KR102559958B1 - Plate heater for battery pack and battery pack using the same - Google Patents

Abstract

A surface heating heater for a battery pack and a battery pack using the same are provided. A planar heater for a battery pack according to an embodiment of the present invention includes a first heating layer, a pair of electrode layers disposed on one surface of the first heating layer to be divided uniformly, a second heating layer disposed on one surface of the pair of electrode layers, having a rectangular frame shape and disposed at a position corresponding to the rim of the first heating layer, a first insulating layer disposed between the first heating layer and the pair of electrode layers, and a second insulating layer disposed between the pair of electrode layers and the second heating layer. , a protective layer disposed on the opposite surface of the first heating layer, and a base layer disposed on one surface of the second heating layer. Here, the first insulating layer is provided with first vias electrically connecting the first heating layer and each pair of electrode layers, and the second insulating layer is provided with second vias electrically connecting each pair of electrode layers and the second heating layer.

Description

Plate heater for battery pack and battery pack using the same {Plate heater for battery pack and battery pack using the same}

The present invention relates to a planar heating heater for a battery pack and a battery pack using the same.

A battery, also commonly referred to as a storage battery or a secondary battery, is a device that converts chemical energy into electrical energy. The intrinsic electrochemical or electrophysical properties of these batteries are greatly influenced by the external environment in which the battery pack is used.

In particular, in the case of a lithium battery, the temperature of the external environment where the battery pack is used has a great influence on the performance and lifespan of the battery pack. In general, the optimal operating temperature condition of a battery cell is around 25°C, and the guaranteed temperature for a battery cell during discharge is -20°C to 70°C. When the battery cell is used at a temperature around 25° C., which is the optimum operating temperature condition, the efficiency (99%) of the battery cell is excellent and its lifespan is also increased. To this end, a heating technology for increasing the temperature of the battery pack is applied when the outdoor temperature is low.

However, since the conventional battery pack heating technology does not consider heating according to the position of the battery cell, a temperature deviation occurs according to the position of the battery cell in the battery pack, which causes an imbalance between the battery cells, thereby deteriorating the performance of the battery pack and shortening its lifespan.

In order to solve the problems of the prior art as described above, one embodiment of the present invention is to provide a surface heating heater for a battery pack capable of minimizing a temperature deviation over the entire battery pack and a battery pack using the same.

However, the problem to be solved by the present invention is not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to one aspect of the present invention for solving the above problems, the first heating layer; a pair of electrode layers disposed on one surface of the first heating layer to be uniformly divided; a second heating layer disposed on one surface of the pair of electrode layers, having a rectangular frame shape, and disposed at a position corresponding to an edge of the first heating layer; a first insulating layer disposed between the first heating layer and the pair of electrode layers; a second insulating layer disposed between the pair of electrode layers and the second heating layer; a protective layer disposed on the opposite side of the first heating layer; And a base layer disposed on one surface of the second heating layer, wherein the first insulating layer is provided with a first via electrically connecting the first heating layer and each of the pair of electrode layers, and the second insulating layer is provided with a second via electrically connecting each of the pair of electrode layers and the second heating layer.

In one embodiment, the first heating layer and the second heating layer may be made of the same material.

In one embodiment, the first heating layer and the second heating layer may be made of different materials.

In one embodiment, the first heating layer may include one or more types of carbon particles selected from the group consisting of carbon black, carbon nanotubes, graphite, and activated carbon, and the second heating layer may be formed of a metal wire having a zigzag pattern.

In one embodiment, a width of an edge of the second heating layer may be greater than a diameter of a battery cell included in a battery pack.

In one embodiment, the second heating layer includes a first terminal portion and a second terminal portion provided to protrude from both sides; And a first pattern layer and a second pattern layer disposed symmetrically about the first terminal part and the second terminal part, wherein the first terminal part includes the first via and the second via. A common terminal electrically connected to the first heating layer is included, and the common terminal can be electrically connected to both the first pattern layer and the second pattern layer.

