Heat exchange structure and battery

Abstract

The utility model relates to a heat exchange structure and a battery. The heat exchange structure comprises a heat exchange body, a heat exchange cavity is formed in the heat exchange body, and a liquid inlet and a liquid outlet are formed in the heat exchange body; the heating unit is located in the heat exchange cavity and is in insulation connection with the heat exchange main body, and the heating unit and the inner wall of the heat exchange main body define a flow channel for heat exchange fluid to flow; and the liquid inlet and the liquid outlet are both communicated with the flow channel. The heat exchange structure and the battery provided by the utility model are high in heating efficiency, uniform in heating, small in heat loss and high in energy utilization rate.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a heat exchange structure and a battery. Background Art

[0002] With the rapid development of the new energy industry, the application field of batteries is also expanding. However, due to the inherent characteristics of the battery, such as low discharge rate at low temperatures, the performance of the battery in winter has always been poor. In order to increase the scope of use of the battery, many manufacturers have added a heating system to the battery to increase the temperature of the battery itself through heating. However, the traditional heating system has a series of problems such as low heating efficiency, high heating energy consumption, and uneven heating. Therefore, how to solve the above problems is a difficulty faced by industry technicians. Utility Model Content

[0003] Based on this, it is necessary to provide a new heat exchange structure and battery to address the above problems.

[0004] A heat exchange structure, comprising:

[0005] A heat exchange body having a heat exchange cavity therein, and a liquid inlet and a liquid outlet are provided on the heat exchange body;

[0006] A heating unit is located in the heat exchange cavity and is insulated from the heat exchange body, wherein the heating unit and the inner wall of the heat exchange body are enclosed to form a flow channel for the heat exchange fluid to flow;

[0007] Wherein, the liquid inlet and the liquid outlet are both communicated with the flow channel.

[0008] In some embodiments, there are two of the flow channel, the liquid inlet and the liquid outlet, the two flow channels are respectively an inner flow channel and an outer flow channel, the outer flow channel is arranged around the periphery of the inner flow channel and is independent of the inner flow channel, the two liquid inlets are respectively an inner liquid inlet and an outer liquid inlet, the two liquid outlets are respectively an inner liquid outlet and an outer liquid outlet, the inner liquid inlet and the inner liquid outlet are both connected to the inner flow channel, and the outer liquid inlet and the outer liquid outlet are both connected to the outer flow channel.

[0009] In some embodiments, the inner flow channel is a circuitous one-way flow channel, the inner liquid inlet is connected to the starting position of the inner flow channel, and the inner liquid outlet is connected to the ending position of the inner flow channel; and / or

[0010] The outer flow channel is a circulation channel, and has a first position and a second position for equally dividing the circulation channel into two sub-flow channels. The outer liquid inlet is connected to the first position, and the outer liquid outlet is connected to the second position.

[0011] In some embodiments, the heating unit includes a plurality of heating elements and a plurality of insulating connecting elements, the heating elements and the insulating connecting elements are alternately arranged and connected end to end to form a closed-loop structure, and the inner side surfaces of all the heating elements and all the insulating connecting elements and the inner wall of the heat exchange body together define the inner flow channel, and the outer side surfaces of all the heating elements and all the insulating connecting elements and the inner wall of the heat exchange body together define the outer flow channel.

[0012] In some of the embodiments, the heat exchange structure further includes an insulating heat-conducting unit, which includes a plurality of insulating heat-conducting parts, each of which corresponds to the heating parts one by one, and each of which is wrapped around the corresponding heating parts.

[0013] In some embodiments, the insulating heat conductive member is a ceramic bushing.

[0014] In some embodiments, a limiting unit is further included, wherein the heat exchange body has a heat exchange surface that contacts and exchanges heat with the battery module, and the limiting unit is arranged on the heat exchange surface and includes a plurality of limiting parts, and all of the limiting parts together surround a limiting area to form a limiting battery module.

[0015] In some embodiments, the heat exchange body includes two plates arranged opposite to each other, and the two plates are detachably connected to define the heat exchange chamber.

