CN209843807U - Battery pack - Google Patents
Battery pack Download PDFInfo
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- CN209843807U CN209843807U CN201920981451.6U CN201920981451U CN209843807U CN 209843807 U CN209843807 U CN 209843807U CN 201920981451 U CN201920981451 U CN 201920981451U CN 209843807 U CN209843807 U CN 209843807U
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- Prior art keywords
- battery
- voltage detection
- detection unit
- battery module
- battery cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model provides a can accept the group battery in outer body with voltage detection portion together efficient well with battery module. The Battery Pack (BP) includes: a battery module (1) configured by stacking a plurality of battery cells (110); a voltage detection unit (2) electrically connected to the electrode terminals (112, 113) of the battery cell (110) via a wiring member (23); and an exterior body (3) formed in a cylindrical shape and having an inner space (30) extending in the stacking direction of the battery cells (110), wherein the battery module (1) and the voltage detection unit (2) are housed in the inner space (30) of the exterior body (3), wherein the voltage detection unit (2) is disposed on a side surface (1a) of the battery module (1), and has a recess (35) capable of housing the voltage detection unit (2) on an inner surface (31a) of a side wall portion (31) of the exterior body (3) corresponding to the voltage detection unit (2).
Description
Technical Field
The utility model relates to a battery pack (battery pack) of battery module (battery module) has been acceptd, battery module is a plurality of range upon range of and constitute battery unit (cell) in the inboard space of the external packaging body.
Background
A hybrid car (hybrid car) or an electric car is equipped with a battery module in which a plurality of battery cells such as lithium ion (lithium ion) secondary batteries are stacked. Conventionally, as such a battery module, there is known a battery module in which a voltage detection unit detects and monitors a voltage of a battery cell in order to control the battery cell (see, for example, patent document 1).
[ Prior art documents ]
[ patent document ]
Patent document 1: japanese patent laid-open No. 2014-516457
SUMMERY OF THE UTILITY MODEL
[ problem to be solved by the utility model ]
When the battery modules are mounted on a vehicle or the like, it is conceivable to pack the battery modules in a pack by housing them in an exterior body in order to protect the battery cells. In this case, in the battery module including the voltage detection unit, it is required that the battery module is efficiently housed in the exterior body together with the voltage detection unit.
Therefore, an object of the present invention is to provide a battery pack that can efficiently accommodate battery modules and a voltage detection unit together in an outer case to form a battery pack.
[ means for solving problems ]
(1) The battery pack (for example, a battery pack BP described later) of the present invention includes: a battery module (for example, a battery module 1 described later) configured by stacking a plurality of battery cells (for example, battery cells 110 described later); a voltage detection unit (e.g., a voltage detection unit 2 described later) electrically connected to electrode terminals (e.g., a positive electrode terminal 112 and a negative electrode terminal 113 described later) of the battery cells via a wiring member (e.g., a harness 23 described later); and an exterior body (for example, an exterior body 3 described later) formed in a cylindrical shape and having an inner space (for example, an inner space 30 described later) extending in a stacking direction of the battery cells, the inner space of the exterior body accommodating the battery module and the voltage detection unit, wherein the voltage detection unit is disposed on a side surface (for example, a side surface 1a described later) of the battery module, and a recess (for example, a recess 35 described later) capable of accommodating the voltage detection unit is provided on an inner surface (for example, an inner surface 31a described later) of a side wall portion (for example, a side wall portion 31 described later) of the exterior body corresponding to the voltage detection unit.
According to the assembled battery described in the above (1), since the voltage detection unit disposed on the side surface of the battery module can be accommodated in the concave portion provided in the inner surface of the side wall portion of the exterior body, the battery module can be efficiently accommodated in the exterior body together with the voltage detection unit, and the assembled battery can be downsized.
(2) In the assembled battery described in (1), it is preferable that a spacer sheet (for example, a spacer sheet 140 described later) having a cutout portion (for example, a cutout portion 141 described later) provided from a surface (for example, an upper end surface 140a described later) disposed on the same side as a surface (for example, a terminal surface 110a described later) on which the electrode terminals of the battery cells are disposed to a surface (for example, a side end surface 140b described later) disposed on the same side as the side surface on which the voltage detection portion is disposed, be disposed between the adjacent battery cells of the battery module, and that the wiring member pass through the cutout portion of the spacer sheet to electrically connect the electrode terminals to the voltage detection portion.
