Temperature equalizing device of battery, battery and electric equipment

Abstract

The utility model discloses a temperature equalizing device of a battery, the battery and electric equipment, and generally relates to the technical field of batteries. The device comprises a vapor chamber; and the plurality of uniform-temperature extension pieces are connected to one side of the uniform-temperature plate and are arranged at intervals, and the plurality of uniform-temperature extension pieces are suitable for being respectively arranged between adjacent battery cells in the battery. The heat dissipation efficiency of the battery can be greatly improved, so that the safety of the battery is improved.

Description

Technical Field

[0001] The present disclosure generally relates to the field of battery technology, and in particular to a battery temperature equalizing device, a battery, and an electrical device. Background Art

[0002] With the development of electronic technology, related battery technology is also constantly developing, and charging and discharging batteries, especially fast charging batteries, are becoming more and more mainstream.

[0003] The charging and discharging process of rechargeable batteries is often completed through chemical reactions. During the chemical reaction, heat will be rapidly generated inside the battery, which will then cause the temperature of the entire rechargeable battery to rise. If the battery is at too high a temperature for a long time, the performance of the battery will eventually decline. In related technologies, in order to improve the problem of battery performance degradation caused by excessive temperature, a liquid cooling plate is added around the battery cell to help quickly dissipate heat inside the battery.

[0004] However, in the above-mentioned solution of adding a liquid cooling plate, the temperature difference between different areas of the battery cell close to the liquid cooling plate and far away from the liquid cooling plate is large, and the temperature equalization performance is low, which easily leads to low reliability of the battery. Utility Model Content

[0005] In view of the above-mentioned defects or deficiencies in the related art, it is desired to provide a battery temperature equalizing device, a battery and an electrical equipment, which can solve the problem of large temperature difference between different areas of the battery cell close to the liquid cooling plate and far away from the liquid cooling plate, low temperature equalizing performance, and easily lead to low reliability of the battery, greatly improve the battery heat dissipation and temperature equalizing efficiency, and thus improve the battery safety.

[0006] In a first aspect, a battery temperature equalization device is provided, the device comprising:

[0007] Temperature balancing plate;

[0008] A plurality of temperature-averaging extension pieces are connected to one side of the temperature-averaging plate and are arranged at intervals. The plurality of temperature-averaging extension pieces are suitable for being respectively arranged between adjacent battery cells in the battery.

[0009] In a possible embodiment, at least one heat conducting pipe is disposed on at least a portion of the temperature-averaging extension members, and the heat conducting pipe is disposed opposite to the battery core.

[0010] In a possible embodiment, the temperature-isolating extension member includes at least one mounting structure, and the mounting structure is suitable for mounting the heat pipe.

[0011] In a possible embodiment, the mounting structure includes a groove on the surface of the temperature-isolating extension piece opposite to the battery core, and the groove matches the shape of the heat pipe.

[0012] In a possible embodiment, the heat conduction tube is a sealed structure with a cavity, a heat conduction medium is arranged in the cavity of the heat conduction tube, and the heat conduction medium flows in the cavity of the heat conduction tube.

[0013] In a possible embodiment, after absorbing heat at the first end of the heat conduction tube, the heat conduction medium flows to the second end of the heat conduction tube, and after dissipating heat at the second end, it flows along the side wall of the heat conduction tube to the first end.

[0014] In a possible embodiment, the diameter of the heat conduction tube is smaller than a preset diameter.

[0015] In a possible embodiment, the shape of the heat conduction tube includes any one of the following: straight tube shape, bent tube shape.

[0016] In a possible embodiment, the material of the heat conduction tube is a metal heat conduction material.

[0017] In this application, the temperature equalizing device includes a heat pipe, and a plurality of temperature equalizing extension members connected to one side of the heat pipe and arranged at intervals. Among them, the plurality of temperature equalizing extension members are respectively adapted to be arranged between adjacent battery cells in the battery. In this way, since the temperature equalizing extension members can be extended and arranged in the middle of the battery cells, the heat of the battery cells can be conducted timely and quickly, and the heat of the battery cells with temperature difference can be balanced in time through the temperature equalizing extension members, thereby greatly improving the heat dissipation efficiency of the battery, and further improving the safety of the battery.

[0018] In a second aspect, a battery is provided. The battery includes a plurality of battery cells arranged side by side and the temperature equalizing device described in the first part. The heat pipe is arranged on the same side of the plurality of battery cells, and the plurality of temperature equalizing extension members are respectively arranged between adjacent battery cells.

[0019] In a possible embodiment, the battery further includes: a heat exchange plate, the heat exchange plate is opposite to the heat pipe and is arranged on the other side of the plurality of battery cells.

[0020] In a possible embodiment, the heat exchange plate includes at least one heat exchange area. The battery cells extend along a first direction, and lead terminals are arranged at both ends of the battery cells along the first direction. The plurality of battery cells are arranged in a second direction to form at least one battery cell module. The first direction intersects with the second direction. One heat exchange area corresponds to one battery cell module. The heat exchange area includes a plurality of flow channels for flowing a heat exchange medium;

[0021] The flow channels include a first flow channel, a second flow channel, and a third flow channel. The first flow channel and the third flow channel are respectively arranged at both ends of the battery cell along the first direction, and the second flow channel is arranged in the middle of the battery cell along the first direction;

[0022] One end of the first flow channel and one end of the third flow channel are both connected to the inlet of the heat exchange plate. The other end of the first flow channel and the other end of the third flow channel are both connected to the second flow channel, and the second flow channel is connected to the outlet of the heat exchange plate.

[0023] In a possible embodiment, the second flow channel includes two sub-flow channels. The other end of the first flow channel and the other end of the third flow channel are respectively connected to the two sub-flow channels, and the two sub-flow channels are both connected to the outlet.

[0024] In a possible embodiment, the flow channel further includes a first connecting flow channel. One end of the first connecting flow channel is connected to the inlet, and the other end of the first connecting flow channel is connected to the first flow channel and the third flow channel;

[0025] And / or, the flow channel further includes a second connecting flow channel. One end of the second connecting flow channel is connected to the outlet, and the other end of the second connecting flow channel is connected to the two sub-flow channels.

