CN221552002U - Heat exchange device and battery system - Google Patents

Abstract

The utility model discloses a heat exchange device and a battery system, including a heat exchange plate body; the heat exchange plate body includes a first heat exchange cavity, the first heat exchange cavity is formed by the first heat exchange plate and the second heat exchange plate being arranged oppositely, and the first heat exchange cavity is divided into a plurality of first heat exchange channels by a plurality of first partitions; the first partition is provided with a first exhaust channel along the thickness direction of the heat exchange plate body. The first partition divides the first heat exchange cavity into a plurality of first heat exchange channels, so that the heat exchange medium can be distributed throughout the first heat exchange cavity, the temperature difference of the heat exchange medium in the first heat exchange cavity is smaller, and the heat can be transferred more evenly; the first exhaust channel is used to discharge the flammable gas or toxic gas released by the battery cell stack on one side of the heat exchange device, and the first exhaust channel is arranged on the first partition, which can not only fit the battery cell stack tightly, but also be independent of the first heat exchange channel and do not affect each other, so as to maximize the use of the space of the heat exchange device and avoid the decrease of the energy density of the battery module.

Description

Heat exchange device and battery system

Technical Field

The utility model relates to the field of batteries, and in particular to a heat exchange device and a battery system.

Background Art

In order to avoid thermal runaway and the impact of thermal runaway, a heat dissipation component such as a direct cooling plate or a liquid cooling plate is usually installed in the battery module to reduce the temperature, and an exhaust channel is designed to prepare for the discharge of toxic gases in the event of thermal runaway. However, the existing liquid cooling plate has a complex pipeline design and a large volume, and the arrangement of the liquid cooling channel and the exhaust channel is not reasonable, which affects the overall performance of the battery module.

For example, the Chinese utility model patent with publication number CN 218101448 U discloses a cooling exhaust assembly in which an exhaust channel is provided between the liquid cooling plate and the air guide plate. The large volume wastes the space of the battery module, and the cooling exhaust assembly is placed at the bottom of the battery module and can only conduct heat from bottom to top. It is difficult to balance the heat transfer between the upper and lower parts of the battery module, and the heat exchange effect is poor.

Utility Model Content

The main purpose of the present application is to provide a heat exchange device and a battery system, aiming to solve the technical problem that the existing liquid cooling channels and exhaust channels are not arranged reasonably, resulting in poor heat exchange effect.

In order to achieve the above-mentioned utility model object, the utility model provides a heat exchange device, including a heat exchange plate body;

The heat exchange plate body includes a first heat exchange cavity, which is formed by the first heat exchange plate and the second heat exchange plate being arranged opposite to each other. The first heat exchange cavity is divided into a plurality of first heat exchange channels by a plurality of first partitions; at least one of the first partitions is provided with a first exhaust channel along the thickness direction of the heat exchange plate body.

Furthermore, the heat exchange plate body further comprises a second heat exchange cavity stacked with the first heat exchange cavity, and the second heat exchange cavity is formed by the third heat exchange plate and the fourth heat exchange plate being arranged oppositely;

The second heat exchange chamber is divided into a plurality of second heat exchange channels by a plurality of the second partitions;

At least one of the second partition plates is provided with the second exhaust passage along the thickness direction of the heat exchange plate body;

A third exhaust channel is provided between the second heat exchange plate and the third heat exchange plate; the first exhaust channel, the second exhaust channel and the third exhaust channel are in communication.

Furthermore, the heat exchange device further comprises a heating component, a heating cavity is provided between the second heat exchange plate and the third heat exchange plate, and the heating component is installed in the heating cavity.

Furthermore, it also includes a third partition plate, which divides the heating chamber into a plurality of heating sub-chambers and a plurality of the third exhaust channels.

Furthermore, the third exhaust channel is spaced apart from the heating sub-chamber.

Furthermore, it also includes a first plug and a second plug, wherein the first plug is sealed at both ends of the first heat exchange cavity, and the second plug is sealed at both ends of the second heat exchange cavity.

Furthermore, it also includes a first water inlet pipe, a first water outlet pipe, a second water inlet pipe and a second water outlet pipe, wherein a first flow channel is respectively reserved between the two ends of the first partition and the first plug; a second flow channel is respectively reserved between the two ends of the second partition and the second plug; the first water inlet pipe and the first water outlet pipe are respectively arranged on the side of the first heat exchange plate away from the heating chamber and have opposite ends of the first flow channel; the second water inlet pipe and the second water outlet pipe are respectively arranged on the side of the fourth heat exchange plate away from the heating chamber and have opposite ends of the second flow channel.