According to the battery pack described in the above (2), since the wiring member is disposed in the cutout portion of the spacer, the amount of protrusion of the wiring member toward the outside of the battery module can be suppressed.
(3) In the assembled battery described in (1) or (2), it is preferable that a temperature control medium passage (for example, a temperature control medium passage 36 described later) for temperature control of the battery cell is provided in the side wall portion of the exterior member from one end surface (for example, an end surface 3a described later) of the exterior member to the other end surface (for example, an end surface 3a described later) along the stacking direction of the battery cells, and the recessed portion and the temperature control medium passage are arranged to be offset in the height direction of the side wall portion.
According to the assembled battery described in the above (3), since the temperature control medium passage and the concave portion can be arranged by using the dead (dead) space therebetween, the dimension of the assembled battery in the width direction can be reduced, and the assembled battery can be further downsized.
(4) In the assembled battery described in (3), it is preferable that the temperature control medium passage is disposed closer to the electrode terminals of the battery cells than the concave portion is in the height direction of the side wall portion.
According to the assembled battery described in the above (4), since the temperature control medium passage is disposed in a portion close to the electrode terminal of the battery cell which most requires temperature control, efficient temperature control can be achieved.
(5) In the battery pack according to (3) or (4), it is preferable that a heat conductive sheet (for example, a heat conductive sheet 150 described later) is disposed between a position corresponding to the temperature control medium passage in the inner surface of the side wall portion and a position corresponding to the temperature control medium passage in the side surface of the battery module.
According to the assembled battery described in the above (5), the heat of the temperature control medium in the temperature control medium passage can be transferred to the battery cells without affecting the arrangement of the voltage detection unit, and the temperature of the battery cells can be efficiently adjusted.
(6) In the battery pack according to any one of (1) to (5), the recess is preferably open on at least one end surface of the exterior body along the stacking direction of the battery cells.
According to the battery pack described in the above (6), the battery module can be inserted into the inner space while sliding from the end surface side of the exterior body where the recess is opened, and therefore the battery module can be housed in the exterior body very easily.
(7) In the assembled battery described in (6), it is preferable that the concave portion is open at both end surfaces of the exterior body along a stacking direction of the battery cells, and the exterior body includes an extrusion-molded product having an extrusion direction along the stacking direction of the battery cells.
According to the battery pack described in the above (7), the exterior body can be easily manufactured, and cost reduction can be achieved.
[ effects of the utility model ]
According to the utility model discloses, can provide a group battery, can accept battery module and voltage detection portion together in the outer cover with good efficiency.
Drawings
Fig. 1 is an overall perspective view of the battery pack of the present invention.
Fig. 2 is a perspective view showing a state in which the battery pack of the present invention is disassembled.
Fig. 3 is a perspective view showing the battery module of the battery pack according to the present invention in an exploded manner.
Fig. 4 is an enlarged perspective view of a main portion of the battery cell and the spacer.
Fig. 5 is an enlarged side view of a main portion of the battery cell and the spacer.
Fig. 6 is a sectional view of the battery pack taken along the line (a) - (a) in fig. 5.
Fig. 7 is a sectional view of the battery pack taken along the line (B) - (B) in fig. 5.
[ description of symbols ]
1: battery module
1 a: side surface (of battery module)
110: battery unit
110 a: terminal surface (of battery cell)
112: positive terminal (electrode terminal)
113: negative terminal (electrode terminal)
140: spacing piece
140 a: upper end face (of spacer)
140 b: side end face (of spacer)
141: cut-out part
150: heat conductive sheet
2: voltage detection unit
23: wiring harness (Wiring component)
3: exterior body
3 a: end face (of the outer covering)
30: inner space
31: side wall part (of the outer covering body)
31 a: inner surface (of side wall part)
35: concave part
36: temperature control medium passage
BP: battery pack
Detailed Description
Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.