[0026] In a possible embodiment, the inlet and the outlet are provided on the same side of the heat exchange plate.

[0027] In a possible embodiment, there are multiple battery cell modules arranged along the first direction and / or the second direction, and there are multiple heat exchange regions provided corresponding to the multiple battery cell modules one by one.

[0028] In a possible embodiment, the multiple temperature equalizing extension pieces are respectively attached between the two opposite side surfaces of adjacent battery cells.

[0029] In a third aspect, an electrical device is provided. The electrical device includes the battery as described in the second aspect above.

[0030] Additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0031] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes, and advantages of the present application will become more obvious:

[0032] Figure 1 It is one of the structural schematic diagrams of the temperature equalizing device provided by the embodiment of the present application;

[0033] Figure 2 It is the second structural schematic diagram of the temperature equalizing device provided by the embodiment of the present application;

[0034] Figure 3The third structural schematic diagram of the temperature equalizing device provided by the embodiment of the present application;

[0035] Figure 4 The fourth structural schematic diagram of the temperature equalizing device provided by the embodiment of the present application;

[0036] Figure 5 The fifth structural schematic diagram of the temperature equalizing device provided by the embodiment of the present application;

[0037] Figure 6 The sixth structural schematic diagram of the temperature equalizing device provided by the embodiment of the present application;

[0038] Figure 7 The seventh structural schematic diagram of the temperature equalizing device provided by the embodiment of the present application.

[0039] Reference numerals:

[0040] Temperature equalizing device 30, heat pipe plate 31, temperature equalizing extension 32, battery 33, battery cell 331, battery cell module 332, heat conduction pipe 34, cavity 341, heat conduction pipe side wall 342, battery tray 35, first space 351, second space 352, heat exchange plate 70, heat exchange area 71, first flow channel 72, second flow channel 73, third flow channel 74, inlet of the heat exchange plate 75, outlet of the heat exchange plate 76, sub-flow channel 731 of the second flow channel, sub-flow channel 732 of the second flow channel. Detailed implementation manners

[0041] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than limiting the utility model. Additionally, it should be noted that for the sake of description, only the parts related to the utility model are shown in the accompanying drawings.

[0042] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The usage scenarios of the embodiments of the present application are described as follows.

[0043] With the development of electronic technology, related battery technologies are also constantly evolving, and rechargeable batteries, especially fast-charging batteries, are becoming more and more mainstream.

[0044] The charging and discharging process of rechargeable batteries is often completed through chemical reactions. During the chemical reaction, heat will be rapidly generated inside the battery, which will cause the temperature of the entire rechargeable battery to rise. If the battery is at too high a temperature for a long time, the performance of the battery will eventually decline. Especially during the fast charging process, a large amount of heat is rapidly generated inside the battery. The accumulation of heat will inevitably cause the battery temperature to rise, which will in turn cause the battery performance to decline, and may even cause leakage, gas release, smoking, etc. In severe cases, the battery will burn violently and explode, affecting the performance of the entire terminal.

[0045] In related technologies, in order to improve the problem of battery performance degradation caused by excessive temperature and improve the fast charging efficiency of the battery, a cold plate is installed near the battery to assist in cooling the battery. Specifically, the solution is as follows: the cold plate is installed on the side of the battery close to the battery cell module. The heat generated by the battery cell module can be quickly brought out of the battery system through the cold plate on this side.

[0046] However, in the above solution, a certain temperature difference will be generated in the height direction of the battery cell module, resulting in the heat generated by the battery cell module cannot be removed in time. This part of heat makes the internal temperature of the battery system higher than the ambient temperature, thereby causing problems such as reduced battery life and thermal safety.

[0047] Based on this, the present application proposes a battery temperature equalization device, a battery and an electrical equipment, which can solve the problem of large temperature difference between different areas of the battery cell close to the liquid cooling plate and far away from the liquid cooling plate, low temperature equalization performance, and easily lead to low battery reliability, greatly improve the battery heat dissipation and temperature equalization efficiency, and thus improve the battery safety.

[0048] Figure 1 Schematic diagram of the structure of a battery temperature equalization device 30 in one embodiment of the present application. Figure 1 The above device includes: a temperature equalizing plate 31 and a plurality of temperature equalizing extension members 32 .

[0049] In the embodiment of the present application, the plurality of temperature-averaging extension members 32 are connected to one side of the temperature-averaging plate 31 and are arranged at intervals. The plurality of temperature-averaging extension members 32 are suitable for being respectively arranged between adjacent battery cells 331 in the battery 33 .

[0050] For example, the battery 33 includes a plurality of battery modules 332, each of which includes a plurality of battery cells 331, and a certain gap exists between each battery cell 331. Figure 2 The battery module 332 includes two battery modules 332 on the left and right. Each battery module 332 includes a plurality of battery cells 331 , and there is a certain gap between adjacent battery cells 331 .

[0051] Exemplarily, the above-mentioned heat pipe 31 is disposed on one side close to the battery cell 331 in the battery 33, that is, Figure 2 in Figure 2 , the heat pipe 31 is disposed on one side that can be in direct contact with the battery cell module 332 in the battery 33.

[0052] In the embodiment of the present application, the above-mentioned plurality of heat pipe extensions 32 can be connected to the side of the heat pipe 31 close to the battery cell 331 and are spaced apart.

[0053] As Figure 2 shown, the above-mentioned plurality of heat pipe extensions 32 are vertically and fixedly disposed on the side of the above-mentioned heat pipe 31 close to the battery cell 331 in the battery 33. The above-mentioned heat pipe 31 passes through the above-mentioned plurality of heat pipe extensions 32 and is cross-arranged in the gaps between the above-mentioned several battery cells 331. The connection positions of the heat pipe extensions 32 on the heat pipe 31 correspond to the positions of the battery cells 331 in the battery 33 in a cross manner.