In one embodiment, the second terminal unit includes an integrated terminal electrically connected to the first heating layer through the first via and the second via, and the integrated terminal may be electrically connected to both the first pattern layer and the second pattern layer.

In one embodiment, the second terminal portion a first terminal connected to one side of the first pattern layer; a second terminal disposed spaced apart from the first terminal and connected to one side of the second pattern layer; and third terminals spaced apart from each other between the first terminal and the second terminal and electrically connected to the first heating layer through the first via and the second via.

According to another aspect of the invention, a plurality of battery cells; a case accommodating the plurality of battery cells; and a planar heating heater as described above disposed on the lower surfaces of the plurality of battery cells within the case.

A planar heating heater for a battery pack and a battery pack using the same according to an embodiment of the present invention by dual heating a battery cell disposed at the outermost part of the battery pack, thereby minimizing the temperature deviation between the battery cell disposed at the outermost part of the battery pack and the battery cell disposed at the center side, thereby preventing performance deterioration and shortening of life of the battery pack.

In addition, since the present invention provides separate terminals for the first heating layer, the first pattern layer, and the second pattern layer, it is possible to selectively or dually control heat generation according to the position of a plurality of battery cells, so power consumption can be optimized.

1 is a perspective view of a battery pack having a planar heating heater for a battery pack according to an embodiment of the present invention.
FIG. 2 is a graph showing the temperature distribution of a conventional battery pack taken along line XX′ of FIG. 1 .
3 is a perspective view of a planar heating heater for a battery pack according to an embodiment of the present invention.
4 is an exploded view of a surface heating heater for a battery pack according to an embodiment of the present invention.
5 is an enlarged view of part A of FIG. 4 .
6 is an enlarged view of part B of FIG. 4 .
FIG. 7 is a cross-sectional view taken along line Y-Y′ of FIG. 3 .
8 is an equivalent circuit diagram of a planar heating heater for a battery pack according to an embodiment of the present invention.
FIG. 9 is a graph showing the temperature distribution of a battery pack having a planar heating heater for a battery pack according to an embodiment of the present invention taken along line XX′ of FIG. 1 .
10 is another example of a second terminal part of a planar heating heater for a battery pack according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. This invention may be embodied in many different forms and is not limited to the embodiments set forth herein. In order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and the embodiments described below may be modified in many different forms, and the scope of the present invention is not limited to the following examples. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the spirit of the invention to those skilled in the art.

Hereinafter, embodiments of the present invention will be described with reference to drawings schematically showing embodiments of the present invention. In the drawings, variations of the depicted shape may be expected, depending, for example, on manufacturing techniques and/or tolerances. Therefore, the embodiments of the present invention should not be construed as being limited to the specific shape of the area shown in this specification, but should include, for example, a change in shape caused by manufacturing.

1 is a perspective view of a battery pack having a planar heating heater for a battery pack according to an embodiment of the present invention.

1, a battery pack 10 having a planar heating heater 100 for a battery pack according to an embodiment of the present invention may include a case 11, a battery cell 12, and a planar heating heater 100 for a battery pack.

The battery pack 10 may be a battery pack for an electric vehicle. As an example, the electric means of transportation may include an electric vehicle, an electric bicycle, an aircraft, and an electric kickboard. That is, the battery pack 10 may be mounted on an electric means of transportation to provide power for electric driving and to charge it.

The case 11 may accommodate a plurality of battery cells 12 and a surface heating heater 100 for a battery pack.

The battery cell 12 may be a cylindrical secondary battery. As an example, the battery cell 12 may be a lithium ion battery. In the drawing, only the plurality of battery cells 12 are shown as being embedded in the case 11, but the space between the plurality of battery cells 12 or the space between the plurality of battery cells 12 and the case 11 may be filled with a complementary material for fixing the plurality of battery cells 12.

