CN217589372U

CN217589372U - Square battery shell, square battery and large-capacity battery

Info

Publication number: CN217589372U
Application number: CN202221031439.7U
Authority: CN
Inventors: 韩晓宇; 雷政军; 张三学
Original assignee: Shaanxi Olympus Power Energy Co Ltd
Current assignee: Shaanxi Olympus Power Energy Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-10-14
Anticipated expiration: 2032-04-29

Abstract

The utility model relates to a square battery shell, square battery and large capacity battery belongs to battery technical field. The square battery case includes: an upper cover assembly; the battery shell is formed by enclosing the upper cover assembly and the shell body, and a liquid injection port is formed in one side of the shell body, which is far away from the upper cover assembly; the liquid injection assembly comprises an installation part, a connecting pipe and a control switch, the connecting pipe is fixed on the liquid injection port through the installation part, the connecting pipe is communicated with the interior of the shell through the liquid injection port, and the control switch is arranged on the connecting pipe so as to seal the battery shell; when electrolyte is injected from the outside of the shell to the inside through the electrolyte injection assembly, the control switch is switched on so that the electrolyte enters the inside of the shell. The utility model discloses set up on the square shell battery and dissolve the subassembly, simple structure, the installation of being convenient for can make a plurality of square shell batteries be in the electrolyte system of homogeneous, improves the performance and the yield of battery.

Description

Square battery shell, square battery and large-capacity battery

Technical Field

The utility model relates to a square shell battery technical field especially relates to a square battery shell, square battery and large capacity battery.

Background

The square battery of lithium cell maximum capacity on the existing market is 300Ah, and the cylinder battery of maximum capacity is not more than 100Ah, under the background of "carbon reaches the peak" and "carbon neutralization", the energy storage trade is expected to obtain the sufficient development, nevertheless receive the influence of battery capacity, the lithium cell need carry out the series-parallel connection of a plurality of batteries when the energy storage is used, make and connect spare and accessory parts numerous, the connection step is complicated, loaded down with trivial details, battery management system and wire rod, the quantity of battery box is very big, the energy storage cost is therefore high.

The square battery has the advantages of high packaging reliability, high system energy efficiency, simple structure, relatively convenient capacity expansion and the like, and the problem that how to form a large-capacity battery by connecting the square batteries in series is needed to be solved.

CN111599955A provides a no module class aluminum-shell battery module, and it arranges a plurality of aluminum-shell electricity core and constitutes electric core module, and the utmost point post of aluminum-shell electricity core is connected through the aluminium bar that converges, arranges electric core module in the casing, constitutes the battery module, arranges a plurality of battery modules in the battery box, constitutes the aluminum-shell battery. However, the invention does not solve the problems of stability and consistency of the battery after a plurality of square-shell batteries form the battery module.

CN212810407U provides a square aluminum-shell battery, and it shares a face that adjacent subsides and links together through the face that shares with the sealed space that every two square aluminum-shell batteries and apron are constituteed and has formed a disjunctor square aluminum-shell battery, and the simple battery stability and the uniformity problem after a plurality of square shell batteries constitute battery module that just connects every single battery are not solved equally.

Disclosure of Invention

In view of the above, it is desirable to provide a prismatic battery case, a battery and a large-capacity battery including the prismatic battery case, in which an electrolyte in the prismatic battery and an electrolyte in the large-capacity battery are made to flow through each other, so that a plurality of prismatic batteries are in a uniform electrolyte system, and the battery performance and the yield are improved.

The utility model provides a square battery shell, include:

an upper cover assembly;

the upper cover assembly and the shell body are enclosed to form the battery shell, and one side of the shell body, which is far away from the upper cover assembly, is provided with a liquid injection port; and

the liquid injection assembly comprises an installation part, a connecting pipe and a control switch, the connecting pipe is fixed on the liquid injection port through the installation part, the connecting pipe is communicated with the interior of the battery shell through the liquid injection port, and the control switch is arranged on the connecting pipe so as to seal the battery shell;

when electrolyte passes through annotate the liquid subassembly follow the outside internal injection of battery case, control switch opens to make electrolyte gets into inside the battery case.

Preferably, the liquid injection port is provided with an internal thread, and the mounting portion is provided with an external thread matched with the internal thread.

Preferably, the control switch is a mechanical valve and can be opened manually.

