Lithium ion battery temperature control tool

Abstract

The utility model discloses a lithium ion battery temperature control tool which comprises a temperature control part, the temperature control part is of a box body structure, first heat conduction gel and second heat conduction gel are arranged in the temperature control part, and a space used for containing a battery is arranged between the first heat conduction gel and the second heat conduction gel. By arranging the plastic crystal material, the heat-conducting gel and the heat storage layer, through solid-phase refrigeration and material heat storage, the stability of the battery can be effectively controlled, and by matching with a charging and discharging detection cabinet, the stability of the battery can be effectively controlled, so that the battery can be conveniently charged and discharged, and the service life of the battery can be prolonged. And moreover, the liquid leakage risk is avoided, the refrigeration efficiency is high, energy is saved, and low-carbon and environment-friendly effects are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-ion batteries, and specifically relates to a temperature control tooling for lithium-ion batteries. Background Art

[0002] In the field of lithium-ion batteries, the temperature of a single cell increases during charge and discharge, and the cell temperature affects the electrochemical reactions at the electrodes, electrolyte, and solid-liquid / solid-solid interfaces, thereby affecting the electrical performance of the battery. On the one hand, during the high-temperature cycling of a single cell, if high-rate discharging is adopted, the discharging temperature is relatively high. As the number of cycles increases, the discharging temperature approaches the temperature protection upper limit of 60 °C, and there is a risk of increasing discharging temperature, which affects the cycling performance and use safety of the cell. On the other hand, regarding fast charge cycling tests, it has been reported in the literature that the fast charging process needs to be carried out within a suitable temperature range, and in actual PACKs, thermal management is adopted to release the best performance of the battery. However, currently, the charge and discharge detection equipment only supports maintaining a conventional constant temperature environment (test temperature) and cannot support staged temperature changes; in addition, the PACK uses liquid cooling for cooling, without considering the suitable time to enable liquid cooling and the safety of the liquid cooling method. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a temperature control tooling for lithium-ion batteries to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A temperature control tooling for lithium-ion batteries includes a temperature control part. The temperature control part is of a box structure. Inside the temperature control part, there are a first thermal conductive gel and a second thermal conductive gel. A space for accommodating the battery is provided between the first thermal conductive gel and the second thermal conductive gel. Plastic crystal material parts are provided at the ends of the first thermal conductive gel and the second thermal conductive gel away from the battery. A pressure mechanism for detecting the pressure of the plastic crystal material part is provided inside the temperature control part.

[0006] As a further scheme of the utility model: An charge and discharge detection cabinet for detecting the battery is provided outside the temperature control part.

[0007] As a further scheme of the utility model: A pressure sensor is provided inside the box of the temperature control part. The pressure sensor is in signal communication with the pressure mechanism. A pressure display in signal communication with the pressure sensor is provided outside the temperature control part.

[0008] As a further scheme of the utility model: The first thermal conductive gel and the second thermal conductive gel are respectively arranged in contact with the positive and negative electrodes of the battery.

[0009] As a further solution of the present utility model: The plastic crystal material part includes a first plastic crystal material and a second plastic crystal material. The first plastic crystal material is located on the side of the first thermal conductive gel away from the battery, and the second plastic crystal material is located on the side of the second thermal conductive gel away from the battery.

[0010] As a further solution of the present utility model: The inner wall of the box body of the temperature control part is provided with a heat storage layer. A first heat channel and a second heat channel are respectively provided at positions of the heat storage layer close to the first plastic crystal material and the second plastic crystal material.

[0011] As a further solution of the present utility model: The first plastic crystal material and the second plastic crystal material adopt a mixture of neopentyl glycol, pentaerythritol and polyol.

[0012] As a further solution of the present utility model: Pressure mechanisms are provided on both sides of the first plastic crystal material and the second plastic crystal material.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: By setting the plastic crystal material, the thermal conductive gel and the heat storage layer, the present utility model can effectively control the stability of the battery through solid-phase refrigeration and material heat storage. Cooperating with the charge and discharge detection cabinet, it realizes precise stage temperature control, improves the cycle life of the battery, and has no risk of liquid leakage, high refrigeration efficiency, energy saving, low carbon and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of this embodiment.

[0015] In the figure: 1 - First heat channel, 2 - First plastic crystal material, 3 - Pressure mechanism, 4 - First thermal conductive gel, 5 - Battery, 6 - Second thermal conductive gel, 7 - Second plastic crystal material, 8 - Heat storage layer, 9 - Second heat channel, 10 - Temperature control part, 11 - Pressure display, 12 - Pressure sensor, 13 - Charge and discharge detection cabinet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0017] Please refer to Figure 1 , in the embodiment of the present utility model, a temperature control tool for a lithium-ion battery includes a temperature control part 10. An external charge and discharge detection cabinet 13 for detecting the battery 5 is provided outside the temperature control part 10. The charge and discharge detection cabinet 13 is connected to the positive and negative electrodes of the battery 5 to monitor the voltage, current and temperature data of the battery 5.