The planar heating heater 100 for a battery pack may be disposed on the lower surface of the plurality of battery cells 12 in the case 11 . Although not shown in the drawing, the planar heating heater 100 for a battery pack receives power from a power supply device (not shown) under the control of a controller (not shown) to generate heat and emits radiant heat to the outside. It may be a film-type radiant heater.

FIG. 2 is a graph showing the temperature distribution of a conventional battery pack taken along line XX′ of FIG. 1 .

Referring to FIG. 2 , in a conventional battery pack, even when a planar heating heater is provided on the lower surface of a plurality of battery cells and heated by the planar heating heater, the battery pack shows a temperature deviation Δt according to the positions of the plurality of battery cells. In particular, a significant drop in temperature occurs in a battery cell disposed at the outermost part of the battery pack. That is, a large temperature drop appears at a position corresponding to the diameter (d) of the battery cell from the outer surface of the battery pack.

The reason is that when the battery cell is heated from the planar heating heater side to the upper side by the heating of the planar heating heater on the lower side of the battery cell, a time difference in heat conduction occurs, and at the same time, the outer portion of the battery pack is continuously affected by the surrounding cooling energy, so thermal energy loss occurs. In particular, since the battery cells disposed at the corners of the battery pack are affected by the surroundings in two directions, the temperature deviation Δt appears larger.

At this time, when the temperature difference (Δt) between the battery cells is 5° C. or more, a difference in the charge/discharge amount of the battery cell with the highest temperature and the charge/discharge amount of the battery cell with the lowest temperature occurs, resulting in serious non-uniformity of state of charge (SOC) between the battery cells.

In general, while one battery pack is being charged and discharged, a battery cell having a high temperature and a battery cell having a low temperature do not change. That is, some battery cells continuously maintain a higher temperature state than other battery cells, and some battery cells continuously maintain a lower temperature state than other battery cells. When these phenomena are accumulated, serious non-uniformity in the lifespan of individual battery cells is caused, which leads to a decrease in the lifespan of the entire battery pack.

To this end, the planar heating heater 100 for a battery pack according to an embodiment of the present invention prevents energy loss by dual-heating the outermost area vulnerable to the external environment, particularly the corner portion of the battery pack 10, and a plurality of battery cells (12) It has a hybrid structure to reduce the temperature deviation.

Hereinafter, a planar heating heater 100 for a battery pack according to an embodiment of the present invention will be described in more detail with reference to FIGS. 3 to 10 .

3 is a perspective view of a planar heating heater for a battery pack according to an embodiment of the present invention, FIG. 4 is an exploded view of the planar heating heater for a battery pack according to an embodiment of the present invention, and FIG. 5 is an enlarged view of portion A of FIG.

Referring to FIG. 3 , the planar heating heater 100 for a battery pack may be provided with protrusions 102 and 104 corresponding to electrode terminals on both sides as a whole. Here, heater power may be supplied to electrode terminals corresponding to the protrusions 102 and 104 .

In addition, the planar heating heater 100 for a battery pack may include dual heating layers. Here, the first heating layer 120 corresponds to the entire area of the planar heating heater 100 for the battery pack, and the second heating layer 160 corresponds to the edge of the planar heating heater 100 for the battery pack.

4, the planar heating heater 100 for a battery pack may include a protective layer 110, a first heating layer 120, a first insulating layer 130, an electrode layer 140, a second insulating layer 150, a second heating layer 160, and a base layer 170.

Here, the protective layer 110, the first heating layer 120, the first insulating layer 130, the electrode layer 140, the second insulating layer 150, the second heating layer 160, and the base layer 170 may be sequentially stacked. Hereinafter, the positional relationship of each layer will be described with reference to FIG. 7. At this time, each layer may be bonded through an adhesive.

The protective layer 110 may be the uppermost layer of the planar heating heater 100 for a battery pack in the drawing. That is, the protective layer 110 may be disposed on the opposite side (eg, upper side) of the first heating layer 120 . The protective layer 110 may be provided with protrusions 112 and 114 on both sides. For example, the protective layer 110 may be made of an insulating plastic material or may be flexible.

