CN207320173U - A kind of rectangular cell with soakage function - Google Patents

Abstract

A square battery with a heat equalization function, comprising a pole, a connecting piece, a pole piece, an electrolyte and a battery casing, the electrolyte fills the battery casing, the electrodes are soaked in the electrolyte, the The pole is fixedly connected to the connecting piece, the connecting piece is fixedly connected to the pole piece, and the connecting piece is tightly connected to the battery casing; the battery casing includes a shell, a casing cooling cavity, and a casing cooling liquid, The casing cooling cavity is arranged inside the casing, the casing cooling liquid is filled in the casing cooling cavity, the inner wall of the casing is in contact with the electrolyte, and the casing is connected to the electrolyte and outside world. Compared with the prior art, the utility model greatly enhances the heat conduction performance of the battery case by setting the case cooling chamber and filling the case with case cooling liquid.

Description

A square battery with heat equalizing function

technical field

The utility model relates to the field of power battery heat dissipation, in particular to a square battery with a heat equalizing function.

Background technique

With the improvement of environmental protection awareness, as a clean energy source, power batteries have a wide range of applications. At the same time, the demand for electrical indicators such as power, capacity, and playback speed of power batteries is also rising. During the charging and discharging process of a battery cell, a reaction occurs between the pole piece and the electrolyte, and a rapid and massive conversion between chemical energy and electrical energy generates a large amount of heat during the process. The guidance and release of this heat not only affects the performance of the battery. Maximizing the use of electricity also affects the safety of electricity consumption, so there are currently many technical solutions for battery heat dissipation. However, these solutions generally assume a heat dissipation environment such as heat sinks outside the battery cell, but the heat is often accumulated in the pole. There is also a lot of heat in the electrolyte around the column and the pole piece, and the conventional aluminum shell cannot dissipate the heat ideally.

Utility model content

In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a battery solution with good heat dissipation effect and avoid heat accumulation inside the battery.

The technical scheme provided by the utility model is as follows:

A square battery with a heat equalization function, comprising a pole, a connecting piece, a pole piece, an electrolyte and a battery casing, the electrolyte fills the battery casing, the pole piece is soaked in the electrolyte, the The pole is fixedly connected to the connecting piece, the connecting piece is fixedly connected to the pole piece, and the connecting piece is sealed to the battery casing; the battery casing includes a shell, a casing cooling cavity, and a casing cooling liquid , the housing cooling chamber is arranged inside the housing, the housing cooling liquid is filled in the housing cooling chamber, the inner wall of the housing is in contact with the electrolyte, and the housing is connected to the electrolyte and the outside world.

Wherein, the housing cooling cavity includes a central cavity, a return capillary channel and at least two groups of distribution cavities, the central cavity is arranged in the middle of the housing, and the distribution cavities are arranged at the edge of the housing, The distribution cavity communicates with the central cavity, and the return capillary channel communicates with the distribution cavity and the central cavity.

On the basis of the above solution, the central cavity is arranged inside the casing, and the distribution cavity is arranged outside the casing.

Wherein, the connecting sheet includes a connecting sheet shell, a connecting sheet cavity and a connecting sheet heat pipe, the connecting sheet cavity is arranged inside the connecting sheet shell, and the connecting sheet heat pipe is arranged in the connecting sheet cavity, The connecting piece heat pipe is fixedly connected to the connecting piece shell, the connecting piece shell is fixedly connected to the pole post, and the connecting piece shell is connected to the pole piece.

Wherein, the pole includes a cylinder, a vacuum microchannel and a cooling liquid, the vacuum microchannel is arranged inside the pole, the cooling fluid fills the vacuum microchannel, and the cylinder and the connecting piece connected, the column communicates the connecting piece with the outside world.

On the basis of the above scheme, the vacuum microchannel includes a central channel and at least two groups of distribution channels, the central channel is arranged at the lower end of the cylinder, and at least two groups of the distribution channels are arranged at the upper end of the cylinder , the central channel communicates with the distribution channel, and the cooling liquid fills the central channel.

On the basis of the above solution, the central channel is arranged at the center of the cylinder.

On the basis of the above solution, the distribution channel is arranged outside the column.

Wherein, the connection piece is fixedly connected to the housing through thermal conductive glue.

Wherein, the casing cooling liquid is ethanol or acetone.