[0016] A battery comprising:

[0017] A box body, comprising the heat exchange structure as described in any one of the above embodiments, wherein the heat exchange structure is configured to form at least one of a bottom plate, a side plate or a top plate of the box body; and

[0018] A battery module is disposed in the box and in contact with the heat exchange body.

[0019] In some embodiments, the battery also includes a mounting frame, the mounting frame is in contact with the heat exchange body, the mounting frame has an mounting space, the battery module is located in the mounting space, and the mounting frame limits the battery module in at least one direction of the length, width and height of the battery module.

[0020] In the above heat exchange structure and battery, the heating unit is arranged in the heat exchange cavity of the heat exchange body, and is enclosed with the inner wall of the heat exchange fluid to form a flow channel for the heat exchange fluid to flow. When the heating unit is working, a small part of the heat generated by the heating unit is directly transferred to the battery module through the heat exchange body, and most of the heat generated by the heating body is absorbed by the heat exchange fluid and indirectly transferred to the battery module through the heat exchange fluid. This heat conduction method has a small heat loss and high heating efficiency. In addition, since most of the heat generated by the heating unit is absorbed by the heat exchange fluid and indirectly transferred to the battery module through the heat exchange body, the heat transfer is more uniform through the heat exchange fluid, which is conducive to uniform heating. The battery module is not prone to accidents such as short circuit and dry burning, and the risk of thermal runaway is also reduced. In addition, since the heating unit is directly arranged in the heat exchange cavity and is defined with the inner wall of the heat exchange body to form a flow channel, the heat exchange fluid conducts and transfers heat at the same time when flowing through the flow channel. In this way, there is almost no heat loss and the energy utilization rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the battery module and the heat exchange structure in one embodiment of the present application;

[0022] Figure 2 for Figure 1 An exploded view of the heat exchange structure shown;

[0023] Figure 3 for Figure 2 An enlarged schematic diagram of a local structure A in the heat exchange structure shown;

[0024] Figure 4 for Figure 2 The schematic diagram of the heat exchange structure shown is a schematic diagram of the structure after removing the upper bottom plate;

[0025] Figure 5 for Figure 4 An enlarged schematic diagram of local structure B in the heat exchange structure shown.

[0026] Figure Number:

[0027] 1.Battery;

[0028] 10. Heat exchange structure; 20. Battery module; 30. Installation frame;

[0029] 11. heat exchange body; 111. plate; 111a. upper bottom plate; 111b. lower bottom plate; 112. heat exchange chamber; 113. inner liquid inlet; 114. outer liquid inlet; 115. inner liquid outlet; 116. outer liquid outlet; 12. heating unit; 121. heating element; 122. insulating connector; 13. inner flow channel; 14. outer flow channel; 15. insulating heat conducting unit; 151. insulating heat conducting element; 16. limiting unit; 161. limiting element; 162. limiting area; 17. terminal;

[0030] 21. Battery cells;

[0031] 31. Installation space; 32. End plate; 33. Side pressure plate; 34. Top pressure plate;

[0032] X, length direction of the battery module; Y, width direction of the battery module; Z, height direction of the battery module. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, 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", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 or an electrical connection; it can be 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0039] See also Figure 1 At present, from the perspective of market development, the application of battery 1 is becoming more and more extensive. Battery 1 is not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of battery 1, its market demand is also constantly expanding.

[0040] Due to the inherent characteristics of the battery 1, such as low discharge rate at low temperatures, the performance of the battery 1 in winter has always been poor. In order to increase the use range of the battery 1, many manufacturers have added a heating system to the battery 1 to increase the temperature of the battery 1 itself by heating.

[0041] At present, there are three mainstream heating methods for heating systems. The first is air heating, which heats the air through the heating system and blows hot air to the battery module 20 of the battery 1, so that the temperature of the battery module 20 rises. This method is relatively low in cost, but the heating efficiency is relatively low; the second is resistance heating, in which a resistance heating sheet is attached around the battery module 20. This method has a fast heating speed, but the heating is uneven, and it is also prone to accidents such as short circuit and dry burning, resulting in thermal runaway of the battery 1; the third is liquid heating, in which a flow channel is designed in the bottom plate of the battery 1 box, and the heat exchange fluid heated centrally inside the thermal management unit of the battery 1 is pressed into the flow channel, and then through heat transfer, the heat exchange fluid in the flow channel transfers the heat to the battery module 20 through the bottom plate, so that the temperature of the battery module 20 rises. This method heats more evenly, but there will be heat loss in the process of pressing the heated heat exchange fluid into the flow channel, resulting in energy loss and waste.

