling or air cooling mode to dissipate heat of batteries, but the two modes have low efficiency, uneven heat dissipation and difficult dust and water prevention, and the heat dissipation effect is difficult to ensure in hot summer.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provide a 48V system lithium ion battery module which has the advantages of uniform heat dissipation, good sealing performance and simple and easy assembly.

In order to achieve the purpose, the technical solution of the invention is as follows: A48V system lithium ion battery module comprises a battery cell module, a box body, a BMS, a water cooling plate and a signal interface;

the box body comprises a shell, a front end cover and a rear end cover; the front end surface of the shell is upwards, inwards and obliquely inclined; the rear end face of the front end cover extends upwards and inclines outwards and is just matched with the front end face of the shell; the front end cover is provided with a positive terminal mounting hole, a negative terminal mounting hole, a signal interface mounting hole, an explosion-proof valve mounting hole and a water inlet and outlet mounting hole;

the water cooling plate is a U-shaped water jacket, the lower end of the front end of the water cooling plate extends out of the water inlet and the water outlet, and the water inlet and the water outlet are connected with a cooling liquid source when the water cooling plate is used;

the front end of the battery cell module extends out of the positive terminal and the negative terminal, a signal interface mounting port is reserved, and a BMS is mounted; wrapping and clamping the water cooling plate and fixing the water cooling plate on the rear, left and right surfaces of the battery cell module, placing the battery cell module and the water cooling plate in the shell, and fixing the front end cover and the rear end cover on the front end and the rear end of the shell; the signal interface is arranged on the signal interface mounting port through a signal interface mounting hole on the front end cover; the explosion-proof valve is arranged on the explosion-proof valve mounting hole; the positive and negative terminals, the water inlet and the water outlet respectively penetrate through the positive and negative terminal mounting holes and the water inlet and water outlet mounting holes and are sealed and fixed.

Preferably, the shell and the rear end cover are made of aluminum materials with heat treatment on the surfaces, and ribs are arranged on the upper end surface, the left end surface and the right end surface of the shell to increase the strength and enhance the heat dissipation function; the front end cover is made of PA66, so that the installation of the positive and negative terminals is facilitated, and the insulation effect is achieved.

Further preferably, the front end face of the shell is inclined inward and upward by 70 degrees, and the front end cover is inclined outward and outward by 70 degrees.

Further preferably, the water cooling plate is made of an aluminum plate, and is light in material and high in heat conductivity coefficient.

Further preferably, the battery cell module comprises 12 single lithium battery cells, 6 aluminum plates, 7 pieces of foam cotton, a front adapter plate and a rear adapter plate made of plastic insulating materials, a copper bar, a clamping plate, a positive terminal and a negative terminal; the shape of the clamping plate is matched with that of the electric core, a plurality of square holes are uniformly formed in the middle of the clamping plate, strap grooves are formed in two end parts in the length direction, positioning baffles are protruded from two sides of the rear ends of the two ends, steps are protruded from the front ends of the two ends, adapter plate fixing holes are formed in four corners of two end walls, and clamping plates which are bent vertically are symmetrically arranged in the middle positions of two sides in the width direction to form water-cooling plate clamp grooves; two sides of the aluminum plate in the width direction are vertically bent upwards; the two ends of the battery cell in the length direction are provided with pre-bent lugs; the front rotary joint plate is provided with 12 front lug connecting holes, a front insulation boss is protruded between two front lug connecting holes which are not connected with each other, a front copper bar groove is arranged between the two front lug connecting holes which are connected with each other, the upper end and the lower end of the front rotary joint plate are respectively provided with a negative copper bar groove and a positive copper bar groove, and four corners of the front rotary joint plate are provided with BMS fixing columns and front rotary joint plate fixing holes; the rear adapter plate is provided with 12 rear lug connecting holes, a rear insulating boss protrudes between two rear lug connecting holes which are not connected with each other, a rear copper bar groove is arranged between the two rear lug connecting holes which are connected with each other, and rear adapter plate fixing holes are arranged at four corners of the rear adapter plate; the clamping plate of the lower clamping plate is upward, the foam cotton, the cell, the aluminum plate, the cell, the foam cotton … …, the cell, the aluminum plate, the cell, the foam cotton and the upper clamping plate are sequentially arranged on the clamping plate, the clamping plate of the upper clamping plate is downward, a binding band is used for binding and fixing through a binding band groove on the upper clamping plate and a binding band groove on the lower clamping plate, the upper clamping plate, the lower clamping plate, the foam cotton, the cell and the aluminum plate are clamped and fixed by a front adapter plate and a rear adapter plate, lugs of the cell respectively penetrate through a front lug connecting hole and a rear lug connecting hole, and after bending and correction, the lugs of the cell are welded and fixed through a copper bar and a positive copper bar and; after the positive and negative copper bars are connected with the BMS, the positive and negative terminals are fixedly connected through the copper bars, and the BMS is fixedly installed on the front rotary connecting plate; heat-conducting glue is coated between the battery cell and the aluminum plates, and the back, the left and the right of each aluminum plate are in contact with the water cooling plate. In the structure, the aluminum plate is placed in the middle of the battery cell and is matched with the water cooling plate to take away heat generated by the battery cell; the foam is adhered among the battery cells, and a battery cell expansion space is reserved to play a role in insulation and buffering; preceding, back keysets and copper bar are installed in electric core utmost point ear department for the series-parallel connection between the electric core, simple structure, it is effectual to insulate between the electric core.

