Heat exchange assembly and battery pack

Abstract

The utility model discloses a heat exchange assembly and a battery pack, and relates to the technical field of battery heat exchange, the heat exchange assembly comprises a heat exchange piece and an isolation piece, and the heat exchange piece is provided with a liquid cavity, a liquid inlet and a liquid outlet which are communicated. The isolation piece is arranged in the liquid cavity, the thickness direction of the isolation piece is parallel to the thickness direction of the heat exchange piece, the two opposite sides of the isolation piece in the thickness direction are connected with the two opposite cavity walls of the liquid cavity correspondingly, and the isolation piece divides the liquid cavity into a first cavity body and a second cavity body. The liquid inlet of the heat exchange part can be used for heat exchange liquid to enter the liquid cavity, and the liquid outlet can be used for heat exchange liquid output so that heat exchange can be conducted on the liquid cavity. The two opposite sides of the isolation piece in the thickness direction are connected with the two opposite cavity walls of the liquid cavity respectively, no redundant gap exists between the isolation piece and the liquid cavity, the thickness of the heat exchange piece can reach the minimum size, and occupied space is small. And the heat exchange piece does not occupy more space after being connected with a plurality of batteries, so that the use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of battery heat exchange technology, specifically to a heat exchange component and a battery pack. Background Technology

[0002] New energy electric vehicles primarily rely on their internal battery packs for power and range. These battery packs typically contain multiple lithium batteries. Lithium batteries generate considerable heat during operation, which needs to be dissipated quickly to prevent malfunctions. Currently, a common heat dissipation method is coolant heat exchange, where coolant flows through the lithium batteries to carry away their heat.

[0003] Prior art, disclosed in publication CN107394315A, includes a heat dissipation device and a battery module. The heat dissipation device comprises a body, an isolation structure, a liquid inlet, and a liquid outlet. The body and isolation structure are hollow. The isolation structure is disposed within the body and forms multiple receiving structures with the body. Batteries are disposed within these multiple receiving structures. The liquid inlet is located within the body, and the liquid outlet is located on the body away from the liquid inlet. The liquid inlet, liquid outlet, isolation structure, and body are connected. This invention also provides a battery module comprising multiple batteries, coolant, and the aforementioned heat dissipation device. The body and isolation structure are filled with coolant, enabling comprehensive and reliable cooling of the multiple batteries and improving the heat dissipation performance of the heat dissipation device.

[0004] However, the existing battery heat dissipation device still has shortcomings. For example, its isolation structure does not contact the inner wall of the heat dissipation body, and there is a certain distance between the two, which requires the heat dissipation body to be thicker and occupies a lot of space. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a heat exchange component and battery pack to solve the technical problem that in the prior art, the isolation structure of the battery heat dissipation device does not contact the inner wall of the heat dissipation body, and there is a certain distance between the two, which leads to the need to set a large thickness of the heat dissipation body and occupy a large space.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, this utility model provides a heat exchange component, comprising:

[0008] The heat exchanger has a connected liquid chamber, an inlet, and an outlet; and

[0009] An isolator is disposed in the liquid cavity. The thickness direction of the isolator is parallel to the thickness direction of the heat exchanger. The opposite sides of the isolator in the thickness direction are respectively connected to the opposite two cavity walls of the liquid cavity. The opposite sides of the isolator and the inner wall of the liquid cavity respectively form a first cavity and a second cavity. One end of the first cavity and the second cavity are both connected to the liquid inlet, and the other end of both are connected to the liquid outlet.

[0010] In some embodiments, one side of the isolation member has a plurality of protruding ridges, each of which is connected to the cavity wall of the liquid cavity. A first flow channel is formed between adjacent ridges, and the plurality of first flow channels together form the first cavity.

[0011] In some embodiments, a plurality of the protrusions are connected to the bottom wall of the liquid cavity, the bottom wall is disposed opposite to the top wall, and the protrusions are recessed on the opposite side of the isolation member to form a second flow channel, and a plurality of the second flow channels are spaced apart and together form the second cavity.

[0012] In some embodiments, the liquid inlet and the liquid outlet are located on the same side of the heat exchanger, and both the first flow channel and the second flow channel are curved.

