Thermal management battery pack

Abstract

The utility model relates to a thermal management battery pack in the technical field of batteries, which comprises a shell, a battery cell, a Peltier element and a heat conduction component, the battery cell is arranged in the shell, the Peltier element is arranged on the battery cell, the Peltier element exchanges heat with the battery cell, the heat conduction component comprises a heat conduction insulating sheet, and the heat conduction insulating sheet is arranged in the shell. The first surface and the second surface of the Peltier element are both provided with heat-conducting insulating sheets, and the Peltier element conducts heat to the battery cell through the heat-conducting insulating sheets. Compared with the prior art, the current direction is adjusted through the Peltier element, refrigeration and heating of the battery cell are achieved, low heat loss and efficient temperature control performance are achieved, the service life of the battery cell is prolonged, and the service life of the battery cell is prolonged. And the battery is ensured to operate in the optimal temperature range.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a thermal management battery pack. Background Technology

[0002] With the rapid development of the electric vehicle and energy storage system industries, power batteries or energy storage batteries have become one of the core technologies of the entire system. Batteries generate a large amount of heat during operation. Improper thermal management can lead to excessively high or low temperatures, affecting battery performance, cycle efficiency, and lifespan, and even causing serious safety problems such as thermal runaway.

[0003] Traditional air cooling and liquid cooling technologies are widely used in battery thermal management, but they have many drawbacks and cannot meet the current demand for precise temperature control of high-energy-density batteries. Specifically, air cooling technology has low cooling efficiency, cannot cool the entire battery pack uniformly, and is prone to localized overheating. Liquid cooling technology has better cooling effect, but its control system is complex, the equipment is large, the installation and maintenance costs are high, and the energy consumption is high.

[0004] Therefore, there is an urgent need for a thermal management battery pack that can solve the above problems. Utility Model Content

[0005] In view of this, the present invention proposes a thermal management battery pack that can precisely control the temperature of the battery and avoid localized overheating or overcooling. The technical solution of the present invention is as follows:

[0006] This utility model proposes a thermal management battery pack, including: a housing, a battery cell, a Peltier element, and a thermally conductive assembly. The battery cell is disposed inside the housing, and the Peltier element is disposed on the battery cell. The Peltier element exchanges heat with the battery cell. The thermally conductive assembly includes a thermally conductive insulating sheet. The thermally conductive insulating sheet is disposed on both the first and second sides of the Peltier element. The Peltier element conducts heat to the battery cell through the thermally conductive insulating sheet.

[0007] Specifically, the thermally conductive insulating sheet is provided with a receiving groove, and the Peltier element is partially embedded in the receiving groove and fits against the inner wall of the receiving groove.

[0008] Specifically, the thermal management battery pack further includes a heat dissipation component, which is disposed inside the housing and is in contact with the thermal conductive component.

[0009] Furthermore, the first side of the Peltier element faces the bottom of the battery cell, and the second side faces the bottom surface inside the housing. The Peltier element is configured such that when the first side heats up, the second side cools down, or when the first side cools down, the second side heats up.

[0010] Specifically, there is at least one Peltier element and at least one battery cell. The size of the Peltier element is the same as the size of the bottom of the battery cell, and the Peltier element corresponds one-to-one with the battery cell.

[0011] Specifically, the Peltier element and the thermally conductive insulating sheet are disposed between adjacent battery cells.

[0012] Furthermore, two Peltier elements are provided between adjacent cells, with the first faces of the two Peltier elements facing away from each other and the second faces facing each other. A thermally conductive insulating sheet is provided between the Peltier element and the corresponding cell, and a thermally conductive insulating sheet is provided between the two Peltier elements.

[0013] Optionally, the multiple Peltier elements can be connected in series or in parallel.

[0014] Furthermore, the bottom of the thermally conductive insulating sheet is used for heat conduction with the heat dissipation assembly.

[0015] Optionally, the thermal management battery pack further includes a controller and a temperature sensor. The temperature sensor is communicatively connected to the controller and configured to acquire the temperature of the battery cell and generate a temperature signal to send to the controller. The Peltier element is communicatively connected to the controller, and the controller is configured to adjust the start and stop of the Peltier element according to the temperature signal.

[0016] The advantages of this utility model are as follows:

[0017] 1. The Peltier element used in this utility model has a simple structure and occupies little space. It can cool and heat the battery cell by adjusting the direction of the current. It has low heat loss and high temperature control performance, ensuring that the battery operates within the optimal temperature range.

