CN217903236U - High low temperature groove of normal position battery and inflation detecting system - Google Patents

Abstract

The utility model discloses an in-situ battery high-low temperature tank and an expansion detection system, wherein the expansion detection system comprises a high-low temperature tank, a temperature detection module, a temperature control device, a charging and discharging machine and an expansion detector; the high-low temperature tank comprises a tank body and a cover plate, a groove matched with a battery to be tested is formed in the tank body, a charging and discharging lug transfer point is arranged on the outer side of the tank body and comprises an anode charging and discharging lug transfer point and a cathode charging and discharging lug transfer point, the anode charging and discharging lug transfer point and the cathode charging and discharging lug transfer point are respectively communicated with an anode and a cathode in the tank body, a cavity is formed in the bottom of the tank body, and a cooling liquid inlet and a cooling liquid outlet which are respectively communicated with the cavity are formed in the outer side of the tank body. The utility model discloses simple structure has realized when charging and discharging under different temperature environment to the battery, to the test of inflation volume and bulging force.

Description

High low temperature groove of normal position battery and inflation detecting system

Technical Field

The utility model relates to a battery inflation detection device technical field, in particular to high low temperature groove of normal position battery and inflation detecting system.

Background

With the development of electric automobiles, the core battery test of the electric automobiles becomes more important, and lithium batteries, which are important components of the electric automobile batteries, have higher requirements on the safety performance of the lithium ion batteries. During charging and discharging of a lithium ion battery, intercalation and deintercalation of lithium ions in an electrode active material causes the battery to expand and contract. Ideally, the volume change of the material during insertion and extraction should be reversible. However, in practical situations, a part of lithium ions can not be completely extracted from the anode due to the change of the battery balance, the lithium ion extraction process can cause the volume expansion and shrinkage of the electrode material, and the battery is internally accompanied by gas generation and heat generation phenomena, which can cause the deformation of the whole battery, and the deformation is mainly in the thickness direction. Along with the popularization of electric automobiles, the lithium ion battery is required to be adaptable to the environmental temperatures of different regions in the use process; the temperature can influence the power performance of the lithium ion battery, the occurrence of side reactions can be aggravated by overhigh temperature, the safety performance of the battery can be influenced by lithium precipitation of a negative electrode due to overlow temperature, and the current equipment can only test the expansion condition of the battery at normal temperature and cannot simulate the use of the battery in a specific environment.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model provides a high low temperature groove of normal position battery and inflation detecting system, design high low temperature groove, examine time measuring at the inflation, arrange the battery in the cell body, later the apron through inflation detection device cooperation design is to placing the battery in the cell body and expand and detect, high low temperature inslot portion is equipped with the cavity for input coolant liquid realizes inslot high temperature or low temperature environment, the use of simulation battery in different temperature environment, the realization is under the different temperature condition, battery to in the charge-discharge carries out the inflation volume and the expansibility tests.

The utility model discloses a technical scheme be: the in-situ battery high-low temperature groove comprises a groove body and a cover plate, wherein a groove matched with a battery to be tested is formed in the groove body, the cover plate is matched with the groove, and the cover plate can freely move in the depth direction of the groove; the cell body outside is equipped with charge and discharge utmost point ear switching point, including anodal charge and discharge utmost point ear switching point and negative pole charge and discharge utmost point ear switching point, and respectively with the anodal and the negative pole intercommunication of the battery that awaits measuring, the cell body bottom is equipped with the cavity, the cell body outside be equipped with coolant liquid entry and coolant liquid export respectively with the cavity intercommunication.

Further, the cover plate is a solid alumina ceramic plate with a cubic structure, the area of the cover plate is slightly smaller than the groove, and the thickness of the cover plate is larger than the depth of the groove.

The cover plate mainly plays a role in sealing and transmitting battery expansion information, and at least part of the cover plate protrudes out of the groove after the cover plate is placed on a battery to be tested.

Furthermore, the cooling liquid inlet and the cooling liquid outlet are arranged on the same side face of the groove body.

Furthermore, the cooling liquid inlet and the cooling liquid outlet are respectively arranged on two opposite side surfaces of the tank body.