Compared with the prior art, the utility model greatly enhances the heat conduction performance of the battery case 4 by providing a case cooling chamber and filling the case with case cooling liquid, supplemented by a cooling fan and other simple means of ventilation, which can satisfy daily use Conditions, reduce the demand for complex cooling systems, simplify the structure of battery packs and battery boxes using this type of battery cell, and use the extra space to install more battery packs, which will greatly improve the power supply of this type of battery cell The energy that equipment can store and provide under the condition of the same mass or volume.

Description of drawings

Fig. 1 is a schematic diagram of the structure of a prismatic battery with a heat equalizing function.

Figure 2 is an enlarged view of part A of Figure 1

Fig. 3 is a top view section of the connecting piece.

Fig. 4 is a front view section of the battery case.

Fig. 5 is a schematic diagram of the structure of a battery case made by using a vapor chamber.

The reference signs are as follows:

1 pole, 101 column, 102 vacuum microchannel, 1021 central channel, 1022 distribution channel, 2 connecting piece 2, 201 connecting piece shell 201, 202 connecting piece heat pipe 202, 3 electrolyte, 4 battery shell 4, 401 shell 401, 402 shell cooling cavity 402, 4021 central cavity 4021, 4022 return capillary channel 4022, 4023 distribution cavity 4023.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figures 1 to 4, a square battery with a heat equalization function includes a pole 1, a connecting piece 2, a pole piece, an electrolyte 3 and a battery case 4, and the electrolyte 3 fills the battery case 4 , the pole piece is soaked in the electrolyte 3, the pole piece 1 is fixedly connected to the connecting piece 2, the connecting piece 2 is fixedly connected to the pole piece, and the connecting piece 2 is connected to the battery The casing 4 is hermetically connected; the battery casing 4 includes a casing 401, a casing cooling chamber 402 and casing cooling liquid, the casing cooling chamber 402 is arranged inside the casing 401, and the casing cooling liquid is filled in the casing for cooling. In the cavity 402, the inner wall of the housing 401 is in contact with the electrolyte 3, and the housing 401 connects the electrolyte 3 and the outside world.

Specifically, in the process of charging and discharging, heat is generated in the pole pieces and the nearby electrolyte 3, and part of the heat is transferred from the electrolyte 3 to the housing 401, and the housing in the housing cooling cavity 402 is cooled. It absorbs heat and vaporizes, and liquefies at the side of the housing 401 with a lower temperature, and conducts the heat quickly to the outside.

The advantage of this solution is that it greatly enhances the thermal conductivity of the battery casing 4, supplemented by simple means of ventilation such as cooling fans, it can meet the daily use conditions, reduce the need for complex cooling systems, and simplify the use of such battery cells The structure of battery packs and battery boxes allows more battery packs to be installed in the remaining space, which will greatly increase the energy that can be stored and provided by the power supply equipment of this kind of battery cell under the same mass or volume.

One embodiment is to use a heat chamber to cut into preset size boards, respectively as two long side boards, two short side boards and a lower cover board, and the two long side boards are respectively on the two short sides. The two side edges of the plate are connected by laser welding, and the four edges of the lower cover plate are connected to the bottoms of the two upper long side plates and the two short side plates respectively through laser welding, and the vapor chamber quickly The performance of heat conduction helps heat transfer from the electrolyte 3 to the outside world quickly.

Further, the housing cooling cavity 402 includes a central cavity 4021, a return capillary channel 4022 and at least two groups of distribution cavities 4023, the central cavity 4021 is arranged in the middle of the housing 401, and the distribution cavities 4023 are set At the edge of the housing 401 , the distribution cavity 4023 communicates with the central cavity 4021 , and the return capillary channel 4022 communicates with the distribution cavity 4023 and the central cavity 4021 .

Specifically, the casing cooling liquid is filled in the central cavity 4021, and the heat is transferred to the battery casing 4 through the electrolyte 3 and the connecting piece 2, and a large amount of heat is concentrated on the side of the casing close to the pole piece and pole 1. In the middle position, the casing cooling liquid absorbs a large amount of heat in the central cavity 4021 and volatilizes, and the gaseous casing cooling liquid rises to the distribution cavity 4023, releases heat and cools down, and the cooled liquid casing cooling liquid directly Return to the central cavity 4021 or flow back to the central cavity 4021 through the capillary channel.