[0018] The temperature control part 10 is of a box structure. Inside the temperature control part 10, there are a first thermal conductive gel 4 and a second thermal conductive gel 6. There is a space for accommodating the battery 5 between the first thermal conductive gel 4 and the second thermal conductive gel 6. That is, the first thermal conductive gel 4 and the second thermal conductive gel 6 are respectively arranged in contact with the positive and negative electrodes of the battery 5. At the ends of the first thermal conductive gel 4 and the second thermal conductive gel 6 far from the battery 5, there are plastic crystal material parts. Outside the plastic crystal material parts, there is a pressure mechanism 3. Inside the box of the temperature control part 10, there is a pressure sensor 12. Outside the temperature control part 10, there is a pressure display 11 that is in signal communication with the pressure sensor 12. The pressure sensor 12 is in signal communication with the pressure mechanism 3. The pressure mechanism 3 connects the pressure display 11 and the pressure sensor 12 to realize the synchronous display of voltage, temperature, and pressure.

[0019] In this embodiment, the plastic crystal material parts include a first plastic crystal material 2 located at the upper end of the first thermal conductive gel 4 and a second plastic crystal material 7 located outside the second thermal conductive gel 6. On the inner wall of the box of the temperature control part 10, there is a heat storage layer 8. At positions close to the first plastic crystal material 2 and the second plastic crystal material 7 respectively, there are a first heat channel 1 and a second heat channel 9. The first plastic crystal material 2 and the second plastic crystal material 7 are made of a mixture of neopentyl glycol, pentaerythritol, and polyol. On both sides of the first plastic crystal material 2 and the second plastic crystal material 7, there is a pressure mechanism 3.

[0020] When the present utility model is in use, the battery 5 to be detected is placed into the temperature control part 10, and then the box door is closed. Before the battery 5 discharges, the pressure mechanism 3 is started, and pressure is applied to the first plastic crystal material 2 and the second plastic crystal material 7 through the pressure mechanism 3. At this time, the first plastic crystal material 2 and the second plastic crystal material 7 are in a compressed state and release heat. The released heat can be released through the first heat channel 1 and the second heat channel 9. Subsequently, during the discharge process of the battery core, the pressure is released, and the plastic crystal material is used to absorb heat during pressure release (the piezocaloric effect) to achieve the purpose of heat dissipation at the top and bottom of the battery core, increase the heat dissipation during the discharge process of the battery core, reduce the influence of internal resistance heat during the discharge process, and improve the performance of the battery.

[0021] The plastic crystal materials 2 and 7 have heat storage characteristics. During the pressure release process of the pressure mechanism 3, the pressure remains unchanged, and the heat is stored inside the first plastic crystal material 2 and the second plastic crystal material 7. The battery 5 releases heat before the fast charge cycle test charging, which is beneficial to the electrochemical reaction during the fast charge process of the battery, enables the battery to operate stably at a certain temperature, and the fast charge performance of the battery is stably released.

[0022] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0023] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A temperature control tooling for a lithium-ion battery, characterized in that It includes a temperature control part (10), the temperature control part (10) is of a box structure, a first thermal conductive gel (4) and a second thermal conductive gel (6) are arranged inside the temperature control part (10), a space for accommodating a battery (5) is arranged between the first thermal conductive gel (4) and the second thermal conductive gel (6), plastic crystal material parts are arranged at one ends of the first thermal conductive gel (4) and the second thermal conductive gel (6) far away from the battery (5), and a pressure mechanism (3) for detecting the pressure of the plastic crystal material parts is arranged inside the temperature control part (10).

2. The temperature control tooling for a lithium-ion battery according to claim 1, characterized in that An charge and discharge detection cabinet (13) for detecting the battery (5) is arranged outside the temperature control part (10).

3. The temperature control tooling for a lithium-ion battery according to claim 1, characterized in that A pressure sensor (12) is arranged inside the box body of the temperature control part (10), the pressure sensor (12) is in signal communication with the pressure mechanism (3), and a pressure display (11) in signal communication with the pressure sensor (12) is arranged outside the temperature control part (10).

4. The temperature control tooling for a lithium-ion battery according to claim 1, characterized in that The first thermal conductive gel (4) and the second thermal conductive gel (6) are respectively arranged in contact with the positive and negative electrodes of the battery (5).

5. The temperature control tooling for a lithium-ion battery according to claim 1, characterized in that, The plastic crystal material part includes a first plastic crystal material (2) and a second plastic crystal material (7), the first plastic crystal material (2) is located on the side of the first thermal conductive gel (4) far away from the battery (5), and the second plastic crystal material (7) is located on the side of the second thermal conductive gel (6) far away from the battery (5).

6. The temperature control tooling for a lithium-ion battery according to claim 5, characterized in that A heat storage layer (8) is arranged on the inner wall of the box body of the temperature control part (10), and a first heat channel (1) and a second heat channel (9) are respectively arranged at positions of the heat storage layer (8) close to the first plastic crystal material (2) and the second plastic crystal material (7).

7. A temperature control tooling for a lithium-ion battery according to claim 5, characterized in that, Pressure mechanisms (3) are arranged on both sides of the first plastic crystal material (2) and the second plastic crystal material (7).

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