[0054] It can be understood that in the embodiment of the present application, the heat pipe 31 is a device for assisting in equalizing the temperature of the battery 33 and dissipating heat. Since there are certain gaps between the battery cells 331 in the battery 33, therefore, by arranging the plurality of heat pipe extensions 32 to be vertically and fixedly connected to the side of the heat pipe 31 close to the battery cell 331, and the heat pipe extensions 32 can be inserted into the gaps between the battery cells 331. In the case where the battery cells 331 generate heat and the heat generated by the battery cells 331 is uneven (for example, the temperature on the side of the battery cell 331 close to the heat pipe 31 is higher than the temperature on the side of the battery cell 331 far from the heat pipe 31), the heat pipe extensions 32 can equalize the temperature of the battery cells 331 and conduct the heat to the heat pipe 31. Then, while equalizing the temperature, the heat can also be dissipated through the heat pipe 31. As Figure 2 shown, in Figure 2 Figure 2 , a heat pipe extension 32 is provided between each adjacent battery cell 331.

[0055] Furthermore, a fixed connection relationship of integral molding can be formed between the above-mentioned heat pipe extension 32 and the heat pipe 31.

[0056] Exemplarily, the length of the above-mentioned heat pipe extension 32 is less than or equal to the length of the battery cell 331 in the battery 33.

[0057] Exemplarily, the material of the above-mentioned heat pipe extension 32 is a heat-conducting material. For example, a metal material.

[0058] Exemplarily, the size of the above-mentioned heat pipe extension 32 matches the size of the gap between the adjacent battery cells 331.

[0059] It can be understood that the matching of the size of the above-mentioned temperature equalizing extension member 32 and the size of the gap between the adjacent battery cells 331 means that the above-mentioned temperature equalizing extension member 32 can be arranged in the gap between the adjacent battery cells 331.

[0060] Furthermore, the above-mentioned temperature equalizing extension member 32 can be in contact with the battery cell 331. For example, it can be directly attached, or it can be not in direct contact with the battery cell 331. The embodiments of the present application do not make any limitations in this regard.

[0061] It should be noted that when the above-mentioned temperature equalizing extension member 32 is not in direct contact with the battery cell 331, the distance between the temperature equalizing extension member 32 and the battery cell 331 is less than a preset distance threshold, and this preset distance threshold can ensure that the temperature equalizing extension member 32 equalizes the temperature and dissipates heat for the above-mentioned battery cell 331.

[0062] As Figure 1 It can be seen that Figure 1 For the cooperation of the heat dissipation plate 31 and the battery cell 331, that is, a partial schematic diagram of the temperature equalizing extension member 32 arranged between adjacent battery cells 331. Among them, the heat dissipation plate 31 is located on the side close to the battery cell 331, and the temperature equalizing extension member 32 penetrates into the gap between adjacent battery cells 331 in the battery cell module 332 to help the battery cell 331 dissipate heat in the height direction.

[0063] In the embodiments of the present application, the above-mentioned temperature equalizing extension member 32 is used to balance the temperature of the above-mentioned battery 33 and conduct the heat of the above-mentioned battery 33 to the above-mentioned heat dissipation plate 31.

[0064] Optionally, as Figure 1 and Figure 2 shown, in the embodiments of the present application, at least one heat conduction tube 34 is arranged on at least part of the above-mentioned temperature equalizing extension member 32, and the above-mentioned heat conduction tube 34 is arranged opposite to the above-mentioned battery cell 331.

[0065] Exemplarily, in order to enable the temperature equalizing extension member 32 to equalize the temperature and dissipate heat for the battery cell 331 with higher efficiency, a heat conduction tube 34 can be arranged for the temperature equalizing extension member 32.

[0066] Exemplarily, the relative arrangement of the above-mentioned heat conduction tube 34 and the battery cell 331 means that the heat conduction tube 34 is arranged on the surface of the temperature equalizing extension member 32 close to the battery cell 331.

[0067] It can be understood that the above-mentioned heat conduction tube 34 can be arranged on part of the temperature equalizing extension member 32 or on all of the temperature equalizing extension member 32. The embodiments of the present application do not make any limitations in this regard.

[0068] Furthermore, each temperature equalizing extension member 32 can include one heat conduction tube 34 or can include multiple heat conduction tubes 34. The embodiments of the present application do not make any limitations in this regard.

[0069] InFigure 1 and Figure 2 Among the temperature-equalizing extension member 32 and the heat-conducting tubes 34 shown, each battery cell 331 is provided with a corresponding heat-conducting tube 34, and each temperature-equalizing extension member 32 includes a plurality of heat-conducting tubes 34 arranged uniformly, so as to ensure to the greatest extent the temperature-equalizing and heat-dissipating effects of the temperature-equalizing extension member 32 for the battery cells 331.

[0070] Optionally, in the embodiment of the present application, the above-mentioned temperature-equalizing extension member 32 includes at least one installation structure, and the above-mentioned installation structure is suitable for installing the above-mentioned heat-conducting tubes 34.

[0071] Exemplarily, the connection between the heat-conducting tube 34 and the temperature-equalizing extension member 32 can be a fixed and detachable connection method or a fixed and non-detachable connection method, and the present application does not make any limitation thereto.

[0072] For example, the above-mentioned heat-conducting tube 34 can be directly and non-detachably welded to the above-mentioned temperature-equalizing extension member 32 by welding, and the above-mentioned heat-conducting tube 34 can also be detachably embedded or clamped in the above-mentioned temperature-equalizing extension member 32 through an embedding or clamping structure, and the embodiment of the present application does not make any limitation thereto.

[0073] Exemplarily, in the case where the connection between the heat-conducting tube 34 and the temperature-equalizing extension member 32 can be a detachable connection method, in the embodiment of the present application, the above-mentioned installation structure includes a groove on the opposite surface of the temperature-equalizing extension member 32 and the battery cell 331.

[0074] Exemplarily, the shape of the above-mentioned groove matches that of the heat-conducting tube 34.

[0075] Exemplarily, the above-mentioned temperature-equalizing extension member 32 can be an extended planar structure or a structure of other shapes, and this structure can ensure that heat-conducting tubes 34 can be arranged on the temperature-equalizing extension member 32 and can be arranged between adjacent battery cells 331 in the battery 33.

