Thermal management device, battery module and electric equipment

Abstract

The utility model provides a thermal management device, a battery module and electric equipment, and the thermal management device comprises a heat conductor which is configured to be filled in gaps among a plurality of batteries; and the heater comprises a heating part, and the heating part is embedded in the heat conductor. According to the utility model, the heater is arranged in the heat conductor, so that the heat conduction effect of the heat conductor can be improved, and the heat conductor is arranged in the gap between the batteries, so that the space between the batteries can be fully utilized, and meanwhile, the heat management effect can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a kind of thermal management device, battery module, battery pack and electric equipment. BACKGROUND

[0002] Lithium battery is very sensitive to ambient temperature, high temperature, low temperature and temperature imbalance can bring fatal influence to lithium battery, therefore, lithium battery system generally sets up thermal management system to carry out temperature management to lithium battery.

[0003] At present, the common thermal management mode for battery is to use serpentine water-cooled plate to cool, heat and equalize temperature, and this type of thermal management mode has remarkable effect, but the required space and weight are relatively more, and it is difficult to apply to some lithium batteries with limited space and weight (such as some electric tools, electric two-wheeled vehicles, etc.). SUMMARY

[0004] The embodiment of the utility model provides a kind of thermal management device, battery module and electric equipment, can improve the technical problem of large space and heavy weight existed in existing thermal management mode.

[0005] In the first aspect, the embodiment of the utility model provides a kind of thermal management device, comprising:

[0006] Thermal conductor is configured to be filled in the gap between multiple batteries;

[0007] Heater includes heating part, and the heating part is embedded in the thermal conductor.

[0008] In the embodiment of the utility model, by setting heater in thermal conductor, heating source and thermal conductor can be directly contacted, and the heat conduction effect is improved, by setting thermal conductor in the gap between batteries, the space between batteries can be fully utilized, the overall space occupied by battery module can be saved, and the thermal management effect can be improved.

[0009] In an embodiment, the heater is a PTC heating rod, and the heating part of the heating rod extends along the axial direction of the battery;And / or

[0010] The heating part is arranged on the central axis of the gap.

[0011] In the embodiment of the utility model, PTC heating rod has constant temperature heating characteristic, its principle is that PTC thermistor self-heating temperature rise after power on makes resistance value enter jump area, constant temperature heating PTC thermistor surface temperature keeps constant, this temperature only relates with PTC thermistor's curie temperature and applied voltage, and is basically irrelevant with ambient temperature, so can promote heat management effect. By setting heating part on the middle axis of the gap, the uniformity of heat conduction to the surrounding can be improved, and the heat management effect is improved.

[0012] In an embodiment, the surfaces of the heat conductors facing away from the heating parts are respectively fitted to the peripheral surfaces of the batteries around them.

[0013] In the embodiment of the utility model, by making the surfaces of the heat conductors facing away from the heating parts respectively fitted to the peripheral surfaces of the batteries around them, the space between the batteries can be fully utilized, and it is also beneficial to the full heat conduction of the heat conductors.

[0014] In an embodiment, the heat conductors are phase change material layers.

[0015] In the embodiment of the utility model, by setting the heat conductors as phase change material layers, the heat conductors can maintain the basic constancy of temperature by absorbing and emitting a large amount of latent heat through the phase change process. When the battery appears high temperature and needs to be cooled, the phase change material can well absorb heat and play a significant temperature equalizing effect, so that the heat can be fully utilized, and the heat management effect is improved.

[0016] In a second aspect, the embodiment of the utility model provides a battery module, comprising:

[0017] a plurality of batteries;

[0018] The above heat management device is configured to be filled in the gap formed between the plurality of batteries.

[0019] In an embodiment, the batteries are cylindrical batteries, and the plurality of batteries are arranged in a triangular array. The heat conductor comprises three arc surfaces facing away from the heating part and matching the peripheral surfaces of the three batteries around them.

[0020] In the embodiment of the utility model, by arranging the cylindrical batteries in a triangular array, the space utilization can be improved, thereby reducing the volume of the battery module. By setting the heat conductor as having three arc surfaces, the heat conductor can fully utilize the space between the cylindrical batteries, thereby improving the heat management effect.

[0021] In an embodiment, the batteries are cylindrical batteries, and the plurality of batteries are arranged in a linear array. The heat conductor comprises two arc surfaces facing away from the heating part and matching the peripheral surfaces of the two batteries around them.