[0018] 2. In this utility model, the Peltier element is set at the bottom of the battery cell and heat conduction is achieved through a thermally conductive insulating sheet, which enhances the heat conduction efficiency and realizes thermoelectric separation and electrical isolation, thereby improving the safety of the system.

[0019] 3. The thermally conductive insulating sheet of this utility model is provided with a receiving groove to ensure that the Peltier element is accurately positioned and closely fits the thermally conductive component, reducing energy loss. Moreover, the Peltier element corresponds one-to-one with the battery cell, ensuring uniform heat exchange for each battery cell and simplifying installation and maintenance.

[0020] 4. The heat dissipation component of this utility model is set on the second side of the Peltier element. When the cell is cooled, it can quickly conduct heat to the outside to avoid the battery overheating. The design of the Peltier and heat conduction component between adjacent cells further improves the overall heat dissipation effect.

[0021] 5. The Peltier elements of this utility model are connected in series or parallel and equipped with independent control circuits. The controller and temperature sensor collect the cell temperature information in real time and adjust the current direction to achieve precise temperature control of individual cells, thereby improving overall performance and service life. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0024] Figure 1 This is an overall structural diagram of an embodiment of the present utility model;

[0025] Figure 2 for Figure 1 The front view of this embodiment;

[0026] Figure 3 for Figure 1 Left view of this embodiment.

[0027] The meanings of the reference numerals in the above figures are as follows:

[0028] 1. Shell;

[0029] 2. Battery cells;

[0030] 3. Peltier element;

[0031] 4. Thermally conductive insulating sheet;

[0032] 41. First conductor insulating sheet;

[0033] 42. Second conductor insulating sheet;

[0034] 5. Heat dissipation components;

[0035] 6. Temperature sensor;

[0036] 7. Controller. Detailed Implementation

[0037] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the detailed description is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having” and any variations thereof in the specification, claims and foregoing description of the invention are intended to cover non-exclusive inclusion.

[0039] In the description of the specific embodiments of this utility model, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly defined.

[0040] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0041] In the description of this utility model embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this utility model, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0042] Throughout this invention, numerical values ​​represent approximate measurements or limits of a range to cover minute deviations from a given value, as well as embodiments having approximately the mentioned value and embodiments having the exact mentioned value. Except for the working examples provided at the end of the detailed description, all numerical values ​​of parameters, quantities, or conditions in the appended claims should be understood to be modified in all cases by the term “about,” regardless of whether “about” actually appears before the numerical value. “About” indicates that the stated numerical value allows for some minute inaccuracy that is somewhat close to the exact value of the value; approximately or reasonably close to the value; almost. If the inaccuracy provided by “about” is not otherwise understood in this common sense in the art, then “about” as used in this invention at least indicates a variation that can be produced by common methods of measuring and using such parameters. For example, “about” may include a variation of less than or equal to 5%, optionally less than or equal to 4%, optionally less than or equal to 3%, optionally less than or equal to 2%, optionally less than or equal to 1%, optionally less than or equal to 0.5%, and in some respects, optionally less than or equal to 0.1%.

[0043] Additionally, the disclosure of the range includes the disclosure of all values ​​across the entire range and the disclosure of further subdivided ranges, including the endpoints and subranges given for these ranges.

[0044] The embodiments of the present invention will be described in more detail below through examples. It should be noted that the embodiments of the present invention are not limited to these examples.

[0045] like Figure 1 As shown, this application discloses a thermal management battery pack, including: a housing 1, a battery cell 2, a Peltier element 3, and a thermal conductive assembly. The battery cell 2 is disposed inside the housing 1, and the Peltier element 3 is disposed on the battery cell 2. The Peltier element 3 exchanges heat with the battery cell 2. The thermal conductive assembly includes a thermally conductive insulating sheet 4. The first and second sides of the Peltier element 3 are provided with the thermally conductive insulating sheet 4. The Peltier element 3 conducts heat to the battery cell 2 through the thermally conductive insulating sheet 4.

[0046] Through the above configuration, the Peltier element 3 exchanges heat with the battery cell 2 via the heat-conducting component, thereby enabling cooling and heating of the battery cell 2. The heat-conducting component is configured to conduct heat during heat exchange between the Peltier element 3 and the battery cell 2. Compared to existing technologies, the Peltier element 3 used in this application has a simple structure and occupies little space. Utilizing its own properties, it can adjust the current direction and perform cooling or heating on its own. Compared to air cooling and liquid cooling in existing technologies, it has low heat loss and can achieve precise temperature control of the battery.