According to the invention, the water cooling system is additionally arranged in the shell, the two water cooling plates are abutted against the left inner wall and the right inner wall of the upper shell and the lower shell, the lithium ion battery cores are arranged in the two water cooling plates, heat generated by the battery cores is conducted to the surfaces of the water cooling plates through the aluminum plates, and the water cooling plates are cooled and radiated through the circulating flow of cooling liquid; the lithium ion battery core body is close to the two water cooling plates, the heat emitted by the lithium ion battery core body is quickly transmitted out, the heat dissipation is uniform, the heat dissipation performance is good, the defect of poor heat dissipation performance among battery monomers in the existing battery pack is overcome, the battery can be ensured to always work in a working temperature range, and the service life of the battery pack is prolonged; the invention has small volume, good sealing performance and simple and easy assembly. The foam has the effect of impact absorption and buffering, and the foam is added between the battery cores, so that the shock resistance and the impact resistance of the lithium ion battery are improved.

In a word, the invention realizes the requirements of omnibearing and balanced heat dissipation of the lithium ion battery module, improves the safety and reliability of the battery module in the using process, realizes the heat balance management in the water cooling process, and has the advantages of simplicity, practicability, reliability and prolonged service life.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of a cell module according to the present invention;

FIG. 3 is a schematic structural view of the housing of the present invention;

FIG. 4 is a schematic structural view of a front end cap according to the present invention;

FIG. 5 is a schematic view of the splint of the present invention;

FIG. 6 is a schematic structural view of a rear adapter plate according to the present invention;

FIG. 7 is a schematic structural view of a front adapter plate according to the present invention;

FIG. 8 is a schematic structural view of a water-cooled plate according to the present invention;

FIG. 9 is a schematic structural view of the foam of the present invention;

fig. 10 is a schematic structural view of a cell in the present invention;

FIG. 11 is a schematic view of the structure of an aluminum plate according to the present invention;

fig. 12 is a schematic structural view of the rear end cap of the present invention.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