Fig. 1 is an overall perspective view of the battery pack of the present invention. Fig. 2 is a perspective view showing a state in which the battery pack of the present invention is disassembled. Fig. 3 is a perspective view showing the battery module of the battery pack according to the present invention in an exploded manner.
The battery pack BP according to the present embodiment includes a battery module 1, a voltage detection unit 2, and an outer package 3, and is configured by housing the battery module 1 and the voltage detection unit 2 in the outer package 3. In the outer package 3 in which the battery module 1 and the voltage detection unit 2 are housed, band-shaped blocking members 37, 37 are fixed by, for example, fixing screws 371, and the battery module 1 and the voltage detection unit 2 are prevented from coming out of the outer package 3.
As shown in fig. 2 and 3, the battery module 1 is configured by integrally fastening a plurality of stacked battery cells 110 together with a pair of end plates 120 by a fastening member 130. In the directions shown in the drawings, the direction D1 is a direction along the stacking direction of the plurality of battery cells 110, and indicates the longitudinal direction of the battery module 1. The direction D2 is a direction orthogonal to the stacking direction of the plurality of battery cells 110, and indicates the width direction of the battery module 1. The direction D3 is a direction orthogonal to the stacking direction of the plurality of battery cells 110, and indicates the height direction (vertical direction) of the battery module 1. In the direction D3, the upper side of the paper surface is "upper" and the lower side is "lower".
The battery cell 110 includes, for example, a lithium ion secondary battery, and an electrode body (not shown) is housed inside a cell case 111 having a rectangular parallelepiped shape made of aluminum, an aluminum alloy, or the like. The upper surface of the battery cell 110 is covered with a terminal surface 110a on which a pair of electrode terminals, a positive electrode terminal 112 and a negative electrode terminal 113, is protrudingly disposed.
The battery cell 110 has a box shape in which the thickness along the direction D1 is sufficiently small with respect to the width along the direction D2. As shown in fig. 3, the plurality of battery cells 110 are stacked in the thickness direction with the respective terminal surfaces 110a facing upward so that the terminal surfaces 110a are flush with each other. The adjacent battery cells 110 and 110 are arranged such that the positive electrode terminals 112 and the negative electrode terminals 113 are alternately aligned when viewed in the stacking direction. The adjacent battery cells 110 and 110 are insulated from each other by sandwiching a spacer 140 including an insulating material therebetween, and are maintained at a fixed interval.
The end plates 120 are rectangular plate-shaped members formed of metal, resin, or a composite thereof, and are disposed at both ends of the plurality of stacked battery cells 110 in the stacking direction. All the battery cells 110 are disposed so as to be sandwiched between the pair of end plates 120, and are integrally fastened by a pair of fastening members 130, 130. As shown in fig. 3, a spacer 140 is also interposed between the battery cells 110 disposed at both ends in the stacking direction and the end plate 120.
The positive electrode terminal 112 and the negative electrode terminal 113 adjacent to each other in the stacking direction of the battery cells 110 are electrically connected by a bus bar 114. The bus bar 114 is fixed so as to straddle the positive electrode terminal 112 and the negative electrode terminal 113 by fitting the adjacent positive electrode terminal 112 and the negative electrode terminal 113. The bus bar 114 shown in the present embodiment includes a thin metal plate material in a rectangular flat plate shape, but is not particularly limited to this, and may be, for example, a metal wire (wire). In fig. 3, a part of the bus bar 114 is not shown.
The bus bar 114 shifts the electrically connected positive electrode terminal 112 and negative electrode terminal 113 one by one in each row of the electrode terminals on both sides of the battery cell 110. Therefore, each bus bar 114 connects all the battery cells 110 in series by electrically connecting all the adjacent positive and negative terminals 112 and 113 except for one of the pair of electrode terminals (in the present embodiment, the positive terminal 112A of one of the battery cells 110 and the negative terminal 113A of the other battery cell 110) of the two battery cells 110 and 110 disposed at both ends in the stacking direction. However, in the battery module 1, all the battery cells 110 in the battery module 1 may be connected in parallel by the bus bars 114 by stacking the adjacent battery cells 110, 110 with the positive electrode terminals 112 and the negative electrode terminals 113 arranged on the same side.