[0076] As Figures 1 to 3 shown, Figure 2 is Figure 1 the cooperation state of the battery cell 331 in Figure 3 and the temperature-equalizing device 30 provided, that is, when the temperature-equalizing extension members 32 of the temperature-equalizing device 30 are respectively arranged between adjacent battery cells 331 in the battery 33. Figure 2 is a partial enlarged schematic view of region B in

[0077] It can be seen from Figure 1 that the temperature-equalizing extension member 32 includes a groove, and the groove of the temperature-equalizing extension member 32 can be embedded with a heat-conducting tube 34. Since Figure 1 the heat-conducting tube 34 has been embedded in the groove of the temperature-equalizing extension member 32 inFigure 1 The boundary of the middle groove is the boundary of the heat conduction tube 34.

[0078] Exemplarily, the matching of the shape of the groove and the heat conduction tube 34 may include the matching of the shape profile of the groove and the shape profile of the heat conduction tube 34, and may also include the matching of the size of the groove and the size of the heat conduction tube 34.

[0079] Exemplarily, the number of the grooves is greater than or equal to the number of the heat conduction tubes 34.

[0080] In one example, the groove is related to the heat exchange demand efficiency of the battery 33. It can be understood that the higher the heat exchange demand efficiency, the more heat conduction tubes 34 are required, and correspondingly, the more grooves; on the contrary, the lower the heat exchange demand efficiency, the fewer heat conduction tubes 34 are required, and correspondingly, the fewer grooves.

[0081] It can be understood that since the heat conduction tube 34 is detachably arranged in the groove, therefore, the number of the heat conduction tubes 34 can be set according to the actual requirements of the average temperature and the heat dissipation efficiency, so as to ensure that the cost of the heat conduction tube 34 will not be too high while ensuring the average temperature and the heat dissipation effect of the temperature equalizing device 30.

[0082] Furthermore, the groove and the heat conduction tube 34 are detachably matched with each other, so that the heat conduction tube 34 can be firmly installed in the groove and can also be taken out. In this way, it is convenient to replace the heat conduction tube 34 when there is a problem with its heat conduction performance, without the need to replace all the temperature equalizing plates 31 uniformly, enhancing the maintainability and reliability of the temperature equalizing plate 31 while reducing the use cost of the temperature equalizing plate 31.

[0083] Optionally, as Figures 1 to 5 shown, in the embodiment of the present application, the heat conduction tube 34 is a sealed structure with a cavity 341, a heat conduction medium is arranged in the cavity 341 of the heat conduction tube 34, and the heat conduction medium flows in the cavity 341 of the heat conduction tube 34.

[0084] It can be understood that in order to achieve the effect of temperature equalization, a heat conduction medium for heat conduction needs to be arranged inside the heat conduction tube 34. At the same time, in order to enable the heat conduction medium to circulate and be reused in the heat conduction tube 34, the heat conduction tube 34 needs to be set as a sealed structure with a cavity 341, so as to ensure that the heat conduction medium will not flow out, and at the same time, it flows back and forth in the cavity 341 with the temperature difference of the battery cells 331 relatively arranged with the heat conduction tube 34, so as to achieve the temperature equalization effect.

[0085] Optionally, in the embodiment of the present application, the heat conduction medium absorbs heat at the first end of the heat conduction tube 34 and then flows to the second end of the heat conduction tube 34, and after dissipating heat at the second end, it flows along the side wall 342 of the heat conduction tube to the first end.

[0086] Exemplarily, the first end and the second end are any two ends of the heat conduction tube 34.

[0087] Exemplarily, the shape of the heat conduction tube 34 includes any one of the following: straight tube shape, bent tube shape.

[0088] In one example, as Figure 4 and Figure 5 shown, when the shape of the heat conduction tube 34 is a straight tube shape, the first end and the second end are the two ends on the left and right sides of the heat conduction tube 34 in Figure 5 it.

[0089] In another example, as Figure 6 shown, when the shape of the heat conduction tube 34 is a bent tube shape, the first end and the second end can be the two outermost ends of the heat conduction tube 34; it can also be that the first end is one of the outermost ends of the heat conduction tube 34, and the second end is any bent end of the heat conduction tube 34. The embodiments of the present application do not make any limitations in this regard.

[0090] It can be understood that when the heat conduction tube 34 is in a straight tube shape, the structure of the heat conduction tube 34 is regular, simple, easy to manufacture, and has the advantage of low manufacturing cost. When the shape of the heat conduction tube 34 is a bent tube shape, its front view shape can be a multi-bent structure, increasing the heat conduction distance and heat conduction area, and thus the heat conduction effect is increased.

[0091] Exemplarily, the heat conduction medium can be a heat conduction fluid. Among them, the evaporation temperature and condensation temperature of the heat conduction fluid correspond to the working threshold temperature of the battery 33.

[0092] Exemplarily, the above-mentioned working threshold temperature is used to indicate: the highest working temperature of the battery 33 when it maintains a normal working state.

[0093] It can be understood that when the temperature of the heat conduction fluid is higher than the working threshold temperature of the battery 33, the heat conduction fluid evaporates and becomes gaseous; when the temperature of the heat conduction fluid is lower than the working threshold temperature of the battery 33, the heat conduction fluid condenses and becomes liquid.

[0094] Furthermore, in the embodiments of the present application, since the temperature of the battery cells 331 in the battery 33 is not balanced, therefore, in the same battery cell 331, the temperatures of different regions are different. Based on this, the change in the gas-liquid state of the above-mentioned heat conduction fluid can be utilized to flow in the heat conduction tube 34, and then adjust and balance the temperature of the battery cells 331 with a temperature difference corresponding to the heat conduction tube 34.

[0095] Optionally, the pipe diameter of the heat conduction tube 34 is smaller than a preset pipe diameter.

[0096] Exemplarily, a tubular structure with a preset pipe diameter adsorbs fluid against the direction of gravity based on capillary pressure.

