A liquid cooling plate structure and battery pack assembly

Abstract

The present invention discloses a liquid cooling plate structure and a battery pack assembly, wherein the liquid cooling plate structure includes a plate body, a cooling device and a heat storage component, wherein the plate body is used to connect with the battery pack and perform heat exchange; the cooling device is detachably provided on the plate body, and the cooling device is used to cool the plate body; the heat storage component is detachably provided on the plate body, and the heat storage component is used to absorb the heat of the plate body when the temperature of the plate body is higher than the target temperature range, and release the heat when the temperature of the plate body is lower than the target temperature range, so as to control the heat of the plate body to be maintained within the target temperature range. The present invention simultaneously provides a cooling device and a heat storage component to maintain the temperature of the plate body within the target temperature range, so as to keep the battery pack at a comfortable temperature and improve the electrical performance and safety of the battery pack.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a liquid cooling plate structure and a battery pack assembly. Background Art

[0002] The electrical performance and safety of the battery pack are closely related to the ambient temperature. The battery pack will continue to generate heat energy when working. If there is no heat dissipation structure, the temperature of the battery pack will be too high, affecting the safety of the battery, and even causing safety hazards such as fire and explosion. Therefore, it is necessary to dissipate heat from the battery pack when the battery pack is working. However, the current mainstream technology is to load a thermal management system inside the power battery or lay a layer of thermal pad (glue) to improve the conductivity, or directly use a fan for heat dissipation. Although it has a heat dissipation effect, the performance during heat dissipation is difficult to control, and when the battery pack is not working, the battery is in a completely cooled state. Overcooling and overheating will also affect the performance of the battery pack. Therefore, in order to improve electrical performance and safety, the battery pack needs to be "immersed" in a "comfortable temperature". Summary of the invention

[0003] The main purpose of the present invention is to propose a liquid cooling plate structure and a battery pack assembly, aiming to improve the electrical performance and safety of the battery pack.

[0004] To achieve the above-mentioned purpose, the present invention proposes a liquid cooling plate structure, comprising: a plate body, used to connect with a battery pack and perform heat exchange;

[0005] a cooling device, detachably disposed on the plate body, the cooling device being used to cool the plate body; and,

[0006] A heat storage component is detachably disposed on the plate body, and is used to absorb heat from the plate body when the temperature of the plate body is higher than a target temperature range, and to release heat when the temperature of the plate body is lower than the target temperature range, so as to control the heat of the plate body to be maintained within the target temperature range.

[0007] Optionally, the material of the heat storage element includes at least one of cyclopentane, nano-ceramic fiber curing agent, nano-silicon dioxide aerogel and silicate thermal insulation material.

[0008] Optionally, the cooling device comprises a plurality of cooling parts, and the heat storage element is provided in plurality, and each cooling part is arranged adjacent to each heat storage element.

[0009] Optionally, the liquid cooling plate structure further includes a plurality of cooling channels, wherein the cooling channels are used for circulation of heat exchange liquid, and at least part of the channel sections of the cooling channels constitute the cooling portion.

[0010] Optionally, the plate body includes a plurality of uniform temperature regions sequentially arranged along its length direction, each uniform temperature region is provided with a plurality of the cooling parts and a plurality of the heat storage elements, and each of the heat storage elements and each of the cooling parts are adjacently arranged.

[0011] Optionally, the cooling channel is arranged around the heat storage component in the uniform temperature area, with at least a partial channel section.

[0012] Optionally, the cooling channel is used to contain heat exchange fluid, and the cooling channel includes a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively used to connect to a liquid storage tank to form a circulation loop so that the heat exchange fluid circulates in the circulation loop.

[0013] Optionally, the cooling device includes a tube body, which is detachably arranged on the plate body, and the tube body forms the cooling channel.

[0014] Optionally, a groove is provided on the plate body, and the groove forms the cooling channel.

[0015] The present invention also proposes a battery pack assembly, which includes the liquid cooling plate structure as described above, and the liquid cooling plate structure includes a plate body, a cooling device and a heat storage component, wherein the plate body is used to connect with the battery pack and exchange heat; the cooling device is detachably provided on the plate body, and the cooling device is used to cool the plate body; the heat storage component is detachably provided on the plate body, and the heat storage component is used to absorb the heat of the plate body when the temperature of the plate body is higher than the target temperature range, and release the heat when the temperature of the plate body is lower than the target temperature range, so as to control the heat of the plate body to be maintained within the target temperature range.