The fastening member 130 is a metal connecting band that binds the entire plurality of stacked battery cells 110 and the pair of end plates 120, and is formed long along the stacking direction of the battery cells 110. The pair of fastening members 130, 130 are disposed so as to sandwich the entire stack of the plurality of stacked battery cells 110 and the pair of end plates 120, 120 from both sides. The fastening member 130 has an opening 131 that is substantially rectangular and open in the longitudinal direction. Most of the side surfaces 110b of the battery cells 110 and the side end surfaces 140b of the spacers 140 sandwiched between the pair of end plates 120, 120 are exposed to the inside of the opening 131.
Fastening members 130, 130 have fixing pieces 132, 132 bent at right angles inward (toward battery cell 110) at both ends in the longitudinal direction (direction D1). As shown in fig. 2 and 3, the fastening member 130 is fixed to the outer surface 120a of the end plate 120 by fixing pieces 132 and 132 using an appropriate number of fixing members 133 such as bolts. As a result, a binding force is applied to all the battery cells 110 in the stacking direction between the end plates 120, 120 by the pair of fastening members 130, and expansion of the battery cells 110 due to charge and discharge is suppressed.
The voltage detection unit 2 shown in the present embodiment is disposed on the side surface 1a of the battery module 1 facing the width direction. The side surface 1a is a surface formed by a side surface 110b of each of the plurality of stacked battery cells 110 and a side end surface 140b of each of the spacers 140 interposed between the adjacent battery cells 110, 110. The voltage detection unit 2 is disposed on one side surface 1a of both side surfaces 1a, 1a of the battery module 1 facing the width direction. This suppresses the height of the battery module 1, and as a result, the height of the battery pack BP can be suppressed.
The voltage detection unit 2 is a voltage detection circuit including a plurality of electronic components, not shown, housed in a rectangular parallelepiped housing 20. As shown in fig. 2 and 3, the voltage detection unit 2 according to the present embodiment extends in the longitudinal direction of the battery module 1, but is shorter than the entire length of the battery module 1. As shown in fig. 3, the voltage detection unit 2 is fixed to the spacer 140 corresponding to the positions of the mounting portions 21 and 21 by the fixing screws 22 by the mounting portions 21 and 21 integrally provided at both ends in the longitudinal direction.
The voltage detection unit 2 detects the voltage of the battery cells 110 via the plurality of harnesses 23, and outputs the detection result to the outside of the battery module 1 (the outside of the battery pack BP) via a signal line (not shown). The wire harness 23 corresponds to the "wiring member" of the present invention. In fig. 3, only a part of the wire harness 23 is illustrated.
One end of each wire harness 23 is fixed and electrically connected to each bus bar 114 by an appropriate fixing means such as welding or screwing. The other end of each wire harness 23 extends from the bus bar 114 to the voltage detection unit 2 through the spacer 140. As shown in fig. 3, a connector 231 is provided at the other end of each wire harness 23. The other end of each harness 23 is detachably connected to the housing 20 of the voltage detection unit 2 via a connector 231, and is electrically connected to a voltage detection circuit inside the housing 20. However, the other end of each harness 23 may be connected to the voltage detector 2 in a non-detachable manner.
Here, the spacer 140 will be described in detail with reference to fig. 4. Fig. 4 is an enlarged perspective view of a main portion of the battery cell and the spacer.
The spacer 140 includes a rectangular plate-like member formed of an insulating member such as resin. The upper end surface 140a of the spacer 140 is disposed on the same side as the terminal surface 110a of each battery cell 110, and the side end surface 140b of the spacer 140 visible in fig. 4 is disposed on the side surface 1a of the battery module 1 on which the voltage detection unit 2 is disposed.