[0042] Please refer again Figure 1 , and also see Figures 2 to 5 In order to alleviate the above problems, the present application provides a heat exchange structure 10, which is used to directly contact the battery module 20 in the battery 1 and can exchange heat to increase or decrease the temperature of the battery module 20. The heat exchange structure 10 includes a heat exchange body 11 and a heating unit 12. The heat exchange body 11 has a heat exchange cavity 112, and the heat exchange body 11 is provided with a liquid inlet and a liquid outlet. The heating unit 12 is located in the heat exchange cavity 112 and is insulated from the heat exchange body 11. The heating unit 12 and the inner wall of the heat exchange body 11 enclose a flow channel for the flow of heat exchange fluid, and the liquid inlet and the liquid outlet are both connected to the flow channel.

[0043] The heat exchange body 11 is made of a material with good thermal conductivity, so that heat can be transferred between the heat exchange fluid and the battery module 20 through the heat exchange body 11 .

[0044] Specifically, the heat exchange body 11 is a plate-like structure having a larger and relatively flat surface, so as to increase the contact area between the heat exchange body 11 and the battery module 20 and realize rapid heat exchange.

[0045] The heat exchange fluid is a fluid with better thermal conductivity, such as water, alcohol or other fluid forms.

[0046] The heating unit 12 is an electric heating structure, and can heat the heat exchange fluid when the heating unit 12 is powered on. The heating unit 12 is insulated from the heat exchange body 11, so when the heating unit 12 is powered on, the current on it will not reach the heat exchange body 11, thereby avoiding leakage.

[0047] The heating unit 12 and the inner wall of the heat exchange body 11 are enclosed to form a flow channel for the flow of the heat exchange fluid, and the liquid inlet and the liquid outlet are both connected to the flow channel. Therefore, the heat exchange flow channel can circulate between the inside and outside of the heat exchange chamber 112 through the liquid inlet and the liquid outlet, thereby realizing heat exchange between the battery module 20 and the heat exchange fluid.

[0048] When the heating unit 12 is not working, the temperature of the heat exchange fluid in the flow channel is lower than the temperature of the working battery module 20. At this time, the heat exchange fluid can be used as a cooling fluid and used to absorb the heat generated by the working battery module 20 to achieve the cooling of the battery module 20, thereby ultimately achieving the purpose of reducing the risk of thermal runaway of the battery 1. When the heating unit 12 is working, the heat exchange fluid in the flow channel absorbs the heat of the heating unit 12 and the temperature rises. When the temperature of the heat exchange fluid is higher than that of the battery module 20, the heat exchange fluid transfers the heat to the battery module 20 to increase the temperature of the battery module 20, thereby ultimately achieving the purpose of reducing the risk of the battery 1 not being able to work normally due to the discharge rate at low temperatures.

[0049] In the present application, the heating unit 12 is arranged in the heat exchange cavity 112 of the heat exchange body 11, and is enclosed with the inner wall of the heat exchange fluid to form a flow channel for the heat exchange fluid to flow. When the heating unit 12 is working, a small part of the heat generated by the heating unit 12 is directly transferred to the battery module 20 through the heat exchange body 11, and most of the heat generated by the heating body is absorbed by the heat exchange fluid and indirectly transferred to the battery module 20 through the heat exchange fluid. This heat conduction method has a small heat loss and a high heating efficiency. In addition, since most of the heat generated by the heating unit 12 is absorbed by the heat exchange fluid and indirectly transferred to the battery module 20 through the heat exchange body 11, the heat transfer is more uniform through the heat exchange fluid, which is conducive to achieving uniform heating. The battery module 20 is not prone to accidents such as short circuits and dry burning, and the risk of thermal runaway is also reduced. In addition, since the heating unit 12 is directly disposed in the heat exchange cavity 112 and defines a flow channel with the inner wall of the heat exchange body 11, the heat exchange fluid conducts and transfers heat simultaneously when flowing through the flow channel. In this way, there is almost no heat loss and the energy utilization rate is high.