[0022] In the embodiment of the utility model, through setting the heat conductor as having two arc surfaces, the heat conductor can make full use of the space between the cylindrical batteries, thereby improving the heat management effect.

[0023] In an embodiment, the battery is a cylindrical battery, and a plurality of the batteries are arranged in a checkered array, and the heat conductor comprises four arc surfaces away from the heat generating part and matched with the peripheral surfaces of the four surrounding batteries.

[0024] In the embodiment of the utility model, through setting the heat conductor as having four arc surfaces, the heat conductor can make full use of the space between the cylindrical batteries, thereby improving the heat management effect.

[0025] In an embodiment, a plurality of the cylindrical batteries define a plurality of the gaps, and the heat management device is arranged in each of the gaps.

[0026] In the embodiment of the utility model, through arranging the heat management device in each of the gaps, the heat management effect can be improved.

[0027] In an embodiment, the battery module further comprises a busbar, the heater further comprises an output wire harness, the output wire harness is electrically connected with the heat generating part, the busbar and the output wire harness are arranged at the two axial ends of the battery respectively, and the positive electrode and the negative electrode of the battery are arranged at the same axial end of the battery as the busbar.

[0028] In the embodiment of the utility model, by arranging the busbar and the output wire harness at the two axial ends of the battery respectively, the contact between the busbar and the output wire harness can be avoided, the output wire harness can be prevented from being cut by the busbar to cause short circuit, and the electrical and thermal separation can be facilitated. By arranging the positive electrode and the negative electrode of the battery at the same side, the electrical and thermal separation can also be facilitated.

[0029] In an embodiment, the battery module further comprises a first fixing member and a second fixing member arranged oppositely, the battery is fixedly arranged between the first fixing member and the second fixing member, the busbar is fixedly arranged on the first fixing member, the second fixing member is provided with a wire outlet hole, and the output wire harness passes through the wire outlet hole to be led out from the second fixing member.

[0030] In the embodiment of the utility model, by arranging the wire outlet hole on the second fixing member, the fixing and leading out of the output wire harness can be realized.

[0031] In a third aspect, the embodiment of the utility model provides a power utilization equipment comprising the above battery module. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0033] Figures 1-3 is a structural schematic view of a heat management device provided by an embodiment of the present application;

[0034] Figure 4 is a structural schematic view of a battery module provided by an embodiment of the present application (a first fixing member is shown in part);

[0035] Figures 5-7 is a top view of a battery module provided by an embodiment of the present application (a first fixing member and a heat management device are not shown).

[0036] BRIEF DESCRIPTION OF DRAWINGS: heater-1; heating part-11; output harness-12; heat conductor-2; camber-21; battery-3; negative electrode-31; positive electrode-32; busbar-4; first fixing member-5; second fixing member-6; wire outlet hole-61. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing in the drawings. And "inner" and "outer" refer to the outline of the device.

[0038] Please refer to Figures 1-3 , in a first aspect, the embodiments of the present application provide a heat management device, comprising:

[0039] The heat conductor 2 is configured to be filled in the gap between the plurality of batteries 3.

[0040] The heater 1 comprises a heating part 11, and the heating part 11 is embedded in the heat conductor 2.

[0041] It can be understood that the battery can be a cylindrical battery, a square battery or other shaped battery. The batteries 3 arranged in an array can be in contact with each other or kept a distance from each other. In order to make the overall structure of the battery module more compact, in the embodiment, the batteries 3 arranged in an array are arranged close to each other. The heat conductor 2 is made of a material having a heat conduction effect. The shape of the heat conductor 2 can be set as needed. The heat conductor 2 can fill the entire gap or partially fill the gap, which can be set according to the need of thermal management. It should be noted that the filling and partial filling here are in the axial direction of the battery 3. The heat conductor 2 fills the entire gap, which means that the size of the heat conductor 2 in the axial direction of the battery 3 is consistent with the axial length of the battery 3. Correspondingly, the heat conductor 2 partially fills the gap, which means that the size of the heat conductor 2 in the axial direction of the battery 3 is smaller than the axial length of the battery 3. The axial length of the heat conductor 2 along the battery 3 can be set according to the need of thermal management. For the case of the heat conductor 2 along the radial direction of the battery 3, the heat conductor 2 is in contact with the battery 3 around it, and even the shape of the circumferential surface of the heat conductor 2 is adapted to the shape of the circumferential surface of the battery 3 around it. The heat conductor 2 can be fixed by being clamped between the batteries 3 around it, thereby facilitating installation. The heater 1 is a device having a heating function, and the heating part 11 is a heating component of the heater 1. The heating part 11 can be embedded in the heat conductor 2, and then the heater can be fixed by being embedded in the heat conductor 2. Of course, the heat conductor 2 can be provided with a mounting hole in the axial direction thereof, and the heating part 11 can be inserted into the mounting hole. The mounting hole can be a through hole or a blind hole. When the external environment of the battery module is in a low-temperature environment, heating conditions need to be provided, at which time the heater 1 is turned on to heat the battery 3 through the heat conductor 2.

