CN217638033U

CN217638033U - Battery thermal load simulation device

Info

Publication number: CN217638033U
Application number: CN202221762942.XU
Authority: CN
Inventors: 武春晓; 王晓东
Original assignee: Onoff Electric Co ltd
Current assignee: Onoff Electric Co ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2022-10-21
Anticipated expiration: 2032-07-07

Abstract

The utility model provides a battery thermal load analogue means, battery thermal load analogue means includes the casing, generates heat board and heat transfer plate. The utility model provides a battery thermal load analogue means is provided with the board and the heat transfer plate of generating heat through the interval in proper order in casing inside, and the power of generating heat of the board that generates heat matches with reference to the power of generating heat of the inside electric core pole piece of battery for the power of generating heat of simulation pole piece. The coefficient of heat conductivity of heat transfer plate refers to the coefficient of heat conductivity of electric core diaphragm for the heat conduction state of simulation diaphragm, the shell of battery is referred to the material of casing, and battery thermal load analogue means in this application can heat the simulation to the board that generates heat according to the power that generates heat of the inside electric core pole piece of battery, and dispel the heat through heat transfer plate and casing, the heat dissipation condition that can effectual simulation battery. The test is convenient for the thermal management of the battery in the later stage, and the manufacturing period and the test cost of the battery sample are effectively reduced.

Description

Battery thermal load simulation device

Technical Field

The utility model belongs to the technical field of energy storage equipment, concretely relates to battery thermal load analogue means.

Background

With the popularization and application of new energy sources such as solar energy, wind energy and the like, an energy storage technology develops, and lithium batteries gradually become mainstream products for energy storage because of the advantages of higher energy, long service life, high rated voltage, high power bearing capacity, very low self-discharge rate, light weight, environmental protection, basically no water consumption in production and the like. However, since the overall performance of the lithium ion battery is sensitive to the working temperature, when the battery works at a high temperature for a long time, the power performance of the battery is reduced, the aging of the battery is accelerated, and even a fire disaster caused by thermal runaway occurs, so that the thermal management work of the lithium battery is important. At present, for the thermal test of the lithium battery, a sample actual measurement mode or a professional software simulation test mode is generally adopted. The actual measurement mode of the sample needs to manufacture a battery sample, and the manufacturing period of the battery sample is long and the manufacturing cost is high. Thereby increasing the cycle and cost of the lithium battery in the thermal test process.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a battery heat load analogue means aims at solving among the prior art in the heat management test process cycle long and problem with high costs.

In order to achieve the above object, the utility model adopts the following technical scheme: provided is a battery thermal load simulation device including:

the device comprises a shell, a shell and a clamping piece, wherein a cavity is arranged in the shell;

the heating plate is arranged in the cavity;

and the heat transfer plates are arranged in the cavity and are sequentially and alternately arranged in the cavity with the heating plates.

In one possible implementation, the housing includes:

the outer side of the first shell is provided with a first inserting plate;

the second shell is detachably connected with the first shell, and a first slot for accommodating the first plug-in board is formed in the outer side of the second shell;

a tightening assembly disposed between the first housing and the second housing for fixedly connecting the first housing with the second housing.

In a possible implementation manner, the number of the first insertion plates is multiple, a second insertion groove is formed between two adjacent first insertion plates, and a second insertion plate in sliding fit with the second insertion groove is formed between two adjacent first insertion grooves.

In one possible implementation, the tightening assembly comprises:

the connecting rod penetrates through the second shell and is provided with an external thread;

and the fixed block is fixedly arranged inside the first shell and is in threaded connection with the connecting rod.

In a possible implementation manner, the number of the fixing blocks is multiple, the fixing blocks are arranged in the first shell in an enclosing manner, and the heating plate and the heat transfer plate are provided with sliding chutes in sliding fit with the fixing blocks.

In a possible implementation manner, the cross section of the fixing block along the direction perpendicular to the axis of the connecting rod is of a square structure.

In a possible implementation manner, a first temperature sensor is embedded in the heating plate, and a second temperature sensor is installed on the outer side of the shell.

In a possible implementation manner, the number of the first temperature sensors and the number of the second temperature sensors are multiple and are respectively and uniformly distributed on the heating plate and the shell.

In one possible implementation, the heat generating plate includes:

a heat conducting plate;

and the resistance wires are embedded in the heat conducting plate and are uniformly distributed in the heat conducting plate.

In one possible realization mode, a thin film with the same thermal conductivity coefficient as that of a blue film on the outer side of the battery is pasted on the outer side of the shell.