[0013] In some embodiments, the cavity wall of the liquid chamber has a positioning strip, and the isolation member has a slot that engages with the positioning strip.

[0014] In some embodiments, the heat exchange assembly further includes a liquid inlet connector disposed on the heat exchange member, the outlet of the liquid inlet connector being connected to the liquid inlet, the liquid inlet connector being funnel-shaped, with an outlet at the larger end and an inlet at the smaller end.

[0015] In some embodiments, the heat exchange assembly further includes a mounting member, which is located on both sides of the heat exchange assembly, and the mounting member and the liquid inlet connector are connected by screws passing through the heat exchange assembly.

[0016] Secondly, the present invention also provides a battery pack, including multiple batteries and the aforementioned heat exchange component, wherein the batteries are connected to opposite sides of the heat exchange component.

[0017] In some embodiments, the number of heat exchange components is multiple, and multiple batteries and multiple heat exchange components are sequentially and alternately connected in the thickness direction of the battery.

[0018] In some embodiments, the battery pack further includes a liquid tank, an inlet manifold, and an outlet manifold, wherein the outlet and inlet of the liquid tank are respectively connected to the inlet manifold and the outlet manifold, the inlet manifold is connected to a plurality of inlets, and the outlet manifold is connected to a plurality of outlets.

[0019] Compared with existing technologies, the heat exchange assembly provided by this utility model has an inlet for supplying heat exchange liquid into the liquid chamber and an outlet for supplying heat exchange liquid out, facilitating heat exchange within the liquid chamber. The two opposite sides of the separator in the thickness direction are connected to the two opposing cavity walls of the liquid chamber, with no extra gap between them, allowing the heat exchange assembly to achieve a minimum thickness and occupy little space. The heat exchange assembly does not occupy much additional space after being connected to multiple batteries, making it convenient to use. Furthermore, one end of both the first and second cavities is connected to the inlet, and the other end is connected to the outlet, allowing liquid entering from the inlet to simultaneously pass through both cavities before flowing out from the outlet. Compared to a structure where liquid flows sequentially through the inlet, first cavity, second cavity, and outlet, the heat exchange assembly of this application has significantly higher heat exchange efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the heat exchange component provided in this embodiment of the utility model;

[0021] Figure 2 This is a disassembly diagram of the heat exchange component provided in this embodiment of the utility model;

[0022] Figure 3 This is a cross-sectional schematic diagram of the heat exchange component provided in an embodiment of the present utility model;

[0023] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle;

[0024] Figure 5 This is a schematic diagram of the battery pack provided in this embodiment of the present invention when no battery is installed;

[0025] Figure 6 This is a schematic diagram of the battery pack provided in this embodiment of the present invention when the battery has been installed. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages 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 merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] To address the technical problem in existing battery heat dissipation devices where the isolation structure and the inner wall of the heat dissipation body are not in contact, leaving a certain distance between them, which results in a large thickness of the heat dissipation body and a large space occupation, this utility model provides a heat exchange component that enables the isolation component inside the heat exchange component to be directly connected to its cavity wall, with no extra gap between them, thus minimizing the thickness of the heat exchange component and occupying less space.

[0028] It should be noted that the heat exchange component described in this utility model is used in, but not limited to, battery packs. For ease of explanation, this utility model only uses the application of the heat exchange component in a battery pack as an example. The principle of the heat exchange component applied in other types of equipment is essentially the same as that applied in a battery pack, and will not be described in detail here.

[0029] Please see Figures 1 to 4 , Figure 1 This is a schematic diagram of the structure of a heat exchange component in one embodiment of the present invention. The heat exchange component includes a heat exchange element 1 and an isolation element 2. The heat exchange element 1 has a liquid cavity, a liquid inlet 12 and a liquid outlet 13 that are connected to each other.

[0030] The isolator 2 is disposed in the liquid cavity, and the thickness direction of the isolator 2 is parallel to the thickness direction of the heat exchanger 1. The opposite sides of the isolator 2 in the thickness direction are respectively connected to the opposite cavity walls of the liquid cavity, and the isolator 2 divides the liquid cavity into a first cavity 111 and a second cavity 112. One end of the first cavity 111 and the second cavity 112 are both connected to the liquid inlet 12, and the other end is both connected to the liquid outlet 13, so that the liquid entering from the liquid inlet 12 can simultaneously pass through the first cavity 111 and the second cavity 112, and then flow out from the liquid outlet 13. Compared with the structure in which the liquid flows sequentially from the liquid inlet 12, the first cavity 111, the second cavity 112, and the liquid outlet 13, the heat exchange efficiency of the heat exchanger 2 in this embodiment is significantly higher.

