A heat dissipation battery pack

Abstract

This utility model provides a heat-dissipating battery pack, belonging to the field of new energy battery technology. A heat-dissipating battery pack includes a cell module, two end plates, two heat-conducting components, and a steel strip. The two heat-conducting components are respectively disposed on two sides of the cell module. Because the heat-conducting components are disposed on both sides of the cell module and in contact with the two side walls of the cell module, the heat generated by the cell module is conducted from the cell module to the outside through the heat-conducting components, and then cooled by the heat dissipation mechanism provided on the battery pack shell. This solves the technical problem in the prior art where heat cannot be dissipated from the cell module in a timely manner, causing damage to the cell. The heat-conducting components provided by this utility model include a heat sink and heat dissipation pads. The heat dissipation pads, made of phase change material, can not only dissipate the heat generated by the cell module but also insulate the cell module. When the temperature is too low, the heat dissipation pads release heat to maintain the normal operating temperature of the cell module.

Description

Technical Field

[0001] This utility model belongs to the field of new energy battery technology, and specifically relates to a heat dissipation battery pack. Background Technology

[0002] A battery pack consists of multiple cell assemblies (cell modules) and end plates, which are usually housed inside the battery pack casing.

[0003] In existing technology, the cell module and end plates are connected by steel strips. Two end plates are respectively located at both ends of the cell module; specifically, at least two steel strips are clamped onto the assembly of the cell module and the two end plates. A heat dissipation mechanism is typically installed on the exterior of the assembly of the cell module, the two end plates, and the steel strips. A gap often exists between the cell module and the heat dissipation mechanism, allowing heat to conduct through this gap. However, the heat generated inside the cell module cannot be transferred to its surface in a timely manner, resulting in low heat dissipation efficiency. The inability to dissipate heat promptly can easily lead to severe heat buildup within the cell, causing damage. Utility Model Content

[0004] This utility model provides a heat dissipation battery pack, which aims to solve the technical problem in the prior art where heat cannot be dissipated in time from the battery cell module, causing damage to the battery cell.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A heat-dissipating battery pack is provided, comprising a cell module, end plates, heat-conducting components, and a steel strip. Two end plates are provided, each located at one end of the cell module; two heat-conducting components are provided, each disposed along the width direction of the cell module on both sides of the cell module and in contact with the two side walls of the cell module; both heat-conducting components are located between the two end plates and correspond to a heat dissipation mechanism; the heat-conducting components are used to absorb heat from inside the cell module in a timely manner and dissipate heat to the external heat dissipation mechanism; the steel strip is used to bind the assembly formed by the cell module, the two end plates, and the two heat-conducting components.

[0006] In one possible implementation, the heat-conducting component includes a heat sink and heat dissipation patches. The outer surface of the heat sink has an elongated groove along the length of the battery module, the elongated groove being integrally connected to the heat sink. Extensions are provided at both ends of the elongated groove, extending out of the heat sink, and each extension extends into a positioning groove provided on one of the two end plates. Two heat dissipation patches are provided, both disposed on the inner surface of the heat sink and located on opposite sides of the elongated groove along the height of the battery module. Each heat dissipation patch is in contact with the battery module.

[0007] In one possible implementation, the positioning groove is located at the middle of the end plate along the height direction of the end plate.

[0008] In one possible implementation, the elongated groove is located at the middle of the heat sink along the height direction of the battery module.

[0009] In one possible implementation, the inner surface of the heat sink is provided with an mounting groove for mounting the heat sink patch.

[0010] In one possible implementation, the heat sink is made of sheet metal of aluminum alloy.

[0011] In one possible implementation, the heat dissipation patch is a rectangular sheet made of a phase change material.

[0012] In one possible implementation, the end plate has a hollow structure inside.

[0013] In one possible implementation, the heat dissipation patch is a phase change material.

[0014] This embodiment provides a heat-dissipating battery pack, which, compared with the prior art, includes a cell module, two end plates, two heat-conducting components, and a steel strip. The two heat-conducting components are respectively disposed on two sides of the cell module. Since the heat-conducting components are located on both sides of the cell module and in contact with the two side walls of the cell module, the heat generated by the cell module is conducted from the cell module to the outside through the heat-conducting components, and then cooled by the heat dissipation mechanism provided on the battery pack casing. This solves the technical problem in the prior art where heat cannot be dissipated from the cell module in a timely manner, causing damage to the cell. Attached Figure Description

[0015] Figure 1 A front view of a heat-dissipating battery pack (excluding the battery pack casing and heat dissipation structure) provided in an embodiment of this utility model;

[0016] Figure 2 A three-dimensional structural diagram of the end plate provided in an embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram illustrating the installation of the heat sink and heat dissipation pads provided in an embodiment of the present utility model.