Furthermore, it also includes an upper end plate and a lower end plate, the upper end plate is connected to one side of the first heat exchange plate, the second heat exchange plate, the third heat exchange plate and the fourth heat exchange plate; the lower end plate is connected to the other side of the first heat exchange plate, the second heat exchange plate, the third heat exchange plate and the fourth heat exchange plate.

Furthermore, the heat exchange plate body, the first baffle, the second baffle, the third baffle, the upper end plate and the lower end plate are integrally formed by an extrusion process.

On the other hand, the utility model proposes a battery system, including the heat exchange device described in any of the above embodiments, and also including a battery cell stack and a battery case. A plurality of the battery cell stacks are connected by tabs and installed inside the battery case. The heat exchange device is arranged on one side of the battery cell stack parallel to the direction of the tab connection.

Furthermore, refrigerant or heat exchange liquid flows through the first heat exchange channel and the second heat exchange channel.

Beneficial effects:

A heat exchange device and a battery system of the utility model include a heat exchange plate body; the heat exchange plate body includes a first heat exchange cavity, the first heat exchange cavity is formed by the relative arrangement of a first heat exchange plate and a second heat exchange plate, the first heat exchange cavity is divided into a plurality of first heat exchange channels by a plurality of first partitions; the first partition is provided with a first exhaust channel along the thickness direction of the heat exchange plate body. The first partition divides the first heat exchange cavity into a plurality of first heat exchange channels, so that the heat exchange medium can be distributed throughout the first heat exchange cavity, the temperature difference of the heat exchange medium in the first heat exchange cavity is smaller, and the heat can be transferred more evenly; the first exhaust channel is used to discharge the flammable gas or toxic gas released by the battery cell stack on one side of the heat exchange device, and the first exhaust channel is arranged on the first partition, which can not only fit the battery cell stack tightly, but also be independent of the first heat exchange channel and do not affect each other, so as to maximize the use of the space of the heat exchange device and avoid the decrease of the energy density of the battery module.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a heat exchange device in an embodiment of the present utility model;

FIG2 is a partial schematic diagram of a heat exchange device in an embodiment of the present utility model;

FIG3 is a schematic diagram of the overall structure of a heat exchange device in an embodiment of the present utility model;

FIG4 is a schematic structural diagram of a heat exchange device installed on one side of a battery cell stack in one embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a battery system in an embodiment of the present utility model.

in:

1. Heat exchange plate body; 101. first heat exchange plate; 102. second heat exchange plate; 103. third heat exchange plate; 104. fourth heat exchange plate;

11. first heat exchange chamber; 110. first baffle; 111. first heat exchange channel;

12. second heat exchange chamber; 120. second baffle; 121. second heat exchange channel;

13. Heating chamber; 130. Third partition; 131. Heating sub-chamber;

141, a first exhaust channel; 142, a second exhaust channel; 143, a third exhaust channel;

151, upper end plate; 152, lower end plate;

21. First plug; 22. Second plug;

31. First water inlet pipe; 32. First water outlet pipe; 33. Second water inlet pipe; 34. Second water outlet pipe;

4. Battery cell stack;

5. Battery box.

The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

DETAILED DESCRIPTION

It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

1 to 3 , an embodiment of the present utility model provides a heat exchange device, including a heat exchange plate body 1;

The heat exchange plate body 1 includes a first heat exchange cavity 11, which is formed by a first heat exchange plate 101 and a second heat exchange plate 102 arranged opposite to each other. The first heat exchange cavity 11 is divided into a plurality of first heat exchange channels 111 by a plurality of first partitions 110; at least one of the first partitions 110 is provided with the first exhaust channel 141 along the thickness direction of the heat exchange plate body 1.

In this embodiment, at least one first partition 110 divides the first heat exchange chamber 11 into multiple first heat exchange channels 111, so that the heat exchange medium can be distributed throughout the first heat exchange chamber 11, and the temperature difference of the heat exchange medium in the first heat exchange chamber 11 is smaller, so that heat can be transferred more evenly; at least one first partition 110 is provided with a first exhaust channel 141 along the thickness direction of the heat exchange plate body 1, and the first exhaust channel 141 is used to discharge the flammable gas or toxic gas released by the battery cell stack 4 on one side of the heat exchange device. The first exhaust channel 141 is provided on the first partition 110, which can not only fit tightly with the battery cell stack 4, but also be independent of the first heat exchange channel 111 and do not affect each other, thereby maximizing the use of the space of the heat exchange device and avoiding a decrease in the energy density of the battery module.