[0042] In an embodiment, the heater 1 is a PTC heating rod, and the heating part 11 of the heating rod extends along the axial direction of the battery 3. Since the axial size of the battery is usually larger than the radial size thereof, extending the heating part 11 along the axial direction of the battery 3 helps to improve the heating efficiency. In order to further improve the heating efficiency, the heating part 11 can extend from one end of the heat conductor 2 to the other end of the heat conductor 2.

[0043] The heating part 11 is arranged on the central axis of the gap. By arranging the heating part 11 on the central axis of the gap, it is helpful to make the heating part 11 uniformly heat the batteries around it, thereby improving the uniformity of temperature.

[0044] It can be understood that the specific values of the diameter and length of the heating rod can be set according to the size of the heat conductor 2, the size of the gap and the need of thermal management.

[0045] In an embodiment, the surface of the heat conductor 2 away from the heating part 11 respectively abuts the circumferential surface of the battery 3 around it.

[0046] It can be understood that by matching the shape of the surface of the heat conducting body 2 away from the heat generating part 11 with the peripheral surface shape of the battery 3 around it, the heat conducting effect is facilitated. In some embodiments, the surface of each heat conducting body 2 away from the heat generating part 11 respectively matches the partial peripheral surface of each battery 3 around it. The three adjacent heat conducting bodies 2 can wrap the peripheral surface of the battery 3 therebetween.

[0047] In an embodiment, the heat conducting body 2 is a phase change material layer.

[0048] It can be understood that the phase change material refers to a substance that changes the state of matter without changing the temperature and can provide latent heat, including inorganic phase change materials and organic phase change materials, which can be selected as needed.

[0049] Referring to Figures 1-7 , in a second aspect, the embodiments of the utility model provide a battery module, comprising:

[0050] a plurality of batteries 3;

[0051] The above-mentioned heat management device is configured to be filled in the gap formed between the plurality of batteries 3.

[0052] It can be understood that the heat management device can be arranged in all gaps formed between the batteries 3, or can be arranged in part of the gaps formed between the batteries 3, and the number and position of the heat management device can be arranged according to the heat management requirement. When the heat management device is arranged in part of the gaps formed between the batteries 3, the plurality of heat management devices can be uniformly distributed so as to ensure the uniformity of the battery module.

[0053] Referring to Figure 1 and Figure 5 In an embodiment, the battery 3 is a cylindrical battery, a plurality of the battery 3 is arranged in a triangular array, two adjacent rows of the battery 3 are arranged in a staggered manner, and the heat conducting body 2 comprises three arc surfaces 21 away from the heat generating part 11 and matching the peripheral surfaces of the three batteries 3 around it.

[0054] It can be understood that the three arc surfaces 21 of the heat conducting body 2 match the peripheral surfaces of the batteries 3 around it, which can realize stable fixation of the heat conducting body 2 and improve the heat conducting effect.

[0055] Referring to Figure 2 and Figure 6 In an embodiment, the battery 3 is a cylindrical battery, a plurality of the battery 3 is arranged in a linear array, and the heat conducting body 2 comprises two arc surfaces 21 away from the heat generating part 11 and matching the peripheral surfaces of the two batteries 3 around it.

[0056] It can be understood that the two arc surfaces 21 of the heat conducting body 2 match the peripheral surfaces of the batteries 3 around it, which can realize stable fixation of the heat conducting body 2 and improve the heat conducting effect.

[0057] Referring to Figure 3 and Figure 7 In an embodiment, the battery 3 is a cylindrical battery, and a plurality of the batteries 3 are arranged in a checkered array, and the heat conductor 2 comprises four arc surfaces 21 facing away from the heat generating part 11 and matching the circumferential surfaces of the four surrounding batteries 3.