[0016] In the technical solution of the present invention, the plate body is used to connect with the battery pack and perform heat exchange. The cooling device is arranged on the plate body to cool down the battery pack. The heat storage component can absorb the heat of the battery pack. When the temperature of the plate body is higher than the target temperature range, the heat is absorbed, and the battery pack is cooled in cooperation with the cooling device, and the temperature of the plate body is controlled within the target temperature range. When the plate body is lower than the target temperature range, the heat storage component will release the absorbed heat to heat the plate body, so that the temperature of the plate body and the battery pack is still controlled within the target temperature range. With such a configuration, the temperature of the battery pack and the plate body can always be controlled within the target temperature range. The target temperature range is a comfortable temperature for the battery pack, which avoids the influence of large temperature differences on the electrical performance and safety of the battery pack, and makes the battery pack have a longer service life and better performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 A top view of the liquid cooling plate structure provided by the present invention;

[0019] Figure 2 A schematic diagram of the cooling device.

[0020] Description of Figure Numbers:

[0021] Label name Label name 100 Liquid cooling plate structure 211 Liquid inlet 1 plate body 212 Liquid outlet 2 Cooling device 3 Heat storage parts 21 Cooling channels 4 Average temperature area

[0022] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] The electrical performance and safety of the battery pack are closely related to the ambient temperature. The battery pack will continue to generate heat energy when working. If there is no heat dissipation structure, the temperature of the battery pack will be too high, affecting the safety of the battery, and even causing safety hazards such as fire and explosion. Therefore, it is necessary to dissipate heat from the battery pack when the battery pack is working. However, the current mainstream technology is to load a thermal management system inside the power battery or lay a layer of thermal pad (glue) to improve conductivity, or directly use a fan for heat dissipation. Although it has a heat dissipation effect, the performance during heat dissipation is not easy to control, and when the battery pack is not working, the battery is in a completely cooled state. Overcooling and overheating will also affect the performance of the battery pack. Therefore, in order to improve the electrical performance and safety, the battery pack needs to be "immersed" in a "comfortable temperature". In view of this, the present invention provides a liquid cooling plate structure to solve the problem of improving the electrical performance and safety of the battery pack. Please refer to Figure 1 to Figure 2 , which is an embodiment of a liquid cooling plate structure provided in the present application.

[0027] See also Figure 1 The liquid cooling plate structure 100 includes a plate body 1, a cooling device 2 and a heat storage component 3. The plate body 1 is used to connect with the battery pack and perform heat exchange. The cooling device 2 is detachably provided on the plate body 1, and the cooling device 2 is used to cool the plate body 1. The heat storage component 3 is detachably provided on the plate body 1, and the heat storage component 3 is used to absorb the heat of the plate body 1 when the temperature of the plate body 1 is higher than the target temperature range, and release the heat when the temperature of the plate body 1 is lower than the target temperature range, so as to control the heat of the plate body 1 to be maintained within the target temperature range.

[0028] In the technical solution of the present invention, the plate body 1 is used to connect with the battery pack and exchange heat. The cooling device 2 is arranged on the plate body 1 to cool the battery pack. The heat storage component 3 can absorb the heat of the battery pack. When the temperature of the plate body 1 is higher than the target temperature range, the heat is absorbed, and the battery pack is cooled in cooperation with the cooling device 2, and the temperature of the plate body 1 is controlled within the target temperature range. When the plate body 1 is lower than the target temperature range, the heat storage component 3 will release the absorbed heat to heat the plate body 1, so that the temperature of the plate body 1 and the battery pack is still controlled within the target temperature range. With such a configuration, the temperature of the battery pack and the plate body 1 can be always controlled within the target temperature range. The target temperature range is a comfortable temperature for the battery pack, avoiding the influence of large temperature differences on the electrical performance and safety of the battery pack, and making the battery pack have a longer service life and better performance.

[0029] Specifically, the material of the heat storage element 3 includes at least one of cyclopentane, nano-ceramic fiber curing agent, nano-silicon dioxide aerogel and silicate thermal insulation material.

[0030] The heat storage component 3 requires a material with low conductivity to absorb heat, thereby reducing the heat conduction efficiency, slowly absorbing heat and slowly releasing heat, so that when the temperature is higher than the target temperature range, it can absorb heat and store the heat, and when the temperature is lower than the target temperature range, it can release heat to maintain the temperature of the plate body 1 within the target temperature range. The heat storage component 3 can be directly made of cyclopentane, nano-ceramic fiber curing agent, nano-silica aerogel, or a carrier containing liquid or solid fillers of cyclopentane, nano-ceramic fiber curing agent, and nano-silica aerogel, which is not specifically limited here.