In the above embodiment, since the height of the heat exchange device is consistent with the battery cell stack 4, the number of the first heat exchange channels 111 and the second heat exchange channels 121 can be set according to the height of the battery cell stack 4. The higher the height of the battery cell stack 4, the more first heat exchange channels 111 and first exhaust channels 141 are set, which is more conducive to rapid heat exchange.

In one embodiment, the heat exchange plate body 1 also includes a second heat exchange chamber 12 stacked with the first heat exchange chamber 11, and the second heat exchange chamber 12 is formed by a third heat exchange plate 103 and a fourth heat exchange plate 104 arranged opposite to each other; the second heat exchange chamber 12 is divided into a plurality of second heat exchange channels 121 by a plurality of second partitions 120; the second partition 120 is provided with a second exhaust channel 142 along the thickness direction of the heat exchange plate body 1; a third exhaust channel 143 is provided between the second heat exchange plate and the third heat exchange plate; the first exhaust channel 141, the second exhaust channel 142 and the third exhaust channel 143 are connected.

In this embodiment, the first partition 110 and the second partition 120 respectively separate the first heat exchange chamber 11 and the second heat exchange chamber 12 into a plurality of first heat exchange channels 111 and second heat exchange channels 121, so that the heat exchange medium can be distributed throughout the first heat exchange chamber 11 and the second heat exchange chamber 12. The temperature difference of the heat exchange medium in the first heat exchange chamber 11 and the second heat exchange chamber 12 is smaller, and heat can be transferred more evenly.

In the above embodiment, at least one of the second baffles 120 is provided with the second exhaust channel 142 along the thickness direction of the heat exchange plate body 1; the third exhaust channel 143 is located between the second heat exchange plate 102 and the third heat exchange plate 103; the first exhaust channel 141 is connected to the second exhaust channel 142 and the third exhaust channel 143; that is, the first heat exchange plate 101 and the second heat exchange plate 102 are provided with a plurality of first exhaust channels 141 penetrating the first baffle 110 along the length direction of the first baffle 110, and the third heat exchange plate 103 and the fourth heat exchange plate 104 are provided with a plurality of first exhaust channels 141 penetrating the first baffle 110 along the length direction of the second baffle 120 The second exhaust channel 142 of the second partition, since the first exhaust channel 141 passes through the first partition 110; the second exhaust channel 142 passes through the second partition 120, the two sides of the heat exchange device can be connected to the third exhaust channel 143. When thermal runaway occurs, the flammable gas or toxic gas released by the battery cell stack 4 on one side of the heat exchange device can enter the third exhaust channel 143 along the first exhaust channel 141 or the second exhaust channel 142, and be quickly discharged from both ends of the third exhaust channel 143, avoiding safety hazards such as explosion and fire. The number of the first exhaust channel 141, the second exhaust channel 142 and the third exhaust channel 143 can also be set by yourself.

It can be understood that the positions of the first partition 110 and the second partition are not limited, the positions of the first exhaust channel 141 and the second exhaust channel 142 are not limited, the first partition 110 and the second partition can be on the same horizontal line, and the first exhaust channel 141 and the second exhaust channel 142 can be arranged relatively to each other, at this time the exhaust efficiency is the highest.

In the above embodiment, a heating chamber 13 is provided between the second heat exchange plate 102 and the third heat exchange plate 103 , and the heating assembly is installed in the heating chamber 13 .

In the above embodiment, a heating chamber 13 is provided between the stacked first heat exchange chamber 11 and the second heat exchange chamber 12. The heating component in the heating chamber 13 can directly exchange heat with the heat exchange medium in the first heat exchange chamber 11 and the second heat exchange chamber 12 on both sides. The circulating heat exchange medium continuously transfers heat to the battery system. The heat exchange device can heat or cool the battery cell stacks 4 on both sides at the same time, and quickly take away the heat of the battery system when heat dissipation is needed. The heating effect is better in a cold environment, so that the battery system can transfer heat more quickly and evenly.

In the above embodiment, the heating component includes a PTC heating element, which is a positive temperature coefficient thermistor, usually made of oxide ceramic powder, with high insulation performance and stable electrical performance. The PTC heating element is arranged in the heat exchange plate body 1, and the PTC heating element is heated by supplying power to the PTC heating element. Since the PTC heating element is in contact with the first heat exchange cavity 11 and the second heat exchange cavity 12, the PTC heating component can heat the refrigerant in the first heat exchange cavity 11 and the second heat exchange cavity 12, and the heated refrigerant exchanges heat with the battery cell stack 4, thereby achieving the purpose of heating the battery cell stack 4 and ensuring the performance of the battery system.