The utility model also provides an in-situ battery expansion detection system, which comprises the high-low temperature tank, the temperature detection module, the temperature control equipment, the charge-discharge machine and the expansion detector;

the expansion detector is provided with a detection ceramic plate for detection, a displacement sensor is arranged on the detection ceramic plate, and the detection ceramic plate is placed above the cover plate;

the temperature detection module is arranged on the inner wall of the groove and used for detecting the temperature in the groove and outputting the temperature, and the cooling liquid inlet and the cooling liquid outlet are communicated with the cooling liquid circulating system;

the temperature control equipment is connected with the temperature detection module and a valve on a pipeline connecting a cooling liquid inlet and a cooling liquid outlet;

and the positive electrode and the negative electrode of the charging and discharging machine are respectively connected with the positive electrode charging and discharging lug switching point and the negative electrode charging and discharging lug switching point.

The utility model has the advantages that:

the utility model discloses an inside has high low temperature groove of cavity, and the cavity passes through the coolant liquid entry and exports the coolant liquid circulation system of founding, provides the high low temperature environment of recess through the coolant liquid, will wait to detect the battery and place in the recess, is connected with the charging and discharging machine through charging and discharging utmost point ear switching point, has realized that the simulation battery carries out charge and discharge under high low temperature environment, and the apron is placed and is waiting to detect the battery top, carries out the inflation detection of battery when different temperatures charge and discharge through apron and ceramic plate, the utility model discloses simple structure also is convenient for expand current normal position dilatometer of collocation and uses based on this structure.

Drawings

Fig. 1 is a schematic view of the high and low temperature tank structure of the present invention;

fig. 2 is a schematic structural diagram of the high-low temperature tank under test.

Description of reference numerals: the device comprises a detection ceramic plate 1, a cover plate 2, a groove 3, a cooling liquid outlet 4, a cooling liquid inlet 5, a tank body 6, a negative electrode charging and discharging lug switching point 7 and a positive electrode charging and discharging lug switching point 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Embodiment 1 of the utility model provides an in-situ battery high-low temperature trough, as shown in fig. 1, including a trough body 6 and a cover plate 2, a groove 3 adapted to a battery to be tested is arranged inside the trough body 6, the cover plate 2 is adapted to the groove 3, and the cover plate 2 can freely move in the depth direction of the groove 3; the cell body 6 outside is equipped with charge and discharge utmost point ear switching point, including anodal charge and discharge utmost point ear switching point 8 and negative pole charge and discharge utmost point ear switching point 7, and respectively with the anodal and the negative pole intercommunication of the battery that awaits measuring, the cell body 6 bottom is equipped with the cavity, the cell body 6 outside be equipped with coolant liquid entry 5 and coolant liquid outlet 4 respectively with the cavity intercommunication.

In this embodiment, apron 2 is the solid alumina ceramic plate that is the cube structure, 2 area slightly less than of apron is less than recess 3, the thickness sum of the thickness of apron 2 and the battery that awaits measuring is greater than the degree of depth of recess 3, promptly after apron 2 is placed on the battery, the part is salient recess 3.

The cover plate 2 mainly serves to seal and transmit battery swelling information, and at least partially protrudes out of the groove 3 when it is placed on the battery to be tested.

In this embodiment, the cooling liquid inlet 5 and the cooling liquid outlet 4 are disposed on the same side surface of the tank body 6, so as to facilitate circulation of cooling liquid in the cavity.

Example 2

Embodiment 2 of the utility model provides a high low temperature groove of normal position battery, it is shown to combine figure 1, and overall structure is based on above-mentioned embodiment 1, no longer repeated here.

In this embodiment, the cooling liquid inlet 5 and the cooling liquid outlet 4 are respectively disposed on two opposite side surfaces of the tank body 6, so that in a circulation process, a circulation flow of the cooling liquid is formed in the cavity, and a temperature difference at each position of the groove 3 where the battery is located is reduced.