The spacer 140 has a notch 141 extending from the upper end surface 140a to the side end surface 140 b. The notch 141 is formed so as to open from the upper end surface 140a to the side end surface 140 b. The notch 141 in the side end surface 140b is formed to a position above the mounting position of the voltage detection unit 2. The notch 141 has a notch width (width along the direction D1) smaller than the thickness of the spacer 140 (thickness along the direction D1). Therefore, the notch 141 is formed in a slit (slit) shape having a predetermined depth from the upper end surface 140a to the side end surface 140b of the spacer 140. However, the cutout portion 141 has a cutout width equal to or larger than the outer diameter of the wire harness 23.
The side end surface 140b of the spacer sheet 140 is disposed so as to be flush with the side surface 110b of each of the plurality of stacked battery cells 110 or slightly recessed from the side surface 110 b. However, a protruding portion 142 that slightly protrudes laterally from the side surface 110b of the battery cell 110 is provided in a portion of the side end surface 140b that is located below the notch portion 141. The convex portion 142 constitutes a mounting portion of the voltage detection portion 2. Screw holes 143 are provided on the surface of the convex portion 142 for screwing the fixing screws 22 for fixing the mounting portion 21 of the voltage detection portion 2. The projection 142 is disposed inside the opening 131 of the fastening member 130 and exposed from the opening 131.
Referring to fig. 5 to 7, the structure in which the bus bar 114 and the voltage detection part 2 are electrically connected by the wire harness 23 via the spacer 140 will be further described. Fig. 5 is an enlarged side view of a main portion of the battery cell 110 and the spacer 140. Fig. 6 is a sectional view of the battery pack BP cut along the line (a) - (a) in fig. 5. Fig. 7 is a sectional view of the battery pack BP when cut along the line (B) - (B) in fig. 5.
The spacers 140 provided in the battery module 1 shown in the present embodiment are all of the same configuration. Therefore, in the battery module 1, the notch 141 of the spacer sheet 140 and the projection 142 below the notch 141 are disposed between the adjacent battery cells 110, 110. The voltage detection unit 2 is attached in contact with the convex portion 142, and is fixed to the screw hole 143 of any one of the convex portions 142 corresponding to the attachment portions 21 and 21 by a fixing screw 22. Thus, the voltage detection unit 2 is fixed to the side surface 1a of the battery module 1 inside the opening 131 of the fastening member 130, and protrudes laterally from the fastening member 130 through the opening 131. Voltage detection unit 2 is disposed slightly away from side surface 110b of battery cell 110 by being fixed to convex portion 142 of spacer 140, and does not directly contact battery cell 110. Therefore, the voltage detection unit 2 can also be made of the metal housing 20.
Each harness 23 extends from the bus bar 114 toward the voltage detection unit 2 along the spacer 140, and is connected to the voltage detection unit 2 at the position of the notch 141 by passing through the notch 141. In the battery module 1 shown in the present embodiment, all the wire harnesses 23 are routed through the inside of the fastening member 130 and through the cut-out portions 141 of any of the spacer sheets 140. Therefore, as shown in fig. 2, 6, and 7, all of the wire harnesses 23 are neatly collected inside the fastening member 130 without protruding significantly outside the battery cells 110 and the spacer 140. Thereby, the protruding amount of the wire harness 23 toward the outside of the battery module 1 is suppressed.
As shown in fig. 2 and 3, heat conductive sheets 150, 150 are provided on the respective side surfaces 1a, 1a of the battery module 1, and the heat conductive sheets 150, 150 are made of a synthetic resin having excellent heat conductivity such as silicone rubber. The heat conductive sheet 150 is formed in a long sheet shape along the longitudinal direction of the battery module 1 so as to be in contact with the side surfaces 110b of all the battery cells 110. The heat conductive sheet 150 is attached to both side surfaces 1a, 1a of the battery module 1 facing the opening 131 of the fastening member 130, but the amount of protrusion toward the side of the battery module 1 is smaller than the amount of protrusion toward the side of the voltage detection unit 2. That is, the voltage detection unit 2 protrudes laterally from the heat conductive sheet 150.