When the battery cell stack 4 needs to be cooled, the heating component stops supplying power. When the cooling medium is refrigerant, the refrigerant flowing in the first heat exchange chamber 11 and the second heat exchange chamber 12 absorbs the heat of the battery cell stack 4 and evaporates continuously, and finally turns into gas and returns to the compressor through the expansion valve to complete the whole cycle; when the cooling medium is water or other coolant, water or other coolant continuously flows into the first heat exchange chamber 11 and the second heat exchange chamber 12, absorbs heat and then flows out, taking the heat away to complete the cycle.

In the above embodiment, the heat exchange device further includes a third partition plate 130, and the third partition plate 130 divides the heating chamber 13 into a plurality of heating sub-chambers 131 and a plurality of the third exhaust channels 143. A heating component is placed in each heating sub-chamber 131, and the heating component is separated from the third exhaust channel 143 by the third partition plate 130, so that the heating effect and the exhaust function of the heat exchange device do not interfere with each other.

In the above embodiment, the third exhaust channel 143 is spaced apart from the heating sub-cavity 131. The heating assembly is placed in the heating sub-cavity 131, and the spacing makes the third exhaust channel 143 and the heating sub-cavity 131 more evenly distributed, and the exhaust effect and heating effect of the heat exchange device are optimized.

In the above embodiment, the heat exchange device further includes a first plug 21 and a second plug 22, wherein the first plug 21 is sealed at both ends of the first heat exchange chamber 11, and the first plug 21 is sealed at both ends of the second heat exchange chamber 12. The first plug 21 is sealed at the first heat exchange chamber 11, and the first plug 21 is sealed at both ends of the second heat exchange chamber 12 to prevent leakage of the heat exchange medium and enhance the heat exchange effect.

In the above embodiment, the heat exchange device also includes a first water inlet pipe 31, a first water outlet pipe 32, a second water inlet pipe 33 and a second water outlet pipe 34, wherein a first flow channel is respectively reserved between the two ends of the first partition 110 and the first plug 21; a second flow channel is respectively reserved between the two ends of the second partition 120 and the second plug 22; the first water inlet pipe 31 and the first water outlet pipe 32 are respectively arranged on the side of the first heat exchange plate 101 away from the heating chamber 13 and have opposite ends of the first flow channel; the second water inlet pipe 33 and the second water outlet pipe 34 are respectively arranged on the side of the fourth heat exchange plate 104 away from the heating chamber 13 and have opposite ends of the second flow channel.

The heat exchange medium between the multiple first heat exchange channels 111 of the first heat exchange chamber 11 flows through the first flow channel, and the heat exchange medium between the multiple second heat exchange channels 121 of the second heat exchange chamber 12 flows through the second flow channel; the first water inlet pipe 31 and the first water outlet pipe 32 are respectively arranged on the side of the first heat exchange plate away from the heating chamber 13 and at opposite ends of the first flow channel, so as to facilitate the introduction of heat exchange medium. The heat exchange medium enters from the first water inlet pipe 31, flows through the first heat exchange chamber 11, and then flows out from the first water outlet pipe 32 at the other end through the first flow channel. Only one first water outlet pipe 32 and the first water inlet pipe 31 are needed to control the entry and exit of the heat exchange medium in the multiple first heat exchange channels 111, thereby achieving uniform heat exchange and saving costs; the second water inlet pipe 33 and the second water outlet pipe 34 are the same. In another embodiment, both ends of the first partition 110 are fitted with the first plug 21, and both ends of the second partition 120 are fitted with the second plug 22, that is, each first heat exchange channel 111 and the second heat exchange channel 121 are independent and not interconnected, and only need to set up a water inlet pipe and a water outlet pipe respectively, which has higher heat exchange efficiency.

In one embodiment, the heat exchange device further includes an upper end plate 151 and a lower end plate 150, wherein the upper end plate 151 connects one side of the first heat exchange plate 101, the second heat exchange plate 102, the third heat exchange plate 103 and the fourth heat exchange plate 104; and the lower end plate 152 connects the other side of the first heat exchange plate 101, the second heat exchange plate 102, the third heat exchange plate 103 and the fourth heat exchange plate 104. The arrangement of the upper end plate 151 and the lower end plate 152 makes the structure of the entire heat exchange device more stable.

In the above embodiment, the heat exchange plate body 1, the first baffle 110, the second baffle 120, the third baffle 130, the upper end plate 151 and the lower end plate 152 are integrally formed by an extrusion process. The heat exchange plate body 1, the first baffle 110, the second baffle 120, the upper end plate 151 and the lower end plate 152 are integrally formed by extrusion of an aluminum profile plate. The heat exchange plate body 1 made of aluminum has good thermal conductivity, and the extrusion molding process is relatively mature. Various complex shapes can be processed by extrusion molding, with high production efficiency, easy processing and low cost.