[0058] It can be understood that the four arc surfaces 21 of the heat conductor 2 are attached to the circumferential surfaces of the surrounding batteries 3, which can realize stable fixation of the heat conductor 2 and improve the heat conduction effect.

[0059] In an embodiment, the plurality of batteries 3 define a plurality of gaps, and the heat management device is arranged in each gap.

[0060] It can be understood that the heat management device is arranged in each gap, which can make the circumferential surface of the battery 3 in the middle be fully surrounded by the surrounding heat conductors 2, which is beneficial to sufficient heat exchange.

[0061] In an embodiment, the battery module further comprises a bus bar, the heater 1 further comprises an output wire harness 12, the output wire harness 12 is electrically connected with the heat generating part 11, the bus bar and the output wire harness 12 are arranged at the two axial ends of the battery 3, and the positive electrode 32, the negative electrode 31 of the battery 3 and the bus bar are arranged at the same axial end of the battery 3.

[0062] It can be understood that the output wire harness 12 can transmit electric energy to the heater 1, thereby realizing the heating function of the heater 1.

[0063] In an embodiment, the battery module further comprises a first fixing member 5 and a second fixing member 6 arranged oppositely, the battery 3 is fixedly arranged between the first fixing member 5 and the second fixing member 6, the bus bar is fixedly arranged on the first fixing member 5, the second fixing member 6 is provided with a wire outlet hole 61, and the output wire harness 12 passes through the wire outlet hole 61 to be led out from the second fixing member 6.

[0064] In an embodiment, the first fixing member 5 can be an upper fixing clamping plate, and the second fixing member 6 can be a lower fixing clamping plate.

[0065] It can be understood that the upper fixing clamping plate can be a plastic plate with insulation performance, and the lower fixing clamping plate can be a plastic plate with insulation performance or a metal plate after spraying.

[0066] In the embodiment of the utility model, the wire outlet hole 61 arranged on the second fixing member 6 can realize fixation and leading out of the output wire harness 12.

[0067] In a third aspect, the embodiments of the utility model provide a kind of electric equipment, including above-mentioned battery module.

[0068] The above detailed description of the embodiments of the utility model is provided, the principle and implementation mode of the utility model are described by applying specific examples in this paper, and the above embodiment is only used to help understand the method and core idea of the utility model;At the same time, for the skilled in the art, according to the idea of the utility model, there will be changes in specific implementation mode and application range, as described above, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A thermal management device, characterized by, include: A heat conductor is configured to fill the gaps between multiple batteries; A heater, including a heating element, the heating element being embedded in the heat conductor; The battery is a cylindrical battery, and multiple batteries are arranged in a triangular array. The heat conductor includes three arc surfaces that are away from the heat-generating part and match the circumferential surfaces of the three batteries around it. Alternatively, the battery is a cylindrical battery, and multiple batteries are arranged in a grid-like array. The heat conductor includes four arc surfaces that are away from the heat-generating part and match the circumferential surfaces of the four surrounding batteries.

2. The thermal management device of claim 1, wherein, The heater is a PTC heating rod, and the heating part of the heating rod extends along the axial direction of the battery; and / or The heating element is positioned on the central axis of the gap.

3. The thermal management device of claim 2, wherein, The surface of the heat conductor away from the heat-generating part is respectively attached to the peripheral surface of the battery around it.

4. The thermal management device of any of claims 1-3, wherein, The heat conductor is a phase change material layer.

5. A battery module, characterized by include: Multiple batteries; The thermal management device as claimed in any one of claims 1-4 is configured to fill the gap formed between the plurality of said batteries.

6. The battery module of claim 5, wherein, The plurality of batteries define the plurality of gaps, and the thermal management device is disposed in each of the gaps.

7. The battery module of claim 5, wherein, The battery module further includes a busbar, and the heater further includes an output harness. The output harness is electrically connected to the heating element. The busbar and the output harness are respectively disposed at both ends of the axial direction of the battery. The positive and negative terminals of the battery and the busbar are disposed at the same end of the axial direction of the battery.

8. The battery module of claim 7, wherein, The battery module further includes a first fixing member and a second fixing member disposed opposite to each other. The battery is fixedly disposed between the first fixing member and the second fixing member. The busbar is fixedly disposed on the first fixing member. The second fixing member is provided with a wire outlet hole. The output wire harness passes through the wire outlet hole to be led out from the second fixing member.

9. An electric device, characterized by Includes the battery module as described in any one of claims 5-8.

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