For example, plastic materials include polyimide, polyethersulphone (PES), polyacrylate (PAR), polyacrylonitrile (PAN), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), and polyphenylene sulfide. (polyphenylenesulfide: PPS), polyallylate, polycarbonate (PC), cellulose triacetate (CTA), polyurethane (polyurethane; PU), silicone, or cellulose acetate propionate (cellulose acetate propinonate; CAP), etc. may be used, but is not limited thereto.

The first heating layer 120 is a planar heating element, and protrusions 122 and 124 may be provided on both sides. Here, the protrusions 122 and 124 may include first regions 122a and 124a corresponding to the first vias 132a and 134a provided in the first insulating layer 130 . Accordingly, the protrusions 122 and 124 may be electrically connected to the protrusions 142 and 144 of the electrode layer 140 through the first regions 122a and 124a and the first vias 132a and 134a.

For example, the first heating layer 120 may include a mixed binder and conductive particles. Here, the conductive particles may include conductive carbon particles or metal powder. The carbon particles may be at least one selected from the group consisting of carbon black, carbon nanotubes, graphite, and activated carbon. As the metal powder, at least one of silver, copper, or nickel powder may be used.

The resistivity of the first heating layer 120 may be determined by the content of carbon particles or metal powder in the total solid content. For example, resistivity can be adjusted only with carbon particles up to a range of 1×10 ^-2 Ωcm, but additional introduction of metal powder is required for a ^range below that range. Each planar heating element 133 may have a specific resistance of 9×10 ^-2 to 11×10 ^-3 Ωcm.

The first insulating layer 130 may be disposed between the first heating layer 120 and the electrode layer 140 . Here, the first insulating layer 130 may be made of a flexible plastic material similar to or identical to that of the protective layer 110 .

At this time, the first insulating layer 130 may have first vias 132a and 134a provided on both sides of the protrusions 132 and 134 . Here, the first vias 132a and 134a may be filled with a conductive material. Referring to FIG. 7 , the first vias 132a and 134a may electrically connect the first heating layer 120 and the pair of electrode layers 140a and 140b, respectively.

The electrode layer 140 may be disposed on one surface (eg, lower side) of the first heating layer 120 . In addition, the electrode layer 140 may be made of silver, aluminum, copper, nickel, stainless steel, or an alloy thereof.

Also, the electrode layer 140 may be a pair of electrode layers 140a and 140b to be uniformly divided. That is, the pair of electrode layers 140a and 140b may be spaced apart from each other in the center. Here, one of the pair of electrode layers 140a and 140b may be an anode and the other may be a cathode. For example, the electrode layer 140a may be a cathode and the electrode layer 140b may be an anode.

At this time, each of the pair of electrode layers 140a and 140b may be provided with protrusions 142 and 144 on one side. Here, the protrusions 142 and 144 may include second regions 142a and 144a corresponding to the first vias 132a and 134a. Accordingly, the protrusions 142 and 144 may be electrically connected to the protrusions 122 and 124 of the first heating layer 120 through the first regions 122a and 124a, the first vias 132a and 134a, and the second regions 142a and 144a.

The second insulating layer 150 may be disposed between the electrode layer 140 and the second heating layer 160 . Here, the second insulating layer 150 may be made of a flexible plastic material similar to or identical to that of the protective layer 110 .

In this case, the second insulating layer 150 may have second vias 152a and 154a provided on both sides of the protrusions 152 and 154 . Here, the second vias 152a and 154a may be filled with a conductive material. Referring to FIG. 7 , the second vias 152a and 154a may electrically connect each of the pair of electrode layers 140a and 140b and the second heating layer 160 .

The second heating layer 160 may be disposed on one surface (eg, lower side) of the electrode layer 140 . In this case, the second heating layer 160 may have a square frame shape. That is, the second heating layer 160 may be disposed at a position corresponding to the edge of the first heating layer 120 .