[0031] In this embodiment, the opposite sides of the heat exchange component 1 in the thickness direction are used to connect batteries so as to facilitate heat exchange for multiple batteries at the same time, such as removing heat from the batteries to dissipate heat from the batteries; or conducting heat to the batteries, such as preheating the batteries in cold winter so that the batteries can quickly enter the working state.

[0032] The heat exchanger 1 has an inlet 12 for allowing liquid to enter the first chamber 111 and the second chamber 112, and an outlet 13 for allowing liquid to exit from the first chamber 111 and the second chamber 112, facilitating heat exchange between the two chambers. The walls of both the first chamber 111 and the second chamber 112 are used to connect to the battery, enabling the liquid flowing through them to exchange heat with the battery. This embodiment, by providing an separator 2 to divide the liquid chamber into the first chamber 111 and the second chamber 112, achieves more uniform and rapid heat exchange with the battery. Compared to embodiments without separator 2, this embodiment has higher thermal conductivity.

[0033] The two opposite sides of the isolation element 2 in the thickness direction are respectively connected to the opposite cavity walls of the liquid cavity. There is no extra gap between the isolation element 2 and the cavity wall of the liquid cavity, which can minimize the thickness of the heat exchange element 1. The heat exchange element 1 occupies little space and is easy to use.

[0034] In one embodiment, please refer to Figure 2 and Figure 4 The isolator 2 has multiple protruding ribs 21 on one side, each rib 21 connected to the wall of the liquid chamber, for example, by welding. Adjacent ribs 21 are spaced apart to form first flow channels 1111, and these multiple first flow channels 1111 together form the aforementioned first cavity 111. In this embodiment, the isolator 2 is connected to the liquid chamber wall via the ribs 21, thereby reducing the thickness of the heat exchanger 1. Furthermore, the isolator 2 can also form first flow channels 1111 constituting the first cavity 111 through adjacent ribs 21, thus reserving liquid flow channels while simultaneously reducing the thickness of the heat exchanger 1; this structural design is extremely ingenious. It should be emphasized that the individual first flow channels 1111 do not flow into each other, and the multiple first flow channels 1111 do not interfere with each other, all capable of exchanging heat with the battery in contact with the heat exchanger 1. Liquid entering through inlet 12 can simultaneously flow into multiple first flow channels 1111. As the liquid passes through the first flow channels 1111, it can exchange heat with the battery in contact with the heat exchange component 1. Multiple first flow channels 1111 are beneficial to improving the efficiency of heat exchange.

[0035] In one embodiment, please refer to Figure 4Multiple protrusions 21 are connected to the bottom wall of the liquid cavity, with the bottom wall and top wall facing each other. The protrusions 21 are recessed on the opposite side of the separator 2 to form a second flow channel 1121. These multiple second flow channels 1121 are spaced apart and together form the aforementioned second cavity 112. In this embodiment, the back side of the first flow channel 1111 is connected to the cavity wall of the liquid cavity, minimizing the space occupied by the separator 2 and the thickness of the heat exchanger 2, thus minimizing its space requirement. Liquid entering through the inlet 12 can simultaneously flow into multiple second flow channels 1121. As the liquid passes through the second flow channels 1121, it can exchange heat with the battery in contact with the heat exchanger 1. The simultaneous heat exchange between the liquid in the multiple second flow channels 1121 and the battery improves heat exchange efficiency and uniformity.

[0036] In one embodiment, please refer to Figure 1 and Figure 2 The inlet 12 and outlet 13 are located on the same side of the heat exchanger 1, so that the water inlet pipe connecting the inlet 12 and the water outlet pipe connecting the outlet 13 can be installed on the same side of the heat exchanger 1, occupying little space and facilitating management. In this embodiment, the first flow channel 1111 and the second flow channel 1121 are both curved and formed by three sequentially perpendicular channels, roughly in an n-shape. Multiple first flow channels 1111 and multiple second flow channels 1121 are provided in the direction from the inside out of the isolation member 2. The dimensions of the multiple first flow channels 1111 and the multiple second flow channels 1121 increase progressively, so that all positions of the isolation member 2 are filled with flow channels, and the isolation member 2 is fully utilized.