[0097] It can be understood that, as Figure 4 and Figure 5 shown, Figure 4 a front elevation sectional view for showing the heat conduction tube 34, Figure 5 a side view for showing the heat conduction tube 34. In some cases, the temperature difference of the battery cell 331 is such that the temperature on the side close to the ground is lower than the temperature on the side far from the ground. Generally, as a heat conduction medium for temperature equalization, it often achieves the effect of temperature equalization by changing its form (for example, absorbing heat when changing from liquid to gas and dissipating heat when changing from gas to liquid). When the heat conduction medium that needs to be in a liquid state on the side far from the ground in the battery cell 331 absorbs heat for temperature equalization, it is necessary to set the pipe diameter of the heat conduction tube 34 to a pipe diameter with capillary action, so that the liquid heat conduction medium can move upward along the side wall 342 of the heat conduction tube against the direction of gravity, and reach the side far from the ground in the heat conduction tube 34 from bottom to top according to the principle of capillary pressure to absorb heat for temperature equalization. It can be seen that Figure 5 the thickness of the heat conduction tube 34 is very small, thus, a flat tube structure can be formed.

[0098] Exemplarily, the material of the above-mentioned heat conduction tube 34 is a metal heat conduction material.

[0099] It can be understood that the thermal conductivity of the metal material is better than that of ordinary materials. Therefore, the material of the heat conduction tube 34 is a metal heat conduction material. For example, the material of the heat conduction tube 34 can be copper.

[0100] Furthermore, the above-mentioned heat conduction tube 34 is a sealed structure with a cavity 341, and a heat conduction fluid is arranged in the cavity 341. Since the structure of the heat conduction tube 34 is sealed, this part of the heat conduction fluid cannot flow out. Since the structure of the heat conduction tube 34 is hollow, this part of the heat conduction fluid can exist in two different states, namely liquid or gas, in the heat conduction tube 34.

[0101] It can be understood that the volume of the above-mentioned heat conduction fluid is smaller than the volume of the cavity 341 in the heat conduction tube 34. Specifically, when the above-mentioned heat conduction fluid becomes a gas, the corresponding gas volume of the heat conduction fluid will not exert too much pressure on the side wall 342 of the heat conduction tube 34 of the heat conduction tube 34 to cause the heat conduction tube 34 to deform.

[0102] It can be understood that for the heat conduction tube 34, different structures can have different heat conduction areas, and thus different heat conduction effects. Taking the shape of the heat conduction tube 34 as a straight tube as an example, the working process of the heat conduction tube 34 is described as follows:

[0103] As Figure 4 shown, Figure 4It is the cross-section of the front elevation view of the heat pipe 34 in a straight tube shape, and the heat pipe 34 contains a working fluid inside. The working fluid absorbs heat and evaporates into steam after the temperature of the battery cell 331 is higher than the working threshold temperature, and at the place where the temperature of the battery cell 331 is lower than the working threshold temperature, the steam dissipates heat and condenses into a liquid.

[0104] Specifically, the working mode and principle inside the heat pipe 34 are as follows: when there is a temperature difference in the height direction of the battery cell 331, steam is formed on the side with a temperature higher than the working threshold temperature. The steam evaporates upward and conducts heat to the side of the heat pipe 34 close to the heat spreader 31. Then, the steam is on the side with a temperature lower than the working threshold temperature and condenses into a heat-conducting fluid. The condensed heat-conducting fluid then returns to the side with a temperature higher than the working threshold temperature and evaporates again along the inner wall 342 of the heat pipe by means of the capillary action of the working fluid, thereby realizing the transfer of heat (the direction of heat transfer is as indicated by the arrow in Figure 4 ). Due to the internal circulation of the heat pipe 34 and the driving force of the pressure difference formed by the steam on both the high-temperature and low-temperature sides, the heat pipe 34 can continuously establish and maintain an equilibrium state, so the temperature difference in the height direction of the battery cell 331 will remain relatively balanced and stable.

[0105] Furthermore, it can be understood that when the shape of the heat pipe 34 is a straight tube shape, the heat generated by the battery cell module 332 of the battery 33 will not remain inside the battery system, but is conducted to the corresponding heat spreader extension 32 through the straight-tube heat pipe 34 and then conducted to the heat spreader 31. Since the straight-tube heat pipe 34 has the function of temperature equalization, it can not only reduce the heat difference of the battery cell module 332 in the height direction inside the battery system, but also reduce the temperature difference between the battery cell modules 332, and the performance of the battery 33 is improved. In practical applications, when the battery 33 is in the fast charging mode, the heat generated by the battery cell module 332 can be quickly taken out of the battery system, which can effectively improve the fast charging ability of the battery system.

[0106] In the heat equalization device 30 of the battery provided in the present application, the heat equalization device 30 includes a heat spreader 31 and a plurality of heat spreader extensions 32 that are connected to one side of the heat spreader 31 and are arranged at intervals. Among them, the plurality of heat spreader extensions 32 are respectively adapted to be arranged between adjacent battery cells 331 in the battery 33. In this way, since the heat spreader extensions 32 can be extended and arranged in the middle of the battery cells 331, the heat of the battery cells 331 in the battery 33 can be conducted in a timely and rapid manner, and the heat of the battery cells 331 with temperature differences can be balanced in a timely manner through the heat spreader extensions 32, so that the heat dissipation efficiency of the battery 33 is greatly improved, and further the safety of the battery 33 is improved.

[0107] In an embodiment of the present application, it further includes a battery 33. The battery 33 includes a plurality of battery cells 331 arranged side by side and the aforementioned temperature equalizing device 30. The heat dissipation plate 31 is disposed on the same side of the plurality of battery cells 331, and the plurality of heat dissipation extension members 32 are respectively disposed between adjacent battery cells 331.

[0108] Optionally, as Figure 1 and Figure 7 shown, wherein, Figure 1 is a three-dimensional structural schematic diagram of the heat exchange plate 70, Figure 7 is a top view structural schematic diagram of the heat exchange plate 70. In an embodiment of the present application, in order to better ensure the heat dissipation effect of the battery 33, the battery 33 may further include: a heat exchange plate 70, the heat exchange plate 70 and the heat dissipation plate 31 are opposite to each other and are disposed on the other side of the plurality of battery cells 331.

