CN217507488U - Square lithium ion battery and module - Google Patents
Square lithium ion battery and module Download PDFInfo
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- CN217507488U CN217507488U CN202221522437.8U CN202221522437U CN217507488U CN 217507488 U CN217507488 U CN 217507488U CN 202221522437 U CN202221522437 U CN 202221522437U CN 217507488 U CN217507488 U CN 217507488U
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Abstract
A square lithium ion battery and module, the square lithium ion battery includes the outer casing made of glass, the electric core placed in outer casing, cover plate installed on the upper opening of the outer casing, there are positive pole post, negative pole post, explosion-proof valve, liquid injection hole on the cover plate; during operation, when the gas inside the battery core expands to the pressure inside the battery core and reaches the specified value of the explosion-proof valve, the gas inside the battery core is discharged through the explosion-proof valve, and the deformation of the shell made of glass is smaller than the deformation of the shell made of aluminum. The utility model discloses an use the glass casing that is difficult for taking place elastic deformation, avoid battery appearance thickness to exceed standard, can effectively solve the super thick problem of product gas of electric core to solve the electric core problem that the space is not enough when in groups.
Description
Technical Field
The utility model belongs to new forms of energy lithium electricity field, concretely relates to lithium ion battery and module.
Background
The aluminum shell battery in the new energy lithium battery industry is the most common one, has more models and different sizes, and has a plurality of problems in the manufacturing process of the aluminum shell battery cell currently used, such as the deformation of the aluminum shell caused by the welding stress generated when the cover plate is welded with the aluminum shell, the excessive thickness of the aluminum shell battery cell caused by gas production tests such as formation and storage, and the direct influence on the whole pack size caused by the excessive thickness in grouping, however, the phenomenon occurs because the aluminum metal has elastoplasticity, the gas in the battery cell expands, and the excessive thickness is caused by the elastic deformation of the aluminum metal; on the other hand, in certain application environments there is a risk of corrosion.
At present, the above problems are ubiquitous in the industry, and some enterprises can reduce the available space inside to influence the design capacity of the cell in order to reduce the thickness of the cell and avoid increasing the strength of the aluminum shell.
Disclosure of Invention
The utility model aims at overcoming the above-mentioned not enough of prior art, and provide a square lithium ion battery and module, through using the glass shell that is difficult for taking place elastic deformation, avoid battery appearance thickness to exceed standard, can effectively solve the super thick problem of gas production of electric core to solve the electric core problem that the space is not enough when in groups.
The technical scheme of the utility model is that: the explosion-proof battery comprises a shell made of glass, a battery cell arranged in the shell and a cover plate arranged on an opening above the shell, wherein the cover plate is provided with a positive pole column, a negative pole column, an explosion-proof valve and a liquid injection hole; during operation, when the gas inside the battery core expands to the pressure inside the battery core and reaches the specified value of the explosion-proof valve, the gas inside the battery core is discharged through the explosion-proof valve, and the deformation of the shell made of glass is smaller than the deformation of the shell made of aluminum.
And the opening above the shell is hermetically connected with the cover plate by laser welding.
The shell made of glass is a transparent shell; when electrolyte is injected through the liquid injection hole, the internal liquid injection condition can be directly observed through the transparent shell, so that the conditions of more or less injection and internal core package infiltration can be avoided.
And scales for marking the height of the electrolyte are arranged on the shell.
A square lithium ion battery module comprises a plurality of square lithium ion battery modules, and when the square lithium ion battery module works, the thickness of the module is stable, and the internal space size of the module is stable because the battery shell is made of glass material and the thickness cannot be greatly changed due to gas generation in the battery;
the square lithium ion battery comprises a shell made of glass, a battery cell arranged in the shell and a cover plate arranged on the shell and provided with an opening, wherein the cover plate is provided with a positive pole column, a negative pole column, an explosion-proof valve and a liquid injection hole; during operation, when the gas inside the battery core expands to the pressure inside the battery core and reaches the specified value of the explosion-proof valve, the gas inside the battery core is discharged through the explosion-proof valve, and the deformation of the shell made of glass is smaller than the deformation of the shell made of aluminum.
The utility model has the advantages as follows:
1. the cover plate and the shell made of glass are welded by laser to form sealing connection, and the molecules of the two materials are tightly connected due to expansion caused by heat and contraction caused by cold during welding, so that the sealing connection is more reliable;
2. the high strength of the casing made of glass can reduce the difficulty of grouping caused by the increase of the thickness of the battery cell in the manufacturing process.