At this time, the second heating layer 160 may be provided with terminal portions 162 and 164 protruding from both sides. Here, the terminal units 162 and 164 may include a first terminal unit 162 and a second terminal unit 164 electrically connected to the pair of electrode layers 140a and 140b, respectively. For example, the first terminal portion 162 may be connected to the electrode layer 140a corresponding to the cathode, and the second terminal portion 164 may be connected to the electrode layer 140b corresponding to the anode.

In addition, each of the terminal units 162 and 164 may include third regions 162a and 164a corresponding to the second vias 152a and 154a. Accordingly, the terminal portions 162 and 164 may be electrically connected to the protrusions 142 and 144 of the electrode layer 140 through the second regions 142a and 144a, the second vias 152a and 154a, and the third regions 162a and 164a.

In this case, the second heating layer 160 may be made of the same material as the first heating layer 120 . That is, the second heating layer 160 may be formed of a planar heating element having a rectangular frame shape with an empty center. In the following description, a case in which the second heating layer 160 is different from the first heating layer 120 will be mainly described as an example, but these characteristics can be applied even when the second heating layer 160 is made of the same material as the first heating layer 120.

Alternatively, the second heating layer 160 may be made of a material different from that of the first heating layer 120 . For example, the second heating layer 160 may be made of metal. For example, the second heating layer 160 may be made of copper, silver or nickel.

In this case, the second heating layer 160 may be formed of metal lines 161a and 161b having a zigzag pattern. Here, the second heating layer 160 made of metal may be made of a line much thinner than the width (W) of the square frame.

Specifically, the second heating layer 160 is made of thin zigzag metal lines, but has a rectangular frame shape having a constant width W as a whole. Here, the width W may correspond to a length in which metal is repeated in a zigzag pattern.

Accordingly, since the second heating layer 160 has a thin thickness and a long electrical length, it may have a relatively large resistance compared to a planar body. Therefore, the second heating layer 160 can emit more heat for the same applied power.

Here, the width (W) of the edge of the second heating layer 160 may be greater than the diameter (d) of the battery cell 12 provided in the battery pack 10 . That is, the second heating layer 160 may be provided to completely cover the battery cells 12 disposed at the outermost part of the battery pack 10 . At this time, in addition to the first heating layer 120 , the second heating layer 160 may provide additional heat to the battery cells 12 disposed at the outermost part of the battery pack 10 .

Accordingly, when the battery pack 10 having the planar heating heater 100 for a battery pack according to an embodiment of the present invention is heated by the planar heating heater 100, the temperature difference between the outermost battery cell 12 and the center side battery cell 12 can be minimized.

The second heating layer 160 may include a first pattern layer 160a and a second pattern layer 160b disposed symmetrically with respect to the first terminal unit 162 and the second terminal unit 164 .

In this case, the first pattern layer 160a and the second pattern layer 160b may be connected to each other at the first terminal portion 162 and spaced apart from each other at the second terminal portion 164 .

Referring to FIG. 5 , the first terminal unit 162 may include a common terminal 163 electrically connected to the first heating layer 120 through the first via 132a and the second via 152a. Here, the common terminal 163 may be electrically connected to both the first pattern layer 160a and the second pattern layer 160b. That is, the common terminal 163 may have one side connected to the metal line 161b of the first pattern layer 160a and the other side connected to the metal line 161a of the second pattern layer 160b.

At this time, the common terminal 163 may be formed in an “E” shape. The protruding portion 163a between the metal lines 161a and 161b may include a third region 162a corresponding to the first via 132a and the second via 152a.

Referring to FIG. 6 , the second terminal unit 164 may include three terminals. That is, the second terminal unit 164 may include a first terminal 165 , a second terminal 166 , and a third terminal 167 .

The first terminal 165 may be connected to one side of the first pattern layer 160a. That is, the first terminal 165 may be connected to the metal line 161b.