Compared with the prior art, the scheme shown in the embodiment of the application has the advantages that the shell is arranged, the cavity is arranged inside the shell, the heating plates and the heat transfer plates are arranged inside the cavity, the number of the heating plates and the number of the heat transfer plates are multiple, and the multiple heating plates and the heat transfer plates are sequentially and alternately arranged. The heating plate can simulate the heating power of the battery cell pole piece to generate heat. The heating power of the heating plate is matched with the heating power of the battery core pole piece in the battery in reference, and the heating power is used for simulating the heating power of the pole piece. The thermal conductivity of heat transfer plate refers to the thermal conductivity of electric core diaphragm for the heat conduction state of simulation diaphragm, the shell of battery is referred to the material of casing, and battery thermal load analogue means in this application can make the board that generates heat simulate according to the power that generates heat of the inside electric core pole piece of battery, and dispel the heat through heat transfer plate and casing, the heat dissipation condition that can effectual simulation battery. And can adjust the heating power of the board that generates heat according to the heating power of the inside electric core pole piece of different batteries to make this device can simulate the battery heat dissipation condition of different models, can accomplish the experiment of battery thermal management detection under the condition that need not produce the battery sample. Thereby shortening the detection period and reducing the detection cost.

Drawings

Fig. 1 is an exploded schematic view of a battery thermal load simulator provided in an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of a heating plate according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a battery thermal load simulation apparatus according to an embodiment of the present invention.

Description of reference numerals:

1. a housing; 11. a first housing; 111. a first board insert; 12. a second housing; 121. a second board plug; 2. a heat generating plate; 21. a heat conducting plate; 22. a resistance wire; 3. a heat transfer plate; 4. tightening the assembly; 41. a connecting rod; 42. a fixed block; 5. a first temperature sensor; 6. a second temperature sensor.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and fig. 3 together, a battery thermal load simulation apparatus according to the present invention will now be described. The battery thermal load simulation device comprises a shell 1, a heating plate 2 and a heat transfer plate 3. A cavity is arranged in the shell 1; the heating plate 2 is arranged in the cavity; the heat transfer plates 3 are arranged in the cavity and are sequentially and alternately arranged in the cavity together with the heating plates 2.

Compared with the prior art, the battery thermal load simulation device provided by the embodiment has the advantages that the shell 1 is arranged, the cavity is arranged in the shell 1, the heating plates 2 and the heat transfer plates 3 are arranged in the cavity, the number of the heating plates 2 and the number of the heat transfer plates 3 are multiple, and the multiple heating plates 2 and the heat transfer plates 3 are sequentially and alternately arranged. The heating plate 2 can simulate the heating power of the pole piece of the battery cell to generate heat. The heating power of the heating plate 2 is matched with the heating power of the battery core pole piece in the battery in reference, and is used for simulating the heating power of the pole piece. The thermal conductivity of heat transfer plate 3 refers to the thermal conductivity of electric core diaphragm for the heat conduction state of simulation diaphragm, the shell of battery is referred to the material of casing 1, and battery heat load analogue means in this application can make heating plate 2 generate heat the simulation according to the power of generating heat of the inside electric core pole piece of battery, and dispel the heat through heat transfer plate 3 and casing 1, the heat dissipation condition that can effectual simulation battery. And can adjust the power that generates heat of board 2 that generates heat according to the power that generates heat of the inside electric core pole piece of battery of difference, make the heat that board 2 that generates heat produced in the fixed time be equal to the heat that the electric core pole piece produced in the battery. Therefore, the device can simulate the heat dissipation conditions of batteries of different models, and can complete the experiment of battery heat management detection under the condition of not producing battery samples. Thereby shortening the detection period and reducing the detection cost.

In some embodiments, the housing 1 may be configured as shown in fig. 1 and 3. Referring to fig. 1 and 3 together, the housing 1 includes a first shell 11, a second shell 12 and a tightening assembly 4. A first inserting plate is arranged on the outer side of the first shell 11; the first housing 11 is detachably connected, and a first slot for accommodating a first plug-in board is arranged on the outer side of the second housing 12; the tightening assembly 4 is arranged between the first housing 11 and the second housing 12 for fixedly connecting the first housing 11 with the second housing 12. The first casing 11 and the second casing 12 are arranged at an interval in the thickness direction of the heat generating plate 2 and the heat transfer plate 3. And positioning and guiding between the first and

second housings

11 and 12 are achieved by guiding of the first and

second insertion plates

111 and 121. The first insert plate 111 and the first slot are located on the side wall of the cavity. Through separating into first shell 11 and second shell 12 with casing 1, can adjust the inside board 2 that generates heat of casing 1 and the quantity of heat transfer plate 3 according to the inside electric core pole piece of different batteries and the quantity of electric core diaphragm, all can press from both sides the board 2 that generates heat and heat transfer plate 3 through first shell 11 and second shell 12 and press from both sides tightly inside the die cavity. The battery thermal load simulation device in the application can be suitable for thermal management test experiments of batteries with different specifications and models. The application range of the battery thermal load simulation device is widened.