As shown in fig. 1 to 12, the present embodiment includes a cell module, a case, a BMS 11, a water-cooling plate 5, and a signal interface 6. The box body comprises a shell 2 and front and rear end covers 1 and 3. The front end surface of the shell 2 is inclined upwards and inwards, and the inclined angle of upwards and inwards is preferably 70 degrees; the rear end face of the front end cover 1 is inclined outwards, preferably, the inclined angle outwards is 70 degrees, and the inclined angle is matched with the front end face of the shell 2. The front end cover 1 is provided with positive and negative terminal mounting holes 101 and 102, a signal interface mounting hole 103, an explosion-proof valve mounting hole 104, and water inlet and outlet mounting holes 105 and 106. The water cooling plate 5 is a U-shaped water jacket, and the lower end of the front end of the water cooling plate extends out of the water inlet and outlet 501 and 502. The front end of the battery cell module extends out of the positive and negative terminals 13 and 14, a signal interface mounting port is reserved, and the BMS 11 is mounted. The water cooling plate 5 is wrapped and clamped and fixed on the back, the left and the right surfaces of the battery cell module, the battery cell module and the water cooling plate 5 are arranged in the shell 2, and then the front end cover 1 and the rear end cover 3 are fixed on the front end and the rear end of the shell 2 through the front end cover fixing hole 107, the rear end cover fixing hole 301 and the shell fixing hole 201 respectively. The signal interface 6 is mounted on the signal interface mounting port through the signal interface mounting hole 103 on the front end cover 1. The explosion-proof valve 4 is mounted on the explosion-proof valve mounting hole 104. The positive and negative terminals 13, 14 and the water inlet and outlet 501, 502 respectively pass through the positive and negative terminal mounting holes 101, 102 and the water inlet and outlet mounting holes 105, 106 and are sealed and fixed by sealing rings. Preferably, ribs 202 are provided on the upper, left and right end faces of the housing 2. Preferably, the front end surface of the shell 2 is inclined inward by 70 degrees upward, and the front end cover is inclined outward by 70 degrees upward. The device is convenient to mount and fix. The water-cooling plate 5 is made of an aluminum plate.

Preferably, the cell module comprises 12 single lithium battery cells 16, 6 aluminum plates 15, 7 foam cotton 17, front and rear adapter plates 7, 8 made of plastic insulating materials, a copper bar 12, a clamping plate 9, and positive and negative terminals 13 and 14. Splint 9 shape and 16 phase-matches of electricity core, and evenly open there are a plurality of square holes in the middle of it, and length direction's both ends are opened and are had strap groove 902, and the both sides protrusion positioning baffle 904 of this both ends rear end, front end protrusion step have opened keysets fixed orifices 901 on the wall four corners of both ends respectively, and width direction's both sides intermediate position symmetry is provided with perpendicular curved joint board 903 down, forms water-cooling integrated circuit board hoop groove. Both sides of the aluminum plate 15 in the width direction are bent up perpendicularly to both side plates 151. The two ends of the battery cell 16 in the length direction are pre-bent tabs 161. The front connection plate 7 is provided with 12 front tab connection holes 707, a front insulation boss 706 is protruded between two front tab connection holes 707 which are not connected with each other, a front copper row groove 703 is arranged between the two front tab connection holes 707 which are connected with each other, the upper end and the lower end are respectively provided with a negative copper row groove 701 and a positive copper row groove 702, and four corners are provided with BMS fixing posts 704 and front connection plate fixing holes 705. The rear adapter plate 8 is provided with 12 rear tab connecting holes 804, a rear insulating boss 802 protrudes between the two rear tab connecting holes 804 which are not connected with each other, a rear copper bar groove 801 is arranged between the two rear tab connecting holes 804 which are connected with each other, and rear adapter plate fixing holes 803 are arranged at four corners. The clamping plate of the lower clamping plate 9 is upward, the foam 17, the battery cell 16, the aluminum plate 15, the battery cell 16, the foam 17 … …, the battery cell 16, the aluminum plate 15, the battery cell 16, the foam 17 and the upper clamping plate 9 are sequentially arranged on the clamping plate, the clamping plate of the upper clamping plate 9 is downward, the binding belt 10 is used for binding and fixing through a binding belt groove 902 on the upper clamping plate and the lower clamping plate 9, the front and rear adapter plates 7 and 8 are used for clamping and fixing the upper clamping plate and the lower clamping plate 9, the foam 17, the battery cells 16 and the aluminum plate 15, each battery cell lug respectively penetrates through each front lug connecting hole 707 and each rear lug connecting hole 804, the copper bars and the positive copper bars and the negative copper bars are welded and fixed after bending correction, the series electric connection of the battery cells 16 is ensured, and each copper bar is positioned. Just, behind negative pole copper bar connection BMS 11, rethread copper bar 12 connection is fixed just, negative terminal 13 and 14, BMS 11 installation is fixed to preceding fishplate bar 7 on. Heat-conducting glue is coated between the battery cell 16 and the aluminum plate 15, and the rear surface, the left surface and the right surface of each aluminum plate 15 are in contact with the water cooling plate 5.

The above embodiments are preferred and illustrative only, and equivalent technical modifications may be made by those skilled in the art based on the description of the patent, which are within the scope of the patent.