CN221552002U - Heat exchange device and battery system - Google Patents

Abstract

The utility model discloses a heat exchange device and a battery system, comprising a heat exchange plate body; the heat exchange plate body comprises a first heat exchange cavity, the first heat exchange cavity is formed by the opposite arrangement of a first heat exchange plate and a second heat exchange plate, and the first heat exchange cavity is divided into a plurality of first heat exchange channels by a plurality of first partition plates; the first partition plate is provided with a first exhaust passage along the thickness direction of the heat exchange plate body. The first heat exchange cavity is divided into a plurality of first heat exchange channels by the first partition plate, so that heat exchange medium can spread over the first heat exchange cavity, and heat can be transferred more uniformly through smaller temperature difference of the heat exchange medium in the first heat exchange cavity; the first exhaust channel is used for exhausting combustible gas or toxic gas released by the battery cell stacking body at one side of the heat exchange device, and the first exhaust channel is arranged on the first partition plate and can be tightly attached to the battery cell stacking body, and is mutually independent of the first heat exchange channel without mutual influence, so that the space of the heat exchange device is utilized to the greatest extent, and the energy density reduction of the battery module is avoided.

Description

Heat exchange device and battery system

Technical Field

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

Background

In order to avoid thermal runaway and the influence of thermal runaway, a heat dissipation assembly such as a direct cooling plate or a liquid cooling plate is usually disposed in the battery module to cool down, and an exhaust channel is designed to provide for the emission of toxic gases during thermal runaway. However, the existing liquid cooling plate has complex pipeline design and large volume, and the arrangement of the liquid cooling channel and the exhaust channel is not reasonable enough, so that the overall performance of the battery module is affected.

For example, in the chinese patent of publication No. CN 218101448U, an exhaust channel is disposed between the liquid cooling plate and the air guide plate in the cooling exhaust component, which has a large volume, so that the space of the battery module is wasted, and the cooling exhaust component is disposed at the bottom of the battery module, so that heat can be conducted only from bottom to top, heat transfer from top to bottom of the battery module is difficult to be balanced, and heat exchange effect is poor.

Disclosure of utility model

The application mainly aims to provide a heat exchange device and a battery system, and aims to solve the technical problem that the heat exchange effect is poor due to the fact that the existing liquid cooling channel and an existing exhaust channel are not reasonably arranged.

In order to achieve the above object, one aspect of the present utility model provides a heat exchange device, including a heat exchange plate body;

The heat exchange plate body comprises a first heat exchange cavity, the first heat exchange cavity is formed by arranging a first heat exchange plate and a second heat exchange plate oppositely, and the first heat exchange cavity is divided into a plurality of first heat exchange channels by a plurality of first partition plates; at least one first partition plate is provided with a first exhaust passage along the thickness direction of the heat exchange plate body.

Further, the heat exchange plate body further comprises a second heat exchange cavity which is laminated with the first heat exchange cavity, and the second heat exchange cavity is formed by arranging a third heat exchange plate and a fourth heat exchange plate oppositely;

the second heat exchange cavity is divided into a plurality of second heat exchange channels by a plurality of second partition plates;

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

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

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

Further, a third partition is further included, the third partition dividing the heating chamber into a plurality of heating subchambers and a plurality of third exhaust passages.

Further, the third exhaust passage is spaced apart from the heating subchamber.

Further, the heat exchange device further comprises a first plug and a second plug, wherein the first plug is plugged at two ends of the first heat exchange cavity, and the first plug is plugged at two ends of the second heat exchange cavity.

Further, the device also comprises 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 passage is reserved between the two ends of the first partition board and the first plug respectively; a second overflow channel is reserved between the two ends of the second partition board and the second plug respectively; the first water inlet pipe and the first water outlet pipe are respectively arranged at one side of the first heat exchange plate far away from the heating cavity, and opposite ends of a first flow passage are reserved; the second water inlet pipe and the second water outlet pipe are respectively arranged at one side of the fourth heat exchange plate far away from the heating cavity and are provided with opposite ends of a second overflow channel.