In some embodiments, the housing 1 may be configured as shown in fig. 1 and 3. Referring to fig. 1 and 3 together, the number of the first insertion plates is multiple, a second insertion groove is formed between two adjacent first insertion plates, and a second insertion plate in sliding fit with the second insertion groove is formed between two adjacent first insertion grooves. The first and second insertion plates are alternately disposed with each other when the first and

second housings

11 and 12 are coupled together. The width of the first plug board is the same as that of the second plug board. And first plugboard and first slot sliding fit, second plugboard and second slot sliding fit can lead first shell 11 and second shell 12's border lateral wall, prevent that first shell 11 and second shell 12 from taking place to warp and influencing the installation effect of heating plate 2 and heat transfer plate 3.

In some embodiments, the tightening assembly 4 may be configured as shown in fig. 1 and 3. Referring to fig. 1 and 3 together, the tightening assembly 4 includes a connecting rod 41 and a fixing block 42. The connecting rod 41 penetrates through the second shell 12, and an external thread is arranged on the connecting rod 41; the fixing block 42 is fixedly installed inside the first housing 11, and is screw-coupled with the connection rod 41. The connecting rod 41 is a screw. The second housing 12 is provided with a through hole for penetrating the connecting rod 41, and the connecting rod 41 is in threaded connection with the fixing block 42 after penetrating through the through hole, so that the heating plate 2 and the heat transfer plate 3 are fixedly clamped. The fixing block 42 is provided with a screw hole which is screwed with the connecting rod 41. The threaded hole penetrates through the fixing block 42, so that the connecting rod 41 can penetrate through the fixing block 42 to clamp the heating plate 2 and the heat transfer plate 3 when the number of the heating plate 2 and the heat transfer plate 3 is small and the length of the connecting rod 41 is long.

Alternatively, in this embodiment, the fixing block 42 and the first housing 11 are integrally formed.

Specifically, in this embodiment, a supporting block corresponding to the fixing block 42 is further disposed on the second housing 12, and a via hole for mounting the connecting rod 41 is located on the supporting block, so that the strength of the mounting position of the connecting rod 41 can be enhanced.

In some embodiments, the housing 1 may be configured as shown in fig. 1. Referring to fig. 1, the number of the fixing blocks 42 is plural, the fixing blocks 42 are enclosed inside the first casing 11, and the heat generating plate 2 and the heat transfer plate 3 are provided with sliding grooves which are in sliding fit with the fixing blocks 42. The fixed blocks 42 are respectively arranged in the middle and the corner of the side wall of the cavity, and sliding grooves corresponding to the sliding blocks are uniformly distributed on the periphery of the heating plate 2 and the heat transfer plate 3, so that the heating plate 2 and the heat transfer plate 3 can be effectively positioned. The heat radiating plate and the heat transfer plate 3 are prevented from rattling inside the casing 1. The stability of fixing the heating plate 2 and the heat transfer plate 3 in the using process is improved. And the heating plate 2 and the heat transfer plate 3 are convenient to position and install, and the operation is convenient and fast.

In some embodiments, the fixing block 42 may be configured as shown in fig. 1. Referring to fig. 1, the fixing block 42 has a square structure in cross section in a direction perpendicular to the axis of the connecting rod 41. The cross sections of the fixing block 42 and the sliding groove are of square structures. The fixing block 42 can be positioned at the installation angle of the heating plate 2 and the heat transfer plate 3 after sliding into the sliding groove, so that the heating plate 2 and the rest sliding grooves on the heat transfer plate 3 can be aligned to align the corresponding fixing block 42. The operation is convenient, and the installation of the heating plate 2 and the heat transfer plate 3 is convenient.

Optionally, in this embodiment, a distance from the end surface of one of the fixing blocks 42 to the bottom of the cavity is greater than distances from the end surfaces of the other fixing blocks 42 to the bottom of the cavity. The heating plate 2 and the heat transfer plate 3 can be positioned by the longer fixing block 42, so that the heating plate 3 and other fixing blocks 42 are aligned conveniently.

In some embodiments, the heating plate 2 and the housing 1 may adopt the structure shown in fig. 1 and 3. Referring to fig. 1 and 3, a first temperature sensor 5 is embedded in the heating plate 2, and a second temperature sensor 6 is mounted on the outer side of the casing 1. First temperature sensor 5 is used for the temperature that generates heat of induction heating plate 2 for whether the temperature that generates heat with the inside electric core pole piece of battery is the same, thereby adjusts the power that generates heat of heating plate 2 and in order to reach the effect that generates heat the same with the inside electric core pole piece of battery. The second temperature sensor 6 is arranged to detect the temperature data of the surface of the shell 1 and upload the data, so that a data basis is provided for the whole test.