The second terminal 166 may be connected to one side of the second pattern layer 160b. That is, the second terminal 166 may be connected to the metal line 161a. In this case, the first terminal 165 and the second terminal 166 may be spaced apart from each other. That is, the first pattern layer 160a and the second pattern layer 160b may be spaced apart from each other.

The third terminal 167 may be spaced apart from each other between the first terminal unit 162 and the second terminal unit 164 . In this case, the third terminal 167 may include a third region 164a corresponding to the first via 134b and the second via 154b.

Accordingly, in the planar heating heater 100 for a battery pack according to an embodiment of the present invention, the first pattern layer 160a and the second pattern layer 160b of the first heating layer 120 and the second heating layer 160 can be selectively controlled to generate heat, so power consumption can be optimized. In particular, the planar heating heater 100 for a battery pack may control the first heating layer 120 to generate heat and at least one of the first pattern layer 160a and the second pattern layer 160b to generate heat.

Referring back to FIG. 4 , the base layer 170 may be disposed on one side (eg, lower side) of the second heating layer 160 . The base layer 170 may be provided with protrusions 172 and 174 on both sides. Here, the base layer 170 may be made of a flexible plastic material similar to or identical to that of the protective layer 110 .

8 is an equivalent circuit diagram of a planar heating heater for a battery pack according to an embodiment of the present invention, and FIG. 9 is a planar heating heater for a battery pack according to an embodiment of the present invention along the line XX 'of FIG. 1. It is a graph showing the temperature distribution of a battery pack.

Referring to FIG. 8 , the first heating layer 120 and the second heating layer 160 may be represented as an equivalent circuit of resistance. The resistor R1 represents the resistance value of the first heating layer 120, the resistor R2 represents the resistance value of the first pattern layer 160a, and the resistor R3 represents the resistance value of the second pattern layer 160b.

That is, one side of the resistor R1 may be the third terminal 167, one side of the resistor R2 may be the first terminal 165, and one side of the resistor R3 may be the second terminal 166. At this time, the other side of each resistor (R1 to R3) may be a common terminal (163).

9, the temperature of the plurality of battery cells 12 at the center of the battery pack 10 is affected by the heating of the first heating layer 120, and the temperature of the plurality of battery cells 12 at the outer side of the battery pack 10 is affected by the heating of the first heating layer 120 and the second heating layer 160.

At this time, one side of the battery pack 10 is represented by the sum of the amount of heat generated by the first heating layer 120 (th _R1 ) and the amount of heat generated by the first pattern layer 160a (th _R2 ). Similarly, the other side of the battery pack 10 is represented by the sum of the amount of heat generated by the first heating layer 120 (th _R1 ) and the amount of heat generated by the second pattern layer 160b (th _R3 ).

As a result, the temperature of the plurality of battery cells 12 disposed near the edge of the battery pack 10 increases, thereby eliminating the temperature deviation Δt between the plurality of battery cells 12 .

At this time, the temperature difference between the outer side of the battery pack 10 corresponding to the second heating layer 160 and the inner side where only the first heating layer 120 is disposed may be controlled to be 25 to 35°C. Preferably, the temperature deviation between the first heating layer 120 and the second heating layer 160 on the outside and inside of the battery pack 10 may be controlled to 30°C. That is, the edges of the battery pack 10 heated by the dual of the first heating layer 120 and the second heating layer 160 can be heated to a higher temperature than the center of the battery pack 10 heated by the first heating layer 120 alone.

Therefore, the battery pack 10 can minimize a temperature difference between the outermost battery cell 12 and the inner battery cell 12 . For example, a temperature difference between the outermost battery cell 12 and the inner battery cell 12 may be minimized to within 5°C.

As a result, the planar heating heater 100 for a battery pack according to an embodiment of the present invention can minimize the temperature deviation between the battery cells 12 disposed at the outermost corners of the battery pack 10 and the battery cells 12 disposed at the center side. Therefore, it is possible to prevent performance deterioration and shortening of life of the battery pack.