Further, the heat exchanger further comprises an upper end plate and a lower end plate, wherein the upper end plate is connected with one side of the first heat exchange plate, one side of the second heat exchange plate, one side of the third heat exchange plate and one side of the fourth heat exchange plate; the lower end plate is connected with the other sides of the first heat exchange plate, the second heat exchange plate, the third heat exchange plate and the fourth heat exchange plate.

Further, the heat exchange plate body, the first partition plate, the second partition plate, the third partition plate, the upper end plate and the lower end plate are integrally formed through an extrusion process.

Another aspect of the present utility model provides a battery system, including the heat exchange device in any one of the above embodiments, and further including a plurality of battery cell stacks and a battery case, where the plurality of battery cell stacks are connected by tabs and installed in the battery case, and the heat exchange device is parallel to the direction in which the tabs are connected and is disposed on one side of the battery cell stacks.

Further, the first heat exchange channel and the second heat exchange channel are internally circulated with a refrigerant or heat exchange liquid.

The beneficial effects are that:

The utility model relates to a heat exchange device and a battery system, comprising a heat exchange plate body; the heat exchange plate body comprises a first heat exchange cavity, the first heat exchange cavity is formed by arranging a first heat exchange plate and a second heat exchange plate oppositely, and the first heat exchange cavity is divided into a plurality of first heat exchange channels by a plurality of first partition plates; the first partition plate is provided with a first exhaust passage along the thickness direction of the heat exchange plate body. The first heat exchange cavity is divided into a plurality of first heat exchange channels by the first partition plate, so that heat exchange medium can spread over the first heat exchange cavity, and heat can be transferred more uniformly through smaller temperature difference of the heat exchange medium in the first heat exchange cavity; the first exhaust channel is used for exhausting combustible gas or toxic gas released by the battery cell stacking body at one side of the heat exchange device, and the first exhaust channel is arranged on the first partition plate and can be tightly attached to the battery cell stacking body, and is mutually independent of the first heat exchange channel without mutual influence, so that the space of the heat exchange device is utilized to the greatest extent, and the energy density reduction of the battery module is avoided.

Drawings

FIG. 1 is a schematic view of a heat exchange device according to an embodiment of the present utility model;

FIG. 2 is a partial schematic view of a heat exchange device in an embodiment of the utility model;

FIG. 3 is a schematic view of the overall structure of a heat exchange device according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a heat exchange device according to an embodiment of the present utility model mounted on one side of a stack of cells;

Fig. 5 is a schematic view of a battery system according to an embodiment of the present utility model.

Wherein:

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

11. a first heat exchange chamber; 110. A first separator; 111. A first heat exchange channel;

12. a second heat exchange chamber; 120. A second separator; 121. A second heat exchange channel;

13. A heating chamber; 130. A third separator; 131. Heating the subchamber;

141. A first exhaust passage; 142. A second exhaust passage; 143. A third exhaust passage;

151. an upper end plate; 152. A lower end plate;

21. a first plug; 22. a second plug;

31. A first water inlet pipe; 32. a first water outlet pipe; 33. a second water inlet pipe; 34. a second water outlet pipe;

4. a cell stack;

5. A battery box.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless specifically defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Referring to fig. 1-3, an embodiment of the present utility model provides a heat exchange device, which includes a heat exchange plate body 1;

The heat exchange plate body 1 comprises a first heat exchange cavity 11, the first heat exchange cavity 11 is formed by opposite arrangement of a first heat exchange plate 101 and a second heat exchange plate 102, and the first heat exchange cavity 11 is divided into a plurality of first heat exchange channels 111 by a plurality of first partition plates 110; at least one of the first partition plates 110 is provided with the first exhaust passage 141 in the thickness direction of the heat exchange plate body 1.