[0018] Figure 4 This is a front view of the heat sink in an embodiment of the present invention;

[0019] Figure 5 This is a three-dimensional structural diagram of the heat sink in an embodiment of the present utility model;

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. End plate; 2. Heat-conducting component; 10. Steel strip; 11. Positioning groove; 21. Heat sink plate; 211. Extension; 213. Long groove; 22. Heat sink patch; 212. Folded edge; 3. Top cover plate. Detailed Implementation

[0022] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0023] It should be further explained that the accompanying drawings and embodiments of this utility model mainly describe the concept of this utility model. Based on this concept, some specific forms and settings of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this utility model, they can implement the above-mentioned specific forms and settings in a well-known manner.

[0024] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0025] The terms “length,” “width,” “up,” “down,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0027] Please refer to the following: Figure 1 and Figure 2 The present invention will now describe a heat dissipation battery pack.

[0028] A heat-dissipating battery pack includes a cell module, end plates 1, heat-conducting components 2, and a steel strip 10. Two end plates 1 are provided, located at opposite ends of the cell module. Two heat-conducting components 2 are provided, positioned along the width of the cell module on both sides and in contact with the two side walls of the cell module. Both heat-conducting components 2 are located between the two end plates 1 and correspond to a heat dissipation mechanism. The heat-conducting components 2 are used to absorb heat from inside the cell module and dissipate it to the external heat dissipation mechanism. The steel strip 10 is used to bind the assembly formed by the cell module, the two end plates 1, and the two heat-conducting components 2.

[0029] The battery cell module has a rectangular parallelepiped shape and has length, width and height directions.

[0030] First, the heat-conducting component 2 is placed on the side of the cell module. Since there are two heat-conducting components 2, they are placed on the two sides of the cell module respectively. After the end plate 1, the heat-conducting component 2 and the cell module are placed, the steel strip 10 is used to clamp the cell module, the two end plates 1 and the two heat-conducting components 2 into a whole, and finally put it into the battery pack casing.

[0031] This embodiment provides a heat-dissipating battery pack, which, compared with the prior art, includes a cell module, two end plates 1, two heat-conducting components 2, and a steel strip 10. The two heat-conducting components 2 are respectively disposed on two sides of the cell module. Since the heat-conducting components 2 are disposed on both sides of the cell module and in contact with the two side walls of the cell module, the heat generated by the cell module is conducted from the cell module to the outside through the heat-conducting components 2, and then cooled by the heat dissipation mechanism provided on the battery pack casing. This solves the technical problem in the prior art where heat cannot be dissipated from the cell module in a timely manner, causing damage to the cell.

[0032] Please see Figures 3 to 5 In some embodiments, the heat-conducting component 2 includes a heat sink 21 and heat sink patches 22. The outer surface of the heat sink 21 has an elongated groove 213 along the length direction of the battery cell module, and the elongated groove 213 is integrally connected to the heat sink 21. Both ends of the elongated groove 213 are provided with extensions 211, which extend out of the heat sink 21 and are respectively inserted into positioning grooves 11 provided on two end plates 1. Two heat sink patches 22 are provided, and both heat sink patches 22 are provided on the inner surface of the heat sink 21 and are located on both sides of the elongated groove 213 along the height direction of the battery cell module. Each heat sink patch 22 is in contact with the battery cell module.

[0033] When the battery module charges and discharges, it generates heat. Since the battery module consists of multiple cells spaced apart, there are gaps between adjacent cells. However, these gaps are usually filled with sealant, preventing the heat from being quickly dissipated. The heat sink 22 contacts the battery module, and its placement allows it to quickly conduct the heat generated by the cells to the heat sink 21. Finally, the heat is dissipated through the heat dissipation mechanism.

[0034] Specifically, the extension 211 allows for an additional connection between the heat sink 21 and the end plate 1, preventing the heat sink 21 from falling off.

[0035] Based on the above embodiment, the positioning groove 11 is located at the middle position of the end plate 1 along the height direction of the end plate 1.

[0036] The placement of the positioning groove 11 in the middle position allows the heat-conducting component 2 to be more adaptable during placement. It does not require distinguishing the installation direction; it only requires distinguishing the front and back sides for quick installation.