[0050] Please also read Figures 2 to 5 In some embodiments, the flow channel may be one or more, which may be specifically arranged according to the requirements. In some optional embodiments, the flow channel, the liquid inlet and the liquid outlet are all two, the two flow channels are respectively an inner flow channel 13 and an outer flow channel 14, the outer flow channel 14 is arranged around the periphery of the inner flow channel 13 and is independent of the inner flow channel 13, the two liquid inlets are respectively an inner liquid inlet 113 and an outer liquid inlet 114, the two liquid outlets are respectively an inner liquid outlet 115 and an outer liquid outlet 116, the inner liquid inlet 113 and the outer liquid outlet 116 are both connected to the inner flow channel 13, and the outer liquid inlet 114 and the outer liquid outlet 116 are both connected to the outer flow channel 14.

[0051] Among them, on the surface of the heat exchange body 11 facing away from the battery module 20, the projected overlapping area between the inner flow channel 13 and the battery module 20 is larger, and the projected overlapping area between the outer flow channel 14 and the battery module 20 is smaller, so that the inner flow channel 13 forms the main flow channel for heat exchange with the battery module 20, and the outer flow channel 14 forms the auxiliary flow channel for heat exchange with the battery module 20.

[0052] According to the demand for cooling or heating, the number of connected channels can be controlled to improve energy utilization efficiency, such as connecting only one of the inner channel 13 and the outer channel 14, or connecting both the inner channel 13 and the outer channel 14. It can be understood that connecting a channel means introducing a heat exchange fluid that can circulate into the channel.

[0053] For example, when the inner flow channel 13 is connected, the heat exchange fluid flows in from the inner inlet 113 and flows out from the inner outlet 115. When the outer flow channel 14 is connected, the heat exchange fluid flows in from the outer inlet 114 and flows out from the outer outlet 116.

[0054] As an example, when the battery module 20 generates a lot of heat during operation, only the inner flow channel 13 may be connected, or both the inner flow channel 13 and the outer flow channel 14 may be connected. At this time, the heating unit 12 is not working, the temperature of the heat exchange fluid is lower than the temperature of the battery module 20, and the heat exchange fluid can absorb the heat of the battery module 20 to achieve cooling of the battery module 20. When the battery module 20 generates less heat during operation, only the outer flow channel 14 may be connected.

[0055] When the external environment temperature is low, such as in a low temperature environment in winter, the battery 1 may not work due to the low temperature. At this time, the inner flow channel 13 may be connected, or the inner flow channel 13 and the outer flow channel 14 may be connected at the same time. At this time, the heating unit 12 works, the heat exchange fluid absorbs the heat of the heating unit 12, and transfers the heat to the battery module 20 through the heat exchange body 11, and the battery module 20 is heated to adjust to the normal working temperature.

[0056] Of course, under some other working conditions, only the outer flow channel 14 can be connected and the heating unit 12 can be started. Under other working conditions, the inner flow channel 13 and the outer flow channel 14 can also be connected at the same time, and heat exchange fluids of different temperatures can be introduced into the inner flow channel 13 and the outer flow channel 14. For example, initially only the inner flow channel 13 is connected, and the heat exchange fluid in the inner flow channel 13 is used to cool the battery module 20. When the battery module 20 generates more heat during operation, resulting in a higher temperature of the battery module 20, and the inner flow channel 13 cannot meet the cooling requirements of the battery module 20, the outer flow channel 14 can be connected again, and a heat exchange channel with a lower temperature can be introduced into the outer flow channel 14. Through heat exchange, the heat exchange fluid in the outer flow channel 14 can absorb the temperature of the heat exchange fluid in the inner flow channel 13 to avoid thermal runaway of the battery 1. For example, in order to shorten the heating time and improve the heating efficiency, the heat exchange fluid heated by the external heating component can be introduced into the inner flow channel 13 and the outer flow channel 14 at the same time, and the heating unit 12 can be started at the same time to achieve a rapid increase in the temperature of the battery module 20.