[0037] In one embodiment, please refer to Figure 2 The cavity wall of the liquid chamber has a positioning strip 14, and the isolation member 2 has a slot 24, which engages with the positioning strip 14. In this embodiment, the isolation member 2 engages with the positioning strip 14 through the slot 24, so that the isolation member 2 can be installed and fixed in the heat exchange member 1, which helps to enhance the stability of the installation of the isolation member 2.

[0038] In one embodiment, please refer to Figure 2 The heat exchange assembly 100 also includes a liquid inlet connector 15 disposed on the heat exchange component 1. The outlet of the liquid inlet connector 15 is connected to the liquid inlet 12. The liquid inlet connector 15 is funnel-shaped, with an outlet at the larger end and an inlet at the smaller end. In this embodiment, the liquid inlet connector 15 is funnel-shaped, and the inlet at the smaller end is used to connect to a water inlet pipe, so that the water inlet pipe inputs liquid into the heat exchange component 1 through the liquid inlet head 15, and the liquid is output from the outlet at the larger end of the liquid inlet connector 15, which helps to improve the liquid output efficiency.

[0039] In addition, the heat exchange assembly 100 also includes a liquid outlet connector 16 disposed on the heat exchange component 1. The structure of the liquid outlet connector 16 is the same as that of the liquid inlet connector 15, both being funnel-shaped. However, the larger end of the liquid outlet connector 16 is connected to the liquid outlet 13 of the heat exchange component 1, and the smaller end is used to connect to the drain pipe so that the liquid inside the heat exchange component 1 can be discharged quickly.

[0040] In one embodiment, please refer to Figure 2 The heat exchange assembly 100 also includes a mounting member 17, which and the liquid inlet connector 15 are located on opposite sides of the heat exchange assembly 1, respectively. The mounting member 17 and the liquid inlet connector 15 are connected by screws passing through the heat exchange assembly 1. In this embodiment, the heat exchange assembly 1 includes a bottom shell 113 and a top shell 114, with a liquid cavity formed between the bottom shell 113 and the top shell 114. The heat exchange assembly 1 is located in the liquid cavity between the bottom shell 113 and the top shell 114. The bottom shell 113 is provided with the aforementioned positioning strip 14, which is used to engage with the slot of the heat exchange assembly 2 to position the heat exchange assembly 2. Both the bottom shell 113 and the top shell 114 have corresponding through holes for screws to pass through. The mounting member 17 and the liquid inlet connector 15, together with the screws, clamp the bottom shell 113 and the top shell 114 to complete the installation.

[0041] Please participate Figure 5 and Figure 6 Secondly, the present invention also provides a battery pack 200, including a plurality of batteries 3 and the aforementioned heat exchange assembly 100. The heat exchange assembly 100 has batteries connected to both sides of the heat exchange member 1, so that when the liquid flows through the first cavity 111 and the second cavity 112 inside the heat exchange member 1, it can simultaneously exchange heat with the batteries on both sides, thereby improving the heat exchange efficiency.

[0042] In one embodiment, please refer to Figure 6 There are multiple heat exchange components 100. In the thickness direction of the battery 3, multiple batteries 3 and multiple heat exchange components 1 are connected alternately in sequence so that heat exchange components 1 can be connected to both sides of the thickness direction of the battery 3, and batteries 3 can be connected to both sides of the thickness direction of the heat exchange components 1. The space can be fully utilized, and the heat exchange efficiency between the battery 3 and the heat exchange components 1 is high.