In this embodiment, at least one first partition 110 divides the first heat exchange cavity 11 into a plurality of first heat exchange channels 111, so that the heat exchange medium can spread over the first heat exchange cavity 11, and the heat can be transferred more uniformly by the smaller temperature difference of the heat exchange medium in the first heat exchange cavity 11; at least one first partition plate 110 is provided with a first exhaust channel 141 along the thickness direction of the heat exchange plate body 1, the first exhaust channel 141 is used for exhausting combustible gas or toxic gas released by the battery cell stacking body 4 at one side of the heat exchange device, and the first exhaust channel 141 is arranged on the first partition plate 110 and can be tightly attached to the battery cell stacking body 4, and is mutually independent of the first heat exchange channel 111 without mutual influence, so that the space of the heat exchange device is utilized to the greatest extent, and the energy density reduction of the battery module is avoided.

In the above embodiment, since the height of the heat exchanging device is consistent with the height of the cell stack 4, the number of the first heat exchanging channels 111 and the second heat exchanging channels 121 may be set according to the height of the cell stack 4, and the higher the height of the cell stack 4, the more the first heat exchanging channels 111 and the first air exhausting channels 141 are provided, which is more advantageous for rapid heat exchange.

In an embodiment, the heat exchange plate body 1 further includes a second heat exchange cavity 12 stacked with the first heat exchange cavity 11, where the second heat exchange cavity 12 is formed by disposing a third heat exchange plate 103 and a fourth heat exchange plate 104 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 partition plates 120; the second partition plate 120 is provided with the second exhaust passage 142 in the thickness direction of the heat exchange plate body 1; a third exhaust passage 143 is arranged between the second heat exchange plate and the third heat exchange plate; the first exhaust passage 141, the second exhaust passage 142 and the third exhaust passage 143 communicate.

In this embodiment, the first partition plate 110 and the second partition plate 120 divide 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, respectively, so that the heat exchange medium can spread over the first heat exchange chamber 11 and the second heat exchange chamber 12, and the heat can be transferred more uniformly by the smaller temperature difference of the heat exchange medium in the first heat exchange chamber 11 and the second heat exchange chamber 12.

In the above embodiment, at least one of the second partition plates 120 is provided with the second exhaust passage 142 in the thickness direction of the heat exchange plate body 1; the third exhaust passage 143 is located between the second heat exchanger plate 102 and the third heat exchanger plate 103; the first and second exhaust passages 141 and 142 communicate with the third exhaust passage 143; that is, the first heat exchange plate 101 and the second heat exchange plate 102 are provided with a plurality of first exhaust passages 141 penetrating the first partition plate 110 along the length direction of the first partition plate 110, and the third heat exchange plate 103 and the fourth heat exchange plate 104 are provided with a plurality of second exhaust passages 142 penetrating the second partition plate along the length direction of the second partition plate 120, since the first exhaust passages 141 penetrate the first partition plate 110; the second exhaust channel 142 penetrates through the second partition 120, two sides of the heat exchange device can be communicated with the third exhaust channel 143, when thermal runaway occurs, combustible gas or toxic gas released by the cell stack 4 at 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 is rapidly discharged from two ends of the third exhaust channel 143, so that potential safety hazards such as explosion and fire are avoided, and the number of the first exhaust channel 141, the second exhaust channel 142 and the third exhaust channel 143 can be set by themselves.

It will be appreciated that the positions of the first and second partitions 110 and 142 are not limited, and the positions of the first and second exhaust passages 141 and 142 are not limited, and the first and second partitions 110 and 142 may be disposed on the same horizontal line, and the first and second exhaust passages 141 and 142 may be disposed opposite to each other, so that the exhaust efficiency is the highest.

In the above embodiment, a heating cavity 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 cavity 13.

In the above embodiment, the heating cavity 13 is disposed between the first heat exchange cavity 11 and the second heat exchange cavity 12 which are stacked, and the heating component in the heating cavity 13 can directly exchange heat with the heat exchange media in the first heat exchange cavity 11 and the second heat exchange cavity 12 on both sides, and the circulating heat exchange media continuously conduct heat to the battery system.