Referring to Fig. 4-Fig. 5, the utility model proposes a battery system on the other hand, including the heat exchange device described in any of the above embodiments, and also including a battery cell stack 4 and a battery box 5, wherein a plurality of battery cell stacks 4 are connected by tabs and installed inside the battery box 5, and the heat exchange device is arranged on one side of the battery cell stack 4 parallel to the direction of the tab connection. The heat exchange device installed on one side of the battery cell stack 4 not only plays the role of heat exchange, but also can serve as a longitudinal beam or cross beam of the battery box 5, thereby improving the strength and modality of the battery system, saving space and reducing costs.

In the above embodiment, refrigerant or heat exchange liquid flows in the first heat exchange channel 111 and the second heat exchange channel 121. The refrigerant or heat exchange liquid can take away heat at room temperature to cool the battery cell stack 4. When the battery cell stack 4 needs to be heated in a cold environment, the heating component generates heat to heat up the refrigerant or heat exchange liquid and transfer heat to the battery cell stack 4 to achieve heating.

The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims (11)

1. A heat exchange device, characterized in that it comprises a heat exchange plate body; The heat exchange plate body includes a first heat exchange cavity, which is formed by the first heat exchange plate and the second heat exchange plate being arranged opposite to each other. The first heat exchange cavity is divided into a plurality of first heat exchange channels by a plurality of first partitions; at least one of the first partitions is provided with a first exhaust channel along the thickness direction of the heat exchange plate body. 2. The heat exchange device according to claim 1, characterized in that the heat exchange plate body further comprises a second heat exchange cavity stacked with the first heat exchange cavity, and the second heat exchange cavity is formed by a third heat exchange plate and a fourth heat exchange plate arranged oppositely; The second heat exchange chamber is divided into a plurality of second heat exchange channels by a plurality of second partitions; At least one of the second partitions is provided with a second exhaust passage along the thickness direction of the heat exchange plate body; A third exhaust channel is provided between the second heat exchange plate and the third heat exchange plate; the first exhaust channel, the second exhaust channel and the third exhaust channel are in communication. 3. The heat exchange device according to claim 2 is characterized in that the heat exchange device also includes a heating component, a heating cavity is provided between the second heat exchange plate and the third heat exchange plate, and the heating component is installed in the heating cavity. 4. The heat exchange device according to claim 3 is characterized in that it also includes a third partition plate, wherein the third partition plate divides the heating chamber into a plurality of heating sub-chambers and a plurality of the third exhaust channels. 5 . The heat exchange device according to claim 4 , wherein the third exhaust channel is spaced apart from the heating sub-chamber. 6. The heat exchange device according to claim 4 is characterized in that it also includes a first plug and a second plug, the first plug is sealed at both ends of the first heat exchange cavity, and the second plug is sealed at both ends of the second heat exchange cavity. 7. The heat exchange device according to claim 6 is characterized in that it also includes a first water inlet pipe, a first water outlet pipe, a second water inlet pipe and a second water outlet pipe, wherein a first flow channel is respectively reserved between the two ends of the first partition and the first plug; a second flow channel is respectively reserved between the two ends of the second partition and the second plug; the first water inlet pipe and the first water outlet pipe are respectively arranged on the side of the first heat exchange plate away from the heating chamber and have opposite ends of the first flow channel; the second water inlet pipe and the second water outlet pipe are respectively arranged on the side of the fourth heat exchange plate away from the heating chamber and have opposite ends of the second flow channel. 8. The heat exchange device according to claim 4 is characterized in that it also includes an upper end plate and a lower end plate, wherein the upper end plate is connected to one side of the first heat exchange plate, the second heat exchange plate, the third heat exchange plate and the fourth heat exchange plate; and the lower end plate is connected to the other side of the first heat exchange plate, the second heat exchange plate, the third heat exchange plate and the fourth heat exchange plate. 9 . The heat exchange device according to claim 8 , wherein the heat exchange plate body, the first baffle, the second baffle, the third baffle, the upper end plate and the lower end plate are integrally formed by an extrusion process. 10. A battery system, characterized in that it comprises the heat exchange device according to any one of claims 1 to 9, and also comprises a battery cell stack and a battery case, wherein a plurality of the battery cell stacks are connected by tabs and installed inside the battery case, and the heat exchange device is arranged on one side of the battery cell stack parallel to the direction of the tab connection. 11 . The battery system according to claim 10 , wherein a refrigerant or a heat exchange liquid flows through the first heat exchange channel and the second heat exchange channel.