[0057] It can be seen that by designing the inner flow channel 13 and the outer flow channel 14, the heat exchange structure 10 can meet the requirements under various working conditions, and the heat exchange structure 10 has wide applicability.

[0058] Further, in some optional embodiments, the inner flow channel 13 is a circuitous one-way flow channel, and the inner liquid inlet 113 is at a position close to the starting position of the inner flow channel 13 (such as Figure 4 The inner liquid outlet 115 is connected to the end position of the inner flow channel 13 (such as Figure 4 and / or, the outer flow channel 14 is a circulation channel, and the outer flow channel 14 has a first position (such as a first position) that divides the circulation channel into two sub-flow channels. Figure 4 The position indicated by the label E) and the second position (such as Figure 4 The outer liquid inlet 114 is connected to the first position, and the outer liquid outlet 116 is connected to the second position. For example, the inner flow channel 13 is a circuitously arranged one-way flow channel, and the outer flow channel 14 is a circulating flow channel.

[0059] For example, taking the heat exchange body 11 as a rectangular structure, the starting position and the ending position of the inner flow channel 13 are roughly along a diagonal line of the rectangle (such as Figure 3 The first position and the second position of the outer flow channel 14 are arranged substantially along another diagonal line of the rectangular structure (such as Figure 3 (as shown by the middle dotted line L2).

[0060] The inner flow channel 13 is a circuitously arranged one-way flow channel, and the inner liquid inlet 113 is connected to the starting position of the inner flow channel 13, and the inner liquid outlet 115 is connected to the ending position of the inner flow channel 13. Therefore, the residence time of the heat exchange fluid in the inner flow channel 13 is extended, so the heat exchange fluid has sufficient time to exchange heat with the battery module 20, thereby improving the heat exchange effect.

[0061] The outer flow channel 14 is a circulation channel, and the outer flow channel 14 is arranged around the outer periphery of the inner circulation, which can better assist the inner flow channel 13 in heat exchange. In addition, the outer flow channel 14 has a first position and a second position that divide the circulation channel into two sub-flow channels, the outer liquid inlet 114 is connected to the first position, and the outer liquid outlet 116 is connected to the second position, so the heat exchange fluid stays in the outer flow channel 14 for a longer time, so the outer flow channel 14 also has a better effect of assisting heat exchange.

[0062] like Figure 4 and Figure 5 As shown, in some optional embodiments, the heating unit 12 includes a plurality of heating elements 121 and a plurality of insulating connectors 122, the heating elements 121 and the insulating connectors 122 are alternately arranged and connected end to end to form a closed loop structure, and the inner side surfaces of all the heating elements 121 and all the insulating connectors 122 and the inner wall of the heat exchange body 11 together define an inner flow channel 13, and the outer side surfaces of all the heating elements 121 and all the insulating connectors 122 and the inner wall of the heat exchange body 11 together define an outer flow channel 14.

[0063] The insulating connector 122 is made of insulating material to avoid short circuit between two adjacent and connected heating elements 121. The heating elements 121 and the insulating connectors 122 are alternately arranged and connected end to end to form a closed loop structure, and the inner side surfaces of all the heating elements 121 and all the insulating connectors 122 and the inner wall of the heat exchange body 11 jointly define the inner flow channel 13, and the outer side surfaces of all the heating elements 121 and all the insulating connectors 122 and the inner wall of the heat exchange body 11 jointly define the outer flow channel 14, which can achieve the mutual independence between the inner flow channel 13 and the outer flow channel 14, so as to avoid the heat exchange fluids in the inner flow channel 13 and the outer flow channel 14 from interfering with each other, thereby improving the heat exchange effect.

[0064] In order to improve the space utilization, two heating elements 121 and two insulating connectors 122 can be provided, and the length of the heating element 121 is much greater than the length of the insulating connector 122. In addition, in order to ensure that the heating element 121 can be electrically connected to the external power supply, a terminal 17 is also provided on the heat exchange body 11, and the heating element 121 is electrically connected to the external power supply through the terminal 17.