[0047] In some embodiments, a receiving groove is formed on the thermally conductive insulating sheet 4, and the Peltier element 3 is disposed in the receiving groove, which enables the positioning of the Peltier element 3. Furthermore, the portion of the Peltier element 3 that extends into the receiving groove can fit against the inner wall of the receiving groove, increasing the contact area between the thermally conductive insulating sheet 4 and the Peltier element 3, thereby achieving a better heat conduction effect from the thermally conductive insulating sheet 4 to the Peltier element 3.

[0048] In some embodiments, the thermal management battery pack further includes a heat dissipation component 5, which is disposed within the housing 1 and is used to contact the thermally conductive component. The heat dissipation component 5 facilitates heat dissipation from the battery cell 2 by contacting the thermally conductive component.

[0049] In some specific embodiments, the heat dissipation assembly 5 includes a heat sink and several heat dissipation grilles. One side of the heat sink faces the battery cell 2, and the several heat dissipation grilles are arranged at intervals on the side of the heat sink facing away from the battery cell 2. The heat on the battery cell 2 can be dissipated through the heat dissipation grilles. Specifically, the heat dissipation grilles and the heat sink can be integrally formed or detachably connected; no further restrictions are imposed here.

[0050] In some embodiments, the Peltier element 3 is disposed at the bottom of the battery cell 2, with its first side facing the bottom of the battery cell 2 and its second side facing the inner bottom surface of the housing 1. The Peltier element 3 is configured such that when the first side heats up, the second side cools down, and when the first side cools down, the second side heats up. The thermally conductive assembly includes a thermally conductive insulating sheet 4. Both the first and second sides of the Peltier element 3 are provided with the thermally conductive insulating sheet 4. The thermally conductive insulating sheet 4 and the Peltier element 3 form an integral unit and are disposed together at the bottom of the battery cell 2. The Peltier element 3 heats or cools the battery cell 2 through the thermally conductive insulating sheet 4.

[0051] Through the above settings, the thermally conductive insulating sheet 4 can enhance heat conduction efficiency, ensuring that the heat generated by the battery can be quickly absorbed, maximizing heat exchange efficiency. Furthermore, the thermally conductive insulating sheet 4 can also achieve thermoelectric separation of the battery pack, realizing electrical isolation.

[0052] The heat dissipation assembly 5 is located at the bottom of the battery cell 2, between the conductive insulating sheet 4 and the bottom surface of the housing 1. Specifically, the heat sink faces the second side of the Peltier element 3 and is in contact with the conductive insulating sheet 4, while the heat dissipation grid is located on the bottom surface of the housing 1. When heat dissipation is required for the battery cell 2, the first side (facing the battery cell) of the Peltier element 3 cools the battery cell 2, while the second side (facing the heat sink) heats it. The heat from the second side is conducted to the heat sink through the thermally conductive insulating sheet 4 near the second side, and then dissipated by the heat dissipation grid on the heat sink. The multiple heat dissipation grids increase the contact area with the air, achieving a better heat dissipation effect. When heat dissipation is required for the battery cell 2, the first side of the Peltier element 3 heats the battery cell 2, while the second side cools it. The second side can absorb heat from the air or other contact parts through the heat dissipation grid and heat sink.

[0053] In some specific implementations, the Peltier element 3 corresponds one-to-one with the battery cell 2. The shape and size of the Peltier element 3 are the same as the shape and size of the bottom of the battery cell 2, so that the Peltier element 3 can completely cover the bottom of the corresponding battery cell 2, so as to ensure that each battery cell 2 is heated evenly during heat exchange.

[0054] In some embodiments, a Peltier element 3 and a heat-conducting component are also provided between two adjacent battery cells 2 to increase the heat exchange area with the battery cells 2, thereby enabling better thermal management of the battery cells 2.

[0055] In some specific implementation methods, such as Figure 2 and Figure 3 Two Peltier elements 3 are arranged between two adjacent battery cells 2. The first faces of the two Peltier elements 3 are facing away from each other, and the second faces are facing each other. A first thermally conductive insulating sheet 41 is arranged between the Peltier element 3 and the corresponding battery cell 2, and a second thermally conductive insulating sheet 42 is arranged between two adjacent Peltier elements 3. A heat dissipation assembly 5 is connected to the bottom and top ends of the second thermally conductive insulating sheet 42 and is located outside the stacked battery cells 2. When the first face of the Peltier element 3 cools the battery cell 2, the Peltier element 3 transfers the heat absorbed from the battery cell 2 to the heat dissipation assembly 5 through the second insulating sheet to achieve heat dissipation.