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

When the electric core stacking body 4 needs to be cooled, the heating component stops supplying power, when the cooling medium is a refrigerant, the refrigerant flowing in the first heat exchange cavity 11 and the second heat exchange cavity 12 absorbs heat of the electric core stacking body 4 and then continuously evaporates, and finally becomes gas to return to the compressor through the expansion valve to complete the whole cycle; when the cooling medium is water or other cooling liquid, the water or other cooling liquid continuously flows into the first heat exchange cavity 11 and the second heat exchange cavity 12, and flows out after absorbing heat, so that the heat is taken away, and the circulation is completed.

In the above embodiment, the heat exchanging apparatus further includes a third partition 130, and the third partition 130 partitions the heating chamber 13 into a plurality of heating subchambers 131 and a plurality of third exhaust passages 143. Each heating subchamber 131 is internally provided with a heating component, and the heating component is separated from the third exhaust passage 143 by the third partition 130, so that the heating effect and the exhaust function of the heat exchange device are not interfered with each other.

In the above embodiment, the third exhaust passage 143 is spaced apart from the heating subchamber 131. The heating components are placed in the heating subchamber 131, and the third exhaust channels 143 and the heating subchamber 131 are distributed more uniformly at intervals, so that the exhaust effect and the heating effect of the heat exchange device are optimal.

In the above embodiment, the heat exchange device further includes a first plug 21 and a second plug 22, where the first plug 21 plugs at two ends of the first heat exchange cavity 11, and the first plug 21 plugs at two ends of the second heat exchange cavity 12. The first plugs 21 are plugged in the first heat exchange cavity 11, and the first plugs 21 are plugged in the two ends of the second heat exchange cavity 12 to prevent leakage of heat exchange medium and enhance heat exchange effect.

In the above embodiment, the heat exchange device further 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, where a first flow passage is respectively reserved between two ends of the first partition 110 and the first plug 21; a second flow passage is respectively reserved between the two ends of the second partition board 120 and the second plug 22; the first water inlet pipe 31 and the first water outlet pipe 32 are respectively arranged at one side of the first heat exchange plate 101 away from the heating cavity 13 and are provided with opposite ends of a first flow passage; the second water inlet pipe 33 and the second water outlet pipe 34 are respectively disposed at two opposite ends of the fourth heat exchange plate 104 away from the heating chamber 13 and having a second flow passage.

The heat exchange medium between the plurality of first heat exchange channels 111 of the first heat exchange chamber 11 flows through the first through-flow channels, and the heat exchange medium between the plurality of second heat exchange channels 121 of the second heat exchange chamber 12 flows through the second through-flow channels; the first water inlet pipe 31 and the first water outlet pipe 32 are respectively arranged at one side of the first heat exchange plate far away from the heating cavity 13 and provided with opposite ends of a first through-flow channel, so that heat exchange media can be conveniently introduced, the heat exchange media are introduced from the first water inlet pipe 31 and flow through the first heat exchange cavity 11, then flow out from the first water outlet pipe 32 at the other end through the first through-flow channel, and the heat exchange media in the plurality of first heat exchange channels 111 can be controlled to enter and exit only by one first water outlet pipe 32 and one first water inlet pipe 31, so that the effect of uniform heat exchange is realized and the cost is saved; the second water inlet pipe 33 and the second water outlet pipe 34 are similar. In another embodiment, two ends of the first partition 110 are attached to the first plug 21, and two ends of the second partition 120 are attached to the second plug 22, that is, each of the first heat exchange channel 111 and the second heat exchange channel 121 are independent and not mutually communicated, only the water inlet pipe and the water outlet pipe are required to be respectively arranged, and the heat exchange efficiency is higher.

In an embodiment, the heat exchange device further comprises an upper end plate 151 and a lower end plate 150, wherein the upper end plate 151 is connected to 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; the lower end plate 152 is connected to the other sides 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 whole heat exchange device more stable.

In the above embodiment, the heat exchange plate body 1, the first separator 110, the second separator 120, the third separator 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 partition plate 110, the second partition plate 120, the upper end plate 151 and the lower end plate 152 are integrally formed by extrusion molding of aluminum profile plates, the heat exchange plate body 1 made of aluminum has good heat conducting performance, the extrusion molding process is mature, various complicated shapes can be processed by extrusion molding, the production efficiency is high, the processing is convenient, and the cost is low.