10 is another example of a second terminal part of a planar heating heater for a battery pack according to an embodiment of the present invention.

The second terminal unit 164 ′ may be provided as a common electrode in the same manner as the first terminal unit 162 . That is, the second heating layer 160 may be electrically connected to both the first terminal unit 162 and the second terminal unit 164'.

More specifically, the second terminal unit 164' may include an integral terminal 168 electrically connected to the first heating layer 120 through the first via 134a and the second via 154a. Here, the integrated terminal 168 may be electrically connected to both the first pattern layer 160a and the second pattern layer 160b. That is, the integrated terminal 168 may have one side connected to the metal line 161b of the first pattern layer 160a and the other side connected to the metal line 161a of the second pattern layer 160b.

For example, the common terminal 163 of the integrated terminal 168 may be formed in an “E” shape. The protruding portion 168a between the metal lines 161a and 161b may include a third region 164a corresponding to the first via 134a and the second via 154a.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented herein, and those skilled in the art who understand the spirit of the present invention may easily suggest other embodiments by adding, changing, deleting, adding, etc.

10: battery pack 11: case
12: battery cell 100: surface heating heater for battery pack
110: protective layer 120: first heating layer
130: first insulating layer 132a, 134a: first via
140: electrode layer 150: second insulating layer
152a, 154a: second via 160: second heating layer
160a: first pattern layer 160b: second pattern layer
162: first terminal unit 163: common terminal
164, 164': second terminal part 165: first terminal
166: second terminal 167: third terminal
168: integrated terminal 170: base layer

Claims (9)

a first heating layer;
a pair of electrode layers disposed on one surface of the first heating layer to be uniformly divided;
a second heating layer disposed on one surface of the pair of electrode layers opposite to the first heating layer, having a rectangular frame shape, and disposed at a position corresponding to an edge of the first heating layer;
a first insulating layer disposed between the first heating layer and the pair of electrode layers;
a second insulating layer disposed between the pair of electrode layers and the second heating layer;
a protective layer disposed on the opposite side of the first heating layer; and
And a base layer disposed on one side of the second heating layer,
The first insulating layer is provided with a first via electrically connecting the first heating layer and each of the pair of electrode layers,
The second insulating layer is provided with a second via electrically connecting each of the pair of electrode layers and the second heating layer. According to claim 1,
The first heating layer and the second heating layer are planar heating heaters for battery packs made of the same material. According to claim 1,
The first heating layer and the second heating layer are planar heaters for battery packs made of different materials. According to claim 1,
The first heating layer includes at least one type of carbon particles selected from the group consisting of carbon black, carbon nanotubes, graphite, and activated carbon;
The second heating layer is a planar heating heater for a battery pack made of a metal wire having a zigzag pattern. According to claim 1,
The second heating layer is a surface heating heater for a battery pack in which the width of the edge is larger than the diameter of the battery cell provided in the battery pack. According to claim 5,
The second heating layer,
a first terminal unit and a second terminal unit provided to protrude from both sides; and
A first pattern layer and a second pattern layer disposed symmetrically with respect to the first terminal and the second terminal,
The first terminal unit includes a common terminal electrically connected to the first heating layer through the first via and the second via,
The common terminal is electrically connected to both the first pattern layer and the second pattern layer. According to claim 6,
The second terminal unit includes an integral terminal electrically connected to the first heating layer through the first via and the second via,
The integrated terminal is electrically connected to both the first pattern layer and the second pattern layer. According to claim 6,
The second terminal part,
a first terminal connected to one side of the first pattern layer;
a second terminal disposed spaced apart from the first terminal and connected to one side of the second pattern layer; and
A planar heating heater for a battery pack comprising a third terminal spaced apart from each other between the first terminal and the second terminal and electrically connected to the first heating layer through the first via and the second via. a plurality of battery cells;
a case accommodating the plurality of battery cells; and
A battery pack including a planar heating heater according to any one of claims 1 to 8 disposed on the lower surfaces of the plurality of battery cells in the case.

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