[0065] Furthermore, in some optional embodiments, the heat exchange structure 10 also includes an insulating heat conductive unit 15, which includes a plurality of insulating heat conductive parts 151, and the insulating heat conductive parts 151 correspond to the heating parts 121 one by one, and the insulating heat conductive parts 151 are wrapped around the corresponding heating parts 121.

[0066] When the heating element 121 is powered on, the heating element 121 starts to heat up and transfers the heat to the insulating heat-conducting element 151 , and then the insulating heat-conducting element 151 heats the heat exchange fluid in the flow channel, and finally transfers the heat to the battery module 20 through the heat exchange fluid.

[0067] Since the insulating heat conductive member 151 is designed outside the heating member 121, the heating member 121 does not directly contact the heat exchange fluid, which can greatly reduce the risk of the heat exchange fluid being charged, thereby improving the safety performance of the entire battery 1. In addition, the design of the insulating heat conductive member 151 can also improve the overall strength of the heat exchange structure 10, and the heat exchange structure 10 is not easily deformed.

[0068] Specifically, the insulating heat-conducting member 151 can be a ceramic bushing, a glass bushing, etc. Taking the insulating heat-conducting member 151 as a ceramic bushing as an example, the ceramic bushing has better insulation and thermal conductivity, so that it can achieve rapid heat conduction and reduce the risk of leakage. In addition, the ceramic bushing also has excellent pressure resistance and can further improve the strength of the heat exchange structure 10.

[0069] like Figure 1 , Figure 2 and Figure 3 As shown, in some optional embodiments, the heat exchange structure 10 also includes a limiting unit 16, the heat exchange body 11 has a heat exchange surface that contacts and exchanges heat with the battery module 20, the limiting unit 16 is arranged on the heat exchange surface, and includes a plurality of limiting members 161, all of the limiting members 161 together surround a limiting area 162 that forms a limiting battery module 20.

[0070] Specifically, the stopper 161 can be in the shape of a letter "I", a letter "Seven", etc. The specific structure of the stopper 161 is not limited here. For example, the heat exchange body 11 and the battery module 20 are both rectangular structures, and the stopper 161 is in the shape of a letter "Seven". The stopper 161 has a right angle, and the battery module 20 has a heat exchange surface that contacts and fits with the heat exchange body 11. The heat exchange surface can be one of the bottom surface, the side surface and the top surface of the battery module 20. The heat exchange surface has four corners, and the corners are right angles. There are four stoppers 161, which correspond to the four corners of the heat exchange surface one by one. The right angle of each stopper 161 fits with the corner of the heat exchange surface to achieve the limit.

[0071] By providing the limiting unit 16, the stability and reliability of the installation between the heat exchange structure 10 and the battery module 20 can be improved, thereby helping to maintain the tightness of the contact between the heat exchange structure 10 and the battery module 20. In this case, the heat exchange structure 10 and the battery module 20 can effectively exchange heat.

[0072] In some optional embodiments, the heat exchange body 11 includes two plates 111 arranged opposite to each other, and the two plates 111 are detachably connected to define a heat exchange cavity 112. The two plates 111 can be detachably connected by means of screws, pins, etc. By designing the two plates 111 to be detachably connected and define the heat exchange cavity 112, the heating unit 12 can be easily installed by disassembling the two plates 111.

[0073] like Figure 1 and Figure 2 As shown, the present application also provides a battery 1, which includes a box body and a battery module 20. The box body includes a heat exchange structure 10 as described in any one of the above embodiments. The heat exchange structure 10 is configured to form at least one of the bottom plate, side plate or top plate of the box body. The battery module 20 is arranged in the box body and contacts with the heat exchange body 11.

[0074] The battery module 20 includes a plurality of battery cells 21 , and the plurality of battery cells 21 may be connected in parallel, in series, or in a mixed manner to form the battery module 20 .