[0031] Specifically, the cooling device 2 includes a plurality of cooling parts, and the heat storage element 3 is provided in plurality, and each cooling part is arranged adjacent to each heat storage element 3 .

[0032] Because in the process of cooling the battery pack, the cooling capacity of the cooling part is stronger than that of the heat storage part, the cooling efficiency will be different in different places during cooling, and the temperature difference between the heat storage part and the cooling part is large, which will also damage the electrical performance of the battery pack. Therefore, it is necessary to balance the heat of the cooling device 2 and the heat storage part 3 so that they are almost in an equal state, so the cooling part is set to be adjacent to the heat storage part 3. In this way, there is heat exchange between the cooling part and the heat storage part 3, and the cooling part transfers part of its own temperature to the heat storage part, so that the temperature of the heat storage part and the cooling part are equal.

[0033] Furthermore, the liquid cooling plate structure 100 further includes a plurality of cooling channels 21 , wherein the cooling channels 21 are used for allowing heat exchange liquid to flow, and at least a portion of the channel sections of the cooling channels 21 constitute the cooling portion.

[0034] The multiple cooling channels 21 are used for heat exchange fluid to flow for heat exchange. The heat exchange fluid is usually a heat exchange fluid or a refrigerant. During the flow, a portion of the temperature is continuously transferred to the battery pack to cool the battery pack, and another portion of the temperature is transferred to the heat storage element 3 to balance the temperature of the heat storage element 3 and the cooling unit. This arrangement allows the temperature of the heat storage element 3 and the cooling unit to be consistent, so that the temperature of each part of the plate body 1 is maintained within the target temperature range.

[0035] Furthermore, the plate body 1 includes a plurality of uniform temperature regions 4 sequentially arranged along its length direction, each uniform temperature region 4 is provided with a plurality of the cooling parts and a plurality of the heat storage components 3, and each of the heat storage components 3 and each of the cooling parts are adjacently arranged.

[0036] According to the heat dissipation of the battery pack, multiple heating areas will be formed on the plate body 1, and the corresponding heating areas of the battery pack need to be cooled. Such a setting can make the heat dissipation of the battery pack more targeted, and achieve the purpose of cost saving, while reducing the weight. The heat dissipation of the battery pack can be monitored first to find out the heat dissipation, and the heat storage component 3 and the cooling part are set accordingly. Therefore, in this embodiment, a plurality of uniform temperature areas 4 are sequentially arranged along the length direction of the plate body 1, and each uniform temperature area 4 corresponds to a place where the heat source of the battery pack is more concentrated. Each of the uniform temperature areas 4 is provided with a plurality of heat storage components 3 and the cooling part, and the uniform temperature areas 4 are concentratedly heated. In other embodiments, corresponding adjustments can also be made according to the actual heating position, which is not specifically limited here.

[0037] Specifically, the cooling channel 21 is disposed in the temperature-averaging region 4 , with at least a partial channel section surrounding the heat storage element 3 .

[0038] See also Figure 1 In this embodiment, in the uniform temperature region 4, the heat storage element 3 includes two first heat storage elements and a plurality of second heat storage elements, the two first heat storage elements are arranged at intervals, the plurality of second heat storage elements are arranged at intervals between the two first heat storage elements, and the plurality of second heat storage elements are arranged at intervals, the cooling channel 21 is arranged at intervals between two adjacent second heat storage elements, and the cooling channel 21 is arranged between the first heat storage element and the second heat storage element, and at least part of the channel section of the cooling channel 21 is arranged around the second heat storage element. Such an arrangement enables the heat exchange fluid in the cooling channel 21 to circulate around the second heat storage element, and to exchange heat to the greatest extent. The cooling channel 21 is also arranged between the first heat storage element and the second heat storage element, and exchanges heat with the first heat storage element. It is worth noting that the contact area between the first heat storage component and the plate body 1 is larger than the contact area between the second heat storage component and the plate body 1. With such a configuration, because the heat generated by the battery is radial, the temperature at the first heat storage component is generally not higher than the temperature at the second heat storage component. Therefore, the cooling channel 21 does not need to be arranged around the first heat storage component, saving costs. The area of ​​the first heat storage component is larger than that of the second heat storage component, and it can better absorb heat in areas with low temperatures, so that the temperatures at the intervals between the multiple uniform temperature areas 4 also tend to be consistent. With such a configuration, it is highly targeted and has a good uniform temperature effect, and can save costs.