Example 3

Embodiment 3 of the present invention provides an in-situ battery expansion detection system, which is shown in fig. 2 and includes the high-low temperature tank, the temperature detection module, the temperature control device, the charging and discharging machine, and the expansion detector described in embodiment 1 or 2 above;

the expansion detector is provided with a detection ceramic plate 1 for detection, a displacement sensor is arranged on the detection ceramic plate 1, and the detection ceramic plate 1 is placed above the cover plate 2;

the temperature detection module is arranged on the inner wall of the groove, detects the temperature of the groove 3 and outputs the temperature, and a cooling liquid inlet 5 and a cooling liquid outlet 4 of the high-low temperature groove are communicated with a cooling liquid circulating system to form a closed liquid circulating system;

the temperature control equipment is connected with the temperature detection module and a valve on a pipeline connecting the cooling liquid inlet 5 and the cooling liquid outlet 4;

and the positive electrode and the negative electrode of the charge and discharge machine are respectively connected with the positive electrode charge and discharge lug switching point 8 and the negative electrode charge and discharge lug switching point 7.

Based on the above structure, in this embodiment, the operation and use process of the system is as follows:

place the battery in high low temperature groove, place apron 2 on the battery again, give fixed pressure (200 pa) of battery, connect coolant liquid import and export pipe, required temperature has been set up, open temperature control equipment, treat the temperature and reach the requirement after, connect the machine of charging and discharging, charge and discharge the battery, charge and discharge in-process battery can the expansion contraction, make apron 2 upwards or displacement downwards, the displacement of apron 2 can make and detect ceramic plate 1 and produce the same displacement, it has displacement sensor to detect ceramic plate 1, can transmit displacement information to the output result in the expansion analysis appearance.

The cooling liquid can adopt heat conducting oil which provides wide working temperature, such as dimethyl silicon oil; because the whole liquid circulation is a closed system, no water vapor is absorbed at low temperature, and no oil mist is generated at high temperature; the system does not cause pressure rise due to high temperature during operation, and heat-conducting media are supplemented at low temperature, so that the temperature change of-40 ℃ to 200 ℃ can be realized by the same heat-conducting media of the same machine, the use of the battery in different temperature environments is simulated, and the test of the expansion amount and the expansion force during the charging and discharging of the battery in different environments is realized.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or direct or indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims (5)

1. The in-situ battery high-low temperature tank is characterized by comprising a tank body and a cover plate, wherein a groove matched with a battery to be tested is formed in the tank body, the cover plate is matched with the groove, and the cover plate can freely move in the depth direction of the groove; the cell body outside is equipped with charge and discharge utmost point ear switching point, including anodal charge and discharge utmost point ear switching point and negative pole charge and discharge utmost point ear switching point, and respectively with the anodal and the negative pole intercommunication of the battery that awaits measuring, the cell body bottom is equipped with the cavity, the cell body outside be equipped with coolant liquid entry and coolant liquid export respectively with the cavity intercommunication.

2. The in-situ battery high and low temperature well as claimed in claim 1, wherein the cover plate is a solid alumina ceramic plate with a cubic structure, the area of the cover plate is slightly smaller than the groove, and the thickness of the cover plate is larger than the depth of the groove.

3. The in-situ battery high and low temperature tank as claimed in claim 1, wherein the cooling liquid inlet and the cooling liquid outlet are provided on the same side of the tank body.

4. The in-situ battery high and low temperature tank as claimed in claim 1, wherein the coolant inlet and the coolant outlet are respectively disposed on two opposite sides of the tank body.

5. An in-situ battery expansion detection system, which is characterized by comprising the in-situ battery high-low temperature tank, a temperature detection module, a temperature control device, a charge-discharge machine and an expansion detector, wherein the in-situ battery high-low temperature tank is as claimed in any one of claims 1 to 4;

the expansion detector is provided with a detection ceramic plate for detection, a displacement sensor is arranged on the detection ceramic plate, and the detection ceramic plate is placed above the cover plate;

the temperature detection module is arranged on the inner wall of the groove and used for detecting the temperature in the groove and outputting the temperature, and the cooling liquid inlet and the cooling liquid outlet are communicated with the cooling liquid circulating system;

the temperature control equipment is connected with the temperature detection module and a valve on a pipeline connecting a cooling liquid inlet and a cooling liquid outlet;

and the positive electrode and the negative electrode of the charge and discharge machine are respectively connected with the positive electrode charge and discharge lug switching point and the negative electrode charge and discharge lug switching point.

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