[0056] In some other embodiments, a Peltier element 3 is disposed between two adjacent battery cells 2, and the arrangement of the Peltier element 3 is the same as in the embodiment described above where the Peltier element is disposed at the bottom of the battery cell. A Peltier element 3 is also disposed at the bottom of all battery cells 2, and the arrangement of the Peltier element 3 is the same as in the embodiment described above where the Peltier element 3 is disposed at the bottom of the battery cell 2. By disposing of Peltier elements 2 between two battery cells 2 and at the bottom of the battery cells 2, the contact area between the Peltier element 3 and the battery cells 2 is increased, thereby improving the heating or cooling effect on the battery cells 2.

[0057] Specifically, the bottom end of the second thermally conductive insulating sheet 42 between the two battery cells 2 contacts the first conductive insulating sheet 41 disposed at the bottom of the battery. The second insulating sheet 42 between the two battery cells 2 contacts the heat dissipation assembly 5 disposed at the top of the battery cell 2, and the heat dissipation assembly 5 disposed at the top of the battery cell can achieve heat dissipation of the battery cell.

[0058] In some specific embodiments, the Peltier elements 3 are connected in series or in parallel. Preferably, the Peltier elements 3 are connected in parallel, and each Peltier element 3 has an independent control circuit.

[0059] In this embodiment, the battery pack also includes a controller 7 and a temperature sensor 6. Each cell 2 is equipped with an independent temperature sensor 6, and each temperature sensor 6 and each control circuit are communicatively connected to the controller 7.

[0060] In the above setup, temperature sensor 6 is configured to collect the temperature of the corresponding battery cell 2 and generate a temperature signal to send to controller 7. Controller 7 is configured to receive the temperature signals from each temperature sensor 6 and generate a control signal based on the temperature signal, which is then sent to the corresponding control circuit. The control circuit is configured to receive the control signal and adjust the current direction of the corresponding Peltier element 3 according to the control signal. This enables the regulation of the start and stop of the Peltier element 3.

[0061] It should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A thermal management battery pack, characterized in that, include: case; A battery cell, wherein the battery cell is disposed inside the housing; A Peltier element is disposed on the battery cell, and the Peltier element exchanges heat with the battery cell; A thermally conductive assembly includes a thermally conductive insulating sheet, wherein the thermally conductive insulating sheet is disposed on both the first and second sides of the Peltier element, and the Peltier element conducts heat to the battery cell through the thermally conductive insulating sheet.

2. The thermal management battery pack according to claim 1, characterized in that, The thermally conductive insulating sheet is provided with a receiving groove, and the Peltier element is partially embedded in the receiving groove and fits against the inner wall of the receiving groove.

3. A thermal management battery pack according to claim 2, characterized in that, It also includes a heat dissipation component, which is disposed inside the housing and is in contact with the heat conduction component.

4. A thermal management battery pack according to claim 3, characterized in that, The first side of the Peltier element faces the bottom of the battery cell, and the second side faces the bottom surface inside the housing; The Peltier element is configured such that when the first side is heating, the second side is cooling; Alternatively, the second side can be heated while the first side is cooling.

5. A thermal management battery pack according to claim 4, characterized in that, The Peltier element is at least one, and the battery cell is at least one; The Peltier element has the same dimensions as the bottom of the battery cell, and the Peltier element corresponds one-to-one with the battery cell.

6. A thermal management battery pack according to claim 3, characterized in that, The Peltier element and the thermally conductive insulating sheet are disposed between adjacent battery cells.

7. A thermal management battery pack according to claim 6, characterized in that, Two Peltier elements are provided between adjacent cells, with the first faces of the two Peltier elements facing each other and the second faces facing each other; The thermally conductive insulating sheet is disposed between the Peltier element and the corresponding battery cell, and the thermally conductive insulating sheet is disposed between two Peltier elements.

8. A thermal management battery pack according to claim 7, characterized in that, The multiple Peltier elements are connected in series or in parallel.

9. A thermal management battery pack according to claim 7, characterized in that, The bottom of the thermally conductive insulating sheet is used for heat conduction with the heat dissipation assembly.

10. A thermal management battery pack according to any one of claims 1 to 9, characterized in that, It also includes a controller and a temperature sensor, the temperature sensor being communicatively connected to the controller and configured to acquire the temperature of the battery cell and generate a temperature signal to send to the controller; the Peltier element being communicatively connected to the controller, the controller being configured to adjust the start and stop of the Peltier element according to the temperature signal.

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