3. The shell is a transparent shell and can clearly monitor the internal state of the battery cell, and the excellent performance of the battery cell is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a square lithium ion battery of the present invention;
FIG. 2 is a schematic structural view of a cover plate;
FIG. 3 is one of the schematic views of the electrolyte level in the present invention;
fig. 4 is a second schematic diagram of the electrolyte level in the present invention.
Detailed Description
In fig. 1-2, the utility model discloses square lithium ion battery adopts shell 1 that glass made, and in shell 1 was arranged in to the electricity core, apron 2 adorned in shell 1 top opening part, and shell 1 top opening adopts laser welding sealing connection with apron 2, has anodal post 3, negative pole post 5, explosion-proof valve 4, annotates liquid hole 6 on the apron 2.
The situation of injecting liquid inside can be directly observed through the shell 1, so that the situations of injecting more (as shown in figure 3) or injecting less (as shown in figure 4) and infiltrating the inner core package can be avoided, the internal state of the battery cell can be clearly monitored, and the excellent performance of the battery cell is ensured. The shell 1 is made of glass, so that the insulativity is good, and the safety performance of the battery is improved.
During liquid injection, electrolyte is injected through the liquid injection hole 6, and the liquid level of the electrolyte corresponding to the specification of the battery is selected according to the specification of the battery.
With the shell that adopts aluminium to make and the utility model discloses the battery contrast explanation of the shell 1 that well glass made:
the during operation, when electric core inside gas inflation reached explosion-proof valve 4 specified values to electric core internal pressure, electric core inside gas discharged through explosion-proof valve 4, and the shell deformation that the shell 1 deformation that adopts glass to make is less than the shell deformation that adopts aluminium to make, and square lithium ion battery is when in groups, has guaranteed the utility model discloses a stability of the thickness of module can greatly limit reduce square lithium ion battery thickness, because of the shell 1 that glass made does not expand, dodges the space for the module structure.
Claims (5)
1. A square lithium ion battery is characterized in that: the battery comprises a shell (1) made of glass, a battery cell arranged in the shell (1), and a cover plate (2) arranged on the shell (1) and provided with an opening, wherein the cover plate (2) is provided with a positive pole column (3), a negative pole column (5), an explosion-proof valve (4) and a liquid injection hole (6); during operation, when the gas inside the battery core expands to the state that the internal pressure of the battery core reaches the specified value of the explosion-proof valve (4), the gas inside the battery core is discharged through the explosion-proof valve (4), and the deformation of the shell (1) made of glass is smaller than that of the shell made of aluminum.
2. The prismatic lithium ion battery of claim 1, wherein: the upper opening of the shell (1) is hermetically connected with the cover plate (2) by laser welding.
3. The square lithium ion battery of claim 1, wherein: the shell (1) made of glass is a transparent shell; when electrolyte is injected through the liquid injection hole, the internal liquid injection condition can be directly observed through the transparent shell, so that the conditions of more or less injection and internal core package infiltration can be avoided.
4. The square lithium ion battery of claim 3, wherein: the shell (1) is provided with scales for marking the height of the electrolyte.
5. A square lithium ion battery module is characterized in that: a module comprising a plurality of prismatic lithium ion cells according to any of claims 1 to 4, the thickness of the module being stable in operation;
the square lithium ion battery comprises a shell (1) made of glass, a battery cell arranged in the shell (1), and a cover plate (2) arranged on an opening above the shell (1), wherein the cover plate (2) is provided with a positive pole column (3), a negative pole column (5), an explosion-proof valve (4) and a liquid injection hole; during operation, when the gas inside the battery core expands to the state that the internal pressure of the battery core reaches the specified value of the explosion-proof valve (4), the gas inside the battery core is discharged through the explosion-proof valve (4), and the deformation of the shell (1) made of glass is smaller than that of the shell made of aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221522437.8U CN217507488U (en) | 2022-06-17 | 2022-06-17 | Square lithium ion battery and module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221522437.8U CN217507488U (en) | 2022-06-17 | 2022-06-17 | Square lithium ion battery and module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217507488U true CN217507488U (en) | 2022-09-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221522437.8U Active CN217507488U (en) | 2022-06-17 | 2022-06-17 | Square lithium ion battery and module |
Country Status (1)
| Country | Link |
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| CN (1) | CN217507488U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117096511A (en) * | 2023-10-18 | 2023-11-21 | 蜂巢能源科技股份有限公司 | Battery cell, battery module and battery pack |
-
2022
- 2022-06-17 CN CN202221522437.8U patent/CN217507488U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117096511A (en) * | 2023-10-18 | 2023-11-21 | 蜂巢能源科技股份有限公司 | Battery cell, battery module and battery pack |
| CN117096511B (en) * | 2023-10-18 | 2024-01-12 | 蜂巢能源科技股份有限公司 | Battery cell, battery module and battery pack |
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