[0109] Exemplarily, the heat exchange plate 70 and the heat dissipation plate 31 being opposite to each other and disposed on the other side of the plurality of battery cells 331 may include: the heat exchange plate 70 and the heat dissipation plate 31 are respectively disposed on two sides of the battery cells 331 in the battery 33.

[0110] Exemplarily, the heat exchange plate 70 may be a liquid cooling plate.

[0111] Optionally, in an embodiment of the present application, the heat exchange plate 70 includes at least one heat exchange area 71. The battery cell 331 extends along a first direction a and lead terminals are disposed at both ends of the battery cell 331 along the first direction a. A plurality of the battery cells 331 are arranged along a second direction b to form at least one battery cell module 332. The first direction a and the second direction b intersect. One heat exchange area 71 corresponds to one battery cell module 332. The heat exchange area 71 includes a plurality of flow channels for flowing a heat exchange medium.

[0112] It can be understood that each battery cell 331 has a positive pole and a negative pole. Among them, the positive and negative poles are located at both ends of the battery cell 331 along the first direction a. Generally, the temperature of the area where the positive and negative poles are located is relatively high. The lead terminals are located at both ends of the battery cell 331 along the first direction a. That is, the temperature range of the two ends of the battery cell 331 where the lead terminals are located is greater than the temperature range of the middle area of the battery cell 331.

[0113] Furthermore, in the battery cell module 332 formed by a plurality of battery cells 331 along the second direction b, the temperature range at both ends of the battery cell module 332 along the first direction a is greater than the temperature range in the middle of the battery cell module 332 along the first direction a. Therefore, when arranging the first flow channel 72, the second flow channel 73, and the third flow channel 74 for cooling in the heat exchange plate 70, it is necessary to set according to the magnitude of the temperature difference range of the battery cell module 332.

[0114] Further, the battery 33 may include a plurality of battery cell modules 332. The temperature difference range of each battery cell module 332 is such that the temperature range at both ends along the first direction a is greater than the temperature range in the middle along the first direction a. Therefore, a plurality of heat exchange regions 71 also need to be correspondingly provided in the heat exchange plate 70 corresponding to the installation position of the battery 33. A first flow channel 72, a second flow channel 73, and a third flow channel 74 are provided in each heat exchange region 71. The setting manner of different flow channels is set according to the magnitude of the temperature difference range of the battery cell module 332. For the specific setting manner, please refer in detail to Figure 7 and the subsequent description.

[0115] Exemplarily, the above-mentioned flow channels include a first flow channel 72, a second flow channel 73, and a third flow channel 74. The first flow channel 72 and the third flow channel 74 are respectively provided at both ends of the battery cell 331 along the first direction a, and the second flow channel 73 is provided in the middle of the battery cell 331 along the first direction a;

[0116] Exemplarily, one end of the first flow channel 72 and one end of the third flow channel 74 are both connected to the inlet 75 of the heat exchange plate, the other end of the first flow channel 72 and the other end of the third flow channel 74 are both connected to the second flow channel 73, and the second flow channel 73 is connected to the outlet 76 of the heat exchange plate.

[0117] Optionally, in the embodiment of the present application, a plurality of the battery cell modules 332 are arranged along the first direction a and / or the second direction b, and a plurality of the heat exchange regions 71 are provided in one-to-one correspondence with the plurality of battery cell modules 332.

[0118] Exemplarily, in the case where the heat exchange plate 70 includes a plurality of heat exchange regions 71, the temperature change amplitudes of different heat exchange regions 71 are different.

[0119] As Figure 2 shown, it includes two battery cell modules 332 arranged side by side in the second direction b. Correspondingly, the heat exchange region 71 of the heat exchange plate 70 also corresponds to the two battery cell modules 332 arranged side by side.

[0120] Exemplarily, the second direction b may be the arrangement direction of the battery cells 331 in the battery 33, and the first direction a may be the horizontal extension direction of the battery cells 331. For example, as Figure 2 shown in Figure 2 , it includes a plurality of battery cells 331. The battery cells 331 are arranged along the second direction, and correspondingly, the battery cell modules 332 composed of a plurality of battery cells 331 are integrally placed along the first direction a intersecting the second direction b.

[0121] Exemplarily, the intersection of the first direction a and the second direction b may include: the first direction a and the second direction b are perpendicular to each other, and may also include other angles, which are not limited in the embodiments of the present application. For example, as Figure 2 shown, in Figure 2 , the setting direction of the battery cell 331 and the placing direction of the battery cell module 332 are perpendicular to each other.

[0122] Exemplarily, the heat exchange medium may be a medium with relatively high heat conduction efficiency.

[0123] In one example, when the heat exchange plate 70 is a liquid cooling plate, the coolant provided in the liquid cooling plate may be used as the heat exchange medium to dissipate heat from the battery cell 331 in the battery 33.

[0124] It can be understood that the two end regions of the battery cell 331 along the first direction a are regions with a relatively large temperature difference range, located on both sides of the heat exchange region 71, that is, the regions corresponding to the first flow channel 72 and the third flow channel 74; correspondingly, the middle region of the battery cell 331 along the first direction a is a region with a relatively small temperature difference range, located in the middle of the heat exchange region 71, that is, the region corresponding to the second flow channel 73.

[0125] It can be further understood that since the temperature difference range of the region of the battery cell module 332 corresponding to the regions where the first flow channel 72 and the third flow channel 74 are located is larger than the temperature difference range of the region of the battery cell module 332 corresponding to the second flow channel 73, therefore, the heat exchange efficiency of the heat exchange medium in the first flow channel 72 and the third flow channel 74 is higher than the heat exchange efficiency of the heat exchange medium in the second flow channel 73. Based on this, in order to ensure the heat exchange medium efficiency of the heat exchange medium in the first flow channel 72 and the third flow channel 74, the first flow channel 72 and the third flow channel 74 are arranged at a position closer to the inlet 75 of the heat exchange medium than the third flow channel 74 is to the inlet 75 of the heat exchange medium. Correspondingly, the first flow channel 72 and the third flow channel 74 are arranged at a position farther from the outlet 76 of the heat exchange medium than the second flow channel 73 is to the outlet 76 of the heat exchange medium.