[0075] Specifically, when the heat exchange structure 10 is constructed to form the bottom plate of the box body, the heat exchange body 11 is located below the battery module 20 and contacts the bottom surface of the battery module 20. At this time, the bottom surface of the battery module 20 is the heat exchange surface of the battery module 20; when the heat exchange structure 10 is constructed to form the side plate of the box body, the heat exchange body 11 is located on one side of the battery module 20 and contacts the side surface of the battery module 20. At this time, the side surface of the battery module 20 is the heat exchange surface of the battery module 20; when the heat exchange structure 10 is constructed to form the top plate of the box body, the heat exchange body 11 is located above the battery module 20 and contacts the top surface of the battery module 20. At this time, the top surface of the battery module 20 is the heat exchange surface of the battery module 20.

[0076] Generally speaking, the heat exchange structure 10 is usually constructed to form the bottom plate of the box, so that the battery module 20 can be closely attached to the heat exchange body 11 under the action of its own gravity. For the convenience of explanation, the following embodiments are all described by taking the heat exchange structure 10 as an example to form the bottom plate of the box. In this embodiment, one of the two plates 111 connected to each other by the heat exchange body 11 is an upper bottom plate 111a, and the other is a lower bottom plate 111b. The upper bottom plate 111a is arranged toward the battery module 20, and the lower bottom plate 111b is arranged away from the battery module 20.

[0077] In this embodiment, the heat exchange structure 10 is constructed to form at least one of the bottom plate, side plate or top plate of the box body, and when the heat exchange structure 10 directly heats the battery module 20 disposed in the box body, it can reduce the loss of heat transfer and achieve a good heating effect.

[0078] In some optional embodiments, the battery 1 also includes a mounting frame 30, which is in contact with the heat exchange body 11, and has a mounting space 31. The battery module 20 is located in the mounting space 31, and the mounting frame 30 limits the battery module 20 in at least one direction of the length direction X, width direction Y and height direction of the battery module 20.

[0079] Taking the bottom plate of the box body formed by the heat exchange structure 10 as an example, the mounting frame 30 and the battery module 20 are both supported above the heat exchange structure 10 and are in direct contact with the heat exchange body 11 of the heat exchange structure 10 .

[0080] For example, the mounting frame 30 may include two end plates 32 spaced apart along the length direction X of the battery module 20, two side pressure plates 33 spaced apart along the width direction Y of the battery module 20, and a top pressure plate 34 disposed above the battery module 20 along the height direction Z of the battery module 20, the two end plates 32, the two side pressure plates 33 and the top pressure plate 34 are all in contact with the battery module 20, and the two side pressure plates 33 and the top pressure plate 34 are all connected to the two end plates 32 to define the mounting space 31. This type of mounting frame 30 can limit the battery module 20 in the length direction X, the width direction Y and the height direction Z of the battery module 20.

[0081] In this embodiment, by providing the mounting frame 30 , the mounting frame 30 can reduce the risk of the battery module 20 jumping in at least one direction of its length direction X, width direction Y and height direction Z, thereby ensuring the stability and reliability of the installation of the battery module 20 .

[0082] The above-mentioned heat exchange structure 10 and battery 1, the heating unit 12 is arranged in the heat exchange cavity 112 of the heat exchange body 11, and is enclosed with the inner wall of the heat exchange fluid to form a flow channel for the heat exchange fluid to flow. When the heating unit 12 is working, a small part of the heat generated by the heating unit 12 is directly transferred to the battery module 20 through the heat exchange body 11, and most of the heat generated by the heating body is absorbed by the heat exchange fluid and indirectly transferred to the battery module 20 through the heat exchange fluid. This heat conduction method has a small heat loss and high heating efficiency. In addition, since most of the heat generated by the heating unit 12 is absorbed by the heat exchange fluid and indirectly transferred to the battery module 20 through the heat exchange body 11, the heat transfer is more uniform through the heat exchange fluid, which is conducive to achieving uniform heating. The battery module 20 is not prone to accidents such as short circuit and dry burning, and the risk of thermal runaway is also reduced. In addition, since the heating unit 12 is directly disposed in the heat exchange cavity 112 and defines a flow channel with the inner wall of the heat exchange body 11, the heat exchange fluid conducts and transfers heat simultaneously when flowing through the flow channel. In this way, there is almost no heat loss and the energy utilization rate is high.