Preferably, the upper cover assembly further comprises an explosion venting port, and an explosion venting film is arranged at the explosion venting port to vent out smoke generated when the battery is out of thermal control.

The utility model also provides a square battery, including the aforesaid arbitrary square battery shell.

The utility model also provides a large capacity battery, including liquid storage pipe and above-mentioned square battery at least, the liquid storage pipe include main line and at least two with the branch road of main line intercommunication, the branch road with connecting pipe one-to-one fixed connection, when pouring into electrolyte into, control switch opens, in the liquid storage pipe electrolyte with in the square battery electrolyte circulates each other.

Preferably, an abutting piece is arranged between the connecting pipe and the branch pipe so as to communicate the connecting pipe and the branch pipe.

Preferably, the liquid storage pipe is further provided with a liquid injection component so as to inject the electrolyte.

Preferably, the liquid storage pipe is further provided with an explosion venting component so as to vent out smoke generated when the large-capacity battery is out of control due to heat.

Preferably, the explosion venting component is an explosion venting valve.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses a set up the notes liquid subassembly on square battery shell, the notes liquid subassembly is fixed in on the notes liquid mouth of battery shell, when the battery is in the natural state, control switch is closed, can seal the battery shell for the battery is kept apart from the external world; parallelly connected the constitution large capacity battery with a plurality of above-mentioned square batteries, when pouring into electrolyte into, control switch opens, and electrolyte flows in the square battery, makes electrolyte in the square battery and the electrolyte in the large capacity battery circulate each other to make a plurality of square batteries be in the electrolyte system of homogeneous, improve battery performance and yield, simple structure, the simple installation, the commonality is strong.

Drawings

Fig. 1 is a schematic structural diagram of a square battery according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of a square battery according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a large-capacity battery according to an embodiment of the present invention.

Reference numerals:

1-square battery, 11-upper cover component, 111-explosion venting port, 12-shell body, 13-liquid injection port, 14-liquid injection component, 141-installation part, 142-connecting pipe, 143-control switch, 2-liquid storage pipe and 21-liquid injection explosion venting valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

As shown in fig. 1 and fig. 2, the present embodiment shows a prismatic battery case, which includes an upper cover assembly 11, a case body 12 and a liquid injection assembly 14, wherein the upper cover assembly 11 and the case body 12 enclose to form the battery case, a side of the case body 12 away from the upper cover assembly 11 is provided with a liquid injection port 13, the liquid injection assembly 14 includes an installation part 141, a connection pipe 142 and a control switch 143, the connection pipe 142 is fixed on the liquid injection port 13 through the installation part 141, the connection pipe 142 is communicated with the inside of the battery case through the liquid injection port 13, and the control switch 143 is arranged on the connection pipe 142 to seal the battery case; when the electrolyte is injected from the outside to the inside of the battery case through the injection assembly 14, the control switch 143 is opened to allow the electrolyte to enter the inside of the case.

The liquid injection assembly is arranged on the square battery shell and is fixed on the liquid injection port of the battery shell, and when the battery is in a natural state, the control switch is closed, so that the battery shell can be sealed, and the interior of the battery is isolated from the exterior; when connecting a plurality of above-mentioned square batteries in parallel and forming the large capacity battery, pour into electrolyte into, control switch can manually be opened, and electrolyte flows in the square battery, makes the electrolyte in the square battery and the electrolyte in the large capacity battery circulate each other to make a plurality of square batteries be in the electrolyte system of homogeneous, improve battery performance and yield, simple structure, the simple installation, the commonality is strong.

Example 2

As shown in fig. 1 and fig. 2, the present embodiment shows a prismatic battery case, which includes an upper cover assembly 11, a case body 12 and a liquid injection assembly 14, wherein the upper cover assembly 11 and the case body 12 enclose to form the battery case, a side of the case body 12 away from the upper cover assembly 11 is provided with a liquid injection port 13, the liquid injection assembly 14 includes an installation part 141, a connection pipe 142 and a control switch 143, the connection pipe 142 is fixed on the liquid injection port 13 through the installation part 141, the connection pipe 142 is communicated with the inside of the battery case through the liquid injection port 13, and the control switch 143 is arranged on the connection pipe 142 to seal the battery case; when the electrolyte is injected from the outside to the inside of the case through the injection unit 14, the control switch 143 is a mechanical valve and can be manually opened to allow the electrolyte to enter the inside of the case.