The advantage of this solution is that a large amount of heat accumulated in the middle of the housing 401 close to the pole piece is distributed to the edge of the housing 401 to avoid heat accumulation and improve the heat dissipation effect.

Further, the central cavity 4021 is disposed inside the housing 401 , and the distribution cavity 4023 is disposed outside the housing 401 .

Specifically, the thinner part of the housing 401 communicates with the electrolyte 3 and the central cavity 4021, and the thinner part of the housing 401 communicates with the distribution chamber and the outside, and the heat is quickly transferred from the electrolyte 3 Conducted to the case coolant and rapidly from the case coolant to the environment.

The advantage of this solution is to improve the efficiency of heat transfer.

Further, the connection sheet 2 includes a connection sheet shell 201, a cavity of the connection sheet 2 and a connection sheet heat pipe 202, the cavity of the connection sheet 2 is arranged inside the connection sheet casing 201, and the connection sheet heat pipe 202 is arranged on In the cavity of the connecting piece 2, the connecting piece heat pipe 202 is fixedly connected to the connecting piece shell 201, the connecting piece shell 201 is fixedly connected to the pole 1, and the connecting piece shell 201 is connected to the pole chip connection.

Specifically, the heat release end of the connecting piece heat pipe 202 is arranged near the connection between the connecting piece housing 201 and the pole 1, and the heat absorbing end of the connecting piece heat pipe 202 is arranged at the connecting piece housing 201 In the vicinity of the junction with the pole piece, when the battery is charging and discharging, the heat is conducted from the pole piece and the electrolyte 3 to the connecting piece shell 201, and the heat-absorbing end in the connecting piece heat pipe 202 absorbs a large amount of heat. heat, the heat conduction medium in the connecting sheet heat pipe 202 vaporizes rapidly, takes away a large amount of heat and releases a large amount of heat at the heat release end of the connecting sheet heat pipe 202, and the released heat passes through the connecting sheet 2 and the The junction of pole 1 is conducted to said pole 1 and released to the outside world.

The advantage of this solution is that it overcomes the bottleneck of the connection piece 2 in the heat conduction process, so that the connection piece 2 simultaneously conducts a large amount of heat from the pole piece and the electrolyte 3 and transfers it to one end of the pole 1, and transfers it to the pole through the cooling liquid. The other end of the pole 1 is released to the outside world.

Further, the pole 1 includes a cylinder 101, a vacuum microchannel 102 and a cooling liquid, the vacuum microchannel 102 is arranged inside the pole 1, the cooling liquid fills the vacuum microchannel 102, the The cylinder 101 is connected to the connecting piece 2, and the cylinder 101 communicates the connecting piece 2 with the outside world.

Specifically, during the charging and discharging process of the battery, heat will be generated between the pole piece and the electrolyte 3, a part of the heat is transferred to the battery case 4 through the electrolyte 3 and dissipated, and a large amount of heat is transferred to the connecting piece 2 through the pole piece. Above, the connecting piece 2 conducts heat to one end of the pole 1. At this time, the liquid cooling liquid receives the heat transferred from the connecting piece 2 through the column 101, and the cooling liquid absorbs a large amount of The heat is volatilized, and the gaseous cooling liquid runs along the vacuum microchannel 102 , conducts heat to the other end of the column 101 , and dissipates it to the outside through the pole 1 .

The advantage of this solution is: by setting the vacuum microchannel 102, the heat is quickly transferred from one end of the pole 1 to the other end, the speed of heat transfer from the connecting piece 2 to the outside is improved, and the heat is avoided in the pole 1. The accumulation on the battery improves the charging and discharging effect of the battery, making it safer and more efficient.

Further, the vacuum microchannel 102 includes a central channel 1021 and at least two groups of distribution channels 1022, the central channel 1021 is arranged at the lower end of the column 101, and at least two groups of the distribution channels 1022 are arranged at the column 101 , the central channel 1021 communicates with the distribution channel 1022 , and the cooling liquid fills the central channel 1021 .

Specifically, when heat is transferred from the pole piece to the lower end of the pole column 1 through the connecting piece 2, the liquid coolant in the central channel 1021 absorbs a large amount of heat and volatilizes, and the gaseous coolant liter disperses. rise to multiple sets of distribution channels 1022 , and cool down in multiple sets of distribution channels 1022 to release heat.