The heat conductive sheets 150 and 150 are disposed at the same height as the side surfaces 1a and 1 a. Specifically, the heat conductive sheet 150 is disposed in the opening 131 of the fastening member 130 so as to be close to the electrode terminals (the positive electrode terminal 112 and the negative electrode terminal 113) of the battery cell 110 as much as possible. The heat conductive sheet 150 disposed on the same side surface 1a as the voltage detection unit 2 is disposed above the voltage detection unit 2.
The exterior body 3 is formed in a cylindrical shape from a metal material such as aluminum, and is provided so as to cover the outer periphery of the battery module 1 configured as described above. Specifically, the exterior body 3 is formed in a rectangular tube shape by the left and right side walls 31 and 32, and the upper wall 33 and the bottom wall 34, and has an inner space 30 extending along the longitudinal direction of the battery module 1, that is, the stacking direction of the battery cells 110 on the inside thereof. The inner space 30 shown in this embodiment is open in a rectangular shape at both end surfaces 3a and 3a of the exterior body 3. The inner space 30 extends along the longitudinal direction (direction D1) of the exterior body 3 while maintaining a rectangular opening shape.
As shown in fig. 6, the width W1 of the inner space 30 is larger than the width W2 of the battery module 1 excluding the voltage detection part 2 and the heat conductive sheets 150 and 150, and is smaller than the width W3 of the battery module 1 including the voltage detection part 2 and the heat conductive sheets 150 and 150. Therefore, the inner surface 31a of the side wall portion 31 facing one of the inner spaces 30 (the side where the voltage detection unit 2 of the battery module 1 is disposed) has a recess 35 capable of accommodating the voltage detection unit 2 at a position corresponding to the voltage detection unit 2. Since the voltage detection unit 2 shown in the present embodiment is disposed in the lower portion of the battery module 1, the recess 35 is also disposed in the lower portion (the bottom wall portion 34) of the inner surface 31a of the side wall portion 31.
Battery module 1 is accommodated in inner space 30 of exterior body 3 with voltage detector 2 accommodated in recess 35. Therefore, the battery module 1 is efficiently housed in the exterior body 3 together with the voltage detection unit 2. Since the voltage detection unit 2 protruding laterally from the side surface 1a of the battery module 1 is housed in the concave portion 35, the side wall portion 31 can be brought as close as possible to the battery module 1. This can suppress the width of the outer package 3, and can reduce the size of the battery pack BP.
The concave portion 35 shown in this embodiment is formed to be opened to both end surfaces 3a and 3a of the exterior body 3. That is, the recess 35 is recessed at a constant depth over the entire length of the side wall 31. However, the recess 35 may be formed so as to be open to at least one end surface 3a of the package 3. This enables battery module 1 having voltage detection unit 2 disposed on side surface 1a to be inserted (slot-in) into inner space 30 while sliding from end surface 3a side of exterior body 3 where recess 35 opens. Therefore, the operation of storing the battery module 1 in the exterior body 3 can be performed extremely easily. The outer package 3 does not need to have a divided structure. When the concave portion 35 is open at both end surfaces 3a, 3a of the exterior body 3, the operation of storing the battery module 1 can be performed from either of both end surfaces 3a, 3a of the exterior body 3, and therefore, the workability can be further improved.
Temperature control medium passages 36, 36 for temperature control of the battery cells 110 are provided in the side wall portions 31, 32 of the exterior body 3, respectively. The temperature control medium passages 36 and 36 extend continuously from one end surface 3a to the other end surface 3a of the package 3 linearly along the longitudinal direction of the package 3. The temperature control medium passages 36 and 36 supply the temperature control medium from the temperature control medium supply pipe, not shown, to flow the temperature control medium through the side wall portions 31 and 32 of the exterior body 3. As the temperature control medium, cold air or cold water for cooling the battery cells 110 is generally used, but hot air or hot water may be used when the battery cells 110 need to be heated.