[0043] In one embodiment, please refer to Figure 5The battery pack 200 also includes a liquid tank 4, an inlet manifold 5, and an outlet manifold 6. The outlet and inlet of the liquid tank 4 are connected to the inlet manifold 5 and the outlet manifold 6, respectively. The inlet manifold 5 is connected to multiple inlets 12 of multiple heat exchange components 100, and the outlet manifold 6 is connected to multiple outlets 13. In this embodiment, the liquid tank 4 has liquid for heat exchange and a hydraulic pump for driving the liquid flow. When heat exchange with the battery 3 is required, the hydraulic pump can be activated to drive the liquid through the inlet manifold 5, and the liquid is input through the inlets 12 of multiple heat exchange components 100. After the liquid exchanges heat with the battery 3 through multiple heat exchange components 1, the liquid is discharged from the outlets 13 of multiple heat exchange components 1 to the outlet manifold 6 and flows back to the liquid tank 4 to facilitate liquid recovery and recycling. In addition, the liquid tank 4 can also be equipped with a heater to heat the liquid to a target temperature. When the liquid flows through the heat exchange components 1, it can exchange heat with the battery 3 to bring the battery 3 close to the target temperature.

[0044] To better understand this utility model, the following is combined with... Figures 1 to 6 The technical solution of this utility model is described in detail below:

[0045] The heat exchange assembly 100 provided by this utility model has an inlet 12 for supplying heat exchange liquid into the liquid chamber and an outlet 13 for supplying heat exchange liquid out, so as to facilitate heat exchange in the liquid chamber. The two opposite sides of the separator 2 in the thickness direction are respectively connected to the two opposite chamber walls of the liquid chamber, with no excess gap between them, allowing the thickness of the heat exchange assembly 1 to reach a minimum size and occupy little space. The heat exchange assembly 1 does not occupy much additional space after being connected to multiple batteries 3, making it convenient to use.

[0046] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A heat exchange assembly, characterized by, The heat exchange assembly comprises: a heat exchange piece, which is provided with a liquid cavity, a liquid inlet and a liquid outlet that are connected to each other; a separation piece, which is arranged in the liquid cavity, the thickness direction of the separation piece is parallel to the thickness direction of the heat exchange piece, the opposite sides of the separation piece in the thickness direction are connected to the opposite cavity walls of the liquid cavity respectively, the opposite sides of the separation piece and the inner walls of the liquid cavity form a first cavity and a second cavity respectively, one end of the first cavity and the second cavity is connected to the liquid inlet, and the other end of the first cavity and the second cavity is connected to the liquid outlet. One side of the separation piece is provided with a plurality of convexly arranged convex strips, the convex strips are connected to the top wall of the liquid cavity, the first flow channels are formed between the adjacent convex strips, and the first flow channels form the first cavity together.

2. The heat exchange assembly of claim 1, wherein, The convex strips are connected to the bottom wall of the liquid cavity, the bottom wall is arranged opposite to the top wall, the second flow channels are formed in the other side of the separation piece, the second flow channels are arranged at intervals and form the second cavity together.

3. The heat exchange assembly of claim 2, wherein, The liquid inlet and the liquid outlet are arranged on the same side of the heat exchange piece, and the first flow channels and the second flow channels are curved.

4. The heat exchange assembly of claim 3, wherein, The cavity wall of the liquid cavity is provided with a positioning strip, the separation piece is provided with a clamping groove, and the clamping groove is clamped and matched with the positioning strip.

5. The heat exchange assembly of claim 1, wherein, The heat exchange assembly further comprises a liquid inlet connector arranged on the heat exchange piece, the outlet of the liquid inlet connector is connected to the liquid inlet, the liquid inlet connector is funnel-shaped, and the end with a larger area is provided with an outlet, and the end with a smaller area is provided with an inlet.

6. The heat exchange assembly of claim 1, wherein, The heat exchange assembly further comprises a mounting piece, the mounting piece and the liquid inlet connector are arranged on the two sides of the heat exchange piece respectively, and the mounting piece and the liquid inlet connector are connected by a screw penetrating through the heat exchange piece.

7. The heat exchange assembly of claim 6, wherein, The heat exchange assembly comprises a plurality of batteries and the heat exchange assembly according to any one of claims 1-7, and the opposite sides of the heat exchange piece are connected to the batteries.

8. A battery pack, characterized by, The number of the heat exchange assemblies is multiple, and in the thickness direction of the batteries, the batteries and the heat exchange assemblies are connected alternately.

9. The battery pack of claim 8, wherein, ​

Images