[0083] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A heat exchange structure, characterized in that: The heat exchange structure comprises: A heat exchange body (11) having a heat exchange cavity (112) therein, and a liquid inlet and a liquid outlet are provided on the heat exchange body (11); A heating unit (12) is located in the heat exchange cavity (112) and is insulated from the heat exchange body (11); the heating unit (12) and the inner wall of the heat exchange body (11) are enclosed to form a flow channel for the heat exchange fluid to flow; Wherein, the liquid inlet and the liquid outlet are both communicated with the flow channel.

2. The heat exchange structure according to claim 1, characterized in that: The flow channel, the liquid inlet and the liquid outlet are each two in number. The two flow channels are respectively an inner flow channel (13) and an outer flow channel (14). The outer flow channel (14) is arranged around the periphery of the inner flow channel (13) and is independent of the inner flow channel (13). The two liquid inlets are respectively an inner liquid inlet (113) and an outer liquid inlet (114). The two liquid outlets are respectively an inner liquid outlet (115) and an outer liquid outlet (116). The inner liquid inlet (113) and the inner liquid outlet (115) are both in communication with the inner flow channel (13), and the outer liquid inlet (114) and the outer liquid outlet (116) are both in communication with the outer flow channel (14).

3. The heat exchange structure according to claim 2, characterized in that: The inner flow channel (13) is a circuitously arranged one-way flow channel, the inner liquid inlet (113) is connected to the starting position of the inner flow channel (13), and the inner liquid outlet (115) is connected to the ending position of the inner flow channel (13); and / or The outer flow channel (14) is a circulation channel, and the outer flow channel (14) has a first position and a second position for equally dividing the circulation channel into two sub-flow channels, the outer liquid inlet (114) is connected to the first position, and the outer liquid outlet (116) is connected to the second position.

4. The heat exchange structure according to claim 2 or 3, characterized in that: The heating unit (12) comprises a plurality of heating elements (121) and a plurality of insulating connecting elements (122), wherein the heating elements (121) and the insulating connecting elements (122) are alternately arranged and connected end to end to form a closed loop structure, and the inner side surfaces of all the heating elements (121) and all the insulating connecting elements (122) and the inner wall of the heat exchange body (11) jointly define the inner flow channel (13), and the outer side surfaces of all the heating elements (121) and all the insulating connecting elements (122) and the inner wall of the heat exchange body (11) jointly define the outer flow channel (14).

5. The heat exchange structure according to claim 4, characterized in that: The heat exchange structure further comprises an insulating heat conducting unit (15), wherein the insulating heat conducting unit (15) comprises a plurality of insulating heat conducting parts (151), wherein the insulating heat conducting parts (151) correspond one to one to the heating parts (121), and wherein the insulating heat conducting parts (151) are wrapped around the corresponding heating parts (121).

6. The heat exchange structure according to claim 5, characterized in that: The insulating heat-conducting member (151) is a ceramic bushing.

7. The heat exchange structure according to claim 1, characterized in that: The heat exchange body (11) further comprises a limiting unit (16), wherein the heat exchange body (11) has a heat exchange surface that contacts and exchanges heat with the battery module (20), and the limiting unit (16) is arranged on the heat exchange surface and comprises a plurality of limiting members (161), wherein all the limiting members (161) together surround a limiting region (162) that limits the battery module (20).

8. The heat exchange structure according to claim 1, characterized in that: The heat exchange body (11) comprises two plates (111) arranged opposite to each other, and the two plates (111) are detachably connected to define the heat exchange chamber (112).

9. A battery, characterized in that: include: A box body, comprising the heat exchange structure according to any one of claims 1 to 8, wherein the heat exchange structure is configured to form at least one of a bottom plate, a side plate or a top plate of the box body; as well as A battery module (20), wherein the battery module (20) is disposed in the box and in contact with the heat exchange body (11).

10. The battery according to claim 9, characterized in that The battery further comprises a mounting frame (30), wherein the mounting frame (30) is in contact with the heat exchange body (11), the mounting frame (30) has a mounting space (31), the battery module (20) is located in the mounting space (31), and the mounting frame (30) limits the battery module (20) in at least one direction of the length direction (X), the width direction (Y) and the height direction (Z) of the battery module (20).

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