The positions of the temperature control medium passages 36, 36 in the height direction correspond to the positions of the heat conductive sheets 150, 150 of the battery module 1 in the height direction. The temperature-regulating medium passages 36 and 36 shown in the present embodiment are disposed near the upper portions (near the upper wall portion 33) of the side wall portions 31 and 32 in the height direction, and are disposed at positions closer to the electrode terminals (the positive electrode terminal 112 and the negative electrode terminal 113) of the battery cell 110 than the recessed portion 35. Therefore, the heat conductive sheets 150, 150 of the battery module 1 are in contact with the inner surfaces 31a, 32a of the side walls 31, 32 at the upper portions (upper wall portions 33) in the height direction of the side walls 31, 32, corresponding to the positions of the temperature control medium passages 36, 36. Thus, the heat of the temperature control medium in the temperature control medium passages 36, 36 is transmitted to the heat conductive sheets 150, 150 via the relatively thin wall portions 361, 361 disposed between the temperature control medium passages 36, 36 and the inner space 30, and further transmitted from the heat conductive sheets 150, 150 to the battery cells 110. The temperature control medium passages 36 and 36 in the present embodiment are disposed in the vicinity of the electrode terminals (the positive electrode terminal 112 and the negative electrode terminal 113) of the battery cell 110, which most require temperature control, and therefore effective temperature control can be achieved.
The concave portion 35 and the temperature control medium passage 36 are offset in the height direction of the side wall portion 31 and are disposed with a dead space therebetween. That is, the concave portion 35 shown in the present embodiment is disposed to be offset below the temperature control medium passage 36, and is provided by utilizing a dead space below the temperature control medium passage 36. Therefore, even if the concave portion 35 and the temperature control medium passage 36 are formed in the side wall portion 31, the thickness of the side wall portion 31 can be suppressed to the minimum necessary, and the battery pack BP can be further downsized. Further, since the inner surface 31a (wall 361) of the side wall portion 31 having the temperature control medium passage 36 can be brought as close to the battery module 1 as possible, the thickness of the heat transfer sheet 150 can be reduced, and the temperature adjustment efficiency of the battery cells 110 via the heat transfer sheet 150 can be improved.
The outer package 3 formed in a cylindrical shape may be formed by, for example, cutting the inner space 30, the concave portion 35, and the temperature control medium passages 36, 36 of the outer package 3, but when the inner space 30, the concave portion 35, and the temperature control medium passages 36, 36 are all linearly continuous along the longitudinal direction of the outer package 3 and are open at both end surfaces 3a, 3a of the outer package 3 as in the outer package 3 shown in the present embodiment, an extrusion molded product extruded in the stacking direction of the battery cells 110 may be used. This makes it possible to easily manufacture the exterior body 3 having a uniform structure along the longitudinal direction, and also to reduce the cost of the battery pack BP.
The battery pack of the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, in order to prevent the battery module 1 housed in the exterior body 3 from coming off, a lid member that closes the entire end surface 3a of the exterior body 3 may be provided instead of the band-shaped closing member 37. The cover member is provided with communication ports communicating with the temperature control medium passages 36, so that the temperature control medium can be circulated through the temperature control medium passages via the communication ports.
Moreover, the spacer 140 may be formed with a notch groove communicating with the notch 141 over the entire length of the upper end surface 140a, and the wire harness 23 passing from the bus bar 114 through the upper end surface 140a of the spacer 140 and toward the voltage detection unit 2 may be passed through the notch groove, thereby further suppressing the wire harness 23 from protruding upward.
Further, the temperature control medium passage 36 and the heat conductive sheet 150 on the side where the voltage detection unit 2 is not disposed may be formed over the entire length in the height direction.
Claims (7)
1. A battery pack, comprising: a battery module configured by stacking a plurality of battery cells; a voltage detection unit electrically connected to an electrode terminal of the battery cell via a wiring member; and a cylindrical outer package having an inner space extending in a stacking direction of the battery cells, the outer package accommodating the battery module and the voltage detection unit in the inner space of the outer package,
the voltage detection unit is disposed on a side surface of the battery module,
the outer case has a recess in an inner surface of a side wall portion thereof corresponding to the voltage detection unit, the recess being capable of accommodating the voltage detection unit.
2. The battery pack according to claim 1,
a spacer is disposed between the adjacent battery cells of the battery module,
the separator sheet has a cutout portion provided from a surface on the same side as a surface on which the electrode terminals of the battery cells are arranged to a surface on the same side as the side surface on which the voltage detection portion is arranged,
the wiring member passes through the cutout of the spacer sheet to electrically connect the electrode terminal and the voltage detection unit.