The advantage of this solution is that the heat absorbed by the cooling liquid is evenly distributed to all directions of the pole 1 and released, so that the heat does not accumulate locally in the pole 1, and the efficiency of heat dissipation is improved.

Further, the central channel 1021 is set at the center of the cylinder 101 .

Specifically, the central channel 1021 is arranged at the center of the lower end of the pole 1, and the diameter of the central channel 1021 is larger than that of the distribution pipe. During the process of the pole 1, the heat is evenly transferred from all directions of the lower end of the pole 1 to the central channel 1021 .

The advantage of this solution is that the cooling liquid absorbs heat uniformly from all directions at the lower end of the pole 1, avoiding uneven distribution of heat at the lower end of the pole 1, and improving the effect of heat transfer.

Further, the distribution channel 1022 is arranged outside the cylinder 101 .

Specifically, the cooling liquid in the central channel 1021 absorbs heat and volatilizes, and the gaseous cooling liquid rises into the distribution channel 1022 and is transmitted to the outside through the column 101 .

The advantage of this solution is that the distribution channel 1022 is arranged outside the column 101, and a thinner part of the column 101 communicates the distribution channel 1022 with the outside, so that heat can be transferred to the outside more efficiently.

Further, the connection piece 2 is fixedly connected to the housing through thermal conductive glue.

The advantage of this solution is that it improves the heat conduction effect.

Further, the casing cooling liquid is ethanol or acetone.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (10)

1. A square battery with a heat-soaking function, characterized in that: comprise a pole, a connecting piece, a pole piece, an electrolyte and a battery case, the electrolyte fills the battery case, and the pole piece is soaked in the battery case In the electrolyte, the pole is fixedly connected to the connecting piece, the connecting piece is fixedly connected to the pole piece, and the connecting piece is sealed to the battery casing; the battery casing includes a shell, a shell Cooling cavity and shell cooling liquid, the shell cooling cavity is arranged inside the shell, the shell cooling liquid is filled in the shell cooling cavity, the inner wall of the shell is in contact with the electrolyte, the shell The body connects the electrolyte and the outside world. 2. A prismatic battery with heat equalizing function according to claim 1, characterized in that: said housing cooling cavity comprises a central cavity, a return capillary channel and at least two groups of distribution cavities, said central cavity Set in the middle of the casing, the distribution cavity is set on the edge of the casing, the distribution cavity communicates with the central cavity, and the return capillary channel communicates with the distribution cavity and the central cavity cavity. 3 . The square battery with heat equalizing function according to claim 2 , wherein the central cavity is arranged inside the casing, and the distribution cavity is arranged outside the casing. 4 . 4. A prismatic battery with heat equalizing function according to claim 1, characterized in that: the connecting piece comprises a connecting piece shell, a connecting piece cavity and a connecting piece heat pipe, and the connecting piece cavity is arranged at Inside the connecting piece shell, the connecting piece heat pipe is arranged in the connecting piece cavity, the connecting piece heat pipe is fixedly connected to the connecting piece shell, and the connecting piece shell is fixedly connected to the pole, so The connecting piece shell is connected with the pole pieces. 5. A prismatic battery with a heat equalizing function according to claim 1, characterized in that: the pole comprises a cylinder, a vacuum microchannel and a coolant, and the vacuum microchannel is arranged on the pole Inside, the cooling liquid fills the vacuum microchannel, the column is connected to the connection piece, and the column communicates the connection piece with the outside world. 6. A prismatic battery with heat equalizing function according to claim 5, characterized in that: said vacuum microchannel comprises a central channel and at least two groups of distribution channels, said central channel is arranged at the center of said cylinder At the lower end, at least two groups of the distribution channels are arranged at the upper end of the cylinder, the central channel communicates with the distribution channel, and the cooling liquid fills the central channel. 7. A prismatic battery with heat equalizing function according to claim 6, characterized in that: the central channel is arranged at the center of the cylinder. 8. A prismatic battery with heat equalizing function according to claim 6, characterized in that: the distribution channel is arranged outside the cylinder. 9 . The square battery with a heat equalizing function according to claim 1 , wherein the connecting piece is fixedly connected to the casing by a heat-conducting adhesive. 10 . 10. A prismatic battery with a heat equalizing function according to claim 1 or 2, characterized in that: the casing cooling liquid is ethanol or acetone.