[0037] In other embodiments, the elongated groove 213 is located in the middle of the heat sink 21 along the height direction of the battery cell module.

[0038] The elongated groove 213 is located in the middle of the heat sink 21, which makes it easier to install with the end plate 1. During the installation process, it is only necessary to distinguish the front and back of the heat sink 21 to install it smoothly in the positioning groove 11, which increases work efficiency.

[0039] In some embodiments, the inner surface of the heat sink 21 is provided with an mounting groove for the heat sink 22 to be mounted. The mounting groove can prevent the heat sink 22 from detaching from the heat sink 21 during use, thereby affecting the heat dissipation of the battery cell module.

[0040] Please see Figures 3 to 5 Specifically, the heat sink 21 has two folded edges 212 along its length. The folded edges 212 and the long groove 213 allow the heat sink 21 to form an mounting groove for accommodating the heat sink 22, so that the heat sink 22 can be better placed on the heat sink 21 and prevent the heat sink 22 from detaching from the heat sink 21 during use and affecting the heat dissipation of the battery module.

[0041] In other embodiments, the heat sink 21 is made of sheet metal of aluminum alloy.

[0042] In some possible embodiments, the heat dissipation patch 22 is a rectangular sheet made of phase change material.

[0043] In some possible embodiments, the end plate 1 has a hollow structure inside, which can reduce the weight of the overall battery pack.

[0044] In other embodiments, the heat dissipation patch 22 is a phase change material.

[0045] Phase change materials (PCMs) are substances that can change their state of matter and provide latent heat while maintaining a constant temperature.

[0046] Principle: Taking solid-liquid phase change as an example, when heated to the melting temperature, a phase change occurs from solid to liquid. During the melting process, the phase change material absorbs and stores a large amount of latent heat. When cooled, the stored heat is dissipated into the environment within a certain temperature range, resulting in a reverse phase change from liquid to solid. The energy stored or released during these two phase change processes is called the latent heat of phase change.

[0047] Therefore, the heat dissipation patch 22, made of phase change material, can not only conduct heat generated by the battery cell module, but also keep the battery cell module warm. When the temperature is too low, the heat dissipation patch 22 releases heat to maintain the normal operating temperature of the battery cell module.

[0048] Based on the above embodiments, an upper cover plate 3 is also provided above the battery cell module. The upper cover plate 3 is used to cover the battery cell module to prevent water from entering the battery cell module and increase the stability of the battery pack.

[0049] 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 and improvements 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 heat-dissipating battery pack, characterized in that, include: Battery cell module; The battery cell module has two end plates, which are located at both ends of the battery cell module. Two heat-conducting components are provided, which are respectively disposed on both sides of the battery cell module along the width direction of the battery cell module and in contact with the two side walls of the battery cell module; both heat-conducting components are located between the two end plates and correspond to the heat dissipation mechanism; the heat-conducting components are used to absorb the heat inside the battery cell module in a timely manner and dissipate the heat to the external heat dissipation mechanism. The steel strip is used to bind the assembly formed by the battery cell module, the two end plates, and the two heat-conducting components.

2. A heat dissipation battery pack as described in claim 1, characterized in that, The heat-conducting component includes: The heat sink has an outer plate surface with a long groove along the length of the battery cell module, the long groove being integrally connected to the heat sink; both ends of the long groove are provided with extensions, the extensions extending out of the heat sink, and the two extensions respectively extending into positioning grooves provided on the two end plates; Two heat dissipation pads are provided, both of which are disposed on the inner surface of the heat dissipation plate and are located on both sides of the elongated groove along the height direction of the battery cell module; each heat dissipation pad is in contact with the battery cell module.

3. A heat dissipation battery pack as described in claim 2, characterized in that, The positioning groove is located at the middle position of the end plate along the height direction of the end plate.

4. A heat dissipation battery pack as described in claim 3, characterized in that, The elongated groove is located in the middle of the heat sink along the height direction of the battery module.

5. A heat dissipation battery pack as described in claim 4, characterized in that, The inner surface of the heat sink is provided with mounting grooves for mounting the heat sink pads.

6. A heat dissipation battery pack as described in claim 2, characterized in that, The heat sink is made of sheet metal of aluminum alloy.

7. A heat dissipation battery pack as described in claim 2, characterized in that, The heat dissipation patch is a rectangular sheet made of phase change material.

8. A heat dissipation battery pack as described in claim 1, characterized in that, The end plate has a hollow structure inside.

9. A heat dissipation battery pack as described in claim 2, characterized in that, The heat dissipation patch is a phase change material.

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