3. The battery pack according to claim 1 or 2,
a temperature control medium passage for regulating the temperature of the battery cell is provided inside the side wall portion of the exterior body from one end surface to the other end surface of the exterior body along the stacking direction of the battery cells,
the concave portion and the temperature control medium passage are arranged to be offset in a height direction of the side wall portion.
4. The battery pack according to claim 3,
the temperature-regulating medium passage is disposed closer to the electrode terminal of the battery cell than the recess in the height direction of the side wall portion.
5. The battery pack according to claim 3,
the heat conductive sheet is disposed between a position corresponding to the temperature control medium passage on the inner surface of the side wall portion and a position corresponding to the temperature control medium passage on the side surface of the battery module.
6. The battery pack according to any one of claims 1 or 2,
the recess is open on at least one end surface of the exterior body along the stacking direction of the battery cells.
7. The battery pack according to claim 6,
the concave portion is open at both end surfaces of the exterior body along the stacking direction of the battery cells,
the outer package includes an extrusion-molded product having an extrusion direction along the stacking direction of the battery cells.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018125955A JP7042174B2 (en) | 2018-07-02 | 2018-07-02 | Battery pack |
| JP2018-125955 | 2018-07-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209843807U true CN209843807U (en) | 2019-12-24 |
Family
ID=68899189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920981451.6U Active CN209843807U (en) | 2018-07-02 | 2019-06-27 | Battery pack |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7042174B2 (en) |
| CN (1) | CN209843807U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022002549A1 (en) * | 2020-06-29 | 2022-01-06 | Robert Bosch Gmbh | Battery module and battery |
| JP2022140360A (en) * | 2021-03-10 | 2022-09-26 | ドクター エンジニール ハー ツェー エフ ポルシェ アクチエンゲゼルシャフト | battery module |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7264118B2 (en) * | 2020-06-05 | 2023-04-25 | トヨタ自動車株式会社 | Cooler |
| CN114927818B (en) * | 2022-05-16 | 2024-04-19 | 北京科易动力科技有限公司 | Battery module and battery pack |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002157984A (en) | 2000-11-21 | 2002-05-31 | Shin Kobe Electric Mach Co Ltd | Battery pack and battery module |
| JP2007048637A (en) | 2005-08-10 | 2007-02-22 | Nissan Motor Co Ltd | Battery pack and case for battery pack |
| JP5372449B2 (en) | 2008-09-24 | 2013-12-18 | 三洋電機株式会社 | Battery system |
| JP2011210455A (en) | 2010-03-29 | 2011-10-20 | Yachiyo Industry Co Ltd | Battery cell module |
| JP2011210657A (en) | 2010-03-30 | 2011-10-20 | Denso Corp | Battery pack |
| JP5724590B2 (en) | 2011-04-28 | 2015-05-27 | トヨタ自動車株式会社 | vehicle |
| JP2013012441A (en) | 2011-06-30 | 2013-01-17 | Sanyo Electric Co Ltd | Electric power source device and vehicle including the same |
| JP5482864B1 (en) | 2012-11-05 | 2014-05-07 | 株式会社豊田自動織機 | Battery module |
-
2018
- 2018-07-02 JP JP2018125955A patent/JP7042174B2/en active Active
-
2019
- 2019-06-27 CN CN201920981451.6U patent/CN209843807U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022002549A1 (en) * | 2020-06-29 | 2022-01-06 | Robert Bosch Gmbh | Battery module and battery |
| JP2022140360A (en) * | 2021-03-10 | 2022-09-26 | ドクター エンジニール ハー ツェー エフ ポルシェ アクチエンゲゼルシャフト | battery module |
| JP7366175B2 (en) | 2021-03-10 | 2023-10-20 | ドクター エンジニール ハー ツェー エフ ポルシェ アクチエンゲゼルシャフト | battery module |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7042174B2 (en) | 2022-03-25 |
| JP2020004680A (en) | 2020-01-09 |
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