Annotate liquid mouth 13 and be equipped with the internal thread, installation department 141 is equipped with internal thread fit's external screw thread, through installation department 141 and annotate liquid mouth 13 threaded connection, can will annotate liquid subassembly 14 fixed mounting in annotating liquid mouth 13 department, simple structure, simple to operate is swift.

The upper cover assembly 11 further comprises an explosion venting port 111, an explosion venting film is arranged at the explosion venting port 111, and when the battery is out of thermal control, the explosion venting film is broken, so that smoke generated when the battery is out of thermal control can be vented.

Example 3

This embodiment shows a prismatic battery including the prismatic battery case of any one of embodiments 1 to 3.

Example 4

As shown in fig. 3, this embodiment shows a large capacity battery, which includes a liquid storage tube 2 and at least two square batteries 1 of embodiment 4, the liquid storage tube 2 includes a main pipeline and at least two branches communicated with the main pipeline, the branches and the connecting tube 142 are fixedly connected in a one-to-one correspondence manner, when injecting electrolyte, the control switch 143 is a mechanical valve, and can be manually opened to make the electrolyte in the liquid storage tube 2 and the electrolyte in the square batteries 1 mutually circulate.

It should be noted that, when the electrolyte is injected, the control switch is turned on, and the electrolyte flows into the square battery, so that the electrolyte in the square battery and the electrolyte in the large-capacity battery are communicated with each other, and thus a plurality of square batteries are in a uniform electrolyte system, and the battery performance and the yield are improved.

Example 5

This embodiment shows a large capacity battery, including stock solution pipe 2 and square battery 1 in two at least embodiment 4, stock solution pipe 2 includes main line and two at least branch roads with the main line intercommunication, branch road and connecting pipe 142 one-to-one fixed connection, and when pouring into electrolyte into, control switch 143 is automatic to be opened, and electrolyte in the stock solution pipe 2 and the electrolyte in the square battery 1 circulate each other.

An interface member is provided between the connection pipe 142 and the branch to communicate the connection pipe 142 and the branch. In this embodiment, the interfacing part is the butt joint buckle, can be fixed with connecting pipe and branch road joint, improves the structural strength and the stability of junction.

The liquid storage pipe is also provided with a liquid injection part so as to inject electrolyte. In this embodiment, the liquid injection component is a liquid injection opening or a liquid injection valve, and can be externally connected with a liquid injection pipeline for injecting liquid.

The liquid storage pipe is also provided with an explosion venting component, and when the battery is out of thermal runaway, smoke generated when the large-capacity battery is out of thermal runaway can be vented. In this embodiment, the explosion venting component is an explosion venting valve.

It should be noted that the explosion venting component may be the same component as the liquid injection component, that is, the liquid injection explosion venting valve 21, as shown in fig. 3, which can achieve both the liquid injection function and the explosion venting function.

The above embodiments only represent several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A prismatic battery case, comprising:

an upper cover assembly;

2. A prismatic battery case according to claim 1, wherein the pouring port is provided with an internal thread, and the mounting portion is provided with an external thread that engages with the internal thread.

3. The prismatic battery case according to claim 1, wherein the control switch is a mechanical valve that can be manually opened.

4. The square battery shell as claimed in claim 1, wherein the upper cover assembly further comprises an explosion venting port, and an explosion venting film is arranged at the explosion venting port to vent out smoke generated when the battery is out of thermal runaway.

5. A prismatic battery comprising the prismatic battery case according to any one of claims 1 to 4.

6. A large-capacity battery is characterized by comprising a liquid storage pipe and at least two square batteries according to claim 5, wherein the liquid storage pipe comprises a main pipeline and at least two branches communicated with the main pipeline, the branches are fixedly connected with the connecting pipe in a one-to-one correspondence mode, when electrolyte is injected, the control switch is switched on, and the electrolyte in the liquid storage pipe and the electrolyte in the square batteries are communicated with each other.

7. A large capacity battery as set forth in claim 6, wherein a butt joint member is provided between the connection pipe and the branch passage to communicate the connection pipe and the branch passage.

8. A large-capacity battery as defined in claim 6, wherein a liquid injection part is further provided on the reservoir pipe to inject the electrolyte.

9. A large capacity battery as defined in claim 6, wherein the liquid storage pipe is further provided with an explosion venting member to vent out the fume generated when the large capacity battery is out of thermal runaway.

10. The large capacity battery as claimed in claim 9, wherein the explosion venting part is an explosion venting valve.