[0126] Further, the first flow channel 72 and the third flow channel 74 are connected to the outlet 76 through the second flow channel 72.

[0127] Optionally, in the embodiments of the present application, the second flow channel 73 includes two sub-flow channels, the other ends of the first flow channel 72 and the third flow channel 74 are respectively communicated with the two sub-flow channels, and the two sub-flow channels are both communicated with the outlet 76.

[0128] Exemplarily, as Figure 7 shown, in Figure 7In [description], the second flow channel 73 includes a sub-flow channel 731 and a sub-flow channel 732. One end of the first flow channel 72 away from the inlet 75 is communicated with the sub-flow channel 731, and one end of the third flow channel 74 away from the inlet 75 is communicated with the sub-flow channel 732. At the same time, both the sub-flow channel 731 and the sub-flow channel 732 are communicated with the outlet 76.

[0129] Optionally, in the embodiment of the present application, the above-mentioned flow channel further includes a first connecting flow channel 77. One end of the first connecting flow channel 77 is communicated with the inlet 75, and the other end of the first connecting flow channel 77 is communicated with the first flow channel 72 and the third flow channel 74;

[0130] And / or, the above-mentioned flow channel further includes a second connecting flow channel 78. One end of the second connecting flow channel 78 is communicated with the outlet 76, and the other end of the second connecting flow channel 76 is communicated with the two sub-flow channels.

[0131] It can be understood that, as Figure 7 shown, in Figure 7 , one end of the first connecting flow channel 77 is connected to the inlet 75, and both the first flow channel 72 and the third flow channel 74 are connected to the other end of the first connecting flow channel 77; correspondingly, one end of the second connecting flow channel 78 is connected to the outlet 76, and the other end of the second connecting flow channel 75 is connected to the sub-flow channel 731 and the sub-flow channel 732.

[0132] It should be noted that since both the first flow channel 72 and the third flow channel 74 are connected to the other end of the first connecting flow channel 77, in a possible embodiment, there is a sequence in the inflow of the heat exchange medium in the first flow channel 72 and the third flow channel 74, and they cannot be completely parallel. In Figure 7 , the heat exchange medium first flows into the first flow channel 72, and the third flow channel 74 flows into the heat exchange medium after the first flow channel 72.

[0133] Furthermore, in Figure 7 , after the heat exchange medium flows out of the third flow channel 74, it flows into the sub-flow channel 731 and the sub-flow channel 732 respectively, and is finally discharged from the outlet 76.

[0134] Optionally, in the embodiment of the present application, the above-mentioned inlet 75 and the above-mentioned outlet 76 are provided on the same side of the heat exchange plate 70.

[0135] As Figure 7 shown, both the inlet 75 and the outlet 76 are provided on the same side of the heat exchange plate 70.

[0136] Optionally, in the embodiment of the present application, the above-mentioned plurality of temperature equalizing extension members 32 are respectively attached between the opposite two sides of the adjacent above-mentioned battery cells 331.

[0137] As Figure 1 and Figure 2 shown, inFigure 1 and Figure 2 As can be seen, the two opposite sides of the temperature equalizing extension member 32 that face the battery cell 331 are in complete contact.

[0138] Exemplarily, the thickness of the heat conduction tube 34 and the thickness of the groove are the same as the spacing between the adjacent battery cells 331.

[0139] Exemplarily, the thickness of the above-mentioned heat conduction tube 34 matches the spacing between the above-mentioned battery cells 331.

[0140] It can be understood that the thickness of the heat conduction tube 34 needs to enable the heat conduction tube 34 to extend into the gap between the battery cells 331 along with the temperature equalizing extension member 32. Therefore, the sum of the thickness of the heat conduction tube 34 and the thickness of the temperature equalizing extension member 32 should be less than or equal to the distance between the adjacent battery cells 331.

[0141] Exemplarily, the structure of the above-mentioned heat conduction tube 34 matches the structure of the gap space between the above-mentioned battery cells 331.

[0142] The following describes the cooperation and usage method of the heat exchange plate 70 and the battery 33 as follows:

[0143] As Figure 1 shown, in Figure 1 , it includes a temperature equalizing plate 31, a plurality of battery cells 331, and a battery tray 35. The battery tray 35 corresponds to the two battery cell modules 332 formed by the battery cells 331. Specifically, the battery tray 35 includes a first space 351 and a second space 352. The sizes of the first space 351 and the second space 352 match the battery cell module 332, and each space holds a battery cell module 332.

[0144] Below the battery tray 35, that is, on the opposite side of the temperature equalizing plate 31 on the side of the battery 33, a heat exchange plate 70 is provided. The heat exchange plate 70 can be a liquid cooling plate. The heat exchange plate 70 is used to cool the two battery cell modules 332 in the battery tray 35.

[0145] Exemplarily, the above-mentioned battery tray 35 can be made of a material with good heat conduction performance, such as metal, so as to be able to transfer the heat of the battery cell module 332 in time and cool it in time through the heat exchange plate 70.

[0146] Exemplarily, the liquid cooling path of the coolant in the above-mentioned heat exchange plate 70 matches the position of the tab temperature distribution of the above-mentioned battery 33 in the working mode.

[0147] Exemplarily, the above-mentioned coolant can be a flowing liquid with a large heat dissipation coefficient. For example, water or other liquids.

[0148] Exemplarily, the number of cooling branches of the coolant in the above liquid cooling plate matches the number of cell modules 332 of the above battery 33. For example, when the number of cell modules is 2, each cell module includes 2 cooling branches, then the liquid cooling plate includes 4 cooling branches.