In some embodiments, the heating plate 2 and the housing 1 may adopt the structure shown in fig. 1, fig. 2 and fig. 3. Referring to fig. 1, 2 and 3, the number of the first temperature sensors 5 and the second temperature sensors 6 is multiple, and the first temperature sensors and the second temperature sensors are uniformly distributed on the heating plate 2 and the casing 1, respectively. A plurality of second temperature sensors 6 are uniformly distributed on the outer side surface of the shell 1, and a plurality of first temperature sensors 5 are uniformly distributed on the heating plate 2. Can monitor each position of heating plate 2 and the whole casing 1, improve the accuracy of monitoring data.

In some embodiments, the heating plate 2 may have a structure as shown in fig. 2. Referring to fig. 2, the heating plate 2 includes a heat-conducting plate 21 and a resistance wire 22. The resistance wire 22 is embedded inside the heat conducting plate 21 and is uniformly distributed inside the heat conducting plate 21. The resistance wire 22 is arranged in the heat conducting plate 21 in a reciprocating bending mode, and the heating state of the cell pole piece is simulated through the arrangement density and the position of the resistance wire 22. The heat conductivity coefficient of the heat conducting plate 21 is equal to that of the cell pole piece. The heat generated by the heating plate 2 is matched to be the same as the battery pole piece by adjusting the current load of the resistance wire 22, so that the heating effect of the heating plate 2 is realized.

In some embodiments, the housing 1 may be configured as shown in fig. 1 and 2. Referring to fig. 1 and 2 together, a thin film having the same thermal conductivity as that of the blue film outside the battery is applied to the outside of the case 1. The film made of PE is pasted on the outer side of the shell 1, and the heat conduction system of the film is equal to the heat conduction coefficient of the blue film of the battery shell. A second temperature sensor 6 is located on the membrane for detecting the temperature outside the membrane. The battery thermal load simulation device in the application can be used for more accurately matching the heating and heat transfer states of the battery.

Specifically, according to the working principle of the application, the current load is added into the resistance wire 22 inside the heating plate 2 according to the heating state and parameters of the battery inner battery cell pole piece provided by the battery manufacturer, and the temperature change condition of the heating plate 2 is observed through the first temperature sensor, so that the heating effect of the battery inner battery cell pole piece is achieved by adjusting the current load in time. Then the heat is transmitted to the heat transfer plate 3 through the heating plate 2, and finally is led out to the shell 1 through the transmission of the plurality of heating plates 2 and the heat transfer plate 3. The heat conduction in all directions is realized, so that the heating and heat transfer states of the battery are simulated. The test is carried out by replacing a battery sample, so that the period is shortened, and the cost is saved.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A battery thermal load simulation apparatus, comprising:

the heating plate is arranged in the cavity;

2. The battery thermal load simulation device of claim 1, wherein the housing comprises:

the outer side of the first shell is provided with a first inserting plate;

a tightening assembly disposed between the first housing and the second housing for fixedly connecting the first housing and the second housing.

3. The battery thermal load simulator of claim 2, wherein the number of the first insertion plates is plural, and a second insertion slot is formed between two adjacent first insertion plates, and a second insertion plate slidably fitted into the second insertion slot is formed between two adjacent first insertion slots.

4. The battery thermal load simulation apparatus of claim 2, wherein the tightening assembly comprises:

5. The battery thermal load simulator according to claim 4, wherein the number of the fixing blocks is plural, the plural fixing blocks are enclosed inside the first housing, and the heat generating plate and the heat transfer plate are each provided with a sliding groove which is slidably fitted to the fixing block.

6. The battery thermal load simulator of claim 5, wherein the fixing block has a square structure in cross section in a direction perpendicular to the axis of the connecting rod.

7. The battery thermal load simulator according to claim 1, wherein a first temperature sensor is embedded in the heat generating plate, and a second temperature sensor is mounted on an outer side of the case.

8. The battery thermal load simulator of claim 7, wherein the first temperature sensor and the second temperature sensor are provided in plural numbers and are uniformly distributed on the heat generating plate and the housing, respectively.

9. The battery thermal load simulation device of claim 1, wherein the heat generating plate comprises:

a heat conducting plate;

and the resistance wires are embedded in the heat-conducting plate and are uniformly distributed in the heat-conducting plate.

10. The battery thermal load simulator of claim 1, wherein a thin film having the same thermal conductivity as a blue film on the outside of the battery is applied to the outside of the housing.