[0039] See also Figure 2 The cooling channel 21 is used to contain the heat exchange liquid. The cooling channel 21 includes a liquid inlet 211 and a liquid outlet 212. The liquid inlet 211 and the liquid outlet 212 are respectively used to connect to the liquid storage tank to form a circulation loop so that the heat exchange liquid circulates in the circulation loop. The heat exchange liquid circulates in the cooling liquid channel, which can achieve a better cooling effect.

[0040] Specifically, the cooling device 2 includes a tube body, which is detachably arranged on the plate body 1 , and the tube body forms the cooling channel 21 .

[0041] When the tube body forms the cooling channel 21, it can be adjusted more conveniently and can be adjusted according to the specific situation of the battery pack. The tube body can be installed through a splint or fixed to the plate body 1 by glue, and no specific limitation is made here.

[0042] Specifically, a groove is formed on the plate body 1 , and the groove forms the cooling channel 21 .

[0043] When the trough body forms the cooling channel 21, because the trough body is not easy to change, it is necessary to accurately analyze the heat dissipation of the battery pack before opening it, and it is not convenient to change. However, the form of the trough body can save more space, and can accommodate more heat exchange fluid, and is not easy to be damaged.

[0044] Furthermore, the present invention also proposes a battery pack assembly, comprising the liquid cooling plate structure 100 as described above.

[0045] It is worth noting that the liquid cooling plate structure 100 proposed in the present invention has a good effect when applied to the heat dissipation of the battery pack. Compared with the ordinary structure with only the cooling device 2 or only the heat insulation device, the temperature distribution of the liquid cooling plate assembly proposed in this application is more uniform, and the temperature difference at each location does not exceed 2°C. When the battery pack assembly is not working, the cooling speed of the battery pack is slower, generally at 18655s, while the ordinary one is 11706s, which can effectively save electricity and can heat up faster when started at low temperature, with a heating rate of 0.21°C / min, which is lower than the ordinary 0.36°C / min. In summary, the liquid cooling plate structure 100 provided by the present invention can effectively improve the electrical performance and safety of the battery pack.

[0046] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A liquid cooling plate structure, characterized in that: include: A plate body, used to connect with the battery pack and perform heat exchange; a cooling device, detachably mounted on the plate, the cooling device being used to cool the plate; and a heat storage member, detachably disposed on the plate body, the heat storage member being used to absorb the heat of the plate body when the temperature of the plate body is higher than a target temperature range, and to release the heat when the temperature of the plate body is lower than the target temperature range, so as to control the heat of the plate body to be maintained within the target temperature range; The cooling device comprises a plurality of cooling parts, the heat storage element is provided with a plurality of cooling parts, and each cooling part is arranged adjacent to each heat storage element; The liquid cooling plate structure further comprises a plurality of cooling channels, wherein the cooling channels are used for circulating heat exchange liquid, and at least part of the channel sections of the cooling channels constitute the cooling part; The plate body comprises a plurality of uniform temperature regions sequentially arranged along its length direction, each uniform temperature region is provided with a plurality of the cooling parts and a plurality of the heat storage elements, and each of the heat storage elements and each of the cooling parts are arranged adjacently; In the uniform temperature region, at least a portion of the cooling channel is arranged around the heat storage element; The heat storage member includes two first heat storage members and a plurality of second heat storage members, the two first heat storage members are arranged at intervals, the plurality of second heat storage members are arranged at the intervals between the two first heat storage members, and the plurality of second heat storage members are arranged at intervals, the cooling channel is arranged at the intervals between two adjacent second heat storage members, and the cooling channel is arranged between the first heat storage member and the second heat storage member, at least a portion of the channel section of the cooling channel is arranged around the second heat storage member, and a contact area between the first heat storage member and the plate body is greater than a contact area between the second heat storage member and the plate body.

2. The liquid cooling plate structure according to claim 1, characterized in that: The heat storage element is made of at least one material including cyclopentane, nano-ceramic fiber curing agent, nano-silicon dioxide aerogel and silicate thermal insulation material.

3. The liquid cooling plate structure according to claim 1, characterized in that: The cooling channel is used to contain heat exchange fluid, and the cooling channel includes a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively used to connect to a liquid storage tank to form a circulation loop, so that the heat exchange fluid circulates in the circulation loop.

4. The liquid cooling plate structure according to claim 1, characterized in that: The cooling device comprises a tube body, which is detachably arranged on the plate body and forms the cooling channel.

5. The liquid cooling plate structure according to claim 1, characterized in that: A groove is formed on the plate body, and the groove forms the cooling channel.

6. A battery pack assembly, characterized in that: It comprises the liquid cooling plate structure as claimed in any one of claims 1 to 5.

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