[0149] Optionally, as described above, when the heat exchange plate 70 is a liquid cooling plate, the above liquid cooling plate includes a plurality of liquid cooling channels, and the arrangement of the liquid cooling channels and the liquid cooling path of the coolant in the liquid cooling channels match the position of the tab temperature distribution of the battery 33 in the working mode.

[0150] Furthermore, in this Figure 1 In it, the above heat spreader 31 cools the cell module 332 in the height direction of the cell module 332. In this way, most of the heat generated by the cell 331 is taken out of the battery system through the heat exchange plate 70, and the temperature difference generated in the height direction of the cell 331 is conducted to the heat spreading extension 32 of the heat spreader 31 for heat dissipation and cooling.

[0151] Optionally, in the embodiments of the present application, the above heat spreader 31 can also be updated to a heat exchange plate 70. The heat exchange plate 70 includes a liquid cooling plate and a plurality of heat spreading extensions 32. The plurality of heat spreading extensions 32 are connected to one side of the liquid cooling plate and are spaced apart. The plurality of heat spreading extensions 32 are adapted to be respectively arranged between adjacent cells 331 in the battery 33

[0152] Exemplarily, the heat spreading extension 32 is used to balance the temperature of the battery 33 and conduct the heat of the battery 33 to the heat exchange plate 70.

[0153] The present application also provides an embodiment, and this embodiment is an electrical device. The above electrical device includes the aforementioned battery.

[0154] Among the several modules or units mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0155] It should be noted that for the details not disclosed in the battery of the embodiments of the present application, please refer to the details disclosed in the above embodiments of the present application, and they will not be elaborated here.

[0156] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of disclosure involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the foregoing disclosure concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

1. A battery temperature equalization device, characterized in that: The temperature equalizing device comprises: Temperature balancing plate; A plurality of temperature-averaging extension pieces are connected to one side of the temperature-averaging plate and are arranged at intervals. The plurality of temperature-averaging extension pieces are suitable for being respectively arranged between adjacent battery cells in the battery.

2. The temperature equalizing device according to claim 1, characterized in that: At least one heat conducting pipe is disposed on at least part of the temperature-averaging extension member, and the heat conducting pipe is disposed opposite to the battery core.

3. The temperature equalizing device according to claim 2, characterized in that: The temperature-isolating extension member includes at least one mounting structure, and the mounting structure is suitable for mounting the heat-conducting pipe.

4. The temperature equalizing device according to claim 3, characterized in that: The mounting structure includes a groove on the surface of the temperature-isolating extension piece opposite to the battery core, and the groove matches the shape of the heat-conducting pipe.

5. The temperature equalizing device according to claim 2, characterized in that: The heat-conducting pipe is a sealed structure with a cavity. A heat-conducting medium is arranged in the cavity of the heat-conducting pipe, and the heat-conducting medium flows in the cavity of the heat-conducting pipe.

6. The temperature equalizing device according to claim 5, characterized in that: The heat transfer medium absorbs heat at the first end of the heat transfer pipe and flows to the second end of the heat transfer pipe, and dissipates heat at the second end and flows along the side wall of the heat transfer pipe to the first end.

7. The temperature equalizing device according to claim 2, characterized in that: The diameter of the heat conducting pipe is smaller than the preset diameter.

8. The temperature equalizing device according to claim 5, characterized in that: The shape of the heat conducting pipe includes any one of the following: a straight pipe shape, a curved pipe shape.

9. The temperature equalizing device according to claim 2, characterized in that: The material of the heat conducting pipe is a metal heat conducting material.

10. A battery, characterized in that: The battery comprises a plurality of battery cells arranged side by side and the temperature equalizing device according to any one of claims 1 to 9, the temperature equalizing plate is arranged on the same side of the plurality of battery cells, and the plurality of temperature equalizing extension members are respectively arranged between adjacent battery cells.

11. The battery according to claim 10, characterized in that The battery further includes a heat exchange plate, which is opposite to the temperature balancing plate and is disposed on the other side of the plurality of battery cells.

12. The battery according to claim 11, characterized in that The heat exchange plate includes at least one heat exchange area, the battery core extends along a first direction and lead terminals are arranged at both ends of the battery core along the first direction, a plurality of the battery cores are arranged along a second direction to form at least one battery core module, the first direction and the second direction intersect, one heat exchange area corresponds to one battery core module, and the heat exchange area includes a plurality of flow channels for circulating heat exchange medium; The flow channel includes a first flow channel, a second flow channel, and a third flow channel, the first flow channel and the third flow channel are respectively arranged at two ends of the battery cell along the first direction, and the second flow channel is arranged in the middle of the battery cell along the first direction; One end of the first flow channel and one end of the third flow channel are both connected to the inlet of the heat exchange plate, the other end of the first flow channel and the other end of the third flow channel are both connected to the second flow channel, and the second flow channel is connected to the outlet of the heat exchange plate.

13. The battery according to claim 12, characterized in that The second flow channel includes two sub-flow channels, the other end of the first flow channel and the other end of the third flow channel are respectively connected to the two sub-flow channels, and the two sub-flow channels are both connected to the outlet.

14. The battery according to claim 13, characterized in that The flow channel further includes a first communicating flow channel, one end of the first communicating flow channel is connected to the inlet, and the other end of the first communicating flow channel is connected to the first flow channel and the third flow channel; And / or, the flow channel further includes a second connecting flow channel, one end of the second connecting flow channel is connected to the outlet, and the other end of the second connecting flow channel is connected to the two sub-flow channels.

15. The battery according to any one of claims 12 to 14, characterized in that: The inlet and the outlet are arranged on the same side of the heat exchange plate.

16. The battery according to any one of claims 12 to 14, characterized in that: There are multiple battery cell modules and they are arranged along the first direction and / or the second direction. There are multiple heat exchange areas and they are arranged in one-to-one correspondence with the multiple battery cell modules.

17. The battery according to any one of claims 10 to 14, characterized in that: The plurality of temperature-isolating extension members are respectively attached between two opposite side surfaces of adjacent battery cells.

18. An electrical equipment, characterized in that: The electrical device comprises the battery according to any one of claims 10-17.

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