Referring to fig. 4-5, another aspect of the present utility model provides a battery system, which includes the heat exchange device described in any of the foregoing embodiments, and further includes a battery cell stack 4 and a battery case 5, wherein a plurality of the battery cell stacks 4 are installed inside the battery case 5 through tab connection, and the heat exchange device is disposed on one side of the battery cell stack 4 parallel to the tab connection direction. The heat exchange device is arranged on one side of the battery cell stacking body 4 and can not only play a role of heat exchange, but also serve as a longitudinal beam or a transverse beam of the battery box body 5, so that the strength and the mode of the battery system are improved, the space is saved, and the cost is reduced.

In the above embodiment, the first heat exchange channel 111 and the second heat exchange channel 121 are internally flowed with a refrigerant or a heat exchange liquid, and the refrigerant or the heat exchange liquid can take away heat at normal temperature to achieve the effect of cooling the cell stack 4, and when the cell stack 4 needs to be heated in a cold environment, the heating component heats up, so that the refrigerant or the heat exchange liquid heats up, and transfers heat to the cell stack 4 to heat up.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes using the descriptions and drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the utility model.

Claims (11)

1. The heat exchange device is characterized by comprising a heat exchange plate body;

The heat exchange plate body comprises a first heat exchange cavity, the first heat exchange cavity is formed by arranging a first heat exchange plate and a second heat exchange plate oppositely, and the first heat exchange cavity is divided into a plurality of first heat exchange channels by a plurality of first partition plates; at least one first partition plate is provided with a first exhaust passage along the thickness direction of the heat exchange plate body.

2. The heat exchange device of claim 1, wherein the heat exchange plate body further comprises a second heat exchange chamber disposed in lamination with the first heat exchange chamber, the second heat exchange chamber being formed by a third heat exchange plate and a fourth heat exchange plate disposed opposite each other;

the second heat exchange cavity is divided into a plurality of second heat exchange channels by a plurality of second partition plates;

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

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

3. The heat exchange device of claim 2 further comprising a heating assembly, wherein a heating cavity is provided between the second heat exchange plate and the third heat exchange plate, and wherein the heating assembly is mounted within the heating cavity.

4. A heat exchange device according to claim 3 further comprising a third partition dividing the heating chamber into a plurality of heating subchambers and a plurality of the third exhaust passages.

5. The heat exchange device of claim 4 wherein the third exhaust passage is spaced from the heating subchamber.

6. The heat exchange device of claim 4 further comprising a first plug and a second plug, the first plug being plugged at both ends of the first heat exchange chamber and the first plug being plugged at both ends of the second heat exchange chamber.

7. The heat exchange device of claim 6, further comprising 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 passage is respectively reserved between two ends of the first partition plate and the first plug; a second overflow channel is reserved between the two ends of the second partition board and the second plug respectively; the first water inlet pipe and the first water outlet pipe are respectively arranged at one side of the first heat exchange plate far away from the heating cavity, and opposite ends of a first flow passage are reserved; the second water inlet pipe and the second water outlet pipe are respectively arranged at one side of the fourth heat exchange plate far away from the heating cavity and are provided with opposite ends of a second overflow channel.

8. The heat exchange device of claim 4 further comprising an upper end plate and a lower end plate, the upper end plate connecting one side of the first, second, third and fourth heat exchange plates; the lower end plate is connected with the other sides 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 of claim 8 wherein the heat exchange plate body, the first separator plate, the second separator plate, the third separator plate, the upper end plate, and the lower end plate are integrally formed by an extrusion process.

10. A battery system, characterized by comprising the heat exchange device according to any one of claims 1 to 9, further comprising a battery cell stack and a battery box, wherein a plurality of battery cell stacks are installed in the battery box through tab connection, and the heat exchange device is arranged on one side of the battery cell stack in parallel to the tab connection direction.

11. The battery system according to claim 10, wherein a refrigerant or a heat exchange liquid flows through the first heat exchange passage and the second heat exchange passage.